微系统

Institute of Microanalytical Systems, Chemistry Department, Zhejiang University, Hangzhou 310058, China

浙江大学化学系微分析系统研究所，浙江杭州 310058

The multiple access protocol for microcellular systems and recent progress of personal communication network are outlined as well.

讨论了微蜂窝系统的多址接入技术和个人通信网络的研究进展。

The characteristic of machined surface of high speed machining aluminum alloy 7050-T7451 is researched by micrographic experiments and analysis. The formation mechanics of machined metamorphism layer has been analyzed and studied. The dislocation-energy model in machined metamorphism layer was established and applied to explain the micrographic mechanics work-hardening using the thermo-mechanical coupling deformation theory and dislocation theory. The experimental results show that the interaction of high dislocation density effect on hardening is more remarkable than that of thermal stress in high speed machining.

利用显微观察方法对铝合金7050-T7451高速铣削加工的工件表面断面和不同深度的表层的微观形貌特征进行系统的研究，确定了高速切削加工铝合金7050-T7451的表面变质层深度为30～35μm；应用位错能量研究了高速铣削加工过程的热力耦合对变质层的影响机理，并通过微观形貌观察证明：与普通切削相比，高速铣削表层塑性变形的能量和位错密度更高；建立了位错密度的加工硬化的动力学模型，研究了加工硬化的热-力耦合形成机理；对微观裂纹的形成机理进行了理论分析，证明位错密度高的高速切削过程中较低速加工更容易产生明显的微裂纹，从分子级乃至原子级的水平进一步揭示高速切削加工表面变质层的形成特征。

A state-of-the-arts of the mixed gentle MgO of mass concrete technique in dam engineering are reviewed. The merits and defects of the traditional analytic method are discussed. According to the conception of microlevel or mesolevel mechanics and multi-phrase porous media, the study of concrete thermal stress with mixed gentle MgO are generally carried out in this dissertation.

本文综述了大体积混凝土MgO筑坝技术发展现状，在深入研究MgO膨胀机理的基础上，对现有计算方法进行了探讨，利用细观力学的随机颗粒模型方法和基于Biot有效应力的多场耦合／半耦合理论对掺MgO微膨胀混凝土结构温度应力问题进行了系统的研究。

The importance of micromixers for microreaction technology demands some well-founded knowledge on the mixing behavior of these devices, since the flow in a micro-channel is laminar which makes mixing quite a difficult task to complete.

在一些生化反应中，微混合器的重要性在於混合的好坏决定了整个反应系统效率之优劣，因为不完全的混合会严重地影响要完成的反应。

Results show that microseismic monitoring system can be used to analyze dynamic response. It provides valuable reference for study of dynamic response of pavement.

结果表明：微地震监测系统能够对路面结构的振动响应进行监测分析，为进一步研究路面振动响应提供了有价值的参考。

Do you think that you can adapt to use the MIDS?

阁下是否认为自己能接受/适应使用微输入装置系统？

Do you think that the MIDS can replace the traditional input devices in the future?

阁下是否认为微输入装置系统可在不久的将来取替传统的电脑输入工具？

What are the reasons that made you think that MIDS is better?

阁下为何认为微输入装置系统较好？

How much you will be willing to buy the MIDS?

阁下会愿意花多少金钱於微输入装置系统？

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。