用磁悬浮真空计校准电离真空计的研究

通过对国际上新颁布的两项ISO标准以及我国检定规程的剖析,利用我院比较法真空标准装置,对磁悬浮真空计校准电离真空计的方法进行了研究,并对不确定度进行了分析.     

基于ISO标准经济效益评估方法在中国开展的案例研究

国际标准化组织(ISO)在德国罗兰·贝格战略咨询公司的支持下,制定了一个方法来评估标准所产生的经济效益,目的是量化标准对组织产生的影响,并比较不同组织的评估结果。本文系统研究了ISO评估方法,介绍了ISO标准经济效益研究项目的基本情况及得到的初步结论。基于中国应用ISO评估方法开展的案例研究,探讨了如何基于中国国情完善ISO评估方法的思路。     

坐标测量机的ISO标准及释义

1994年,国际标准化组织(ISO)颁布了ISO10360—2“坐标测量机的性能评价”标准,此标准为技术委员会ISO/TC3(公差与配合)小组起草制定。ISO10360标准实际上是坐标测量技术(Coordinate Metrology),其中分为若千部分,现颁布的主要是第二部分,即ISO10360—2和第三部分ISO10360—3:以转轴为第4轴的CMM的性能评价。其它部分,包括术语定义,CMM的软件评价,代用几何元素的计算,坐标测量技术中的公差等仍在讨论之中。本文仅介绍ISO10360—2,并根据笔者的理解,对标准做一些解释。     

ASTM E 2187与ISO 12863标准异同性比较分析

ASTM E2187和ISO 12863标准为卷烟引燃倾向提供了测试方法,ISO 12863标准是根据ASTM E 2187标准制定的,但两者之间仍存在一些差异。对标准的异同性进行比较分析,可以更好地掌握标准的适用性和通用性。     

船舶振动ISO 20283-5新标准研究

目前,船舶振动标准越来越严格,而我国船舶企业对振动控制的关注程度还不够。2016年12月提出的新振动评价标准给我国船舶建造水平带来严峻挑战,对船舶企业产生重大影响。将新制定的振动标准ISO 20283-5:2016(E)与当前振动标准ISO 6954:2000(E)进行深入对比,讨论新旧标准的差异,并用新旧标准对实船试航结果进行评估,结果表明目前我国船舶建造水平还不能完全满足新标准的要求。船舶设计与建造人员需要对新标准进行仔细研究,才能提高我国的造船水平,使我国成为真正的世界一流船舶强国。     

ISO 25947-2 《烟花-第二部分:类别与级别》

正2017年11月3日,烟花爆竹国际标准颁布新闻发布会在湖南浏阳举行。新颁布的9项国际标准,实现了烟花爆竹行业国际标准零的突破,为全球烟花企业发展提供质量体系参考,体现了中国标准化的技术和能力。此次颁布的9项国际标准为两大系列标准(ISO 25947-1~5和ISO 2626-1-1~4),涵盖烟花专业燃放类和普通消费类产品的名词术语、标签、分级分类、结构和性能以及测试方法等内容。     

浅谈纸箱生产企业建立ISO9000质量管理体系关注点

随着社会主义市场经济体制的不断完善,产品质量竞争已成为市场竞争的最重要因素,企业都深感质量成为关系企业生死存亡的根本因素。为了提高质量管理水平,目前纸箱生产企业根据ISO9000标准纷纷建立质量管理体系,促使企业质量管理规范化、文件化、制度化,但也存在一些盲区。现就企业质量管理体系关注点进行探讨。首先是建立质量管理体系的依据,ISO9000标准原先94版本有三个认证标准,绝大多数纸箱生产企业选用未涉及设计与开发ISO9002:1994认证标准,2000年国际标准化组织(ISO)颁布了ISO9001:2000质量管理体系唯一认证标准。虽然纸箱产品…     

8508A数字多用表校准状态可信度的“期间核查”

本文是根据中国合格评定国家认可委员会颁布的CNAS-CL01:2006《校准和检测实验室能力认可准则》(ISO/IEC 17025:2005)的要求,对参考标准8508A型数字多用表进行核查,以保持其校准状态的置信度。     

标准

正9项烟花爆竹国际标准颁布实现烟花爆竹国际标准零的突破11月3日,9项烟花爆竹国际标准在湖南浏阳隆重颁布。一举改变了全球烟花产业没有通用标准的现状。此次颁布的9项ISO烟花爆竹国际标准为两大系列标准,即ISO 25947和ISO 26261。涵盖1、2、3和4级烟花的术语、分级分类、标签、结构与性能及使用说明等安全要求以及相关检测方法,适用于烟花产品基础应用,亦为其他烟花标准的基础。从内容来看,烟花的分级分类、术语界定和安全要求与中国国家标准大致相同,在药量、声级值、保质期、引燃时间等具体技术指标上,     

ISO14001和ISO14004标准的修订计划

为了确保ISO标准反映最新发展状态,ISO规则要求技术委员会对其公布、出版已满五年的国际标准进行研究,并决定是否修订,确认或撤消。 ISO环境管理体系(EMS)标准ISO14001(EMS——规范使用及指南)及ISO14004(有关EMS原则,体系和支持技术指南)对这个规则也不例外。1996年颁布的标准现正由ISO TC207环境管理技术委员     

Effect of Permeable Crystalline Material on Steel Reinforcement Corrosion of Concrete

Permeable crystalline materialcan permeate into pores and cracks of concrete and catalyze the reaction between Ca(OH) 2and unhydrated cement to generate a great quantity needle non-soluble crystals, which can stop up the pores and cracks of concrete, and increase the impermeability of concrete. This paper reported the results of a study conducted to evaluate steel reinforcement corrosion of concrete specimens uncoated and coated with permeable crystalline material as well as mixed with the permeable crystalline material. The properties evaluated for corrosion test were water impermeability, water absorption, compressive strength and potential. The results of water impermeability, water absorption, compressive strength clearly showed that the permeable crystalline material could prohibit water, any soluble salts and moisture from penetrating the concrete to cause corrosion, leaking, and other problems, and it did increase the compressive strength, which was favorable for protection of corrosion of reinforcing steel. Moreover, it was concluded from the potential-time curve that the steel reinforcement of uncoated specimen was in the state of activation whereas that of other specimens coated and mixed with the permeable crystalline material was in the state of inactivation. Above all, it was indicated that the permeable crystalline materialis very effective to protect the steel reinforcement of concrete from corrosion.     

The Research and Application About "Dry Peeling Off" Technology for Airplane Surface Paint Layer

In this paper, the principle of spurting take off lacquer were introduced; and with orthogonal method the unsaturate polyester was prepared ;it was easy to peel airplane paint layer off with this material and equipment.     

Quality Study of Honeycomb Core Shaping Without Wax Stabilization

Sandwich panels utilizing honeycomb cores result in lightweight, high-strength units that are very rigid. Indeed, they give honeycomb panels the best strength-to-weight ratio of any construction type available. Conventionally, the wax is poured into the cell of the core to strengthen the structure and prevent the core from being crushed during milling. Much time and labor is required to wax, mill, and clean the cores. In this study, the process of pouring wax into the core was skipped. In other words, the cutter directly milled the core. Experiments showed that the compressive strength of the core produced without wax stabilization was only 3% lower than that of cores produced using the traditional method. In addition, the drum peel strengths of cores produced without wax stabilization were 38.4% higher than cores produced using the traditional method, in which residual wax seriously polluted the adhesive. It was also found that eliminating the wax process can reduce costs.     

In-process thermal treatment of polylactic acid in fused deposition modelling

Polylactic acid (PLA) is one of the most widely used open source fused filament fabrication materials due to its ease of extrusion, biodegradability, and mechanical strength. The mechanical strength of PLA largely depends on the proper growth of its semi-crystalline structure, which can be severely impaired by a low rate of crystallization, particularly in open source printers. This can be further aggravated by the non-uniform thermal distribution of heat that causes improper curing among the extruded beads of the printing material. As a result, PLA printed on open source printers does not achieve the best mechanical properties. This research, for the first time, proposes an additive-free solution implemented through a detailed set of experimentation to improve the curing rate through in-process temperature variations to cure the joints among the beads. Scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy is used to confirm the improvements in the bead joints. This work is conducted in two phases of experiments. In the first phase, a full factorial ANOVA is used to investigate various process parameters and the important variables are used in the second phase to print test specimens in four different sets.     

Investigation of the Corrosion Behaviors of HVOF-Sprayed Carbide Cernet Coatings in Molten Al-Zn-Si Alloy Bath

In continuous hot-dip galvanization process the corrosion and chemical stability of the sink roll in the galvanizing bath are important problem which effects on the quality and productivity. In order to protect the sink roll the carbide cermet and/or ceramic coatings were deposited on the surface of the sink roll. The WC-, Cr3 C2-cermet coatings were deposited by high velocity oxygen fuel (HVOF) spray, respectively. The coating samples were immersed in molten Zn-alloy containing 50 wt % aluminum at 833 K for 24 hr and 144 hr, respectively. The inter-diffusion and inter-reaction of Zn, Al and elements in coating and corrosion behaviors of these coatings were investigated by XRD, SEM and EPMA etc. The corrosion mechanisms of the carbide cermet coatings and ceramic coatings in molten High Al-Zn-alloy were approached.     

Fundamental study of adhesion of ice to cooling solid surface (Discussion on influence of copper oxide layer on ice adhesion force)

In many situations, ice often adheres to a cooling solid surface, frequently causing serious accidents. It is critical to clarify the mechanism of ice adhesion to the cooling surface in order to prevent ice adhesion. In a past study, the shearing stresses of two kinds of test plates with a copper surface having the higher thermal conductivity were measured. The shearing stress corresponds to ice adhesion force. Both shearing stresses were significantly different; however, the cause remains unclear.Therefore, the present study focuses on an oxide layer as the main factor causing the difference of both shearing stresses; the influence of the oxide layer formed on shearing stress was discussed. And in the removal and reformation processes of the oxide layer, the time variation of the shearing stress was clarified. Moreover, the relationship between the state of the copper surface and the shearing stress was also clarified by surface analysis.     

重塑标准推行格局 推动LED照明的普及（英文）

正When you are enjoying the green,energy-saving and healthy lighting of IKEA LED luminaire,you may not realize that most of IKEA’s LED bulbs are produced by the LED luminaire smart manufacturing system of Hangzhou Zhongwei Photoelectricity CO.,LTD(ZVISION).No longer enclosed in the laboratory,the product standards are brought into the factory workshop and even to the entire production process.Thus,the standards are promoted and applied in a favorable way by enterprises,benefitting consumers with high quality products.     

Chinese Experts Contribute to ISO＇s New Toy Standards

正The international standard,ISO 8124-6,Safety of toys–Part 6:Certain phthalate esters in toys and children’s products,was officially issued by ISO worldwide on August 15.It was the first time for Chinese experts to lead the ISO standard development in toys industry.The standard was drafted by a group of Chinese experts from SAC/TC for toys and relevant Chinese departments and finally completed by a dedicated international group of experts.ISO 8124-6 makes a substantive breakthrough in the aspects of the scope of toys,limitation of plasticizer types,control of test cost,accuracy of test,operation convenience,etc.,offering the operational guidance for toy manufactures and testing laboratories.     

中国质量(北京)大会(英文)

正Themed on"quality,innovation,development",the first China Quality Conference(Beijing)was held in the Great Hall of the People on September 15.Chinese Premier Li Keqiang delivered an important speech at the conference.State Councilor Yang Jing and Wang Yong attended the conference with over 600 domestic and international representatives from foreign,regional and international quality organizations     

National Working Meeting on Land and Resources Standardization

正The National Working Meeting on Land and Resources Standardization was held in Beijing on July 15,2014.Wang Min,the Deputy-Minister of the Ministry of Land and Resources,and Yin Minghan,the Chief-Engineer of SAC addressed the meeting.Representatives from relevant competent departments and technical committees were present.The meeting aims to summarize work,discuss existing problems and make clear working thoughts,promoting standardization work of land and resources to a new level.Wang Min pointed out that the standardization work of land and resources should be centered on the basic principles of"protecting land and resources dutifully,intensively and economically utilizing land and resources,and making all-out efforts to safeguard the public’s rights and interests",highlighted the