查询词典 cascade

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。

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

By virtue of behavior experience in human society and the characteristics of pervasive computing,in addition,according to dynamic transformation discipline between the lag of trust and the anteriority of service,a trust-based model cascade servers is put forward while trust relatiuon establishment,trust degree estimation and update are depicted.The best server satisfied with the user's request is selected out by means of cascade servers to improve the service of quality and efficiency such as multiple evaluation to trust degree dynamically by direct and indirect methods（the third party's recommendation）,which conquers the disadvantage that a singular equipment can't satisfy the request property and blindfold choice of service.

借鉴人类社会行为关系的规律和普适计算环境的特点，依据信任的滞后性和服务的前瞻性矛盾的动态演化规律，提出普适计算环境中信任关系的建立、信任度的衡量和更新以及基于信任的级联服务模型；通过直接和间接的方法动态地对信任程度进行多角度评估，以级联服务的方式从众多可选择的服务目标中筛选出最符合用户要求的服务，克服了单一设备不能完全满足服务请求属性和服务选择盲目性的缺点，提高服务的质量和效率。

E. the discrete scheme of FBEM and the inner damping method of continuity equation, the author made numerical analysis of viscous flow field in cascade and cascade experiment in the experimental wind tunnel of Section 204 of Harbin Institute of Technology. The calculated results are in agreement with the experimental ones.

为进一步验证本文提出的有限边界元素法离散格式和连续方程的内部阻尼法的可行性，作者对叶栅内的粘性流场进行了数值分析，并与在哈尔滨工业大学204教研室的实验风洞上进行的叶栅实验结果进行了比较。

Analyzed the changing of energy loss in turbine cascade with different backward wedge angles,and achieved the range of the backward wedge angles corresponding of the minimum energy losses on three typical sections in the turbine cascade.

分析了叶栅能量损失系数随不同后楔角的变化，得到了在该涡轮叶栅内对应最小能量损失的3个典型截面上的后楔角的范围。

Pombe Protein kinase cascade regulates the response of extracellular stimulation in cytoplast and cell nuclei. The MAPK signal cascade is an ancestral and conservative protein kinase in eukaryote.

MAPK(mitogen-activated protein kinase，丝裂原激活的蛋白激酶)级联是在单细胞和多细胞真核生物中发现的古老而保守的蛋白激酶级联。

According to the characteristics of distributivity and heterogeneity of supervision and monitoring systems at cascade hydropower stations, this paper puts forward a CORBA/Java based monitoring system model for cascade hydropower stations.

根据流域梯级电站监控监测系统的分布式和异构的特点，提出了一种基于 CORBA/ Java技术的流域梯级电站监控系统模型，简要介绍了该系统的结构、特点及软件开发的主要步

It influence the system design of Three Gorges cascade dispatching center much because the epical application in data in Three Gorges cascade dispatching center.

由于三峡梯调通信中心在数据应用上有着特殊的需求，这样的要求对于三峡梯调通信中心的业务体系网络设计有着重大的影响。

In chapter 4, the factorization and cascade decomposition for first order singular systems have been discussed, the if and only if conditions have been obtained, the invariaty of minimality under factoiization and cascade decomposition has been proved.

第四章，讨论了一阶奇异系统的因子分解和级联分解，给出了其具有上述分解的充要条件，证明了极小性在分解下的不变性；对具有一阶奇异系统实现的有理函数矩阵，给出了判定其为正实函数的充要条件，推广了著名的正实引理。

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。

When this condition occurs, inbound replication with the source partner is stopped on the destination domain controller and event ID 2042 is logged in the Directory Services event log.

计算机密码学是研究计算机信息加密、解密及其变换的科学，是数学和计算机的交义学科，也是一门新兴的学科。

Instructions: click on the thumbnails to see a larger image, then use the left-right arrow keys to scroll through the slideshow.

使用说明：滑鼠点在小图上即可放大观赏。开启后键盘左右键可用来换照片。