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产品简介
所谓平板电视机,是指把成像部件或显示屏幕做成平板形状的一种电视机。广义的定义是:所有实现了显示屏平面化的且外形呈平板状的电视机就是平板电视机。目前平板电视机主要是等离子(PDP)电视机和液晶(LCD)电视机。 相似文献
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一、CAS132-2006的制定背景及工作过程随着科技的发展,平板显示技术的成熟,平板电视机的售价越来越低,开始走入寻常百姓家,并成为一部分消费者更新电视机的首选。平板电视机作为高科技产品,使用中要受到各种因素的影响,如温度、湿度、电磁干扰、光线、位置等。如何科学地安装,保证产品的安全、正常使用,并发挥最佳效果,需要一套安装服务标准来指导。但目前国内还没有统一的安装服务标准,有些企业甚至临时雇佣人员安装,轻者影响收视效果,重者给产品和用户使用带来极大的安全隐患,严重侵犯消费者合法权益。国内急切需要一部标准进行规范,以… 相似文献
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13D的相关知识LCD液晶和PDP等离子是市场上平板电视机的两大主流技术(液晶电视机包括CCFL背光和LED背光两种,很多人把现在的LED背光源电视机与LCD电视机并列起来是错误的,特别是有些商家甚至生产厂家在这方面也有误导消费者之嫌)。 相似文献
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该文针对彩色平板电视机白色色度值检验工作,简要介绍了彩色平板电视机白色色度值指标的测试方法,详细分析了测试过程中各不确定度分量的来源,进而计算出合成标准不确定度和扩展不确定度。最后给出了不确定度测试报告。 相似文献
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北京、杭州等19个城市消费者组织共20家城市消费维权论坛成员单位联合向工业和信息化部、国家质量监督检验检疫总局递交建议函,大力呼吁将平板电视机及显示屏等主要部件纳入国家"三包"规定近一年之际,这一呼吁终于有了回音。国家质检总局日前发布《关于将平板电视机商品纳入<部分商品修理更换 相似文献
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2005年12月5日,国家标准化管理委员会高新技术部、中国质量协会、中国消费者协会、中国家用电器维修协会等部门召开“平板电视服务新标准研讨会”。海尔彩电在会上发布了针对平板时代的服务解决方案“三包六免”服务新模式,受到与会领导的肯定。近年来,平板电视快速进入千家万户,随之而来的服务问题也“水涨船高”。由于国家“三包”规定只包括彩色电视机和黑白电视机,因此高端平板电视的售后服务一直都是企业“各自为政”,没有统一的标准。(玉兵) 相似文献
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四、量块和角块研磨时可能产生的问题及原因 1.工作面烧伤烧伤的原因可能是平板压砂太少或打光平板次数过多,使平板最细处无切削力,加上研磨时间过长引起的。 2.表面粗糙度,不均匀。其原因是平板压砂太粗,打磨平板压力过小,修理时间过长,手力加偏,同时粗、细、精研区衔接不好。 3.工作面划伤。可能是压砂不均,嵌砂不牢,量块表面有毛刺,有灰尘。 4.量块塌边,中间凸。原因是平板平面不够凸,修理时间过长,量块定温冷却不够,平板两头砂少,技术不熟练等。 5.平面性太凹,两头塌边。可能是平板太凸,连续修理时间过长,没有定温冷却。 6.薄量块弯曲变形。平板无切削力,修理压力过大,研磨速度太快,对一面特别是凸面研磨时间过长。 相似文献
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Kamlesh Goel 《Scientometrics》2002,55(2):243-258
An analysis of gender differences in psychology in India provides quantitative and qualitative assessment of R&D output contributed by psychologists with the indication of the trend of growth, skewness, relatedness, co-authorship pattern of productivity. 相似文献
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The system for Metrology in Chemistry in Germany is described. At the national standards level, a network of high-level chemistry
institutes coordinated by the national metrology institute, PTB, provides the primary references for chemical measurements.
A dissemination mechanism employs chemical calibration laboratories accredited within the framework of the German Calibration
Service (DKD). They act as “multipliers” between the national standards level and the user level by providing the user with
calibration means which are traceable to the SI via national standards. Traceability structures in clinical chemistry, electrochemistry,
elemental analysis and gas analysis are described 相似文献
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Natural radioactivity in drinking water was determined in population-based random study of 472 private wells. The mean concentrations of (222)Rn, (226)Ra, (234)U, (238)U, (210)Pb and (210)Po in drilled wells were 460, 0.05, 0.35, 0.26, 0.04 and 0.05 Bq l(-1), and in wells dug in the soil were 50, 0.016, 0.02, 0.015, 0.013 and 0.007 Bq l(-1), respectively. Approximately 10% of the drilled wells exceeded a radon concentration of 1000 Bq l(-1) and 18% a uranium concentration of 15 microg l(-1). The mean annual effective dose from natural radionuclides for a drilled well user was 0.4 mSv and 0.05 mSv for a user of a well dug in the soil. The effective dose arising from (222)Rn was 75% of the total of all natural radionuclides for drilled well users. As regards long-lived radionuclides, (210)Po and (210)Pb caused the largest portion of the effective dose. The dose arising from (238)U, (234)U and (226)Ra was only 8% of the total of all natural radionuclides. 相似文献
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Radiation Protection Dosimetry 相似文献
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Ali KK 《Radiation protection dosimetry》2012,148(3):372-379
Activity concentrations of (226)Ra, (232)Th and (40)K in 45 samples of different building materials used in Iraq were measured using gamma-spectroscopy system based on high-purity germanium detector with an efficiency of 40 %. Radium equivalent activity, air-absorbed dose rate, annual effective dose, external and internal hazard indices and alpha index due to radon inhalation originating from building materials were measured to assess the potential radiological hazard associated with these building materials. The activity concentrations of the natural radionuclides (226)Ra, (232)Th and 40K were found to range from below detection limit (BDL) to 223.7 ± 9, BDL to 93.0 ± 3 and BDL to 343.1 ± 12, respectively. Values of average radium equivalent activity, air-absorbed dose rate, indoor and outdoor annual effective doses, external and internal hazard indices and alpha index ranged from 6.5 to 124.9, 16.2 to 89.5 (nGy h(-1)), 0.08 to 0.44 mSv, 0.02-0.11 mSv, 0.09 to 0.53, 0.13 to 0.69 and 0.03 to 0.62, respectively. These values indicate a low dose. Therefore, the building materials used in the current study are quite safe to be used as building materials. 相似文献
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一、采标工作的主要经验做法和取得的成绩(一)领导重视,机构健全是采标工作的有力组织保证沈阳市在消灭无标生产工作中,先后成立了区、县人民政府消灭无标生产工作领导小组,消灭无标生产工作阶段性完成后,根据国家质检总局要求相继改为标准化工作领导小组,领导小组由主管区长挂帅,各职能部门主要领导参加,为采标工作的开展提供了坚实的组织保证,并纷纷出台了一些保障措施。围绕实施名牌产品战略,市政府明确要求,在评选名牌产品时,产品必须首先采标,然后方可有资格参加名牌产品的评选。我们坚持对申报评选的产品进行跟踪,能够… 相似文献