查询词典 cascade amplification

In the measure amplification circuit, direct-current or low frequency signal come from a common sensor , conveying in only rhyme fashion way after amplification, In typical situation, serviceable signal maximum amplitude probable only have a certain number or amount millivolt, but common mode noise suppression may be up to several volt, as a result it is significant to the factor of the amplification input drift and noise etc for total precision, the amplification in itself common mode restraints features is also equally binding problem.

在测量用的放大电路中，一般传感器送来的直流或低频信号，经放大后用单端方式传输，在典型情况下，有用信号的最大幅度可能仅有若干毫伏，而共模噪音可能高到几伏，故放大器输入漂移和噪声等因素对于总的精度至关重要，放大器本身的共模抑制特性也是同等重要的问题。

That is, in a small flow amplification coefficient; large flow amplification factor is small, the total magnification factor in order to maintain constant flow balancing valve flow characteristics of a small amplification factor is small; large flow amplification coefficient.

也就是在小流量时放大系数大；大流量时放大系数小，为保持总放大系数不变，平衡阀的流量特性应该是小流量时放大系数小；大流量时放大系数大。

Cascade multilevel converter is made up of modules. It can be normally divided into two kinds: one with same modules and the other with different modules. This paper analyzes the relationship among the maximum number of output voltage level, the number of cascaded modules, and the input voltage ratio and THD of output voltage in different kinds of cascade multilevel converter. Then, some guidelines for making up cascade multilevel converter are given.

级联型多电平变换器类似于积木化的结构，本文按模块单元的结构形式，将级联型多电平变换器分为相同单元和不同单元两类，以输出最大电平数为目标，系统地分析模块单元个数与最大输出电平数、输入直流电压与最大输出电平数、以及输出电平数与谐波畸变率之间的关系，从中归纳得到构造级联型多电平变换器的指导原则。

Cascade Amplification Successively using two or more amplification systems.

级联放大逐次使用两个或多个放大系统。

In which signal amplification modules mainly by the amplification cascade composed of three op-amp.

其中信号放大模块主要由运算放大器三级放大级联组成。

The power amplification unit is composed of voltage amplification section and current amplification section.

高压放大单元包括电压放大级和电流扩展级，分别实现电压和电流的放大。

A pair of primers producing 614bp amplification fragment were designed based on the sequence of the C\|polyhedrin gene of Bombyx mori CPV,and the expected amplification products were obatined when genomic dsRNAs isolated from purified BmCPV,DsCPV and Lymantria dispar CPV were used as templates.Genomic dsRNAs isolated from Heliothis armigera CPV and DNAs from Lymantria dispar nuclear polyhedrosis virus and DNAs from midgut tissue of healthy Dendrolimus spectabilis larva did not yield any amplification products.The detection limit of purified DsCPV genomic dsRNAs was 1.0pg.

依据家蚕质型多角体病毒质型多角体蛋白的核苷酸序列设计一对引物，从纯化的DsCPV\，BmCPV和舞毒蛾质型多角体病毒的基因组dsRNA可成功地扩增出长614bp的目的片段，从提取的健康松毛虫幼虫肠组织的DNA、舞毒蛾核型多角体病毒基因组核酸、以及棉铃虫质型多角体病毒基因组核酸，未能扩增出目的片段。

For this situation,no dynamic amplification may be anticipated and a value of unity is assigned to the amplification factor.Nonrigid components may be subjected to resonant behavior and are assigned larger values for the amplification factor.

对于这种情况下，没有动力放大，可预期和价值团结，是分配给功放factor.nonrigid组件可能会受到共振行为，并指派较大的值为放大系数。

Methods(1) Construction of plant expression vector containing RS geneThe cloning vector pT-RS was constructed containing RS gene extracted from the leaf tip of Vitis vinifera by PCR amplification and RS sequence was identified by PCR amplification,enzymes digestion and sequence analysis.The plant expression vector containing RS gene was obtained and RS sequence was identified by PCR amplification and double enzymes digestion too.

研究方法(1)含白藜芦醇合酶基因的植物表达载体的构建提取葡萄基因组总DNA，通过PCR扩增得到RS基因，将此基因连接到克隆载体pGEM-T Vector，得到重组载体pT-RS；经PCR、酶切及序列分析鉴定后，将RS基因克隆到植物表达载体pBI121，得到重组载体pBI-RS，用PCR及双酶切方法进行鉴定。

Isotope separation ; stable isotope ; multi-component mixture separation ; cascade theory ; matched abundance ratio cascade

同位素分离；稳定同位素；多组分分离；级联理论；相对丰度匹配级联

Must have Coordination and negotiation skill, flexible ideas, and be punctilious person.

必须具备较好的协调与谈判能力，头脑灵活，工作认真仔细

Result: 18 patients are all with simple eye.The pigment mole lies in nasal and temple sides of the ball conjunctiva,in which 2 lie in lacrimal caruncle and semilunar plica.

结果：18例患者均为单眼，色素痣大多数位于内外侧睑裂部球结膜面，2例位于泪阜及半月皱襞，经激光治疗后，10例色素痣消失，有5例行再次激光后消失，2例行第三次激光后消失，1例第四次激光后消失。