Applied Mechanics and Materials Vols. 84-85

Abstract: Differential Evolution (DE), a vector population based stochastic optimization method has been introduced to the public in 1995. During the last 25 years research on and with DE has reached an impressive state, yet there are still many open questions, In this paper ,An improved differential evolution (IDE) algorithm was presented for power system Dynamic economic dispatch(IDED), Dynamic economic dispatch (DED), an extension of the economic dispatch problem, is a method of scheduling the online generators with a predicted load demand over acertain period of time taking into account the various constraints imposed on the system operation. The results indicate that IDE algorithm outperforms GA ,PSO and DE algorithms in solving DED problems.

Abstract: This paper described the theory, source and effect of the vibration of the block making machine. The paper analyzed the situation of beneficial vibration and harmful vibration. The author improved the traditional vibration device of block making machine. The new type of block making machine realized harmless vibration and high efficiency.

Abstract: In order to understand the distribution of hospitalization costs and development trends in Steel worker hospital, we used the proportion, the dynamic series and other indicators to analyze the Proportion and the developments of all medical costs spent by inpatients in a hospital during 2002 to 2009. As a result, expenditure on medicine obtained the largest proportion of the hospitalization costs. In the observation period, the proportion of medicine and laboratory tests kept growing, particularly of the medicine costs. While the blood transfusion costs decreased. The results indicated that we should focus on medicine costs firstly and then on laboratory tests fees to control the growth of hospitalization costs of steel workers.

Abstract: In order to find out the steel industre workers’ health conditions and the pattern of the change in this industre, we used the abridged life table to work out the life expectancy. We got the following results: the life expectancy for the steel industre workers in 2000 was 74.02 years, for men was 72.44 years and for women was 75.72 years. The results showed that the level of the steel industre workers’ health was significantly improved.

Abstract: This paper introduce a substation integrated automation control system of 220kV structures, characteristics and functions of the system, which discuss and analysis the engineering problems in practical application and points out the system still must perfect place, and put forward to some suggestions of the system construction.

Abstract: The paper analyzed major factors that influence the stability of open-pit slope and established the GM (1, N) model based on the program of Xingshan strip mine, which provided an effective method for evaluating the slope stability.

Abstract: This paper analyzes the operation power of screw air compressor and the formula of power of isentropic adiabatic compression is given.Then the influence of leakage with the volume flow is described and the volumetric efficiency is calculated. Based on power and volume flow, the energy consumption model of screw air compressor is established and simulated with MATLAB.Simulation results prove that the optimal value of upper limit exists and the gas consumption affects the value.

Abstract: This template takes the data of energy consumption indicators in Jiangsu Province from 1996 to 2009 as the object of study, evaluated its energy efficiency and analyzed the influencing factors using DEA-Tobit model. The conclusion believed that the energy efficiency has a downward trend in Jiangsu Province after 2000. The energy efficiency has positive correlation with population, fixed assets investment and energy consumption.

Abstract: An example of a central air-conditioning project of a rebuilt department store is described in this paper. The design of air system, water system, layout and operations for the air conditioning system is presented in this paper. The system is different form ordinary ones because the floor height is lower; so many special considerations must be taken during the design. In addition, the low cost and easy maintenance place an important role in the design. The operational result of the design is promising and it can be referenced by other designers.

Abstract: This document takes the 30 completely state-owned manufacturing industry professions in Shandong Province as the object of study, has surveyed the total factor energy efficiency, the technology advancement index and the technology efficiency index of the manufacturing industry with the Malmquist productivity method. The conclusion believed that the value of the manufacturing total factor productivity in Shandong Province is relatively stable in recent years. Light industry or heavy chemical industry which is labor-intensive has lower total factor energy efficiency in various industries.