查询词典 factor system

The solar-powered lighting system developed in this study possesses a few advantages, including energy conservation, high efficiency, a low lamp-current crest factor and a low starting lamp-voltage, which all conform to the general intention of green lighting.

本文所设计的太阳能萤光灯照明系统，具有节能、高效率、低灯管电流峰值因数及低启动电压的优点，能符合绿色照明之实用潮流。

Multicarrier and multicarrier CDMA systems are the candidates with a greatapplied foreground for future mobile communications system.Some keytechniques in the two kinds of systems,including the reduction of peak-averagepower ratio and so on,are studied in this dissertation.The main contents ofthe dissertation are as following:(1) The way to constitute a multicarrier signal by using any onecomplementary code from multiphase complementary code pair is proposed,andthe upper bound on crest factor for a multicarrier signal is studied.

多载波及其多载波CDMA系统是未来移动通信系统一种很有应用前景的侯选方案，本文针对这两种系统中的峰平功率比减小等关键技术进行了研究，主要内容包括：(1)提出了利用多相互补码对中任一互补码构成多载波信号的方法，研究了多载波信号峰值因子的上边界。

By choosing the index closely related to people's quality of life and setting up the index system to study inhabitants' quality of life,this paper selects cross-section data of 31 provinces,and analyzes the quality of life in the 31 provinces with method of factor analysis.

自美国经济学家加尔布雷斯1958年在其著作&富裕社会&中提出&生活质量&一词以来，关于如何测定和评价居民生活质量的问题一直受到各界广泛关注。如今，提高居民的生活质量已成为社会经济发展和构建和谐社会的目标。

Media Help Everyday we are exposed to the steam often divided into two, one, the boiler steam - saturated steam 2, thermal power plants out of steam - superheated steam 1, a relatively stable temperature and pressure saturated steam, temperature lower than 250 ℃, working pressure lower than 1.6Mpa 2, superheated steam temperature and pressure changes of a high base temperature up to 400 ℃, working pressure is lower than 4.0Mpa For the first steam, we usually use soft sealing steam solenoid valve as follows: Structural characteristics This valve is a valve and Balance valves main valve by the two vice components with the second open valve Pilot solenoid valve Heat: electromagnetic part, some with special high temperature seals and sealing materials, electrical materials, and apply a variety of insulation measures Wear: selection and reasonable Globe Valves guidance suite valve cup and clever use of fluid lubrication, reduce wear, increase life expectancy Resistance to condensation: condensation of steam pipeline valve on the steam water is an important factor in action, the valve will not affect the condensation water Other uses - soft sealing steam solenoid valve This series solenoid valve can Safety valves be widely used in textile, printing, chemicals, plastics, rubber, pharmaceutical, food, building materials, machinery, electronics, surface treatment and research sectors and bathroom, dining room, air conditioning automatic control system.

介质说明日常生活中我们接触到的蒸汽常分为两种，1、锅炉蒸汽-饱和蒸汽 2、热电厂出来的蒸汽-过热蒸汽 1、饱和蒸汽温度压力相对稳定，电动阀门执行器温度低于250℃，工作压力低于1.6Mpa 2、过热蒸汽温度压力变化基数较大温度最高可达400℃以上，工作压力则低于4.0Mpa 对于第一种蒸汽，我们通常会选用氧气专用阀、铜阀门软密封的蒸汽电磁阀如下：结构特点本阀是由副阀和主阀两大部件构成的先导式二次开阀的电磁阀耐热：电磁部分、密封件部分用特种耐高温电工材料和密封材料，并应用了各种隔热措施耐磨：选材合理，电站阀门阀杯和导向套间巧妙地利用流体的润滑作用，减少磨损，提高寿命耐冷凝：蒸汽管道的冷凝水是影响蒸汽电磁阀动作的重要因素，本阀则不受冷凝水影响其他用途-软密封蒸汽电磁阀本系列电磁阀还可广泛地应用平衡阀纺织、印刷、化工、塑料、橡胶、制药、食品、建材、机械、电器、表面处理和科研部门以及浴室、食堂、空调等自控系统。

The force of low-level frontal zone disturbance is a major factor of the development of middle and low level cyclone. The large center of negative geopotential perturbation inversed by low-level disturbance potential vorticity is located in the front of cyclone providing a favourable condition for the eastward moving and development of cyclone. The high-level system plays a role of indirect force action. The interaction of the development of high-level trough and ridge and low-level frontal zone becomes an important mechanism of the developing of cyclone.

低层锋区扰动强迫是中低层气旋发展的最主要因子，低层位涡扰动反演所得的负位势扰动大值中心位于气旋的前方，有导前现象，为气旋继续东移、发展提供一个铺垫；高层系统起着间接强迫作用，高层槽脊系统的发展和低层锋区的相互作用所导致的斜压扰动成为气旋发展的重要机制。

A fifth-order uncertain non-affine nonlinear model is presented. The proposed model can describe the dynamic characteristics of both DC and AC system. The difference of damping factor and inertial time constant between generator units is considered in the model.

综合考虑AC/DC系统交、直流部分的动态特性及其实际电力系统中各发电机组的阻尼系数和惯性时间常数的不同性，提出了一类五阶非仿射非线性的控制模型。

Using the models, the author has also calculated the vibration response to high speed railway vehicles of three types travelling over simply-supported beam bridges with various span lengths respectively. Based on the analysis of the computation results, the concept of resonance velocity of a bridge under a high speed running vehicle is present, and it is pointed out that comparatively great vibration of bridges on high speed railways is caused by bridge resonance resulted from the static force pulsating. In a vehiclebridge coupling vibration system, the damping constant of the axle spring is the main factor affecting the response variable of bridge velocity resonance, and the influence of track irregularity on bridge vibration on high speed railways is rather smaller.

利用所建立的计算模型，计算了三种形式的高速铁路车辆通过各种跨度简支梁桥结构时的振动响应，对所得到的计算结果进行了详细的分析，提出了高速行车下桥梁共振速度的概念并指出高速铁路桥梁产生较大振动的原因是静力脉动引起桥梁共振造成的；通过研究车—桥耦合振动系统方程的参数后指出，在车—桥耦合振动系统中，车辆—系阻尼的大小是影响桥梁速度共振时响应大小的主要因素，轨道不平顺对高速铁路桥梁振动的影响较小。

This model may express well dog disease diagnoses the symptom and the conclusion uncertainty analysis and the treating processes in the expert system, reduce the subjective factor to the clinical diagnosis and the treatment conclusion influence.

该模型可以很好地表示犬病诊断专家系统中症状和结论不确定性的分析和处理过程，减小了主观因素对临床诊断和治疗结论的影响。

As solenoid valve the key component in the electronic-control system, the essay focuses on certain solenoid valve construction and characteristics, and set the mathematics model, which used the Simulink to analyze the driving voltage, spring tension and mobile quality, and found that it is complicated on the influence of different factors on solenoid valve, one factor can accelerate the turning off response, but may slower turning on response.

由于电磁阀是电控喷油系统中的关键器件，因此本论文针对某型电磁阀的结构和特点，建立了数学模型。并运用Simulink软件对其进行了仿真研究，分析了驱动电压，回位弹簧预紧力以及运动件质量等对电磁阀响应特性的影响。研究发现影响电磁阀响应特性的因素是十分复杂的，一种因素往往在加速电磁阀关闭响应的同时却会延迟电磁阀开启的响应。

Carbon nanotubes after oxidation and purification were used to pack a micro-column which was incorporated into a sequential injection system for facilitating online selective sorption of lysozyme from egg-white. The retained protein was afterwards quantitatively eluted by a carbonate buffer. With a sample loading volume of 2.0 mL, an enrichment factor of 12 was obtained, along with a retention efficiency of 100% and a recovery rate of 100%.

将多壁碳纳米管经氧化和提纯后装入固相萃取柱，在顺序注射系统中实现对蛋清中溶菌酶的在线选择性萃取，以碳酸盐缓冲溶液定量洗脱，进样量为2 mL时，富集倍率为12，吸附率和洗脱率均为100%，采样速率为10 h^(-1)，精密度为3.0%。

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。