择PCB板材必须在满足设计需求和可量产性及成本中间取得平衡点。设计需求包含电气和机构这两部分。通常在设计非常高速的PCB板子(大于GHz的频率)时这材质问题会比较重要。例如，现在常用的FR-4材质，在几个GHz的频率时的介质损(dielectric loss)会对信号衰减有很大的影响，可能就不合用。就电气而言，要注意介电常数(dielectric constant)和介质损在所设计的频率是否合用。
上传时间： 2017-04-29
上传用户：VRMMO
This volume is an instructor鈥檚 manual for the 4th edition of Database System Concepts by Abraham Silberschatz, Henry F. Korth and S. Sudarshan. It contains answers to the exercises at the end of each chapter of the book.
标签： instructor Database Concepts Abraham
上传时间： 2017-04-29
上传用户：manking0408
he basic idea of the method of bisection is to start with an initial interval, [a0,b0], that is chosen so that f(a0)f(b0) < 0. (This guarantees that there is at least one root of the function f(x) within the initial interval.) We then iteratively bisect the interval, generating a sequence of intervals [ak,bk] that is guaranteed to converge to a solution to f(x) = 0.
标签： bisection interval initial method
上传时间： 2017-04-29
上传用户：zsjinju
Linux socket programming delves into many particulars of network programming. It is organized into five specific parts: network programming from the client perspective, The Server Perspective and Load Control, Socket objects, advanced sockets.
标签： programming into particulars organized
上传时间： 2014-01-19
上传用户：xjz632
servlet api全解 This document is built from the HTML documentations available at java.sun.com. It is regularly updated, when new versions of original documentations become available. To download updates and many other WinHelp and HTMLHelp Java documentations for free, visit Franck Allimant s web site : http://www.confluent.fr/javadoc/indexe.html (in English) http://www.confluent.fr/javadoc (in French)
标签： documentations available document servlet
上传时间： 2013-12-14
上传用户：784533221
nios cpu test code this code was generated by altera tool automatically. You can obtain this code from the SOPC builder
标签： code this automatically generated
上传时间： 2014-05-30
上传用户：ddddddos
This algorithm is to count the dark colored pixels in the input image. This can be used in goods sorting like rice, paddy etc... in paddy or rice or other goods or products to sort out the bad or defect one we can use this algorithm. I had done this for my Masters Degree as a small part and now i am releasing for you. rajesh.f, Kanayakumari district, India. contact me: rajesh1983jan10@yahoo.com
标签： This algorithm the colored
上传时间： 2017-05-02
上传用户：liglechongchong
FastReport is reporting tool component. It consists of report engine, designer and preview. It written on 100 Object Pascal and can be installed in Delphi 2-7 and C++Builder 1-6. Also available cross-platform version FR CLX for Delphi 6,7 C++ Builder 6 and Kylix 1,2,3 - check out webpage to get latest information.
标签： FastReport component reporting consists
上传时间： 2014-01-20
上传用户：坏坏的华仔
HomePlayer is an extention of the FreePlayer software provided by the french internet provider Free (www.free.fr). It adds a lot of fonctionnality like harddisk browsing, meteo, tv program, etc. You can find more information on HomePlayer.
标签： HomePlayer FreePlayer extention the
上传时间： 2014-01-09
上传用户：wys0120
AlgorithmType: SymmetricCipher Name: AES/ECB Source: NIST Special Publication 800-38A Plaintext: 6bc1bee22e409f96e93d7e117393172a ae2d8a571e03ac9c9eb76fac45af8e51 30c81c46a35ce411e5fbc1191a0a52ef f69f2445df4f9b17ad2b417be66c3710 Comment: F.1.1 ECB-AES128.Encrypt Key: 2b7e151628aed2a6abf7158809cf4f3c Ciphertext: 3ad77bb40d7a3660a89ecaf32466ef97 f5d3d58503b9699de785895a96fdbaaf 43b1cd7f598ece23881b00e3ed030688 7b0c785e27e8ad3f8223207104725dd4 Test: Encrypt Comment: F.1.3 ECB-AES192.Encrypt Key: 8e73b0f7da0e6452c810f32b809079e562f8ead2522c6b7b Ciphertext: bd334f1d6e45f25ff712a214571fa5cc 974104846d0ad3ad7734ecb3ecee4eef ef7afd2270e2e60adce0ba2face6444e 9a4b41ba738d6c72fb16691603c18e0e Test: Encrypt Comment: F.1.5 ECB-AES256.Encrypt Key: 603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4 Ciphertext: f3eed1bdb5d2a03c064b5a7e3db181f8 591ccb10d410ed26dc5ba74a31362870 b6ed21b99ca6f4f9f153e7b1beafed1d 23304b7a39f9f3ff067d8d8f9e24ecc7 Test: Encrypt
标签： SymmetricCipher AlgorithmType Publication Plaintext
上传时间： 2013-12-17
上传用户：teddysha
