优缺点

The basic principle, advantages and disadvantages of the II were summarized. Computer-generated II based on 3DS MAX was proposed. The captures of three-dimensional information for II using 3DS MAX simulation and the display of three-dimensional information using an experiment assembly composed of a display screen and Fresel lens arrays were realized, respectively. The combination of the simulation and experiment resolved the flipping and crosstalk in conventional II.

介绍了集成成像技术的基本原理及其优缺点，提出了一种基于三维设计和动画制作软件3DS MAX的II技术，利用3DS MAX来实现II的三维信息的记录，利用显示器和菲涅尔微透镜阵列组成的实验装置实现II的三维信息的重现，解决了常规II技术存在的空间反转和串扰问题，从而研制出基于II技术的原理性裸眼三维显示器。

Points are given precise trigonometric leveling instrument to replace second-class standard of measurement of geometric conditions, the method reduced errors, and improve the accuracy of the advantages and disadvantages of the measures.

给出了站仪精密三角高程测量替代二等几何水准测量的条件、减弱误差的方法、优缺点及提高精度的措施等。

Meanwhile,the limiters for various types of non-orthogonal elements are proposed,and an implicit scheme for DG finite element method is developed also.

鉴于有限元方法内存需求大和计算效率低的不足，在分析有限元和有限体积方法的各自优缺点的基础上，综合二者的优势，提出了有限元/有限体积区域混合计算方法。

This paper discusses the temperature distribution in the accelerating structure of a 20MeV electron linac designed for medical use.

本文分析了一种20MeV电子直线加速器中的温度场分布，查明了目前所用具体结构与恒温冷却方式的质量水平，并与国外某些加速器所用的单向流动冷却方式在优缺点方面作了对比。

On the ground of comprehending the mechanism of fiber filtering and the characteristic of other fiber-filters,the characteristic and the function of long-fiber filtering was studied by the comparison between long-fiber filtering and sand filtering in this article.

在深入了解纤维束过滤机理和总结现有各种纤维束过滤器优缺点的基础上，通过长纤维过滤与传统石英砂过滤的对比试验，详细论述了长纤维过滤较之石英砂过滤的技术特点与性能优势。

Firstly, the realizable ways of signal detection and sample、 power circuit and the application of low-consumption model of MSP430 are discussed, by which the required function of current protection and voltage protection can be realized. Secondly, different protection algorithm based on micro-computer are discussed in this article, and from the virtues and defects of Fourier algorithm, an improved algorithm is put forward, and the importance of the improved algorithm is displaced. Thirdly, according to the national standard of GB/T18858 .3-2002, the principle of networklization of intelligence trip relay and how to realize it are mentioned. Lastly, using the current conditions, the test of precision is done. The experimental date present that the system is working well and can realize the real-time function of on-line detection.

首先在硬件设计上，对于信号检测、处理、电源电路、MSP430系列单片机的低功耗方式应用以及人机接口电路等问题提出了实现方法，基本实现了大范围电流、电压信号实时监控等功能；其次，本文还对当前各种微机保护算法进行了介绍，分析了傅立叶算法在实现智能脱扣器保护功能中的优缺点，并针对傅立叶算法中计算偏于复杂的问题对该算法进行了改进，提出了基于FFT的改进算法，通过算法的分析和比较，对改进算法的性能给出了评价；然后结合我国现场总线国家标准GB/T18858.3-2002讨论了DeviceNet现场总线在实现脱扣器网络化的原理，实现方法，论述了通讯接口电路的设计；最后利用现有条件，对装置进行了性能测试，试验数据说明系统工作状态较好，可以满足低压配电网自动化对低压脱扣器的各项要求。

Based on ASME PTC6 Turbine Performance Acceptance Test Code,the principle of calculating the specific enthalpy of exhaust steam from low-pressure cylinder has been determined.

根据ASME PTC6汽轮机性能验收试验规范确定低压缸排汽比焓的计算原则，介绍了目前国内外对计算低压缸排汽比焓及热力过程线的4种处理方法，并对各种方法的优缺点进行了具体的分析。

Through studying the math model and "man- plane-environment" operation system model, we analysed the usage range and virtues and defects of transmitting function model of human, optimal con- trol model and fuzzy control model;After analysing "man-plane-environment" operation system, com- puter simulation, we put forward the man- plane -enviroment operation system computer simula- tion evaluation system to determine the best match between pilot and plane.

摘 要：通过对人-飞机-环境模拟仿真技术中人操作者的数学模型及&人-飞机-环境&操纵系统的数学模型的研究，具体分析了人的传递函数模型、最佳控制模型、模糊控制模型的适用范围及优缺点，并在对&人-飞机-环境&操纵系统的数学模型、性能指标进行分析后，提出了确定驾驶员和飞机之间最佳匹配的&人-飞机-环境&操纵系统计算机模拟综合评估系统，从而使人们一开始设计飞机时就考虑驾驶员作用，减少设计盲目性，缩短设计周期。

After analysis on the process limitations existing in three manufacturing methods for metal micro-precision sieves, an optimized UV-LIGA technique based on SU-8 photoresist is presented to manufacture the micromesh nickel sieve-sheets.

分析了现有的精细金属网板制造工艺的优缺点，并提出采用基于SU-8光刻胶的UV-LIGA技术来制备高开孔率大厚度精细金属网板的工艺思路。

The application of fish, frogs, and minks as sentinel animals for human health risk evaluation of environmental contaminants was reviewed in this paper, and their merits and disadvantages and applicable ranges were discussed, respectively. Finally, we suggested that ecotoxicological survey on sentinel animals in China should be developed to promote human health risk evaluation of environmental contaminants.

论文对作为前哨动物的某些鱼类、两栖动物和哺乳动物在环境污染物人体健康风险评价中的应用进行了简要概述，讨论了它们作为前哨动物各自的优缺点和适用范围，最后建议在国内大力开展前哨动物生态毒理学调查，以促进人体健康风险评价工作。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。