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In this paper, the bump patterns for flip-chip packages are discussed first, then an experiment is setup to study the dispensing phenomena for different bump patterns, and the CAE software is used to analyze and identify with experiment mutually. From these thorough comparisons and analytical analysis, the existence of channel could slow down the flow, the high density of bump could speed up the flow, and it could avoid the air trap by modified the bump and channel's arrangement on flip-chip package. Then flows in rectangular microchannels driven by capillary force and gravity are discussed; furthermore, the theoretical model of flow in microchannel driven by capillary force and gravity is formulated from the Navier-Stokes equations.

本文首先针对覆晶底部充填进行相关理论推导、实验与模拟,探讨不同凸块配置模型所造成的波前不平滑现象对底部充填流动的影响;即依据相关参数建立模型进行底部充填实验,同时以CAE(Computer-Aided Engineering)模流分析软体进行模拟,在完成理论探讨、实验与模拟分析之后,交叉比较理论、实验与模拟分析结果,归纳出影响底胶充填流动之因素,由结果显示在凸块密集度较高的区域,凸块可以帮助流动,但是在凸块区后方的沟槽区域则因为凸块区所提供之流量不足,所以会造成波前落后的现象,另外藉由修改凸块与沟槽配置的关系,可以有效的控制波前形状的变化情形,避免产生包风现象。

The mechanism of PPS accelerating IEC-6 cells migration was also researched with gene-chip technique. The Altas Clontech Rat cDNA Chip which consisted of 1176 spots representing different functional categories such as heat shock/stress, cell cycle, transcription factors, hormones, metabolism, etc was used. Result showed in cell migration model of IEC-6 cell line, compared with control group, expression of 38 genes in total 1176 genes varied in cells treated by PPS, including 21 genes up-regulated and 17 genes down-regulated. Date analyze showed the mechanism of PPS accelerating IEC-6 cells migration mainly related with promoting the numbers and activity of cellular ion channel, especially 〓 channel.

从以上实验结果中我们可以得出以下结论:四君子汤总多糖具有促进IEC-6细胞增殖、迁移、粘附的作用;四君子汤总多糖无论是对IEC-6细胞增殖、或者迁移的作用均优于各单味药多糖,可能是各种单味药多糖综合作用的结果;多糖可能是四君子汤"益气健脾"药效的主要成分;小肠上皮细胞可能是四君子汤总多糖的作用靶点之一,提示临床采用四君子汤及"益气健脾"法治疗"脾虚证"的疗效机制可能与增强机体的整体免疫和肠道粘膜免疫功能有关。

So say American film society to sue fast thunder can additional purposeful, these year western country always censures China in intellectual property domain, because,force of fire of before a few years of Zhuhai is sued by SIGMATEL of provider of American MP3 chip also is intellectual property, the swift and violent development that real reason is Zhuhai fire force truly has browbeaten SIGMATEL, the intellectual property case that SIGMATEL prosecutes Zhuhai fire force also is absent MP3, and in domain of power source power comsumption, allegedly the period of time of to lodge a complaint, the client of force of many Zhuhai fire converts SIGMATEL, because,very simple everybody does not consider the matter the lawsuit ask for trouble of Zhuhai fire force, this just also is the real reason that SIGMATEL sues Zhuhai fire force, do sth over and over again prosecution of two years is Zhuhai fire force as a result eventually most reconcile in both sides of Shenzhen countercharge SIGMATEL, the judgement that the market share of force of final Zhuhai fire exceeds SIGMATEL to became the MP3 chip provider with the greatest whole world to also prove SIGMATEL is original and be anxious.

这么说来美国电影协会起诉迅雷只能另有目的,这些年西方国家总是在知识产权领域指责中国,前几年珠海炬力被美国MP3芯片提供商SIGMATEL起诉也是因为知识产权,真正的原因确是珠海炬力的迅猛发展已经威胁到SIGMATEL,SIGMATEL起诉珠海炬力的知识产权案也不在MP3,而在电源功耗领域,据说提起诉讼的一段时间,大量珠海炬力的客户都转投SIGMATEL,原因很简单大家都不想因为珠海炬力的官司惹火上身,这也才是SIGMATEL起诉珠海炬力的真正原因,折腾了两年的起诉最终结果是珠海炬力在深圳反诉SIGMATEL双方和解,最后珠海炬力的市场份额超过SIGMATEL成为全球最大的MP3芯片提供商也证实了SIGMATEL最初的判定和担忧。

With the same cutting parameters, same chip types can be gained in either the nodal zone or the internodal zone. In other words, the principles of chip formation are entirely the same in these two different zones.

在试验条件相同的情况下,对竹节部和节间材切削,会形成相同类型的切屑,即其切屑形成机理相同。

Capillary phenomena was studied and discussed by the scholars about 200 years ago, but the progress was slow due to the limited equipments and manufacture precision of the microchannel.In recent years, because of the rapid development of MEMS and micromachining, many applications of the capillary flow is widely developing in some modern processes, such as underfilling of flip chip, flow in microfluidic chip or biochip, and a variety of other fields.

摘要 毛细现象大约在200年前便断断续续被欧美学者所研究讨论,但由於当时微细加工受到仪器设备和制造精度的限制,因此发展极为缓慢;近年来由於微机电系统与微细加工之精进,许多具有微流道的应用设备,陆续被制作问世,加上光学显微镜与影像撷取设备的普遍,对於研究此课题的推展极有助益;且随著微生医、覆晶底胶充填与微流体系统等领域之受到重视,毛细现象导致的充填问题、驱动原理及液体流动的控制,都变得相当的重要;本研究基於如此的动机与目的,进行微流道内液体之毛细流动现象及时间的探讨。

A multiplayer chip LC resonator was fabricated using planar inductor and parallel plate capacitor. Because lumped inductor has small Q value and there is stray parameter effect in high permittivity substrate, the Q value of chip LC resonator is not high. Resonators based on λ/4 stripline with end short circuited were designed and fabricated. Input and output pads, coupled to the stripline using gap-coupling capacitor, are in the same layer with the center conductive strip. This new structure is very convenient for manufacturing in comparison with the conventional structure.

采用间隙电容耦合结构实现的谐振频率为1.8GHz四分之一波长终端短路带状线单端口谐振器的Q值最大值为225,谐振频率为1GHz双端口谐振器的Q值为83,谐振频率和Q值与耦合间隙、带状线的厚度和耦合引线长度有关;二分之一波长带状线谐振器的Q值和四分之一波长相比较尺寸较大,由于导电带较长,造成金属的损耗增加,从而导致谐振器的Q值较低;带状线结构的谐振器频率调节困难,本文提出了改变接地端的宽度实现谐振频率的微调方法,可实现频率调节量约1.5%。

This paper discusses in detail,from the selection of single chip computer to application system test,the problems in single chip computer system anti-interference design ,and presents with the help of diagraphs some design methods,which are summarized by the author in his teaching,and easy to learn.

文章以系统设计的角度,从单片机的选择到应用系统的测试,全面描述了单片机系统抗干扰设计中需关注的一些问题,并且展现出具体的方法措施。

The possibility of researching gene mutation with the technique of gene chip was discussed. A new imagination to randomly determine DNA sequence in different living beings with the technique of gene chip was advanced. In this way, whether the encoding sequence gene in DNA of eukaryon organism has some regularity was studied.

进而提出新设想——采用基因芯片技术对不同生物群体随机抽样进行DNA测序,从而探讨在真核生物DNA分子链上编码序列遗传基因的变化是否有规则而非随机的,非编码序列遗传基因是否为生物进化过程中曾经有表达能力的结构基因,并分析可能获得的结果。

Pinout: C High-performance 32-bit RISC Architecture C High-density 16-bit Instruction Set C Leader in MIPS/Watt C Little-endian C Embedded ICE (In-circuit Emulation) 8-, 16- and 32-bit Read and Write Support 256K Bytes of On-chip SRAM C 32-bit Data Bus C Single-clock Cycle Access Fully Programmable External Bus Interface C Maximum External Address Space of 64M Bytes C Up to Eight Chip Selects C Software Programmable 8/16-bit External Data Bus Eight-level Priority, Individually Maskable, Vectored Interrupt Controller C Four External Interrupts, including a High-priority, Low-latency Interrupt Request 32 Programmable I/O Lines Three-channel 16-bit Timer/Counter C Three External Clock Inputs C Two Multi-purpose I/O Pins per Channel Two USARTs C Two Dedicated Peripheral Data Controller Channels per USART Programmable Watchdog Timer Advanced Power-saving Features C CPU and Peripheral Can be Deactivated Individually Fully Static Operation: C 0 Hz to 75 MHz Internal Frequency Range at VDDCORE = 1.8V, 85C 2.7V to 3.6V I/O Operating Range 1.65V to 1.95V Core Operating Range -40C to +85C Temperature Range Available in 100-lead TQFP Package

M5L8253P-5引脚说明: C型高性能32位RISC架构C高密度以MIPS /瓦C小端C十六位指令集C领袖嵌入式冰8 - 16 -位和32位的读写支持256K的片上SRAM的 32位数据总线C单时钟周期存取字节完全可编程的外部总线接口C最大的外部地址空间的64M字节多达8个C芯片选择C软件可编程8位外部数据总线8级优先级,独立可屏蔽,向量中断控制器C四外部中断,其中包括一个高优先级,低延迟中断要求32个可编程I / O口线三通道16位定时器/计数器C三个外部时钟输入C两多用途I / O引脚每通道2个通用同步C两专用外设数据控制器通道每个USART可编程看门狗定时器先进的节能特性 CPU和外设可停用独立全静态工作中:C 0 Hz至75 MHz的频率范围内的VDDCORE = 1.8,85℃2.7V到3.6VI / O的操作1.65V到1.95V范围核心工作电压范围在- 40C至+85 C温度范围内使用的100引脚TQFP封装

Infrared spectra demonstrated that the hemicelluloses in steam-treated chips were less than that in untreated chips. This is one of the main reasons why steam treatment could improve particleboard stability. We found that the reduction of the hemicelluloses in Birch chip was more than that in Spruce chip under the same condition of steam treatment.

用红外光谱对蒸汽处理后刨花中成分的变化进行了分析,发现处理后的刨花中的半纤维素含量减少了,羟基减少了,这就是蒸汽处理能提高刨花板的尺寸稳定性的主要原因之一。

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推荐网络例句

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面,更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。

You rap, you know we are not so good at rapping, huh?

你唱吧,你也知道我们并不那么擅长说唱,对吧?