Les paramètres d'efficacité des PCB sont soigneusement associés au processus de production des PCB ainsi qu'aux exigences de conception et de style des concepteurs de PCB. Parmi les nombreux paramètres des PCB, l'effet principal sur la méthode de placement est constitué par ses paramètres géométriques, tels que la planéité de l'ensemble du PCB, les tolérances d'ouverture du PCB, la méthode de traitement du sol de votre PCB et d'autres facteurs d'impact, qui peuvent être mentionnés ci-dessous.

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1. Planéité

Selon les caractéristiques de votre PCB ainsi que la méthode de production, nous savons qu'il est collé et serti couche par couche, le cours d'action de fabrication aura la tension, ainsi que la couche de pad avec le centre dans la couche d'isolation électrique de différents produits et l'épaisseur, donc le coefficient de dilatation thermique est en outre unique, et donc tandis que dans l'emballage et le cours d'action de transport, le PCB peut bien être déformation plastique de flexion (Bow) ou de torsion (Twist), le diplôme de la déformation plastique impliqués avec toute l'épaisseur et l'espace sur le PCB et sa structure de couche de carte est symétrique.

La valeur admissible de la durée du circuit imprimé est de 0,75 %, c'est-à-dire (L ?á 0,75 %) mm, mais la valeur maximale ne peut pas dépasser trois cent soixante-quinze mm.

Si la planéité dépasse la plage admissible, la forme du point de référence dans la caméra s'améliorera, par exemple, un point de référence rond normal deviendra elliptique dans la caméra numérique, ce qui peut entraîner une modification de la lecture de la longueur moyenne entre les facteurs de référence, ce qui peut affecter l'emplacement des patins de l'ingrédient sur le PCB en ce qui concerne les détails de référence, et peut donc déclencher instantanément le détachement de l'ingrédient. En outre, en raison du gauchissement avec le PCB conduira à des parties à l'intérieur de la méthode d'urgence vers le bas par rapport à la pâte à souder à la garniture de glisser, ou le fond de la partie pâte à souder pressé absent, d'où la formation d'une perle ou direct à des facteurs adjacents pont circuit rapide.

2?￠L'impact de la tolérance de production

Les tolérances de production du PCB auront même un effet sur l'excellent placement, principalement à l'intérieur du diplôme de contour du point de référence (Fiducial) et de l'écart de degré de placement, comme pour le PCB sur d'autres erreurs, ces types de comme en excès de trou produisant des tolérances auront immédiatement un effet sur est la soudure juste après l'efficacité électrique, mais cela n'appartient pas vers l'affect à la colleuse.

3?￠Méthode de traitement de la surface

La méthode de traitement de surface pour cet impact de placement, incarne surtout dans dans l'étape de référence (Fiducial) l'élément de protection, il peut influencer surtout pourrait être le processus d'impression visuelle peut être précis, l'étape de référence de reconnaissance rapide. Le principe de base essentiel est que la couche de réserve de soudure ne peut pas dépasser la position de référence et la région de résolution auxiliaire qui la borde.

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Thought people have been asking me that we can show us information about the lamp you are growing, what else is not the best, what is the best use and what, so I will try to do this now, I just To show you which one I use, and others, so I am using VANQ T8, which basically refers to those tubes that are only thin fluorescent tubes, and I have one. There is a remote control lamp on the 4-foot-long tube. You can make them in various sizes. You can use 8 test tubes to set their length to 4 feet, and mine is longer than 2 feet. There are also remote control tubes, as you can see, it heats me and the tube above, but they don’t burn anything. You can place the plug as close to the top as possible to really show that if there is no heat and all energy is ignited, then there is only a 524 watt light bulb, so only 96 watts. I think this is 448 hours. How efficient is it? Tile pipe, so it is 200 watts. Considering how much you can grow under them, I will say that this is T8, and I will give you an idea. I have a light meter, I take it outside to show you something.

Try to do it. This is a place that let me put the luminometer 6 inches below the luminometer, you can put the top of the bulb in it, you are actually reading a book, or reading there 20,000 or 20,000, put 6 at the bottom The inch can read about 111,000 lenses, which may be better. Let CERN sit there 26,000 inches and then lower it a little bit, so I take it outside and I will show you the kind of light you want to take outside, so I am in the greenhouse. This is a gloomy winter, because there is not much sunlight there, so this time I just want to tell you, what is the intensity of the light? Here, you like me to point it to the sky. It is 35 times 100, so it has about three thousand five hundred lumens, so you can see that it is four times as large in the sun and hot, and it can reach 89,000 in the sun and in the summer sun. I can say that in winter, you will get three thousand at this time, so I want three thousand. Therefore, it is not very good compared to indoors, so you can see it from outside, there are only more than 3,000 outside. I have about 22,000 here, which is about 7 or 8 times the brightness, so if you see it at the bottom, they will only get 10,000 appearances-the lettuce there grows perfectly, like I said, They are indeed doing something. Because they don’t emit too much heat, they emit a lot of light, so you can place plants near the bulb. Now, another thing you need to consider is that you need to reflect as much light as possible to return To the work you have done If you really don’t want to waste anything on the plant, I put a white poster there to reflect a little, and then on the wall, I forgot this thing.

Diamond embossed polyester film is a professional film, you can use other things, obviously not, it is recommended not to use tin foil, because tin foil may cause hot spots, because tin foil cannot reflect other things correctly, obviously, we can’t do it To this point. For polyester film, just use a flat latex white cushion. Like I said, the blunt pen is just a flat emulsion. If I draw a tent in white latex and tap the light on the wall, or if I can think of one of the barbecue temperatures, then these hydroponic fluffy tents are like not saying I don’t shine, but touching your wall . All weeders use their ideal material, because they are actually covered by polyester film, so you will also make the most of all the light, so just like the T8 I said, they come in a variety of shapes and sizes, which are perfect for five feet each One foot in a small room, you will grow up in an area of about four feet to two feet, so you only need to buy shoes that fit your size, and now show you another shoe to get a replacement product once used One made by myself, one by someone looking at it, actually I just knocked it, so I used to put some chili, pepper and tomatoes on the windowsill. It's too small, you can watch it again, so you can grab all the unread bulbs, they are only 30 watts, while the compact fluorescent bulb is only 30 watts, it can emit about 150 watts of light. You can do it, we look like it is about 60,000 inches, so actually T8 lamps are not expensive, these bulbs are only about 4 pounds, you should put them in a small hangar, they are perfect for all peppers and tomatoes On the windowsill. Obviously, a cover is placed on the back cover to reflect the light back, but as I said, there is now a modern way to change the cat. This is what I used in the past. Probabilistic method You can’t say this before T8, just like giant compact fluorescent lamps, their power is about 150 watts, and the power will rise to 200 watts. The problem is that each of these bulbs is about 25 Ude, and they don't actually pop out.

The test tube I used in T8 has only changed a little. They can be replaced as long as they enter the door. These tubes are expensive, and they are also very expensive. The weather is very hot, so you can't put plants next to them, because in your small area, you have a reflective protective cover that can reflect the plants. I found that they don’t provide enough area like T8tube, but I mean, if you can’t get any other benefits, then they are as good as anything else, and the other thing without a charging stick is LED, which actually It's just a fan that can be inserted into a single blind. You can't say that it is absolutely blinding. It is 18 watts. I tested this and it has appeared about 15,000 times. I turned it around because it made me invisible, only eight cents, we saw its size, it heats up any heat, because it is so effective, all the energy is emitted, so we are doing The thing is to hang these onions tightly between me, because like I said, they don’t have any heaters, so they don’t have a burning feeling, but then you know that the places worth trying have exactly the same frequency spectrum, this is The 6500 K you are looking for, which is 6500 K Kelvin, I think I didn't mention it. Before that, it was actually the blue spectrum of the cool white spectrum. If you get another kind of light, the flower that people want to use is 2700K, then the spectrum is what you need to grow nutritionally, so you really don’t want it to start from fruit, and then you want vegetarians to use 6500K or cold White spectrum bulbs, which are all kinds of ever-changing types for me, and I use bulbs made by myself, as I said, if you like these bulbs, then these big T8 bulbs will let you Feeling satisfied, you can have a meal like this, you can grow rice and grow about 20 kinds of pepper plants, and happily grow 22 kinds of plants under this plant, they become very busy and prevent them from growing on the windowsill, or you You can choose one of them, or like I said you can go there for lighting, but in any case, you need more space, because there are only a few different ideas for indoor lighting, looking forward to your plants.

Hi everyone, my name is Ken. This is our electronics expert this week. He has 300 closets, mainly because we have a bunch of leaves to peel off. As you can see, we have many families and they are becoming more and more important. They cover many high-quality coke plants. If I need more light intensity, these families can certainly bring us more benefits, so we will continue to delete those families that are useful in some ways.

I will discuss in this article and start peeling or trimming the plant to ensure that the lower part of the plant gets enough light to stimulate blood formation. Usually the smaller buds are completely removed, so all the growth hormone of the plant is concentrated in the cola part at the top. Increase production. Falling leaves and popping lollipops allow more air to pass through the plan to reduce problems such as PM and pests. I like to remove everything by hand. When they bend to the roots, the leaves fall off easily, so I find it is better to use it than Fiskars. The best time for heavy peeling is faster. For example, in the first and fourth weeks of the initial flowering, since the plants have fallen leaves, I will provide them with some dechlorinated tap water to make their pH reach 6.8, let them recover for a few days, and then check the leaves. Seven days passed. These plants look great. Because the canopy plants under the lollipop are correct, the lower part of the cola has more light. Push all the energy to the top of Maine Coke, creating a big hole in these 8 or 2 closets. I planted eight plants in a half-gallon jar, and squeezed chocolate mint and black dog from an unremarkable seed. These tissues, as well as the severe Kush disease and LSD from Barney Farms, are new phenotypes that popped from the seeds.

I also obtained a clone of a grandparent, which is also here, I also obtained three clones of Nocookie at my own price, so if you follow this article, you will know that we just harvested a 5x5 battery and it was closed due to the quantity The new electronic device VANQ GLMX720, so I closed it for a few weeks, so I should continue to delete the old Mars Hydro and the old ZLED, and let me use these brand new LED Grow Light (new dimmer). Now you are not familiar with these LEDs. They have a power of 720 watts and consume broadband spectrum LEDs. The other cool thing to bring is the ribbons, because they have linear lenses that direct the intensity towards the canopy, and the device is passively cooled, so they have no loud moving parts, and none of these things are damaged now. I have two such VANQ720W planting lights in the woods in the closet, so you really want to know more about its performance, please check his website: vanqled.com, but more importantly, buy these lights with free shipping Cost, but hang them up and see how they look. Open it, I just want to say thank you for reading this article, I hope it is longer, I hope you have a nice Sunday, and I wish you a happy work.

作為翻譯愛好者，如何翻譯訓練?

在聽、說、讀、寫五種技能中，翻譯是最全面的。 翻譯能力的培養標准是“信、達、雅” ，翻譯能力的培養有三種方式，一種是從部分到整體，一種是從簡單到複雜，三種是從雜到專家。

一、“局部→整體”法

這種訓練方法是按照“詞→短語→短句→複句→段落→短文本”的模式，逐步訓練。

1、在學習英語單詞時，不僅要記住我們每個詞的“音形意”，而且需要掌握一些常見搭配和習慣用語。因此，不要選擇只附帶一個簡單分析漢語意思的詞彙書，附帶的內容越詳細情況越好。我的學習生活習慣是直接影響記憶《新英漢詞典》，上面的漢語意思就是非常齊全，帶有盡可能多的搭配和習語，以及典型的例句。

2，由短語詞組，在這個過程中的長句，需要有語法的堅實基礎，系統的語法規則和強大的能力來使用。 “英語語法的高級使用通行證”，譯者缺乏語法的系統知識的不成為高級翻譯只能徘徊在低端(更低端)。目前人工智能翻譯軟件，一直是中低端替代解釋，最大的好處就是詞彙的大量人工智能翻譯，但有兩個致命傷，因為語法混亂，“分裂錯誤”當一個人閱讀的原始發生，造成誤解;第二個是當組織要求，也不好靈活調整語序，低級別的語法錯誤。如果你能戰勝“語法關”，翻譯水平的人工智能將有顯著跳躍，可以代替低端的翻譯。

二、“簡單→複雜”法

這種教學訓練管理方式的起點就是“句子”，只是所需要的詞彙量和語法理論知識比較初級，在不斷地提高訓練中，逐步擴充詞彙量，深入了解學習精深的語法規則，適合有一定影響語言文化基礎和翻譯專業知識的學習者訓練。

三、“雜家→專家”法

一種稱為聯合訓練的技術被用於迭代地推動英語到中文和漢英翻譯系統。通過這種方法，英漢翻譯系統將新的英語句子翻譯成中文，以獲得新的句子對。

譯者或解釋應該了解一下陽光下的一切。作為譯者，首先應該是一個“百科全書”雜家，擴大知識的廣度，通過讀各大新聞網站的英文，不同主題的知識，並要求多瀏覽器的信息技術，生活，財經，體育等類別主題。同時，一個人的精力是有限的，我們不可能做到樣樣精通。所有萬事通是萬金油。 “隔行如隔山”，在各種類別的基礎知識的掌握，你需要選擇自己擅長的領域，如電子，電信，石油，化工，冶金，建築，醫藥等，精度范圍內的一個或兩個區域養殖，培育專業性強的基礎上，向精細，在知識領域的資深翻譯不遜色於在該領域的專家。

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要成一名優秀英語口需做的事

提高你的公開進行演講活動能力。參加嚴格的演講課程。用母語和外語在他人面前進行練習寫作和演講。請讓你正在不斷學習數學語言的作為一個母語的人可以糾正你的演講。鍛煉你的分析能力。練習聽演講並口頭總結要點。實踐要點提煉新聞文章。

外語學習十大黃金秘訣

外語教育好比一個碉堡，必須進行同時從四面八方向它圍攻：讀報紙，聽廣播，看原文分析電影，聽外語講演，攻讀課本，和外國朋友以及通訊，來往，交談能力等等。

如何成為一名職業翻譯

教材內容方面，如果你能找到自己翻譯進行專業的入門教材也行，但最容易可以獲得的應該是 CATTI 的教材和練習冊。CATTI 考試系統分為綜合管理能力和實務兩個不同科目，前者以選擇題、閱讀題和完形填空為主，考察外語的綜合發展能力;後者考察雙語互譯。教材的設置和考試制度基本情況相同。建議非外語教育專業的學習者認真努力學習教材，尤其是筆譯實務部分。教材會介紹我們很多翻譯方法技巧，有一些翻譯實踐經驗再來學習會更有收獲。

女性存在哪些不同時期易長斑?如何祛斑?看看我們醫生怎么說

斑點總是女人的天敵，每個女人都希望能夠快速去除斑點，擁有一張潔白光滑的臉。 事實上，激光可以用來去除斑點，恢複女性的自信。

女性更加容易在哪些不同時期長斑點?

青春期皮脂腺分泌比較旺盛，炎症後色素沉著會出現平靜，稍有疏忽可能導致斑點的產生。長期缺乏睡眠，壓力過大會神經紊亂，導致皮膚色素沉澱腎上腺皮質功能下降，養殖斑點。在體內的雌激素和孕激素水平在妊娠期間顯著增加，影響生理功能，刺激色斑的產生。 40歲的女性進入更年期，卵巢功能衰退後顯著，但雌性激素缺乏可引起汙漬。

激光祛斑效果怎么樣?

1、有明顯的效果

可以說，激光祛斑是一種非常理想的方式，激光儀器會產生高強度的光束，不同類型的激光會產生不同顏色的光，會被不同顏色的皮膚吸收。 它主要利用激光的能量分解色素顆粒，密封血管，然後身體將染料顆粒直接吸收出身體，使色素慢慢褪色。 激光祛斑主要用於人體激光不會傷害皮膚，也不會產生副作用。 祛斑後不會留下任何疤痕，並能刺激膠原蛋白組織的再生，從而達到皮膚美容嫩膚的效果。 激光祛斑有一定的針對性，祛斑效果立竿見影，但祛斑後一周內要做好保養和防曬。

2、安全性高

激光祛斑是一種物理治療，不會給皮膚帶來傷害，而且准確。 激光發出的能量是可調節的，並有一個冷卻系統，確保其舒適性。 激光治療是非侵入性的，不會在皮膚下留下開放性傷口，治療不會留下任何疤痕。 而且有很強的滲透性，能徹底清除顏料，終身不會反彈。

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皮秒去斑儀器，採用蜂巢激光透鏡20倍聚焦能量，利用強大震盪波粉碎黑色素，瞬間震碎色斑、荷爾蒙斑，同時去凹凸洞及改善粗大毛孔，1個療程，改善4大肌膚問題！‧即登記尊享首次體驗價

必須要進行選擇一個正規的醫院做激光祛斑，祛斑之後要做好自己皮膚的護理。在秋天天氣情況比較不同幹燥過程中容易滋生色斑，必須要做好患者皮膚的保濕工作，多吃一些新鮮的蔬菜和水果，多喝水，減少學生熬夜的次數，保證有充足的睡眠，適當的鍛煉我們身體來加快發展全身的血液系統循環。激光祛斑後，每天都是需要通過擦拭消炎膏，這樣能幫助傷口的愈合，同時教師要注意皮膚的清潔，防止受到日光的暴曬。

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