Smoothed particle hydrodynamics modeling and simulation of foundry filling process

A numerical model of foundry filling process was established based on the smoothed particle hydrodynamics（SPH）method.To mimic the constraints that the solid mold prescribes on the filling fluid,a composite treatment to the solid boundaries is elaborately designed.On solid boundary surfaces,boundary particles were set,which exert Lennard-Jones force on approaching fluid particles;inside the solid mold,ghost particles were arranged to complete the compact domain of near-boundary fluid particles.Water analog experiments were conducted in parallel with the model simulations.Very good agreement between experimental and simulation results demonstrates the success of model development.

基于Cloud Foundry的PaaS云平台的设计与实现

随着网络和云计算的快速发展,出现了越来越多的网络资源,对网络资源的共享、管理以及按需分配是云计算的一个重要的研究方向。PaaS平台即服务是云计算的一个重要服务类型,无论是对学校研究还是企业应用都有着很大的吸引力。利用PaaS平台,可以降低项目开发的成本和周期,还可以提高项目对外提供服务的质量。针对现有的公共PaaS平台不适合大连理工大学做研究以及使用的状况,设计并实现了一套基于Cloud Foundry的PaaS平台。实践表明,本平台不仅有效地利用了资源,还使得部署其上的云应用更有弹性。

加速发展Foundry是我国实现IC强国的一条重要途径

本文介绍了国内外晶圆代工市场和主要晶圆代工厂商的概况。我国要实现IC强国必须加速发展晶圆代工产业。

基于Cloud Foundry云平台的网络考试系统实现

介绍了基于Cloud Foundry云平台的网络考试系统设计.在STS环境下通过添加"Cloud Foundry Integration"的扩展插件,开发者可通过虚拟机实现对Cloud Foundry云平台应用的可视化部署与管理.应用借助云服务可访问云上MySQL数据库.重点围绕考试系统的组卷、试卷显示、交卷评分处理等环节,介绍了用Spring MVC框架设计相应的控制器、模型及视图显示的编程处理方法.系统采用Json串实现试卷信息在页面之间传递处理.

半导体企业经营模式的转变——由IDM到Foundry和Fabless

最近几年，半导体行业波动较大，但Fabless和Foundury两种模式总体上数量和规模都在扩大，而IDM却在分化，重新考虑经营策略和自己的定位问题，并逐步向Fabless和Foundury模式转化。中国半导体行业目前的发展模式正好顺应了世界潮流，其前途非常光明。

STS实现Cloud Foundry云平台应用部署

STS(Springsource Tool Suite)是Spring应用开发的一个强大工具,Cloud Foundry是Spring Source提供的一个开源云平台。在STS中通过添加Cloud Foundry扩展可支持云应用部署,对云平台上个人虚拟机的服务器及应用进行管理。分析了Cloud Foundry的架构组成,讨论了将Web应用部署到云环境的具体操作过程,重点针对云数据库访问、文档管理应用以及面向消息应用,分析了在云环境下编程要注意的问题。最后,给出了一个网络教学系统样例以及云应用部署的优劣分析。

Foundry高举XFP大旗 为万兆以太网安排命运

以太网(Ethernet IEEE 802．3)．令牌总线(Token Bus，IEEE 802．4)和令牌环(Token Ring．IEEE 802．5)曾一度并列局域网领域最具影响力的三大标准。经过20多年的发展．以太网技术不但在局域网领域上升为唯一的霸主．更是在广域网市场中占据一席之地。并且．随着万兆以太网(IEEE 802．3ae)标准于2002年6月的正式推出，以太网的霸主地位变得更加不可动摇。

养Foundry鱼,先灌Fabless水

Foundry与Fabless的鱼水之情人所共知,Foundry客户国际化也是必然,但本地Fabless的支撑作用却是不能忽视的。就在大家准备过新年之际,中芯国际（SMIC）总裁张汝京在深圳宣布,公司已与深圳市政府达成协议,通过注册成立中芯国际集成电路制造（深圳）有限公司,投资15.8亿美元先后各建一条新的8英寸和12英寸芯片生产线及一家研发中心。

开源软件社区开发者协作网络结构演化分析——以Cloud Foundry社区为例

已有关于开源软件社区协作模式的研究针对开发者协作网络的静态结构展开了广泛探讨,对其结构演化特性的分析相对较少。本文以Cloud Foundry社区为例,通过代码修订关系构建开发者协作网络,并对其结构和演化过程进行了分析。研究结果表明开发者协作网络的演化以其最大连通子图结构变化为标志,分别为“松散连接”状态、“链式”结构和具有“核心—边缘”结构的多模块小世界状态。最大连通子图的演化过程与子项目内在关联。此外,开发者协作关系表现出倾向性连接、同质相吸、差异偏好相结合的特征。本研究有助于进一步认识开源软件社区协作的模式,亦是对大规模群体开放式协作创新活动的研究工作的丰富。

Cloud Foundry:第一个开源Platform as a Service

本文介绍了VMware近期新推出的一个开源PaaS项目:Cloud Foundry。PaaS是Platform as a Service的缩写,意思是平台即服务。PaaS将软件部署,运行和维护整合成一种服务,以SaaS(Software as a Service软件即服务)的模式提交给开发人员。开发人员可以快速地在其上进行软件开发部署,运行和扩展,而不用去搭建和维护硬件设施,安装软件中间件。将开发人员从软件部署,运行和维护软件的工作中解脱出来。本文指出了现代软件系统的新特点及遇到的挑战,介绍了PaaS的概念、Cloud Foundry的架构,分析了Cloud Foundry与业界现有几款PaaS相比的优点。最后,对PaaS未来的发展方向做了展望。

Research and application of enterprise resource planning system for foundry enterprises

PPDB issues-four aspects of current management issues of foundry enterprises are discussed in this paper,including Production Management,Process Control,Duration Monitoring and Business Intelligence Data Analysis.Also a whole Enterprise Resource Planning(ERP) solution for foundry enterprises is proposed.The solution contains many models,four of which are used to solve the PPDB issues.These are called SPDB models,which separately are the Single-piece management model(based on casting lifecycle),Process management model(based on task-driven technology),Duration monitoring model(based on surplus period),and Business intelligence data analysis model(based on data mining).An ERP system for foundry enterprises,named HZERP,was researched and developed,and applied to a sand casting company of single piece and small batch production.Qualitatively and quantitatively comparing the application effect before and after implementing the HZERP system,the result demonstrated that the foundry ERP system based on the SPDB models can help metal casting enterprises achieve the single-piece management,better regulate the production processes,improve production and delivery management,shorten the production cycle,reduce costs,and speed up the capital turnover to a large extent.

Silicosis in Automobile Foundry Workers: A 29-Year Cohort Study

Objectives The purposes were to determine the relationship between silicosis among foundry workers and their cumulative exposure to silica dust, and to establish a regression model to predict the risk for developing silicosis by a given length of employment and air concentrations of silica at worksites. Methods A 29-year cohort study was conducted, including all those employed for more than one year during January 1, 1980 to December 31, 1996 and all members of the cohort were followed-up to December 3 1, 2008. In total, 2 009 workers of an automobile foundry in Shiyan, Hubei province were recruited in the study, 1 300 at eight worksites including sand preparation, cast shakeout, and finishing, melting, moulding, core-making, overhead crane operation and pouring as exposed group, and the other 709 auxiliary workers at the same factory, such as electricians, inspectors, fitters, and so on, as control group. Person-years of observation were calculated by persons observed and years followed-up for each of them. Person-year incidence of silicosis and its relative risk （RR） or odds ratio （OR） and 95% confidence intervals （CI） among the workers were estimated, adjusted for relevant factors with logistic regression model using SPSS version 15.0 software. Results Totally, 2 009 workers were followed-up for 37 151 person-years and 48 cases of silicosis were found, with an overall incidence of 1.34 per thousand, 2.02 per thousand in exposed group, and 0.15 per thousand in control one. Risk of silicosis was significantly higher in the exposed group than that in the control one （RR=13.13, 95% CI 3.18-54.13）, higher in men than that in women （RR=13.92, 95% CI 1.92-100.93）. Risks of silicosis varied by job, highest in those exposed to cast shakeout and finishing （RR=28.14, 95% CI 6.43-123.11）, followed by those exposed to pouring （RR-22.23, 95% CI 5.01-98.55） in the foundry. Average length of employment at onset of silicosis was 25.94 years, and silicosis incidence increased with length of employment. Average age at onset of silicosis was 47.83 years old. The risk of silicosis in workers with pulmonary tuberculosis was 2.57 folds as those without it （P〈0.01）. Ten deaths were recorded in those with silicosis, with a case-fatality rate of 20.83 percent three of them died of lung cancer, three of liver cancer, two of ischemic heart disease, and two of other diseases as their immediate causes of death. Incidence of silicosis in foundry workers positively correlated with their cumulative silica exposure （OR-3.00, 95% CI 2.34-3.83）. Risks of silicosis increased by 4.38 folds with an increase of 1 mg/m^3-year of cumulative silica exposure, and by 3.79 folds with smoking, respectively, adjusted for alcohol drinking and age. Based on a logistic regression model fitted, incidence of silicosis is expected to be 44.6 per thousand for those with daily exposure to silica of 4.18 mg/m^3 in average for 30 years, and if incidence of silicosis is expected to be less than 1 per thousand, daily exposure to silica should be controlled below 0.2 mg/m^3 for those with 20 years of employment, or below 0.1 mg/m^3 for those with 30 or 40 years of silica exposure. Conclusions At present, foundry workers in China still face high risk of developing silicosis. For lowering occurrence of silicosis in exposed workers, it seems necessary that current occupational exposure limits for silica at worksites in China should be reexamined and silica dust control measures be strengthend.

Energy conservation and emissions reduction strategies in foundry industry

Current energy conservation and emissions reduction strategies in iron and steel industry were reviewed. Since foundry industry is one of the major source of energy consumption and pollution emission (especially CO 2 ), issues concerning energy-saving and emission-reduction have been raised by governments and the industry. Specialists from around the world carried out multidimensional analyses and evaluation on the potentials in energy conservation and emissions reduction in iron and steel industry, and proposed various kinds of analyzing models. The primary measures mainly focus on the targeted policies formulation and also on clean and highefficient technologies development. The differences and similarities in energy conservation and emission reduction in foundry industry between China and other countries were discussed, while, the future development trend was also pointed out.

Additive manufacturing and foundry innovation

Additive manufacturing is expected to transform and upgrade the traditional foundry industry to realize the integrated manufacturing and rapid and low-cost development of high-performance components with complex shapes.The additive manufacturing technology commonly applied in casting mold preparation(fusible molds,sand molds/cores and ceramic cores)mainly includes selective laser sintering(SLS)and binder injection three-dimensional printing(3DP).In this work,the research status of SLS/3DP-casting processes on material preparation,equipment development,process optimization,simulation and application cases in aerospace,automotive and other fields were elaborated.Finally,the developing trends of the additive manufacturing technology in the future of foundry field are introduced,including multi-material sand molds(metal core included),ceramic core-shell integration and die-casting dies with conformal cooling runners.

基于Cloud Foundry架构的统一应用开发平台建设方案研究

为打造智能蒙华生态圈,统一的企业级云开发与运行环境是必不可少的。利用Cloud Foundry的开源云架构,从多种角度与层次上研究设计了开发平台的架构,构建一个架构柔性、功能完备、性能卓越、自我诊断、自我调优和方便易用的统一应用开发平台。平台提供企业级服务,具有平台即服务(PaaS,Platform as a Service)和数据即服务(DaaS,Date as a Service)的特性,可实现快速开发、快速部署和云应用快速集成,使用者可以不懂安装配置应用的方法,也可以方便快捷地在开发平台上找到需要的服务来创建、部署和管理所需的应用程序。

Review of current research and application of ductile cast iron quality monitoring technologies in Chinese foundry industry

There is a long history of studying and making use of ductile cast iron in China.Over the years,the foundrymen in China have carried out a lot of valuable research and development work for measuring parameters and controlling the quality in ductile cast iron production.Many methods,such as rapid metallographic phase,thermal analysis,eutectic expansion ratio,surface tension measurement,melt electrical resistivity,oxygen and sulfur activity measurement,ultrasonic measurement and sound frequency measurement,have been used and have played important roles in Chinese casting production in the past.These methods can be generally classified as liquid testing and solid testing according to the sample state.Based on the analysis of the present situation of these methods applied in the Chinese metal casting industry,the authors consider that there are two difficult technical problems to be currently solved in monitoring ductile iron quality.One is to seek an effective method for quickly evaluating the nodularizing result through on-the-spot sample analysis before the liquid iron is poured into the mould.The other is to find a nondestructive method for accurately identifying casting quality before castings are delivered.

Fatigue Life Evaluation Method for Foundry Crane Metal Structure Considering Load Dynamic Response and Crack Closure Effect

To compensate for the shortcomings of quasi-static law in anti-fatigue analysis of foundry crane metal structures,the fatigue life evaluation method of foundry crane metal structure considering load dynamic response and crack closure effect is proposed.In line with the theory of mechanical vibration,a dynamic model of crane structure during the working cycle is constructed,and dynamic coefficients under diverse actions are analysed.Calculation models of the internal force dynamic change process of dangerous cross-sections and a simulation model of first principal stress-time history are established by using the steel structure design criteria,which is utilised to extract the change of first principal stress of danger points over time.Then,the double-parameter stress spectrum is obtained by the rain flow counting method.The fatigue life calculation formula is corrected by introducing a crack closure parameter that can be calculated by the stress ratio and the effective stress ratio.Under the finite element model imported into Msc.Patran,crack propagation analysis is performed by the growth method in the fatigue integration module Msc.Fatigue.Taking the metal structure of a 100/40t-28.5m foundry crane with track offset as an example,the accuracy of calculation results and the feasibility and applicability of the proposed method are verified by theoretical calculation and finite element simulation,which provide a theoretical basis for improvement of the fatigue resistance design of foundry cranes.

Curing reaction and mechanism of phenol-formaldehyde novolac resins for foundry

In this study on the curing dynamics of phenol-formaldehyde novolac resins(PFNR) and hexamethylene tetramine(HMTA), two typical commercial PFNR were selected as examples and the curing reactions of the resins with HMTA were studied by differential scanning calorimetry(DSC). Based on the data calculated by the Kissinger equation and the Crane equation, a thermocuring dynamic model was established, from which the process conditions, activation energy, reaction kinetics equation and a f irst-order reaction of the curing reactions were derived.

模拟型Foundry的实验性研究

Foundry是集成电路工艺的一种特殊营运模式,本文报道了适用于模拟型ASIC的Foundry研究工作的初步结果。

Foundry at Shenyang University of Technology

The discipline of foundry at Shenyang University of Technology (SUT) was founded in 1952, and began to enroll postgraduate students in 1979. And in 1981, the discipline was qualified to confer master’s degree, which was one of the first majors who had the right in China. And in 1984, she was granted as the key discipline by the former Chinese Ministry of Machinery Industry. In 1998, according to the new Catalogue for Undergraduate Specialties issued by the Ministry of Education, the discipline of foundry was adjusted to be involved by the new generalized discipline of Materials Processing Engineering. The new discipline was granted as one of the key disciplines of Liaoning province, and was qualified to have the right of conferring doctor’s degree the same year. The discipline of foundry at SUT has a very strong staff of teaching and scientific research. At present, there are 23 staff members, including 1 academician (dual employment), 5 doctoral supervisors, 10 professors, 4 associate professors, 3 lecturers, 1 senior research engineer,