Effect of plunger number on hydraulic transformer's flow pulsation rate

In order to supply theoretical guidance to hydraulic transformer's design and application,the effect of the number of plungers in hydraulic transformer on its flow characteristic is analyzed,theoretical analysis and simulation are done on hydraulic transformer's flow characteristic when the number of plungers is different.Based on the working principle of swash plate piston hydraulic components,mathematical models of instantaneous flow and flow pulsation rate are built,and simulation study is done with MATLAB.As a result,the effect is found,and some conclusions worth referring to are obtained.

Distributed Energy Saving Mechanism Based on CoMP in LTE-A System

To reduce the energy consumption of the LTE-A system,a distributed energy-saving mechanism based on Co MP(Co MPDESM) is proposed to solve the inadequate coverage problem under the dormant cells.First,the network is divided into clusters based on the equivalent cell principle.Then,we transfer global optimization into a group of subproblems.Second,a joint processing-based cooperative cell selection model is constructed to determine cooperative cells and dormant cells.Third,the compensative cells with a determined threshold are selected to control users' access.Finally,a simulation is implemented in Matlab.Results show that the energy-saving rate can reach 36.4% and that the mechanism meets the network coverage requirement.Thus,joint processing can be effectively applied in an energy saving mechanism and used to improve the network performance of edge users without increasing transmission power.

基于MATLAB的桡动脉谐波分析显示装置的设计

人体血液自心脏向外周血管流入时,会对压力波产生一定的影响,其对心血管系统性能有着较高的敏感性,基于这一原理临床多应用桡动脉谐波变化情况对心血管疾病进行早期诊断。随着现代医疗设备的更新与技术进步,动脉谐波传输及分析系统在临床得以应用,但由于系统显示器多为固定角度,难以根据人群调节。研究引入了MATLAB谐波原理,介绍了MATLAB谐波的构建及设计,并设计了一种基于MATLAB的桡动脉谐波分析显示装置,实践证实其具有角度可调节的优势,便于不同人群应用,具有较高社会价值与经济价值。