经济型数控车床调试故障剖析

经济型数控车床的调试是优化整机性能的必要工序,在数控车床工作中,电网电压不良会不同程度干扰数控系统;使步进电动机、驱动系统的可靠性差;电动刀架受到电源相系的制约;变频器会干扰计算机、驱动系统的正常工作.所以,必须解决来自各个方面的问题,才能使整机工作在最佳技术状态.     

Assessing adult adjustment to relationship separation: The Psychological Adjustment to Separation Test (PAST).

Relationship separation is associated with substantial adult adjustment problems. The Psychological Adjustment to Separation Test (PAST) was developed as a self-report measure of 3 key dimensions of separation adjustment problems: lonely negativity, ex-partner attachment and coparenting conflict. Two independent samples (n = 219 and n = 169, respectively) of recently separated adults, 60% of whom had children, completed the PAST and other measures of general adjustment. Exploratory and confirmatory factor analyses demonstrated a replicable 3-factor structure, with each factor showing satisfactory test-retest and internal reliability and good convergent and discriminant validity. The PAST meets initial criteria for a potentially useful new measure of adult separation adjustment. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

油藏数值模拟法预测剩余油分布及调整挖潜措施--以临南油田夏32块油藏为例

以临南油田夏32块油藏为例，叙述了边水活跃油藏中高含水期油田调整模式。在精细油藏描述的基础上，利用油藏数值模拟技术研究剩余油分布规律是较为直观的好方法。通过对开发动态进行历史拟合，分析了剩余油的分布特征及其控制因素，针对不同的剩余油分布形式，提出控水稳油的挖潜调整措施。     

分光计的调节难点、调节方法及其迁移应用

作为一种精密的光学测量仪器,分光计的调节难点是如何调整分光计的中心轴和望远镜的光轴垂直。利用自准直原理,将平行光管狭缝的透射像作为辅助标志物,各半调节、逐次逼近,就可以又快又准地达到调节要求。分光计在结构上与诸多光学仪器有相似之处,掌握其调节方法可以为今后使用精密光学仪器打下基础。     

双燃料汽车ECU控制参数在线调试技术开发

介绍了一种自行开发的双燃料汽车ECU控制参数调试系统。建立了电子控制单元与PC机之间的数据通信硬件系统。修改后的控制参数被存放在控制单元的EEPROM中。在PC机上用VB开发了调试程序。本系统在硬件和软件两个方面采取了措施，以保证通信准确、顺利地进行。模拟试验结果表明，其工作稳定、可靠，能满足在线调试的需要。将该调试程序移植至笔记本电脑中，可实现控制参数的随车在线调试。     

伺服运动系统控制参数在线调节算法研究

针对传统伺服运动系统跟踪性能容易受到外界干扰、速度变化、非线性等因素影响的缺陷,提出根据速度变化实时切换控制参数的在线调节算法,并基于PMAC控制器实现其算法,通过实验证明了算法对改善伺服运动系统跟踪性能的有效性。     

浅议国产变频器的选用与操作注意要点

本文作者结合在从事外委实践中,包括合康牌等变频器维护工作和安装使用的选用体会,简要介绍了选用合康牌等变频器的基本经验,分析了目前国内变频器市场进口设备与国产设备的异同,并根据在变频器操作中发生的几例问题进行剖析,指出了具体操作的注意事项。     

Modeling for Width Adjustment in Alluvial Rivers

The width adjustment models in current use for application to alluvial rivers are based on the extremal hypotheses. In these models, the increase in slope required to sustain higher-sediment concentration is provided by aggradation of the river bed. An alternative approach was presented by the writer (Chitale 2001) which showed that on a long-term basis, the increase in slope required for higher-sediment concentration is accompanied by a reduction of the meander sinuosity associated with a bigger width-to-depth ratio. In width adjustment, aggradation is thus a transient phenomenon of temporary duration until the final stable width is achieved. The physical sequence of the adjustment process according to this hypothesis is presented and supporting evidence is given. It is also concluded that the predictive models for stable width on a long-term basis need necessarily to include the meander sinuosity as an essential parameter.     

对焊法兰优化设计浅探

本文介绍了在一定设计条件下,对焊法兰的优化方法,并对这些方法作出了分析和评估,借助于满应力优化设计方法思路,基于大量对焊法兰设计经验,作者提出了一种方便而又规范的对焊法兰优化设计方法——按比例调整优化设计法。同时,较为详尽地介绍了这一方法的应用,并提供了这一方法与满应力优化设计法相比较的计算结果。     

热水供暖系统试运行调试

文章论述了热水供暖系统的充水、启动程序及调试方法。