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辽宁地区震群序列性质的研究 被引量:12
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作者 孙文福 王玉莹 李芳 《地震》 CSCD 北大核心 2000年第4期63-68,共6页
利用经验类比的方法 ,对 1 999年 1 1月岫岩偏岭震群序列及以往在辽宁地区发生一些典型的具有地震预报意义的前兆震群和前震序列进行了详细研究。结果显示 ,前兆震群与前震序列之间差别很大 ,其性质和前兆特征迥然不同。 1 999年 1 1月... 利用经验类比的方法 ,对 1 999年 1 1月岫岩偏岭震群序列及以往在辽宁地区发生一些典型的具有地震预报意义的前兆震群和前震序列进行了详细研究。结果显示 ,前兆震群与前震序列之间差别很大 ,其性质和前兆特征迥然不同。 1 999年 1 1月岫岩 5.6级地震震前序列与 1 975年海城 7.3级地震前震序列特征及性质相同 ,属于前震序列。同时 ,研究结果中也包含了判别地震序列性质的方法和须要注意的问题。 展开更多
关键词 前兆震群 前震序列 地震序列性质 前兆特征
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后续地震发生时间估计及序列性质判定——以海城7.4级、巴楚—伽师6.8级地震序列为例 被引量:2
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作者 蒋海昆 聂晓红 《内陆地震》 2003年第3期193-201,共9页
在前人研究的基础上,给出利用参数k判定序列性质及利用前期地震预测后续地震发生时间的方法。理论分析表明,参数k以0为界,不同的取值表征了不同的地震活动状态,这与地震趋势估计及后续地震预测密切相关。k<0表明地震间时间间隔逐渐增... 在前人研究的基础上,给出利用参数k判定序列性质及利用前期地震预测后续地震发生时间的方法。理论分析表明,参数k以0为界,不同的取值表征了不同的地震活动状态,这与地震趋势估计及后续地震预测密切相关。k<0表明地震间时间间隔逐渐增长,呈现一种类似余震序列逐渐衰减的活动特征;k=0意味着地震间时间间隔不变,地震活动表现为以T为周期的准周期性活动;k>0表明地震间时间间隔逐渐缩短,呈现一种类似前震序列或地震累积频次指数增长的异常活动特征。如果k值在正、负区间随机分布,则该组地震之间无相关性可言。利用1975年2月4日海城7.4级地震前、余震序列及2003年2月24日巴楚—伽师6.8级地震序列对上述方法进行了检验并对有关问题进行了初步讨论。 展开更多
关键词 序列性质 前震序列 余震序列 后续地震 地震活动状态
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关于1999年岫岩偏岭5.6级地震前震群序列性质的研究 被引量:6
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作者 孙文福 王玉莹 李芳 《东北地震研究》 2000年第2期45-49,共5页
利用经验类比的方法,对1999年11月29日岫岩偏岭5.6级地震前震群序列及以往在辽宁地区发生的典型具有预报意义的1988年2月25日彰武4.8级地震前岫岩偏岭前兆震群和1975年2月4日海城7.3级地震前震序列进行了详细研究.结果显示,1999年1... 利用经验类比的方法,对1999年11月29日岫岩偏岭5.6级地震前震群序列及以往在辽宁地区发生的典型具有预报意义的1988年2月25日彰武4.8级地震前岫岩偏岭前兆震群和1975年2月4日海城7.3级地震前震序列进行了详细研究.结果显示,1999年11月29日岫岩偏岭5.6级地震前震群序列与1975年2月4日海城7.3级地震前震序列的统计特征及性质相同,因此,认为该序列属于前震序列.同时,还提出了将序列的表象特征与其参数特征相结合的识别序列性质的方法. 展开更多
关键词 前兆震群 前震序列 序列特征 序列性质 岫岩
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地震序列性质与断层分维研究 被引量:2
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作者 武孔春 《地震研究》 CSCD 北大核心 1991年第1期23-29,共7页
本文引入地震断层的自扩展破裂模式,用以解释地震序列的特征并计算地震断层的分维数。由自扩展破裂模式,本文导出地震断层的分维数为D=ln(1+Abln q/1+q)/ln q/1+q,其中q为余震区长度与主震的破裂尺度之比,A=2.1。在q≥1时,D=Ab,这与Aki... 本文引入地震断层的自扩展破裂模式,用以解释地震序列的特征并计算地震断层的分维数。由自扩展破裂模式,本文导出地震断层的分维数为D=ln(1+Abln q/1+q)/ln q/1+q,其中q为余震区长度与主震的破裂尺度之比,A=2.1。在q≥1时,D=Ab,这与Aki的公式b=D/2是一致的。 展开更多
关键词 地震 序列性质 断层 分维
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基于序列性质检验的中国股票市场弱式有效性研究 被引量:1
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作者 屈博 庞金峰 《浙江金融》 北大核心 2014年第11期59-67,共9页
本文拟采用经验数据对中国股票市场的弱式有效性进行检验。基于2010年4月16日至2013年5月31日的5分钟高频数据,运用Q统计量法、方差比检验法、广义谱检验、游程检验等多种方法对数据序列的性质进行检验,研究结果表明:不同的检验算法对... 本文拟采用经验数据对中国股票市场的弱式有效性进行检验。基于2010年4月16日至2013年5月31日的5分钟高频数据,运用Q统计量法、方差比检验法、广义谱检验、游程检验等多种方法对数据序列的性质进行检验,研究结果表明:不同的检验算法对中国股票市场弱式有效性的支持程度不同,原因是它们所针对的序列性质不同;中国股票市场在较短的考察期内具备弱式有效性,而随着考察期长度的增加,市场趋于拒绝弱式有效性。 展开更多
关键词 中国股票市场 弱式有效性 序列性质检验 高频数据
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首都圈东部地区震群序列性质判定 被引量:1
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作者 岳晓媛 武安绪 +1 位作者 冯刚 马梁 《地震地磁观测与研究》 2019年第4期8-15,共8页
采用传统方法和数字地震学方法(视应力),对首都圈东部地区2009—2017年发生的震群序列性质进行分析,分析结果表明:①使用传统方法不能确定震群序列性质,可以利用视应力方法进一步分析,该方法能够反映每个震群应力场的变化特征,可以进行... 采用传统方法和数字地震学方法(视应力),对首都圈东部地区2009—2017年发生的震群序列性质进行分析,分析结果表明:①使用传统方法不能确定震群序列性质,可以利用视应力方法进一步分析,该方法能够反映每个震群应力场的变化特征,可以进行异常性质判别;②通过2种方法的对比分析,可以提高震群序列异常性质判定结果的科学性和可信度,为后续地震活动趋势提供有力的参考依据。对2种方法进行震例检验,可知后续地震一般为中等以上地震,在震群(具有异常性质)发生1—7个月后发震,发震位置在震源区附近。 展开更多
关键词 首都圈东部 震群序列性质 传统方法 视应力
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序列运算与序列性质的分析
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作者 张莉 《计算机与现代化》 2000年第6期39-41,47,共4页
鉴于密钥流序列的特性 ,分析序列经过运算后所得新序列的性质 ,并得出一些结论与证明。
关键词 密钥流 序列运算 序列性质 密码学
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大邑双河M_s4.6级地震序列特征
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作者 李昌树 《四川地震》 1991年第1期50-53,共4页
1990年1月在成都市大邑县双河区先后发生了4.2和4.6级地震,此为双震型地震,整个地震序列 b 值很低。两次地震震级差很小,但波及的范围、破坏的程度却明显不同。龙门山前山断裂是这次地震的发震构造。
关键词 大邑 地震 Ms4.6级 序列性质
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水口水库诱发地震研究 被引量:12
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作者 许振栋 陈传昌 《大地测量与地球动力学》 CSCD 2004年第2期58-63,共6页
水口水库建成蓄水后诱发了频繁的地震活动 ,至今延续时间已超过 10年 ,目前还在继续活动。其间共诱发地震 12 0 0余次 ,其中最大震级是 1996年 4月 2 1日发生的ML4 .1地震。根据诱发地震序列资料 ,对水口水库诱发地震的区域地质构造背... 水口水库建成蓄水后诱发了频繁的地震活动 ,至今延续时间已超过 10年 ,目前还在继续活动。其间共诱发地震 12 0 0余次 ,其中最大震级是 1996年 4月 2 1日发生的ML4 .1地震。根据诱发地震序列资料 ,对水口水库诱发地震的区域地质构造背景、时空特征、地震序列性质。 展开更多
关键词 水口水库 诱发地震 地质构造 地震序列性质 地震活动趋势
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Micro-heterogeneity of Storage Glutelin in Rice Seed 被引量:4
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作者 曲乐庆 魏晓丽 +3 位作者 佐藤光 小川雅广 熊丸敏博 贾旭 《Acta Botanica Sinica》 CSCD 2001年第8期815-820,共6页
The storage glutelin in rice ( Oryza sativa L.) seeds could be separated at least into more than 13 acidic and 19 basic polypeptides by two dimensional electrophoresis. Rice glutelin might be mainly controlled by abou... The storage glutelin in rice ( Oryza sativa L.) seeds could be separated at least into more than 13 acidic and 19 basic polypeptides by two dimensional electrophoresis. Rice glutelin might be mainly controlled by about six major genes according to the expression of glutelin polypeptides. The acidic polypeptide of glutelin could be clearly separated into two groups by peptide mapping and N-terminal amino acid sequence analysis. These two groups were just in accord with the GluA and GluB subfamilies exactly. 展开更多
关键词 rice glutelin two-dimensional electrophoresis N-terminal amino acid sequence
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EST-SSR Marker-based Genetic Diversity Analysis of Rhododendron simsii Germplasm in Guifeng Mountain 被引量:2
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作者 李志良 程呈 +3 位作者 张光望 方元平 金卫斌 王书珍 《Agricultural Science & Technology》 CAS 2016年第5期1073-1076,共4页
Rhododendron simsii(Ericaeae:Rhododendron) has high ornamental value and ecological value.In this study,7 pairs of novel EST-SSR markers were developed from the genomic sequence of R.simsii,and they were used to in... Rhododendron simsii(Ericaeae:Rhododendron) has high ornamental value and ecological value.In this study,7 pairs of novel EST-SSR markers were developed from the genomic sequence of R.simsii,and they were used to investigate the genetic diversity of 32 natural R.simsii samples from Guifeng Mountain,Hubei Province.Results showed that a total of 31 polymorphic bands were amplified with allele number per locus of 4.43.Mean values of heterozygosity(Ho) and expected heterozygosity(He) were 0.679 58 and 0.723 14,respectively.This research will not only enrich the existing SSR database,but also lay a foundation for subsequent studies about molecular marker-assisted breeding,genetic diversity analysis,genetic structure analysis and phylogenetic analysis. 展开更多
关键词 Rhododendron simsii MICROSATELLITE Expressed sequence tag Genetic diversity Germplasm resource
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Analysis of a Class of Logical Functions over Galois and Z_m Rings 被引量:1
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作者 陈卫红 曾洪杰 《Chinese Quarterly Journal of Mathematics》 CSCD 2002年第4期105-110,共6页
In this paper, the author analyzed some cryptographic properties of a class of logical functions, f(x,y)=(q(x),...,q(x))·y+h(x),over Galois rings and residue rings, presented the relationship between the characte... In this paper, the author analyzed some cryptographic properties of a class of logical functions, f(x,y)=(q(x),...,q(x))·y+h(x),over Galois rings and residue rings, presented the relationship between the character spectrum of f(x,y) and the character speetrum of q(x),h(x) and the relationship between the cryptographic properties of f(x,y) and the cryptographic properties of h(x). 展开更多
关键词 logical function character spectrum cryptographic properties
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Characteristic atom sequences of Nb-Mo alloys system in BCC structure and properties of disordered alloys
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作者 彭红建 武青 +1 位作者 李小波 谢佑卿 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第5期1190-1196,共7页
Comprehensively considering energy, volume and electronic structure of alloys, the ninth equation was determined as the interaction function of Nb-Mo alloys system in BCC structure on the basis of idea of systematic s... Comprehensively considering energy, volume and electronic structure of alloys, the ninth equation was determined as the interaction function of Nb-Mo alloys system in BCC structure on the basis of idea of systematic science of alloys, experimental lattice constants and heats of formation of disordered Nb(1-x)Mox alloys. The structural parameters and properties of Nb and Mo characteristic atoms sequences and corresponding characteristic crystals sequences were determined in Nb-Mo alloys system. The electronic structure and physical properties of disordered Nb(1-x)Mox alloys system were calculated according to concentration of characteristic atoms of disordered alloys. The change trend of physical properties is the same as that of electronic structure. 展开更多
关键词 Nb-Mo alloys system characteristic atom sequences disordered alloys properties
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Tikhonov泛函可分近似罚项的灵敏性分析
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作者 王雪娇 季光明 钱伟婷 《中国科技论文》 CAS 北大核心 2016年第5期524-526,共3页
为了研究Tikhonov泛函可分近似罚项的灵敏性,根据光滑罚项近似Tikhonov泛函中不光滑罚项的研究,基于经典的Tikhonov泛函,在一定的假设条件下,利用可分Banach空间的p框架和序列Kadec-Klee性质(K-K性质)证明其可分近似罚项的灵敏性。结果... 为了研究Tikhonov泛函可分近似罚项的灵敏性,根据光滑罚项近似Tikhonov泛函中不光滑罚项的研究,基于经典的Tikhonov泛函,在一定的假设条件下,利用可分Banach空间的p框架和序列Kadec-Klee性质(K-K性质)证明其可分近似罚项的灵敏性。结果表明可分近似泛函的最小值收敛于原泛函的最小值。 展开更多
关键词 可分BANACH空间 p框架 序列Kadec-Klee性质 灵敏性
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The U-property of Orlicz Sequence Spaces 被引量:1
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作者 王廷辅 计东海 赵亮 《Chinese Quarterly Journal of Mathematics》 CSCD 1997年第4期55-62, ,共8页
For Orlicz sequence spaces,the criteria of U-property are given.
关键词 Orlicz sequene spaces the U-property
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A New Class of Generalized Landau Linear Positive Operator Sequence and Its Properties of Approximation
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作者 陈湛本 石济民 《Chinese Quarterly Journal of Mathematics》 CSCD 1998年第1期29-43, ,共15页
In this paper two sequences of generalized Landau linear positive operators are introduced. They can be applied in approximating continuous functions with arbitrary growth order, defined on a finite interval or the wh... In this paper two sequences of generalized Landau linear positive operators are introduced. They can be applied in approximating continuous functions with arbitrary growth order, defined on a finite interval or the whole real axis. The properties of approximation are studied and their asymptotic formulae are presented. These results show that their degrees of approximation are the best among existing operator sequences of Landau type, for example, their degrees of approximation for C 2[0, 1] are O(1/n 2) but corresponding degree of ordinary Landau operators are only O(1/n). 展开更多
关键词 generalized Landau linear positive operators degree of approximation asymptotic formula
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Bochner-Orlicz sequence spaces with λ property
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作者 石忠锐 葛双印 《Journal of Shanghai University(English Edition)》 CAS 2008年第2期95-96,共2页
The sufficient and necessary conditions of the Bochner-Orlicz sequence spaces equipped with the Luxemburg norm, which have λ property, are given. The result shows, which is not as usual, that the λ property of the B... The sufficient and necessary conditions of the Bochner-Orlicz sequence spaces equipped with the Luxemburg norm, which have λ property, are given. The result shows, which is not as usual, that the λ property of the Bochner-Orlicz sequence spaces can not be lift from X. 展开更多
关键词 λ property Bochner-Orlicz sequence space Luxemburg norm.
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The Effect of Chlorine Dioxide Charges in Chlorine Dioxide-Alkaline Extraction-Chlorine Dioxide (DED) Sequence on Optical Properties of Kraft Pulp of Eucalyptus camaldulensis
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作者 Hossein Resalati Sara Kajforush Ali Ghasemian Ahmadreza Saraeyan 《Journal of Environmental Science and Engineering(A)》 2012年第2期181-186,共6页
Hardwoods are important raw material for making pulp and paper products. Eucalyptus camaldulensis is a fast-growing hardwood species with a wide distribution in Iran and can be introduced as appropriatematerial to com... Hardwoods are important raw material for making pulp and paper products. Eucalyptus camaldulensis is a fast-growing hardwood species with a wide distribution in Iran and can be introduced as appropriatematerial to compensate the wood shortages of the natural forest. Kraft pulping was performed under different cooking conditions and, based on the relations of pulp yield and kappa number, bleachable kraft pulp at screened yield of 43.3% and kappa number of 31.3 was selected for DED (Chlorine Dioxide-Alkaline Extraction-Chlorine Dioxide) bleaching and its bleachability was studied at different kappa factor in D~ stage. The results indicated that the bleachable kraft pulp from this species has high kappa number at acceptable screened yield and to complete the delignification in the bleaching process, higher kappa factor may be needed in DED bleaching sequence. The main reduction in final kappa number and yield loss were observed at kappa factor level of 0.2 but by further increase in kappa factor up to 0.4, more development were observed in optical properties but at lower opacity. 展开更多
关键词 KRAFT Kappa factor Eucalyptus camaldulensis DED bleaching.
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Reduced Expression of Programmed Cell Death 5 Protein in Tissue of Human Prostate Cancer 被引量:15
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作者 Yue-jun Du Lin Xiong +2 位作者 Yan Lou Wan-long Tan Shao-bin Zheng 《Chinese Medical Sciences Journal》 CAS CSCD 2009年第4期241-245,共5页
Objective To investigate the expression of programmed cell death 5 (PDCD5) in tissues of normal human prostate (NP), benign prostatic hyperplasia (BPH), and prostate cancer (PCa) in order to assess the clinica... Objective To investigate the expression of programmed cell death 5 (PDCD5) in tissues of normal human prostate (NP), benign prostatic hyperplasia (BPH), and prostate cancer (PCa) in order to assess the clinical role of PDCD5 in PCa. Methods PDCD5 expression was determined by EnVision immunohistochemical staining in forma-lin-fixed and paraffin-embedded specimens obtained from 12 subjects with NP, 22 with BPH, and 22 with PCa. In addition, PCa cases were classified as low/middle-risk (Gleason sumS7) and high-risk (Gleason sum〉7) on the basis of Gleason grade. Positive expression rates and intensity of PDCD5 protein were observed under light microscope and analyzed with computer imaging technique. Expression of PDCD5 was compared among different prostatic tissues. Results The expression of PDCD5 was significantly lower in tissue of PCa than in tissues of NP and BPH (P〈0.01). However, there was no significant difference in PDCD5 expression between tissues of NP and BPH. In addition, the expression of PDCD5 was further downregulated with the increase of Gleason sum in PCa. Conclusions By downregulating apoptosis, low PDCD5 expression may play an important role in the occurrence and development of PCa. PDCD5 is supposed to have a potential clinical value to be a new predictor of progression and target of gene therapy in PCa. 展开更多
关键词 prostate cancer APOPTOSIS programmed cell death 5
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AVLINK: Robust Clustering Algorithm based on Average Link Applied to Protein Sequence Analysis 被引量:1
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作者 Mohamed A. Mahfouz 《Journal of Mathematics and System Science》 2016年第5期205-214,共10页
Robust Clustering methods are aimed at avoiding unsatisfactory results resulting from the presence of certain amount of outlying observations in the input data of many practical applications such as biological sequenc... Robust Clustering methods are aimed at avoiding unsatisfactory results resulting from the presence of certain amount of outlying observations in the input data of many practical applications such as biological sequences analysis or gene expressions analysis. This paper presents a fuzzy clustering algorithm based on average link and possibilistic clustering paradigm termed as AVLINK. It minimizes the average dissimilarity between pairs of patterns within the same cluster and at the same time the size of a cluster is maximized by computing the zeros of the derivative of proposed objective function. AVLINK along with the proposed initialization procedure show a high outliers rejection capability as it makes their membership very low furthermore it does not requires the number of clusters to be known in advance and it can discover clusters of non convex shape. The effectiveness and robustness of the proposed algorithms have been demonstrated on different types of protein data sets. 展开更多
关键词 Data Mining Fuzzy Clustering Relational Clustering Hierarchical Clustering Bioinformatics.
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