室外架空工业水管道支架设计

室外架空工业水管道支架设计既要使工业水管道走向满足企业各用水户的使用要求,还要保证与建(构)筑物及埋地管道最小平面净距要求,且受力合理,经济适用,保证管道的安全使用。对室外架空工业水管道支架平面与立面设计、管道支架的间距、固定支架的设置进行分析和探讨,并对固定支架的管道水平推力进行举例计算。     

对管道支架的再认识

在对传统管道支架认识的基础上提出了新的支架形式－拉杆支架，新的基础形式－板式独立基础、板柱梁土基础。     

管道支架的设计

通过某工程管道支架的设计,介绍了管道支架的设计原则、计算方法及注意事项.     

浅谈钢筋砼管道支架和电缆桥支架的选型

结合两个工程实例介绍了钢筋砼管道支架和电缆桥支架选型时应考虑的问题。     

大型柔性伸缩节

柔性伸缩节用以解决高温作业的各种设备及管道热膨胀的问题。随着大型冶金设备的发展、设备与管道、管道与管道之间,广泛使用伸缩节,并逐渐向大型化方向发展。现以宝钢450m~2烧结机为例,对大型柔性伸缩节的结构及消化移植等问题作一介绍。 1.大型柔性伸缩节的特点 1)能调节热膨胀过程中复杂的变位要求,可调节任何方向的热膨胀位移; 2)耐热性能好,由于伸缩节主要采用石棉与不锈钢丝交织的织物,可在介质温度250℃～500℃的条件下使用; 3)体积小重量轻;     

管道柔性设计对合成气压缩机汽轮机振动的影响

空气压缩机的汽轮机在运行过程中出现异常,大多情况下表现形式为轴的不正常振动。本文以某大型化肥厂的合成压缩机汽轮机在试车中发生振动异常情况为例,经过受力分析以及汽轮机允许受力校核,通过研究,我们发现计算机出现异常振动主要是由于在蒸汽管道入口位置拉动钢铁导致的。为能够实现柔性设计进而使蒸汽管道产生的作用力与力矩较大,不符合设计规范要求而引起异常振动,工作人员和有关专家进行管道分段分析,将活动支架经优化后改为固定支架,并进一步改变支架位置,使用限位支架等措施进一步降低,由于蒸汽管道膨胀导致的作用力和力矩对汽轮机产生的不利影响,消除产生的异常振动,经过实验检测能够为汽轮机异常振动故障提供重要的参考。     

无推力补偿器在热力管道上的应用

介绍了无推力补偿器的工作原理 ,分析了在运用该补偿器的管网系统中固定支架的受力 ,提出了管道固定支架设计的新思路     

工业蒸汽管道断裂原因分析

一条蒸汽管道在运行过程中突然发生断裂,化学成分及力学性能分析证明管道材质良好。然而,金相和断口分析表明管道与固定支架的焊接接头存在缺陷,而该接头部位恰好是应力集中较严重的区域。进一步的力学分析解释了焊接接头处存在高峰值应力的原因,并表明管道壁厚太薄以至于不能承受恶劣的应力状况。另外,对出现汽锤或水击的可能性以及可能带来的影响进行了探讨。在综合以上分析的基础上,给出如下结论:断裂源头位于蒸汽管道与某固定支架的焊接接头处,裂纹源的扩展导致了整根管道的断裂,裂纹扩展的原因包括焊接质量不佳、管道设计壁厚过小以及接头结构设计不合理等。     

退火工艺对LED支架用冷轧带钢组织及性能的影响

对LED支架用冷轧带钢采用不同退火工艺及退火后的组织与性能进行研究分析。结果表明:带钢在罩式炉中620℃保温10小时退火,其回复再结晶效果较好,可获得符合要求的具有优异强度和塑性的带钢;保证了LED支架用冷轧带钢产业化的成功。     

无推力补偿器在热力管道上的应用

介绍了无推力补偿器的工作原理，分析了在运用该补偿器的管网系统中固定支架的受力，提出了管道固定支架设计的新思路。     

The enigma of social support and occupational stress: Source congruence and gender role effects.

Research on the potential ameliorating effects of social support on occupational stress produces weak, inconsistent, and even contradictory results. This study of 117 employees, mostly from a southern U.S. hospital supply company, examined potential moderators that were theorized might reduce the confusion: source congruence (congruence between sources of the stressor and of social support) and gender role. Congruence between the sources of stressors and of social support appeared to make little difference in determining the moderating or buffering effect of social support on the relationship between stressors and strain. Gender role, however, may moderate the relationship between social support and individual strains such that more feminine people react more strongly and positively to social support than more masculine people do. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Exploring age differences in the stress-buffering function of social support.

The purpose of this study is to see if there are age differences in the relationship between chronic financial strain, emotional support, and life satisfaction among people aged 65 and older. Data from a nationwide survey of older people (N = 1,518) indicate that emotional support tends to reduce the noxious effects of economic problems on life satisfaction for the sample as a whole. However, the findings further reveal that the potential benefits of emotional support arise primarily among the oldest-old. In contrast, emotional support does not offset the negative effects of financial strain on life satisfaction among the young-old. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

钢轨铝热焊技术和钢轨弹力紧固装置在马钢行车大车钢轨上的联合应用

采用钢轨弹力紧固装置和钢轨铝热焊技术，减少钢轨接头，克服钢轨热胀冷缩带来的弊端，使得行车在钢轨上运行平稳可靠。     

Changing network support for drinking: Initial findings from the Network Support Project.

The aim of this study was to determine whether a socially focused treatment can effect change in the patient's social network from one that reinforces drinking to one that reinforces sobriety. Alcohol dependent men and women (N = 210) recruited from the community were randomly assigned to 1 of 3 outpatient treatment conditions: network support (NS), network support + contingency management (NS + CM), or case management (CaseM; a control condition). Analysis of drinking rates for 186 participants at 15 months indicated a significant interaction effect of Treatment × Time, with both NS conditions yielding better outcomes than the CaseM condition. Analyses of social network variables at posttreatment indicated that the NS conditions did not reduce social support for drinking relative to the CaseM condition but did increase behavioral and attitudinal support for abstinence as well as Alcoholics Anonymous (AA) involvement. Both the NS variables and AA involvement variables were significantly correlated with drinking outcomes. These findings indicate that drinkers' social networks can be changed by a treatment that is specifically designed to do so, and that these changes contribute to improved drinking outcomes. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Dissonance reduction in the context of group membership: The role of metaconsistency.

Recent work has established that groups can reduce dissonance by providing consonant cognitions, normative support, or an opportunity to diffuse responsibility for counterattitudinal behavior. Adopting a social identity framework, the current research comprised 2 studies examining metaconsistency, which was proposed to underlie these disparate explanations for the effect of social support. In Study 1 (N = 121), participants performed a counterattitudinal behavior with or without attitude and behavior support. As expected, congruence between the participants’ attitude–behavior consistency and another’s attitude–behavior consistency reduced attitude change. Study 2 (N = 69) replicated the results of Study 1; in addition, metaconsistency influenced participants’ perceptions of their own attitude–behavior consistency. The implications of metaconsistency for other contemporary perspectives of dissonance theory are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Optimizing Data Collection Path in Sensor Networks with Mobile Elements

Exploiting mobile elements (MEs) to accomplish data collection in wireless sensor networks (WSNs) can improve the energy efficiency of sensor nodes, and prolong network lifetime.However, it will lead to large data collection latency for the network,which is unacceptable for data-critical applications.In this paper, we addrcss this problem by minimizing the traveling length of MEs.Our methods mainly consist of two steps: we first construct a virtual grid network and select the minimal stop point set (SPS) from it;then, we make optimal scheduling for thc MEs based on the SPS in order to minimize their traveling length.Different implementations of genetic algorithm (GA) are used to solve the problem.Our mcthods are evaluated by extensive simulations.The results show that these methods can greatly reduce the traveling length of MEs, and decrease the data collection latency.     

柔性金属网在锚喷支护中的应用研究

分析研究了锚喷支护在大变形巷道应用中存在的诸多问题．并针对这些问题，提出采用柔性金属网改善喷层的柔性，提高喷层的韧性与抗裂能力，并对金属网材料和结构进行了实验室研究和理论分析。     

U型钢支架与木棚联合支护工艺在焦家金矿的应用

针对焦家金矿原有支护方式存在的安全隐患及成本较高的问题,采用新型U型钢支架与木棚联合支护工艺,并在-230 m中段71108采场进行了验证分析。结果表明,U型钢支架与木棚联合支护在力学方面具有优势,其稳固程度远高于木棚支护,该支护方法降低了采场的危险性,使顶板相对稳固,提高了作业人员凿岩的安全系数,对于采场顶层回采（顶板为不稳固充填体）以及较破碎围岩的巷道开拓、进路回采施工作业都有着不可替代的作用。同时,该工艺节约了木材消耗,其U型钢可以重复利用,创造了较好的经济效益。     

Recognizing Impossible Object Relations: Intuitions About Support in Chimpanzees (Pan troglodytes).

Using looking-time measures, the authors examined untrained chimpanzees' (Pan troglodytes) ability to distinguish between adequate and inadequate support. In 3 experiments, the chimpanzees' sensitivity to different support relations between 2 objects was assessed. In each experiment, the chimpanzees saw a possible and an impossible test event, presented as digital video clips. Looking times in the 3 experiments suggest that chimpanzees use amount of contact between 2 objects, but not type of contact, to distinguish between adequate and inadequate support relations. These results indicate that chimpanzees have some intuition about support phenomena but their sensitivity to relational object properties may differ from that of human infants (Homo sapiens) in this domain. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Multidimensional, threshold effects of social support in firefighters: Is more support invariably better?

This study examined the relationship between social support (Social Provisions Scale) and stress (Perceived Stress Scale) in a sample of male firefighters in a midwestern community (N=53). The authors assessed 5 types of perceived support from 2 sources: peer firefighters and supervisors. Results indicate that reassurance of worth and social integration support from supervisors had the strongest negative association with stress. The study critically examined the "unidirectional linear" assumption that a unit increase in support corresponds to a unit increase in adjustment throughout the full range of support scores. Reassurance of worth support from peers exhibited a curvilinear pattern of threshold effects. For individuals with the lowest levels of support, there was a strong negative association between perceived support and stress, but for firefighters above the median, the association was not significant. (PsycINFO Database Record (c) 2010 APA, all rights reserved)