铝电解电容器芯包引脚刺孔机控制系统设计

针对目前铝电解电容器芯包引脚刺孔中存在的自动化程度低、劳动强度大等不足,设计了铝电解电容器芯包引脚刺孔机控制系统,并提供了电气硬件和软件系统设计方案.该系统以三菱FGA系列PLC为核心,结合步进电机、振动盘、气缸以及光纤传感器和位置传感器等元件的检测定位,实现华司自动上料、芯包移动、引脚刺孔、芯包翻转等工序的自动连续运行.现场调试运行表明:该系统运行可靠平稳,操作简单,劳动强度低,能够满足生产线高效率、高质量的自动化加工要求.     

C800包装机烟包外观检测装置的设计

目的为了解决GDX6S包装机出口至烟包输送通道、烟包存储装置、C800包装机入口处烟包输送、存储、包装等过程中容易导致烟包外观质量缺陷,而且无任何检测装置对其进行有效检测与剔除的问题。方法设计一种新型烟包外观视觉检测装置,通过对其关键技术的研究,综合工业相机及触发脉冲信号的安装,全方位可旋转支架的设计制作与安装,动态图像的采集与处理,PLC控制程序的设计等,实现烟包外观缺陷产品的动态检测及准确剔除。结果该外观视觉检测装置安装后,对烟包外观缺陷产品检测剔除率≥99%,误检率≤0.9%。结论该烟包外观检测装置能提升产品质量,降低物耗,提高设备作业率,降低有缺陷烟包进入下道工序的风险,可推广应用于行业内所有包装机组设备上。     

众包激励的交互设计策略研究——以风陵渡地区末端快递众包为例

通过研究风陵渡地区末端快递众包激励因素，提出激励风陵渡村民参与末端快递众包的交互设计策略。首先通过文献研究法梳理了众包激励理论模型；其次根据风陵渡末端快递服务实地调研的结果细化了该地区的众包激励模型；最后在整理出激励风陵渡居民参与末端快递众包的交互设计策略之后，利用 Likert量表设计的调查问卷对上述交互设计具体策略进行验证，研究了其有效性和有效程度。研究发现在激励风陵渡村民参与末端快递众包的交互设计策略之中，提高快递众包任务过程的透明度、对参与者进行个性化推荐、设置金钱奖励机制、设置劳力积分兑换和使用机制、设置荣誉等级机制并建立快递众包社区这五项策略对村民的激励作用较大，而确保快递众包平台的可用性和易用性、为村民营造快递众包平台安全环境、设计符合村民心理模型的快递众包任务流程、预防快递众包任务的失效并及时提供错误反馈这四项策略具有一定的激励作用，但激励力度不大。     

标签裹包折标机构设计

目的设计一套标签裹包折标机构。方法基于机构设计理论与方法,将解析法与Auto CAD辅助作图法相结合,对裹包折标执行机构进行参数设计;利用Solid Works软件的建模工具,对裹包折标机构进行局部结构建模设计。结果针对矩形纸板标签及特定裹包要求,设计提出了标签裹包折标的系统机构原理,以最小传动角理论对关键折标机构完成了参数化设计,并设计了结构模型,理论上验证了设计的标签裹包折标机构的可行性。结论设计的标签裹包折标机构适用于刚性或柔性物体包装,为标签裹包系统设计及技术应用提供了理论参考。     

开包机纸箱推料系统的设计

为了解决开包机在倒出纸箱烟包过程中出现卡料问题,设计了一种以气缸驱动的纸箱推料装置,改进后提高了设备安全性及有效作业率。     

“包与不包”之间——论适度包装设计过程中的“度”

重新审视包装设计中的过度包装问题,阐述在适度包装设计过程如何把握设计的"度"。通过对产品"包"与"不包"状态的分析,提出了"全包""半包"与"不包"的概念,在满足保护、美化产品、促进销售的同时,可以通过极简主义设计方法实现"全包"的适度与人性化,也可以通过全过程的综合设计实现"半包"的互动性,还可以充分利用环保新材料以及设计师的价值观引导体现"不包"的理念,采用更合理的包装形式实现有效的包装设计,进一步提升品牌形象及品牌社会责任。     

平装书籍打包机包书作角部件结构设计

从平装书籍打包机的工作流程出发,分析了影响包书质量的包书作角部件的结构设计方案。方案运用图解法对有关重要的尺寸进行了设计并校核,为提高打包机生产效率和包装质量进行了探索。     

立包包装机出口烟条缺包检测装置的设计

目的 为了解决立包包装机不能有效检测和自动剔除烟条缺包不合格产品的问题。方法 设计一套基于光子检测的烟条缺包检测装置,通过对X射线管、高压电源、X射线探测器、主控板、显示屏、缺包烟条剔除机构、OPA354和AMP02降增益二级放大、高斯滤波处理、检测移位程序的设计等,实现立包包装机产生的缺包烟条不合格产品的全部检测并准确剔除。结果 该光子条缺包检测装置安装后,其缺包烟条检出剔除率≥99.9%,误剔率≤0.01%。结论 该光子条缺包检测装置能提升产品质量、降低物耗、提高设备作业率、降低缺包烟条进入下道工序的风险,可推广应用于行业内所有包装机组设备上。     

平面二包环面蜗杆参数化精准建模研究

平面二包环面蜗杆具有许多优点,实体建模有助于其设计与分析.通过分析齿轮啮合原理,推导出平面二包环面蜗杆齿面方程及平面方程.利用微增量原理,求出蜗杆的交线方程.利用VB,Matlab和Solidworks软件结合所推导公式进行联合编程开发,建立了平面二包环面蜗杆的实体参数化建模系统.同时推导误差解析法计算公式,对软件建模实例进行误差分析,结果证明该建模方法是有效、可行的.该方法使得平面二包环面蜗杆复杂的建模过程简单化,提高了设计效率,有利于平面二包环面蜗杆的推广使用.     

亚包中心召开亚包大厦概念性设计方案邀标会

标志着亚包中心建设进入正式实施阶段的亚包大厦概念性设计方案邀标会，于2005年5月20日在亚包中心召开。同济大学建筑设计研究院、现代设计集团华东建筑设计研究院有限公司、浙江省建筑设计研究院、华中科技大学建筑与城市规划设计研究院、中南建筑设计院、华南理工大学建筑设计研究院等著名设计单位应邀参加了会议。     

基于ANSYS的温控包装圆柱体模型的建立

为简化温控包装设计计算,对实际温控包装系统建立了不同的圆柱体模型。将实际温控包装箱尝试向不同圆柱体模型转化,使其设计方法更简便易行,借助ANSYS软件对其进行了热传递分析和数值模拟,利用转换模型的温控时间与实际温控系统的温控时间之间的相对误差,对各模型进行了筛选。结果表明,采用的圆柱体模型与原立方体温控包装箱的内体积、厚度相等时,最能真实反映实际保温箱的传热过程。为降低包装成本、优化温控包装设计方案提供了依据。     

圆柱与圆锥轴线相交时左侧相贯线上最右点的解析证明与图解

轴线相交的圆柱、圆锥两曲面立体相贯时,产生左右两条空间相贯线曲线。该文以左侧相贯线为研究对象,用数学方法证明圆柱立体的半径在一定范围内变化时,左侧相贯线上最右点的变化规律,由此提出了准确绘制左侧相贯线上最右点的图解方法。左侧相贯线上的最右点在两条特殊相贯线上,分别在锥和与锥相切的球的相贯线上及在柱和与锥相切的球的相贯线上。     

基于MSPCA的缸盖振动信号特征增强方法研究

针对发动机缸盖振动信号信噪比低的问题,提出了基于多尺度主元分析的故障特征增强方法。将缸盖振动信号小波包分解后,利用主成分分析对所有子带系数进行坐标变换,信号重构后再进行小波包分解,计算新坐标系下各子带的能量作为发动机故障的特征向量。仿真信号验证了本文所提算法对微弱冲击信号的增强能力,与支持向量机结合用于发动机十一种故障的诊断实例表明,故障分类准确率可达到98.76%。     

Evaluating eigenvalues for boundary value problems of heat conduction in rectangular and cylindrical co-ordinate systems

A method of evaluating eigenvalues for any combination of the first, second and third boundary conditions of heat conduction in a plate, a solid cylinder or a hollow cylinder is described. Some general relationships between eigenvalues are derived. Based on these relationships a universal algorithm is developed. A list of a package of computer subroutines is included.     

Handbook of Statistics,Volume l—Analysis of Variance

Probability plots are popular graphical tools used by reliability engineers and other practitioners for assessing parametric distributional assumptions. They are particularly well suited for location-scale families or those that can be transformed to such families. When the plot indicates a reasonable conformity to the assumed family, it is common to estimate the underlying location and scale parameters by fitting a line through the plot. This quick-and-easy method is especially useful with censored data. Indeed, the current version of a popular statistical software package uses this as the default estimation method. In this article we investigate the properties of graphical estimators with multiply right-censored data and compare their performance with that of maximum likelihood estimators. Large-sample results on consistency, asymptotic normality, and asymptotic variance expressions are obtained. Small-sample properties are studied through simulation for selected distributions and censoring patterns. The results presented in this article extend the work of Nair (1984) to right-censored data.     

Transverse electric scattering by a dielectric biconvex cylinder loaded with a shallow circular trough in a ground plane

The scattering problem of transverse electric wave from a dielectric biconvex cylinder buried in a shallow circular trough of a ground plane is investigated and a rigorous series solution is also derived. Based on the region-matching method, the analysed region is decomposed into two subregions by introducing a semi-circular auxiliary boundary. The magnetic field of each subregion is expressed in terms of cylindrical wave functions with unknown expansion coefficients. After imposing the matching conditions and the boundary condition on the trough surface with the aid of Graf's addition theorem, the unknown coefficients are determined. Comparisons with published data for a dielectric circular cylinder case show very good agreement. Visible effects of depth-to-half-width ratios of a dielectric biconvex cylinder on echo width, far- field pattern and near-field distribution are illustrated in graphical form.     

Finite element analysis of deformation and fracture of an exploded gas cylinder

This paper presents the finite element simulations of deformation and fracture of a gas cylinder which catastrophically failed as a result of an accidental explosion. The results of a previous detailed investigation of this incident indicated that detonation of a low-pressure oxygen-rich mixture of hydrogen and oxygen was the cause of the cylinder failure. In the current study, the finite element method was used to provide a more realistic modeling of geometry, material behavior, and boundary conditions of the cylinder. The overall transient dynamic response of the cylinder to gaseous detonation loading was studied using the ANSYS/LS-DYNA V10 package and the crack growth simulations were performed using the WARP3D-R15 research code. The crack growth analyses were performed using interface cohesive elements. The finite element results were validated using analytical solutions and data collected from the remains of the cylinder. The simulations clearly showed that the stresses caused by the assumed loading profile were indeed capable of creating local ruptures at the actual crack initiation sites. It was also shown that the self-similar growth of the initial axial crack in the main body of the cylinder was a fatigue-type incremental growth governed by the structural waves. The subsequent cyclic bulging of the crack flaps and the resultant crack curving and branching were also simulated.     

Freezing time predictions for regular shaped foods: a simplified graphical method

A graphical method is proposed for the estimation of freezing times of foods been developed from the predictions of a numerical model which solves the heat balance for a food undergoing freezing. The method is valid for foods with different shapes (flat plate, cylinder and sphere) and covers a wide range of working conditions for industrial freezers. It also enables the prediction to be made for any given end temperature in the thermal centre of the food. Freezing times predicted by this method have been compared with published experimental data, giving an average error in the predicted values of only 4%.     

面向C型货包的短距加速撞击试验装置及应用

目的 为C型货包90 m/s撞击试验提供新的试验方法和手段。方法 采用基于压缩空气驱动和反向牵引的短距加速技术，以及基于阻尼缓冲缸–迪尼玛绳的短距拦阻技术，建立新型高速重载撞击试验方法，并形成试验装置。结果 实现了负载大于5 t、速度大于90 m/s的大质量试件短距发射和撞击。结论 该试验装置与以往常用于C型货包撞击试验的火箭橇和高空缆绳相比，具有占地少、建设成本低、可调性和重复性好、测试方便、运行经济安全等特点，为C型货包的空运事故场景模拟与考核提供了一种新手段，同时也可为其他类型货包或装备的公路、铁路等运输事故场景模拟与考核提供试验技术支撑。     

以"天人合一"探究中国包装设计

从中国的传统意象图形符号入手,来研究包装设计对这些意象符号应用的象征意义.从这些图形的应用中,可以感受到中国"天人合一"的观念在东方包装设计中的应用.例如"方、圆、葫芦形、方碑形、象形文字、书法文字"等图形元素等.因此可以得出结论:中国大多传统化包装设计的构图、造型、图形元素的应用,深受"天人合一"的观念影响,是一种民族文化心理结构的契合.