CSTN—LCD驱动芯片中跟随器的设计与实现     

张静 《茂名学院学报》2010,20(1):26-28,31

跟随器是CSTN—LCD系统中的关键模块,对提高系统的显示质量、改善系统的串扰具有决定性的作用。提出了一种CSTN-LCD驱动芯片中跟随器的实现方案：电路采用共源共栅频率补偿保证良好的频率响应特性,提高了对电源和地的抖动的抑制比;并引入浮栅电流源为AB类输出级提供偏置电流,使得电路结构更紧凑。基于GSMC±9V的0．18μmCMOS高压工艺SPICE模型进行了仿真分析,结果表明：去掉1μF外接电容,增益带宽积为350kHz,相位余度86°;在1MHz处PSRR＋,一均大于-30dB。流片验证与测试结果表明：跟随器的电路面积小于600×100μm2;且在没有1μF外接电容下也能满足CSTN—LCD的高性能要求。  相似文献   

农村非正规金融:社会主义新农村建设的重要力量     

陶劲 《北京工业职业技术学院学报》2010,9(4):113-116

在全面建设社会主义新农村背景下,农村金融制度的改革与发展显得尤为重要。在现阶段,社会主义新农村建设中存在着严重的金融抑制。从农村的实际情况出发,对农村非正规金融的现状进行分析,指出农村非正规金融提高了资金的运作效率,缓解了社会主义新农村建设中资金供求的矛盾,推动了多样化竞争格局的农村金融体系的形成,对社会主义新农村建设起到的重要作用。只有量体裁衣的发展农村非正规金融才能更好的为社会主义新农村建设服务。  相似文献   

注意缺陷多动障碍亚型反应抑制能力研究     

郑碧波 《中小学心理健康教育》2010,(19):15-18

注意缺陷多动障碍（ADHD）是儿童常见的一种精神疾病,它有不同的亚型。反应抑制是ADHD执行功能的核心缺损,对反应抑制的研究能够帮助我们了解ADHD神经心理功能,也能够在一定程度上帮我们区分和诊断ADHD亚型。本文主要介绍了一些用于研究ADHD亚型反应抑制的常用方法,并且对于这些方法及其研究成果作了比较。  相似文献   

具分布时滞SICNN_s周期解的存在性(英文)     

陈安平  杜德军 《湘南学院学报》2010,31(5)

利用重合度理论和微分不等式技巧,研究了具分布时滞和变系数SICNNs周期解的存在性,获得了一些新的充分准则.本文结果补充已有文献的结论.  相似文献   

工作记忆与阅读理解能力的关系述评   总被引：1，自引：0，他引：1  

高郑玉 《湖北成人教育学院学报》2010,16(6):15-16

自Bddeley和Hitch提出工作记忆的概念后,国内外的学者就在这一方面展开了研究,其中工作记忆与阅读理解能力的关系成为语言认知心理学研究领域的热点之一。研究者们将重点集中于工作记忆的语音回路,抑制机制对阅读理解的作用上并取得了一定的成绩,但是对一些具体的方面如语音回路是在理解的早期发挥作用还是在理解的后期发挥作用等问题,不同的学者仍持不同的观点,所以本文在综合评述阅读理解能力与工作记忆关系的基础上,又指出了现有研究的不足以及未来研究的发展方向。  相似文献   

Human cancer genetics     

Li M  Albertson D 《Journal of Zhejiang University. Science. B》2006,7(2):164-164

Cancer is a genetic disorder.Although heredi-tary cancers account for only a small fraction of all tumors,most cancers are caused by a variable mix of heredity and environment that leads to accumulations of genetic alterations and then uncontrolled cell pro-liferations(Kops et al.,2005).In addition,genetic alteration is one of the a few most important bio-logical factors that determine the diagnosis and prognosis of different cancers and dictate the treat-ment strategies for cancer patients.Fu…  相似文献   

Science Letters：IGFBP7 plays a potential tumor suppressor role against colorectal carcinogenesis with its expression associated with DNA hypomethylation of exon 1   总被引：1，自引：0，他引：1  

Ruan WJ  Lin J  Xu EP  Xu FY  Ma Y  Deng H  Huang Q  Lv BJ  Hu H  Cui J  Di MJ  Dong JK  Lai MD 《Journal of Zhejiang University. Science. B》2006,7(11):929-932

Insulin-like growth factor binding-protein-7 （IGFBP7） was obtained from our previous colonic adenocarcinoma （CRC） and normal mucosa suppression subtraction hybridization （SSH） cDNA libraries. By RT-PCR and immunohistochemistry, we found that IGFBP7 was overexpressed in CRC tissue compared to normal tissue. However, our in vitro experiments performed in 10 CRC cell lines showed that IGFBP7 expressed only in SW480 and Caco2 cell lines, which implied an underlying reversible regulatory mechanism. Using methylation-specific PCR （MSP） and bisulfite sodium PCR （BSP）, we found that its expression was associated with DNA hypomethylation of exonl. This was further supported by the in vitro study which showed restored IGFBP7 expression after demethylation agent 5-aza-2＇-deoxycytidine treatment. Correlation analysis between IGFBP7 expression and prognosis indicated that overexpression of IGFBP7 in CRC tissue correlated with favourable survival. Investigation of the functional role of IGFBP7 through transfection studies showed that IGFBP7 protein could inhibit growth rate, decrease colony formation activity, and induce apoptosis in RKO and SW620 cells, suggesting it a potential tumor suppressor protein in colorectal carcinogenesis. In conclusion, our study clearly demonstrated that IGFBP7 plays a potential tumor suppressor role against colorectal carcinogenesis and its expression is associated with DNA hypomethylation of exon 1.  相似文献   

Inhibitive effects of anti-oxidative vitamins on mannitol-induced apoptosis of vascular endothelial cells     

Pan KY  Shen MP  Ye ZH  Dai XN  Shang SQ 《Journal of Zhejiang University. Science. B》2006,7(10):825-829

Objective： Study blood vessel injury and gene expression indicating vascular endothelial cell apoptosis induced by mannitol with and without administration of anti-oxidative vitamins. Methods： Healthy rabbits were randomly divided into four groups. Mannitol was injected into the vein of the rabbit ear in each animal. Pre-treatment prior to mannitol injection was per- formed with normal saline （group B）, vitamin C （group C） and vitamin E （group D）. Blood vessel injury was assessed under electron and light microscopy. In a second experiment, cell culture specimen of human umbilical vein endothelial cells were treated with mannitol. Pre-treatment was done with normal saline （sample B）, vitamin C （sample C） and vitamin E （sample D）. Total RNA was extracted with the original single step procedure, followed by hybridisation and analysis of gene expression. Results： In the animal experiment, serious blood vessel injury was seen in group A and group B. Group D showed light injury only, and normal tissue without pathological changes was seen in group C. Of all 330 apoptosis-related genes analysed in human cell culture specimen, no significant difference was seen after pre-treatment with normal saline, compared with the gene chip without pre-treatment. On the gene chip pre-treated with vitamin C, 45 apoptosis genes were down-regulated and 34 anti-apoptosis genes were up-regulated. Pre-treatment with vitamin E resulted in the down-regulation of 3 apoptosis genes. Conclusion： Vitamin C can protect vascular endothelial cells from mannitol-induced injury.  相似文献   

水泥砼路加铺沥青混凝土面层的探析     

陈波  梁珂 《南通职业大学学报》2013,(2):102-104

在旧水泥混凝土路面加铺沥青面层是目前比较普遍的城市道路改造方法,但由于其基层的特殊性,出现反射性裂缝在所难免。文章对基层的修复处理、加铺沥青面层施工的要点以及抑制和延缓反射性裂缝产生的若干方案进行了比较分析,以期对提高加铺工程质量、减少道路病害提供参考。  相似文献   

铁齿铜牙小陈鑫     

赵亮  陈超 《小星星(作文100分)》2013,(Z1):37-38

"哈哈哈……咳咳……呵呵……"阵阵大笑声中不时还传出几声抑制不住的咳嗽。从窗户往里看,六(2)班的孩子们正笑作一团呢!男生正在手舞足蹈地疯狂大笑着,女生则害羞地捂着嘴,可笑声还是调皮地从指缝里钻了出来……不过也有例外  相似文献