实验

With Java as design tool, general principle and step of The design and realization of virtual experiment of statistical Mechanics was instructed through completing the design of two concrete examples: elastic collision model of single particle in a vessel and one-dimensional Brownian motion , and has summarized the experience and lessons in the design process.

摘要以 Java 语言为设计工具，通过完成单个粒子在容器中作弹性碰撞和一维布朗运动两个虚拟物理实验的设计，阐明了设计与实现统计物理虚拟实验的一般原则和步骤，并分析了实验结果，发现我们的模拟与实际实验"真实"的一致。

Digital circuit experiment teaching is very important in the electrotechnics and electronics series experiments teaching.

一、我校数字电路实验教学发展的主要历史沿革杭州电子科技大学是浙江省最早开设数字电路的学校之一，早在80年代就开展有关数字电路CAD的教学和科研，同时开设数字电路实验，所处的电工电子实验中心为国家级电工电子实验示范中心，其水平处于国内领先地位。

The vapour and plasma ignition times of the target are got based on the equation of heat conduction and cascade model. We suppose that the plasma is ignited when 210 generations of new electrons are born in vapour generation time. The influence of temperature on the thermodynamics and optics parameters of material also have been considered in the model. The resulting theory has good agreement with the experiment and overseas report. A blade method to measure the laser spot is given in this paper with validation and error analysis. The plasma threshold of metals in atmosphere and water ambients both are diagnosed with the light deflection and piezoelectric transducer. A Q-switched pulsed Nd:YAG laser operating at infrared (1064nm), visible(532nm) and ultraviolet (355nm) wavelengths has been used. Al、Fe、Cu are used as targets and get a similar results with both method. Theoretical and experimental analyses are applied on the influence of wavelength on the threshold have been done, both of which have shown that the plasma threshold of metals decrease as the laser wavelength increases; The plasma threshold of metals are higher in water than in air and the pressure of the shock wave in water is five times higher than in air.

从热传导方程和雪崩电离机制出发，假设当电子增值2~(10)倍时，考虑了温度对材料热力学和光学参数的影响时，得到了气化和等离子体点燃的时间，利用该模型进行计算得到的结果与国内外报道及自行通过实验测得的阈值基本一致；提出了利用刀刃法测量激光光斑面积的方法，并通过实验进行了验证和误差分析；利用光偏转装置和压电换能器分别对空气和水中金属等离子体点燃阈值进行了实验诊断，激光器均为调Q—YAG激光器(波长1064nm，532nm，355nm，脉宽10ns)，靶材分别为Al、Fe和Cu，两种测试方法得到的等离子体点燃阈值基本一致；本文从实验和理论计算两个方面讨论了波长对等离子体点燃阈值的影响，均得到了等离子体点燃阈值随着波长的增加而减小的结论；对空气中和水中不同环境下金属等离子体的点燃阈值进行了比较研究，得到了金属在水中的等离子体点燃阈值比空气中的大，且水中产生的冲击波的压强是空气中的5倍左右的结论。

Current," of be enslaved to be enslaved to of a few teachers should try those who teach " to manacle, fail to implement new course concept well in education, do a test in order to say the experiment is replaced, although do a test,also be to deal with finish sth, the phenomenon that experimental effect fails to get thorough mining still very general.

目前，一些教师受制于"应试教育"的束缚，在教学中未能很好地落实新课程理念，以说实验代替做实验，即使做实验也是应付了事，实验的功效未能得到深入挖掘的现象仍很普遍。

At last, 2KVA - experimental prototypes of AC power supplies of multiple-loop analog and digital control system have been made. Fast dynamic response and load compatibility have been verified by the experiment of step change in the load and under rated full-wave diode bridge rectifier load.

最后各研制了一台2KVA的多环模拟控制系统逆变电源实验样机和数字化控制系统逆变电源实验样机，切换负载实验和负载适应性实验分别验证了逆变电源系统具有良好的动态性能和负载适应性。

Therefore it is necessary to research the mechanism of greensand used for high compacted molding methods thoroughly.This subject is one section of the National Natural Science Foundation subject ""Ivestigation on Predicting Method and Mechanism of Springback for High Compacted Sand Molds"", followed of the other completed one named ""Research on Microdeformation of Molding Sand"". A serious of experiments has been done on the reequipped three axial machine under certain technological conditions, and the mechanics, material science, rheologic science. It is systematically studied that the influences on the springback of sand mold were caused by the main influence factors: pressure, compacted rate and the content of soil. Through the analyzed experiments' data, the experienced stress-strain relationship concerning the main influence factors were obtained;under different technical parameter, the springback and spingback's potential energy are compared, the differences and indifferences between them are found out, and the springback's mechanism is discussed;according to the tests' data of YangGuoping coming from Tinghua University, experienced formula of molding sand's springback displacement is induced, the displacement and springback are compared, the margin of error's reasons are analyzed, and they are tested and verified mutually.

本课题为国家自然科学基金项目"高紧实度砂型预测方法及回弹机理的探讨"的一部分，是已结题的国家自然科学基金项目"铸造型砂微变形的研究"的后继，运用力学、材料学及流变学理论，利用改装的三轴仪，在一定的工艺条件下，作了大量系列实验，系统的研究了压实比压、紧实率和膨润土含量对砂型回弹的影响；对实验数据进行了分析和处理，得出了型砂关于压实比压、紧实率和膨润土含量的本构关系的经验公式；把各工艺参数下的型砂产生的回弹量与回弹势能进行比较，找出两者存在的异同点，并对回弹机理进行了探讨；通过清华大学杨国平的实验数据，推导出型砂回弹位移场的经验公式，并与实验测出的回弹量进行比较，分析误差造成的原因，并互相进行了验证。

The synthesis and application of Grignard reagent play a very important role in the teaching of the organic chemistry and organic experiment. The students must hold the experiment on synthesis of Grignard reagent which has been placed on the organic experimental books.

格氏试剂的制备及其应用在有机化学及实验教学中占有非常重要的地位，是学生必须掌握的一类实验，是各类有机化学实验教材中必列的实验内容。

Finally, through two lines superimposed experiments screening direction different points finish experiments, half of the tone color Points configuration with Rose Cod extent of the relationship as a series of pilot experiments proved moiré and moirés produced have different patterns in terms of technique, visual.

最后，通过两组网线叠加实验，网角方向不同的网点叠加实验，半色调网点排列的位相与玫瑰斑可视程度的关系实验等一系列实验，论证了龟纹的产生和龟纹在不同叠加角度下，可视程度的不同，证实了通过一定的加网度，可最大限度地避免龟纹产生。

The results showed that the experimental curricula of our faculty have many disadvantages, such as limited types of evaluators, outdated approaches for evaluation, less characteristics and incomprehensive evaluation system, which need to be improved. Thus, according to the teaching methods and characteristics of our four-leveled experimental curricula i.e.

因此，针对华东师范大学生命科学学院构建的基础生物实验课程、探究型综合生物实验课程、开放型专题研究实验课程和实践活动这四个层次的实验课程的教学组织方式和特点，以每个层次中的一门课程为代表，分别设计了相应的学习评价体系。

The level of tPA before and after treatment was not significantly different .Me made the conclusion that tPA had no effect on sperm\' growth , migration and maturation .However we found that the level of uPA in seminal plasma of health adult and patient had statistics difference(P.01). The health adult\'s level of uPA in seminal plasm was higher than patient\'. The level of uPA was improved after treatment and has statistics difference(P 0.01). The incrementation of upa had linear correlation with incrementation of sperm motility of

根据实验研究结果，再结合上述的病机假说，我们认为本实验证明了少、弱精性不育患者精浆中出现了"精瘀"的中医微观证，"精瘀"为其主要的病理变化；在病机演化中，肾虚是不育疾病之本，血瘀是肾虚的继发病理产物，血瘀日久会导致肾虚；并对肾虚-血瘀-不育三者关系作了理论探讨，对聚精汤的(来源：A5a2a2aBC论文网www.abclunwen.com)组成药物进行了本草析微、方义剖析，得出补肾活血法治疗此疾病不但有理论基础，也有实验依据，补肾活血法是治疗这类疾病的有效法则；还提出可以把uPA看作"精瘀"的实验指标，这对男性不育的病因分析、疗效观察、预后判断有一定的来源：A7676BC论文网www.abclunwen.com

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。