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Ultrasonic is a kind of mechanical wave that frequency is upper 20KHz. Ultrasonic may be generated by many ultrasonic transducers.

超声波是频率高于20KHz的机械波，它可由多种能量转换器转变而成。

Week 4 Supposition of two vibrations with same frequency and direction, condition generated mechanical wave, dynamic equation of plane harmonic wave.

第4周 同方相同频率的两个简谐振动的合成；机械波产生的条件；平面简谐行波的运动学方程。

In addition, the large mercaptan peaks that are generated during the MSU regeneration process are smoothed out in a peak-shaving system that is part of the MSU-regeneration- gas treating unit.

此外，在MSU再生处里过程中所出现的巨大硫醇高峰也可以通过其调峰系统来平滑掉。

And it was known that mercury could cause free radicals to be generated in large numbers within the brain.

这是众所周知的汞可能会导致自由基的产生，以在大批与脑。

Falciparum isolates prepared directly from 5 cases of cerebral malaria patients'blood in Mengla County, Yunnan Province and in Yingjiang County, Yunnan Province were used for polymerase chain reaction amplification and the two pairs of oligonucleotides for the highly conserved genes encoding the regions 12—17 in MAD20 merozoite surface protein 1(MSP1) of Papua New Guinea strain of P . falciparum were used as primers. The PCR products were digested with EcoRI and KpnI, respectively, and the generated fragment regions 16—17 were cloned into M13mp18 and M13mp19 vectors and their DNA were analyzed as the templates for DNA sequencing by the dideoxy chain-termination method.

应用多聚酶链反应技术对中国5 例脑型疟患者恶性疟原虫云南省勐腊县勐罕CMH/YN 分离株和云南省盈江县农场CYJ/YN 分离株基因组DNA 裂殖子表面蛋白1 (MSP1)第13—17 区基因进行扩增，将扩增产物分别经EcoRI 和KpnI 双酶切后，回收的MSP1 第16—17 区基因分子定向克隆M13mp18 和M13mp19 载体，按Sanger 双脱氧链终止法进行DNA 序列测定，并与MAD20、K1 和Wellcome 株原型基因进行同源性分析比较。

Methods Genomic DNA samples of two isolated Plasmodium falciparum isolate strains prepared directly from 5 cases of cerebral malaria patients′ blood in mengla County, Yunnan Province and in Yingjiang County, Yunnan Province were used for polymerase chain reaction amplification and the two pairs of oligonucleotides for the highly conserved genes encoding FC27 merozoite surface protein 2 (MSP2) of Papua New Guinea strain of Plasmodium falciparum were used as primers. The PCR products were digested with BamH1 and Hind Ⅲ respectively, and the generated fragment MSP2 were cloned into M13mp18 and M13mp19 vectors and their DNA was analyzed as the templates for DNA sequencing by the dideoxy chain-termination method.

应用多聚酶链反应对5例中国脑型疟患者恶性疟原虫云南省勐腊县勐罕分离株和云南省盈江县农场分离株基因组裂殖子表面蛋白2(MSP2)基因进行扩增，将扩增产物分别经BamHI和Hind Ⅲ双酶切后，回收的MSP2基因分子定向克隆M13mp18和M13mp19载体，按Sanger双脱氧链终止法进行DNA序列测定，并与恶性疟原虫株FC27、K1、IC1和CAMP株进行同源性分析比较。

This dissertation introduces the whole scheme、the hardware electro circuit design and software design, the result of experiment on salinometer is preferred at the end of the dissertation. Salinometer is base on SOPC technology, and use digital technology to design circuit: the excitation source for balance bridge is generated by digital method, its shape、amplitude and frequency can be control by digital signal, the standard branch of bridge is composed of three digital-analog-conversion, and uses the method of successive approximation to regulate the balance of bridge.

盐度计以SOPC技术为基础，通过数字化方式设计测量电路：电桥的激励源由数字化方式产生，激励源的波形、幅值和频率等可由数字量控制；平衡电桥标准支路由3个数模转换器组合实现，测量时以逐次逼近的方式调整电桥的平衡度；检测电桥平衡度的高灵敏度数字检流计同样以数字化方式设计，它的增益由程序控制，将电桥的输出电压数字化，以软件判断电桥平衡度。

Objective To study the integration, transcription and expression of human bcl-xL gene in the transgenic mice generated by microinjection.

目的 研究人bcl-xL基因在显微注射所产生的子代小鼠中的整合、转录和表达情况。

If a phototypesetter is an intermittence type, the memory of controller is used only to buffer a section and the buffer of whole page lattice is unnecessary. If a phototypesetter is an uninterruption type, a section of lattice is only generated and buffered for every time and then be converted into black-white sectional information, whose information quantity is much less, by microprogram for buffering whole printed sheet. On scanning, the black-white sectional information is real-restored into lattice to output.

当照排机是"走走停停"类时，控制器的存储器只需缓冲一段，而不必缓冲整版点阵；当照排机是"不许停顿"类时，则用分段方法每次只生成一段点阵并缓冲，然后用微程序把这一段点阵转换成信息量少得多的黑白段信息作整版缓冲，扫描时在实时下把黑白段信息复原成点阵输出。

In microprogramming automatically generated under the control of various modules of the control signal to achieve the functions of addition and subtraction instructions.

能在微程序的控制下自动产生各种单元模块的控制信号，实现加减法指令的功能。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。