具有负载识别功能的数字电能表设计

针对现有电能表精度差、可靠性低的问题,设计了一种基于SST89E564RD单片机和ADE7753电能计量芯片的智能数字电能表,该数字电能表具有能量累积、费用计算、恶性负载识别、过流过载保护、定时关断、电力线载波通信等功能.给出了硬件原理和软件流程,采用C语言模块化编程,便于理解和维护.市场应用表明该数字电能表精度能够达到1.0级,运行可靠,具有广泛的应用前景.     

模因论观照下《红楼梦》译本中语言文化信息的传播

用英国学者里查德.道金斯提出的模因论——文化的传播是通过非遗传方式,特别是模仿实现的;在传播过程中,核心模因（语言模因）和其他模因（非语言模因）对不同宿主产生不同的刺激和感染——分析我国古典小说《红楼梦》,进一步说明源语中的语言和文化信息在目的语中传递时的不同表现形式,以加深对翻译模因现象的认识。     

"好好芭"种子实生苗茎节无性系建立及其遗传差异

采用“好好芭”种子萌发的无菌苗茎节作为外植体,利用体外微繁殖技术,通过茎节培养获得大量体细胞无性系克隆,研究了植物生长调节物质脱落酸、矮壮素对试管苗生长繁殖的影响,随机选择一些克隆进行表型的遗传差异分析,结果表明克隆间的遗传差异是显著的,因此,利用种子实生苗的遗传变异广泛性进行种子实生苗茎节克隆的筛选和培育新品种,是完全可行的。     

Phenotypic analysis of the medullary-type CD4−CD8+ thymocytes in mice

Phenotypic analysis of the medullary-type CD4 CD8⁺ (CD8SP) thymocytes has revealed phenotypic heterogeneity within this cell population. The phenotype of mature peripheral CDS⁺T cells is TCRαβ⁺CD3⁺Qa-2⁺HSA 3G11⁻6C10, whereas in the medullary-type CD8SP thymocytes, 20% are Qa-2⁺; 33%, HAS; 30%, 3G11; and 70% are 6C10. The disparate expression patterns of these four cell surface markers suggest that medullary-type CD8SP thymocytes may undergo phenotypic maturation process. According to the distribution of these four cell surface markers, six subgroups of CD8SP thymocytes have been identified. The precursor-progeny relationship along with developmental pathway is postulated as follows: 6C10⁺HSA⁺3G11 Qa-2→ 6C10⁺HSA⁺ 3G11⁺Qa-2 → 6C10 HSA⁺3G11⁺Qa-2 → 6C10⁻HSA⁻3G11⁺Qa-2 → 6C10⁻HSA⁻3G11 Qa-2 → 6C10⁻HA S 3G11 Qa-2⁺, the cells in the last subgroup exit the thymus and home into periphery.     

试论国内恶性税收竞争对我国或有债务的影响

文章阐述了或有债务的涵义及国内或有债务的现状;剖析了国内恶性税收竞争对我国或有债务发生影响的实现机制;分析了国内恶性税收竞争对我国或有债务的影响,提出了治理国内恶性税收竞争,规范税收支出,规避或有债务风险的法制化手段。     

中国人十四个群体中Gm和Km因子的分布

本文研究了中国昆明汉族、贵州汉族、广西侗族、大连汉族、山东汉族、沈阳朝鲜族、宁夏回族的Gm和Km因子的表型频率及四川、广西、武汉、上海、长春汉族和广西壮族、新疆维吾尔族共十四个群体的Gm单倍型频率、Km基因频率,并用Gm单倍型频率计算了中国14个群体与其他人种国家的3个群体间的遗传距离和这些群体的系统树。结果表明Gm分布不均一,提示早先大陆上存在的两个群体曾发生过迁移和混杂,在新疆维吾尔族和宁夏回族中均发现白种人和黄种人血缘融合的现象。群体中Km频率呈随机分布。     

基于酵母基因组高通量数据的基因-基因相互作用预测

后基因组时代的显著特点是大规模基因组和蛋白质组实验平台所产生的大量高通量数据,整合并利用基因组和蛋白组信息成为这一时代的主要挑战之一. 因此,基因-基因相互作用将有助于理解细胞内基因之间的相互作用以及信号传导通路研究提供有价值的参考. 为预测酵母基因组中基因-基因相互作用,我们利用高通量数据中的蛋白-蛋白相互作用、遗传表型数据、基因微阵列表达数据以及功能基因注释数据等来分析酵母中的基因-基因相互作用. 本文建立的预测方法为在系统水平上理解酵母基因组中的基因功能提供了依据,也为揭示酵母基因组中的基因-基因相互作用网络奠定理论基础.     

High frequency of human cytomegalovirus (HCMV)-specific CD8+-T cells detected in a healthy CMV-seropositive donor

Human cytomegalovirus (HCMV) persists after infection but is controlled by cellular immune responses, particularly by CD8⁺ T cells. If infected individuals are immunosuppressed, HCMV can be reactivated. Upon testing the blood of healthy donors with human lymphocyte antigen tetramers, we found one individual with about 50 % of his CD8⁺ T cells being specific for the immunodominant pp65 epitope NLVPMVATV. Over a period of 2 years the high level of HCMV-specific T cells was maintained, and no HCMV DNA could be detected. At one timepoint, however, HCMV-specific DNA was detected, while 65 % of CD8⁺ T cells were specific for HCMV. When virus was detectable, a lower percentage of HCMV-specific CD8⁺ T cells showed interferon γ (IFN-γ) production after peptide stimulation in vitro. These data suggest that HCMV reactivation may also occur in immunocompetent persons, accompanied by the presence of HCMV-specific CD8⁺ T cells which are not producing IFNγ, and therefore potentially anergic or in vivo exhausted. Received 6 March 2002; received after revision 15 April 2002; accepted 17 April 2002     

Establishment of widely expressed<Emphasis Type="Italic">hb1f</Emphasis> transgenic mouse lineage and its morphologic analysis

Human nuclear receptor hB1F is a novel member of the fushi tarazu factor Ⅰ subfamily of nuclear receptor superfamily. The studies about its homologous genes indicate that hB1F may play a key role in regulating the metabolic homeostasis of cholesterol. After obtaining the founder mice carrying the trausgeue of hblf by microiujectiou, each founder was mated to normal C57 mouse and the positive F1 by PCR identification of the same founder were iutercrossed within sisters and brothers to establish the trausgeuic mouse lineage. The results of F1, F2 and offspring of test cross identification showed that the widely expressed hb1f trausgeuic mouse lineage was established successfully in this study. The tissue morphology of the trausgeuic lineage was also analyzed preliminarily.     

影响出生素质的源头性因素

人口出生素质问题是人口科学的重要研究内容 ,需要进行相关学科的深层交叉与贯通整合。影响出生素质的源头因素 ,初步包括生育主体孕前的精神行为状态与身心成熟水平两类中观变量 ;它们分别以应激 /审美方式、育龄表型为标志 ,能够对主体的生殖细胞发育成熟质量产生深刻久远的影响。主要观点 :①身心差相成熟阶段论 ;②孕前应激干扰生殖发育原理 ;③最佳育龄段 ;④生殖优劣决定期。有关的理论旁证与间接实证提示 ,生育主体孕前的状态选择和行为调节可以提升后代出生素质、促进多元生殖健康水平