The main shaft of the ribbon mixer machine is wound with two layers of screw belts in different directions. Driven by power, the material is quickly stirred. The equipment has the characteristics of better mixing uniformity, higher production efficiency, and extremely low failure rate. The equipment is a batch mixer, according to how many materials are handled in each batch to select the appropriate equipment model.

1. Flexible material selection scheme of spiral ribbon mixer

The spiral ribbon mixer can be customized with carbon steel, manganese steel, 304 stainless steel, 316L stainless steel, 321 stainless steel, and other materials, and different materials can also be used in combination; when selecting materials for equipment, it can be divided into parts in contact with materials and parts not in contact with materials;

In addition, functional coating or protective layer such as anti-corrosion, anti-adhesion, isolation and wear resistance can be added in the screw belt mixer;

The surface treatment of stainless steel includes sandblasting, wire drawing, polishing and mirror surface treatment, which can be applied to different parts;

2. Reliable drive configuration of ribbon mixer machine

The small ribbon mixer is equipped with driving devices with different capacity, power and output speed according to the material property, starting mode and mixing mode.

The drive motors include: ordinary motor, anti-riot motor, variable frequency motor, high efficiency and energy-saving motor, high protection level motor, and motor under different voltage; common reducer: R, K, F series gear reducer, cycloid pinwheel reducer, general gear reducer, planetary gear reducer;

Common connection methods: direct connection, pulley connection, hydraulic coupling connection.

As one of the leading ribbon mixer manufacturers in China, Niel Machinery has top quality ribbon mixer for sale, which is sold worldwide and receives good comments from users. We are sure that our ribbon blender machine price is competitive among other manufacturers. Contact us to get a good price today!

Cylindrical Lens can be used in a single axial convergence or divergence of the beam and found in optical measurement, laser scanning, spectroscopy, laser diode output beam shaping, the X-ray light microscopic imaging, and many other industries and fields have a wide range of applications.

Turn the quasi-direct light source into the line light source

L = 2(r0/f)(z+f)

It is the most extensive application of cylindrical lens. As shown in the figure below, The quasi-direct light source with radius r0 is irradiated into a concave cylindrical lens with a focal length of -f(The image is in order to illustrate the principle more clearly, so amplify the beam radius). The beam will diverge in half theta (theta = r0 / f). At this point, it can also be approximated as the divergence of the point source at the focal point -f. The distance to the back of the lens is z. The width of the line beam is 2r0 (ignoring the divergence of the  Gaussian-distributed beam spot), but the length of the line beam is changed

L = 2 (r0 / f) (z + f)

When z is greater than f, the expansion ratio approaches z/f, and the length of the line is proportional to z.

If need in the z produces width is very narrow line light source, can be in the plane concave cylindrical lens front end or back end of a flat convex cylindrical lens focal length for z, with the orthogonal plane concave cylindrical lens place, to compress the beam width.

【 Quick Start】The focus and alignment of light

The diode outputs beam of collimation

The laser diode output beam diverges in an asymmetric form, and its quasi-direct work is more challenging. for example, to divergence angle theta. Theta 1 x 2 = 10 ° x 40 ° diode light source, if only use the standard spherical lens, and only in a single direction on collimating, another direction divergence or convergence will happen. Using a cylindrical lens that the problem is decomposed into two one-dimensional directions, through the combination of two orthogonal cylinder lens, two directions can be collimated at the same time.

The selection of the cylindrical lens and the installation of the light road should follow the below rules:

θ1/θ2 = 10°/40° = f1/f2

1)To make the spot symmetrical after the adjustment, the focal length ratio of the two cylindrical lenses is equivalent to the divergence angle.

Theta 1 / theta 2 = 10°/ 40° = f1 / f2

2）The laser diode can be approximated as a point source, to get the collimating output, The spacing between the two cylinders and the light source is equal to the focal length of the two.

3）The spacing between the main planes of the two cylinders should be equal to the difference between the focal length of the f2-f1, and the actual spacing between the two lenses is equal to BFL2 - BFL1. Like the spherical lens, the convex side of a cylindrical mirror should be directed toward a quasi-direct beam to minimize as much as possible.

d1 = 2f1(tan(θ2/2))

d2 = 2f2(tan(θ1/2))

4）Because the laser diode output beam diverges faster, we need to be careful to confirm that the spot size on each cylinder is no longer than the effective light aperture of the lens. Because the distance of the cylinder is equal to its focal length, the maximum spot width of each cylinder should be followed

D1 = 2f1 (theta 2/2)

D2 is equal to 2f2, the tangent of theta one half.

For example, Newport CKX012 (f1 = 12.7 mm, BFL1 = 7.49 mm) and CKX050 (f2 = 50.2 mm, BFL2 = 46.03 mm) the combination of cylinder lens, the spacing between the two lens on the plane for BFL2 - BFL1 = 38.54 mm. The diameter of the spot in the first cylindrical lens is

D1 = 2 (12.7 mm) tan (20 °) = 9.2 mm

The diameter of the light spot in the second cylinder is

D2 = 2 (50.2 mm) tan (5 °) = 8.8 mm

Although there is still a little asymmetry, the simple combinations of these two cylindrical lenses have greatly improved the quality of the beams.

Hyperion Optics always believes in the concept of bringing “Precision, Performance, Satisfaction, Cost-wise products” to our customers to meet the expected procurement experience. We are not simply manufacturing components and lenses, but delivering a comfort and worry-free user experience with outstanding quality assurance promise to you.

We need a outdoor trash receptacles parks  can to match the four seasons of the park. Flowers blossom in spring, cool breeze in summer is credible, leaves fall in autumn and snowflakes fly in winter. They can follow the changes of these four seasons together and make garbage cans a part of the park.

Trash Can for Park

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MAX Metal Product has been well approved and trusted among lots of customers by keeping creative and cooperative values "Equality, Respect, All-win" since setting up.

The paddle agitator has the simplest structure. The blades are made of flat steel, welded or fixed on the hub with bolts. The number of blades is 2, 3 or 4. The blade forms can be divided into flat blade and folded blade. That is to say, according to the shape and characteristics of the blades, it can be divided into flat blade agitator and inclined blade agitator. The horizontal agitator produces radial force while the inclined agitator produces axial force. The paddle agitator is suitable for mixing low viscosity liquid, suspension and solution.

Application of paddle mixer machine

1. In the liquid-liquid system, the paddle mixer machineis used to prevent separation and make the tank temperature uniform. In the solid-liquid system, it is mainly used to prevent solid settlement.

2. Paddle type mixer is mainly used for fluid circulation. Because of the same displacement, the power consumption of the folded blade type is less than that of the flat blade type, and the operation cost is lower, so the axial flow blade is used more.

3. It can also be used to stir high viscosity fluid, promote the up and down exchange of fluid, replace the high price spiral belt impeller, and obtain good results.

Precautions for maintenance of paddle mixer machine

Regularly replenish lubricating oil for reducer and chain, grease for main shaft bearing and door opening bearing;

The chain should always be tightened slightly, otherwise, the loose chain is easy to cause jumping teeth, blade fighting, and other failures, resulting in unnecessary losses;

Check and supplement the lubricating oil in the oil mist eliminator of the pneumatic system regularly, and check the water collection in the air-water separator to ensure that the water level in the tank does not exceed 80%;

Check whether there is air (oil) leakage in the pneumatic pipeline and interface, if any, replace the air pipe or plug in the connector again;

Check the mixer rotor regularly and remove the sundries such as braided tape, nylon thread head, etc;

Check whether there is leakage at the shaft head of paddle agitator mixer frequently. If there is leakage, tighten the gland bolt slightly, and replace the packing after the packing is worn out. Check the four corners of the mixer door frequently for leakage. If there is leakage, adjust the support of the door arm and tighten the screws.

Niel Machinery is one of the leading powder mixing machine manufacturers in China. We supply a series of professional powder mixer machine. If you want to buy paddle mixer, please leave a message to us or contact us via sales@shniel.com.

Advanced Fabrication Technology

Hyperion Optics has over a decade of experience in optical and mechanical design, manufacturing, and optical assembly. With the rapid growth in the photonics market and an increasing demand for precision and accuracy, we have heavily invested in our fabrication technology in order to better serve the optics community.

Hyperon Optics has expanded its fabrication capabilities through employing skilled optics technicians and investing in advanced devices and equipment. A few examples include the Optotech machining and polishing station and the Ametek aspherical machining device. On the metrology side, we are equipped with the latest Zygo Verifire™ interferometer and MTF testing station. From manufacturing to inspection, we at Hyperion believe that our value lies in the reliability of our technology and the talents of our people.

Our optical and engineering team consists of 15 optical experts who have expertise and familiarity with high-end applications. Our engineers’ specialty and understanding of the optical system can ensure that your needs would be fully understood and met. We are especially proud of our professional customer service that offers full support throughout the products’ life cycle.

 Our production team has been serving our valued customers for massive projects with excellent quality parts delivered; in return, our team is becoming mature in terms of potential production risks finding and pre-cautious regarding specific parameters during prints review. This is imperative that as a lead custom lens manufacturer, it is our duty to avoid unnecessary production failure after careful specs examination.

Over the past 12 years, Hyperion has built a rich portfolio of successful client stories. In return, our team has gained maturity in terms of potential production risks detection and precaution regarding specific parameters during prints evaluation and review. In our quotation process, it is our common standard that we bear the responsibility of careful review and specs examination to avoid production pitfalls. In many cases, our effort has paid off as we worked with our clients to revise their specs in favor of manufacturability and cost-savings.

For instance, we typically simulate the aspherical equation even during the RFQ process to ensure that there there are no misunderstandings, and that if any potential failore, can be avoided prior to actual production. For aspherical designs that we are not confident about, we offer free trial on low-cost material for feasibility testing upon request to understand and study the production challenge.

Besides continuously improving our fabrication technology, we still manufacture and hold pride in our conventional methodology that involves high-speed polishers and machinery. With our outstanding production staff and metrology procedure, we are confident to deliver high-quality precision optics for you and your company.

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Led bathroom mirrors with bluetooth are getting more and more popular at last 10 years, because of its energy saving and intelligent application in our life. With difference of traditional mirror, it will provide 35% more clarity. Not to mention it have touch switch of light, provide a most natural feel daytime light color; Anti-fog function, always make steam free, which is very useful and easy to be neglected; Blue-tooth for music and speaker, give more fun and convenient at every moment in your bathroom.

The spremium Led mirror is the perfect union of stylish design and modern technology. We have huge illuminated bathroom mirror sale, including Bluetooth mirror, magnifying mirror, led lighted mirror cabinet, and the newest design infinity mirror, all of them have IP44 rated frame/back, making them perfectly safe to be fitted within the bathroom. All of our bathroom mirror manufacturer scheming led mirrors can be mounted horizontally or vertically.

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MAX-SN334 Indoor Commercial  Trash Can For Office

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Powder mixer machine   is a mechanical device that uniformly mixes two or more materials by mechanical force, gravity, and the like. In the process of mixing, it is also possible to increase the surface contact area of the material to promote the chemical reaction; it can also accelerate the physical change.

Types of machine mixer powder   Commonly used powder mixer machines are divided into gas and low viscosity liquid mixers, medium and high viscosity liquid and paste mixers, powder and granular solid materials mixing machinery.

The gas and low viscosity liquid mixer features a simple structure and no rotating parts, low maintenance and repair, and low energy consumption. This type of mixing machine is divided into four types: airflow mixing, pipe mixing, jet mixing and forced circulation mixing.

Horizontal powder mixer for medium and high viscosity liquids and pastes generally have strong shearing action.

Thermoplastic material mixing machinery is mainly used for mixing thermoplastic materials (such as rubber and plastic) with additives; powdered and granular solid material mixing machines are mostly intermittent operations, and also include machines that combine mixing and grinding, such as rim machines.

Mixer Parts of Powder Mixer Machine

Mixer parts are mainly made of wear-resistant alloy materials, including high-speed mixing scraper, mixing fin, wear-resistant lining, mixing arm, mixing shovel, planetary shovel, mixing coulter, stirring rod, mixing raft, etc.

How Does Powder Mixer Machine Work?

The moving parts of the mechanical agitator also shear the liquid when it is rotated. The liquid is also subjected to shearing action when flowing through the wall and various fixing members installed in the container. These shearing effects will cause many Local eddy current diffusion.

For liquids of different density, composition, and immiscibility, the shearing action caused by the agitation and the strong turbulence shred the dense liquid into small droplets and uniformly disperse it into the main liquid.

About NIEL MACHINERY 

As one of the most professional powder mixing machine manufacturers in China, Neil Machinery is committed to the design and development of various types of powder mixing equipment . In combination with customer requirements, Neil Machinery can design the most suitable mixer for customers. At present, the main powder mixers are: ribbon mixer, paddle Mixers, gravity-free mixers, pull-out mixers, various laboratory mixers, and lift hopper mixers, all made of 304 or 316 stainless steel, meeting food safety requirements. Neil Machinery can provide customers with One-stop powder process solutions save customers time and provides the best solution.

Round concave mirrors are catoptric imaging. Mirrors( including convex) are reflecting back for imaging rather than get through the light, ray of light follows the law of reflection, that is what we called convergence. They always gather the light that shoot to the surface, ray of light that is entered parallelly will be focus on the spot again, ray of light is reflected from different angles because of different directions of surface normal. Round concave mirrors can not only focus parallel ray of light on the spot but also reflect parallel light from spot.

The diagram of a round concave mirror shows focus, focal length, centre of curvature and principal axis. Concave mirrors or gathering mirrors will deflect reflected ray of light. Concave mirrors will have different images because of the different distance between objects and mirrors, which is different from convex mirrors.

Round concave mirrors don’t have chromatic aberration because they are catoptric imaging, this advantage is can’t be compared with any lens. The resolution ratio is in direct proportion to the clear aperture of objective, it is difficult for the production of large aperture lens while concave mirrors that made according to reflection principal are easier. Therefore, round concave mirrors are always used for producing telescope.

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Illuminated mirrors advantages

Round led illuminated bathroom mirror is getting more and more popular at last 10 years, because of its energy saving and intelligent application in our life. Different to traditional mirror, it will provide 35% more clarity, not to mention it have touch switch of light, providing a most natural feel daytime light color; Anti-fog function, always make steam free, which is very useful and easy to be neglected; Blue-tooth for music and speaker, give more fun and convenient at every moment in your bathroom;

The Spremium illuminated Led bathroom mirror is the perfect union of stylish design and modern technology. We have huge collection of led mirrors including Bluetooth mirror, magnifying mirror, led lighted mirror cabinet, and the newest design infinity mirror, all of them have IP44 rated frame/back, making them perfectly safe to be fitted within the bathroom. All of our led mirrors can be mounted horizontally or vertically.

Why trust Spremium

All of Spremium illuminated led bathroom mirror driver with overload protection, waterproof Performance in stability 15W , 25W , 35W , 60W available 3 years warranty. CE/UL certified

All of Spremium illuminated led bathroom mirror with reliable SMD led, with 12V SMD5050/ 2835/3528/3014 input voltage, have more than 50000hours service life. 6500k led light color temperature for white, 2700-3000k for warm light.

All of Spremium illuminated led bathroom mirror is cooper free mirror, to avold black edge (unsightly black corrosion on the edge of the mirror), black spots (black corrosive spots throughout the mirror).

Spremium only have 4 years experience on Led bathroom mirror export, we know quality is the most important thing as a led mirror manufacturer in China. That’s why we only make quality led bathroom mirror, we only focus on quality led bathroom mirror, to make more and more people to understand that Made in China is not mean poor quality.If you want to buy it,we provide heavy led mirror sale service.

Kitchen is an important part of a family. It produces a lot of kitchen waste every day.

slim stainless steel kitchen trash can ?

The garbage bin designed for kitchen better meets the needs of putting kitchen waste into use, and makes kitchen waste valuable in later classification and utilization.

Trash Can for Kitchen

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The aspheric

When it comes to the lens, you have to mention the aspherical lens. In many people's understanding, the asperical lens is a symbol of high level, and the advanced lens is almost all aspherical lens.

Let's start with what is called a aspherical lens. The aspherical lens is contained in the camera lens, aspheric is often calculated according to the surface, some aspherical lens side, the other is not, or both sides is spherical, and so on.

In general, a lens with two or more aspherical lenses is a very advanced lens. So, is the aspheric surface a very difficult technique?

We can look at it from the other side.

Now, in terms of glasses, the aspheric surface is also very widely used, and in fact, it is no more expensive than the spherical lens. For numerical control grinders, the wave surface can also be made.

Clearly, many people's understanding of the aspheric surface is still stuck in the leica 501.2 myth, which itself has long since been broken.

Of course, many people would still use the so-called "grinding aspheric", but don't say what grind the aspheric surface. I believe that for many people, it's impossible to tell whether a picture is not a spherical lens.

Is the aspheric surface necessarily good?

Even if it's a cock shot, it's impossible for each lens to be aspherical, the aspheric lens is actually a supporting role in the lens, not the main character, the main corrective, the correction function, after the use of aspherical lenses, the image of the edge of the image will be solved well and the picture will be more average.

So, is it a good thing to have an aspheric surface? From the current situation, the use of aspheric surface technology has become the standard configuration, especially the high technology index lens, for example, large aperture wide-angle zoom lens, it is difficult to guarantee the quality of the picture without the aspheric surface.

But in terms of our film fans, the aspherical lens we can use is relatively limited, after all, we use the camera mainly concentrated in the last century 60-90s, until the 90s, aspherical lens or less. Here we're talking about 135, and less in 120. We have seen that CAI has built so many classic Hau shots, such as the 384.5 on SWC, and there is no aspherical lens.

In a series of SLR lenses designed by Mr. CAI for nikon, many of them have no aspheric surfaces. But it doesn't prevent these lenses from being a good shot, like chase 50, 1.4 SLR, and the picture is average.

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Hyperion Optics always believes in the concept of bringing “Precision, Performance, Satisfaction, Cost-wise products” to our customers to meet the expected procurement experience. We are not simply manufacturing components and lenses, but delivering a comfort and worry-free user experience with outstanding quality assurance promise to you.

The function of infinity mirrors

Since the invention of modern mirror technologies, a large effort was spent into inventing not only new build materials that could enable mirrored surfaces to be placed in new kinds of environments and products, but also new ways the mirrors can be used for art, fun, and aesthetic purposes. One of the most famous and easily found examples of such type of mirrors are lighted infinity mirror that are used as a decorations, art objects in museums or art exhibits, entertainment objects, parts of furniture or home decoration or sometimes in most mundane places such as shopping halls, barber shops, beauty salons, public spaces and elevators.

Unlike traditional mirrors, which are typically used for specific purposes like getting ready for work in the morning, infinity mirrors are more of an artistic decoration. Our stylish range of infinity mirrors is designed to make the beautiful statement in your bathroom by creating the illusion of never-ending pictures. Created for those looking for a future look, the infinity mirror is ideal for minimalist schemes and cutting-edge interior designs. Offer three color switch(white, yellow, blue), can be easily controlled by remote or sensor touch switch.

When you turn off light, it is just a perfect mirror for your bathroom. When you turn it on, it will be the center of your bathroom, catch eyes from your guests and family. All of our infinity mirrors have IP44 rated water proof, offer 2 years warranty to make our customer have confidence to our product too.

Why trust Spremium?

We have built our reputation here at spremium on high quality cooper free led bathroom mirror and dedicated customer service. We offer 2 years warranty for complete mirror, because led mirror manufacturer want you to believe that our product are exceptional too. If you want to buy infinity mirror, modern mirrors at incredibly affordable prices, if you are looking for a reliable, responsible led bathroom mirror supplier in China, spremium should be your only choice. For more information, please feel free to contact us.

We introduce   hotel lobby trash cans to you.

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MAX Metal has been well approved and trusted among lots of customers by keeping creative and cooperative values "Equality, Respect, All-win" since setting up.

美国大学新冠肺炎

美国大学新冠肺炎的情况一直让众多留学生和家长时刻关注着。截止至当地时间10日傍晚，全美国新冠肺炎（COVID-19）确诊人数已经超过849，患者死亡人数已高达29人。随着疫情的蔓延，全美各州都做出来相应的抗疫措施，多个州已经宣布进入紧急状态。美国大学新冠肺炎（COVID-19）政策也相继公布了。

求真校园疫情速递

随着新冠肺炎（COVID-19）的疫情升级，为了全体师生的安全，美国各大学也纷纷做出了相应的抗疫措施，其中宣布了停止上课或者改为网上授课的大学有：华盛顿大学、哈佛大学、南加州大学、加州大学伯克利分校、俄亥俄州立大学、普林斯顿大学、麻省理工大学、莱斯大学、福特汉姆大学、哥伦比亚大学等。

https://cdn.indeededu.com/uploads/2020/03/doctor-80x80.jpg 80w, https://cdn.indeededu.com/uploads/2020/03/doctor-36x36.jpg 36w, https://cdn.indeededu.com/uploads/2020/03/doctor-180x180.jpg 180w, https://cdn.indeededu.com/uploads/2020/03/doctor-120x120.jpg 120w, https://cdn.indeededu.com/uploads/2020/03/doctor-450x451.jpg 450w, https://cdn.indeededu.com/uploads/2020/03/doctor.jpg 665w" data-sizes="(max-width: 300px) 100vw, 300px" sizes="(max-width: 300px) 100vw, 300px" srcset="https://cdn.indeededu.com/uploads/2020/03/doctor-300x300.jpg 300w, https://cdn.indeededu.com/uploads/2020/03/doctor-80x80.jpg 80w, https://cdn.indeededu.com/uploads/2020/03/doctor-36x36.jpg 36w, https://cdn.indeededu.com/uploads/2020/03/doctor-180x180.jpg 180w, https://cdn.indeededu.com/uploads/2020/03/doctor-120x120.jpg 120w, https://cdn.indeededu.com/uploads/2020/03/doctor-450x451.jpg 450w, https://cdn.indeededu.com/uploads/2020/03/doctor.jpg 665w" /> 图源：Freepik

留学生如何面对美国大学新冠肺炎

出门在外的留学生们在这个特殊的时期里，请一定要保护好自己，做好防护措施。留学生们应该注意个人清洁，勤洗手，尤其是在接触口鼻眼之前。出门最好佩戴口罩，减少前往人员密集的场所。如非必要尽量不出门，迫不得已出门的话， 尽量自行开车或者自行车，避免城做公交车、地铁诸如此类拥挤式的交通工具。外出归家应第一时间换下外套，清洁双手。

避免接触动物（包含野味）、禽鸟及其粪便，不去有活禽的市场和海鲜市场，注意食物安全和卫生，避免进食或者食用未熟透的动物产品，包括奶类、肉类和蛋类等等。在美国常常是食用牛扒、鸡扒等肉类，在这个关键时期，求真小编再次提醒同学们一定要将肉类烹饪至全熟再食用。

如果出现身体不适，特别是伴随感冒发烧或者咳嗽症状，一定要第一时间进行就医，切莫耽误治疗。在去往医院的途中，一定要切记全程佩戴口罩，做好防护。

留学生们除了要做好疫期防护外，学习这方面也不能耽误。越来越多的美国高校做出了疫情期间将线下课转换为线上课的措施以抗疫情，以避免师生聚集增加感染的机率。可能很多留学生无法适应线上课的模式，担心成绩跟不上，GPA下降，带来学业危机。不用担心，危机也可以是转机。求真教育的学术辅导团队老师们为留学生推出了专属一对一在线学术辅导课程，专业双语老师授课可以保证同学在家也能学得安心，兼顾防疫安全与在校GPA，不必担心学习落后跟不上，反之借此疫情机会弯道超车将成绩提升上去。同学们，快联系求真教育吧，第一时间为你匹配最优师资，疫情期间让你的学业稳步上升。

求真寄语

如今疫情已成为一场全球危机，不管身处何方，留学生们请一定要照顾好自己，有任何学业上的困惑，请第一时间联系求真教育。新型冠状病毒， 求真与你一同奋斗，你的留学之路就让求真来保驾护航。

随着美国校园疫情肆虐，各个大学在预防疫情也是比之前有了更高等级的提升。部分留学生和家长也对美国大学疫情表示担忧。求真教育就来为大家梳理最新的美国大学各校的疫情应对措施，希望能帮助大家第一时间安排好自己的生活的学习，并对疫情做出有效的预防措施。

东西部著名大学均严阵以待

美国校园疫情下，美国大学采取的措施有所不同，但初衷都是希望学生少出门、少聚集、多待在家里或空气流通地方。加州大学伯克利分校宣布会对期中考试进行调整，包括时间和考试形式，部分教授宣布停课。洛杉矶分校则是为学生配备医护团队，建议有症状的学生不要到学校上课，目前也正在制定网课的安排。南加州大学则是建议取消三月到四月中旬的所有线下活动。华盛顿大学西雅图分校则宣布学生暂时需要先接受线上授课。

针对美国校园疫情，普林斯顿大学决定让学生从春假后到四月五日前在线上上课。范德堡大学已经取消所有线下课程，并且此政策会根据疫情发展进行调整，有可能延长至学期末。而纽约大学则宣布线上授课至少将持续到三月底。而斯坦福大学、哥伦比亚大学、普林斯顿大学为了学生的安全考虑，均已宣布停课。

独在异乡，留学生应该怎么办

很多留学生都反映，美国校园疫情严重的情况下，各学校应该像中国大学一样减少线下课程，改为更多地开发线上课程，让老师以直播的形式为学生答疑解惑。除此之外，网课系统也需要进一步完善，避免出现因为登陆人数过多，运行不稳定导致学生无法提交自己的作业和测验。在生活中，大家也要继续注重防护的三条原则：消灭传染源、切断传播途径以及保护好自身。

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同学们要注意经常洗手，并且在接触口鼻时最好用上纸巾或者提前消毒。在外出时，要注意佩戴口罩，并且注意深色面朝外、金属条朝上的佩戴原则。如果出现发烧、干咳或者有接触过感染患者，要注意及时上报，尽早就业。当时，平时要注意饮食均衡和多运动，宅在家中也要保持良好的身材和作息规律。

疫情之下，学业会何去何从

随着美国确诊人数的不断上升，相信同学们需要在家适当安排好自己的学习。尤其对于本学期前几次小测成绩不理想的同学，可以趁此机会再重新巩固自身对之前知识点的理解。而对于在准备明年春秋季转学和研究生申请的同学们而言，大家可以加强自身标化考试成绩的安排，保持每天的背书和题目练习，以备更好地迎接疫情过后，接踵而至的各类标化考试。

另外，也可以趁这段时间初步规划好自身的兴趣、专业、学校定位等，并且完成文书的头脑风暴和初稿框架，更好地备战九月到来的申请季。当然，不管未来何去何从，大家千万不要轻信谣言，一定要注意接收来自学校官方的邮件。更不要造谣传谣，导致不必的恐慌。同学们更多是要把握好这段非常时期的停歇，更好地提高自己。

求真寄语

美国校园疫情目前仍属于初步阶段，美国大学采取防护措施更多是为了保障学生们的身体健康。同学们要认真服从学校的安排，合理安排学业，并且根据自身的实际，提升自己。相信春暖花开，疫情即将会消散，到时候同学们可以健健康康把学上，安安全全把家还。了解最新的美国新冠肺炎疫情信息，请关注求真教育美国新冠疫情信息专栏。

美国大学预防疫情

近期，新冠肺炎疫情在全球范围内扩散蔓延。截至美国东部时间3月10日晚，美国新型冠状肺炎病例已突破1000例，其中包括31例死亡。随着8个州宣布进入紧急状态，美国大学预防疫情也有相应的举措。

美国大学预防疫情举措

为了保障师生健康，美国大学预防疫情采取相应举措，对紧急状态作出积极的响应：

• 华盛顿大学：当地时间3月5日宣布本学期剩余的所有课程和期末考试，将全部教学转为网络授课。
• 普林斯顿大学：从3月23日起，所有讲座和研讨会均在网上举行。
• 加州大学伯克利分校：从3月10日起开始暂停大多数面对面授课，直至3月29日春假结束再做评估， 超过150人的校园活动将被取消或推迟。
• 伯克利音乐学院：春假期间前往某些州和国家旅行的学生，返校后必须进行14天的自我隔离。

https://cdn.indeededu.com/uploads/2020/03/hand0311-1-768x432.jpg 768w, https://cdn.indeededu.com/uploads/2020/03/hand0311-1-1030x580.jpg 1030w, https://cdn.indeededu.com/uploads/2020/03/hand0311-1-705x397.jpg 705w, https://cdn.indeededu.com/uploads/2020/03/hand0311-1-450x253.jpg 450w, https://cdn.indeededu.com/uploads/2020/03/hand0311-1.jpg 1205w" data-sizes="(max-width: 300px) 100vw, 300px" sizes="(max-width: 300px) 100vw, 300px" srcset="https://cdn.indeededu.com/uploads/2020/03/hand0311-1-300x169.jpg 300w, https://cdn.indeededu.com/uploads/2020/03/hand0311-1-768x432.jpg 768w, https://cdn.indeededu.com/uploads/2020/03/hand0311-1-1030x580.jpg 1030w, https://cdn.indeededu.com/uploads/2020/03/hand0311-1-705x397.jpg 705w, https://cdn.indeededu.com/uploads/2020/03/hand0311-1-450x253.jpg 450w, https://cdn.indeededu.com/uploads/2020/03/hand0311-1.jpg 1205w" /> 图源：freepik

此外，求真小编已整理了一份校园疫情速递（更新至当地时间3月10日），以便于广大留学生关注美国大学预防疫情举措：

1. 在校课程改网课的院校：

Columbia University: 03/09~03/10

Cornell University

Everett Community College

Fordham University 03/09~03/29

Lake Washington Institute of Technology

Ohio State University ~03/31

Princeton University 03/09~03/23

Rice University

Stanford University

The University of Washington- Seattle

University of California- Los Angeles ~04/10

University of California- Berkeley: ~03/30

University of California- Santa Barbara

Vanderbilt University : 03/16~03/30

• 目前在校课堂仍正常运作，网课系统研发中的院校：

Harvard University: 3/23 (Spring) 开始停课

Rutgers University : 3/23 (Spring) 开始停课

University of California- San Diego: Spring开始网课

University of Southern California: 3/11~3/13测试网课

• 部份课程取消的院校：

Yeshiva University: Beren and Wilf campuses class canceled

留学生该如何应对

新冠疫情在美国境内扩散蔓延，留学生在特殊时期需要保护好自己。求真小编建议做到以下几点：

1. 注意自身防护，加强个人健康监测：勤洗手，勤消毒，多通风，尽量避免去往人流密集的地方。如出现发热、咳嗽、呼吸困难等症状，请及时就诊。
2. 密切关注美国疾控中心发布的官方信息，不信谣，不造谣，不传谣，摒弃恐慌情绪。
3. 根据个人实际情况制定出行计划，入境时须遵守各国有关疫情防控规定。若启程前已出现疑似症状，请勿仓促出行，避免增加疫情扩散风险。
4. 留意学校关于疫情发展情况的官方信息，关注美国大学预防疫情的相关举措，随时准备调整自身学习计划。

求真教育

疫情当前，同学们在听从学校课程安排的同时，更重要的是关注美国大学预防疫情举措，做好防疫措施。自新冠疫情发生以来，求真教育一直密切关注疫情的发展情况，以专业的知识和能力，为广大留学生提供支持，与大家共克时艰。在此，我们向所有抗疫医护人员致敬，并向受疫情影响的同学提供留学申请方案补助，如有需要，请联系求真老师获取更多信息！

留学签证疫情影响最严重时，美国如何应对？

不少打算赴美留学的同学最近都在考虑这么一个问题，新冠肺炎病毒肆虐之下，还能顺利拿到签证按时赴美留学吗？申请 签证疫情影响 大吗？我们按照此次新冠肺炎疫情演变的时间轴一步一步进行梳理，力求给予正在保持观望的留学生家庭一个最清晰、最正确的应对策略。

早在2020年1月份，也是新冠肺炎疫情在中国最严重的时刻，美国大使馆宣布自2020年2月3日起，美国驻北京大使馆和美国驻成都，广州，上海和沈阳总领事馆纷纷暂停了普通签证业务包括免面谈申请的办理。同时，美国驻华使领馆也一样，仅维持有限的人员，美国方面也取消了大部分的来华航班。这导致需要赴美留学及工作的人员无法如期归美，事实上1月末已经不属于圣诞假期，多数学校、企业也早在1月中旬就需要学生、员工到岗，可以说受到影响的群体并不多。

而随着国内疫情得到控制，美国大使馆于2月底宣布重新恢复中国公民的赴美签证申请，同时各大航空公司也开始恢复之前关停的部分航班。从网站公布的受理时间上来看，目前最早的签证预约时间是3月12日。不同地区的预约时间有所区别，大家可以在官网上查看。

美国驻华各领事馆预约开放时间：

· 广州领区

   可预约最早时间：2020年3月12日

· 沈阳领区

   可预约最早时间：2020年3月12日

· 成都领区

   可预约最早时间：2020年5月4日

· 上海领区

   可预约最早时间：2020年5月19日

· 北京领区

   可预约最早时间：2020年5月20日

需要注意的是，可预约时间会根据预约人数而变更，同时也不排除领事馆随时修改预约时间的可能，所以请需要签证的同学们尽早预约。

疫情对于留学的影响，虽然现在很难有定论，但是有一些趋势和分析可以帮助大家进行下一步的规划与准备。

美国高校是否会因此不录取中国学生？

其实大家无需慌乱，即使在之前的中美贸易战过程中，美国总统特朗普也明确表示，美国永远欢迎来自中国的留学生。目前正值美国春季学期开学时间，对于大多数学生来说影响不大，而秋季开学则在每年的8～9月期间，相信届时 签证疫情影响 已经得到控制，不会影响学生正常入学。美国各大高校也在首页发出公告，会针对受到疫情影响的留学申请给予一定的宽限期，希望广大学生放心申请。

全球抗击疫情的同时，签证政策又将如何变化？

随着境外确诊病例逐日增加，加州大学洛杉矶分校、华盛顿大学、康奈尔大学等美国高校宣布停课。能不能申请留学签证这个问题似乎变成了该不该申请留学签证，毕竟国内各地纷纷传来疫情零增长的好消息的同时，国外疫情好像加重了。求真教育希望提醒大家，随着各国开始重视新冠肺炎病毒以后，恢复正常上学、签证只是时间问题，需要准备的材料、考试一样都不可松懈。每年的6、7月份是留学生集中办理签证的时候，就现在的信息来看，预计今年暑假学生签证不会受到很大影响，但具体情况还是要看那时国外 签证疫情影响 是否能得到有效控制。

求真寄语

相信六月份左右全世界的疫情都能得到有效的控制，担心签证、考试准备不够充分的同学可以提前联系求真教育，我们拥有丰富的签证办理和留学申请经验，针对此次疫情我们也精心准备了许多应急方案，力求帮助每一位留学生顺利出国留学！

这个冬天格外寒冷，街道上也前所未见的冷清。新冠病毒疫情扩散以来，我们每个人关注的焦点都是与之相关的新闻。在这样压抑的氛围中，卫健委在2月18日发布了一个好消息：全国除湖北以外的新增病例达成“14连降”，冰消雪融，疫情拐点或在不远的将来。

我们每个人的生活都或多或少因这场疫情而发生了改变。商铺关闭、人们在家隔离、学生停课、医护人员化身“白衣战士”、各方倾力支援……

对中国留学生来说，2月无疑是纠结的一个月，受疫情影响，美、澳等国颁布禁止入境政策；2/3月中国考区的雅思、托福、GRE、SAT等重大考试也相继宣布取消；但这同时也意味着申请者有更充足的备考时间。同时也有一些暖心的消息：美国不少大学为中国学生开辟了特别通道、提交成绩截止时间有一定程度的推迟、duolingo在线测试可以暂时当作托福的备选项等；因此大家一定要关注自己学校发布的政策、及时联系校方。

“其实大家无需慌乱，即使在之前的中美贸易战过程中，美国总统特朗普也明确表示，美国永远欢迎来自中国的留学生。目前正值美国春季学期开学时间，对于大多数学生来说影响不大，而秋季开学则在每年的8～9月期间，相信届时疫情已经得到控制，不会影响学生正常入学。”

可以说，留学生们焦急地企盼着这场战“疫”的胜利，确诊人数增速减缓、治愈病例越来越多……关于战“疫”一个又一个好消息不断地鼓舞着我们，令人信心满满。我们深知，这些“战果”都是前线和各地医护人员争分夺秒换来的生命之路。
根据中国疾控中心2月17日报告显示，共有3019名医务人员感染了新型冠状病毒（包括确诊病例、疑似病例、临床诊断病例及无症状感染者，其中确诊病例1716名），该数据中可能存在非职业暴露造成的感染。

这不是冷冰冰的数字，而是鲜活的人；也许昨天这些人还在一线抢救病人，今天就不幸被感染，自己隔离、与病魔抗争。在这场规模空前的对抗病毒的战斗中，全国成千上万名“白衣战士”们冒着生命危险扶大厦于将倾，拯救人民于危难。他们有的献出了宝贵的生命，有的失去了健康，有的无法与亲人团聚，就是这样他们被誉为“最美逆行者”，谱写着一首首生命的赞歌。图源：新华社丘吉尔曾经这样评价英国皇家空军：“在人类征战的历史中，从来没有这么多人对这么少人，亏欠这么深的恩情。”这句话现在看来，再适合中国的白衣战士不过了。他们为了14亿国人的健康，用生命在战斗；说是用生命扛起了14亿人也不为过。图源：钧正平工作室近日医护人员的睡姿流传到了网上，令人心疼又肃然起敬，他们最大限度压缩了自己的休息时间，只为能从疫魔手中抢回更多的生命。

这些照片一次次地提醒着我们，白衣天使，不过是普通人披上了战袍。他们学着前辈的样子，和死神抢时间……此次此刻，纵有千言万语，也无法表达心中的敬意，也只有一声“谢谢”，谢谢您们的辛苦付出！

求真教育对无私奉献的医护人员致以最高的敬意与谢意，除了关注疫情和及时联络捐赠，还希望能用自己的方式来表示感谢，面向所有受到疫情影响的学生，提供更便利、更优质的留学方案，更向全国奋战在抗疫第一线的医护人员们致以最高的敬意！

留学申请方案

即日起至2020年3月31日，签约求真教育VIP本科/美高/美研/转学申请方案最高可获得20000元盛惠；

另外，所有成功签约客户均可获赠美国入学大礼包并免费提供延期入学指导。

*名额有限，全国一线医护人员子女优先享受最高优惠！

高考“双保险”

即日起至2020年3月31日，凡高三在读学生签约北美名校直通车申请方案，仅需1999元/所，零基础申请，高考前拿到offer，高考后自由选择。

学术辅导方案

即日起至2020年3月31日，签约学术辅导、学术管家方案均可获赠10节一对一辅导课程及签证辅导方案。

辅导老师均由美国名校毕业，拥有丰富教学经验，部分课程提供美籍辅导老师。辅导范围覆盖全美各专业课程，辅导老师会针对每一位学生的学术情况进行摸底评估，制定符合学生个人情况的定制辅导方案并且全程提供课程监督、管理服务，确保学生稳步提升。

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求 真 寄 语

留学生小伙伴无需焦虑，美国大学依旧欢迎中国留学生并且已经作出相关调整与利好措施。相关的考试、签证虽然在暂停中，但待疫情结束后将全面恢复正常。我们相信没有一个冬天不可逾越，在医护人员和各方的共同努力之下，春暖花开的那一天会早日来到。感恩白衣战士，铭记每一份无私的付出。

随着新型冠肺病毒的蔓延，美国留学疫情已经拉响警报，纽约州、华盛顿州、加利福尼亚州等多个地区例如已经进入紧急状态。受到疫情的影响，美国不少大学宣布停课数日，实施网课教学。例如加州大学伯克利分校、斯坦福大学、南加州大学、加州大学洛杉矶分校等名校都开始进行网课教学。求真教育建议各位学生，疫情严重期间避免大型聚会，少去人流密集的地方，在家做好防护措施。现在，求真将为您通报加州地区知名大学，在疫情期间学校的各个状态！

加州大学伯克利分校

目前，加州大学伯克利分校暂无学生或者教职员工感染新型冠状病毒。加州大学伯克利分校宣布学校已取消面对面授课，直到3/29恢复正常上课。同时，加州大学伯克利分校取消了大型集体活动。求真教育提醒学生，学校恢复上课后，学生需做好自我防护措施，勤洗手、保持社交距离和良好的呼吸卫生习惯，尽量不与身体不适的人有过于亲密的接触。

斯坦福大学

斯坦福大学官员宣布，一名在诊所工作的教职员工的新型冠状病毒检测结果呈阳性。目前，斯坦福大学已经把所有课程都转换为网课教学，并且取消了2020春季国际留学项目。斯坦福大学同时也实施了旅游限制，并且取消了一切学校大型活动。斯坦福大学位于加利福尼亚州的圣塔克拉拉县，是加州疫情较为严重的地区，求真教育建议学生在美国留学疫情较为严重期间少出门，时刻关注美国留学疫情时报，提高个人防护意识。

南加州大学

南加州大学暂无暂无学生或者教职员工感染新型冠状病毒。由于南加州大学位于洛杉矶的市中心，是疫情爆发较为严重的地区，因此南加州大学决定从现在起至3/29,学校改为网课教学。南加州大学呼吁学生在疫情严重期间，不进行任何出境旅游，以做好自我保护。求真教育提倡学生在疫情爆发较为严重的地区，可以准备好足够的粮食，减少外出用餐的可能，确保食品安全。

加州大学洛杉矶分校

截止到目前，UCLA暂无学生或教职员工感染感染新型冠状病毒。为了控制疫情的蔓延速度，UCLA也决定将所有的课程和期末考试转至网络授课与考试，直到4/10。同时，UCLA取消了所有超过100人的大型活动，以确保学生的健康。求真教育在美国留学疫情告急期间，为所有学生提供了在线的专业学术辅导，例如数学、经济、化学、生物等热门课程。不仅如此，所有有医护人员的家庭的学生，求真为他们提供了最优惠的学术辅导“套餐”，在此，我们向所有在疫情期间付出的医护人员致敬！

加州大学圣地亚哥分校

UCSD暂无学生或教职员工感染感染新型冠状病毒。为了及时控制新型冠状病毒，UCSD决定从2020春季学期起，所有课程将通过Zoom平台对学生进行授课。学校的实验室也将暂时关闭，以避免大量人流聚集。在美国留学疫情迅速蔓延的趋势下，求真教育提议，学生应保持健康的生活习惯，提高免疫力，密切关注自己的身体状况，提放感冒或流感症状的出现，如有不适，请及时就医！

加州大学圣塔芭芭拉分校

圣塔芭芭拉地区目前暂无学生或教职员工感染感染新型冠状病毒。加州大学圣塔芭芭拉分校现已停课，并实施网络授课，学校最早将于四月底恢复面对面教学。圣塔芭芭拉作为加州最热门的旅游景区之一，求真教育建议学生减少出门次数，出门回家后勤洗手和衣物，保持生活环境干净。同时，在美国留学疫情如此危急的情况下，求真教育呼吁学生可以保持理性，停止谣言和歧视。

求真寄语

美国留学疫情日渐险峻，求真教育将同步为学生留意各个学校最近的授课情况。根据病毒的传播性，我们应一起为抗“疫”行动努力。同时，求真教育就已联络武汉大学驻大纽约地区校友会并认捐1000枚N95口罩支援武汉。我们热切地在疫情之战中大家可以加强自我防护措施，保护好自己。求真教育与你一起，打赢这张战“疫”。最后，求真团队向所有在一线忙碌和奋斗的医护人员致敬！