CIMS中多应用系统间的数据关系及集成方法

PDM、MRPII\CAX系统是CIMS工程中常见的应用系统 ,不同系统间数据的共享是实现CIMS集成的基本问题。各系统间的数据主要包括物料清单、工艺信息及设计制造信息等 ,其中信息编码是保证数据完整性、一致性、共享性、无冗余的重要手段。通过介绍基于STEP、CORBA及COM /DCOM的集成方式 ,指出基于目前国产化软件情况 ,采用接口集成的方式是合适的     

船舶维修级别分析程序的设计与实现

为实现船舶维修决策和管理自动化,将经济性分析与非经济性分析相结合,以综合成本最低为原则确定船舶故障设备的最佳维修级别方案,运用计算机技术和统计决策方法研发船舶维修级别分析系统.系统试运行实现了船舶设备维修级别的自动化决策,表明采用的理论方法具有可行性.     

超声萃取-气相色谱-质谱联用法测定船舶用材料中6种多氯化萘

多氯化萘(PCNs)是船舶有害物质清单中的必测项目,目前并没有统一的检测标准,因此建立一种适用于船舶用材料中多氯化萘的方法十分有必要。选取船舶用材料,以丙酮-正己烷混合溶液为萃取溶剂,超声萃取1 h,过滤后,采用Agilent&HP-5MS(30 m×0.25 mm×0.25μm)毛细管柱进行分离,四极杆质谱检测器分析检测,实现了气相色谱-质谱联用法(GC-MS)对样品中6种多氯化萘的测定。方法的线性范围为10～100μg/L,校准曲线的相关系数均大于0.998,检出限在14.0～40.6μg/kg之间,定量限在46.8～135.3μg/kg之间。分别在PCNs含量低于检出限的船舶用材料中加入200、500、900μg/kg共3个含量水平的PCNs,结果表明,6种PCNs的加标回收率为99%～109%,相对标准偏差(RSD,n=6)为0.29%～4.2%。按照实验方法和已有文献中的方法分别对3种船舶用材料(电容器、电缆、润滑油)中6种PCNs进行分析,加标含量为500μg/kg,方法的回收率为98%～105%,相对标准偏差(n=6)为1.7%～3.8%。     

基于多相整流的船舶电力推进系统谐波抑制

变频器等电力电子设备在船舶电网中的使用,将使变频器输入回路产生大量谐波.为减小谐波对电网的污染,对6脉波、12脉波、24脉波整流器的输入侧电流谐波进行了分析,对船舶电力推进系统不同工况下的网侧电流谐波进行了仿真研究.仿真结果表明,多相整流技术是抑制谐波的有效方法,整流相数越多,变频器注入电网的谐波含量越小;24脉波整流应用在船舶推进系统上可大大减小船舶电网的谐波含量,有效地提高电网品质.     

基于软件构件技术的冶金工业过程控制系统

在冶金行业过程控制系统(PCS)的L2计算机过程控制应用系统的设计和开发中,考虑了软件复用的构件技术,以构造新的软件应用系统.通过对宝钢分公司炼钢区域(转炉、精炼和连铸等工序)L2计算机应用系统的功能需求分析和领域分析,归纳共通的功能需求特点,建立了炼钢领域数据模型和炼钢领域子系统模型,创建构件.构件的设计过程中考虑固定体部分,即满足炼钢领域中各工序需求具有公共性的设计.通过领域分析和领域模型的建立,考虑某构件与其他构件的关系及构件内部的实现.对于变化体的设计采用"配置"的方法.     

蒙特卡洛法在多点校准线性测量系统不确定度评定中的应用

多点校准线性测量系统相比单点或两点校准具有更宽的测定范围和更高的准确度、可靠性,在化学分析、物理测试等多个领域都有着广泛的应用。实验提出了蒙特卡洛法(MCM)评定多点校准线性测量系统不确定度的数学模型和仿真模拟方法,并以电感耦合等离子体原子发射光谱法(ICP-AES)测量低合金钢中锰含量为例,介绍了MCM评定测量不确定度的详细步骤和应用方法。首先采用MCM法,根据输入量的概率分布类型,通过模拟抽样分析进行测量不确定度评定,再采用GUM法进行评定。实验结果显示,试样中锰含量的平均测量结果为(0.919±0.012)%,k=1.96,与GUM法计算得到的扩展不确定度一致。给出的方法实现了MCM法在多点校准线性测量系统不确定度评估中的应用,一定程度上解决了标准样品参考值与线性校准波动性引入不确定度量值的导入问题,有助于进一步推动不确定度评估与应用的创新与发展。     

钢铁企业信息化建设中EMS的定位与应用

分析了钢铁企业信息化的主要架构以及能源管控系统在其中的关键作用,阐述了能源管控系统与企业其他信息系统之间信息集成的必要性,并介绍了能源管控系统在信息集成方面的重点应用,为企业推进能源管控建设提供了有益参考。     

基于支持向量机和随机森林算法结合光纤式激光诱导击穿光谱定量检测核电用钢中铬

核电站关键设备的状态检测技术是核电安全性和经济性的重要保障,激光诱导击穿光谱技术(Laser-induced breakdown spectroscopy,LIBS)是一种可在线测量材料元素组分及其结构状态的新方法,基于采用光纤传输激光并回传等离子体辐射的光纤式激光诱导击穿光谱(fiber-optic LIBS,FO-...     

用ISOC型试样测试Ti(C,N)基金属陶瓷抗弯强度的不确定度评定

Ti(C,N)基金属陶瓷属于硬脆性材料,在实验研究及生产实践中一般用三点抗弯强度来表征其强度。由于金属陶瓷比WC基硬质合金脆性更大,在实际制样过程中,磨削加工容易导致试样开裂并出现边角崩缺,难以制备出符合要求的方条试样,其可能存在的显微崩缺及微裂纹会导致测试结果失真,散差增大。本文采用更容易制备的圆棒状试样测试抗弯强度(TRS),并对其测试结果的不确定度进行评定。结果表明:采用ISO C型试样测试金属陶瓷的抗弯强度的相对扩展不确定度小于5%。     

基于改进模糊SVM的转子振动故障诊断技术

首先对常用的隶属度确定方法进行改进,提出了基于改进模糊支持向量机(FSVM)的融合故障诊断方法,并建立了改进FSVM故障诊断数学模型;然后,利用转子振动模拟实验台对四种典型的转子诊断故障进行模拟,并提取其故障信号特征;最后,通过实例计算分析,验证了该方法在转子振动故障诊断方面是可行的和有效的.     

船舶领域研究综述

通过对现有船舶领域模型进行分类综述和分析,总结基于各类研究方法的主要研究成果及其主要特点,剖析其存在的主要问题,阐明船舶领域研究的核心思想和意义,明确提出船舶领域研究的几个具有理论和实际意义的可能的研究方向.     

Changes in women's health care aboard one ship

Health care needs of women assigned to sea duty may change over time. OBJECTIVE: Determine changes in the obstetrical/gynecological needs of U.S. Navy women assigned to a submarine tender. METHODS: Retrospective record review of personnel aboard one U.S. Navy ship in 1990 and in 1995. RESULTS: The demographic character of the female crew members changed. Compared with 1990, the women in 1995 were older, more experienced, of higher rank, more likely to use contraception, and more likely to have children. The pregnancy rate dropped from 2.7 to 1.5 per 100 women per month. Sexually transmitted diseases were less frequent, and the "satisfactory Papanicolaou smear" rate increased from 52 to 93%. Both in 1990 and 1995, women utilized Sick Call more often than men. CONCLUSION: Measurable changes occurred in the obstetrical/gynecological health care needs of women assigned to one ship in 1990 and 1995.     

Rapid conversion from one monoamine oxidase inhibitor to another

BACKGROUND: Numerous sources state that switching from one monoamine oxidase (MAO) inhibitor to another can be done only after a 14-day washout period. In hospitalized patients and severely depressed outpatients, such a wait may be impracticable. METHOD: We reviewed the case histories of eight consecutive and random patients whom we converted from one MAO inhibitor to another within less than the recommended waiting period. RESULTS: Only one patient experienced troubling adverse effects, and these effects were brief and time-limited. The patient's symptoms were indicative of either withdrawal from tranylcypromine or a mild serotonin syndrome. All other patients tolerated the conversion well with minimal or no adverse effects. Four of the eight patients eventually responded to the new MAO inhibitor. CONCLUSION: These results suggest that some patients can be cautiously but rapidly switched from one MAO inhibitor to another without prolonged drug-free periods. Unquestionably, this strategy should be used only when the clinical picture mandates a rapid conversion. Further, it should be reserved for those patients with established high compliance and should include close monitoring and the use of a low-tyramine diet. Extreme caution must still be undertaken in utilizing this approach until larger studies more accurately determine the frequency of serious adverse effects.     

Psychotherapy: From one state of illusion to another?

Uses the speculations of K. Primbram (1971) and D. Bohm (1973) regarding the holographic nature of human brain processes and the existence of an implicate order of reality, in which everything is enfolded, as metaphors for suggesting that Western psychotherapy may have overlooked contact with an ultimate order of reality. Eastern and esoteric traditions of self-knowledge (meditation, observation, story telling) are offered as established pathways toward such a goal in the search for personal meaning. The value of conventional psychotherapy is not denied, especially in crisis intervention, but long-term successful therapy requires an approach to fundamental issues such as the client's world view. It is suggested that a skilled and successful therapist can become quite mechanical through the repeated use of one brand of therapy. It is concluded that the growth of personal consciousness should become the focal point for both client and therapist in the psychotherapeutic process. (37 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Probability of the superior outcome of one treatment over another.

An intuitively appealing indicator of magnitude of effect in applied research is an estimate of the probability of the superior outcome of one treatment over another. Parametric and nonparametric estimates are discussed, as is a meta-analytic estimate. Estimates from values of t, the point-biserial correlation, and standardized effect size are presented. A new perspective on J. Cohen's ( 1988) standards for small, medium, and large effect sizes is provided. Psychologists who are conducting applied primary research or meta-analyses are urged to include such estimation in their reports. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Do we know how much people like one another?

Metaperception is a person's perception about a second person's perception of a third person. The purpose of this article is to examine the accuracy of metaperceptions of liking. A related question concerns whether the heuristics of balance, reciprocity, and agreement are used by perceivers when forming such judgments. The authors present analyses from 5 diverse research studies that used an adaptation of the social relations model for triads (C.E. Bond et al, in press). The results indicate that people know how much people like one another, even with small amounts of information. Although there is evidence for the use of heuristics, particularly reciprocity and agreement, accuracy is sometimes enhanced by using these heuristics. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Learning socially to eat more of one food than of another.

Young observer rats (Rattus norvegicus) that interacted with a conspecific demonstrator fed a diet with more cinnamon than cocoa subsequently preferred cinnamon-flavored diet to cocoa-flavored diet, whereas observer rats that interacted with a demonstrator fed a diet with more cocoa than cinnamon preferred cocoa-flavored diet to cinnamon-flavored diet. The tendency to eat more of a food when it is a major constituent, rather than a minor one, of the diet of a conspecific may be particularly useful to weaning rats as they learn to compose a nutritionally balanced diet by eating appropriate relative amounts of several different foods. (PsycINFO Database Record (c) 2010 APA, all rights reserved)