水质自动监测系统的运行管理和质量控制

介绍北疆供水工程顶山水质自动监测系统建设的概况,分析近几年在系统运行过程中遇到的难题及解决方案,结合实践经验,对水质自动监测系统的运行管理和质量控制进行探讨。     

浅谈县级环境监测站的质量管理工作

环境监测质量管理是环境监测工作的重要组成部分，应贯穿于监测工作的全过程。我站环境监测质量管理工作存在多方面的不足，本文以环境监测工作质量管理工作现状、问题、对策进行探讨。     

公路工程施工质量管理的几点思考

工程建设是一个系统,影响工程质量的因素很多。本文对公路工程的施工质量管理问题及施工质量控制进行了探讨。     

关于环境空气自动监测质量控制的探讨

环境空气质量的自动监测已从初步发展期进入质量提升期。自动监测系统虽以整体性的仪器及计算机系统构成,但同样易受到认为因素的影响,从而导致监测质量的低效。只有在全面掌握系统信息技术基础上发挥行为主体的主观能动性,加强管理制度完善及工作协调,才能确保自动监测系统的高效、持续运行。     

基于质量监测的高价值装备包装系统设计与实现

目的适应高价值装备储运管理要求,研究设计带有质量监测功能的包装系统,监测高价值装备在储存与运输过程中受到的人为和自然因素的影响。方法设计包装监测系统,即采集终端、信息终端、管理分析软件系统等子系统,记录装备在储运过程中的冲击、温度、湿度、时间、位置、声音等信息,构建装备储运信息采集、传输、分析与管理平台,对装备质量状态进行分析与评估。结果具备质量监测功能的包装系统可全程追溯装备储运过程,准确掌握装备质量状态。结论高价值装备包装系统的质量监测功能可完善装备技术保障全寿命信息链,实现装备的精细化保障,是未来包装发展的新趋势。     

电视台音视频质量监测系统及其应用

在概述电视台音视频质量监测系统的基础上,分析电视台音视频质量监测系统的框架及主要功能,并探讨相关设备的测试、应用问题;以期对促进电视台节目的高质量播出有所启示。     

电能质量在线监测系统的设计与实现

本文通过对电能质量在线监测基本功能的分析，提出一种电能质量在线监测系统，并对该系统的设计结构、系统功能模块进行说明。     

浅谈工程施工质量管理具体措施

建筑工程的质量管理师一项系统的工程，涉及的范围十分广泛，只有认真做好各个环节的工作，才能真正搞好建筑工程的质量管理。文本对建筑工程施工管理进行了相关探讨。     

三相电能质量智能监测系统的设计

随着工业技术的发展,大量电力电子设备的使用导致电能质量的恶化。为保证电网的安全运行,需要对电网电能质量进行有效的监测。本文设计了基于电能计量芯片ATT7022B的三相电能质量智能监测系统,对硬件及软件设计进行了论述。经实际测量,该监测系统实时性好、测量精度高,并具有良好的人机界面。     

AV系统监理质量控制工作的探讨

本文结合对深圳卷烟厂AV系统的质量管理体会,介绍了AV系统的质量控制过程、质量控制重点和难点,在无AV系统质量验收规范遵循情况下,对AV系统实施规范化的质量管理进行了探讨。     

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.     

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...     

The Research of Anti-Wear Properties of Organomolybdenum Compounds in the Engine Oils

A four-ball tester was used to evaluate the anti-wear performance of three kinds of organomolybdemun compounds in the engine oils, i. e., molybdenum dialkyldithiophosphate (MoDDP), molybdenum dialkyldithiocarbamate ( MoDTC), and sulphur and phosphorus freeorganomolybdeum (Molybdate). The results indicate that a low concentration of MoDDP doesn' t improve the anti-wear properties of the commercial engine oils, but a high concentration of MoDDP can obviously improve the anti-wear properties and the load-carrying capacity of the engine oils. MoDTC doesn' t improve the antiwear properties of the engine oils, but worsens the anti-wear properties of the oils. Signifi can timprove ment of frictional and wear characteristics is obtained with Molybdate added in the commercial engine oils and the formulated oils.     

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.     

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.     

Synthesis of Alumina-Zirconia Nanocomposites by Solgel Process

Al₂O₃-ZrO₂ nanocomposites were developed starting with the solgel process. Composite alumina-zirconia nanopowders were synthesized from metallorganic precursors (Aluminium secondary butoxide and zirconium Iso propoxide) using the solgel process. The parameters affecting the synthesis—solvent, concentration of precursor, R/H ratio (i.e., dilution of water in solvent)—were varied as also the temperature and pH. BET and TEM were used to measure nanosize. Diffuse reflectance spectroscopy and also qualitative optical absorption led to identical particle size estimate. The variation of process parameters was used to study the effect and interdependence of process parameters. Artificial Neural Networks was used to rigorously analyze the process. Although this led to confirmation of interdependence of parameters, the presence of a single overwhelming solvent variable was also established. Then the optimal process was used to synthesize more nanopowder. To produce bulk nanocomposite the nanopowders were sintered by varying the temperature and time period. The sintered lithoids were probed with a vickers hardness tester to measure elastic modulus, hardness, and fracture toughness. The results showed high elastic modulus, modest hardness, and very high fracture toughness.     

Certification Becomes Important for the I Quality; and Safety Supervision of the Chinese Liquor Sector

The end of 2007, over 200 unit products of more than 80 Chinese firms have passed the quality grade certification for liquor products. These products involve distilled spirits, beer, wine, yellow wine, fruit syrup wine and others, and cover over 80% of the national top-branded liquor products.……     

Deposition and Coating Properties on CVD Tungsten

Surface characterization and microstructure studies are performed on chemical vapor deposited (CVD) tungsten coating. There is about 2 μm thickness diffusion layer of tungsten in the molybdenum substrate. The thermal shock test shows tungsten coating has good adhesion with molybdenum substrate, but the elements of oxygen and carbon in the tungsten coating have the bad affection to the adhesion. The result of high-temperature diffusion experiment is the diffusion rate from molybdenum substrate to tungsten coating is faster.