A Caculation Method of Portfolio Investment under the Risk Mininiz

According to the security investment theory of Markowitz,this paper presents aCaculation method of portfolio investment under the risk minimization,and some mathematic expres-sions of the efficient frontier for portfolio investment are conducted.Based on these,the efficientfrontier is proved as a parabola,and a practical caculation process is given.     

An Optimal Bicriterion Grey Input-output Model in Energy System

This paper combines the energy input-output model with an optimal bicriterion model, and uses the grey system theory to set up an optimal bicriterion grey input-output(OBGIO)model. This paper also put forward some amendments to bicriterion algorithm. Finally, the OBGIO model is used to optimize the energy economic structure of a city, and analyze its potentiality on the structural energy saving.     

A Dynamic Model for Generation Expansion Planning and Algorithm

This paper discusses the problem of long-range generation expansion planning. A dynamic model for long-range expansion planning is set up and an algorithm-a two-step programming is presented, which is used here in a case.     

A pricing method of depletable nonrecyclable resources

A pricing method of depletable nonrecyclable resources has been advanced in this paper. Prices of resources, made with the method, can meet the needs of depletable nonrecycclable resources optimum allocation.     

The Probabilistic Production Simulation of Interconnected Generating Systems with Independent Loads

A new method, based on the direct method of weighting multiple normal distri butions, is proposed to evaluate the production costs of two interconnected systems. It can be applied in calculation of expected power generation, reliability indexes and production coats of two interconnected systems without their load correlation. The effect of the linking line on the interconnection is also studied.     

Analyses of Chongqing''s Complex Energy Consumption

This paper and studied the energy economy in the light of the system theory and method. An energy input-output table has been compiled and an energy input-output model has been set up to analyse in a broad sense the energy consumption in Chongqing with a new generalized method.     

A New Method for Determining the Typical Daily Load Curves

After analyzing the ten-year load data of a real power system, a novel method, with the help of Edgeworth progression has been developed to determine the representative daily load curve, which is useful in power generation planning. The method is successful to avoid the random and subjective factors in the exiting method of curve-making.     

DIRECT METHOD OF PROBABILISTIC PRODUCTION SIMULATION BASED ON MIXTURES OF NORMAL DISTRIBUTIONS

This paper describes a new probabilistic production simulation method based on mixtures of normal distributions. This method does not require to modify the original load,and the relevant formulae are derived directly from the mixture of normal distributions of load and the mixture of normal distributions of system power. Numerical results indicate that this method is accurate and rapid in comparison with the conventional and the cumulant methods.     

A COMPARATIVE STUDY ON QUANTITATIVE EVALUATION METHODS FOR DIRECT INVESTMENT ENVIRONMENT

ABSTRACT This paper discusses the most representative and practical quantitative evaluation methods of direct investment environment at home and abroad, analyses them deeply and comprehensively in the form of comparative study, and points out some further studying perspectives of the quantitative methods of direct investment environment.     

Two Optimization Methods for Portfolio Investment Decision

On the basis of introducing some fundamental theories and computational methods of portfolio investment, this paper derives a decision model for searching optimal portfolio with the utility function. Then,after comparing the new model with the conditional extreme optimization model,which has been usually considered by people,the result shows the new model would be more efficient under certain conditions.