Analysis on Rules of Investment Decision Based on Payback Period of Dynamic Investment

The index of payback period of dynamic investment is an improvement on index of payback period of static investment, which is the problem that the rules to evaluate the project are feasible or not. This paper proves that rules shall be apt when using payback period of dynamic investment to evaluate the project feasibility under the condition of keeping the dynamic evaluation index to evaluate the same scheme and the consistent feasibility.

Transforming the Evaluation of the Rule of Law in China

Over the past ten years, China has seen a number of practices exploring the evaluation of the rule of law. It is important that we sum up the practical experience of these evaluations, analyze the problems they encounter, determine their direction nationwide, and put forward constructive ideas. With the issuing of the Decision of the Central Committee of the CPC on Some Major Issues Concerning Comprehensively Deepening the Reform and the Decision of the Central Committee of the CPC on Promoting a Number of Major Issues of the Rule of Law, evaluation of the rule of law faces a transformation both in theory and in practice. The key points in this transformation are having the right orientation, innovative mechanisms and solutions to tricky issues of quantitative evaluation; summing up evaluation of experience; and elevating evaluation to the level of theory. A precondition for its effective evaluation is a scientific mechanism for evaluating the rule of law; in turn, the key to a scientific evaluation is solving the problems in quantitative evaluation of the rule of law; and the necessary requirements for evaluation practice are summing up evaluation experience and elevating it to the level of theory. The key to innovative mechanisms for evaluating the rule of law lies in implementation of the third party evaluation model and in quantitative evaluation that starts with particular programs.

Research status and prospect of wind-vehicle-bridge coupling vibration system

To promote and develop the theoretical basis and application of the wind-vehicle-bridge coupling vibration system,the corresponding research status and prospects are reviewed and discussed from five aspects,i.e.,the analytical framework,the aerodynamic interference,the evaluation criteria,the design loads of long-span bridge and the double-deck railcum-road bridge.The refining process of analysis system is reviewed from the aspects of simulation wind load,vehicle load and bridge structure,and the corresponding coupling relationship.For aerodynamic interference,the development process is summarized from the simulative precision of the elements(wind,vehicle and bridge),the load cases and the object of interference.For evaluation criteria,the corresponding development course is summarized from the certain evaluation method to uncertain one.For long-span bridge design load,the wind and vehicle loads are reviewed and summarized from current multinational codes and theoretical research.For double-deck rail-cum-road bridge,the mechanism of multi-element coupling relationship and corresponding aerodynamic interference are both reviewed.By comprehensive review and summary,the analytical framework is in the process from simplification to refinement.The simulation and consideration of the objects of structural interference gradually become complex.The corresponding simulation theory,wind tunnel scale,test equipment and technology are the key factors to limit its development.For systematic evaluation of vehicle and bridge,the structural and systemic security are the basis of the evaluation,and the auxiliary components and functional evaluation need to be paid more attention.The evaluation criterion will be developed from certain method to reliability assessment.For design load of long-span bridge,the vehicle load is gradually transferred from the simple application of the design load of small-medium span bridge into a complex model considering the load characteristics.For double-deck rail-cum-road bridge,the basic theory and experimental study on coupling mechanism and aerodynamic interference need to be developed.

Expert System Based on Data Mining and Neural Networks

On the basis of data mining and neural network, this paper proposes a general framework of the neural network expert system and discusses the key techniques in this kind of system. We apply these ideas on agricultural expert system to find some unknown useful knowledge and get some satisfactory results.