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Based on the mechanics analysis of reheater desuperheating spray used in large scale power units and the partial differential theory and matrix analysis method,an analysis model for calculating the influence of reheater desuperheating spray on power plant s thermal economy has been established through rigorous mathematical derivation.

对大型机组的再热器减温喷水的机理进行分析，运用偏微分理论和矩阵分析方法，经过严密的数学推导，建立了再热器减温喷水对机组热经济性影响的计算模型。

Based on the mechanics analysis of reheat er desuperheating spray used in large scale power units and the partial differential theory and matrix analysis method,an analysis model for calculating the influence of reheat er desuperheating spray on power plant s thermal economy has been established through rigorous mathematical derivation.

对大型机组的再热器减温喷水的机理进行分析，运用偏微分理论和矩阵分析方法，经过严密的数学推导，建立了再热器减温喷水对机组热经济性影响的计算模型。

In order to solve the derivation of power exponent function,this paper has studied the derivation regulations on power function from the perspective of the differentiation of multi-variable function and in accordance with the derivation laws on multi-variable complex function.

为解决幂指函数的求导问题，从多元函数微分法的角度出发，根据多元复合函数的求导法则，探索幂指函数求导的规律，并揭示了幂指函数与幂函数及指数函数导数间的关系，给出了幂指函数求导的另一种方法。

The model of the received power is established based on the basic principles of geometry optics and radiometry. This model provides the principle of receiver-transmitter design and performance evaluation. On the basis of the received power model and APD noise model, the response of measurement signal after passed through the frequency difference circuit and the corresponding change of its SNR are studied.

研究了非合作目标测距时，发射视场与接收视场的重叠情况，以及视场重叠区域内光的探测情况，并以此为基础，根据几何光学和光度学的基本理论，建立了非合作目标测距中接收光功率的数学模型，为接收/发射器的结构设计，以及测距性能的预测提供了理论依据。

A non-linear reactance model and an electric principle diagram of power supply for the 90tCONSTEEL EAF at SISG are constructed,based on the data on-site gathered with the furnace,and thus a more rational power supply curve is worked out.

根据现场实测数据，确定韶钢90 tCONSTEEL电弧炉的非线性电抗模型和电气圆图，从而制定了较合理的供电曲线。文中着重讨论了建立电弧炉电抗模型的原则、方法及其对制定合理供电曲线的作用

This paper focus on some topics described as following based on the summarizer of:(1) Feature extraction of the EEGAnalyzing the origin, the mechanism and the framework of the EEG and using the power spectral density, AR model parameter, band power and the wavelet entropy as the features of the EEG recorded during imagination of hand movements.

本文在综述国内外研究现状的基础上对基于脑电信号的意识任务的识别进行了以下几个方面的研究讨论：(1)提取脑电信号的多个特征量对EEG信号的来源，产生机理，结构特征等进行分析，运用经典功率谱估计，AR模型功率谱估计，AR模型参数，信号能量，小波熵等多种方法对想象左右手动作的脑电信号进行特征提取，并比较其性能。

Based on the N-1 principle of power system, a nonlinear optimized model of steady state security restriction on the power flow of transmission tie line group is proposed, and its iterative algorithm is detailed.

就电网运行中广泛采用的N-1原则，建立了输电断面潮流静态安全约束的非线性优化数学模型并给出了迭代求解算法。

Support 720p/1080i - Playback files in PC through wired Ethernet (10/100Mbps)- Playback the recorded contents in HDD; Playback the files stored in HDD - directly playback the files on external devices like USB drive, HDD, Card reader(through USB2.0 Host Port)- support multiple file format: MPEG 1 /2/4, DivX, Xvid, VCD/SVCD/DVD, MP3/WMA, Dolby digital, AC3, JPEG, Kodak picture CD - fast forward/reverse, repeat playback - view Pictures in various ways: Rotate, zoom, music slide show Transferring/storage function - with USB2.0 Target port and USB2.0 Host port - work as USB HDD when connected to USB port on PC for file store / backup / transfer (through USB2.0 Target port)- supports USB drive, HDD, Card reader data exchange (through USB2.0 Host port) Editing recorded A/V title without PC - HDD format - AB Erase, split title, merge title, add chapter mark - Copy, delete, Rename Terminals: Composite video in, composite video out, component video out, left/right audio in, left/right audio out, mini optical audio out, RJ45 net port, USB2.0 Host, USB 2.0 Target HDD Support IDE HDD, support FAT32 File Support FAT32 and NTFS Power: DC12V(1.5A) Power consumption: 1W, 6W.

支持720 p/1080i的影像-播放档案的电脑，通过有线以太网（ 1 0/100）-重放所记录的内容，在硬盘；重放档案储存在硬碟-直接播放该档案的外部设备，如U S B驱动器，硬盘，智能卡阅读器（通过u sb 2 0.0主机端口）-支持多种文件格式：的M PEG1 / 2 / 4 ，转换，音频，视像/格式/数码影碟， m p3/wma，杜比数字， a c3，的J PEG，柯达图片光盘-快速前进/扭转，重复播放-看照片以各种方式：旋转，缩放，音乐幻灯片播放转让/存储功能-与U S B2.0的目标端口和U S B2.0主机端口-工作作为U SB硬碟当连接到US B端口的电脑档案储存/备份/转让（通过USB2.0的目标端口）-支持U SB驱动器，硬盘，智能卡阅读器的数据交换（通过U SB2.0主机端口）编辑记录的音频/视频标题，没有电脑-硬盘格式-抗体抹掉的，分裂的所有权，合并名称，地址章马克-复制，删除，重命名终端：复合视频，复合视频，分量视频输出，左/右音频，左/右音效输出，迷你光学音效输出，接头R J45网络端口， U SB2.0主机， USB 2.0接口目标硬盘支持的IDE硬盘，支持FAT32文件的支持和FAT32和NTFS电源：： DC12V （ 1.5A和）耗电： 789， 6瓦特。

The paper reviews the phylogeny of the LCD, describes the recent development situation of LCD-TV and several authority investigation institution do its prospective forcast. The research of the switching power supply, future development t rend is given in the paper. Outlines of LCD-TV technology, introduce the sort of topological structure. The BUCK type converter topological structure and the systematical basictheory were put emphasis on; the PFC, the reasons of power factor simply and the core of L6562 were analyzed, emphatically on the application circuit of this core, and account the design parameter of the application circuit. The sort and control mode of PWM, the control core of UC3846 and OB2262 were explained, the application circuit of this core were specific analyzed, practice picture in the real circuit uses oscilloscope were educed and contrastive analysis in this research.

本文回顾了LCD的发展史，介绍了LCD-TV发展的近况和一些权威调查机构对其未来的预测；对开关电源的研究概况和它的发展趋势作了总结；总体介绍了LCD-TV电源的结构及工作原理、拓扑结构的分类，着重研究了BUCK型变换器的拓扑结构及工作原理；对PFC作了综述，研究了功率因数降低的原因，重点介绍了L6562芯片，对此芯片的应用电路作了具体分析，并对芯片外围的设计参数作了分析研究；研究了PWM的分类和控制模式，对控制芯片UC3846和OB2262分别进行了重点说明，详细研究了基于UC3846的PWM设计，用示波器对其实际电路进行了抓图，并对比分析实际波形。

Turn the "power" button on, then the "Power" indicator will turn on and this device will pre-check user electrical circuits and the devices which connected inside the electrical circuits.

2.4.3 打开本产品"电源"开关此时前面板"电源"指示灯亮，并对用户用电线路和接入线路的设备进行预检，预检时间≤5s ；预检无故障，"负载"指示灯亮。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。