燃气调压器的调试及安全措施

本文介绍了调压器的验收、调试方法和安全措施,以供从事燃气调压器的工作人员参考。     

家用液化石油气调压器质量监督抽查情况通报

本次共抽查38家单位经销的家用液化石油气调压器51批次,其中大、中型商场有6家。抽检家用液化石油气调压器14批次,合格3批次,合格率为21.42％;燃气具专营店6家,抽检6批次,合格2批次,合格率为28.57％;其它调压器经销店26家,抽检调压器28批次,合格1批次,合格率为     

强化监控力度 扩大测试覆盖面 杭州又一批劣质调压器被曝光

由于空调器的普遍使用和受低压电的困惑,部分家庭和单位的空调成了中看不中用的摆设,使得不少家庭纷纷决定购买调压器,以解燃眉之急。有关厂商抓住这一契机,纷纷推出各种不同规格型号的调压器产品、据不完全统计,今年进入杭城的调压器产品有近百个牌号。但     

电力设备高压试验中调压器的应用分析

电压是电能的重要质量指标,同时电力调压器也是当前电力系统中比较常用的电气设备,因此电压是否拥有较好的质量对于整个电网的稳定以及电力设备的安全运行而言,具有比较重要的作用。有效的使用调压器能够科学合理控制实验,从而不断提高实验的切实可行性。本文结合具体实际情况,详细的分析和论述了调压器在电力设备高压试验中,所应用的各个方面。     

浅析天然气转换后调压器的改造及运行管理

本文介绍了天然气转换后调压器改造的必要性、改造方法和运行管理重点。     

变压器新产品开发方向

<正> 我国变压器类包括变压器、互感器、电抗器、调压器四大类产品,以及为其配套的组部件。今后     

阀门自控装置在区域调压系统中的应用

随着管道煤气的迅速发展，煤气的安全使用及自动化问题已提到日程。目前我国大多数城市均采用中压——低压二级管网系统。通过调压站将中压变为低压输送到用户灶前。虽然每个调压站均配备了不同型号的安全放散阀，如水封式、弹簧式等，他们也均能在调压系统出口压力超过规定值时，自动打开闸门。将定量的燃气排人大气中。但是，有时由于调压器或指挥器薄膜破裂、阀口关闭不严、弹簧故障、中压停气又突然给气、高低辅助调压器失灵等多种原因也造成调压系统失控，使出口压力过高，而安全放散阀的泄压量又不够。因此事故时有发生。     

交流斩波调压器中PWM控制的FPGA实现

文章采用EDA技术,在QuartuslI软件开发平台中针对FPGA芯片实现交流斩波调压器的PWM控制.利用该方式产生的IGBT驱动信号稳定、可靠,实现方式灵活,且便于调整.     

要严格执行生产许可证制度 杜绝劣质调压品流入市场

家用液化石油气调压器是连接钢瓶和灶具的重要部件,是保证人们安全使用液化石油气及灶具正常燃烧的关键部件。它的进口侧与钢瓶相连,压力最高可达1.56MPa,出口侧通过软胶管与灶具连接,其压力很低,一般在2.75KPa左右。进出口两侧压差如此悬殊,再加上液化     

浅谈电压稳定性机理

随着电力事业发展迅速,电网内部也存在着引起电压崩溃的因素,而且可能更为突出,只是由于目前大多数有载调压器分接头未投入自动和电力部门过早地采用了甩负荷这一最后的措施,因而电压稳定问题似乎显得不那么突出。     

微弧氧化脉冲电源的研究

本文首先介绍了微弧氧化技术,结合微弧氧化技术的特点,对微弧氧化电源主电路的设计进行了详细的介绍,提出了微弧氧化电源的设计要求。通过晶闸管调压电路来调节输出电压大小,主电路采用调压电路和逆变电路结合的方式。     

普通房柱法采矿对矿柱稳定性分析

本文通过对锡矿山闪星锑业有限责任公司南矿的开采历史、现状及地压岩移活动分析,对该矿普通房柱法采矿矿柱稳定性进行了分析。     

Monopoly regulation without the Spence–Mirrlees assumption

The paper extends the Baron and Myerson [Baron, D., Myerson, R.B., 1982. Regulating a monopolist with unknown costs. Econometrica 50, 911–930] model of monopoly regulation to bidimensional adverse selection: both the marginal cost and the fixed cost of the monopoly are unknown to the regulator. Like in Araujo and Moreira [Araujo, A., Moreira, H., 2000. Adverse section problems without the Spence–Mirrlees condition. Fundação Getulio Vargas, Rio de Janeiro, Ensaios Economicos 389], the paper provides an explicit solution of a screening model without the Spence–Mirrlees assumption.     

Staffing effectiveness across countries: An institutional perspective

This study draws on institutional theory to investigate why and how staffing effectiveness varies across countries. Utilising data from multiple sources (Cranfield Network on Comparative Human Resource Management [CRANET], Global Leadership and Organisational Behaviour Effectiveness [GLOBE], World Economic Forum [WEF], Transparency International, Tightness-Looseness Index), it covers 2,918 organisations in 11 countries. Extending earlier research on comparative staffing that focuses on cultural or regulatory differences separately, our findings show that companies in different countries implement staffing practices in line with their normative (i.e., cultural), regulatory, and cognitive institutions. A second key finding shows that institutionally embedded staffing practices are associated with organisational turnover, thus challenging dominant universalist perspectives on staffing effectiveness. Finally, we shed light on a central yet understudied boundary condition of contextual perspectives on staffing by identifying the strength of institutional pressures (i.e., societal tightness-looseness) as a moderator of the relationships between national institutions, staffing, and turnover.     

比例操纵阀在汽车起重机中的应用

为满足中大吨位的汽车起重机大流量、高压力,既能实现自动比例控制,又能降低能耗的要求,湖南常德信诚液压有限公司设计了一种集负载反馈、压力补偿先导比例控制为一体的节能比例操纵阀。文章阐述了该阀的结构,进一步通过汽车起重机系统说明了其原理。该阀结构紧凑,功能齐全,可应用于25～65t起重机上替代进口阀,现已投入批量生产。     

GTCP85-129型APU故障研讨分析

GTCP85-129型APU(辅助动力装置)的常见故障包括APU超速、高滑油温度、低滑油压力或无法起动等,文章对其故障及原理进行了探讨。随着在翼使用时间的增加,该型APU部件性能衰退和失效的情况也会增多,可以结合系统原理和实际经验进行分析,加快故障排除过程,提高飞机保障效率。     

National versus supranational bank regulation: Gains and losses of joining a banking union

We ask how the structure of international banking affects the decision of a national regulator to join a banking union and to transfer regulatory powers to the supranational level. The focus is on bank supervision and bank resolution. A national regulator ignores possible gains or losses, which accrue to other jurisdictions if banks are internationally active. A supranational regulator takes these regulatory external effects into account. While supranational regulation improves total welfare, this is not necessarily the case for welfare in single countries. By analyzing the size and determinants of spillover effects we show how they constrain a country’s willingness to participate in a banking union. Our results may explain why some member states of the European Union currently hesitate to join the European Banking Union.     

基于低碳理念的重载沥青路面轮胎初压工艺

现阶段,低碳环保备受关注,人们对于资源浪费和环境污染所带来的要以沥青路面施工中引入低碳理念进行探究,对重载沥青路面施工碾压工艺进行了深入分析,从而使道路建设迈向新的发展阶段.而道路质量良好与道路碾压技术的性能有直接关系,经过多年的实践经验,采用新型的轮胎初压道路施工碾压工艺,秉承"节约、减少废碳的排放",以全面提升道路...     

International Expansion,Diversification and Regulated Firm Nonmarket Strategy

Previous studies have shown that regulated firms diversify for reasons that are different than for unregulated firms. We explore some of these differences by providing a theoretical model that starts by considering the firm–regulator relationship as an incomplete information issue, in which a regulated incumbent has knowledge that the regulator does not have, but the firm cannot convey hard information about this knowledge. The incumbent faces both market and nonmarket competition from a new entrant. In that context, we show that when the firm faces tough nonmarket competition domestically, going abroad can create a mechanism that makes information transmission to the regulator more credible. International expansion can thus be a way to solve domestic nonmarket issues in addition to being a catalyst for growth. Copyright © 2012 John Wiley & Sons, Ltd.     

Information, Control, and Organizational Structure

This paper investigates how a designer of an organization (referred to as the regulator) should organize a production activity in which two different units produce components and where each unit has private information about its costs. Three organizational structures are analyzed. In the first (informational consolidation), the regulator contracts with a consolidated unit that produces both components. In the second (informational decentralization), the regulator independently contracts with the producer of each component. In the third (informational delegation), the regulator contracts with one of the units, which in turn subcontracts with the other. In each case, the regulator's optimal mechanism consisting of payment and output schedules is fully characterized. Informational consolidation and informational decentralization yield different output schedules. Under informational decentralization, the optimal output schedule may not depend on the sum of the marginal costs of each component, but when it does, the regulator strictly prefers informational consolidation to informational decentralization. Informational delegation is shown to be equivalent to informational decentralization when the regulator can observe the contracting between the units.