涤纶工业丝环吹风改造的设计计算

应用PET纤维的冷却成形理论 ,结合空气调节的相关知识 ,提出了环吹风的设计计算方法 ,对涤纶工业丝环吹风进行了设计改造 ,满足了纺丝工艺要求     

半导体量子点中极化子的有效质量

研究了半导体量子点中极化子的有效质量.采用改进的线性组合算符方法,导出在电子-体纵光学声子(LO)强耦合时抛物量子点中极化子的振动频率、相互作用能和有效质量随受限强度和电子-声子耦合强度的变化.对RbCl晶体量子点进行了数值计算,结果表明,量子点受限越强,半导体量子点中强耦合极化子的振动频率和有效质量就越大;极化子的相互作用能随受限强度的增加先急剧增加,当达到极值后,随受限强度的增加而急剧减少     

普通稠油油藏启动压力梯度求解方法与应用

利用微观尺度管流模型,结合普通稠油流变特征,提出了在考虑稠油流变性条件下微观启动压力梯度计算方法.对渤海渤中18块不同渗透率岩心进行室内驱替实验,通过对实验数据的回归分析,得到不同粘度普通稠油油藏启动压力梯度与地层平均渗透率关系,并绘制了启动压力梯度的图版.将研究结果应用于普通稠油油藏,给出了利用启动压力梯度确定极限泄油半径及合理井距的理论计算方法.     

蒸发加热器换热管开裂失效分析

对某装置蒸发加热器316L材质的加热管使用15 d即发生了开裂和腐蚀减薄的原因进行了分析,认为在酸性的含有HAc、HBr、Cl-和硫酸盐等有害杂质的介质环境中,换热管不仅发生了应力腐蚀开裂,同时也发生了全面腐蚀和晶间腐蚀。     

锂离子电池用聚合物电解质的最新进展II.含液聚合物电解质

由于干态聚合物电解质目前还不能满足聚合物锂离子电池的应用要求,人们致力于开发含液体增塑剂的聚合物电解质,包括凝胶型和微孔型两类体系。本文综述了含液聚合物电解质的最新进展,重点论述了各种新体系和新方法。     

End‐Capping as a Method for Improving Carrier Injection in Electrophosphorescent Light‐Emitting Diodes

The electronic properties, carrier injection, and transport into poly(9,9‐dioctylfluorene) (PFO), PFO end‐capped with hole‐transporting moieties (HTM), PFO–HTM, and PFO end‐capped with electron‐transporting moieties (ETM), PFO–ETM, were investigated. The data demonstrate that charge injection and transport can be tuned by end‐capping with HTM and ETM, without significantly altering the electronic properties of the conjugated backbone. End‐capping with ETM resulted in more closely balanced charge injection and transport. Single‐layer electrophosphorescent light‐emitting diodes (LEDs), fabricated from PFO, PFO–HTM and PFO–ETM as hosts and tris[2,5‐bis‐2′‐(9′,9′‐dihexylfluorene)pyridine‐κ²NC_3′]iridium(III ), Ir(HFP)₃ as the guest, emitted red light with brightnesses of 2040 cd m^–2, 1940 cd m^–2 and 2490 cd m^–2 at 290 mA cm^–2 (16 V) and with luminance efficiencies of 1.4 cd A^–1, 1.4 cd A^–1 and 1.8 cd A^–1 at 4.5 mA cm^–2 for PFO, PFO–HTM, and PFO–ETM, respectively.     

Modeling of a constant Voltage transformer

This paper presents a comprehensive nonlinear model of the controlled constant voltage transformer also known as the ferroresonant transformer. Saturation is a normal mode of operation for this device. This paper derives an equivalent electrical circuit that relates to the physical structure of a typical design. The level of detail includes winding resistances, continuously nonlinear magnetizing inductances, tapped windings, and leakage inductances. The paper describes methods to extract the winding resistances, leakage inductances, and hysteresis loops of the transformer and how to fit the latter into single-valued nonlinear functions. The paper compares computer simulation results of the model with those obtained analytically and experimentally. The results show that the derived circuit will be very useful for designers of the ferroresonant transformer, which is used in uninterruptible power supplies.     

烟气轮机叶片应力分析与寿命评估方法评述

烟气轮机是炼油厂催化裂化装置的关键设备,合理预测叶片疲劳寿命是保障烟机安全运行的有效手段。从力学建模和边界条件两个方面简要阐述了叶片的应力分析方法,并系统分析了影响烟机叶片疲劳寿命的主要因素,提出了利用改进的局部应力应变法进行叶片寿命预测的合理性和叶片疲劳寿命的评估方法。     

射孔枪+内置式压力计托筒+水力泵新三联作试油(测试)工艺技术在大港油田研制与应用

该工艺技术是在原三联作(TCP+MFE+JET)基础上,根据大港油田勘探试油(测试)的需要,研制开发出的又一新技术,与原三联作相比,一趟管柱不但完成求产、测压、泵排工作,而且还能进行酸化等措施,提高了资料品质,减少了作业成本。经过6井次现场应用,全部达到了设计要求,取得了工艺、资料、成本、速度的较大进步,具有较高推广应用价值。