2,7‐Carbazolenevinylene‐Based Oligomer Thin‐Film Transistors: High Mobility Through Structural Ordering

We have fabricated organic field‐effect transistors based on thin films of 2,7‐carbazole oligomeric semiconductors 1,4‐bis(vinylene‐(N‐hexyl‐2‐carbazole))phenylene (CPC), 1,4‐bis(vinylene‐(N′‐methyl‐7′‐hexyl‐2′‐carbazole))benzene (RCPCR), N‐hexyl‐2,7‐bis(vinylene‐(N‐hexyl‐2‐carbazole))carbazole (CCC), and N‐methyl‐2,7‐bis(vinylene‐(7‐hexyl‐N‐methyl‐2‐carbazole))carbazole (RCCCR). The organic semiconductors are deposited by thermal evaporation on bare and chemically modified silicon dioxide surfaces (SiO₂/Si) held at different temperatures varying from 25 to 200 °C during deposition. The resulting thin films have been characterized using UV‐vis and Fourier‐transform infrared spectroscopies, scanning electron microscopy, and X‐ray diffraction, and the observed top‐contact transistor performances have been correlated with thin‐film properties. We found that these new π‐conjugated oligomers can form highly ordered structures and reach high hole mobilities. Devices using CPC as the active semiconductor have exhibited mobilities as high as 0.3 cm² V^–1 s^–1 with on/off current ratios of up to 10⁷. These features make CPC and 2,7‐carbazolenevinylene‐based oligomers attractive candidates for device applications.     

一种新的基于混沌的语音、噪声判别方法

语音通信中,区别发音段和非发音段具有一定的意义。其关键在于提取发音段和非发音段的不同特征参数。本文基于混沌信号处理,提出了一种新的语音、噪声判别方法。该方法提取信号在不同相空间重构维下的虚邻点,从而根据信号高维虚邻点平台的不同,判别发音段和非发音段（背景噪声）以及发音段所含噪声的强弱,本文阐述了该方法的原理,讨论了其性能,仿真实验表明,本方法具有较好的结果。     

高温酸化助排剂HC2-1的研究

为了满足高温油藏和深井酸化作业残酸返排的需要，通过表面活性剂的筛选和复配研究，得到了高温酸化助排剂HC2—1。其性能评价结果表明，HC2—1具有使用浓度低、表面活性高的特点，在20％的HCI溶液中，当其浓度为50mg／L时，表面张力为20．7mN／m；具有良好的耐温性能，在180℃下恒温48h，HC2—1仍保持较高的表面活性；具有良好的耐盐能力，加有HC2—1的20％HCl溶液和CaCO3反应至HCl完全消耗，整个反应过程体系无新相生成且表面张力基本不变；可增大酸液体系的润湿角，进一步降低毛细管阻力，使酸液返排率由46％提高到97％，在促进酸液返排的同时与原油不发生乳化反应。     

大港油田官109-1断块稠油油藏碱/表面活性剂吞吐采油技术

大港油田官109-1断块稠油油藏的油井由于井筒、近井地带发生原油有机沉积,储层原油流动性差,采用多种方法都不能正常生产。为此研制了一种碱性解堵液,用于油井化学吞吐。该解堵液为复配碱和抗硬剂等添加剂的10%两性木质素表面活性剂溶液,能使玻璃片表面由亲油变强亲水,在石英上的接触角为6°(稀释至1/2和1/4浓度时为11°和12°),与羊大站原油间的界面张力为1.75×10-3~3.18×10-3mN/m。该解堵液与黏度1~50 Pa.s的不同区块稠油按体积比1∶1混合形成的乳状液,60℃、175 s-1黏度为2~6 mPa.s,在配液水矿化度高达6000mg/L以上或钙镁离子浓度高达250 mg/L时,该解堵液仍能保持对稠油的乳化降黏能力。该解堵液从实验岩心中驱出的原油量比地层水多75%,驱出液为乳状液。通过一个井例介绍了化学吞吐工艺:先用一种降黏解堵液对油井进行预处理,清洗油管、炮眼及近井地带,再注入碱性解堵液(该井例中为500 m3),注入时间约15小时,然后开井生产。2000年2月至2002年6月在16口新投产井实施化学吞吐(第一轮次),15口井有效,其中2口井先后转注水,其余13口井到2005年底仍继续产油。图1表6参5。     

RHT系列渣油加氢催化剂在胜利炼油厂VRDS装置上的工业应用

介绍由北京石油化工研究院研制、开发、用于渣油加氢装置固定床反应器的RHT系列催化剂在胜利炼油厂VRDS装置的首次工业应用情况。该催化剂采用自行开发的级配路线,较好地结合了脱金属剂、脱硫剂、脱氮剂的性能特点,使整个运行周期的催化剂活性和稳定性达到较好地匹配,已达到同类进口催化剂的水平。     

提高电脱盐效果的措施

中国石油天然气股份有限公司庆阳石化分公司常压蒸馏装置一、二期技术改造结束后,装置加工能力由0．5 Mt/a增加到1．0 Mt／a,最高时达到1．3 Mt/a。但电脱盐装置脱后原油中盐的质量浓度一直在4．0-5．0 mgNaCL／L居高不下。为了降低脱后原油中盐的质量浓度,提高催化裂化装置催化剂活性,对电脱盐装置进行了技术改造,优化了操作参数,这到了脱后原油中盐的质量浓度小于3 mg- NaCl/L的预期效果,取得了较好的经济效益。     

金银花及其制剂含药血清中绿原酸HPLC紫外光谱测定和抑菌活性研究

目的:考察金银花及其复方制剂的含药血清抑菌效果.方法:采用最低抑菌浓度(MIC)测定方法和抑菌活性试验方法.结果:金银花含药血清和银黄口服液含药血清对大肠杆菌的MIC都为1μg/mL;对金黄色葡萄球菌的MIC分别为0.5μg/mL和0.25μg/mL,含药血清抑菌活性为高敏.结论:金银花及其复方制剂的含药血清具有较强的抑菌作用.     

Generation of Primary Input Blocking Pattern for Power Minimization during Scan Testing

In this paper we propose a new approach to generate a primary input blocking pattern for applying to the primary inputs during shift cycle such that the switching activity occurred in the combinational part of the circuit under test can be suppressed as much as possible. The primary input blocking technique suppresses transitions of gates in the combinational part during scan by assigning controlling values to one of the gates' inputs. However, simultaneously assigning controlling values to the gates may result in conflicts in the setting of binary values on the primary inputs. Instead of the heuristics based on fanout in other approaches, we use the impact function which is based on transition density to determine the priorities of the gates to be blocked. Experiments performed on the ISCAS 89 benchmark circuits show that the proposed approach can always produce better results than the existing approaches.

Highly Efficient Orange and Green Solid‐State Light‐Emitting Electrochemical Cells Based on Cationic IrIII Complexes with Enhanced Steric Hindrance

Highly efficient orange and green emission from single‐layered solid‐state light‐emitting electrochemical cells based on cationic transition‐metal complexes [Ir(ppy)₂sb]PF₆ and [Ir(dFppy)₂sb]PF₆ (where ppy is 2‐phenylpyridine, dFppy is 2‐(2,4‐difluorophenyl)pyridine, and sb is 4,5‐diaza‐9,9′‐spirobifluorene) is reported. Photoluminescence measurements show highly retained quantum yields for [Ir(ppy)₂sb]PF₆ and [Ir(dFppy)₂ sb]PF₆ in neat films (compared with quantum yields of these complexes dispersed in m‐bis(N‐carbazolyl)benzene films). The spiroconfigured sb ligands effectively enhance the steric hindrance of the complexes and reduce the self‐quenching effect. The devices that use single‐layered neat films of [Ir(ppy)₂sb]PF₆ and [Ir(dFppy)₂sb]PF₆ achieve high peak external quantum efficiencies and power efficiencies of 7.1 % and 22.6 lm W^–1) at 2.5 V, and 7.1 % and 26.2 lm W^–1 at 2.8 V, respectively. These efficiencies are among the highest reported for solid‐state light‐emitting electrochemical cells, and indicate that cationic transition‐metal complexes containing ligands with good steric hindrance are excellent candidates for highly efficient solid‐state electrochemical cells.     

甲基叔戊基醚合成反应的热力学分析

利用戊烯与甲醇合成甲基叔戊基醚(TAME)反应的热力学平衡实验数据, 选择不同的混合活度模型,分别计算得到了该反应体系的平衡常数,并与理论计算得到的平衡常数相比较,筛选出了适合该反应体系的活度计算模型.