实验

The plasma ignition threshold of metal is got through experimental and numerical study. 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 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210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著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。

The blood pressure of the rats was monitored to find out the possible mechanism of anxiolytic effects of Ningxin compound extract.

通过悬尾实验、强迫游泳实验、高台十字迷宫实验评价宁心的抗焦虑活性，并通过宁心对外源性升压物质的影响作用实验探讨宁心的抗焦虑作用机制。

Temperatures in the room and on the chipboard were measured, and the heat release rate based on the principle of oxygen consumption was acquired. The velocity of the fire spreading on the chipboard w...

结果表明，进行大尺度标准火灾实验房间内阻燃材料的性能测试实验能够获得全面数据；释热速率是评价材料阻燃特性的重要指标；大尺度标准火灾实验房间内实验对全面评价阻燃材料在火灾中的阻燃性能具有重大意义。

The four experimental virus strains and the three collate virus strains were divided into two groups, and belonged two evolutionary branches. Although ADV-DL1, DL2 and DL3 were all belonged to the Da Lian separated strains, they had the ulterior genetic relationship. The nuclear sequences of the obtained experimental ADV virus strains, ADV virus collate virus strains and typify virus strains of other four Parvovirus generic were cladogram analyzed with the Clustal W method of software DNA Star.

结果表明，ADV-Utah与四个实验毒株的序列同源性较高，同源率为92.9-93.4％，ADV-G、ADV-SL3与实验毒株的同源性较低；四个实验毒株和三个参考毒株被分别划归为两个组，分属于两个进化分支；实验毒株中ADV-DL1与DL2和DL3虽然同为大连分离株，却表现出较远的亲缘关系。

It also provides a unique practical measured curves,It'll give a new measurement technology, which has replaced old a experiment instruments for the reform of educational experimention circuit of low frequences.

计算机辅助电路实验系统》将为&电路分析基础&教学实验的改革，及相关学科的实验测试，提供一种全新的测试技术与实验手段。

By studying the design of other experiment machine, I took drill machine as the base and power, and then devised the measure equipment and experiment equipment that is can be used to research the friction and abrasion between piston ring and cylinder.

然后深入探讨了活塞环-缸套之间的摩擦磨损的特点，结合有关试验机的设计方案，利用钻铣床作为实验台和动力源，自行设计了适用于研究活塞环-缸套之间摩擦磨损的实验和测量装置，丰富了实验手段，利用它可以设计进行多种工况、载荷、转速条件下的实验方案。

Our marine biotechnology development urgently need to address the innovation-based research tools and contents: Controlled ecological experiments with the combination of indoor experiments, carrying out key species life history, experimenting ecological experiments ,measuring the value of the main types of resources and energy gainings, etc.

受控生态实验与室内实验相结合，开展关键种生活史、实验生态实验，测定主要资源种类的比能值、能量收支等，是我国海洋生物技术发展迫切需要解决的创新型研究手段和研究内容；简化食物网研究是有效认识海洋生态系统的新型议题。

At the same time, the paper also describes the confirmation of experiments project, the design of experiments installation, the choice of some measurement instruments. After finishing the experiments, some important conclusions are obtained, which are beneficial to set up the mathematical model about measuring force and wheel deformation accurately and reliably.

同时，论文中还叙述了滚轮变形标定实验方案的确定、实验装置的设计和主要测量仪器的选择，并对实验数据和结果进行了详细的处理和比较，得出了一些重要的实验结论，有利于准确、可靠的建立滚轮变形与测量力之间的最终数学模型。

In order to understand the sorption and diffusion behaviors on mudstones , experiments including solid analysis, batch tests , kinetic sorption/desorption test and column diffusion test.

实验内容包括泥岩的固相分析、等温批次实验、动力吸脱附实验、以及管柱扩散实验。

3D interaction network courseware places the users to real experience surroundings,which the 2D courseware hardly possible to realized.Along with the development of the computer and the Internet technology,3D interaction network courseware possibly will be the trendiness in the teaching software field under the development of the computer science and the Internet technology.

1研究背景物理是一门以实验为基础的学科，物理实验教学的任务是通过实验加深学生对物理知识的认识，培养学生理论联系实际的能力让学生学会常用的物理实验方法和测量技术，提高学生的实际操作技能和独立工作的能力同时使学生掌握科学研究的一般步骤、方法，学会合作，努力创新。

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。