查询词典 amplifying

precise calculating formula is derivated to determine magnification ratio of voltage,input resistance and output resistance in amplifying circuits based on th feedback circuit model with cascade voltage.with th new calculating methods put forward by the author,it is possible to solve the problems in terms of calculation in amplifying circuits,the key problem being low level of exactness.the research shows the influence of components′ parameters of basic amplifying circuits and feedback circuits on feedback amplifying circuits.the results of the research may contribute to design amplifying circuits and electronic instrument with higher performance,due to the simpler calculation in the design of feedback circuit with cascade voltage.

摘 要：在建立电压串联反馈电路模型基础上，推导出放大电路中的电压放大倍数、输入电阻、输出电阻的精确计算公式。提出新的计算方法，从而解决了放大电路计算不方便，精确度不高、准确性不够的问题。同时进一步揭示了基本放大电路、反馈电路元件参数对反馈放大电路的影响关系。为设计出高性能放大电路及电子设备指明了方向，更加方便于电压串联反馈电路的计算。

In this system , microvolt amplifying circuit module and isolation amplifying circuit module is used in external circuit, improving exactitude of plasma diagnosed, and overcoming separate disturbance effectively .

该系统的外围接口电路采用微伏放大模块和隔离放大模块，提高了信号采集的精度，并有效克服了各种干扰。

From the experiment discovered for the first time the dimethyl ether may substitute CO to take the chain-carrying agent of the peroxy free radical chemistry amplifier system, and optimized the CH_3OCH_3-NO-HO_2 chemistry amplifying system determination condition, the CH_3OCH_3 best density is 1.876 ppmv, the NO best density is 1.3ppmv, and obtained this method chain length CL=124, 5 parallel determinations densities of HO_2 are the 44.0pptv, the relatively standard deviation is smaller than 4%; Although chemistry box model computed result indicated the dimethyl ether, the ethene, the propene and the ethanol all can take the chain-carrying agent of the peroxy free radical chemistry amplifier system, and their simulation chain length all grows up compared to the CO-NO-HO_2 chemistry amplifying systems, but experiments proved the ethene, the propene and the ethanol have not suit the chain-carrying agents.

首次从实验上发现二甲醚可以替代CO作为过氧自由基化学放大系统的链传递试剂，并优化了CH_3OCH_3-NO-HO_2化学放大系统的测定条件，CH_3OCH_3的最佳浓度是1876ppmv，NO的最佳浓度为1.3ppmv，并得到了这一方法的链反应长度(CL=124)，5次平行测定浓度为44.0pptv的HO_2自由基，相对标准偏差＜4％；虽然化学盒子模式计算结果表明二甲醚、乙烯、丙烯和乙醇都能作为过氧自由基化学放大系统的链传递试剂，并且它们的模拟链长都比CO-NO-HO_2化学放大体系的链长大，但是实验证明乙烯、丙烯和乙醇不适合作为过氧自由基化学放大系统的链传递试剂。

And the automatic mechanism of signal amplifying is offered, user can adjust the amplifying ratio according to requirement.

同时，系统提供了增益控制机制，用户可根据需要自动调整增益的大小。

With conventional PCR primer pair XBFF/R,the same 352bp bands appeared by amplifying all the DNA samples from the eight races,and no bands appeared by amplifying all the DNA samples from the 9 plant pathogen species(Cucumber powdery mildew,wheat yellow rust,wheat leaf rust,wheat stem rust,wheat scab,wheat sheath blight,wheat loose smut,maize sheath blight and maize head smut)and control.

3用常规PCR和实时荧光PCR两种方法对温室接种的小麦白粉病进行了检测，并在时间上与自然显症的观察进行了比较，结果表明：在温室条件下，小麦白粉病菌在接种后第5d时开始出现小麦白粉病病斑，而利用常规PCR引物XBFF/R可在接种第3d检测到小麦白粉病菌，比自然显症观察能够提前了2d检测到白粉病菌；实时荧光PCR法可在接种后1d即能检测到小麦白粉病菌，比自然显症观察能够提前了4d检测到白粉病菌，这可为白粉菌的预测或预警检测提供依据，更可为白粉病在流行前制定防治决策赢得宝贵时间。4。

Then, two primers were designed from it, the full length cDNA of malate dehydrogenase gene in Chinese cabbage was gained through RT-PCR amplifying and sequencing and entered GenBank as accession number FJ208590, which is 1 209 bp length and coded 403 amino acids.

然后设计引物，经RT-PCR扩增、测序，获得了大白菜苹果酸脱氢酶基因的cDNA全长序列，并已将其登录到GenBank，登录号为：FJ208590，该cDNA全长1 209 bp，编码403个氨基酸。

The development of MEMS optical switches including electromagnetism driven mobile micro-switch, electrostatic driven optical switch, optical switch matrix of MEMS optical amplifying and spray-ink air bladder MEMS optical swith, wavelength selective switch, both at home and aboard is reviewed, and the structures, performances and fabrications of these components are analyzed.

介绍了目前国内外光纤通信系统中所涉及的电磁驱动移动式MEMS光开关、静电驱动式光开关、基于MEMS光大器的可扩展型光开关矩阵、喷墨气泡MEMS光开关、开环式1×N波长选择MEMS光开关。对这些器件的结构原理，制造方法及其性能指标作了分析。

Some financial regulations might have accelerated the spread of the originate-to-distribute model, which is blamed for amplifying leverage and obscured the allocation of risks.

一些金融法规可能加快了"贷款并证券化"(originate-to-distribute)模式的传播——该模式被指责为放大了杠杆效应和模糊了风险分配。

In order to find out effective antimalaria measures in the later period of malaria eradication,the experimental studies on the malaia eradication were undertaken from 1984 to 1988.The following measures were taken:setting up and amplifying organizational administrative systems;making initiative and passive detections of cases;making epidemiological investigation on the remaining infectious sources and trying to wipe them out,etc.

为寻求灭疟后期有效防治措施，于1984～1988年进行灭疟后期管理与监测实验研究，采取建立健全组织管理制度，开展主动和被动的病例侦查以及对检索出的残存传染源，进行流行病学调查等"查灶拔源"措施，加强流动人口管理，发热病人涂片血检，及时发现和根治输入病例，效果显著。

Amplifying 16S RNA fragments by PCR technique is a feasible method to make an early diagnosis of Brucella infection.

利用PCR技术扩增布氏菌16S RNA基因片段可以实现对该菌的早期诊断，为布氏菌的分子遗传学和流行病学提供依据。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。