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Abstract: Using the criterion of the free energy,we prove that the mechanical equilibrium condition for liquid droups on the condenser surface depends on the angle of contact (α).For α>90° the chemical potential of liquid drops on the condenser surface is
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文摘:应用自由能判据证明了冷凝器壁面液滴的力学平衡条件与接触角有关，进而证明了当壁面液滴与壁面的接触角大于90°时，冷凝器壁面液滴的化学势将小于同曲率的球形液滴的化学势；另外，在相同饱和比下，壁面液滴的临界半径也小于球形液滴的临界半径.而在接触角小于90°时，情况则恰好相反.正是由于这双重原因，使得滴状冷凝的传热性能大大优于膜状冷凝的传热性能，并由此求出了冷凝器壁面液滴的最佳接触角. |
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Abstract: Using the direct finite difference method,the formulations of phase-change heat transfer in different situations have been given.On the basis of these,a general formulation is proposed to describe the source of solidifying heat transfer.As an ex
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文摘:应用直接差分方法对相变热源项进行处理，给出了各种不同情况下的计算式.在此基础上，给出了一个通用的计算公式.最后应用该方法计算了钢液的凝固传热，计算结果与物理过程吻合很好. |
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Abstract: Using the documents and materials concerned,the study on the possibilities of developing woman 3000-meter steeplechase in China was made in following aspects: the spiritual and character factors of Chinese female athletes,the bodily form feature
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文摘:综合运用文献资料方法，对我国开展女子3000米障碍跑的可行性，从我国女子选手的精神品质因素、中长跑项目的水平与基础、我国女子中长跑选手身体形态特征以及我国开展新设项目的经验方面进行研究，并对我国开展女子3000米障碍跑项目提出看法和建议。 |
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Abstract: Using the notion of fuzzy point, the concept of weak implicative ideal is introduced, and the equivalence between fuzzy implicative ideal and weak implicative ideal, weak ideal and weak implicative ideal are also given.
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文摘:运用模糊点的概念,引入了弱关联理想的概念,给出了模糊关联理想与弱关联理想、弱理想与弱关联理想的等价关系. |
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Abstract: Using the ray-tracing method,we demonstrate that a grating-telescope stretcher is the conjugation of a grating pair compressor.We present an analytical formula for calculating the phase dispersions of the grating-telescope stretcher.The computer
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文摘:用光线追迹法论证了光栅-球面镜系统与普通的光栅对系统是一对相位共轭元件，并提出了光栅-球面镜系统色散的解析计算公式，以及对一个典型的放大系统做了模拟.模拟结果表明，对于一个放大系统，存在一个最佳的材料色散，用它可以获得最大的无色散带宽. |
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Abstract: Using the united method in this paper, the bending solution of the rectangular plate with one edge built-in and one or two corner point supported can be derived under arbitrary load.
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文摘:本文的统一解法可以解决悬臂板或带有角点支承时在任意荷截作用下的弯曲。 |
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Abstract: Various factors affecting the yield of packaging process of high speed switching diodes were analyzed on die structure and packaging process of devices, and steps have been taken to improve the yield of the dioldes.
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摘要：从器件的芯片结构及封焊工艺入手，分析了封焊工艺影响成品率的各种原因，并采取相应的改进措施，提高了器件的成品率。 |
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Abstract: Various measures for anti-interference for embedded control system are stated for enhancing the capability of the system.These include power supply, grounding, isolated input and output channels and circuit design.
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文摘:主要对嵌入式控制系统在抗干扰方面提出了各种措施，包括电源、接地、隔离输入、输出通道，以及在电路设计上采取了措施，以求提高系统的抗干扰能力。 |
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Abstract: Various parameters concerning water quality and atmosphere in environmental monitoring and control and the applications of sensors in this field is introduced.The fundamental principles of optic fibre sensors,thick film micro-sensors,biosensors,
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文摘:介绍了环境监控中水质和大气两个主要方面所涉及的参数及传感器在该领域中的应用，并简单的描述了光纤、厚膜微型电极、生物、电化学、光、半导体氧化物等六类传感器的基本原理。 |
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Abstract: Virtual instrument is the advanced technique in measurement field.It has typical development steps based on the hardware,software,bus structure etc.
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文摘:虚拟仪器是当今仪器仪表发展的趋势，根据硬件结构、总线结构、开发平台的不同，虚拟仪器系统有一套典型开发步骤和系统构建方式。 |
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Abstract: Virtual manufacturing (VM), the landmark of information era, is the all-sided innovation caused by modeling and simulation technologies in traditional manufacturing.
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文摘:虚拟制造是信息时代制造技术的重要标志，是建模与仿真技术对制造业的全方位改造。 |
