矿难救险生命球的仿真设计

综合考虑矿难救险生命球在瓦斯煤尘爆炸时抗冲击波的能力、透水事故时抗水压的能力以及在矿井下的寿命等性能要求的基础上,基于MSC.Patran软件和NX Nastran软件对生命球进行了动态仿真分析,并对生命球的材质和壁厚进行优化设计,提高了生命球系统的整体性能,充分验证了该矿难救险设施的可行性。福建省重点项目(2006Y0027

Modeling based on UG Gleason spiral bevel gear

目前国内的齿轮加工专用机床无法加工一些尺寸超过其技术规格的齿轮副,而运用大型的数控加工中心加工弧齿锥齿轮副,齿轮副尺寸不再成为其制约因素。利用UG软件提供的UG/OPEN GRIP二次开发功能,编制相应的锥齿轮成形软件,根据设计图纸提供的格里森弧齿锥齿轮副的基本尺寸和参数,首先建立铣刀盘和弧齿锥齿轮大轮胚体的三维模型,然后结合格里森弧齿锥齿轮机床调整参数,在UG环境下模拟格里森机床调整过程,通过布尔运算得到成形法加工的大轮。之后采用变异的铣刀盘成形加工得到的变异大轮展成小轮毛胚实体,最终得到小轮齿面。此方法基于传统的格里森弧齿锥齿轮加工方法,又有不同之处,是格里森弧齿锥齿轮建模和加工的一种实用新方法。At present the domestic gear processing machine can not machining the gears that exceed the size of the technical specifications, in order to solve this conflict, this large-scale use of the NC processing center of spiral bevel gear, the size of the gear is no longer a constraint. With the UG/OPEN GRIP, we design bevel gear forming software to create the big round of three-dimensional model of the embryo, and complete simulation under UG, then we get the big gear by boolean operation. And a small round hair embryo is born by a variation of facer, finally, we get the tooth surface of the gear. This method is based on the traditional Gleason spiral bevel gear processing methods, also different, which suggest a practical way of a spiral bevel gear modeling and processing by Gleason.福建省重点项目(2006Y0027

Cigarette quality on-line detection device of cigarette making machine

本实用新型公开一种卷接机组中的烟支质量在线检测装置。包括电气和机械两大部分,电气部分以显示和逻辑控制为核心,二者之间通过串行屏蔽通信电缆连接;还包括信号采集系统,信号逻辑处理控制部分;逻辑控制部分接收信号采集系统部分信号;所述信号逻辑处理控制部分由信号逻辑处理控制器构成,接收信号采集系统信号,输出接逻辑控制及剔除系统;采集系统由空头检测单元、缺嘴监测单元及传感器构成;剔除系统为包括剔除鼓轮部分和传感器安装部分的机械部分。它将烟支端部空松及缺少过滤嘴的烟剔除,从而全面提升了成品烟烟支质量,降低原有机组的消耗,减少了不合格烟流入市场

肥 水

肥水是我国劳动人民在长期生产活动中发现的一种含有相当数量硝态氮的地下水。以往我国北方地区有些农村曾自发地进行过零星的利用，有的灌溉农作物增了产，有的利用不合理反而减了产。从1966年起，我们从总结农民经验入手进行了广泛的调查研究和规划利用。通过对陕、豫、鲁、冀、鄂、辽、等八个省有关地区的调查研究，揭示了地下肥水增产的实质及水质特点，阐明了地下肥水的成因和分布规律，介绍了地下肥水利用及增产效果。提出了合理利用的技术措施。肥水是一种新的天然氮素肥源，对我国北方一些地区粮棉增产起了显著的作用。肥水灌溉一般可增产20—50％，有的甚至高达一倍以上。仅陕西省内，已利用达20万亩以上。肥水的开发利用技术已在陕西、河南、山东、山西、安徽及东北地区普通推广应用

地下肥水的开发利用

肥水是我国劳动人民在长期生产活动中发现的一种含有相当数量硝态氮的地下水，以往我国北方地区有些农村曾自发地进行过零星的利用，有的地方灌溉农作物增了产，有的利用不合理反而减了产。从1966年起，我们从总结农民经验入手，进行了广泛的调查研究和规划利用。通过对陕、豫、鲁、冀、鄂、辽、吉等八个省有关地区的调查研究，揭示了地下肥水增产的实质及水质特点，阐明了地下肥水的成因和分布规律，介绍了地下肥水的利用及增产效果，提出了合理利用的技术措施。肥水是一种新的天然氮素肥源，对我国北方，一些地区粮棉增产起了显著的作用。肥水灌溉一般可增产20-50%；有的甚至高达一倍以上。仅陕西省内，已利用达20万亩以上。编写的《肥水》一书己由科学出版社1973年出版，肥水的开发利用技术已在陕西、河南、山东、山西、安徽及东北地区普遍推广应用

Enhancing Mechanical Performance and Intelligent Response of Chitosan/mah PEGmah-N-Vinylpyrrolide Double Network Hydrogel

先以壳聚糖(CS)用戊二醛(gA)交联为刚性网络,后将聚乙二醇马来酸酐双酯(MAH PEgMAH)与n-乙烯基吡咯烷酮(VP)的共聚物交联成柔性网络,合成了一种高强度且具有P H值、电场敏感性的智能型双网络水凝胶。利用红外光谱、扫描电镜表征了凝胶的化学结构和内部形态;X射线衍射研究了凝胶的结晶性能;研究了凝胶的力学性能及其影响因素,探讨了凝胶的P H值、电场敏感性能。研究结果表明,当CS含量为20%,gA用量为0.2 g gA/g CS,PEg相对分子质量为1000,bIS用量为0.5%时,所制备凝胶的压缩强度可达9.3 MPA。随着PEg相对分子质量的增加,凝胶的P H值敏感性增强;随CS交联度的增加,凝胶的最大弯曲角和电场敏感性先增加后降低。A kind of high strength intelligent double network(DN) hydrogel was synthesized by two-step cross linked method.Firstly chitosan(CS) was cross linked with glutaraldehyde(GA),secondly polyethylene glycol and maleic anhydride esterified products(mah PEGmah) and N- vinylpyrrolidone(VP) copolymers were cross linked with N,N'-methylene double acrylamide(BIS).The DN hydrogel has good p H and electric field sensitivity.The structure of resultant hydrogel was characterized by Fourier transform infrared(FT-IR) spectroscopy,scanning electron microscopy(SEM),crystallization properties of composite hydrogels were investigated by X-ray diffraction(XRD).It's found that when the CS content is 20%,the GA used content is 0.2 g GA/g CS,the molecular weight of PEG is 1000,and the BIS used content is 0.5%,the hydrogel strength of the compression rises up to 9.3 MPa.With the molecular weight of PEG increasing,the p H stim-response sensitivity of hydrogel is improved.With the degree of crosslinking increasing,the maximum bending angle of the gel and the electric field sensitivity of the hydrogel are decreased

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies