Research on the System of 5-Axis CNC Wire Bending Machine Based on PMAC

在五金制造行业中，金属线材成形的传统加工一般是靠人力操作专门的模具，这种生产方式劳动强度大、自动化程度低、效率低而且工件加工精度不高。另外，如果产品的品种较多，这种方式要经常更换模具，难以满足即时制造的要求。数控弯丝机正是为了满足多品种高精度的加工，利用数控技术和可换位模具，高效高质量地实现线材制品的自动加工装备。 本文的研究工作主要包含以下三方面的内容： 第一、在机械方面，根据金属线材的成形特点，给出了整台机器的机械结构模块和运动过程，并进行了线材成形施力点分析；针对施力点的变化确定了机床轴数和联动轴数，并确定了每个轴所需要的电机及相应的减速机型号。 第二、在系统软件方面，首先在下位机...In the metal manufacturing industry， the traditional wire forming is operated manually with special die. This mode of production is labor-intensive， inefficient and inaccurate. In addition， frequency of varying the molds for different types of workpieces makes this method become graduatelly difficult to meet the requirement of the real-time manufacturing. In this paper， the research is to adapt va...学位：工学硕士院系专业：物理与机电工程学院机电工程系_机械制造及其自动化学号：1992006115183

The Probe of Tax Service in the Information Year

科学发展观要求转变政府职能，税务部门是政府的组成部分，理应响应科学发展观的要求，将管控型征管向服务型转变，这种转变离不开强有力的税收信息化系统的支持。税收信息系统是我国政府最大也是最先进的信息化系统之一。当前我国税收信息系统已经完成几十个分系统的省局和总局的数据大集中，开始由事物处理阶段发展到信息系统的高级阶段，这些为纳税服务的深入发展提供了有利的前提。回顾近三十年税收模式转变历史，我们发现，无论是“各税统管”、“三分离”、“两分离”还是“管事”，都强调控管，这是历史演变的必然，也是信息化条件逐渐具备的必然。近期，国家税务总局在多种渠道中，阐述了纳税服务重要性，之后总局成立了“纳税服务司”，给...In order to implement the Scientific Outlook on Development, government functions of China have to be transformed. As part of government departments, the administration function of tax office should transform from the management control-oriented to service-oriented mode, and the transformation can not be achieved without the support of a strong tax information system. Tax information system is one...学位：工商管理硕士院系专业：管理学院高级经理教育中心（EMBA项目）_高级管理人员工商管理硕士(EMBA)学号：X200715605

Establishment and Improvement of Rat Liver Transplantation Model and Comparison on Transplantation Rejection in Various Strain Combinations of Rats

摘要 背景和目的构建一个稳定而具有典型移植排斥反应的动物模型是肝脏移植研究的基础。大鼠原位肝脏移植模型是最常用的模型之一。本实验研究的目的就是建立改良的大鼠原位肝脏移植模型，并通过对不同品系大鼠肝脏移植模型的比较，探索理想的急性排斥模型，同时检测T细胞亚群在急性排斥反应中的表达。 研究方法采用Kamada[1]“双袖套法”建立大鼠原位肝脏移植模型，对术中供肝的分离、切取、灌注、植入以及术后的护理观察等方面进行改良；以大鼠SD（供体）→SD（受体）为对照组，建立Wistar→SD、Lewis→BN、DA→Lewis三种不同品系组合的大鼠肝脏原位移植排斥模型，在术后恢复情况、生存时间、...Abstract Background and Objective Construction of stable and typical animal model is foundational for research on liver transplantation. Orthotopic liver transplantation in rat is one of the most widely used models in this field. The objective of this study is to construct a modified rat liver trans-plantion model and explore the optimum acute rejection models of various strains combination o...学位：理学硕士院系专业：医学院临床医学系_外科学学号：2452007115257

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

区域医疗物联网监管平台总体规划与设计

目的:解决当前医疗物联网应用中顶层设计缺乏和标准不统一的问题,加强医疗物联网数据监管,充分利用物联网可穿戴设备采集的数据,辅助医生及时有效地进行疾病预防干预和治疗。方法:采用Hadoop、REST、Hbase等关键技术,构建区域医疗物联网监管平台,实现健康监护,并以厦门慢病全程健康管理为切入点进行应用与实践。结果:医疗物联网监管平台在厦门全程慢病管理中的成功应用,能有效辅助基层医疗卫生机构管理者进行监管决策,辅助家庭医生进行健康照护,提升了居民的满意度与家庭医生的服务存在感。结论:区域医疗物联网监管平台能够为医院管理者和医务人员提供有效的健康数据支撑,辅助医务人员为患者提供个性化的预防和治疗解决方案,提升医疗服务水平与居民的满意度

Rearch on wire bending technique

传统的线材弯曲工艺在产品种类较多且交货时间较短的场合,越来越难以满足要求。本文利用数控技术和简单的折弯模具,提出了一种线材弯曲成形的方法。该方法通过在数控系统中对线材制品形状进行编程,在短时间内完成不同形状零件的加工。其强大的制造柔性,完全能够满足工业界日益增长的“即时制造“生产需要和产品的随时换代升级。The traditional wire bending technics is becoming difficult to meet the needs of the market which requires more types of products and shorter delivery time.The NC technology and simple standard bending dies were used in a new method of wire bending.Through programing in the NC system,parts in all sorts of shapes can be completed very quickly,which thoroughly satisfies the growing industrial requirement of "immediately create" production and that for the upgrade of products at any time.厦门市科技计划项目(3502Z20071099

Biological characteristics of mesenchymal stem cells from bone marrow versus adipose tissue in rats

背景:除骨髓外,人们已从胎盘组织、脐带血肌肉组织、脂肪组织中分离到了间充质干细胞。目的:比较大鼠脂肪和骨髓间充质干细胞生物学特性和免疫调节功能的差异。方法:脂肪间充质干细胞和骨髓间充质干细胞分别来自bn大鼠的脂肪和骨髓。体外分离、纯化脂肪和骨髓来源间充质干细胞,进行细胞形态、表面标志、生长动力学、分化潜能鉴定;混合淋巴细胞反应比较两种细胞的免疫调节特性。结果与结论:脂肪间充质干细胞与骨髓间充质干细胞光镜和透射电镜下形态相似,第3代的脂肪间充质干细胞和骨髓间充质干细胞均高表达Cd29,Cd90,低表达Cd34,Cd45,Cd11b;第3,4,5代脂肪间充质干细胞增殖速度明显快于骨髓间充质干细胞;两者都具有低免疫原性,可以抑制异基因抗原引起的T淋巴细胞增殖,且这种抑制作用与细胞数目成正相关,等量脂肪间充质干细胞和骨髓间充质干细胞抑制作用差异无显著性意义。结果证实脂肪间充质干细胞具有和骨髓间充质干细胞同样的低免疫原性和免疫调节功能。BACKGROUND:Except bone marrow,people have collected mesenchymal stem cells (MSCs) from placenta tissue,cord blood muscle tissue and adipose tissue.OBJECTIVE:To compare the difference in biological characteristics and immunoloregulation of rat adipose-derived MSCs (ADSCs) and bone marrow MSCs (BMSCs).METHODS:ADSCs and BMSCs were obtained respectively from adipose and bone marrow of BN rats.ADSCs and BMSCs were isolated and purified in vitro to determine cell morphology,surface marker,growth kinetics and differentiation potential.Immunoloregulation of ADSCs and BMSCs was compared in mixed lymphocyte response RESULTS AND CONCLUSION:Morphology was similar between ADSCs and BMSCs under an optical microscope and transmission electron microscope.ADSCs and BMSCs at passage 3 highly expressed CD29 and CD90,weakly expressed CD34,CD45 and CD11b.The proliferation speed of ADSCs at passages 3,4 and 5 was obviously faster than BMSCs.Both ADSCs and BMSCs possessed low immunogenicity,could suppress allogenic antigen-induced T lymphocyte proliferation.Moreover,this inhibitory effect was positively associated with cell number.There were no significant differences in inhibitory effects of an equal volume of ADSCs and BMSCs.Results verified that ADSCs had the same low immunogenicity and immunoloregulation as BMSCs.卫生部科学研究基金——福建省卫生教育联合攻关计划资助(WKJ2005-2-020);厦门市科技计划社会发展项目(3502Z20064020)资助课题名称:外周血干细胞移植诱导肝移植术后免疫耐受的实验研究---

基于提高变分模态分解的齿轮箱复合故障特征提取

在实际工况下,齿轮箱故障经常包含多个故障信息,而弱故障信号相比强故障信号和噪声属于微弱信号,故复合故障中的弱故障信号提取一直是旋转机械故障诊断的一大难点。基于上述问题,考虑到MED（Minimum Entropy Deconvolution）具有强降噪性能、VMD（Variational Mode Decomposition）分解出的本征模态函数在强噪声环境中会失真、VMD分解精度由惩罚因子α和分解次数k决定,提出了一种基于MED-VMD的滚动轴承微弱故障提取方法。首先对原信号用MED降噪;进一步设置初始参数α和k,对降噪后的信号通过VMD分解,计算相邻本征模态函数的相关系数,确定最佳惩罚因子α和分解次数k;最后对本征模态函数进行包络谱分析,提取了齿轮箱中轴承的微弱故障信息。通过仿真信号和实测数据均验证了所提方法的有效性,给强噪声环境的复合故障的微弱故障特征提取提供一种新思路