电子万能材料试验机

电子万能材料试验机主要适合于橡胶、轮胎、胶管、胶带、鞋底、塑料、薄膜、压克力、FRP、ABS、EVA、PU、铝塑管、复合材料、防水材料、纤维、纺织、电线电缆、纸张、金属箔、带、丝线、弹簧、木材、医药包装材料、胶带等进行拉伸、压缩、撕裂、剥离等力学性能的测试、分析。     

人参栽培技术(待续)

人参,五加科,别名园参、山参、棒槌. 1.用途 人参以根入药.有大补元气、复脉固脱、补脾益肺、生津、安神之功能.用于体虚欲脱、肢冷脉微、脾虚食少、肺虚喘咳、津伤口渴、内热消渴、久病虚赢、惊悸失眠、阳痿宫冷、心力衰竭、心原性休克等症.近年来,人参及其制剂用于临床治疗心绞痛、糖尿病、肝炎、胃炎、哮喘、高血压和低血压、动脉硬化、冠心病、阳痿及性机能降低等病症,均收到良好效果.此外,茎叶亦可供药用.     

书讯

正《阀门手册——选型》——本书由化学工业出版社于2013年1月出版发行,张清双、尹玉杰、明赐东主编。全书针对阀门用户的实际需求,在介绍了各种阀门选型基本知识的基础上,重点介绍了各种阀门的结构、技术特点、应用场合及选用原则等内容,阀门种类包括闸阀、球阀、蝶阀、截止阀、止回阀、旋塞阀、柱塞阀、隔膜阀、电磁阀、节流阀、蒸汽疏水阀、减压阀、安全阀、调节阀、放料阀、塑料阀门、陶瓷阀门以及供水管网、水     

“全国第一届近红外光谱学术会议”在北京成功召开

由中国分析测试协会和中国石油学会石油炼制分会共同主办的全国第一届近红外光谱学术会议于2006年10月28日至30日在北京西郊宾馆的会议中心举行。来自清华大学、浙江大学、天津大学、南开大学、吉林大学、上海交通大学、西安交通大学、哈尔滨工业大学、中国农业大学、中南大学、第二军医大学、后勤工程学院、第二炮兵工程学院、海军航空工程学院、暨南大学、广西大学、首都师范大学、山东轻工业学院、中国计量学院、中科院光机所、中科院上海技术物理研究所、     

润华集团ERP系统的澎湃力

润华集团股份有限公司是一家跨地区、跨行业的综合性大型股份制企业集团,山东省政府确定的全省首批51家现代企业制度试点单位之一.经营领域涉及汽车销售、汽车修理、配件供应、旧机动车交易、客运出租、汽车租赁、机动车拍卖、房地产开发、制药、进出口贸易、物业管理、广告企划等众多行业,并参股金融业,基本确立了以汽车服务业、药业、房地产业为支柱产业,投资、贸易、实业协调并进的发展格局.     

2013上海国际施工机械、建材机械、矿山机械及专用车辆展览会

时间：2013-06-10～2013-06-12,地点：上海市龙阳路2345号上海新国际博览中心。展品范围：工程车辆、土方机械、道路施工和养护设备、管道和电缆铺设设备、起重运输设备、混凝土运输车、散装水泥运输车、重型卡车、轻卡、道路清扫车、清障车、警用车、运钞车、消防车、邮政车、牵引车、半挂车、自卸车、厢式车、罐式车、高空作业车、大型拖车、环卫车、园林作业车辆、桥梁检测车、机场专用车,冷藏保鲜车辆及零配件等。     

淄博永华 持续做专业的生产者

正淄博永华滤清器制造有限公司(如下简称淄博永华)是专业生产各种进口、国产内燃机滤清器、过滤器专业厂家。产品包括一汽、二汽、重汽、欧曼、奔驰系列重卡滤清器及各种轿车、客车、工程机械滤清器。公司员工300余人。目前产品销往全国各地,已为福田、潍柴集团、华丰、莱动、唐骏欧铃、常柴、全柴、五征、山拖等20余家主机厂、汽车厂及淄柴、安庆柴油机厂、陕柴重工、宁波中策等10余家船舶发动机、造船企业装机配套,远销美国、英国、印度、俄罗斯等10多个国家和地区。     

采访印记

2008年4月1-12日,由人民日报、新华社、光明日报、经济日报、中央电视台、中央电台、科技日报、工人日报、中国青年报、中国妇女报、农民日报、法制日报、新华网和经济参考报等14家中央媒体以及《工程机械与维修》杂志、《今日工程机械》杂志等行业媒体组成的工程机械创新报道团在中国工程机械工业协会的带领下,历时12天,先后走访了柳工、中联重科、三一、山河智能、杭叉、合叉、徐工和山推等8家企业。     

2007年中国机床工具行业十大新闻

1.中央和地方省市主要领导频繁视察机床行业企业,国家为数控机床产业发展创造了空前良好的发展环境 胡锦涛、吴邦国、温家宝、贾庆林、李长春等党和国家领导人以及辽宁、黑龙江、山东、江苏、云南、湖北、广东、陕西、浙江、天津、重庆等省市主要领导相继视察了机床工具厂和数控系统厂.各级领导频繁视察,为数控机床产业的发展创造了空前良好的发展环境.     

IEC/SC65A/MT 61511法国会议总结

(IEC/SC65A/MT 61511 中国代表团)2013年6月,IEC/SC65A/MT 61511工作组会议在法国里昂召开。共有来自美国、法国、英国、加拿大、奥地利、意大利、德国、澳大利亚、印度、巴西、芬兰、挪威、     

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...     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

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.     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...     

分布动态载荷识别的抗噪处理

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型.利用仿真算例,证实了该方法具有较好的抗噪性.     

基于MELTAC-N平台的核电厂安全级DCS环网研究与测试

针对工程实践中环网通讯相关问题的处理缺乏理论基础及国产化安全级DCS平台的开发缺乏成熟经验借鉴问题,对基于MELTAC-N平台核电厂安全级DCS环网的软硬件实现进行了研究。提出了安全级DCS环网双环网冗余设计、光切换开关设计等硬件设计方法,以及以RPR协议为基础,采用全数据收发策略的软件设计方法。在CPR1000安全级DCS平台上对安全级DCS环网的可靠性及实时性进行了评价,并进行了容错能力、响应时间及响应时间稳定性测试验证实验。结果表明,基于MELTAC-N平台安全级DCS环网软硬件设计具有较好的容错能力及响应时间稳定性。     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....     

The laboratory simulation of abrasive wear

Abrasive wear has long been recognised as one of the most potentially serious tribological problems facing the operators of many types of plant and machinery; several industrial surveys have indicated that wear by abrasion can be responsible for more than 50% of unscheduled machine and plant stoppages. Locating the operating point of a tribological contact in an appropriate operational ‚map’︁ can provide a useful guide to the likely nature and origins of the surface degradation experienced in use, though care must be exercised in choosing the most suitable parameters for the axes of the plot. Laboratory testing of materials and simulations of machine contacts are carried out for a number of purposes; at one level for the very practical aims of ranking candidate materials or surface hardening treatments in order of their wear resistance, or in an attempt to predict wear lives under field conditions. More fundamentally, tests may be aimed at elucidating the essential physical mechanisms of surface damage and loss, with the longer term aim of building an analytical and predictive model of the wear process itself. In many cases, component surface damage is brought about by the ingress of hard, particulate matter into machine bearing or sealing clearances. These may be running dry although, more usually, a lubricant or service fluid is present at the interface. A number of standardised wear test geometries and procedures have been established for both two- and three-body wear situations, and these are briefly described. Although abrasive wear is often modelled as following an ‚Archard’︁ equation (i.e. a linear increase in material loss with both load and time, and an inverse dependence on specimen hardness) both industrial experience and laboratory tests of particularly lubricated contacts show that this is not always the case: increasing the hardness differential in an abrasively contaminated lubricated pair may not always reduce the rate of damage to the harder surface.     

Limits of topographic measurement by the scanning tunnelling and atomic force microscopes

Parameters describing the topographic character of a surface (height, surface wavelength, slope and curvature) can be derived from equivalent sinusoidal profiles. The response of a surface-measuring instrument may be modelled in terms of instrument parameters such as stylus radius, and scanning range and resolution. The performance of the instrument may then be mapped as a zone in amplitude-wavelength (AW) space to show the sinusoidal profiles it is capable of measuring. In a first-order analysis the STM and AFM are considered as equivalent to contact-stylus instruments with a notional stylus radius equal to the tip radius plus the gap. Comparisons between different instruments and types of instrument are readily made by mapping in AW space. The error arising from convolution of the sinusoidal profile with that of the finite tip may be quantified and plotted as contours in AW space.