查询词典 design of experiments

The foundation of this system provides a good reference to promote the standardization and intelligence of the overhaul and maintenance of vacuum switches. This paper develops a special HF pulse power supply for internal pressure estimation, which achieves the output of HF-HV sinusoidal pulse wave whose frequency and amplitude can be modified respectively, and meets the design requirements according to the results of Simulink simulation and practical experiments. With the help of AT89S52, this paper designs an I~2C serial bus based signal detection system for peak value signal acquisition of HF pulse currents, which communicates with the upper computer by asynchronous serial communication for uploading the data. In the upper computer, a human computer interface is developed by Matlab software, whose functions are to do some computation and graphic display, such as calibrating the relation curve of vacuum degree and peak value of HF pulse currents, vacuum degree computation, and vacuum lifetime evaluation analysis basing on grey forecasting model as well as making relative suggestions.

本文研制了用于真空度检测的高频脉冲电源，通过Simulink仿真和试验检验其满足设计要求，实现了电压幅值和频率独立可调的正弦波高频高压脉冲输出；利用以AT89S52为核心基于I~2C串行总线的信号检测系统实现高频脉冲电流峰值信号的采集，通过异步串行通信实现单片机与计算机之间的数据通信，将检测数据传至上位机；在上位机利用Matlab开发人机交互界面，实现相关数据处理和图形显示，包括真空度——高频脉冲电流峰值关系曲线标定、真空度数值计算、基于灰色预测模型的真空寿命评估分析和提出相应决策建议。

The elastic stress diagram design method is behind the times and cant meet the command in practice.In the paper the author collected and analyzed a large amount of data about the SLRCP on several typical domestic model experiments and the projects in practice. By summarizing and analyzing the data, the author set up a typical computing model and analyzed the model by the software ANSYS, by reading the output data of the stress and the crack from the program, combined with the experimental results, the author summarized the destroy procession of the stock. The paper also discussed the influence of other main factors to the crack and the stress besides the internal water pressure, such as the concrete material, the dimension of stock and the way of laid-out steel bars.

本文通过对大量实际工程中的坝后背管资料的收集、归纳和分析，选取了具有代表性的计算模型；用有限元软件ANSYS计算了典型坝后背管结构在实际内水压力作用下的应力分布和裂缝发展情况；以国内几个有代表性的模型试验和有限元计算的成果为依据，分析了在内水压力作用下钢衬钢筋混凝土压力管道管壁裂缝的特点，并尝试总结出此种管道的裂缝出现的原因及其发展规律，同时确定了坝后背管结构极限状态的新的定义方式——以坝后背管的裂缝宽度来定义。

Light output analysis tests character of spectrum radiate of pyrotechnic mixtures and analyses wave band distribute of light by comparing different static blaze spectrograms of the pyrotechnic mixtures. Screen out the better pyrotechnic mixtures according to request of pumping source. Press experiments in airtight erupt container experiment, which simulate the circumstance that pyrotechnic mixtures deflagrate in quartz pipe, realize the press influence to the quartz pipe wall and the disciplinarian of axes press variety. Apply these pyrotechnic mixtures to Nd:YAG lasers as the pumping source and compare pumping efficiency of different pyrotechnic mixtures. Pumping efficiency is an important standard which checkout if these pyrotechnic mixtures are the better pumping source. Sensitivity experiment analysis incarnate security of pyrotechnic mixtures that is the essential parameter in the process of design, manufacture and use.

通过对烟火药的热分析(爆热分析、DTA、TG)，了解备选烟火药反应过程中的能量输出特性及反应过程中的物理、化学变化规律；光输出分析实验对烟火药配方光谱辐射特征进行测试，比较其静态火焰光谱图，分析不同烟火药剂光辐射波段分布特征，根据激光泵浦源的辐射要求，进而筛选更符合激光泵浦源药剂要求的烟火药；模拟烟火药在石英管中爆燃环境的密闭爆发器压力分析实验反映了烟火药在石英管中反应时对管壁的压力影响以及管内轴向压力变化规律；将烟火药作为泵浦源应用于Nd：YAG固体激光器，比较不同烟火药的泵浦效率，作为检验烟火药是否适合作为激光泵浦源的重要标准；感度实验分析体现了各种烟火药的安全性，是烟火药设计、制造和使用的必要示性数。

On the basis of the model experiments and the theoretical analysis of the falsework system, the dissertation builds up a mechanic model of the bridge falsework system, and develops a program on the internal force analysis and stability calculation of falsework system, which realizes the change from the engineers experience to the accurate design by computer.

本文通过支架系统模型试验和理论分析，建立了桥梁支架模板支撑系统的力学模型，并在此基础上开发了支架系统内力分析和稳定性计算程序，实现了从原有的依靠施工技术人员的经验到利用计算机来科学的设计计算和搭设支架。

The works of this period are full of painting language experiments in form, space and material, and we see sparks of what would later form his language matrix, but overall, the Chen Yufei of the '80's was a lonely metaphysicist, focused on using the four-cornered world of painting to extract basic imagery and forms from his daily life and spirit. His pictures had a very strong design feel.

这一时期的作品在造型、空间、材料等绘画语言上有着各种实验，闪现出了他其后的一些基本语言与母题，但总体而言，80年代的陈宇飞属于一个孤独的形而上主义者，专注于用绘画这一四边形的世界从他的日常生活及精神生活中抽离出一些基本的意象和形式，画面有很强的设计感。

The purpose of this action research is to realize the frequency of measurement units appear in mathematics textbook in the elementary school. To design relative curricula of the international system of units , we practice the instructional experiments and evaluate it .

中文摘要本行动研究的目的在了解现行国民小学数学教科书有关量测单位的使用情形，并以国际单位的长度单位入手，设计相关课程，进行教学实验与评鉴，在行动、反省的循环历程中，发展一可行的课程。

The function mathematic models have been establashed to forecast the output, protein and lysine content of the three varieties--"Shannong No.7859","Jinmai No. 5418" and "Baiquan No .3039" and Three areas-- Huixiant Wuzhi and Ximyu.By the quadratic rototion regression, design experiments on the basis of "nonidentical varieties",'nonidentical areas, aud by the models' simulating on the computer, the practical programs of comprehensive agricultural measures of three varieties and th...

本文通过不同品种和不同地点的二次旋转回归试验，分别建立了陕农7859、冀麦5418和百泉3039三品种和辉县、武陟、修武三地点的产量、蛋白质和赖氨酸含量三个性状的二次旋转回归数学模型，并通过计算机模拟仿真，分别筛选出了三个品种和三个地点的小麦高产、优质综合农艺措施实施方案，从而为河南小麦的高产优质栽培提供了依据。

Academic analyze and plentiful experiments are done to design the ultrasonic saddle of ultrasonic suspended gyroscope, power supply of ultrasonic, gyroscope rotor, theory analyze and design have been done in magnetic field circumrotating part and angle acquisition system.

通过理论分析和大量的实验，设计并制作了超声陀螺仪的超声鞍部分、超声激励电源部分和陀螺球，对磁场加转部分和角度读取系统进行了原理分析及设计。

In the experiments, the extraction of the fish scale collagen with pepsin under the acid condition, concerning with three factors: E/S, fish scale s protein concentration and extraction time in a mixed uniform design or a orthogonal design was studied.

以胃蛋白酶，在酸性条件下对鱼鳞中胶原蛋白进行提取，研究加酶量、底物浓度和提取时间3个因素对提取效果的影响。

In the experiments, the extraction of the fish scale collagen with pepsin under the acid condition, concerning with three factors: E/S, fish scales protein concentration and extraction time in a mixed uniform design or a orthogonal design was studied.

以胃蛋白酶，在酸性条件下对鱼鳞中胶原蛋白进行提取，研究加酶量、底物浓度和提取时间3个因素对提取效果的影响。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。