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Abstract: A new tubingless oil production unit is developed in the light of the shortcomings of the commonly-used tubingless oil production unit.
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文摘:国内常用的无油管采油装置在使用过程中易造成泵砂埋或泵下移，影响正常作业。 |
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Abstract: A new type cold frame is intruduced.The deformation of unsymmetry section steel after cooling is mainly eliminated by reversely curring it on line,ensuring the achievement of automation of meticulous repair.At the same time the disposing princip
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文摘:介绍了一种新型冷床，通过在线对非对称型钢进行反向弯曲，基本上消除了非对称型钢冷却后的变形，保证了精整工序自动化的实现.同时,提出了偏心轮驱动的冷床驱动轴上平衡重的配置原则.此方法可降低传动轴上所受的扭矩，减少了电动机的功率. |
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Abstract: A new type of production line for bluing has been introduced in this paper,which obtains such advantages as energy saving,water saving,freedom from pollution and automatic production process and is a green surface treating equipment as well.Ther
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文摘:本文介绍了一种新型发蓝生产线，具有节能，节水，无污染，生产过程自动化等优点，是一种绿色表面处理设备，已在国内链条行业得到了推广应用。 |
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Abstract: A new variable structure model reference adaptive control (VS-MRAC) scheme is proposed in this paper.By transforming a relative degree one system into a first-order-like differential equation,it is shown that the SPR (Strictly Positive Real)assu
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文摘:提出了一种可具有非严格正实参考模型的变结构鲁棒自适应控制方案，可去除变结构模型参考自适应控制中普遍要求参考模型为严格正实或当相对阶大于1时参考模型经补偿后为严格正实的假设.在此基础上提出的变结构控制律可保证跟踪误差在相对阶为1时于有限时间内收敛到零，而当相对阶大于1时则可使跟踪误差收敛到一个残差集内. |
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Abstract: A new-type hydraulic pusher is designed in order to improve the automation of tram operation in coal mine, which rises the reliability and efficiency of the original cage pusher.
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文摘:为了提高副井提升井口、井底车场操车自动化程度,设计了一种新型液压推车机,提高了推车机的安全性和工作效率. |
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Abstract: A noise model for the analog correlator used in the ultra wideband receivers is proposed due to lack of simulation capability on noise performance of the correlator in current EDA tools.The analog correlator circuit is divided into several parts
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文摘:给出了分析模拟相关器的噪声模型.将相关器分成不同的几个子模块后,对各模块分别计算等效噪声源.然后用理想脉冲源代替噪声源计算电路的时变传输函数,接着用傅里叶变换计算输入输出的频域关系.利用电路的对称结构合并对称的子模块可以进一步简化模型.该模型可以用来估计相关器的噪声性能. |
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Abstract: A novel computational model of 3-D flatness is developed, and a new model of flatness detection signal is explored.
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文摘:本文建立了三维板形计算模型和包括系统噪声的板形检测信号模型。 |
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Abstract: A novel driving circuit based on the UC3842 chip is introduced.The driving circuit can work at any duty ratio.It has some advantages,shch as high performence,low cost,strong protection function ect.This driving circuit can be used for single pow
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文摘:设计了一种新颖的基于UC3842芯片的功率开关器件驱动电路，此电路可以工作在任意占空比，具有高性能、低成本、保护功能强等优点，适用于功率开关器件MOSFET、GTR、IGBT的单管驱动。 |
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Abstract: A novel enzymatic reaction—ammonolysis was introduced in thenineties.This reaction not only provides a synthetically useful and mild alternative method for the synthesis of amides,but also can be used for the kinetic resolution of chiral alcohol
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文摘:酶促氨解反应是20世纪90年代中期发现的一种新型反应,在脂肪酸酰胺的合成、手性药物（手性酸及手性醇等）的拆分中显示出巨大的应用潜力，是除立体选择性水解、酯化、转酯反应之外的另一具有较大开发应用前景的酶促新型反应。 |
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Abstract: A novel method is presented which is called interferometric method.
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文摘:提出了一种新的研究测试高聚物体系中小分子物质迁移的方法――干涉法。 |
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Abstract: A novel strip-coil-baffle structure used to enhance heat transfer and support the tube bundle for a tube-shell heat exchanger is proposed.The new structure can sleeve the tubes in bundle alternatively to create a vortex flow in a heat exchanger.
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文摘:介绍了一种用于强化管壳式换热器壳侧传热和支撑管束的螺旋折流片新型结构,该结构是对换热器管子相间地套上螺旋折流片以产生旋涡流动.研究模型是在正方形布置的4个管子中的2个对角管子套上螺旋折流片后形成的通道,利用FLUENT软件对该上述四管通道模型的流场和温度分布情况进行了数值模拟;分析了四管通道模型中螺旋折流片对强化传热和流动阻力随雷诺数的变化关系的影响.算例结果显示该新型结构可比相同尺寸的光管通道中的情形传热系数提高约40﹪～55﹪,同时也将伴随较高的流动阻力.可以相信螺旋折流片式换热器将会在许多工业 |
