240MVA/220kV双绕组升压变压器工艺系数分析

对几台240MVA/220kV双绕组升压变压器的空载损耗、空载电流和短路阻抗这几个重要参数的试验数据和设计计算值进行了比较与分析,得出了这些参数的一些经验系数.     

粗纱机卷绕成形机构的技术进步

指出了传统粗纱机卷绕机构存在的问题，介绍了新型粗纱机卷绕成形的原理及新型粗纱机卷绕成形机构的优点。     

轮胎内衬层胶片卷取装置控制系统的研究

为实现轮胎内衬层胶片的恒张力卷取 ,采用扭矩控制 ,在卷取转速调节过程中加入半径调节的影响 ,通过变频调速使卷取转速同步跟踪牵引转速。在此基础上构成由计算机、PLC及变频器等组成的硬件系统 ,并应用恒张力控制原理分析了卷取张力不恒定的原因 ,提出了改进措施     

Investigation of Al-O-Al sites in an Na-aluminosilicate glass

This paper reports the presence of Al- O- Al linkages in an aluminosilicate glass where Si/Al = 1 by using 2D¹⁷O triple quantum MAS NMR technique (3Q MASNMR). The experiments were performed at external magnetic fields of 8.4 and 14.4T. Despite¹⁷OMAS NMR spectra of the sample in both fields do not give much information about the different kinds of linkages in the sample, 3Q MAS NMR spectrum shows clear evidence that there are some amounts of Al-O-Al linkages in the sample giving two completely resolved peaks. These two peaks were attributed to the Si-O-Al and Al-O-Al linkages on the basis of their chemical shifts and, quadrupolar coupling constants which are quite sensitive to the local structure.     

PUX3无级变速器在浆纱机上的使用

以GA301型浆纱机的恒张力卷绕系统为例,介绍了PUX3无级变速器的主要技术参数和作用原理.针对PUX3无级变速器在浆纱机运转中经常出现的机械故障进行分析,从安装和调整两方面讨论了卷绕张力的精确控制问题.     

高压电机匝间绝缘的可靠性探讨

论述了高压电机绕阻匝间绝缘故障发生原因，保护措施以及故障检测手段等，提出了提高匝间绝缘可靠性的办法。     

氧化膜铝带绕组起重电磁铁的改造

对氧化膜铝带绕组起重电磁铁改为铜绕组需注意的几个要点进行了阐述和分析，在此基础上结合改造实例介绍了改造过程中一些参数的计算方法。     

Investigation of Functional Hemispheric Asymmetry of Language in Tinnitus Sufferers.

The authors tested functional hemispheric asymmetry through word dichotic listening and lateralized lexical decision tasks in tinnitus patients and controls stimulated by a continuous tinnitus-like noise to test the influence of a tinnitus-like external stimulation. A classic right-ear advantage was shown in the auditory task for all but right-ear tinnitus patients, who performed as equally badly when the stimuli were presented to the right and left ears. Concerning the visual task, all participants demonstrated the expected right visual field advantage for word stimuli. Moreover, those who submitted to external stimulation demonstrated normal asymmetric patterns. These data suggest a specific effect of tinnitus on central processing and provide evidence for a functional reorganization induced by this auditory phantom perception. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

袋装生活垃圾破碎设备缠绕问题研究

我国城市袋装垃圾处理尚处在研发阶段,垃圾破碎设备的条件性破袋破碎、分选、防缠绕、刀具避让等问题是急需解决的关键技术.从垃圾缠绕物受力的角度分析造成缠绕的原因,确定形成缠绕的必要条件,导出数学表达式,分析垃圾破碎设备主要参数对缠绕的影响并提出防缠绕的一些方法与措施.     

多向纤维缠绕小样机的研制

首先对多向纤维缠绕制品的特性进行了分析。然后以实现多向纤维缠绕为基础,从总体结构、芯模零部件设计、传动系统设计以及控制系统设计等几个方面介绍了多向纤维缠绕小样机的研制。这些将为开发功能更完备的大型多向纤维缠绕机械提供很好的实践基础。