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The circuit diagrams and the definition of hardware interface of each module are given. Thirdly, the bootload is designed according to the address mapping of the PCB and the start-up procedure of ARM processor.

接着，通过对ARM处理器启动流程的研究，并根据电路板的地址映射，详细阐述了系统引导程序的设计思路，并给出了程序流程图。

Familiarize with the use of the Pads layout,attempt to study the Allegro layout.

今天主要是做"用到器件的封装，以及PCB的外框尺寸，定位孔大小等。。。。"

On the basis of electrical network characterization, Chapter 5 presents a new principle to detect PCB's fault first time. Three methods of online test for electrical network characterization are described in detail. Then, a hierarchical, combinatorial approach is firsfly presented. The test efficiency of this method is studied also. The experiment result shows that the new approach can greatly enhance the test efficiency of fixtureless tester under the requirement of 100% test for PCB's connections.

本文第5章利用集成电路的输出特性，首次提出了一种新的印刷电路板连接故障的检测原理，给出了三种印刷电路板电气网络输出特性的在线测试方法；在此基础上，首次提出并实现了基于飞针式在线测试仪的层式组合测试思想，研究了这种方法的检测效率；应用实例表明这种方法在不降低对印刷电路板连接故障100％测试的要求下，可以有效地提高飞针式在线测试仪的检测效率。

A novel kind of rectangle column monopole antenna is presented.The equivalent diameter of the antenna is thick due to the double rectangular radiation plates connected with the metalized holes.

一种PCB柱形接地单极振子天线，通过利用PCB双面板的特性，制作出一个双面柱形振子天线，增加了天线的等效直径，展宽了天线的阻抗带宽。

In one embodiment of the present invention, the optical fingerprint sensor includes:(1) a light source on a PCB assembly,(2) a diffuser that receives light from the light source,(3) a right angle prism that receives light from the diffuser,(4) a collimating lens that receives light from the prism,(5) a first mirror that receives light from the collimating lens,(6) a second mirror that receives light from the first mirror,(7) a third mirror that receives light from the second mirror,(8) an imaging lens that receives light from the third mirror, and (9) an image sensor on the same PCB assembly as the light source that receives light from the imaging lens.

在本发明的实例中，该光学指纹传感器包括有：①一个装在印刷电路板上的光源；②一个散射镜接收从光源发出的光；③一个直角棱镜接收从散射镜出来的光；④一个准直透镜接收从棱镜出来的光；⑤第一块镜子接收从准直透镜出来的光；⑥第二块镜子接收从第一块镜子出来的光；⑦第三块镜子接收从第二块镜子出来的光；⑧一块成像镜接收从第三块镜子出来的光；⑨一个与光源安装在同一块印刷电路板上的图像传感器接收从成像镜出来的光。

When manufacturing PCB, the drill pin's quality is an important factor to ensure the PCB's eligibility.

在印制电路板制造过程中，钻针的质量对于保证所钻电路板的合格性起着非常重要的作用。

CNC CNC drilling and milling machine used in PCB drilling and milling industry, processing, testing and PCB jig mold precision drilling.

CNC数控钻铣机应用于线路板行业的钻铣加工、测试治具及线路板模具的精密钻孔。

Experimental results indicated that the contaminants generally existed in mussel, such as α-HCH,β-HCH,γ-HCH,δ-HCH, o·p-DDT, p·p-DDT, p·p-DDD, were degraded completely under the above conditions, whereas DDE, aldrin and dieldrin were partly degraded. No detectable degradation of PCB 1242 and PCB 1248 were observed. Thus the conventional preparation of the contaminants using the columns packed with Florisil or SiO〓 could be left out.

测定贻贝中的PCBs时，以KOH甲醇溶液处理试样，在微波能作用下，试样的微波皂化与有机氯农药的微波碱解同时进行；测定土壤和沉积物中的PCBs时，以KOH甲醇溶液处理试样，在微波能作用下，PCBs的微波萃取与有机氯农药的微波碱解同时进行，1M KOH甲醇溶液对PCBs的微波萃取能力与纯甲醇溶剂相当。

Company, modified and improved the failure of the system. familiar withthe single / double sides, multilayer, blind / buried holes, carbon, plugholes etc. Awealth of experience of analysing anomaly for quality,improvement and prevention, use various types of quality control methodto regulate the product quality.3. Be able to skillfully use the seven QC practices, IE seven practices

熟悉PCB行业的相关标准和系统化管理，能结合公司整体系统运行情况和实际生产的需求，对失效的系统进行修改和完善；熟悉PCB单/双面、多层、盲/埋孔、碳油、塞孔等工艺制程，对品质异常的分析、改善和预防有丰富的经验，能熟练运用各类品管手法对制程品质进行管控。

For example, we addground patch on the MIC PCB board and ground cable on the Front PCB board toreduce the disturb of conduction.

例如几款机器均在 MIC 板上增加接地片、前面板上增加接地线来消除或减小传导干扰。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新