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1.
Based on some basic principles of self-organization theory including dissipation structure and synergy,the author analyzes the condition,dynamic and evolving route of the self-organization evolution of the real estate industry,and builds synergetic evolution model,calculates out the order parameter of the real estate industry. The paper supplies new methods and tools for further research of real estate industry and contributes to reference of the government for its direction of macro-control.  相似文献   

2.
Zeng  JianBang  Li  LongJian  Liao  Quan  Cui  WenZhi  Chen  QingHua  Pan  LiangMing 《科学通报(英文版)》2009,54(24):4596-4603
A new lattice Boltzmann model based on SC model, is proposed to describe the liquid-vapor phase transitions. The new model is validated through the simulation of the one-component phase transition process. Compared with the simulation results of van der Waals gas and the Maxwell equal-area construction, the results of the new model have a better agreement with the analytical solutions than those of SC and Zhang models. Since the obtained temperature range and the maximum density ratio in this model are expanded, and the magnitude of maximum spurious current is only between those of SC and Zhang models, it is believed that this new model has better stability than SC and Zhang models. Consequently, the application scope of this new model is expanded compared with the existing phase transition models. According to the principle of the corresponding states in engineering thermodynamics, the simulations of ammonia and water phase transition process were implemented using this new model with different equations of state. Compared with the experimental data of ammonia and water, the results show that the Peng-Robinson is the best equation of state to describe the phase transition process of ammonia and water. Especially, the simulation results of ammonia with Peng-Robinson equation of state have an excellent agreement with its experimental data. Therefore these simulation results have a significant influence on the real engineering applications.  相似文献   

3.
This paper deals with the problem of dress-ornamenting culture and environmental art,whichconsists of three parts:A.Dress-ornamenting culture and environmental art of great significanceto China's textile industry today,B.The true essence of dress-ornamenting culture andenvironmental art in the course of production and reproduction of real life and C.A severe chal-lenge to China's textile industry by the new development of dress-ornamenting culture andenvironmental art.  相似文献   

4.
The classical least-square method was extended from the real number into the complex number domain, which is called the complex least-square method. The mathematical derivation and its applications show that the complex least-square method is different from one that the real number and the imaginary number are separately calculated with the classical least-square, by which the actual least-square estimation cannot be obtained in practice. Applications of this new method to an arbitrarily given series and to the precipitation in rainy season at 160 meteorological stations in China mainland show advantages of this method over other conventional statistical models.  相似文献   

5.
In this paper, a new model to analyze laminar forced convective enhanced heat transfer in latent functionally thermal fluid is developed. The main characteristics of the model are- i) a new formula of the specific heat at constant pressure is used; ii ) a real heat transfer process is considered; that is, heat transfer processes occur not only between working fluid and microcapsules, but also between the mixture and tube wall; iii) the new method, which combines the newly developed axisymmetrical dual reciprocity boundary element method (DRBEM) with finite difference method (FDM), is used to solve the control equations of this problem. The new model is validated by experimental data. Some new physical results on the variational characteristics of the specific heat at constant pressure with space and time during phase-change process, the time-marching history of the phase-change interfaces and so on are obtained. Several main physical factors that affect enhanced heat transfer in latent functionally thermal fluid are numerically analyzed. Some new understandings for the mechanism of enhanced heat transfer in the functionally fluid are obtained.  相似文献   

6.
Security experts have not formally defined the distinction between viruses and normal programs. The paper takes user's intension as the criteria for malice, gives a formal definition of viruses that aim at stealing or destroying files, and proposes an algorithm to detect virus correctly. Compared with traditional definitions, this new definition is easy to understand, covers more malwares, adapts development of virus technology, and defines virus on the spot. The paper has also analyzed more than 250 real viruses and finds that they are all in the domain of the new definition, this implies that the new definition has great practical significance.  相似文献   

7.
It is nontrivial to maintain such discovered frequent query patterns in real XML-DBMS because the transaction database of queries may allow frequent updates and such updates may not only invalidate some existing frequent query patterns but also generate some new frequent query patterns. In this paper, two incremental updating algorithms, FUXQMiner and FUFXQMiner, are proposed for efficient maintenance of discovered frequent query patterns and generation the new frequent query patterns when new XML queries are added into the database. Experimental results from our implementation show that the proposed algorithms have good performance.  相似文献   

8.
《中国工程科学》2012,(4):2-6,11
The non-coupled charge explosion and geo-mechanical dynamics problem in real air condition is studied in this paper. It analyzes and calculates the problem by using the real air state equations. Through researching on the non-coupled charge rock bench blasting with big clearance of air, its result indicates that the borehole wall reflection overpressure is far higher than strength of rock, but much lower than detonation front pressure of the charge. So non-coupled charge explosion blasting engineering is very successful. Furthermore, it introduces the method of shaft forming by blasting once and the new tube room technology. And the non-coupled charge explosion is used successfully in the method of shaft forming by blasting once. As it drills and blasts in the top and removes the broken rock from the bottom tunnel, it increases the construction efficiency significantly. This paper has important reference on the improvement of the large-span underground engineering construction.  相似文献   

9.
This is a brief report of a new occurrence of eocrinoids from the Early Cambrian Wulongqing Formation in Yunnan, China. The eocrinoids from the Guanshan fauna are among the earliest known eocrinoids. Different from many other Early and Middle Cambrian eocrinoids, the Guanshan eocrinoids are char-acterized by the absence of sutural pores and epispires, the long and spiral brachioles, the extremely long stalk, and the ratio of the length of the stalk versus that of the calyx. The discovery of the eocri-noids from the Guanshan fauna not only provides new information to the investigation of the early evolution of this animal group, but also shed new light on the occurrence and migration of early eocrinoids.  相似文献   

10.
This paper presents a new inductive learning algorithm, HGR (Version 2.0), based on the newly-developed extension matrix theory The basic idea is to partition the positive examples of a specific class in a given example set into consistent groups, and each group corresponds to a consistent rule which covers all the examples in this group and none of the negative examples. Then a performance comparison of the HGR algorithm with other inductive algorithms, such as C4.5,OC1, HCV and SVM, is given in the paper. The authors not only selected 15 databases from the famous UCI machine learning repository, but also considered a real world problem. Experimental results show that their method achieves higher accuracy and fewer rules as compared with other algorithms.  相似文献   

11.
通过分析商标权的期权性质,考虑商标权具有多种实物期权的特点,从商标投产后,商标权所有人在商标投资项目中拥有的不同选择权的角度出发,应用二项式定价模型评估商标权价值,并结合案例说明商标权所包含的期权价值,以期为商标权价值评估提供一个新的视角.  相似文献   

12.
This paper develops the CIR model. In this model, labor is introduced in the production function and leisure in the direct utility function. We examine how the trade-off between labor and leisure would affect asset prices and derive a familiar principal partial differential equation which asset prices must satisfy. The solution of this equation gives the equilibrium price of any asset in terms of the underlying real variables in economy. Yang Yunhong: born in 1971, Ph. D  相似文献   

13.
资产重组中出现的国有资产流失现象给国民经济带来了巨大的损失。要防止这一问题的发生 ,就需要对造成国有资产流失的原因进行全面的分析。本文从国有资产产权主体缺位、政府干预严重、低估国有资产价值、银行信贷资产流失以及企业盲目并购等五个方面进行了详细的阐述 ,并有针对性地提出了若干建议  相似文献   

14.
基金市场的活跃程度直接影响基金净值的变动,市场内部的影响因素具有较强的非线性特征,神经网络模型强大的非线性处理功能能够更为精准地预测基金净值的走势.本文采用BP神经网络和RBF神经网络对华夏成长基金进行实证分析,比较2种方法的预测精度.实证结果表明:RBF神经网络的仿真结果与真实值匹配程度较好,具有更高的预测精度.  相似文献   

15.
本文阐述了以下二阶拟线性微分方程的解的振荡性,有界性和单调性的一些新结果。(p(t)(y’(t))α)’=q(t)yβ(t) r(t),t≥tο其中,tο是非负实数,当t≥tο时,p(t)是连续的正实函数,r(t)是连续的实函数,q(t)是非负的连续的实函数且q(t)≠0,α和β都是正奇整数的商数。  相似文献   

16.
本文以统计热力学中的微扰理论为基础,建立一种推算实际气体p、v、T的新方法.用这种方法对22种实际气体在靠近饱和线的过热蒸气区进行了压力推算.计算结果表明,对普通气体、氟里昂类气体、烷烃类气体以及氨、水等强极性气体都可适应,平均相对偏差小于0.5%,比通用型Lee-Kesler方程有显著提高.特别对象氨、水这类强极性气体,本文方法具有明显的优越性.  相似文献   

17.
本文阐述房地产新政出台的背景,分析房地产市场与资本市场对新政的反应以及对房地产市场未来的影响,提出开发商应对房地产新政的策略。  相似文献   

18.
银行不良资产问题的解决不仅直接关系到银行的发展,而且关系到国有企业的改革乃至金融体系的稳定和整个社会经济的健康成长.在我国金融市场蓬勃发展的前提下,研究适合我国金融环境中应用的不良资产处置方法对我国的不良资产处置工作具有积极的指导意义.  相似文献   

19.
我国现行的房地产税制存在着很大的问题,已经与我国的经济运行状况很不适应了。文章在对我国现行房地产税制进行分析的基础上,提出整理与归并现有房地产税制,以建立新的房地产税制的设想。同时,运用定量的方法测算了新的房地产税的税率,从另一个角度检验了该税率的合理性。  相似文献   

20.
在Kim和Kunitomo提出的新型利率模型下,研究了股票价格服从跳-扩散过程的期权定价问题,同时考虑了红利的支付。假设参数都是关于时间的函数,利用鞅方法得到了欧式看涨期权与看跌期权价格的解析表达式,从而进一步推广了B-S模型的结论。  相似文献   

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