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This article first antenna, microstrip theory, the circular polarization technology, the theoretical discussion, in this based on the microstrip antenna of circular polarization method - corner square microstrip antenna, and has done a design simulation , and then do the design and further research to improve and eventually get a resonant frequency (S11 reflection coefficient corresponding to the minimum frequency) for the 1.5GHz and 1.43GHz, the frequency of circular polarization for the 1.46GHz, S11 is less than -10dB relative bandwidth, the VSWR is less than 2 is about 8.8% relative bandwidth, axial ratio less than 3dB relative bandwidth of about 2.2% of the right circular polarization microstrip antenna design case, which proved very good the circular polarization microstrip antenna theory, also fully confirmed by a square corner design is a practical program, and select the appropriate regulation of sticks is indeed able to improve the performance of the antenna.

本文先对天线、微带理论、圆极化技术等进行了理论论述,在此基础上,提出圆极化微带天线的实现方法——切角方形微带天线,并对此做了设计仿真,后又对这一设计方案做了改进及进一步研究,最终得到一个谐振频率(反射系数S11 的最小值所对应的频率)为1.5GHz和1.43GHz,圆极化频率为1.46GHz,S11 小于-10dB 的相对带宽、驻波比小于2 的相对带宽约为8.8%,轴比小于3dB 的相对带宽约为2.2%的右旋圆极化微带天线的设计案例,从而很好的印证了圆极化微带天线理论,也充分证实了切角方形是一种切实可行的设计方案,而选取合适的调节枝则确能提高天线的性能。

The theory is applied to Tahe oilfield and an oil well tested twice is interpreted by it. The case study indicates that the theory has a good practicability and a consistency with field conditions.

将该理论在塔河油田进行了实际应用,并对一口进行过两次测试的油井的渗透率变化进行了计算,计算结果表明,该理论实用性较强,和油田实际符合较好。

Hereinto, the study of Multi-Agent simulation of economies based on the complex adaptive system theory is an important research branch of the complexity of economy.

首先,由于现实经济中涉及的因素众多,相互关系复杂,给数学方法的运用带来了一定困难;其次,传统方法没有很好地解决经济系统的层次性结构问题,因此,无法对不同层次的特性差异给予一个整体性的解释,也就产生了宏观、微观相互脱节的理论体系上的缺陷;再次,传统经济理论对现实经济普遍存在的信息不完备与不确定性尚不能给予系统的解释;最后,传统经济中以观测数据为基础的经验主义的研究方法,无法深入了解经济的微观运行过程,从而降低了理论对现实的解释与预测能力。

A good example of this is found in the kinetic molecular theory, in which gases are pictured as being made up of many small particles that are in constant motion.

这方面的一个好例子就是分子动力学理论,这个理论把气体形容成是由许多不断运动着的微小粒子构成的。

According to theoretical analysis, it is convergent and has good convergence if the coefficient matrix is a nonsingular matrix. Moreover, examples have been implemented on HP rx2600 cluster, and the data verify that the numerical results of this algorithm coincide with its theoretics.

在理论上,算法只要系数矩阵A是非奇异矩阵就能够收敛,而且有较好的并行性,在HPrx2600集群上进行数值试验,验证了算法的计算结果与理论相一致。

The experimental results indicated that these metal oxide catalysts had better catalytic activities to the methylene chloride gas at low concentration, and the catalytic activities increased with the increase of temperature,but decreased with the increase of inlet gas concentration. The CrO3/potsherd catalytic activity was better than V2O5/potsherd, and the CrO3/potsherd catalyst displayed higher activity at the relative low temperature. When the reaction temperature was 320 ℃, the conversion rate could reach 99%, and the result of 100h catalyst stability experiment show that the catalytic activities have good stability.

实验结果表明此类金属氧化物催化剂对低浓度CH2Cl2气体有较好的催化活性,催化剂的活性随温度升高而升高,随入口废气浓度增大而降低,其中CrO3/陶瓷片催化剂的催化活性比V2O5/陶瓷片催化剂的活性好,CrO3/陶瓷片催化剂在较低温度下就表现出较高反应活性,在反应温度320℃时,转化率即达到99%,同时催化剂100h稳定性实验结果表明催化剂活性有很好稳定性,为进一步工业化应用提供理论和实践依据。

Voltaire 伏尔泰英文:If we have a correct theory but merely prate about it, pigeonhole it and do not put it into practice, then that theory, however good, is of no significance.

如果有了正确的理论,只是把它空谈一阵,束之高阁,并不实行,那末,这种理论再好也是没有意义的。

The primary studying works and characteristics:1 To summarize reinforcing theory of cement mixing pile composite foundation2 To analyze the primary mechanics characters and changing rules of cement mixing pile, based on analysis of test data both indoor and outdoor.3 To discuss siding frictional resistance, ending resistance, ultimate bearing capacity of simple mixing pile and effectiveness factor of grouped piles, loading ratio of soil between piles under cushion cap of grouped piles and stress ratio of pile and soil and so on, and use many computation method and experimentation method to ensure bearing capacity of mixing piles composite foundation.4 To point out and analyze eight sides flaws and problems of the bearing capacity calculation method of mixing pile compositefoundation which ensured by national and normative method/ formula.5 To apply test results of loading tests and a few settlement observation data, use gray theory to predicate ultimate bearing capacity of deep mixing piles, actual example demonstrate engaging between theoretical predicted value and actual value.6 To apply groovy layerwise summation method to discuss entity piles method, double foundation method, equivalent layerwise summation method and consolidation theoretical method and so on, especially by combination of engineering example, use FEM to calculate or discuss the settlement and changing rules of composite foundation.7 To discuss problems of critical length of composite foundation by combination of engineering example and numerical analysis method, and analyze the contrast of critical length between simple pile load and most area load of composite foundation, not only critical length of composite foundation is relative to modulus ratio between piles and soil, but also upside load distribution area of composite foundation.

主要的研究工作与特色为:(1)总结了水泥搅拌桩复合地基的加固原理;(2)在对室内外试验资料进行统计分析的基础上,系统分析了搅拌桩水泥土的主要力学特性及其变化规律;(3)探讨了搅拌单桩的侧摩阻力、端阻力、极限承载力及群桩效率系数、群桩承台下桩间土荷载分担比及桩土应力比等,提出用多种计算方法并结合试验方法来综合确定搅拌桩复合地基的承载力;(4)明确指出和分析了按国家有关规范的方法确定搅拌桩复合地基承载力所存在的八个方面的缺陷与问题;(5)利用过去没有加载至破坏阶段的载荷试验成果和较少的沉降观测数据,尝试了用灰色理论预测深层搅拌桩的极限承载力,实例表明理论预测值与实测值吻合较好;(6)在常规分层总和法的基础上,探讨了复合地基沉降计算的实体墩基法、双层地基法、等效作用分层总和法、固结理论法等,特别是结合工程实例,用有限元数值计算等方法计算和讨论了搅拌桩复合地基的沉降及其变化规律;(7)结合工程实例,用数值分析方法探讨了复合地基临界桩长的问题,指出和分析了单桩荷载下的临界桩长与复合地基大面积荷载下的临界桩长存在很大的差别,复合地基的临界桩长不仅与桩土模量比有关,而且与复合地基上部荷载分布面积有关。

The present theory has also been applied to study the dielectric breakdown of polymers, the theoretical results agree well with the experimental data of polyethylene terephthalate films.

应用该理论还讨论了高聚物的电介质击穿,理论结果与聚脂薄膜的实验结果很好吻合。

It is believes that the ETS-based theory of protocol conformance testing is able to be the foundation of protocol conformance testing.

实践证明,基于ETS的协议一致性测试理论能够很好地成为构造通用协议一致性测试系统的理论基础。

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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。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力