新时代经济发展之秘诀——工业设计

在经济高速发展的新时代，工业设计是适应市场竞争的有效途径。很兴地方经济需要地方特色的工业设计，很兴中国的经济需要有民族特色的工业设计。     

积极发展中高档数控机床——大型、高速、精密、多轴、复合和高效专用数控机床

国务院国发[2006]8号文件《国务院关于加快振兴装备制造业的若干意见》的发布和实施，为我国数控机床制造业提供了很好的发展机遇。机床工业是装备制造业的基础，振兴装备制造业首先要振兴机床工业。机床工业中数控机床的水平直接关系到国家经济建设和国防安全。所以，加快高档数控机床的研发，满足国民经济和国防建设的需要，是近年机床工具行业致力奋斗的目标。现将相关行业急需和进口的中高档数控机床主要产品介绍如下，供企业产品开发参考。     

东北振兴战略进入新阶段五金业发展迎时机

10月20日,国家发改委副主任张国宝在国新办举行的“实施东北地区等老工业基地振兴战略新闻发布会”上表示,东北等老工业基地振兴工作将进入新阶段。东北老工业基地振兴战略的实施将扩大东北地区五金产业的腹地开发,使五金产业找到新的经济增长极,为东北五金企业区域经济的发展迎来契机。     

中国装备，装备中国

装备工业是国家的支柱产业,是国民经济的母机,是经济拉动能力最强的产业之一,工业增加值占到我国GDP的8％左右,在金融危机的大环境下国家把装备工业作为国家要重点调整和振兴的十大产业之一,不仅因为他量大,还因为它的振兴关系到其他产业的振兴,关系列国家的经济安全,关系到装备制造业在全球经济新布局中占到怎样的地位。     

为汽车行业提供"一体化"服务

吉林省是国家重要的重工业生产基地之一,汽车、轨道客车、化工、电子信息、制药、农产品加工等制造业一直是吉林省工业的主体.作为振兴东北老工业基地省份之一,作为科技部实施"地方制造业信息化科技示范工程"示范省份之一,吉林省始终坚持把推进制造业信息化作为提升制造业自主创新和竞争能力的必然选择.     

推广应用计算机技术加速振兴机械工业

一今年是"七五"计划的第一年."七五"期间是我国经济发展和经济体制改革的关键时期,也是振兴机饿工业的关键时期.机械工业是为国民经济各部门提供装备的.现在,大规填进口机电产品的时代已经过去,国民经济和人民生活所需要的机电产品必须依靠国内的机械工业来提供.同时,要积极开拓国际市场,加快调整出口产品的构     

微型米机与南方特色农机产业县的兴起

对南方特色农机产品——微型多功能组合米机的性能特点及其发展过程中出现的问题进行了论述,总结分析了"微型米机之乡"湖南省双峰县农机工业发展的经验,探索了振兴地方特色产业的新模式,对行业区域经济成长过程中存在的问题进行了剖析,提出了促进可持续发展的新思路。     

适应市场需求,培养高职工业设计人才

随着经济全球化的发展,商品竞争日趋激烈,高职工业设计教育面临巨大的挑战。本文通过调研分析市场对工业设计人才的素质要求和目前高职工业设计人才培养存在的主要问题,提出适应市场需要培养高素质高职工业设计人才的建议。     

深化改革 抓住重点 加速振兴

1994年全国机械L业L作会议于1月18日至ZI日在京召开。这次会议根据落实党的十0大、十四届三中全会和全国经济工作会议精神，分析了机械工业面临的形势，围绕建立社会主义市场经济体制，进一步研究了机械工业深化改革、加速振兴的问题，讨论机械、汽车工业振兴规划纲要和产业政策，部署了1994年的重要1作，动员全行业职L为机械工业持续、快速、健康发展，把机械、汽车工业早日建成国民经济的支柱产业而努力奋斗。振兴机械、汽车工业需要长期艰苦的努力，扎扎实实地进行。近期，要重点抓好以下几项工作。第一，切实做好振兴规划纲要的贯彻落…     

北方你没理由不自信

北方是中国最早的工业基地,是国家经济建设的支柱,这里大型的装备制造企业云集.经过半个多世纪的发展,北方形成了基础牢固、实力雄厚,设计制造和成套能力强的制造业体系,成为国家现代化建设的基础,是国家实现工业化和现代化的源泉.在经历了装备制造业发展的低迷期之后,21世纪世界产业的重点再次转向装备制造业,北方老工业基地是极富后发优势的地区,这里装备制造业的振兴必然倍受瞩目.     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

On the Relation of Load to Average Gap in the Contact Between Surfaces with Longitudinal Roughness

A computer simulation model for the contact between longitudinally-oriented rough surfaces has been formulated. This model closely duplicates the actual surf ace contact deformation behavior by taking into account the elastic interactions between the asperities. There were no assumptions made about the shapes, or any deformation behavior of the asperities, except for their obeying the laws of elasticity. The plastic deformations on the high asperity peaks were taken into account by setting a ceiling on their contact pressures at the material hardness value. The simulations used real surface profiles which were digitized from unworn circumferentially ground steel surfaces. Each pair of these profiles was mathematically combined to form an equivalent rough profile pressing against an infinitely rigid flat and having the appropriately adjusted elastic modulus. A total of 28 different pairs of profiles were used in the simulations. Each contacting pair was subjected to 30 different load levels and the local contact pressures and deformations were calculated. The contact simulations yielded some important mathematical relationships between parameters, such as the real area of contact, average gap, and average asperity load through statistical curve fitting. Two analytical functions were generated to relate the average load to average gap and the real area of contact to load.     

三绕组变压器的双绕组等效建模及在Matpower中的应用

针对实际电网存在着大量的三绕组变压器,但国际上一些著名商业软件,如BPA仿真软件、Matpower这一权威潮流计算开源软件,均只提供双绕组变压器模型,限制了其在具有三绕组变压器的电力系统中的应用的问题,潮流计算是自主开发的电力系统各种应用软件的核心模块,因此依托国际权威开源程序进行二次开发,是一种较好的选择。对Matpower要求的数据格式进行了归纳,对变压器的一般的等值电路及带理想变压器的等值电路和带标幺值的等值电路进行了分析研究,提出了三绕组变压器转换为双绕组等效模型的建模方法,使得原先只适应双绕组变压器的潮流计算软件可以适用于三绕组变压器电网的潮流计算;最后以Matpower软件为例进行了案例计算,并用PSASP仿真软件进行对比验证。研究结果证明,所提出的建模方法是有效的。     

Quantum Cooperative Robotics and Autonomy

The intersection of Quantum Technologies and Robotics Autonomy is explored in the present paper.The two areas are brought together in establishing an interdisci...     

电站锅炉模糊风险评价方法研究与应用

针对电站锅炉风险等级评价问题,将模糊综合评价技术应用到电站锅炉风险等级评价中。开展了电站锅炉失效影响因素及模糊评价因素的重要程度分析,建立了一套科学合理适于在线评价的电站锅炉风险评价体系,提出了模糊综合评价技术与改进的模糊层次分析法相结合的模糊风险评价方法,利用改进的模糊层次分析法计算了指标体系中各层指标权重。对某一台电站锅炉的实际运行工况影响子因素进行了模糊风险评价,采用模糊合成算子进行模糊综合运算得到电了站锅炉运行工况影响子因素的评价向量。研究结果表明:电站锅炉的运行工况影响子因素的风险评价等级为第6级,失效可能性等级为小,该电站锅炉运行工况良好。     

考虑进油孔有限长滑动轴承油膜力的近似解析解

针对具有进油孔的有限长滑动轴承油膜力求解问题,采用变分原理和分离变量法,求得了有限长滑动轴承油膜压力分布的近似解析表达式。将油膜压力分布的近似解析表达式在油膜存在区域上进行积分,即得到了油膜力。将提出的计算有限长滑动轴承油膜力方法与无限长轴承模型、有限元方法的计算结果进行了比较,发现了提出的方法与有限元方法的计算结果很接近。最后,研究了进油孔位置和进油压力对油膜存在区域、油膜力等的影响,研究结果表明进油孔位置和进油压力对油膜存在区域和油膜力有较大的影响。     

Fifth International Summer School on Screw-Theory Based Methods in Robotics

正3-11 September,2014University of Bologna,Bologna,Italy www.summerscrews.org summerscrews2014.ing.unibo.it SUMMER 20SCREWS 14In 2014,our screw-theory school comes to the world's oldest university.In early September,Summer Screws'14 will gather six experts in the application of screw theory in robotics and up to 40 participants at the University of Bologna,Bologna,Italy.The school will teach attendees how to apply existing methods and empower them to develop new ones in their own research.The basic theoretical notions will be introduced in a rigorous manner,emphasizing examples,applications,and exercises.Scholarships are available.     

交通荷载作用下桥梁结构参数识别方法

应用动力节点加载法,将作用在桥梁上的交通荷载转化为等效节点荷载,再用两步构造法识别结构物理参数.第1步,用Newmark-β方法变换结构运动方程,并用结构的加速度响应求得变换空间内的位移、速度和加速度响应;第2步,基于最小二乘原理,构造出变换空间内求解结构参数的递推式,进行结构物理参数识别.数值模拟结果表明,在交通荷载作用下,该方法能够快速、准确地进行桥梁结构参数识别.     

INDUSTRIAL ENGINEERING AND VISUALISATION-A PRODUCT DEVELOPMENT PERSPECTIVE

Taking the actual project of teaching and researching process for example, the relationship between the industrial engineering and product development is discussed. And use the novel visualization technology to support the industrial engineering and product development. How to use the new computer modeling and simulating technologies to support the product development and industrial engineering, is introduced especially. The support includes both domestic products and industrial systems. The visualization and computer technologies take a very important role in some system or multi-direction modeling, those technologies mentioned above can help the industrial engineers study the effect of design on the whole life circle, including the producing steps. So the engineers can avoid making the wrong decision which may cause bad effects on the whole industrial engineering.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.