本文给出一个反例。说明了G. Birkhoff的《Lattice Theory》(3rd ed)P_(289)中的N.G/N字典扩张(Lexicographic extenaion of N by G/N)之定义的不正确性:同时得到了群G中正规po-子群(N.<)扩张G为po-群(G.<')的条件以及(G.<'...本文给出一个反例。说明了G. Birkhoff的《Lattice Theory》(3rd ed)P_(289)中的N.G/N字典扩张(Lexicographic extenaion of N by G/N)之定义的不正确性:同时得到了群G中正规po-子群(N.<)扩张G为po-群(G.<')的条件以及(G.<')的构造;又得到了群G为非平凡序po-群的充要条件.展开更多
目的了解内蒙古自治区结核分枝杆菌临床分离株的基因型构成,及该地区北京家族菌株的分布特征。方法从内蒙古自治区结核病防治研究所收集2011年全年临床分离的372株结核分枝杆菌菌株及其372例来源患者的背景资料,采用间隔区寡核苷酸分型(...目的了解内蒙古自治区结核分枝杆菌临床分离株的基因型构成,及该地区北京家族菌株的分布特征。方法从内蒙古自治区结核病防治研究所收集2011年全年临床分离的372株结核分枝杆菌菌株及其372例来源患者的背景资料,采用间隔区寡核苷酸分型(Spoligotyping)方法和BioNumerics 5.0软件进行基因分型分析,将372株临床菌株Spoligotyping分型结果与SpolDB 4.0数据库进行比对。另外,采用NTF及LSP对北京家族菌株进行分析。来源患者中汉族和蒙古族分别为282例及84例,其他为回族4例,维吾尔族和满族各1例,例数过少,因此仅分析主要民族与北京家族的易感性。以SPSS 13.0软件进行统计学分析,χ2检验分析不同民族与北京家族易感性。结果372株临床菌株共分为48种基因型,其中24种基因型为新的型别。85.48%(318/372)为北京家族,同时存在T家族(仅次于北京家族的主要流行基因型)占4.84%(18/372)、H家族(Haarlem)0.81%(3/372)、MANU家族(2004年最先于印度Delhi发现)0.27%(1/372)和LAM家族(Latin American and Mediter-ranean,拉丁美洲和地中海家族)0.27%(1/372)。汉族北京家族菌株占87.94%(248/282),非北京家族菌株占12.06%(34/282),蒙古族北京家族菌株79.76%(67/84),非北京家族菌株20.24%(17/84),差异无统计学意义(χ2=3.612,P=0.057)。结论内蒙古自治区结核分枝杆菌临床分离株基因具有多态性,且北京基因型为该地区主要流行株,而北京家族菌株与民族易感性间无关联。展开更多
To improve the reliability and accuracy of the global po- sitioning system (GPS)/micro electromechanical system (MEMS)- inertial navigation system (INS) integrated navigation system, this paper proposes two diff...To improve the reliability and accuracy of the global po- sitioning system (GPS)/micro electromechanical system (MEMS)- inertial navigation system (INS) integrated navigation system, this paper proposes two different methods. Based on wavelet threshold denoising and functional coefficient autoregressive (FAR) model- ing, a combined data processing method is presented for MEMS inertial sensor, and GPS attitude information is also introduced to improve the estimation accuracy of MEMS inertial sensor errors. Then the positioning accuracy during GPS signal short outage is enhanced. To improve the positioning accuracy when a GPS signal is blocked for long time and solve the problem of the tra- ditional adaptive neuro-fuzzy inference system (ANFIS) method with poor dynamic adaptation and large calculation amount, a self-constructive ANFIS (SCANFIS) combined with the extended Kalman filter (EKF) is proposed for MEMS-INS errors modeling and predicting. Experimental road test results validate the effi- ciency of the proposed methods.展开更多
s To investigate the DNA polymorphism of Sporothrix schenckii ( S schencki i ) and to find the relationship between DNA patterns and geographic areas and clinical manifestations Method The total DNA was ...s To investigate the DNA polymorphism of Sporothrix schenckii ( S schencki i ) and to find the relationship between DNA patterns and geographic areas and clinical manifestations Method The total DNA was extracted with hexadecyltrimethyl ammonium bromide Random A mplification of Polymorphic DNA (RAPD) assay was used to study DNA typing of 24 strains of S schenckii collected from different areas and isolated from di fferent clinical types Results Of seven random primers used, three primers (OPAA11, OPD18 and OPB07) gave good reactions, the sequences of which were 5' ACCCGACCTG 3', 5' GAGAGCCAAC 3', 5 ' GGTGAC^GCAG 3' respectively The RAPD patterns of the 24 isolates were not completely identical, showing certain degrees of hereditary variability Differ ent isolates showed a common conserved DNA band with the same primer Different clinical types showed different genotypes Conclusion RAPD analysis is useful in DNA typing of S schenckii , the DNA band type of which is related to geographic origin and Clinical manifestation展开更多
文摘本文给出一个反例。说明了G. Birkhoff的《Lattice Theory》(3rd ed)P_(289)中的N.G/N字典扩张(Lexicographic extenaion of N by G/N)之定义的不正确性:同时得到了群G中正规po-子群(N.<)扩张G为po-群(G.<')的条件以及(G.<')的构造;又得到了群G为非平凡序po-群的充要条件.
文摘目的了解内蒙古自治区结核分枝杆菌临床分离株的基因型构成,及该地区北京家族菌株的分布特征。方法从内蒙古自治区结核病防治研究所收集2011年全年临床分离的372株结核分枝杆菌菌株及其372例来源患者的背景资料,采用间隔区寡核苷酸分型(Spoligotyping)方法和BioNumerics 5.0软件进行基因分型分析,将372株临床菌株Spoligotyping分型结果与SpolDB 4.0数据库进行比对。另外,采用NTF及LSP对北京家族菌株进行分析。来源患者中汉族和蒙古族分别为282例及84例,其他为回族4例,维吾尔族和满族各1例,例数过少,因此仅分析主要民族与北京家族的易感性。以SPSS 13.0软件进行统计学分析,χ2检验分析不同民族与北京家族易感性。结果372株临床菌株共分为48种基因型,其中24种基因型为新的型别。85.48%(318/372)为北京家族,同时存在T家族(仅次于北京家族的主要流行基因型)占4.84%(18/372)、H家族(Haarlem)0.81%(3/372)、MANU家族(2004年最先于印度Delhi发现)0.27%(1/372)和LAM家族(Latin American and Mediter-ranean,拉丁美洲和地中海家族)0.27%(1/372)。汉族北京家族菌株占87.94%(248/282),非北京家族菌株占12.06%(34/282),蒙古族北京家族菌株79.76%(67/84),非北京家族菌株20.24%(17/84),差异无统计学意义(χ2=3.612,P=0.057)。结论内蒙古自治区结核分枝杆菌临床分离株基因具有多态性,且北京基因型为该地区主要流行株,而北京家族菌株与民族易感性间无关联。
基金supported by the National Natural Science Foundation of China (60902055)
文摘To improve the reliability and accuracy of the global po- sitioning system (GPS)/micro electromechanical system (MEMS)- inertial navigation system (INS) integrated navigation system, this paper proposes two different methods. Based on wavelet threshold denoising and functional coefficient autoregressive (FAR) model- ing, a combined data processing method is presented for MEMS inertial sensor, and GPS attitude information is also introduced to improve the estimation accuracy of MEMS inertial sensor errors. Then the positioning accuracy during GPS signal short outage is enhanced. To improve the positioning accuracy when a GPS signal is blocked for long time and solve the problem of the tra- ditional adaptive neuro-fuzzy inference system (ANFIS) method with poor dynamic adaptation and large calculation amount, a self-constructive ANFIS (SCANFIS) combined with the extended Kalman filter (EKF) is proposed for MEMS-INS errors modeling and predicting. Experimental road test results validate the effi- ciency of the proposed methods.
基金ThisworkwasfinanciallysupportedbyagrantfromtheEducationCommissionofLiaoningProvince (No 990 2 2 1 0 69)
文摘s To investigate the DNA polymorphism of Sporothrix schenckii ( S schencki i ) and to find the relationship between DNA patterns and geographic areas and clinical manifestations Method The total DNA was extracted with hexadecyltrimethyl ammonium bromide Random A mplification of Polymorphic DNA (RAPD) assay was used to study DNA typing of 24 strains of S schenckii collected from different areas and isolated from di fferent clinical types Results Of seven random primers used, three primers (OPAA11, OPD18 and OPB07) gave good reactions, the sequences of which were 5' ACCCGACCTG 3', 5' GAGAGCCAAC 3', 5 ' GGTGAC^GCAG 3' respectively The RAPD patterns of the 24 isolates were not completely identical, showing certain degrees of hereditary variability Differ ent isolates showed a common conserved DNA band with the same primer Different clinical types showed different genotypes Conclusion RAPD analysis is useful in DNA typing of S schenckii , the DNA band type of which is related to geographic origin and Clinical manifestation