分析试验

To begin with, this paper deals with the importance of turbine generator unit fault diagnosis, and analyses the existing research states and developing trend of fault diagnosis as well as the application prospect of fault diagnosis in details.

结合盐锅峡水电站5#水轮发电机组的真机试验研究，通过对试验数据的分析和诊断，得出的结论对于水电厂的现场实际具有一定的指导意义。

From the theory of dielectric breakdown, the mathematic method was used to describe the whole course during which the dielectric captured the electric charges that was immitted by electrode.

从电介质的击穿机理出发，用数学方法描述了电极注入电荷被介质捕获的全过程，详细分析了电介质的击穿特性并得出了电击穿现象的理论公式，通过同成分铌酸锂晶体和掺锌铌酸锂晶体的极化和击穿实验对理论分析的结果进行了验证，试验现象与理论分析吻合较好。

In order to find the soil nutrients limiting-factors of the Rice spike develop abnormality in Jianghuai Hilly Land ,the soil nutrients limiting factors in those areas were studied with a systematic approach technique on soil nutrient status through laboratory analysis,absorption study, pot experiment and using sorghum as indicator plant in Feidong,Changfeng and Yingshang in Anhui province.

为了摸清安徽省江淮丘陵地区水稻&颖壳不闭&土壤养分限制因子，采用土壤养分状况系统研究法，通过化学分析、吸附试验及盆栽试验，以高粱为指示作物，对安徽省江淮之间的肥东县、长丰县和颍上县水稻&颖壳不闭&土壤的养分限制因子进行系统研究。

Then the error sources of the reaction type and electron type electric energy mete were analyzed and the theory analysis result through the concrete test have been proved. At last, the main conclusion has been drawn. When the induction type electric energy meter measures harmonics energy, the negative error characteristic appears. The higher the frequency of harmonics is, the greater the error is. The electron type electric energy meter can measure harmonics energy accurately in general cases. Except thermo-electrical conversion type electron type power meter, reaction type and electron type electric energy meter can measure direct current power.

本论文通过分析感应式和电子式电能表的工作原理推导出了电能表计量电能的数学模型；分析了感应式和电子式电能表的误差来源以及谐波对计量的影响，并通过具体的试验对理论分析结果进行了验证；得出了如下谐波对电能表计量影响的主要结论：感应式电能表计量谐波电能时，呈现负的误差特性，谐波频率越高，误差越大；电子式电能表在其频响范围内可以准确计量谐波电能。

Influence of limestone powder admixture on working performance of concrete;2. Non-linear analysis of coordinated working performance between infilled wall and steel frame;3. Based on large quantity experiment data,the working performance criteria Lz of self-rotating spring is generalized which is believed to be valuable to .

换热管内插自旋弹簧的几何参数对其强化传热和自动除垢效果有重要的影响，通过对多组试验结果的比较分析，得出了无量纲参数D1/S、D1/D0对换热管内自旋弹簧的转动特性和流体阻力特性的影响规律，并在大量试验数据的基础上归纳出一个换热管内自旋弹簧工作性能的综合评判准则——L z准数。

The effects of some physical chemical properties of soil and variety forms of lead on accumulation in Houttuynia cordata Thurib were discussed, the effects of lead on growth and physio-biochemical characteristics were discussed, and the absorption and tolerance of lead in Houttuynia cordata Thunb were studied especially by Filed Survey, Analysis Sampling, Pot Experiment and Hydroponic Experiment.

通过野外调查及采样分析、土培试验和水培试验，本文探讨了土壤理化性质和土壤不同铅形态对鱼腥草吸收累积铅的影响，铅处理对鱼腥草生长及生理生化特性的影响，以及鱼腥草对铅的吸收特性和耐性。

The mathematical models for overall breaking process of circuit breaker are developed, through which the driving mechanism and the arc chamber, the interruption performance and the opening velocity are closely connected, the breaking process under different interrupting conditions are simulated, then the arcing time difference is determined. The interrupting conditions include line charge current, breaker terminal fault current and short line fault current .

本文建立了一种把操动机构与灭弧室相联系、开断性能与运动特性相联系、一维和二维模型相结合的压气式SF6断路器开断性能的仿真方法，对不同开断条件下（包括线路充电电流开断、不同试验方式的端子短路开断、不同试验循环的近区故障）断路器的开断过程进行了分析，用仿真的方法确定了断路器在不同开断条件下能成功开断的燃弧时差，并给出了开断性能与运动特性之间的关系。

In the last part of the thesis, evaluation of fatigue strength and life in the positions of checking computations in the weldings of bearing load in box-shaped anchorage was made by referring to AASHTCK BS5400、 Eurocode.

分析结果表明，按照Eurocode规范分析的预期寿命较为保守，比由疲劳试验加载次数和荷载幅推算而得的最小疲劳设计寿命小，其分析方法可用于初步设计阶段的选型和初算。

Based on the analysis results, the factors causing the performance variation of the varistors in steady state damp heat test are investigated.

通过对ZnO压敏电阻器试验结果的分析，探讨其在稳态湿热试验中引起性能变化的因素，提出要提高产品的耐湿性能，必须在包封料选择和瓷体制作工艺上加以改进。

Secondly, the operating principle and the mathematical model and the control method about the three-level voltage source high power factor PWM converter are analysed .The generation of the PWM trigging pulse control signal are introduced emphatically. On the basis of this, the hardware experimentation circuits are built with DSP and CPLD, and the trigging pulse signal is generated exactly. The feasibility of the circuit is verified by the experiment result.

其次，分析了三相电压型变流器的原理、模型、控制方法并着重研究其PWM 触发脉冲控制信号发生技术，并以DSP、CPLD 等芯片搭接了硬件试验电路，产生了正确地触发脉冲信号，试验结果证明了设计的合理性。

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。