Mobile phone bga ic welding and troubleshooting skillsZhu haiqingSelection of a tin planting Tool
1. Tin planting BoardCommercially available tin planting boards are generally divided into two categories: one is to make all models on a large connected tin planting Board; the other is a board of each IC, the two plantingThe tin board is used in different ways. The method of using the connected tin pad is to print the tin paste on the IC, then pull th
This article was originally published in my technical blog at javaeye.
One of the 12 table tennis balls (or gold coins) is a defective item. The weight is different from that of other balls (but I don't know whether it is light or heavy, it can be called several times to see which ball is a bad ball.
This question was published on the BBS of the University a long time ago. I cannot find it, and it is not
feature of the TSOP memory encapsulation technology is that the pin is made around the encapsulated chip, and the TSOP is suitable for mounting cabling on the PCB (printed circuit board) with SMT Technology (surface Mount Technology). TSOP package dimensions, parasitic parameters (the current greatly changes, causing output voltage disturbance) reduced, suitable for high-frequency applications, the operation is more convenient, high reliability.7. BGA
Altium designer BGA fan out 2012-02-28 14:52:06 share:First, Altium Designer has known for so long, did not use his automatic fan-out function, today, a try, the effect is good, but now has not found not fan out no network pin method, I now talk about my automatic fan out step to everyone to say, in the BGA above the right click, Select Component Atcions then select Fanout Component, this is a dialog box wi
1. There are 8 balls of the same size and color. One of them is different in weight from the other 7. At least a few times, it determines whether the ball is light or heavy.
Warm-up questions
There are eight balls, one of which is slightly different, and it knows that it is slightly lighter than the other seven, and the other seven have the same weight. Now there is only one balance, but there is no weight,
today to see an interesting topic, heard is "The beauty of programming" in a problem, instantly feel that they are a lot behind. Take out today and share my insights on this topic! The original problem: a bucket with 100 black balls, 100 white balls. Take the ball in the bucket in the following order:1. Take out 2 balls at a time;2. If the same color ball is put
An interesting smart question: given 12 balls of the same size, only one ball has a different weight from other balls. How can we use tianyao to name it three times to find the unique ball, in addition, it is determined that the emphasis is light or not.
Number the ball, 1 ~ 12. extract 1 ~ The 4th ball is a group of A, and 5 ~ The ball on the 8 th is a group of B, and the remaining 9 ~ The ball on the 12
Put 2N balls in M boxes (NM) so that the number of balls in each box is even By: LuoWeifeng2011-3-16 yesterday a MM (old table) asked me a simple algorithm design questions. The question is simple, but the simpler the question, the more challenging it is. Toiterateishuman, torecursedivineL. PeterDeu
Put 2N balls in M boxes (N = M) so that the number of
Someone asked: Is there one ball in the bag that ranges from 1 to 10? If you want to retrieve three balls, do you have the chance that any two balls in the bag will not be connected? The invitation month took a try today. The algorithm is very general. We are looking forward to communication.
The approximate algorithm is a three-tier loop. One Ball is taken out first, and then any one is taken from the rema
[Probability] m balls are thrown into n boxes, and n balls are placed in m boxes.Problem description
There are m balls, which should be thrown into n boxes. Each ball is independent of each other. Q: How many boxes have balls on average?Problem Analysis
This type of question is purely a mathematical question. Of course
Labeling Balls
Time Limit: 1000MS
Memory Limit: 65536K
Total Submissions: 11256
Accepted: 3230
DescriptionWindy have n balls of distinct weights from 1 unit to N units. Now the he tries to the label them with 1 to N in such a by that:
No. Balls share the same label.
The labeling satisfie
51517860Many times we need to combine material balls with the same shader to reduce the drawcall. For example, in the Kowloon War, a character with 10 parts, 10 parts of each from different FBX files, plus the body, there are 11 of material balls, accounting for 11 drawcall. If there are 10 characters running in the main city, the light figure takes up 110 drawcall! So the material ball merging is necessary
Dou Fish TV fish balls to make money mainly through other people send gifts, and then gift you can exchange into 100 fish pill, and then 100 fish balls = 1 cents, so we will be in this way to exchange on it, the specific I still for you to introduce a detailed.
First, fish bucket gifts
There are a lot of gifts to be given to the host in the fight Fish TV, some of which cost shark's fin with fish
Kyoya Ootori have a bag with n colored balls that is colored with k different colors. The colors is labeled from 1 to K. Balls of the same color is indistinguishable. He draws balls from the bag one by one until the bag is empty.He noticed that he drew the last ball of color i before drawing the last ball of color I + 1 For all i from 1 to K -1. Now he won
Public voidCrash (Graphics g) {}}After creating the small ball, we need to thread to create the ball, change the ball, there is also a problem, we are using one thread or two or more? This way, if only one thread, then we have to change the ball in the creation of a small ball, if the number of smaller balls is not a problem, but when the number of balls, every convenience will be used for a period of time
Python data analysis: two-color ball statistics of which combination of red and blue balls is high, python Data Analysis
This article describes how to calculate the ratio of two red and blue balls in a two-color ball statistical method based on Python data analysis. We will share this with you for your reference. The details are as follows:
Count the combination of two red and blue
Lightoj 1317 throwing Balls into the baskets (expected) Problem solving reportTitle Link: Http://acm.hust.edu.cn/vjudge/contest/view.action?cid=88890#problem/ATopic:DescriptionYou probably has played the game "throwing Balls into the basket". It's a simple game. You had to throw a ball into a basket from a certain distance. One day we (the Aiub Acmmer) were playing the game. But it is slightly different fro
Last week was an algorithm topic, the topic is: There are 10 small balls, the appearance of the same, of which 1 balls and other 9 ball weight is different, please use the balance to find the minimum number of times the weight of the ball.Problem-solving ideas: In fact, this is a very typical use of the partition algorithm example, because do not know this particular ball is heavier than other
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