根据气象科技管理工作的实际需要,综合运用软件工程的观点、方法分析了气象科技管理信息系统的需求,完成了系统功能模块设计、逻辑设计,开发基于B/S(Browser/Server)模式、运用JAVA、JSP(Java Server Page)、JFree Chart、POI等技术实...根据气象科技管理工作的实际需要,综合运用软件工程的观点、方法分析了气象科技管理信息系统的需求,完成了系统功能模块设计、逻辑设计,开发基于B/S(Browser/Server)模式、运用JAVA、JSP(Java Server Page)、JFree Chart、POI等技术实现的气象科技管理信息系统(简称HNMSTMIS),实现了气象科技信息资源的共享和气象科技管理业务的网络运行,具有网上在线申报、成果评分、信息检索、统计分析、上传下载、图表显示等功能,建成了精简、高效的网上管理运作模式和气象科技工作流程管理平台。该系统不仅在内部实现了信息共享和业务网络化管理,而且通过Web实现与外界的信息交换,为各类用户迅速提供了全面、准确的信息服务,具有完善的服务功能、较强的实用性和可操作性。该系统已在河南省气象科技管理工作中应用,并已推广到云南省气象局等部门,取得了较明显的社会和经济效益。展开更多
In the present paper, a new difference matrix via difference operator D is introduced. Let x = （xk） be a sequence of real numbers, then the difference operatorD is defined by D（x）n =∑kn=0（-1）k（n-kn）xk,where ...In the present paper, a new difference matrix via difference operator D is introduced. Let x = （xk） be a sequence of real numbers, then the difference operatorD is defined by D（x）n =∑kn=0（-1）k（n-kn）xk,where n = 0,1,2,3,.... Several interestingproperties of the new operator D are discussed.展开更多
A new 10-hydroxyl anthrone glycoside, 1, 8, 10 - trihydroxyl-1ObDglucopyrano- syl-3-methyl-10- C (S) b D- glucopyranosyl-anthrone-9 1 was isolated from the stem of Cassia siamea Lam. The structure was elucidated by...A new 10-hydroxyl anthrone glycoside, 1, 8, 10 - trihydroxyl-1ObDglucopyrano- syl-3-methyl-10- C (S) b D- glucopyranosyl-anthrone-9 1 was isolated from the stem of Cassia siamea Lam. The structure was elucidated by spectral evidences, especially by 2 D techniques.展开更多
Reactions of the 6-hydroxy-thiopyrano[3,4-c]pyridine-5-carbonitrile derivative 1 withα-halo-carbonyl compounds gave the ortho-substituted intermediates 2a-c which were converted into furo[2,3-b]thiopyrano[4,3-d]pyrid...Reactions of the 6-hydroxy-thiopyrano[3,4-c]pyridine-5-carbonitrile derivative 1 withα-halo-carbonyl compounds gave the ortho-substituted intermediates 2a-c which were converted into furo[2,3-b]thiopyrano[4,3-d]pyridines 3a-c by fusion of a furan moiety under basic conditions.Further cyclization of 3a-c led to a fusion of a pyrimidine ring,yielding the tetracyclic products 6,7 and 8.In addition,condensation of 6 with various aromatic aldehydes afforded the corresponding imines 9a,b.Mannich reaction of 7 gave products 10a,b.展开更多
文摘根据气象科技管理工作的实际需要,综合运用软件工程的观点、方法分析了气象科技管理信息系统的需求,完成了系统功能模块设计、逻辑设计,开发基于B/S(Browser/Server)模式、运用JAVA、JSP(Java Server Page)、JFree Chart、POI等技术实现的气象科技管理信息系统(简称HNMSTMIS),实现了气象科技信息资源的共享和气象科技管理业务的网络运行,具有网上在线申报、成果评分、信息检索、统计分析、上传下载、图表显示等功能,建成了精简、高效的网上管理运作模式和气象科技工作流程管理平台。该系统不仅在内部实现了信息共享和业务网络化管理,而且通过Web实现与外界的信息交换,为各类用户迅速提供了全面、准确的信息服务,具有完善的服务功能、较强的实用性和可操作性。该系统已在河南省气象科技管理工作中应用,并已推广到云南省气象局等部门,取得了较明显的社会和经济效益。
文摘In the present paper, a new difference matrix via difference operator D is introduced. Let x = （xk） be a sequence of real numbers, then the difference operatorD is defined by D（x）n =∑kn=0（-1）k（n-kn）xk,where n = 0,1,2,3,.... Several interestingproperties of the new operator D are discussed.
文摘A new 10-hydroxyl anthrone glycoside, 1, 8, 10 - trihydroxyl-1ObDglucopyrano- syl-3-methyl-10- C (S) b D- glucopyranosyl-anthrone-9 1 was isolated from the stem of Cassia siamea Lam. The structure was elucidated by spectral evidences, especially by 2 D techniques.
文摘Reactions of the 6-hydroxy-thiopyrano[3,4-c]pyridine-5-carbonitrile derivative 1 withα-halo-carbonyl compounds gave the ortho-substituted intermediates 2a-c which were converted into furo[2,3-b]thiopyrano[4,3-d]pyridines 3a-c by fusion of a furan moiety under basic conditions.Further cyclization of 3a-c led to a fusion of a pyrimidine ring,yielding the tetracyclic products 6,7 and 8.In addition,condensation of 6 with various aromatic aldehydes afforded the corresponding imines 9a,b.Mannich reaction of 7 gave products 10a,b.
