从墨辩看逻辑的理论和应用

分析从墨子应用逻辑、对象逻辑，到墨辩元逻辑，再到诸子百家逻辑应用的飞跃，说明中国古代逻辑从应用到理论，再到应用辩证运动的动因、过程和脉络，从墨辩的产生、发展过程，探索逻辑理论和应用相辅相成、相互促进的机理，寻求现代逻辑理论和应用的历史借鉴。     

CRM数据挖掘中关联规则的应用

客户关系管理是数据挖掘重要的应用领域，包括客户获取、客户保持、客户价值提升的客户关系管理的各个方面，目前，面向客户关系管理的数据挖掘应用研究涉及应用功能、应用方法、算法、模型、数据处理、系统设计和开发等方面，阐述了数据挖掘在客户关系管理中的应用，通过对关联规则的具体分析，进一步明确数据挖掘在企业经营管理中的重要性。     

三塘湖盆地牛圈湖油田有效储层划分方法

为了满足牛圈湖油田J2X组油藏注水开发的需求，引入微电极测井方法，以此提高储层测井解释精细化程度。本文从微电极测井的适用条件、应用范围等方面，分析了微电极测井在牛圈湖油田的应用效果。同时，利用常规组合测井、核磁共振、阵列感应等测井资料，建立了几种有效储层测井识别方法，在实际应用中见到了较好的应用效果。     

高职教育中技能培养的思考

本从技术、技能、能力入手分析应用能力培养的重要性，技能训练和应用能力培养是两个不同的概念，哽 不能以技能考核的级别高低来衡量应用能力的强弱，应用能力的培养是一个长期缓慢的过程，需要贯穿于整个教学过程，尤其是实践环节。     

基于工作流系统的企业级应用架构研究

企业级应用有持久化、数据量大、用户多和业务逻辑复杂等特点，这就需要企业级应用开发在一个稳定、开放和易扩展的架构上进行。针对企业级应用的这些特点，提出了一个基于工作流系统的企业级应用架构，以适应企业管理信息化的需要。     

互锁式电子开关的设计与应用

介绍了互锁式电子开关的工作原理、应用举例、特点及应用前景。使用证明，该互锁式电子开关的结构设计合理、逻辑可靠、实用，应用前景广阔。     

HCR工艺原理及其在工业废水处理方面应用与展望

介绍HCR工艺的原理、特点、及其在不同工业废水处理中的应用，指出HCR工艺是一种具有高效率的、占地面积少的活性污泥工艺，具有广阔的应用前景，应加大对其研究及应用。     

浅谈高工专应用写作课教学

０ 前言 随着信息社会的到来，各类应用文体已经成为信息积累、传播的重要载体和手段。所以，近几年，各高等院校普遍把“应用写作”作为一门必要课程，纳入教学计划。工程专科学校作为专门培养工业、工程生产第一线的高等技术应用型人才的学校，必须把学生应用能力的培养作为工程专科教学和改革的主线。所以开设应用写作课也是高工专院校紧跟时代形势、培养高素质人才的必然要求。 然而，近几年有些高工专学校开设应用写作课的现状并不十分理想。只有部分专业开设了此课，而且是选修课，学时数还不到３０学时，选修的学生也不是很多。针对…     

Packeteer应用流最管理系列产品

全球领先的应用流量管理系统供应商美国百科迪（Packeteer）公司凭借卓越的智能应用流量管理专利技术，开发出一系列提高跨越广域网的商务应用效率的产品，能够通过对应用流量的可视化、可控制、可压缩及可管理的综合性解决方案，在降低IT成本的同时，大幅提高客户的生产能力。     

基于数据库的复制技术与应用

基于数据库的复制技术结构简单、机制实用可靠、性能高。介绍了数据库复制技术的原理及特点以及数据库复制的类型和应用情况分析。结合SQL Server 2000实际工程实例，对于复制技术在管理信息系统、热电厂监测、资讯数据服务等行业中的应用进行了理论和实践上的探讨，并给出了实施具体应用时的规划与实施方法。由于应用背景具有很强的代表性，因此对中小型企业集团实施和应用信息集成技术，具有一定的指导意义。     

EFFECTS OF In_2O_3 DOPING AND SINTERING TEMPERATURE ON THE ELECTRICAL PROPERTIES OF ZnO VARISTORS

ZnOvaristorshaveexcellentnon--linearcurrent--voltage(IV)characteristicsandenergyabsorptionability,makingthemvaluableasvoltagesuppressersinpowersystemsandelectroniccircuitsLlj.Thecurrentvoltagedependenceofvaristorsisdescribedbytherelation:I=C(V)"whereIisthecurrentdensity,Caconstant,Vthevoltage,andathecoefficientofnon--linearity.ThestudyresultsshowthatpureZnOgrainhasnottheelectricalconductivity.Intheprocessofitspreparation,thedefectisproducedinthegrain,andmakeitann--typesemiconductor.Thecer…     

压敏陶瓷研究的最新发展

根据本研究组在压敏陶瓷材料方面的研究成果,结合有关文献报道,对国内外压敏材料研究的最新发展状况作了简述,指出随着科学技术的飞速发展,各种压敏材料和压敏元器件的研发都取得了很大进展.近年来国外ZnO压敏材料的新发展和新应用以及新型SnO2压敏材料的显著进展,应引起国内业界的关注.     

ZnO环形压敏电阻器消噪特性研究及其敏感电压的控制方法

摘要：ZnO环形压敏电阻器广泛应用于消除录音机的噪声. 理论分析表明,在消除大能量噪声方面,突变型压敏电阻器优于缓变型;在消除小能量噪声时,缓变型效果更佳. 本文给出了压敏电压的具体控制方法,对普遍存在的焊后(压)降增大问题提出了解决方案. 实验结果表明,理论分析正确,控制方法简便、有效.     

Effects of In2O3 doping and sintering temperature on the electrical properties of ZnO varistors

ZnO varistors are prepared using the 0.1–0.3 mm ZnO powders. The effects of the sintering temperature, contents of In₂O₃ doping on the non-linear properties of ZnO varistors have been investigated. The results show that this kind of ZnO powder has a high sintering activity. It is suitable for making the low voltage varistors. The V _c decreases with the increase of sintered temperature, when the In₂O₃ content is fixed (0.98%, mass fraction), and increases with the increase of In₂O₃ contents when the temperature is steady. Project supported by the Nonferrous Metals Industry Corporation of China Synopsis of the first anthor Zhao Ruirong, born in Jan. 1935, majoring in nonferrous metal metallurgy and products exploition.     

Effect of SiO_2 addition on the microstructure and electrical properties of ZnO-based varistors

The microstructure and electrical properties of ZnO-based varistors with the SiO 2 content in the range of 0-1.00mol% were prepared by a solid reaction route.The varistors were characterized by scanning electron microscopy,X-ray diffraction,energy-dispersive X-ray spectrometry,inductively coupled plasma-atomic emission spectrometry,and X-ray photoelectron spectroscopy.The results indicate that the average grain size of ZnO decreases with the SiO 2 content increasing.A new second phase (Zn 2 SiO 4) and a gla...     

DEGRADATION DUE TO ENERGY PULSE IN HIGH-ENERGY ZnO VARISTORS

ZnOvaristorshavebeenextensivelyappliedtoelectronicandelectricsystemsasenergysurgeabsorbersincetheywereinventedin196811--4j.Ithasbeenacommerciallysuccessfultechnologytousehigh--energyZnOvaristorsforde--e-citationandovervoltageprotectionofhydroelectricgenerator.Whenappliedinthisway,thevaristorshavetobesubjecttoacontinuouselectricstressandtoadiscontinuousenergypulse,whichcauseastaticdegradationandadynamicdegradationinthehighenergyZnOvaristors,respectively['--'].ThestaticdegradationduetotheDCst…     

Influence of Ag doping on the microstructure and electrical properties of ZnO-Bi2O3-based varistor ceramics

Silver in the form of AgNO3 was added to ZnO-based varistor ceramics prepared by the solid-state reaction method.The effects of AgNO3 on both the microstructure and electrical properties of the varistors were studied in detail.The optimum addition amount of AgNO3 in ZnO-based varistors was also determined.The mechanism for grain growth inhibition by silver doping was also proposed.The results indicate that the varistor threshold voltage increases substantially along with the AgNO3 content increasing from 0 to 1.5mo1％.Also,the introduction of AgNO3 can depress the mean grain size of ZnO,which is mainly responsible for the threshold voltage.Furthermore,the addition of AgNO3 results in a slight decrease of donor density and a more severe fall in the density of interface states,which cause a decline in barrier height and an increase in the depletion layer.     

ZnO varistors with high voltage gradient and low leakage current by doping rare-earth oxide

The surge arrester of 1000 kV gas-insulated substation (GIS) needs ZnO varistor with high voltage gradient to effectively improve the potential distribution along ZnO varistor column inside the metal-oxide surge arresters. In this paper, the electrical and structural parameters of ZnO varistors are changed by doping with some rare-earth oxides, and the mechanism which leads these changes is discussed. When rare-earth oxide additives are added into ZnO varistors, the growing speed is slowed down due to the stabilization of the new spinel phases formed in the grain-boundary by rare-earth oxide additives, then the size of ZnO grains is smaller, and the voltage gradient of varistor increases obviously. By adding suitable amount of oxides of metal Co and Mn, the leakage current can be effectively decreased and the nonlinearity coefficient increased. The novel ZnO varistor samples sintered with the optimal additives have a voltage gradient of 492 V/mm, and the nonlinearity coefficient of 76, but their leakage currents are only 1 μA. Supported by the National Nature Science Foundation of China (Grant Nos. 50425721 and 50737001), and the 11th Five-Year National S&T Supporting Plan (Grant No. 2006BAA02A16)     

Ka波段二倍频器的研究与设计

利用反向并联二极管对的二倍频原理,设计了Ka波段二倍频器。用高级设计系统ADS设计软件包的射频设计软件对二倍频器的电路进行了模型设计和仿真分析,并对设计出的二倍频器进行了整体优化,研制了Ka波段的二倍频器;在整个Ka波段内的变频损耗为11.2±1.8 dB,减少了设计的理想模型与实际参数的偏差。     

压敏电阻器电气特性综合测量仪

介绍一种压敏电阻器电气特性测量仪．本仪器在恒流状态下测量压敏电压，在恒压状态下测量漏电流，用积分比较式除法器测量压比．设计了一种时序电路，可对上述３个参数进行自动测量，并提出了仪器向智能化方向发展的设想