偶联剂KH和聚合物PVA在硫铝酸盐—MDF水泥中的作用机理

以硫铝酸盐水泥为基材，采用有机聚合物ＰＶＡ，并且在ＭＤＦ水泥中添加偶联剂ＫＨ，制备出抗折强度大于１７０ＭＰａ，抗压强度达２４０ＭＰａ的新型ＭＤＦ水泥。同时，借助于Ｘ射线光电子能谱分析（ＸＰＳ），红外光谱分析（ＩＲ）等测试手段研究了偶联剂ＫＨ和聚合物ＰＶＡ的硫铝酸盐－ＭＤＦ水泥中的作用机理。     

AMPS-DMAEMA两性聚合物溶液性能的研究

研究了自制的两性聚合物ＡＭＰＳ－ＤＭＡＥＭＡ（简写为ＡＳＤＡ）组成与等电点的关系。制得了等电点状态下的两性聚合物ＡＳＤＡ－５０（ｐＨ＝５）。推导出了等电点下的两性聚合物溶液的比浓粘度与聚合物浓度无关的表达式，并用实验证实了这一关系式。利用ｐＨ的影响制得了与ＡＳＤＡ－５０具有相同分子量、相同分子链结构的单性聚电解质ｄＡＳＤＡ－５０。二者的对比研究表明，ＡＳＤＡ－５０具有明显增大的特性粘数。     

偶联剂KH和聚合物PVA在硫铝酸盐─MDF水泥中的作用机理

以硫铝酸盐水泥为基材，采用有机聚合物ＰＶＡ，并且在ＭＤＦ（Ｍａｃｒｏ—Ｄｅｆｅｃｔ—Ｆｒｅｅ）水泥中添加偶联剂ＫＨ，制备出抗折强度大于１７０ＭＰａ，抗压强度达２４０ＭＰａ的新型ＭＤＦ水泥、同时，借助于Ｘ射线光电子能谱分析（ＸＰＳ），红外光谱分析（ＩＲ）等测试手段研究了偶联剂ＫＨ和聚合物ＰＶＡ在硫铝酸盐－ＭＤＦ水泥中的作用机理     

新型渗透汽化透水膜的研制（II）：膜的结构和性能

确定聚合物共混的相容性最常用的方法是通过测定共混物的玻璃化转变温度（Ｔｇ），本文利用ＤＳＣ－７（Ｅｐｓｏｎ）测定了不同共混比的ＰＶＡ，ＣＳ共混物的玻璃化转变温度，结果表明ＰＶＡ，ＣＳ之间有良好的相容性。本文利用扫描电子显微镜（ＳＥＭ），红外光谱（ＩＲ）和Ｘ－射线衍射（ＸＲＤ）等现代分析仪器，对研制的多元酸交联的ＰＶＡ－ＣＳ／ＰＳＦ膜结构进行了观察测试，探讨了膜结构与性之间的关系。     

固体高分子凝胶电解质Ⅱ．含混合极性有机物的交联聚醚高分子凝胶电解质

研究了采用低粘度的丙烯碳酸酯（ＰＣ）和高介电常数的计甲基乙醚胺（Ｎ－ＭＡ）以一定比例混合作极性有机物组分时高分子凝胶电解质的结构和性能。结果表明，该体系较采用单一的ＰＣ在Ｎ－ＭＡ时的离子导电率更高。离子电导率的提高反映了组成的有机混合物中各单一组分的优势互补作用，即低粘度ＰＣ对体系有强的增塑作用，和高介电常数Ｎ－ＭＡ对体系介电常数有明显的提高作用。Ｘ射线衍射谱和ＤＳＣ谱研究表明，该种混合极性有机物组分的交联聚醚高分子凝胶电解质体系的锂盐的适当用量为ＥＯ／Ｌｉ＝４／１～３／１，它的室温离子电导率可达１０－３Ｓ／ｃｍ数量级以上。     

LaCaO3基固体电解质在SOFC中的应用

对锶镁掺杂的镓酸镧（Ｌａ０．９Ｓｒ０．１Ｇａ０．８Ｍｇ０．２０３,简写为ＬＳＧＭ１０２０）电解质的电化学性能进行了初步的研究,并以它为电解质,Ｎｉ－ＣｅＯ２为阳极,Ｌａ（Ｓｒ）ＭｎＯ３为阴极制作了ＳＯＦＣ测试电池。对Ｈ２－ｏ２电池的伏安特性进行了测试。用能量损失谱（ＥＤＳ）研究了测试电池断面各种元素的分布情况。结果表明,本研究中得到的ＬＳＧＭ电解质有中温离子电导率高,高温电导率偏低的特点。在不同的温度范围氧离子迁移数均接近于１。测试电池的最大输出功率密度为６７．７ｍＷ／ｃｍ＾２,最大电流密度为１２６．３ｍＡ／ｃｍ＾２。ＥＤＳ结果显示,作为电解质主要元素之一的Ｇａ发生了从电解质到阳极的扩散过程,而作为阳极主要成分之一的Ｎｉ也扩散到了电解质中。这可能是导致测试电池最大输出功率和最大电流密度偏低的主要原因。可以认为,     

AM-AMPS-DMDA水溶性疏水两性共聚物溶液性能的研究

采用自由基共聚合反应制备了水溶性丙烯酰胺（ＡＭ）／２－丙烯酰胺基－２－甲基丙磺酸钠（ＮａＡＭＰＳ）／２－甲基丙烯酰氧乙基－二甲基十二烷基溴化铵（ＤＭＤＡ）疏水两性共聚物。对共聚物稀溶液性质及聚合物组成、聚合物浓度、电解质浓度、温度、剪切速率等因素对共聚物溶液性能的影响进行了研究。结果表明，由于在同一聚合物中引入了疏水结构及两性离子结构，这类疏水两性聚合物表现出较好的耐温抗盐等性能。     

红外焦平面阵列用信号处理电路技术探讨

简要介绍了红外焦平面阵列的信号处理电路的发展概况，重点描述ＣＣＤ多路传输器（ＣＣＤ－ＭＵＸ）时间延迟积分ＣＣＤ（ＴＤＩ－ＣＣＤ），ＭＯＳＦＥＴ，ＣＭＯＳ等路传输器（ＣＭＯＳ－ＭＵＸ）等的基本结构，工作方式及应用领域。     

SPS／P（AM—DMDAAC）分子复合型驱油剂的研究

研究了聚阴离子磺化聚苯乙烯（ＳＰＳ）和聚阳离子（丙烯酰胺－二甲基二烯丙基氯化铵）共聚物（Ｐ（ＡＭ－ＤＭＤＡＡＣ）在水溶液中的聚电解质分子复合，结果表明，在二者的离子度及配合比例适当时能形成稳定的均相复合溶液体系，具有明显增粘效果，复合溶液比组分聚合物溶液粘度增加３．５倍，组分聚合物ＳＰＳ较为刚硬的分子结构使复合溶液在高温，高剪切环境下具有良好的粘度保持能力，可望作为油田膜油剂得以应用。     

AMPS—DMAEMA两性聚合物

研究了自制的两性聚合物ＡＭＰＳ－ＤＭＡＥＭＡ，推导出了等电点下的两性聚合物溶液的比浓粘度与聚合物浓度无关的表达式，并用实验证实了这一工。利用ＰＨ的影响制得了与ＡＳＤＡ－５０具有相同分子量、相同分子链结构的单性聚电解质ｄＡＳＤＡ－５０。二者的对比研究表明，ＡＳＤＡ－５０具有明显增大的特性粘数。     

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.     

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.……     

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.     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.     

新闻(英文)

正China and Greece Sign the Standardization Cooperation Agreement Witnessed by Chinese Premier Li Keqiang and Greek Prime Minister Antonis Samaras,AQSIQ Minister Zhi Shuping and ELOT Chairman and Executive Director Angelos Tolkas signed the SAC-ELOT Standardization Cooperation Agreement.The Agreement is one of the critical cooperation documents signed during Li Keqiang’s visit in Greece,encouraging China and Greece to