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Unlike the common hot standby mode with different software between master server and slave server, in this system, master server and slave server are equipotent. It confirmed the identities of master server and slave server according to start-up sequence, and it also has the following functions: synchronous renewal of the configuration files, synchronous storage of data, heartbeat detection, fault diagnosis and server switch.

与一般的在主从服务器端安装不同软件的双机热备方式不同，本系统的主从服务器具有对等性，根据主从采集服务器的启动顺序来确定主从机的身份，并且具有配置文件的同步更新、数据的同步存储、心跳检测、故障诊断与双机切换等功能。

The main work can be summed up as follows: Firstly, we studied the thermal-field properties of VCSELs, and analyzed the influences of current spreading, material parameters and operating conditions on the temperature distributions. Secondly, we began with the electrode voltage and calculated the equipotential s distributions, compared the distributions of voltages and current densities in different depths of VCSELs, and then studied the influences of the oxide-confining region with different position or thickness, and the different sizes of the gain-guided aperture and emitting window on the distributions of the injected current density, carrier concentration and temperature in the active region. Thirdly, we realized the coupling of electricity, optical and thermal-fields, worked out the threshold voltage, calculated the distributions of the injected current density, carrier concentration and temperature under different offset voltages, and analyzed the impacts of temperature profile and carrier density on the refractive index, Fermi levels and optical-field. Finally, we gave the equipotential line distributions with considering N-DBR and double oxidized-confining regions, and analyzed theinfluences of N-DBR and double oxide-confining regions on the distributions of the current density, carrier concentration, temperature and optical-field.

具体工作可以概括如下：首先，研究了VCSEL的热场特性，分析了电流扩展，材料参数和工作条件对于温度分布的影响；其次，从电极电压入手，计算出激光器中的等势线分布，并对不同深度处的电压和电流分布进行比较，研究了高阻区的不同位置和不同厚度、限制层和出射窗口半径的大小对电流密度、载流子浓度和温度分布的影响；再次，实现了电、光、热耦合，求出了阈值电压，计算了不同偏置电压下的电流密度分布、载流子浓度分布和热场分布，分析了温度和载流子浓度变化对折射率、费米能级和光场的影响；最后，给出了考虑N-DBR和双氧化限制层时激光器中的等势线分布，分析了N-DBR和双氧化限制层对VCSEL电流密度、载流子浓度、温度和光场分布的影响。

First, based on double-fed induction generator fundamental equation, the equivalent circuit and internal power relationship are analyzed in this dissertation, which establishes the theoretical base for study.

本文首先从双馈感应发电机的基本原理出发，分析了其等效电路和功率平衡关系，为双馈感应风力发电系统的研究奠定了理论基础。

At high-frequency voltage, a transformer winding is equivalent to a linear, bilateral passive network which consists of linear resistance, capacitance and inductance. The equivalent model of a transformer winding in different frequency bands can be known by studying the bilateral network.

变压器绕组在较高频率的电压作用下，每个绕组本身均可视为一个由线性电阻、电容、电感等分布参数构成的无源线性双口网络，通过对该双口网络的研究可以得到变压器绕组在各个频段的等效模型。

Abstract］ Objective To investigate the clinical effect of Esculin and Digitalisglycosides Eye Drops for asthenopia after LASIK.Methods 100 eyes of 50 cases were given Esculin and Digitalisglycosides Eye Drops to treat asthenopia,compared with matched control subjects（100 eyes） of asthenopia and amplitude of accommodation.

目的 观察七叶洋地黄双苷滴眼液治疗LASIK术后视疲劳的疗效方法运用七叶洋地黄双苷滴眼液治疗LASIK术后病人50例100眼，以视疲劳的自觉症状及眼调节幅度观察指标，与对照组进行对比。

In view ofthe device application,the dispersive optical bistability of a superlatticeFabry-Perot etalon is more suitable.

从应用的角度来看，超晶格Fabry-Perot标准具的色散型光学双稳，更适合于光学双稳器件的要求。

Since one of the goals of DIT is to explain the distribution of human cultural traits, ethnographic and ethnologic techniques may also be useful for testing hypothesis stemming from DIT.

由于双继承理论的目标之一是解释人类文化特征的分布，实地观察法和人种学方法在测试源自双继承理论的假说中也可能是有用的。

Methods The propylbridged biferrocenyl substituted pyridazinone was synthesized by the reaction of propylbridged biferrocene with ethyl succinyl chloride, and then condensed with hydrazine hydrate.

双二茂铁丙烷先与丁二酸单乙酯酰氯发生酰化反应，生成的1，4酮酸酯再与水合肼缩合得到含有双二茂铁丙烷的哒嗪酮衍生物。

Since the High-Lying Vibrational excited levels and dissociate behavior of gas diatomic molecules: H2, O2, N2 and CO are very important in actual studies and applications, using the algebra method and the algebra energy method to obtained full vibrational energy spectra {E} and molecular dissociation energies are base on limited experiment energy level {E} in this paper. The study result has provided the important high vibrational excited state energy level and the reliable dissociation energy data for the research partial dissociating gas physics and the chemical property.

鉴于气体双原子分子H2、O2、N2和CO的高振动激发态能级和离解行为在实际研究中的重要性，本文应用代数方法和代数能量方法，以部分气体双原子分子有限的实验能级［E］为基础，获得了H2-X1Σ、O2-A^3Σ、O2-c1Σ、N2-X1Σ和CO-X^1Σ共5个电子态的完全振动能谱｛E｝及其分子的离解能，为研究部分离解气体的物理和化学性质提供了重要的高振动激发态能级和可幸的离解能数据。

In order to solve the special technical problems, a structure model with double-stair and multiple-stage compression was given, the structure of pressing chamber of present screw press was improved, and a laboratory-scale cold expeller was designed and manufactured.

针对双低油菜籽脱皮籽仁在冷榨过程中存在的一些关键技术问题，提出了双阶多级压榨的冷榨结构模型，对现有的螺旋榨油机的榨膛结构进行了改进，设计并制造了一种小型实验型冷榨机。

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。