东方振动和噪声技术研究所主要产品——INV303/306多功能系统和DASP与东方科卡

一、主要功能: 1、信号自动采集:定点触发、瞬态捕捉,大容量长时间采集分析和记录。 2、数字示波器和十六道磁带记录器功能:可随时开、并、存数据和调波形分析。 3、各种时域、幅域、频域的波谱分析功能:概率、相关、谱、传递、相干等等。 4、模态分析和结构动力学修改,结构灵敏分析;结构动力有限元分析。 5、故障诊断和状态监测;桩基检测与瑞利波分析;地震和天然脉动记录分析。     

国外兵器包装的发展趋势

兵器包装必须满足运输、储存和方便部队使用的基本要求。在兵器运输和储存中,必须防止水、水蒸汽、氧、空气中携带的二氧化硫和盐粉等有害物、风、尘、紫外线、霉菌和昆虫等的腐蚀和侵害。电子产品、     

争做行业先锋 致力于服务特殊混合产品制造业

德国AZO公司产品广泛应用于食品、医药、化工和人造材料行业。其中包括粉末状和液体物料的储存、卸料、过滤、筛分、输送、配料、秤重和混合，配备有最先进的过程控制技术。德国AZO公司长期致力于混合设备产品的研发和创新，是全球范围内该领域的先锋和开拓者。     

《制冷技术》征稿要求

1.文稿用WORD软件编写。在A4纸输出时,页面设置为上边距4.1 cm,下、左、右边距均为2 cm;论文篇幅一般不超过4页。2.论文内容应包括:中文标题、作者姓名、单位名称和邮编、摘要、关键词、英文标题Title、英文作者姓名、单位名称和邮编、英文摘要Abstract、英文关键词Keywords、正文、参考文献和作者简介等。参考文献和计量单位按标准书写,基金项目请提供基金编号。3.标题、作者姓名、单位名称和邮编、摘要、关键词等部分用单栏排版,正文、参考文献和作者简介等     

英国建筑行业的标准化

用于指导最佳行为、风筝标志制度和管理体系的英国标准和规范对建筑行业帮助很大,同时,也使用户即那些在该建筑中居住或工作的人受益。标准的影响无处不在———砖和砂、屋顶和窗户、管道工程、保温层、电气系统、居室用具,等等,无不受着标准的制约。现在有关建筑产品和过程的标准很多,选择余地大。这些标准包括集料、沥青、水泥、水泥瓦、混凝土、干衬壁、石灰、纤维增强产品、玻璃、石膏、五金、木构件、砌块、砂浆、铺路材料、塑料、卫生设备和配件、灰饼、密封胶、木料、石材、防水层和木板等。还有组合件,如门、窗、地板、天花板、隔断…     

浅谈当好女工干部应具备的能力和素质

能力，是指完成一项工作、做好一件事情的本领。索质，是指人的体质、品质、才智和内在涵养，即才干和道德力量。女工干部是广大女工中的佼佼者，是有能力、高素质的女工。当好女工干部应具备组织管理、沟通协调、贯彻执行、开拓创新、借势借力和语言表达六个方面的主要能力和政治、道德、心理和知识四个方面的基本素质。     

公司简介

上海浦检电子技术有限公司是一家专门从事机动车检测设备代理、配套、安装、电脑联网和维修的专业公司。本公司内设有:研发部、生产部、工程部、综合管理部、营销部和维修部。主要技术设计人员和维修人员来源于上海大学通信学院和原上海恒正电子技术有限公司。目前已为多家国内知名检测厂家代理、配套、维修机动车检测设备和电脑配套联网。     

游戏在体育教学中的运用

体育游戏是按一定目的和规则进行的一种有组织、有意识、创造性的和主动性的体育活动。其特点:有一定的情节和思想性、竞争性和娱乐性。它内容丰富,形式多样,趣味性强。对全面发展学生的身体素质,提高活动能力和掌握知识技能等有积极作用。还能培养学生遵守纪律,团结互助的集体主义精神和勇敢、顽强、机智、果断等优良品质和作风。因此,在教学训练中被广泛应用。     

医院标准化管理简论

医院管理标准化,是通过制定和实施标准,对医院的管理目标、行为标向、技术规程、医疗质量、设备效用和服务方式等定量化和定性化。其主要内容包括框范和制定标准、实践和追踪标准、评估和修订标准三个方面。医院标准化管理具有科学性、导向性、实践性、协同性、权威性和权变性特征。实施医院标准化管理,是医院科学管理的客观要求,与国际现代医院科学管理接轨的必然趋势和深化医院改革的内在辏力。     

欧洲锁具标准

<正>欧洲锁具标准EN12209:2003由CEN/TC 33("门、窗、百叶窗、建筑五金和幕墙")技术委员会编写。这一标准详细说明了建筑用的机械锁、锁舌和扣板的耐久性、强度、安全性和功能的具体要求与测试方法,不包含以下锁具装置和相关产品:锁芯、执手、电控锁和电扣板、多点锁和它的扣板、窗户锁、挂锁、保险箱锁、家具锁和监狱锁。这一标准的最大特点是对很多指标分别进行了级别的划分。     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

From Industry 4.0 to Research 4.0. Development of High Performance Fibers in the Light of Digitization

We associate a variety of innovations with the term ＂Industry 4.0＂. The pioneer of many 4.0 modifications forms the basisfor the trend towards the integrated di...     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Roman iron and steel: A review

ABSTRACT

The production of ferrous metal increased during the Roman Late Republican period, Principate and Empire. The direct bloomery process was used to extract the metal from its ores using slag-tapping and slag-pit furnaces. The fuel was charcoal and an air blast was introduced by bellows-operated tuyères. Iron formed as a bloom, often as a spongy mass of metal, which contained impurities from the smelting process, including unreacted ore, fuel, slag and fragments from the furnace walls, while the metal was often inhomogeneous with varied carbon contents. Blooms were either smithed directly into bars or ingots or they were broken up, which also allowed the removal of gross impurities and a selection of pieces with similar properties to be made. These could then be forge-welded together and formed into characteristically shaped ingots. Making steel in the furnace seems to have been achieved: it depended on the ore and the furnace and conditions within it. Surface carburization was also carried out. Iron and steel were used extensively in construction and for tools and weapons. Fire welding was often used to add pieces of steel to make the edges of tools and weapons, which could be heat-treated by quenching to harden them.     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

A study of centrifugal cast high boron high speed steel

In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M₂(B,C), (W,Mo)₂(B,C), M₃(B,C), M₂₃(B,C)₆ type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm². The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K₁ mill housing of bar mill.     

Thixotropy of Systems with Shear Thinning and Plastic Flow Behavior

The definition of the thixotropy is a decrease in viscosity with time in shear and a subsequent recovery of viscosity after the shear deformation is removed.We ...