期刊文献+
共找到428篇文章
< 1 2 22 >
每页显示 20 50 100
基于H.225.0Annex G协议的域间路由寻址策略
1
作者 李锐 喻占武 《通信学报》 EI CSCD 北大核心 2008年第7期69-74,共6页
针对多媒体通信中域间访问效率较低的问题,基于H.225Annex G协议,研究ITU-T E.164码建议电话号码编码方式和DNS域名解析方法,采用地址驱动的路由寻址机制,提出一种基于准同域的域间动态路由寻址策略(qhAD策略)。此策略在上下级管理域之... 针对多媒体通信中域间访问效率较低的问题,基于H.225Annex G协议,研究ITU-T E.164码建议电话号码编码方式和DNS域名解析方法,采用地址驱动的路由寻址机制,提出一种基于准同域的域间动态路由寻址策略(qhAD策略)。此策略在上下级管理域之间使用H.225Annex G中的描述符分发类信令交换域地址模板以获取实时的域间地址信息,使各级管理域能保存一个与祖先信息有关的路由地址表,呼叫发起时向最近准同域级的祖先直接请求地址解析,从而使"准同域"类的呼叫路由寻址请求在一个相对小的域内得以解决。通过对策略延迟时间性能分析和模型仿真研究,得出qhAD寻址策略可以大大减少寻址响应的延迟,减少路由寻址中对信道的占用,减轻通信信道的负担。 展开更多
关键词 多媒体通信 寻址 管理域 域间路由 H.225 annex G协议
下载PDF
Canadian West Exploitation in the Context of American Threat of Annexation
2
作者 李圣恩 《海外英语》 2011年第10X期386-387,共2页
America had been attempting to annex Canadian West and posed a threat to the security of the fledgling country. Therefore the antipathy towards America as well as independent-nation complex of Canadians drove Canadian... America had been attempting to annex Canadian West and posed a threat to the security of the fledgling country. Therefore the antipathy towards America as well as independent-nation complex of Canadians drove Canadian government to incorporate the west exploitation into the national strategy of creating an independent country. Canadian west exploitation thus took on some distinctiveness. 展开更多
关键词 annexATION WEST EXPLOITATION strategy
下载PDF
G.729 Annex B 简介 被引量:2
3
作者 杨俊杰 黎福海 《电声技术》 北大核心 2002年第9期10-12,共3页
介绍了G.729的静音压缩算法G.729AnnexB,并讨论了它与其它G.729派生标准配合使用的问题。实验证明,无论在有噪声还是无噪声的条件下,G.729AnnexB与G.729AnnexA配合使用的性能都不低于G.729AnnexA的性能。
关键词 G.729annex B 静音检测 不连续传送 舒适噪声产生 语音信号
下载PDF
基于H.225.0AnnexG协议的层次化域间通信技术研究
4
作者 胡春香 李锐 喻占武 《计算机应用》 CSCD 北大核心 2006年第4期958-960,968,共4页
目前H.323网络域间通信存在认证授权不完善,效率低等问题。提出了一种基于H.225.0AnnexG协议的层次化管理域间通信体系模型、地址描述符及其域间通信流程的具体实现方式。这种方案采用管理域(AD)中边界单元(BE)与父网守(GK)绑定增强域... 目前H.323网络域间通信存在认证授权不完善,效率低等问题。提出了一种基于H.225.0AnnexG协议的层次化管理域间通信体系模型、地址描述符及其域间通信流程的具体实现方式。这种方案采用管理域(AD)中边界单元(BE)与父网守(GK)绑定增强域间的呼叫认证和管理,具有适合视讯网络域间通信管理、减少网络资源浪费及通信效率高的特点。 展开更多
关键词 多媒体通信 域间通信 管理域 H.225.0 annex G 边界单元 网守
下载PDF
ANNEXATION OF TWO KINDS OF SOLUTION IN BINARY METALLIC MELTS 被引量:2
5
作者 J.Zhang 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2004年第2期131-138,共8页
After investigation on the thermodynamic properties of a small number of binarymetallic melts, the structural units of which cannot be wholly determined by the cor-responding phase diagrams, it was found that they can... After investigation on the thermodynamic properties of a small number of binarymetallic melts, the structural units of which cannot be wholly determined by the cor-responding phase diagrams, it was found that they can be determined by the principleof annexation of two kinds of solutions in binary metallic melts. According to theprinciple of annexation, calculating models of mass action concentrations for severalbinary metallic melts have been formulated. The calculated results agree well withpractice, showing that this principle is a reliable basis for determination of the struc-tural units for some binary metallic melts. 展开更多
关键词 metallic melt annexATION ACTIVITY mass action concentration
下载PDF
Application of the annexation principle to the study of thermodynamic properties of ternary metallic melts In-Pb-Ag and In-Bi-Sb 被引量:2
6
作者 ZHANG JianMetallurgical Engineering school.University of Science and Technology Beijing, Beijing 100083, China 《Rare Metals》 SCIE EI CAS CSCD 2002年第2期142-151,共10页
Based on the phase diagrams, measured activities an the annexationprinciple, the calculating models of mass action concentrations forin-Pb-Ag and In-Bi-Sb ternary metallic melts have been formulated.The results of cal... Based on the phase diagrams, measured activities an the annexationprinciple, the calculating models of mass action concentrations forin-Pb-Ag and In-Bi-Sb ternary metallic melts have been formulated.The results of calculation both agree with practice, and obey the lawof mass action, showing that the models formulated can reflect thestructural reality of the corresponding melts and the annexationprinciple is applicable to the them. 展开更多
关键词 activity mass action concnetration th annexation principle In-PB-Ag
下载PDF
Study on “Village Relocation and Annexation” in the Village Planning of New Countryside Construction
7
作者 SUN Yang DAI Xiaofang 《Journal of Landscape Research》 2012年第10期21-23,共3页
Significance and theoretic foundation of "village relocation and annexation" in the planning of new countryside was elaborated. Planning schemes of New Pingdi and Xiangyunzhuang Village were analyzed from si... Significance and theoretic foundation of "village relocation and annexation" in the planning of new countryside was elaborated. Planning schemes of New Pingdi and Xiangyunzhuang Village were analyzed from six perspectives: selection of new village site, planning structure, planned road, architectural layout, public facilities and landscape design. It was then proposed that "village relocation and annexation" could not only save investment in public infrastructure, but also improve land use efficiency, thus it was an important approach of optimizing distribution of land resources. 展开更多
关键词 "Village RELOCATION and annexation" NEW Pingdi and Xiangyunzhuang VILLAGE PLANNING
下载PDF
Application of annexation principle to the study of thermodynamic properties of Ag-Bi-In metallic melts
8
作者 Jian ZhangMetallurgy school, University of Science and Technology Beijing, Beijing 100083, China 《Journal of University of Science and Technology Beijing》 CSCD 2003年第1期18-20,共3页
Based on the measured activities, the phase diagrams and the annexation principle, the calculating models of mass action concentrations for Ag-Bi and Ag-Bi-In melts have been formulated. The calculated results agree w... Based on the measured activities, the phase diagrams and the annexation principle, the calculating models of mass action concentrations for Ag-Bi and Ag-Bi-In melts have been formulated. The calculated results agree with practice and obey the mass action law, showing that the models formulated can reflect the structural characteristics of both melts. Meanwhile, it confirms that annexation principle is applicable to the Ag-Bi-In metallic melts. The melts involving eulectic which give rise to phase separation, and in which activities exhibit positive deviation from Raoult's law is the basic cause of melts transforming from homogeneous to heterogeneous ones. 展开更多
关键词 the mass action law annexation principle two phase melts activity mass action concentration
下载PDF
Application of annexation principle to the study of thermodynamic properties of Ag-Bi-In metallic melts
9
作者 Jian ZhangMetallurgy school, University of Science and Technology Beijing, Beijing 100083, China 《北京科技大学学报》 EI CAS CSCD 北大核心 2003年第2期109-109,共1页
Based on the measured activities,the phase diagrams and the annexation principle,the calculating models of mass action concentrations for Ag-Bi and Ag-Bi-In melts have been formulated.The calculated results agree with... Based on the measured activities,the phase diagrams and the annexation principle,the calculating models of mass action concentrations for Ag-Bi and Ag-Bi-In melts have been formulated.The calculated results agree with practice and obey the mass action law,showing that the models formulated can reflect the structural characteristics of both melts.Meanwhile,it confirms that annexation principle is applicable to the Ag-Bi-In metallic melts.The melts involving eutectic which give rise to phase separation,and in which activcities exhibit positive deviation from Raoult's law is the basic cause of melts transforming from homogeneous to heterogeneous ones. 展开更多
关键词 Ag-Bi-In金属融体 热力学性质 合并原则 计算模型
下载PDF
Application of annexation principle of thermodynamic property of In-Pb-Sb and In-Bi-Pb melts
10
作者 张鉴 《中国有色金属学会会刊:英文版》 CSCD 2002年第1期120-126,共7页
Based on the principle of annexation and phase diagrams, the structural units of In Pb Sb and In Bi Pb melts were determined, and their calculating models of mass action concentrations were formulated. Calculated resu... Based on the principle of annexation and phase diagrams, the structural units of In Pb Sb and In Bi Pb melts were determined, and their calculating models of mass action concentrations were formulated. Calculated results agree well with practical values, which in turn show that the models deduced can reflect the structural realities of corresponding melts and the principle of annexation is applicable not only to some binary metallic melts, but also to ternary metallic melts. 展开更多
关键词 合并原则 两相融化 热力学 In-Pb-Sb In-Bi-Pb 合金融化
下载PDF
北魏均田制与土地兼并问题再探
11
作者 严耀中 《史学集刊》 CSSCI 北大核心 2024年第5期97-107,共11页
北魏均田制包含着同一等级内之均平和等级之间分田不均的两面性,这体现着以权力为背景的土地之身份占有权,也是土地被多层次兼有在制度上之反映。其结果之一是导致大土地合法占有的同时,在一定程度上抑制了土地兼并。谴责土地兼并,在历... 北魏均田制包含着同一等级内之均平和等级之间分田不均的两面性,这体现着以权力为背景的土地之身份占有权,也是土地被多层次兼有在制度上之反映。其结果之一是导致大土地合法占有的同时,在一定程度上抑制了土地兼并。谴责土地兼并,在历史上一向被视为政治正确,也令均田制往往获得赞扬。其实,均田制的推行,一方面容纳了以权力为后盾的直接或间接占有大土地现象在中国的延续,另一方面也阻碍了通过生产要素流转而使资源得到优化配置,并加重了行政操作成本。因此,均田制是一个效费比很低的制度。由此亦可发现其中一些所谓的“地主”往往只是一种权位所附带的身份。 展开更多
关键词 北魏 均田制 土地兼并
下载PDF
检验检测机构能力扩项申请内容概述 被引量:3
12
作者 田润 刘婷 +1 位作者 习亚超 闫皙 《中国标准化》 2024年第2期141-145,共5页
资质认定能力扩项是检验检测机构较为多见的业务申请形式之一,规范化的管理平台网上申请已成为常态化的操作方式。本文对检验检测机构能力扩项需求及其原因进行了分析,以河北省环境检测机构为例简要介绍了能力扩项申请的初步填写内容和... 资质认定能力扩项是检验检测机构较为多见的业务申请形式之一,规范化的管理平台网上申请已成为常态化的操作方式。本文对检验检测机构能力扩项需求及其原因进行了分析,以河北省环境检测机构为例简要介绍了能力扩项申请的初步填写内容和能力扩项申请材料的附件,较为详细地对申请材料附件模块进行了具体分析,给出了准备能力扩项申请材料时需要注意的事项,对检验检测机构进行资质认定能力扩项申请及相关工作具有参考作用。 展开更多
关键词 检验检测机构 资质认定 能力扩项 申请附件 环境检测
下载PDF
The influence of Annexin32,a new Ca^(2+)-dependent phospholipid-binding protein,on coagulation time and thrombosis 被引量:6
13
作者 张毅 陈蕊雯 孙树汉 《Science China(Life Sciences)》 SCIE CAS 2002年第2期186-190,共5页
The pharmacodynamics of Annexin32, a new Ca2+-dependent phospholipid-binding protein, was studied by measuring coagulation time in rabbits and venous thrombosis in rabbits and rats. Rabbits and rats were given Annexin... The pharmacodynamics of Annexin32, a new Ca2+-dependent phospholipid-binding protein, was studied by measuring coagulation time in rabbits and venous thrombosis in rabbits and rats. Rabbits and rats were given Annexin32 by intravenous administration. Then Kaolin partial thromboplastin time (KPTT), thrombosis in vitro and in vivo were assayed. The results showed that KPTT of rabbits was prolonged (p < 0.01), and the length and weight of thrombus in vitro were reduced (p < 0.01) after administration of Annexin32 at 1 mg/kg. It also inhibited thrombosis in vivo and reduced the weight of venous thrombus significantly in rats (p < 0.01). All these results suggested that Annexin32 possesses the characteristic of antithrombotic effect and fewer side effects on coagulation time. 展开更多
关键词 annexing coagulation time thrombosis.
原文传递
两宋时期建筑形体组合中的挟屋初探
14
作者 周妍 李路珂 《建筑史学刊》 2024年第3期136-152,共17页
立足于文献、实物、图像,纵向梳理挟屋建筑形体组合相关词汇的源流和发展,横向探讨两宋时期挟屋的形态结构特征和空间类型,定位、阐释两宋时期挟屋这一形体组合类型的创新性、丰富性与特殊性。
关键词 两宋时期 挟屋 形体组合 附属建筑 建筑形制
下载PDF
医疗器械独立软件现场核查问题分析及若干建议
15
作者 杨义强 范之劲 郭术廷 《中国医疗器械杂志》 2024年第3期346-351,共6页
近年,随着政策激励以及生物医药产业迅速发展,上海市医疗器械独立软件注册申报数量持续增加,该研究对2020—2023年上海市医疗器械独立软件现场核查中所发现的规范不合格项进行了汇总统计,结果表明近70%为软件开发过程的问题。通过深入分... 近年,随着政策激励以及生物医药产业迅速发展,上海市医疗器械独立软件注册申报数量持续增加,该研究对2020—2023年上海市医疗器械独立软件现场核查中所发现的规范不合格项进行了汇总统计,结果表明近70%为软件开发过程的问题。通过深入分析,针对软件需求、软件设计、软件测试、软件缺陷管理以及软件配置管理等问题出现最多的5个环节,结合软件开发特点,提出了相应的应对措施。这些建议措施对于医疗器械软件开发及质控人员、技术审评核查人员具有一定的参考意义。 展开更多
关键词 医疗器械独立软件 软件生存周期 生产质量管理规范附录独立软件 现场核查
下载PDF
鸿沟与“大胜并莒”初探
16
作者 孙长生 韩明林 《孙子研究》 2024年第1期99-106,共8页
国家战略一定是围绕着国家长久的重大的根本的利益制定的,而保障国家战略的实施,一定是倾其所有全力而为。鸿沟这条人工运河的连通,是魏国“大胜并莒”战略实施的最重要的手段之一。鸿沟连通从今河南的荥阳可直达今江苏新沂的骆马湖,同... 国家战略一定是围绕着国家长久的重大的根本的利益制定的,而保障国家战略的实施,一定是倾其所有全力而为。鸿沟这条人工运河的连通,是魏国“大胜并莒”战略实施的最重要的手段之一。鸿沟连通从今河南的荥阳可直达今江苏新沂的骆马湖,同时还有两条向南的水系河流,使魏国向东、向南拓展都有了最基础的保障。 展开更多
关键词 鸿沟 大胜并莒 马陵之战
下载PDF
关于附建式人防地下室给排水设计的探讨
17
作者 方静雅 《科学技术创新》 2024年第14期119-122,共4页
人防地下室是城市建筑体系中不可或缺的一环,用于增强战争时期和应急情况下城市的自我保护能力。其功能形式多样,防护能力和效果也各不相同。本文将以附建式人防地下室给排水设计作为研究对象,通过引用相关规范条文和设计实例,深入研究... 人防地下室是城市建筑体系中不可或缺的一环,用于增强战争时期和应急情况下城市的自我保护能力。其功能形式多样,防护能力和效果也各不相同。本文将以附建式人防地下室给排水设计作为研究对象,通过引用相关规范条文和设计实例,深入研究人防地下室给排水设计的关键技术和实际应用。 展开更多
关键词 给排水设计 附建式人防地下室 设计实例 规范引用
下载PDF
浅谈合肥地铁6号线怀宁路站四小件融合设计
18
作者 雷鑫 《铁道勘测与设计》 2024年第1期43-45,共3页
以合肥地铁6号线怀宁路站四小件设计为例,从建筑整合、景观融合、交通接驳融合等方面分析地铁四小件融合设计要点,提出融合设计中的设计思路。
关键词 怀宁路站 地铁四小件 融合设计
下载PDF
NSFC Signs New Agreement Annex with BRFFR
19
《Science Foundation in China》 CAS 2017年第3期3-,共1页
On July 3,2017,NSFC president Yang Wei and Prof.Sergey Gaponenko,chairman of the scientific council of the Belarusian Republican Foundation for Fundamental Research(BRFFR)signed the Annex to the Agreement on Cooperati... On July 3,2017,NSFC president Yang Wei and Prof.Sergey Gaponenko,chairman of the scientific council of the Belarusian Republican Foundation for Fundamental Research(BRFFR)signed the Annex to the Agreement on Cooperation between the National Natural Science Foundation of China and the Belarusian Republican Foundation for Fundamental Researchin Beijing. 展开更多
关键词 NSFC Signs New Agreement annex with BRFFR
原文传递
从多元走向一体化进程的样本——“秦并巴蜀”的历史意义 被引量:1
20
作者 何一民 《成都大学学报(社会科学版)》 2023年第6期43-53,共11页
公元前316年,秦国利用巴、蜀两国内斗,趁机出兵,并以势如破竹之势,打败蜀王所率之兵。秦灭蜀之后,又挥师灭巴,从而将巴蜀地区纳入秦国版图。秦并巴蜀事件在战国时期与其他灭国战争的意义有所不同,对中国历史的发展产生了重要的影响,关... 公元前316年,秦国利用巴、蜀两国内斗,趁机出兵,并以势如破竹之势,打败蜀王所率之兵。秦灭蜀之后,又挥师灭巴,从而将巴蜀地区纳入秦国版图。秦并巴蜀事件在战国时期与其他灭国战争的意义有所不同,对中国历史的发展产生了重要的影响,关键在于为秦统一中国奠定了重要基础,成为秦灭六国之先声。战国时期,建立大一统多民族国家是历史发展的必然选择,一是中华大地的自然地理环境是推动大一统多民族国家建立的重要条件;二是大一统思想的孕育和形成构成了大一统多民族国家建立的思想基础,而政治、经济、文化的发展也推动统一国家的建立。秦并巴蜀,顺应了历史发展的大趋势,将中国西南地区整合到统一的版图之中,也促进了长江上游巴蜀地区经济、社会的进一步繁荣发展,开创了天府之国的新气象,同时也推动了巴蜀文明与华夏文明的深度融合,形成了一种新的区域文化体系——天府文化。 展开更多
关键词 秦并巴蜀 多元 一体化 大一统 天府文化
下载PDF
上一页 1 2 22 下一页 到第
使用帮助 返回顶部