Because of the shape of the warpage deviation caused serious influence quality of the product. And injection molding process is a highly nonlinear and strong coupling multi-parameter effects of the process, various parameters on product quality as well as the influence degree. So for the plastic parts, analyze and warpage of the injection molding process
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The increasingly development of technological drives the development of aerospace technology, shipbuilding industry, automobile industry and highly sophisticated device. All these are taking higher manufacturing requirements to the machine tools. With great carrying performance, low frictional resistance, long service life, high aseismic behavior, high precision and well stability, hydrostatic support system has became the core
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Ground water is an indispensability natural resource in our lives. With the development of modern industrial and agricultural, the rational development and effective utilization to groundwater resources is gradually becoming the focus in academia.We mainly use the numerical simulation method to take quantitative research. Based on discrete idea, the pending research aquifer will be divided
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The microfluidic chip can integrate many functions of analysis Lab, which has favorable application prospect and it has become one of focuses of MEMS. Fluid transfer and mixing in microchannels as two important operations, will directly affect the performance of microfluidic chips. In this paper, on the basis of analyzing internal and foreign situation of
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Micro-chip electrophoresis technology, the forefront of today’s technological development, have been used in clinical testing, new drug screening fields. Not only the biological field, but also other areas including food and commodity inspection, environmental monitoring, forensic science, military science and aerospace science begin to use micro-chip technology.It must be necessary tointroduce the turn to improve
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The research presented that heat flux has reached to 100W/cm2, and the methods of chip cooling commonly used can’t meet the need of cooling chips with ever increasing heat flux at present, to find a high-efficient and low-cost cooling media, and a novel cooling method with high efficiency has been a hot spot in research.In
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This thesis is dedicated to the research of impulse generation mechanisms of laser and material interaction.First the impulse generation process of nanosecond laser ablation of energetic polymer is modeled; Laser material interaction theory and modeling method are expatiated. The thermodynamic processes versus time of dense phase and plasma under laser illumination are analyzed. The result
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In this thesis, with experimental measurement and numerical simulation, the irradiation effects of DF laser upon 45#steel is studied in different gas flow.Firstly, experimental measurement is employed to study the effects of the DF high-power laser irradiation on 45#steel in different gas flow; by analyzing the surface picture and measuring the temperature history. The experimental
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It is a common phenomenon that gas-liquid two-phase flow around bluff body in industrial production. Researching vortex shedding in gas-liquid two-phase flow has important significance in providing a theoretical guarantee for the designation of industrial anti-vibration and accurately measuring the flow parameters in gas-liquid two-phase flow. In this paper, the characteristics of vortex shedding for
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Fiber Master-Oscillator Power-Amplifier (MOPA) system can further improve the output features of fiber lasers. So it has great academic value and potential for application in industry, space range finding, military and so on.This thesis gives a theoretical and experimental research on Yb-doped double-clad fiber (YDDCF) MOPA system. The main points include:1. The characteristics, application prospect
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