物理过程

A new theoretical model has been developed to describe the whole ablation process,including the effect of dynamic absorptance and evaporation.

提出了描述整个飞秒多脉冲激光烧蚀过程的物理模型，模型考虑了多脉冲烧蚀的新的特点，考虑靶材吸收率随温度的变化和蒸发效应，建立了激光烧蚀不同阶段的热传导方程，给出了相应的定解条件。

Mainly, the article divides into six contents: system development background and method of exploitation, demand analysis, system analysis, system design, system implementation and conclusion. In demand analysis, has established first with the example model, and comes the detailed description through the active chart to use the example. Through the sequence chart and the VOPC chart, I completed the definition of boundary, control and data entity of the fore-platform in system analysis. The system design mainly has carried on the detailed design to kind of and the database.

在需求分析中，先建立了用例模型，通过文字和活动图来详细的描述用例，确定了前台子系统的各个功能模块；系统分析中，使用序列图和VOPC图完成了对系统运作过程中涉及的界面、控制、数据实体的定义；系统设计主要主要对类及数据库进行了详细的设计；系统实施中，对前台子系统的物理部署、实施环境进行描述，包括系统的主要界面和部分代码。

High-order harmonic radiation with noble gas and N〓 in static gas target has been obtained, and the effects on high-order harmonic efficiencies due to laser intensities , polarization, gas densities, confocal parameter, media characteristic and phase mismatch have been discussed. The experimental results show that the high-order intensities grow with the incident laser intensities and gas densities, and high-order harmonic signals amplify in the same time.

高次谐波辐射是强场物理中与电离过程相伴而生另一种重要过程，本文利用飞秒激光在静态气室中获得全部的稀有气体原子以及氮双原子分子5到21次的谐波发射，着重讨论了激光功率密度、激光偏振、气体密度、共焦参数、介质本身以及相位失配对高次谐波转换效率的影响。

Soil erosion is the process of that soil particles with surface attachments are moved, transferred and deposited under external forces, such as water power, gravity and wind power, physical, chemical weathering and eluviations, including human beings activities.

土壤侵蚀是指在外营力作用下，土壤颗粒及地表附属物被剥蚀搬运、迁移、沉积的一个过程，侵蚀的源动力来自于水力、重力、风力、物理或者化学风化、淋溶过程，人为活动也是一个重要的源动力。

The distribution uniformity of external magnetic field is weakened by the cylindrical coil with some thickness ferric-core. The model of fluid flow and heat transfer of spot GTAW pool in longitude magnetic field controlling is developed for the first time, which incorporates the free surface, surface tension gradient, additional fluid drive forces owing to the external longitude magnetic, heat transfer between weld pool and medium, latent heat of solid/liquid phase and heat physical properties of materials.

综合考虑了焊接熔池表面张力温度系数的变化、熔池自由表面变形、外加纵向磁场对熔池流体的附加作用力、熔池与周围介质的换热、固/液两相区的熔化潜热、焊接材料的热物理性能等问题，将熔池自由表面变形、外加纵向磁场与熔池流场的计算过程相耦合同时进行分析，模拟了不同焊接材料、不同外加磁场以及不同焊接条件下外加纵向磁场GTAW定点焊接熔池流体流动与传热过程。

The Doppler effect of moving scatterers causes the radar signals to appear as stochastic processes. Some useful knowledge about the clouds and precipitations can be obtained by analysing the statistical characteristics of these processes.

运动质点的多普勒效应使它们散射的雷达信号呈现为一种随机过程，对这随机过程的统计特性进行分析就能够推断云和降水的微物理或运动学的状况。

A set of equipment of real-time measurement of aerosols concentration was established to survey of the diffusional and migratory behavior of aerosols in diffusion batteries by using aerosol counting instruments and chromatography analysis.

中国工程物理研究院核物理与化学研究所，四川绵阳 621900摘要气溶胶粒子在毛细管中的输运过程是一个谱带展宽的过程，影响谱带展宽的因素大体上可分为柱内和柱外效应两大部分。

Based on the analysis of working process of ejection gun of rocket ejection seat ,the physical and mathematical models of interior ballistics of ejection gun were established and the interior ballistics parameters of a rocket eject seat were validated by test and calculation.

在分析火箭弹射座椅弹射动力系统的工作过程的基础上，建立了其内弹道的物理模型和数学模型，并对某型火箭弹射座椅弹射动力系统内弹道进行了试验验证与计算，试验所测膛内气体压力随时间变化曲线与计算曲线基本吻合，弹射过程最大压力pm、工作时间tg、出口压力pg和出口速度vg分别为24.20(24.57)MPa，157(155)×10-3s，22.27(21.83)MPa，16.61(16.59)m.s-1，各特征参数的计算值最大误差小于3%。

The longitudinal and transverse tensile strengths of the sampl e reached 1464 and 1402 MPa, and elongations 20.3% and 29.7%, respectively. The solidification mechanism was discussed and a physical model base...

讨论了往复式扫描激光熔化沉积过程中&之&字形胞状组织的凝固过程，并建立了基于胞晶择优外延生长的物理模型。

Besides, I also introduce the message frame format, service type and the procedure of transmission. And I analyze the function of slave station, State Machine and the procedure of communication with Mater Station clearly. We can implement the protocol by using software or hardware.

正是基于这种现状，文中对PROFIBUS通信协议作了深入研究，介绍了物理层、数据链路层和应用层协议，并且详细阐述了报文格式、服务类型及传输过程，透彻分析了DP从站的功能、状态机及它与主站通信的详尽过程。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。