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Some new basic concepts are proposed in this paper, including the approximation space of generalization, rough approximation axiom, disturbance set axiom, classification principle of rough set, principle of nondeterministic even set, principle classification, bit quantum symmetric classification, of concentration, game classification, quantum logic incomparable set, bit space set, protocol relation, rough set function of protocol relation, rough classification algebra, rough simple algebra, etc., and a guess is also proposed.

提出了广义近似空间、粗近似公理、干扰集公理、粗糙集的分类原则、粗选原则、不确定偶集原则、精选原则、对策分类、量子逻辑分类、bit量子对称分类、不可比集、bit空间集、协议关系、粗糙集函数、粗糙分类代数和粗糙单代数等基本概念,并提出了一个猜想;展示了一些新观点;基于协议关系构造了粗糙商代数和粗糙子代数,给出了回避-归并算法及算例。

On the aspect of urban spatial distribution DM: Adopting the conception model of combination of location and attribute, the author brings spatial coordinates, spatial relationship and attribute character into the unitive model of spatial computation, studies city's land suitableness evaluation and the method of spatial clustering in division of urban function districts and brings forward the arithmetic of classification layer. Aiming at land spatial optimization allocation, the author puts forward SGA. In this arithmetic selection, crossover and mutation operator are progressed on the space.

在城市空间分布数据挖掘方面:采用空间—属性一体化概念模型,把空间坐标、空间关系和属性特征纳入到统一的空间计算模型,分别对城市土地适宜性评价和城市功能区划分中的空间聚类方法进行了研究,并提出了一种分类图层的平滑算法;针对城市土地的空间优化配置,提出了一种空间遗传算法,该算法中的选择、交叉、变异算子都是在空间上进行的;对多要素离散空间场之间的相关性测度,定义了一种基于信息熵的规范的相关指数,并给出了计算方法。

In the sense of Von Karman large displacement, the governing equation of nonlinear dynamic response of the clamped circular plates under impact of a mass is established by using the virtual displacement principle and Galerkin's method in this paper. The effect of coupling between the impact load and the displacement of. the circular plates is considered. The governing equation is solved by applying the time increment method and the singular perturbation theory, and the asymptotic solutions of nonlinear dyna...

本文在Von Kármán大位移的意义上,利用虚位移原理伽辽金方法建立了圆板在物体撞击下的非线性动力响应的控制微分方程,在研究响应问题时,考虑了冲击载荷与圆板位移响应之间的耦合影响,文中使用时间增量法和奇异摄动理论求解问题的控制方程,获得了固支圆板非线性动力响应的近似解,并且求解了具体算例,绘出了圆板位移、应力响应曲线以及冲击力随时间的变化曲线。

In this thesis, by the means of calefactive oxidation test of coal samples, the characteristics of different samples spontaneous combustion are analyzed; the infrared spectrum is assimilated to review the rule that coal function corps change in the process of coal low-temperature oxidation ; by the means of thermal analysis by differential scanning calorimeter, thermogravimeter, the kinetic function of coal low-temperature oxidation in spontaneous combustion process are analyzed , depend on the device, the mathematical model of coal spontaneous combustion is developed, the model are dealt with, Finally, the temperature field and the velocity field with velocity of the entry flow is got.

论文通过煤的低温氧化和自燃过程,实验研究了煤的低温氧化气体产物特征和变化规律,研究得出了煤的低温氧化过程中气体生成量与氧气消耗量与煤温之间的指数关系式;在煤的低温自热氧化过程中,对煤的官能团等化学结构的变化研究,揭示了煤炭低温自热氧化化学基团变化规律;采用非等温TG和DSC法研究了烟煤低温氧化动力学,得出了煤低温氧化分布活化能及煤低温氧化机理函数的变化规律;建立了煤低温氧化自热数学模型,并对该模型进行数值解算,可得煤样的温度场与速度场随入口风量变化情况。

Firstly, material of different kinds of door and window is analyzed, and their diathermanous characters and factors of influence to energy-conserving are also discussed. Secondly, developmental state of outer door window of the present domestic architecture is analyzed, besides, the investigate and survey of the relevant situations of energy-conserving door window in Changsha is carried through. Energy-saving effect and economic benefit of different outer door window are compared with each others by means of example of calculation. And the feasible theory in energy-saving design of outer door window and practicability method and measure are all discussed.

文中首先分析了各种门窗材料特性并探讨了门窗的传热特点、以及影响门窗节能的因素;其次对目前住宅建筑外门窗发展的现状进行了分析,并在长沙地区进行节能门窗相关情况的调研;通过算例,对采用不同节能措施的外门窗的节能效果与经济效益进行了对比;探讨了外门窗节能设计中可行的理论和实用性方法措施。

The IPOs of Fortress and Blackstone three years ago were signs the equity bubble was nearing its peak. Those who invested in Fortress when it went public have so far lost three-quarters of their money. In the first two years after the offering, the stock plummeted 95%. As for Blackstone, the stock has halved since the IPO. Even when you include dividends, ordinary investors have lost more than $2 billion. The Chellonese government also got hosed: It bought a 10% stake around the same time through the inaptly named Beijing Wonderful Investments.

三年前Fortress 和百仕通的公开上市就是资产泡沫吹到最大的迹象那些在Fortress上市时投资这家公司的人迄今已经赔了75%的钱在首发后的头两年里,其股票狂跌了95%至于百仕通,它的股票自上市以来已跌去了一半即使把股息也算上,普通投资者也已损失了20多亿美圆神州当局也被套患上够呛:约在同一时期,通过北京万德福投资有限公司,神州当局买下了百仕通10%的股分说它是WONDERFUL真是有点名不副实了

The notion of weak fuzzy similarity relations,a generalization of fuzzy similarity relations,is used to represent indiscernibility of elements.

为此提出用模糊相似关系和弱模糊相似关系的概念来代替等价关系,同时引入了弱模糊相似关系的相似度概念和相似类概念,定义了基于弱模糊相似关系的广义粗糙集及标准的广义粗糙集上下近似;研究了两对上下近似算子的性质,讨论了3种粗糙隶属函数的性质并验证了它们的性质。

In the buckling question under nonconservation force,a simply example( the dynamic stability question under the uniformly follower forces with small deformation % linear elastic, straight normal.) is considered.The variational equation of braid composite cylindrical shells subjectd to uniformly follower forces is deduced based on the variation principle of quasinatural frequency of elastic nonconservative system self-excited vibration.The calculated formulas of the flutter load and quasinatural frequency of shells are obtained. The program for calculating the flutter load is developed.The numerical example is given and some useful conclusions are obtained.

对非保守力作用下的屈曲问题,具体研究了圆柱壳在比较简单的情况,即小变形、线弹性、直法线假设下在随动力作用下的壳屈曲问题,由拟固有频率变分原理推出了圆柱壳受随从力作用的变分方程,得到了颤振载荷与壳弯曲的固有频率的计算公式,编制了相应的计算机程序,并给出了具体算例,得到了一些有益的结论。

This paper introduces eight methods of tlme-frequency analysis, such as Hilbert transform, Hilbert-Huang transform, sine curve fitting, Ricker wavelet matching, short time Fourier transform, wavelet transform, S transform and Cohen methods, This paper explains the merits and defects of those methods from the time resolution, frequency resolution and the adaptive ability of multi-frequency signals.

本文介绍了Hilbert变换、Hilbert—Huang变换、正弦曲线拟合、雷克子波匹配、短时傅立叶变换、小波变换、S变换以及Cohen娄这八种方法,并从时间分辨率、频率分辨率,以及对多频率成份信号适应能力等各方面阐述了各种方法的优缺点,对其中的一些方法结合了理论记录进行了试算,进一步阐述了这些方法的长处和不足之处。

This paper introduces eight methods of time-frequency analysis,such as Hilbert transform,Hilbert-Huang transform, sine curve fitting ,Ricker wavelet matching,short time Fourier transform,wavelet .

本文介绍了Hilbert变换、Hilbert-Huang变换、正弦曲线拟合、雷克子波匹配、短时傅立叶变换、小波变换、S变换以及Cohen类这八种方法,并从时间分辨率、频率分辨率,以及对多频率成份信号适应能力等各方面阐述了各种方法的优缺点,对其中的一些方法结合了理论记录进行了试算,进一步阐述了这些方法的长处和不足之处。

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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