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In this paper, according to the equation of voltage vector of single-phase motor operating at symmetrical condition, author presents a new voltage-vector PWM method of variable frequency control for single-phase motor. In system, the voltage vector is used as a control parameter.

本文根据单相电动机对称运行时的合成电压矢量方程，提出了以合成电压矢量为控制量的单相电动机电压矢量式PWM变频调速控制方法，并进行了计算机仿真及制作了单相变频器。

When the velocity distribution is specified for a single condition it is refered to as "single point" design.

当速度分布是一个特定条件是被称为"单点"的设计。

In this model, a parameterized method has been employed to decrease or eliminate vertical deflection and vertical refraction errors.4 For the long baselines of Crustal Movement Observation Network of China, using the GPS satellites orbits and stations positioning analysis software GAMIT opened up by MIT to do the single day GPS observation data processing, a synthetic solution model, which is called "the synthetic solution model of baseline vectors", has been built up with several single day baseline vectors calculated by the GAMIT software, to compute the three dimension movement velocities of sites.

对于长基线的GPS地壳变形监测网，采用MIT开发研制的精密GPS定轨定位软件GAMIT进行单天GPS观测数据的处理，提出了利用多期单天的GAMIT解算出的基线向量进行综合解算的模型："基线向量综合解算模型"，用以计算地壳监测站点的漂移速度，并通过实例验证了该计算模型的正确性和可靠性。

The future development trend is except high-end DTVs with more than 37 inches in size, the other sizes of TV will all adopt highly integrated single chip design, which integrates signal demodulator chip, video-control chip, MPEG-2 decode chip, video processing chip, HDMI interface chip and audio frequency processing chip into a single chip, namely SoC.

而未来的发展趋势是除高级的超过37英寸的数字电视外，其余尺寸的电视都会采用高度集成的单芯片设计，信号解调芯片、视频控制芯片、MPEG-2解码芯片、视频处理芯片、HDMI接口芯片和音频处理都会集成在一片芯片上。

Totally different from previous researches, herein the study, we first measured and evaluated the contractile ability of DSMC at"single"cell level. Convert-lens microscope, video-recorder and computer-enhanced morphometric analyzing software were employed to directly analyze the contractile response of a single detrusor cell.

周期性张力牵拉作用后，参数收缩末期细胞面积最大缩小率及细胞长度最大缩短率的测定结果证实，张力负荷条件下单个逼尿肌细胞的收缩力及收缩速度随细胞张力负荷程度增加而下降。

The geology research of carbonate reservoirs in Ordovician of Tahe oilfield showed that many large dissolved vugs and fractures were developed. The spread of the reservoir take on a very heterogeneous state. And the typical fractured-vuggy reservoirs was formed. According to the combination of the various spaces, the formation was divided into vuggy formation, fractured-vuggy formation and fractured formation. The research showed that development of the vug is relevant to the its position on the structure, the fractures, the water surface and the weathering surface. Multi-phase charge and recharge of the oil in the reservoirs resulted in the complexity of the fluid distribution. So the"Bottle Model"was brought forward to explain the movement of the water-oil contact. The special storage space and the complex fluid distribution lead to the unstability of the production and the complexity of the water cut. In order to explain the characteristic of the fracture-vug unit was brought forward and the basic principle and method of the partition of the fracture-vug unit was formed. The classification and evaluation of the units were performed according the reserve and energy. Based on the research of geology characteristic and the fluid flow in the reservoir the comprehensive numerical simulation plan of the fractured-vuggy reservoirs were established. Through the selection of the simulation unit, fluid flow type and parameter equivalent the triple media reservoir simulation model was established. Considering the practical application the model was resolved by the DKR decomposition conjugate grads method. Based on the fine reservoir description of Dsitrict IV of the Tahe oilfield the various space type were classified and combined together. The geology model of Unit S48 was constructed. Two typical single well model was established according to the geology and the dynamic phenomena. Finally the single well model and the Unit S48 were simulated by the triple media reservoir simulator. Via the local grid refinement and coarsening in the simulation good matchs were gained. Based on the results of the simulation the reserve distribution, percent of reserve produced in various space and the natural energy were analyzed. The fluid was storaged in the fractures and vugs mostly and more than 90% the produced oil came from the systems. The energy belonged to the active one. The results of simulation accorded with the fact and showed the validity and practicability the research and the simulator.

塔河油田奥陶系碳酸盐岩油藏的地质研究表明，其储层中发育着很多大型的溶蚀洞、缝，储层的平面展布呈现出极度的非均质性，形成了典型的缝洞型碳酸盐岩油藏，根据各种孔隙介质在储层中的组合，将储层分为了溶洞型、裂缝-溶洞型和裂缝型三类；研究表明溶洞储层的发育和构造位置、裂缝的发育、潜水面和风化面的位置等因素有关；多期充注的油气成藏模式导致了流体复杂的赋存状态，由此提出了所谓的"瓶子模型"，解释生产过程中油水界面的变化；特殊的储集空间类型和流体分布特征导致油田在开发过程中表现出很大的不确定性和含水变化的复杂性，为了合理的解释油气田开发过程中的动态特征，提出了"缝洞单元"的概念，并制定了"缝洞单元"纵横向划分的基本原则和依据及划分方法，并对"缝洞单元"进行了分类和评价；基于地质特征和流体在其中流动规律的研究，提出了缝洞型碳酸盐岩油藏的数值模拟综合解决方案，通过模拟单元的选择、流动类型和参数的等效，建立了三重介质油藏三维三相数值模拟模型，采用不完全LU分解预处理共轭梯度法进行了求解；在塔河油田4区精细油藏描述的基础上，将各种类型的孔隙空间进行了归类组合，建立了S48单元的地质模型；通过对油井生产动态进行分析研究，建立了两类和油井地质、生产动态相对应的单井模型；最后应用三重介质油藏数值模拟软件对单井模型和S48单元进行了数值模拟，通过局部加密和粗化等技术模拟流体流动规律，取得了很好的拟合效果；结合数值模拟结果，分析了各种介质中的储量分布、储量产出的百分比以及地层的能量，认为塔河油田缝洞型油藏中流体绝大多数储集于缝洞系统之中，所产出流体90%以上也来自于缝洞系统，其底水能量属于较充足的类型；模拟结果和油田实际情况符合较好，说明了地质研究和油藏数值模拟研究的正确性。

Lastly, to test the efficacy of shim plate in the single hole plate and research the fatigue life of single hole plate by means of changing the thickness and size of shim plate and the various torque, and then to test the shim plate efficacy at the abutting joint part for studying the fatigue life of the screw connecting component and rivet connecting component of typical wainscot of X air plane.

最后，首先在单孔板上试验垫片的功效，通过改变垫片的尺寸厚度、垫片面积及垫片在承受不同大小力矩下，分析研究单孔板的疲劳寿命，确定垫片尺寸厚度、面积和力矩对单孔板寿命的影响。其次在对接件上试验垫片的功效，研究运X飞机典型壁板螺接结构件和铆接结构件的疲劳寿命。

In accordance with the correlative analyze on the exeperimental data of non equilibrium phase state between water-vapour single component biphasic system and condenste gas biphasic system, it is found that gas-liquid balance time has exponential relationship with pressure and gas-bearing ratio and shares the same rule with water-vapour single component biphasic system.

对水－蒸汽单组分两相体系和凝析气两相体系的非平衡相态实验数据对比分析研究发现，凝析油气体系气液平衡时间与压力和含气率的关系具有指数关系形式，与水－水蒸汽单组分两相体系的非平衡相态规律相同

In view of product quality of cross wedge rolling semifinished product of automotive power-shift box middle shaft which has heavy sectional shrinkage, numerical simulation and experimental method were adopted to analyze single wedge rolling and second wedge rolling method. It is found out that contrast second wedge rolling, single wedge rolling will not make workpiece bend easily, and after rolling the workpiece has no neck shrinkage.

针对用楔横轧工艺生产具有大断面收缩率特点的汽车变速箱中间轴毛坯所存在的产品质量问题，利用数值模拟与实轧试验对汽车变速箱中间轴毛坯一次楔成形和二次楔成形进行了分析研究，发现采用一次楔成形方法加工汽车变速箱中间轴毛坯，轧件不易发生弯曲，中间断面收缩率最大处没有发生缩颈现象，心部质量也较二次楔成形好。

There is no single treatment for whiplash, because there is no single injury.

对挥鞭样损伤而言，没有一个统一的治疗方法，因为其所造成的损伤也是不一致的。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。