In this paper, a macroscopic model is applied to simulate dynamical features of traffic flow on a continuum urban network. This model is described as the two-dimensional Lighthill-Whitham-Richards model coupled with a reactive dynamic user-optimal route choice model. Numerical results visualize the ability of the model to predict some macroscopic characteristics of traffic flow on networks, i.e. the spatial distribution of flow density and travel cost of users, as well as to capture traffic congestion build-up and dissipation.

A prototype of miniature vapor compression heat pump system was introduced. On the basis of compressor, capillary, condenser and evaporator models, the steady-state model of air-to-water miniature heat pump system is developed with regard to energy and refrigerant inventory conservations among all these components. The results show that the relative error between prediction and experiment values is less than 5%, and the optimal match of condenser and evaporator lengths were obtained by simulation program.

Feedlot biomass ash (cattle manure ash-CMA) is a waste which comes from dried cattle manure combustion. In recent years, how to reuse the solid waste is becoming a hot issue. There is a large of CMA biomass ash in china every year, which not only occupies farmland and pollute environment but also impact the development of farming and animal husbandry. Therefore, it is necessary to study to reuse CMA biomass ash in concrete to replace concrete. In this paper, status of research of the CMA application in concrete at home and abroad is analyzed, the problems of the present research which exist in application of CMA biomass ash in concrete and how the particle size of CMA influence the performance of concrete when some cement is replaced by CMA is points out. It is necessary to carry out to study how particle size of CMA biomass ash influence on concrete performance.

Biomass ash (cattle manure ash, CMA) is a waste which comes from combustion cattle manure to gain heat and electric energy. Aim reducing the emission of carbon dioxide that comes from cement production in the period of realizing the Twelfth Five-Year Plan for National Economic and Social Development of China. emission of carbon dioxide of biomass (cattle manure) combustion, the chemical propriety of the biomass (cattle manure) ash and the CMAs present situation of application in concrete are studied in the paper. the result indicate that the biomass ash (CMA) replacing some cement in concrete is feasibility, the analysis will provide basic data for generalizing biomass ash (CMA) application in the concrete.

This paper aims at the problem which is lack of practical operability although there are many written instructions in collapse earthquake plan and rescue technology of existing concrete frame structure. Research status of earthquake prevention and disaster reduction of existing concrete frame structure is presented. the existing problems of rescue program and technology is analyzed when earthquake is happened in existing concrete frame structure, it is critical to improve the relevant technology standards and regulations and to implement prevention for to solve the problems, the main content of prevention collapse earthquake is pointed out. The result will give some guidelines to the research of collapse earthquake plan and rescue technology of existing concrete frame structure.