钢材无损检测试验方法标准体系述评

介绍了钢材无损检测试验方法标准体系,对国内外钢材无损检测标准体系进行了分析对比,阐述了我国无损检测标准的特点,介绍了无损检测方法标准改革的初步方案。     

GB/T 13448-2006彩色涂层钢板及钢带试验方法国家标准修订情况介绍

简要介绍了GB/T 13448-2006的修订原则和标准结构,重点介绍了标准的主要修改内容及新旧标准的差异,简述了新标准的特点及创新点.     

钢筋混凝土用热轧带肋钢筋新标准修订的主要内容

介绍了我国热轧钢筋标准体系及采用国际、国外先进标准情况,按条款介绍新修订的钢筋标准主要技术内容及特点。     

GB／T12773—2008《内燃机气阀用钢及合金棒材》标准综述

简单介绍了我国内燃机气阀用钢使用状况的快速发展、标准的沿革和修订背景,重点介绍了标准的主要技术指标的变化,对企业使用和执行标准有指导意义。     

企业技术标准战略及选择和实施

介绍了技术标准、技术标准战略的概念和内涵,阐述了标准战略之间的彼此联系、相互转化关系,介绍了马钢实施标准战略的选择和实施情况,指出了实施标准战略是打造企业核心竞争力的必然趋势。     

我国标准物质/标准样品发展综述

介绍了标准物质/标准样品的起源和发展,阐述了我国标准物质/标准样品的管理、现状及冶金标准物质/标准样品的研制方向。     

YB/T 2305—2007《焦化产品试验用玻璃温度计》标准述评

简单介绍了YB/T 2305—2007《焦化产品试验用玻璃温度计》标准的简要情况及现行焦化产品试验方法标准使用温度计的情况,重点介绍了标准修订的主要技术内容,对企业的使用和执行标准具有一定指导作用。     

ISO-14000系列标准介绍之一——标准的形成过程与特点

ISO 14000系列环境管理标准ISO(国际标准化组织)继ISO9000质量管理标准后的重大举措,是当今的国际潮流。为全面介绍该标准,并使之尽早在我公司实施和通过认证,我们组织有关人员编写了介绍该系列标准的系列文章。来文是该系列文章的第一篇,主要介绍了ISO 14000系列标准的形成过程;制定机构概况及其工作进展;以及该系列标准的特点和实施意义。     

冶金企业内控标准的制定与研究

阐述了内控标准的定义,提出了内控标准制定原则,介绍了制定内控标准的方法,探讨了内控标准的研究及实施。     

GB／T 25833-2010《公路护栏用镀锌钢丝绳》标准述评

简要介绍了GB／T25833-2010《公路护栏用镀锌钢丝绳》标准起草过程中的工作简况和制定原则,并重点介绍了该标准的主要技术内容及与相关标准的对比情况。     

Revising psychological tests: Lessons learned from the revision of the MMPI.

Some types of psychological tests become dated and require more frequent and more extensive revision than others. Because of the formidable effort that is required in a test revision, the goals and scope of the revision need to be carefully staked out before a revision is undertaken. The revision team needs to develop a generally agreed-upon guiding philosophy for the test revision in the beginning of the project and incorporate broad input into the changes that are likely to be required. Factors important to consider in a test revision are discussed, and the parameters of personality test revision illustrated from the extensive program to revise the Minnesota Multiphasic Personality Inventory (MMPI) are included. Recommendations for gauging acceptance of the revision are suggested along with steps that revisers and publishers might take to make a test revision both more research based and more acceptable to test users. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

GB/T 12754-2006彩色涂层钢板及钢带国家标准修订情况介绍

简要介绍了GB/T 12754-2006的修订原则,重点介绍了标准的主要修改内容及修改理由,对标准修订时涉及的有关事项做了说明.     

Sequence analysis of a 33.2 kb segment from the left arm of yeast chromosome XV reveals eight known genes and ten new open reading frames including homologues of ABC transporters, inositol phosphatases and human expressed sequence tags

This retrospective study was undertaken to determine the revision rate for dynamic sphincter pharyngoplasty (DSP) at the University of Michigan Medical Center to analyze the determinants contributing to the need for revision pharyngoplasties, and ultimately to improve primary pharyngoplasty to avoid the need for revision. The records of 30 children with repaired palatal clefts who presented with velopharyngeal insufficiency and hypernasal speech, and who underwent DSP from January 1988 through July 1994 were reviewed. Clinical follow-up ranged from 6 to 48 months (mean, 20.2 months). Seven of the original 30 patients (23%) had persistent, moderate-to-severe hypernasality that required reoperation, while 1 patient (3%) demonstrated hyponasality requiring revision. Seven of 8 patients who underwent revision pharyngoplasty had acceptable speech after revision. Dehiscences, low-lying pharyngoplasty flaps, and end-to-end suturing of the flaps were the main determinants resulting in the need for revision. In our study, female gender and older age was associated with a higher success of primary operation.     

GB/T 14164-1993石油天然气输送用热轧宽钢带国家标准修订

简要阐述了制管行业的现状及发展趋势。分析了国家标准GB/T 14164-1993修订的必要性、修订的原则以及修订中存在的难点,并提出了相应的解决措施,据此对标准作了科学、合理的修订。     

A review of 308 cases of revision stapedectomy

OBJECTIVE/HYPOTHESIS: Identify causes of primary and revision stapedectomy failure in 308 patients, assess whether these are different based on source of initial surgery, and evaluate hearing results in revision stapedectomy to improve outcome. Study Design: Retrospective, nonrandomized chart review of patients undergoing revision stapedectomy in a referral otology practice in a large metropolitan region. MATERIALS AND METHODS: Intraoperative findings, preoperative and postoperative revision stapedectomy air and bone conduction pure-tone averages, speech discrimination scores, postoperative air-bone gaps, complications, and repeated revisions were noted in 308 patients. RESULTS: Leading causes of primary stapedectomy failure included dislocated prosthesis (24.4%), inadequate prosthesis length (14%), long process resorption (14%), and fibrous adhesions (13.6%). Revision stapedectomy air-bone gaps were less than 10 dB in 80% and greater than 30 dB in 6.8% of cases. Increased sensorineural hearing loss occurred in 0.8% of revision stapedectomy cases. Five of seven cases of vertigo associated with primary stapedectomy resolved after revision surgery. CONCLUSION: Revision stapedectomy by experienced surgeons is highly effective in attaining successful air-bone gap closure in 80% and improved closure in 84.8% of operative cases. Risk of vertigo and/or sensorineural hearing loss was not any higher in this patient population when compared with reports of primary stapedectomy.     

线材制品类产品技术标准状况分析

概述我国线材制品类产品技术标准制修订、宣贯、监督、检查工作基本情况.重点指出标准体系设计、技术标准制修订工作存在的问题及其可供参考的改进措施.     

Frequency and causes of shunt revisions in different cerebrospinal fluid shunt types

Shunt complications and revisions are common in hydrocephalic patients treated with a ventriculo-atrial or a ventriculo-peritoneal shunt. The reported revision rate differs very much but the rate of revision is close to 50% in many papers. Data from 884 hydrocephalic patients treated with various shunt types in the period 1958-1989 were recorded retrospectively in order to evaluate the frequency of revision for various shunt types and secondly to analyse the specific reasons for the shunt revisions. The rate of shunt revision was 45%. The Pudenz shunt was revised more often (62%) than the remaining shunt types. The Hakim and the Orbis-Sigma shunts had fewer revisions (35% and 27%, respectively) than the other observed shunt types. A defect of or an obstruction in the ventricular catheters was a frequent cause of revision followed by a defect or an obstruction of the distal catheter, a displacement of the distal catheter and an acute infection. Because of the higher rate of revision for the Pudenz shunt the rate of the above mentioned specific complications is also higher in most of the subgroups for that specific shunt type. Driven by these experiences it is reasonable to seek to develop and introduce new shunt types in an attempt to reduce the complication rate.     

Predictive value of early radiographic findings in cementless total hip arthroplasty femoral components: an 8- to 12-year follow-up

Total hip replacement was performed in 119 patients (124 hips) with an uncemented Ortholoc femoral component between 1982 and 1987. Eight patients (9 hips) died, and 13 patients (15 hips) were lost to follow-up, leaving 98 patients (100 hips) followed for 8 to 12 years. Pain scores and anteroposterior and lateral radiographs of the femoral component from the 2-year follow-up visit were evaluated. Twenty-four of the 100 hips were revised for aseptic loosening. Radiographic criteria were highly effective in predicting those cases that would require revision. Radiolucent lines occurred at a higher frequency in all Gruen zones of the revision group radiographs, and the differences were statistically significant in zones 1, 7, 8, and 14 (P < .001). Proximal radiolucent lines were present in all of the revision cases and in 45% of the nonrevision cases. Radiolucent lines occurring on the lateral view alone were a statistically significant predictor of future need for revision (P < .001). Presence of radiolucent lines around the porous coating was 100% sensitive and 55% specific in predicting future revision. Absence of radiolucent lines around the porous coating was 100% sensitive and 45% specific in predicting no need for revision in the first 8 years.     

GB/T 20975—2008《铝及铝合金化学分析方法》国家标准修订情况介绍

简要介绍了GB／T20975—2008的修订原则和标准结构,重点介绍了标准的主要修订内容及修订依据。阐述了新标准的特点和创新点。     

GB／T13793—2008《直缝电钢管》国家标准综述

介绍了GB／T13793—2008《直缝电焊钢管》国家标准的修订原则、主要技术内容修改情况等。