聚铁絮凝剂处理高浊度原水的研究

本文研究了无机高分子铁盐－聚铁及其和有机高分子絮凝剂ＰＡＭ复配使用处理高浊度原水的最佳实验条件、絮凝性能、效果和机理，为铁盐絮凝剂的选择和管式絮凝器的研制提供了理论依据。     

CYCLIC VISCOPLASTIC DESCRIPTION FOR THE MEAN STRAIN EFFECT

ＣＹＣＬＩＣＶＩＳＣＯＰＬＡＳＴＩＣＤＥＳＣＲＩＰＴＩＯＮＦＯＲＴＨＥＭＥＡＮＳＴＲＡＩＮＥＦＦＥＣＴＣＹＣＬＩＣＶＩＳＣＯＰＬＡＳＴＩＣＤＥＳＣＲＩＰＴＩＯＮＦＯＲＴＨＥＭＥＡＮＳＴＲＡＩＮＥＦＦＥＣＴ￥ＹａｎｇＸｉａｎｊｉｅ（ＳｏｕｔｈｗｅｓｔＪ...     

ITERATIVE COMPUTATION METHOD FOR NONLINEAR FORCED VIBRATION EQUATION ON HELICOPTER MAIN ROTOR LOAD

ＩＴＥＲＡＴＩＶＥＣＯＭＰＵＴＡＴＩＯＮＭＥＴＨＯＤＦＯＲＮＯＮＬＩＮＥＡＲＦＯＲＣＥＤＶＩＢＲＡＴＩＯＮＥＱＵＡＴＩＯＮＯＮＨＥＬＩＣＯＰＴＥＲＭＡＩＮＲＯＴＯＲＬＯＡＤＬｉｕＸｉａｎｇｊｉａｎ；ＳｈｅｎＸｉｎｋａｎｇ；ＸｕｅＺｈｅｎｇｚｈｏｎｇ（...     

民用直升机闪电间接效应适航验证方法研究

随着技术的进步,越来越多的现代高技术航空电子系统在直升机上得到应用。在提高系统灵敏度的同时,也带来了闪电间接效应防护问题。在分析闪电间接效应防护的适航要求的基础上,结合AC313型机适航验证结果,提出适航验证方法,对其它直升机闪电间接效应防护有一定的参考价值。     

屏蔽材料对木星轨道卫星内部介质充电效应的影响研究

在木星轨道的空间辐射环境中,占主导地位的粒子是能量大于1 MeV(甚至高于100 MeV)的高能电子,这可能会产生卫星内部介质充电效应.在卫星的防辐射设计中,通常需要一定厚度的材料来屏蔽这些电子,使得进入卫星内部的电子通量达到安全的水平.利用所建立的GEANT4-RIC(radiation induced conduc...     

Predicting near-wall turbulence with minimal flow units in compressible turbulent channel flows

Mach number effects on the near-wall turbulence in the absence of outer motions remain unclear so far. The present study extends the Minimal Flow Units (MFUs), a widely applied method to investigate near-wall turbulence free from the impact of large-scale motions in the outer region in incompressible channel flows, to compressible wall-bounded turbulence. The compressible near-wall turbulence in MFU proves accurate in replicating near-wall statistics, independent of Mach number and statistically equivalent to the universal signals extracted from the full-sized channel. It is further utilized as universal signals in the predictive models of compressible near-wall turbulence, which is capable of accurately predicting variances and joint probability density functions of velocity and temperature fluctuations.     

下一代空间激光骨干网络全光处理技术

构建以高速激光链路为传输主体的空间激光骨干网络，是保障空间数据高速传输、提升信息共享率与时效性、实现信息服务网络全球覆盖的重要技术手段。空间数据容量的快速增加要求网络节点处数据处理带宽与之相适应且具备一定扩展性和兼容性。由于空间激光骨干网络节点较少、数据快速传输的特点，围绕我国下一代空间激光骨干网络节点处高带宽、低延迟的数据处理需求，基于交叉相位调制XPM和四波混频FWM两种光学三阶非线性效应分析并讨论了骨干节点处高速激光链路的交换/组播、制式转换及中继/再生全光数据处理技术，为我国下一代空间信息网络建设及高速激光链路的全面应用提供支撑。     

Influence of lunar regolith compressibility on sampling performance of thick wall spiral drills

A 2 m class robotic drill was sent to the Moon and successfully collected and returned regolith samples in late 2020 by China. It was a typical thick wall spiral drill (TWSD) with a hollow auger containing a complex coring system to retain subsurface regolith samples. Before the robotic drill was launched, a series of laboratory tests were carried out to investigate and predict the possible drilling loads it may encounter in the lunar environment. This work presents how the sampling performance of the TWSD is affected by the regolith compressibility. Experiments and analysis during the drilling and sampling process in a simulated lunar regolith environment were conducted. The compressibility of a typical lunar regolith simulant (LRS) was measured through uni-directional compression tests to study the relationship between its inner regolith stress and bulk density. A theoretical model was established to elucidate the cutting discharge behavior by auger flights based on the aforementioned relationship. Experiments were conducted with the LRS, and the results show that the sampling performance is greatly affected by the flux of the drilled cuttings into the spiral flight channels. This work helped in scheduling reasonable drilling parameters to promote the sampling performance of the robotic drill in the Chinese Chang'E 5 mission.