Phosphorus‐containing polyaryloxydiphenylsilanes with high flame retardance arising from a phosphorus–silicon synergistic effect

Polyaryloxydiphenylsilanes were prepared from phosphorus‐containing diols and diphenydichlorolsilane through solution polymerization. With a stoichiometric imbalance in feed monomers, the resulting polymers exhibited moderate melting points and good processing properties. The polymers prepared showed initial decomposition temperatures above 340 °C, excellent thermal stability, high char yields at 850 °C and very high limited oxygen index values of 56–59. The polymers' char yields and their (P + Si) contents showed linear relationships. © 2003 Society of Chemical Industry     

Intravaginal Controlled Administration of Flurogestone Acetate: (III) Development of Rate-Control Vaginal Devices

A Rate-Control vaginal device was developed which overcomes the low bioavailability and unpredictable Q - t^1/2 type release and absorption rate profiles of flurogestone acetate delivered by the currently marketed Syncro-Mate pessary.

The in vitro release and vaginal absorption profiles from the Rate-Control vaginal device were run simultaneously, a linear Q - t relationship was obtained with a significant improvement in bioavailability. A mathematical model was developed to correlate the in vitro drug release and the vaginal absorption profiles of flurogestone acetate from the vaginal devices.

The design, development and the simultaneous release and absorption profiles of flurogestone acetate from this new vaginal device were outlined and discussed.     

Development of Anticandidal Delivery Systems: (I) Anticandidal Activities of Antifungal Agents and Synergistic Combination with Other Drugs

Susceptibility testing with antifungal agents, e. g., minimum inhibitory concentration (MIC) determination, is performed to obtain reliable data that permit selection of the most suitable agents for treatment of an infective condition. To determine the drugs that provide maximum effectiveness against oral candidiasis, the MICs of various antifungal agents were determined. Also, synergism between two chosen antifungal agents was evaluated, and the effect of benzocaine, an anesthetic, and hydrocortisone, an antiinflammatory agent, on their MICs was examined. It was observed that among all the drugs tested, clotrimazole was the most promising candidate for use as an oral local antifungal. The combination of clotrimazole and chlorhexidine resulted in a decrease in the MIC. While the addition of hydrocortisone to this combination resulted in a slight increase in the MIC, the inclusion of benzocaine resulted in a substantial decrease in the MIC of the antifungal agent combination.     

Effects and properties of poly(arylene ether benzonitrile)s of various molecular weights blended with sulfonated poly(ether ether ketone)

Poly(arylene ether benzonitrile) (PAEBN) was synthesized with 2,6‐dichlorobenzonitrile and biphenol. PAEBNs with various molecular weights (MWs), 1,640,000 and 185,000 g/mol, were synthesized by control of the stoichiometry of the monomers and were blended with sulfonated poly(ether ether ketone) (SPEEK). The effects of MW on the water uptake, swelling, methanol permeability, and proton conductivity of the SPEEK/PAEBN blend membranes were investigated. The molecular mobility of the SPEEK/PAEBN blends was also examined in this study. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

改进工艺操作方法 降低脱硅锆能耗

从分析脱硅的条件出发,引导出新的工艺操作方法、工艺参数和加料方法。用一年的生产实践说明该新工艺操作方法的技术经济效益。     

VO_2热色智能玻璃研究进展

二氧化钒(VO2)是一种受人关注的热致变色材料,在68℃时发生从半导体相-金属相的转变,且相变可逆。在介绍智能玻璃在建筑节能中潜在应用的基础上,重点阐述了VO2纳米薄膜应用于智能型节能玻璃的国内外研究进展。较全面地论述了利用光学减反射技术提高VO2智能玻璃可见光透过率的技术现状。总结了VO2智能玻璃在实际应用中存在的技术难点:节能效率偏低、薄膜沉积温度高、外观颜色不美观、保温性能上的缺陷等。展望了VO2智能玻璃的研究与应用前景。     

双极关键工艺的在线统计分析

采用了双极晶体管作为双极工艺的测试结构,将在线工艺的统计分析理论应用于双极工艺,研制了双极工艺的统计分析软件。最后给出了双极工艺的某些分析结果。     

气田集输系统内腐蚀数据治理研究

目的内腐蚀数据治理是实现腐蚀控制管理业务数字化转型的重要前提,在现阶段内腐蚀数据来源不一、数据入库格式不统一、数据出现异常等背景下,引入内腐蚀数据治理能够高效解决腐蚀业务管理与数据管理脱节、数据标准化程度低以及数据质量难以控制等问题。 方法分析探究了中国石油西南油气田公司(以下简称西南油气田)地面集输系统各生产环节的内腐蚀数据采集管理现状、数据治理流程以及数据治理成效,并基于西南油气田腐蚀数据与控制管理平台展示重点区块的内腐蚀数据入库情况。 结果①通过制定内腐蚀数据标准和管理办法,规范了数据入库格式,提高了数据共享能力,降低了数据沟通成本,确保了各类数据及时、准确、完整、规范入库;②通过箱形图对内腐蚀数据开展异常数据识别研究,识别准确率达到88.3%,实现了内腐蚀数据质量的高效校准,提高了腐蚀数据分析评价结果的可信度;③基于内腐蚀数据入库研究,2022年完成了205个场站以及233条管线的数据入库,有助于全面了解西南油气田各气矿场站及管线的腐蚀情况;④基于治理后的内腐蚀数据,围绕腐蚀预测、风险评估和整体腐蚀控制进行了腐蚀数据决策支持研究,提高了数据的有效利用率。 结论内腐蚀数据治理的持续推进能够支撑西南油气田腐蚀控制管理业务数字化转型,为西南油气田全业务链数字化一体协同模式的构建奠定坚实基础。      

语音识别技术在电话语音自动拨号的应用

给出了一种应用于电话语音自动拨号的实时语音识别方法。该系统对特定人的语音进行识别,并将识别结果映射成相应的电话号码。实验结果表明该方法具有很高的识别精度和实时的识别速度,并且只需很小的内存空间就可以实现,是一种有效的应用于电话语音自动拨号等方面的语音识别方法。     

机载多光谱扫描仪的光谱定标

介绍了机载多光谱扫描仪光谱定标的原理、装置及实验方法,并给出了部分结果与讨论.