城市土地等价线图研究——以呼和浩特市为例

依据城市土地价格体系和地价空间分异规律,针对目前常用地价专题地图存在的问题,提出城市土地等价线图,介绍了城市土地等价线图绘制的一般方法.在呼和浩特城市土地价格调查工作的基础上,绘制了商业、住宅和工业用地等价图,取得了良好的效果.最后,就城市土地等价线图绘制中应注意的问题进行了讨论.

地表移动与变形的等价转换线积分计算

地表移动计算的概率积分计算方法基于地表移动计算中的迭加原理,由于其计算的简便,已得到普遍应用。而对于倾斜煤层的计算,虽有精确计算的各方面讨论,由于计算的繁锁和复杂,都未能在实际计算中得到广泛应用。本文基于地表移动计算的另一基本原理——等价原理,将倾斜工作面的下沉计算转化为水平工作面的下沉计算,从而解决了长期以来倾斜面下沉计算的简化误差问题。 1 线积分计算方法由数学分析可知,当区域D是一个单连通域,且函数P(X,Y),Q(X,Y)

风险投资决策行为的理论研究与税收政策分析

本文在投资主体理性和市场竞争充分的假设下 ,得出了风险资本市场的R -v曲线 ,在此基础之上 ,建立了风险投资主体的效用选择理论 ,并运用建立的理论对一种新型税种———风险保险税收的政策效应进行了分析 ,希望对我国风险投资业的发展有所帮助。

武汉空间房价影响因素研究——基于Kriging模型

基于Kriging method构建武汉房价的等价线图、表面模型以及矢量模型。通过分析武汉房价数值变化、武汉房价等价线极值闭环、等价线分布趋势以及等价线分布凸变,总结了关于武汉房价等价线疏密、武汉房价递变速率、武汉房价等价线极值闭环、武汉房价等价线形状、武汉房价地域分异以及房价等价线分布凸变的规律并分析了其各自产生的原因。

Methodology Approach Using Harmonic Synthesis as Simulation Method for Investigation of Power Network with Non-Linear Loads

The paper deals with analysis and synthesis of non-harmonic and non-linear sources and appliances, and their interaction with harmonic power supply network. Basic idea is based on knowledge of harmonic spectrum of the sources and/or appliances, respectively. Obviously, one need to know voltage harmonic components of voltage sources （renewable with inverters,...）, and current harmonic components generated by non-linear appliances （rectifiers,...）. Method of investigation lies on decomposition of real electric circuit into n-harmonic separated equivalent schemes for each harmonic component. Then transient analysis will be done for each scheme separately using ＂impedance harmonic matrices＂. The important fact is that each equivalent scheme is now linearized and therefore easily calculated. Finally, the effects of each investigated schemes arc summed into resulting quantities of real non-linear electric circuit.

Research on Route Planning Method Based on Active-Attack Strategy

Aimed at modern high-density,high overlapped and powerful antipersonnel stealthy penetration environment,route planning techniques on active-attack strategy were thoroughly and further studied,in order to get good probability of survival and perfect efficiency of task accomplishment.It provides a new thought for and a new solution to the application of route planning in new era.

GL（n, R）-Equivalence of a Pair of Curves in Terms of Invariants

In this paper, the generator set of R 〈 x1,x2 〉G is obtained in according to the group G = Gl（n,R）. The conditions of G = Gl（n, R） -equivalence of a pair of curves are found in terms of G = Gl（n, R）-invariants. And the independence of GL（n, R） -invariants is shown.

Suboptimal reliable guaranteed cost control for continuous-time systems with multi-criterion constraints

The suboptimal reliable guaranteed cost control （RGCC） with multi-criterion constraints is investigated for a class of uncertain continuous-time systems with sensor faults. A fauk model in sensors, which considers outage or partial degradation of sensors, is adopted. The influence of the disturbance on the quadratic stability of the closed-loop systems is analyzed. The reliable state-feedback controller is developed by a linear matrix inequalities （LMIs） approach, to minimize the upper bound of a quadratic cost fimction under the conditions that all the closed-loop poles be placed in a specified disk, and that the prescribed level of H∞ disturbance attenuation and the upper bound constraints of control inputs＇ magnitudes be guaranteed. Thus, with the above muki-criterion constraints, the resulting closed-loop system can provide satisfactory stability, transient property, a disturbance rejection level and minimized quadratic cost performance despite possible sensor faults.

An equivalent magnetic dipoles model for quantitative damage recognition of broken wire

By simplifying saturatedly magnetized wire-rope to magnetic dipoles of the same magnetic field strength, an equivalent magnetic dipoles model is developed and the measuring principle for recognising damage of broken wire was presented. The relevant calculation formulas were also deduced. A composite solution method about nonlinear optimization was given. An example was given to illustrate the use of the equivalent magnetic dipoles method for quantitative damage recognition, and demonstrates that the result of this method is consistent with the real situation, so the method is valid and practical. wire-rope, damage of broken wires, quantitative recognition, equivalent magnetic dipoles, simulate

Study of Adsorption Isotherm Curves of Amino Acids on the Kaolinite

This paper studies the adsorption isotherm curves of four amino acids (glycine, aspartic acid, glutamic acid and lysine) and the effects of existences of different concentrations of Cu(II) on them. Both the adsorption isotherm of the amino acids on the kaolinite and that when the copper ion Cu (II) exists belong to the Langmuir type. The slopes of these adsorption isotherm increase with the increasing concentrations of Cu(II) added. It can be explained in terms of formation of the type(I) ternary surface complexes in these systems. The regular pattern of the effects of copper ion Cu(II) on the adsorption isotherm of amino acids on the kaolinite is identical with that of its effects on the exchange and adsorption percentage E (%)-pH on the kaolinite in the same system.

确定原油价格机制的演变分析

引言原油价格是如何确定的?目前又怎样了? 为了答复这些问题,本文试图从1928年组成国际石油卡特尔起至石油输出国组织于1979年6月作出最新决定为止,对石油价格的演变进行一次系统的分析。尽管本文只叙事实不加评论,可以料想读者能够理解石油价格问题和产油国与石油公司之间力量对比的演变。石油定价的演变经历了三个重要时期:第一个时期由各石油公司单方面定价;

AN EQUIVALENCY CONDITION OF NONSINGULARITY IN NONLINEAR SEMIDEFINITE PROGRAMMING

In this paper,an equivalency condition of nonsingularity in nonlinear semidefinite programming,which can be viewed as a generalization of the equivalency condition of nonsingularity for linearsemidefinite programming,is established under certain conditions of convexity.

NEW DELAY-DEPENDENT STABILITY CRITERIA AND ROBUST CONTROL OF NONLINEAR TIME-DELAY SYSTEMS

This paper investigates the stability analysis and H_∞ control for a class of nonlinear timedelay systems,and proposes a number of new results.Firstly,an equivalent form is given for this class of systems by means of coordinate transformation and orthogonal decomposition of vector fields.Then,based on the equivalent form,some delay-dependent results are derived for the stability analysis of the systems by constructing a novel Lyapunov functional.Thirdly,the authors use the equivalent form and the obtained stability results to investigate the H_∞ control problem for a class of nonhnear time-delay control systems,and present a control design procedure.Finally,an illustrative example is given to show the effectiveness of the results obtained in this paper.It is shown that the main results of this paper are easier to check than some existing ones,and have less conservatism.

6-CANONICAL MAPS OFNONSINGULAR MINIMAL 3-FOLDS

The aim of this paper is to study 6-canonical system of a nonsingular minimal 3-fold X. If|2Kx|is not composed of pencils, it is shown that is birational with possible exceptionsfor:

On Equivalence of Two Realizations for a Nonlinear Lie Algebra

Recently,there are two independent approaches related to a class of nonlinear Lie algebras of three generators;and the realizations of these generators are achieved respectively in Schwinger-boson and position representation.However,by use of the representation transformation between these two representations,the equivalence of the two realizations is therefore proved.

On the Generalized Heisenberg Supermagnetic Model

In this paper, we construct the generalized Heisenberg supermagnetic models with two different constraints and investigate the integrability of the super integrable systems. By virtue of the gauge transformation, their corresponding gauge equivalent counterparts are derived, i.e., the super and fermionic mixed derivative nonlinear Schr?dinger equations, respectively.

Comparisons of Metrics on Teichmller Space

For a Riemann surface X of conformally finite type （g, n）, let dT, dL and dpi （i = 1, 2） be the Teichmuller metric, the length spectrum metric and Thurston＇s pseudometrics on the Teichmutler space T（X）, respectively. The authors get a description of the Teichmiiller distance in terms of the Jenkins-Strebel differential lengths of simple closed curves. Using this result, by relatively short arguments, some comparisons between dT and dL, dpi （i = 1, 2） on Tε（X） and T（X） are obtained, respectively. These comparisons improve a corresponding result of Li a little. As applications, the authors first get an alternative proof of the topological equivalence of dT to any one of dL, dp1 and dp2 on T（X）. Second, a new proof of the completeness of the length spectrum metric from the viewpoint of Finsler geometry is given. Third, a simple proof of the following result of Liu-Papadopoulos is given： a sequence goes to infinity in T（X） with respect to dT if and only if it goes to infinity with respect to dL （as well as dpi （i = 1, 2））.

SOME REMARKS ON THE NULL CONDITION FOR NONLINEAR ELASTODYNAMIC SYSTEM

The author derives the same null condition as in [1] for the nonlinear elastodynamic system in a simpler way and proves the equivalence of the null conditions introduced in [1] and [7] respectively.