Generalized strictly diagonally dominant matrices play a wide and important role in computational mathematics, mathematical physics, theory of dynamical systems, etc.But it is difficult to judge a matrix is or not gen...Generalized strictly diagonally dominant matrices play a wide and important role in computational mathematics, mathematical physics, theory of dynamical systems, etc.But it is difficult to judge a matrix is or not generalized strictly diagonally dominant matrix.In this paper, by using the properties of α-chain diagonally dominant matrix, we obtain new criteria for judging generalized strictly diagonally dominant matrix, which enlarge the identification range.展开更多
AIM:To ascertain whether the Prague circumferential(C) length and maximal(M) length criteria for grading the extent of Barrett's esophagus can be applied prior to its widespread application in South Korea.METHODS:...AIM:To ascertain whether the Prague circumferential(C) length and maximal(M) length criteria for grading the extent of Barrett's esophagus can be applied prior to its widespread application in South Korea.METHODS:Two hundred and thirteen consecutive cases with endoscopic columnar-lined esophagus(CLE) were included and classified according to the Prague C and M criteria.RESULTS:Of 213 cases with CLE, the distribution of maximum CLE lengths was: 0.5-0.9 cm in 99 cases(46.5%); 1.0-1.4 cm in 63 cases(29.6%); 1.5-1.9 cm in 15 cases(7.0%); 2.0-2.4 cm in 14 cases(6.6%); 2.5-2.9 cm in 1 case(0.5%); and 7.0 cm in 1 case(0.5%). Twenty cases(9.4%) had columnar islands alone. Two hundred and eight cases(97.7%) lacked the circumferential CLE component(C0Mx). Columnar islands were found in 70 cases(32.9%), of which 20 cases(9.4%) had columnar islands alone.CONCLUSION:In regions where most CLE patients display short or ultrashort tongue-like appearance, more detailed descriptions of CLE's in < 1.0 cm lengths and columnar islands, as well as avoidance of repeating the prefix "C0" need to be considered in parallel with the widespread application of the Prague system in South Korea.展开更多
Discovery showed that some of the rivers in Lee＇s Ferry area run on bedrocks while some are on the alluvium,based on geomorphology,the different kinds of channel characteristics can influence whether these rivers run...Discovery showed that some of the rivers in Lee＇s Ferry area run on bedrocks while some are on the alluvium,based on geomorphology,the different kinds of channel characteristics can influence whether these rivers run on bed rock or alluvium. By analyzing the velocity,discharge,width and depth,hydraulic radius and comparing the different channel characteristics of rivers in other areas with Lee＇s Ferry,it is observed that the channel discharge,velocity and the hydraulic radius play an important role in controlling the transport-limited river and these factors can be inferred to be correct even for all the river channels in Arizona.展开更多
利用简单重复序列分子标记技术对广西莪术(Curcuma kwangsiensis S.G.Lee et C.F.Liang)种质资源进行了遗传多样性分析。结果表明,筛选出的14对引物在50份广西莪术种质资源中共扩增出78个条带,其中60条呈现多态性,多态性比率为76.92%,...利用简单重复序列分子标记技术对广西莪术(Curcuma kwangsiensis S.G.Lee et C.F.Liang)种质资源进行了遗传多样性分析。结果表明,筛选出的14对引物在50份广西莪术种质资源中共扩增出78个条带,其中60条呈现多态性,多态性比率为76.92%,反映出广西莪术种质资源在分子水平上存在较大的差异;广西莪术不同种质资源间的差异主要由遗传因素决定,但也与环境因素有关。聚类结果将50份广西莪术种质资源分成2大类,揭示了它们之间的遗传差异,这为今后广西莪术优良品种的选育提供了依据。展开更多
基金Supported by the National Natural Science Foundation of China（71261010）
文摘Generalized strictly diagonally dominant matrices play a wide and important role in computational mathematics, mathematical physics, theory of dynamical systems, etc.But it is difficult to judge a matrix is or not generalized strictly diagonally dominant matrix.In this paper, by using the properties of α-chain diagonally dominant matrix, we obtain new criteria for judging generalized strictly diagonally dominant matrix, which enlarge the identification range.
文摘AIM:To ascertain whether the Prague circumferential(C) length and maximal(M) length criteria for grading the extent of Barrett's esophagus can be applied prior to its widespread application in South Korea.METHODS:Two hundred and thirteen consecutive cases with endoscopic columnar-lined esophagus(CLE) were included and classified according to the Prague C and M criteria.RESULTS:Of 213 cases with CLE, the distribution of maximum CLE lengths was: 0.5-0.9 cm in 99 cases(46.5%); 1.0-1.4 cm in 63 cases(29.6%); 1.5-1.9 cm in 15 cases(7.0%); 2.0-2.4 cm in 14 cases(6.6%); 2.5-2.9 cm in 1 case(0.5%); and 7.0 cm in 1 case(0.5%). Twenty cases(9.4%) had columnar islands alone. Two hundred and eight cases(97.7%) lacked the circumferential CLE component(C0Mx). Columnar islands were found in 70 cases(32.9%), of which 20 cases(9.4%) had columnar islands alone.CONCLUSION:In regions where most CLE patients display short or ultrashort tongue-like appearance, more detailed descriptions of CLE's in < 1.0 cm lengths and columnar islands, as well as avoidance of repeating the prefix "C0" need to be considered in parallel with the widespread application of the Prague system in South Korea.
基金Supported by the(2012)Sino-American 121 Program,Sino-American Cooperation on Higher Education and Professional Development,CCIEE
文摘Discovery showed that some of the rivers in Lee＇s Ferry area run on bedrocks while some are on the alluvium,based on geomorphology,the different kinds of channel characteristics can influence whether these rivers run on bed rock or alluvium. By analyzing the velocity,discharge,width and depth,hydraulic radius and comparing the different channel characteristics of rivers in other areas with Lee＇s Ferry,it is observed that the channel discharge,velocity and the hydraulic radius play an important role in controlling the transport-limited river and these factors can be inferred to be correct even for all the river channels in Arizona.
文摘利用简单重复序列分子标记技术对广西莪术(Curcuma kwangsiensis S.G.Lee et C.F.Liang)种质资源进行了遗传多样性分析。结果表明,筛选出的14对引物在50份广西莪术种质资源中共扩增出78个条带,其中60条呈现多态性,多态性比率为76.92%,反映出广西莪术种质资源在分子水平上存在较大的差异;广西莪术不同种质资源间的差异主要由遗传因素决定,但也与环境因素有关。聚类结果将50份广西莪术种质资源分成2大类,揭示了它们之间的遗传差异,这为今后广西莪术优良品种的选育提供了依据。
