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服务化战略与服务绩效——价值共创调节效应 被引量:14
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作者 康遥 陈菊红 +1 位作者 同世隆 姚树俊 《软科学》 CSSCI 北大核心 2016年第3期103-107,共5页
通过相关文献的梳理和理论的分析,研究了服务化战略对服务绩效的影响关系,并探讨价值共创的调节作用,构建了变量之间的概念模型和提出了研究假设,以我国服务化转型的制造企业为研究对象进行调研,运用多元线性回归的方法进行实证检验。... 通过相关文献的梳理和理论的分析,研究了服务化战略对服务绩效的影响关系,并探讨价值共创的调节作用,构建了变量之间的概念模型和提出了研究假设,以我国服务化转型的制造企业为研究对象进行调研,运用多元线性回归的方法进行实证检验。研究结果表明:服务化战略对服务绩效有正向影响;价值共创在服务化战略与服务绩效之间起到调节效应。 展开更多
关键词 服务化战略 价值共创 服务绩效 服务创新
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有机非线性光学材料DAST的合成和结构 被引量:4
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作者 吴棱 黄炳荣 +3 位作者 李兆基 康遥 覃业燕 姚元根 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 1999年第S1期407-407,共1页
关键词 有机非线性光学材料 国家重点实验室 结构化学 中国科学院 物质结构 非线性光学性能 DAST 重结晶 研究所 晶胞参数
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水合法合成樟脑副产油中异莰烷的分离和鉴定 被引量:1
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作者 吴棱 李兆基 +7 位作者 康遥 覃业燕 唐艳红 姚元根 钟庆有 林镜福 林晓清 王镇中 《应用化学》 CAS CSCD 北大核心 2001年第4期324-326,共3页
The by products from the dehydration of exo 2 camphanol in the camphor manufacture by hydration process contains two unknown components: A in 14% and B in 15%. The sample mixture containing 90% A and B with different ... The by products from the dehydration of exo 2 camphanol in the camphor manufacture by hydration process contains two unknown components: A in 14% and B in 15%. The sample mixture containing 90% A and B with different mass ratio(ca. 1∶1, 1∶2 and 1∶4) were collected by further fine fractional distillation with 60 plate number for spectroscopic characterization. The combined spectral results of GC, MS and 13 C NMR of the samples revealed that A is exo 2,2,3 trimethylbicyclo[2,2,1]heptane(exo isocamphane) and B is endo 2,2,3 trimethylbicyclo[2,2,1]heptane(endo isocomphane). 展开更多
关键词 樟脑副产油 分离 鉴定 水合法 合成 异莰烷
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服务化背景下制造企业服务嵌入构成要素研究 被引量:1
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作者 陈菊红 康遥 李小惠 《科技进步与对策》 CSSCI 北大核心 2015年第18期83-87,共5页
基于剧变市场环境下单纯地提供产品已经不能为现代企业赢得竞争优势的现实,服务嵌入(服务提供)正成为提高制造企业运作效率进而提升竞争优势的关键因素之一,在产品运作的基础上强化服务提供已经成为制造企业向服务化发展的必然趋势。研... 基于剧变市场环境下单纯地提供产品已经不能为现代企业赢得竞争优势的现实,服务嵌入(服务提供)正成为提高制造企业运作效率进而提升竞争优势的关键因素之一,在产品运作的基础上强化服务提供已经成为制造企业向服务化发展的必然趋势。研究认为,确定服务嵌入内涵是制造企业实施服务嵌入的关键,构建服务嵌入构成要素是直接目标。为此,明确了服务嵌入内涵,提出了其相应的构念要素。 展开更多
关键词 服务嵌入 构成要素 服务嵌入时机 服务嵌入程度 客户关系
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1982年以来中国国际收支的变化趋势及原因分析 被引量:4
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作者 胡子英 周雨 康遥 《商场现代化》 2013年第19期68-69,共2页
一个国家的经济发展状况可以通过国际收支这一衡量标准来反映出来,分析中国国际收支平衡表的数据可以得出的结论,中国国际收支多年持续双顺差,这充分表明了中国经济的跨越式发展。通过对1982以来年中国国际收支平衡表的研究,以确定中国... 一个国家的经济发展状况可以通过国际收支这一衡量标准来反映出来,分析中国国际收支平衡表的数据可以得出的结论,中国国际收支多年持续双顺差,这充分表明了中国经济的跨越式发展。通过对1982以来年中国国际收支平衡表的研究,以确定中国国际收支变化趋势和背后的原因。 展开更多
关键词 国际收支 经常账户 资本账户 储备资产项目
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二元羧酸取代的三核钼原子簇化合物的红外光谱与结构
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作者 覃业燕 吴棱 +5 位作者 康遥 唐艳红 李兆基 郑瑜 陈瑞平 姚元根 《光谱学与光谱分析》 SCIE EI CAS CSCD 北大核心 2000年第5期663-664,共2页
本文考察了新合成的两个二元羧酸取代的三核钼衍生物Mo3 S4 (DTP) 3 (phthalate) (Py) (A) (DTP =diethyldithiophosphate,[S2 P(OEt) 2 ]-)和Mo3 S4 (DTP) 3 (malonate) (Py) (B)的红外吸收光谱 ,对Mo—S键及配体的主要吸收峰进行了归... 本文考察了新合成的两个二元羧酸取代的三核钼衍生物Mo3 S4 (DTP) 3 (phthalate) (Py) (A) (DTP =diethyldithiophosphate,[S2 P(OEt) 2 ]-)和Mo3 S4 (DTP) 3 (malonate) (Py) (B)的红外吸收光谱 ,对Mo—S键及配体的主要吸收峰进行了归属和讨论 ,并与化合物Mo3 S4 (DTP) 4(Py) (C)的谱图进行了比较。结果表明 ,通过对这类复杂化合物红外特征振动分析可以获得较为丰富的结构信息。 展开更多
关键词 红外光谱 三核钼簇合物 二元羧酸 结构 固氮酶
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我国农村留守儿童状况研究 被引量:1
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作者 周雨 康遥 +1 位作者 贾佳霖 黎钰涵 《科教导刊》 2013年第27期191-192,共2页
随着我国现代化进程的进一步推进,农村留守儿童问题已经聚焦了来自社会各界的目光.本文通过对父母外出务工对留守儿童造成的各方面影响进行探索,为解决留守儿童问题提出一系列对策与建议,同时在一定程度上丰富了留守儿童问题的研究,推... 随着我国现代化进程的进一步推进,农村留守儿童问题已经聚焦了来自社会各界的目光.本文通过对父母外出务工对留守儿童造成的各方面影响进行探索,为解决留守儿童问题提出一系列对策与建议,同时在一定程度上丰富了留守儿童问题的研究,推进留守儿童问题的解决. 展开更多
关键词 留守儿童 现状 对策
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司徒雷登与中美关系:教育家、大使与“符号”
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作者 江涛 康遥 《兰州教育学院学报》 2013年第7期5-7,共3页
司徒雷登是中美关系中一个重要的、有争议的人物。在中国的50多年,他先后完成了传教士、校长和大使三个身份的转变。在担任燕京大学校长期间,他为中国的教育和中美文化交流做出了贡献。1946年出任大使后,他逐步成为美国对华政策的代言人... 司徒雷登是中美关系中一个重要的、有争议的人物。在中国的50多年,他先后完成了传教士、校长和大使三个身份的转变。在担任燕京大学校长期间,他为中国的教育和中美文化交流做出了贡献。1946年出任大使后,他逐步成为美国对华政策的代言人,形成了自己对中国政局的独特观点,并在矛盾中履行着使命。1949年以后的司徒雷登逐步成为中美关系从对抗到对话再到正常化的一个缩影。在新时期,重新梳理司徒雷登的在华活动以及对中美关系的影响,有助于中美两国释疑解惑。 展开更多
关键词 司徒雷登 教育家 大使 符号 中美关系 象征
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Synthesis and Crystal Structure of [Zn(HPDB)_2(H_2O)_2]n·2nDMSO·2nH_2O (H_2-PDB = Pyridine-3,4-dicarboxylic Acid)
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作者 康遥 张健 +2 位作者 覃业燕 李兆基 姚元根 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2006年第3期374-377,共4页
The title complex [Zn(HPDB)2(H2O)2]n·2nDMSO·2nH2O(H2-PDB is pyridine-3, 4-dicarboxylic acid and DMSO the dimethyl sulphoxide) was synthesized under traditional solution condition. Its crystal (C18H28N... The title complex [Zn(HPDB)2(H2O)2]n·2nDMSO·2nH2O(H2-PDB is pyridine-3, 4-dicarboxylic acid and DMSO the dimethyl sulphoxide) was synthesized under traditional solution condition. Its crystal (C18H28N2O14S2Zn) belongs to monoclinic system, space group P21/c with a = 8.2791 (6), b = 12.5495(10), c = 13.6519( 11 )A°, β = 105.294(2)°, V = 1368.18(18)A°^3, Z = 2, Mr = 625.91, Dx = 1.514 g/cm^3,μ = 1.117 mm^-1, F(000) = 648, R = 0.0654 and wR = 0.1654 for 2414 observed reflections (I 〉 2σ(I)). It has a 2-D planar network, in which the Zn atom is six-coordinated and hydrogen bonds between carboxylate groups, DMSO and water molecules result in the final 3D structure. 展开更多
关键词 crystal structure zinc(Ⅱ) pyridine-3 4-dicarboxylic acid
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Synthesis and Crystal Structure of [Cu(phen)_2(SO_4)(H_2O)]·0.5C_4H_4O_4·7H_2O 被引量:2
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作者 王小琴 温一航 +4 位作者 康遥 张健 程建开 李兆基 姚元根 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2006年第1期17-20,共4页
The title compound, [Cu(phen)2(SO4)(H2O)]·0.5C4H4O4·7H2O (phen = 1,10-phe-nan throline and C4H4O4 = fumaric acid), has been synthesized and characterized by single-crystal X-ray diffraction. The crys... The title compound, [Cu(phen)2(SO4)(H2O)]·0.5C4H4O4·7H2O (phen = 1,10-phe-nan throline and C4H4O4 = fumaric acid), has been synthesized and characterized by single-crystal X-ray diffraction. The crystal is of triclinic, space group P1^- with a = 11.4827(2), b = 11.9086(2), c = 13.77350(10) A, α = 80.6830(10), β = 66.6480(10), γ = 64.048000)°, V = 1554.63(4) A^3, Mr = 722.17, Z = 2, Dc = 1.543 g/cm^3,μ = 0.845 mm^-1, F(000) = 750, R = 0.0349 and wR = 0.0837 for 4754 observed reflections (1 〉 2σ(I)). The compound contains a six-coordinated copper(Ⅱ) center, which is surround by four N atoms of two phen ligands (Cu-N distances in the range of 1.997(2)- 2.225(2) A), one sulfate O atom (Cu-O = 2.0037(17) A) and one water O atom (Cu-O(Sw) = 2.719(2) A,) in a distorted octahedral geometry. Extensive hydrogen-bonding interactions are involved in water molecules, ligated sulfate anions and fumaric acid molecules. In addition, π-π interactions via aromatic nitrogen-containing ligands are also discussed. The combination of non-covalent interactions leads to the formation of a 3-D network structure. 展开更多
关键词 copper compound N-containing ligand HYDROGEN-BONDING π-π interactions
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Odd-membered cyclic hetero-polyoxotitanate nanoclusters with high stability and photocatalytic H_(2) evolution activity 被引量:1
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作者 Ya-Jie Liu Lin Geng +2 位作者 Yao Kang Wei-Hui Fang Jian Zhang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2021年第8期1332-1337,共6页
We investigated the hydrolysis of TiⅣ along with naturally abundant AlⅢ ions and reported the formation of a stable and semiconducting nanocluster. Interestingly, this compound exhibits an unusual odd-membered ring ... We investigated the hydrolysis of TiⅣ along with naturally abundant AlⅢ ions and reported the formation of a stable and semiconducting nanocluster. Interestingly, this compound exhibits an unusual odd-membered ring structure and also represents the largest Al-containing polyoxotitanium cluster(PTC) observed thus far. The presence of a shell of organic ligands as well as the incorporation of hetero-AlⅢ ions endowed the nanocluster with high air, thermal, and pH stabilities. The present compound exhibited a record photocatalytic hydrogen evolution of 402.88 μmol g–1 h–1 among PTC materials. This work not only paves the way towards stable PTC materials but also provides new insights into the design of novel photocatalysts. 展开更多
关键词 Polyoxotitanate Heterometallic cluster NANOCLUSTER Water-splitting H2 production
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Syntheses and Crystal Structures of Molybdenum-Sulfur Clusters Mo_3S_4 (dtp)_3(o-CH_3OC_6H_4COO)(Py) and Mo_3S(dtp)_3(p-HOC_6H_4COO)(DMF)·EtOH 被引量:1
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作者 唐艳红 李兆基 +3 位作者 吴棱 覃业燕 康遥 姚元根 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2002年第1期71-77,共7页
The title compounds Mo3S4(dtp)3(o-CH3OC6H4COO)(Py) 1 and Mo3S(dtp)3(p-HOC6H4COO)(DMF)稥tOH 2 (dtp = diethyldithiophosphate) were synthesized by thereactions of Mo3S4(dtp)4(CH3CN) and Mo3S4(dtp)3(CH2ClCOO)(Py) with o-m... The title compounds Mo3S4(dtp)3(o-CH3OC6H4COO)(Py) 1 and Mo3S(dtp)3(p-HOC6H4COO)(DMF)稥tOH 2 (dtp = diethyldithiophosphate) were synthesized by thereactions of Mo3S4(dtp)4(CH3CN) and Mo3S4(dtp)3(CH2ClCOO)(Py) with o-methoxylbenzoic acid and p-hydroxybenzoic acid, respectively. Their crystal structures were determined by X-ray diffraction analysis. The crystal data for compound 1: Mo3S10P3C25H42O9N, monoclinic P21/n, Mr = 1201.93, Z = 4, a = 14.164(1), b = 23.065(2), c = 14.732(1) ? = 109.677(1) ? V = 4532(1) ?, D= 1.762 gcm-3, = 1.428 mm-1, F (000) = 2408, R = 0.0739, wR = 0.1528 for 3552 observed reflections (I > 2); and for compound 2: Mo3S10P3C24H48O11N, triclinic P ? Mr = 1227.96, Z = 2, = 10.2098(3), b = 14.3333(4), c = 18.1711(5) ? = 94.694(1), = 102.166(1), = 110.665(1) , V = 2396.5(1)3, Dc = 1.638 gcm-3, = 1.350mm-1, F (000) = 1184, R = 0.0445, wR = 0.1281 for 6597 observed reflections (I > 2). Intermolecular S…S interactions are observed between the molecules of compound 1 while intramolecular O…HC and intermolecular S…HC hydrogen bondings are found in the crystal packing diagram of compound 2. 展开更多
关键词 molybdenum-sulfur cluster crystal structure S…S interactions hydrogen bonding
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Synthesis and Crystal Structure of {Cu_2(pdc)_2(4,4'-bipy)(H_2O)·3H_2O}_2 被引量:1
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作者 温一航 张健 +5 位作者 覃业燕 李兆基 康遥 陈玉标 程建开 姚元根 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2004年第9期1001-1004,共4页
The title compound {Cu2(pdc)2(4,4?-bipy)(H2O)3H2O}2 1 (H2pdc = pyridine-2,6- dicarboxylic acid, also known as dipicolinic acid; 4,4?-bipy = 4,4?-bipyridine) has been synthesized by the hydrothermal reaction and its st... The title compound {Cu2(pdc)2(4,4?-bipy)(H2O)3H2O}2 1 (H2pdc = pyridine-2,6- dicarboxylic acid, also known as dipicolinic acid; 4,4?-bipy = 4,4?-bipyridine) has been synthesized by the hydrothermal reaction and its structure was determined by single-crystal X-ray diffraction. The crystal is of triclinic, space group Pi with a = 7.2278(3), b = 10.6259(4), c = 17.7614(6) ? a = 79.5990(10), = 83.6300(10), ? = 71.8280(10)o, V = 1272.60(8) ?, C48H44Cu4N8O24, Mr = 1371.07, Z = 1, Dc = 1.789 g/cm3, = 1.747 mm-1, F(000) = 696, R = 0.0397 and wR = 0.1137 for 3938 observed reflections (I > 2s(I)). There are two kinds of Cu coordination environments, and each central copper(II) atom is five-coordinated in a distorted square-based pyramidal coordination geo- metry. Four copper(II) atoms are linked by four pdc and two 4,4?-bipy ligands to form an annular rectangle structure. Extensive hydrogen-bonding interactions involving carboxylate O atoms as well as coordinated and free water molecules lead to the formation of a three-dimensional network struc- ture. 展开更多
关键词 dipicolinic acid copper compound annular rectangle structure
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Synthesis and Crystal Structure of Pd(ptac-C,N)(acac-O,O)
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作者 程建开 李兆基 +4 位作者 陈玉标 覃业燕 康遥 温一航 姚元根 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2003年第1期43-46,共4页
A stable organometallic Pd (Ⅱ) compound Pd(ptac-C,N)(acac-O,O) (Hacac = acetyl acetone, Hptac = 3-(2-pyridinethioxy)-acac, formula: C15H17NO4SPd, Mr = 413.76) 1 has been synthesized and its crystal structure was dete... A stable organometallic Pd (Ⅱ) compound Pd(ptac-C,N)(acac-O,O) (Hacac = acetyl acetone, Hptac = 3-(2-pyridinethioxy)-acac, formula: C15H17NO4SPd, Mr = 413.76) 1 has been synthesized and its crystal structure was determined by X-ray crystallography. The crystal is of monoclinic with space group C2/c, a = 17.9342(3), b = 17.7791(4), c = 13.1800(1) ? b = 128.400(1), V = 3293.5(1) 3, Z = 8, Dc = 1.669 g/cm3, F(000) = 1664, m = 1.269 mm-1, R = 0.0261 and wR = 0.0710 for 2653 observed reflections (I > 2s(I)). There exist two Pd rings in the title compound, C(14)O(4)PdO(3)C(12)C(13) and C(1)NPdC(8)S, with the palladium atom taking a square-planar coordination. Two oxygen atoms from the acetyl acetone ligand (PdO, 1.991(2) and 2.036(2) ), one N atom (PdN 2.019 ? and the g-carbon atom (PdC 2.067(3) ? from the ptac ligand are coordinated to Pd. 展开更多
关键词 synthesis catalytic process crystal structure PALLADACYCLE
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Synthesis and Crystal Structure of Cubane-type Molybdenum Cluster Complex Mo_4S_4(DTP)_4[μ-SOP(OEt)_2]_2
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作者 覃业燕 李兆基 +2 位作者 康遥 吴棱 姚元根 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2002年第3期303-308,共6页
A cubane-type molybdenum cluster compound Mo4S4(DTP)4[-SOP(OEt)2]2 A (DTP = diethyl dithiophosphate) was obtained from the reaction of cation [Mo3O2S2(H2O)9]4+ B with metal tin as well as HDTP. The crystal structure h... A cubane-type molybdenum cluster compound Mo4S4(DTP)4[-SOP(OEt)2]2 A (DTP = diethyl dithiophosphate) was obtained from the reaction of cation [Mo3O2S2(H2O)9]4+ B with metal tin as well as HDTP. The crystal structure has been determined by X-ray crystallography and the data for the title compound: Mo4S14P6O14C24H60, triclinic P , Mr = 1591.14, a = 12.5596(5), b = 14.3441(5), c = 18.0005(6) ? = 85.318(1), = 70.495(1), = 78.415(2)? V = 2994.2(2) ?, Z = 2, Dc = 1.765 g/cm3, (MoK? = 1.515 mm-1, F(000) = 1596, R = 0.0918 and wR = 0.1908 for 3546 reflections (I > 2(I)). X-ray analysis reveals that two weak CH贩稯 hydrogen bonds exist in the packing diagram with C贩稯 distance 3.22(5) ? The structure of A is similar to that of -Mo4S4(DTP)6 except that one sulfur of each bridging DTPs has been replaced by oxygen during the reaction, resulting in two bridging [SOP(OEt2)2] - ligands. 展开更多
关键词 cubane-type structure molybdenum cluster synthesis crystal structure
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Synthesis and Crystal Structure of a Mo-S Cluster Compound Coordinated by Isonicotinate
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作者 覃业燕 李兆基 +3 位作者 康遥 张健 程建开 姚元根 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2007年第9期1043-1046,共4页
A cluster compound, Mo3S4(DTP)3(IN)(Py)·EtOH I (DTP = diethyl dithiophosphate, IN = isonicotinate) has been rationally synthesized and characterized by single-crystal X-ray diffraction. The crystal belong... A cluster compound, Mo3S4(DTP)3(IN)(Py)·EtOH I (DTP = diethyl dithiophosphate, IN = isonicotinate) has been rationally synthesized and characterized by single-crystal X-ray diffraction. The crystal belongs to the triclinic system, space group P1 with a = 13.6345(2), b = 13.7805(2), c = 14.5400(1)A, α = 107.078(1), β = 113.380(1), γ = 96.310(1)°, C25H45Mo3- N2O9P3S10, Mr = 1218.96, V = 2315.75(5) A^3, Z = 2, Dc = 1.748 g/cm^3, μ = 1.399, F(000) = 1224, R = 0.0425 and wR = 0.1144 for 6335 observed reflections (I 〉 2σ(I)). 31^P NMR spectrum has been measured with the resonance 110.050 and 108.783 (2:1). 展开更多
关键词 molybdenum cluster SYNTHESIS crystal structure
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A New 3D Supramolecular Network Formed by [Zn_3(2,6-Pyridinedicarboxylate)_3Cl_4]^(4-)and 4-Carboxypyridinium
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作者 杨娥 康遥 +1 位作者 王小琴 刘子生 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2010年第5期774-778,共5页
A new compound [Zn3(C7NO4H3)3Cl4]·[C6NO2H6]4·4H2O (I) has been synthesized and structurally characterized by X-ray crystallography.It crystallizes in monoclinic,space group C2/c with a=16.9018(14),b=12... A new compound [Zn3(C7NO4H3)3Cl4]·[C6NO2H6]4·4H2O (I) has been synthesized and structurally characterized by X-ray crystallography.It crystallizes in monoclinic,space group C2/c with a=16.9018(14),b=12.6902(10),c=25.1170(2),β=90.54°,V=5387.0(8)3,Z=4,Zn3C45H41Cl4N7O24,Mr=1401.76,Dc=1.728 g/cm3,F(000)=2840,μ(MoKa)=1.615 mm-1,the R= 0.0758 and wR=0.2060 for 3468 observed reflections (I 〉 2σ(I)).Analysis of single-crystal X-ray diffraction data shows that compound I displays an interesting example of 3D supramolecular networks with perfect neutral and ionic hydrogen bonding array. 展开更多
关键词 crystal structure 3D supramolecular network hydrogen bonding array
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多销售渠道的企业虚拟库存池决策分析——预防性横向调货视角 被引量:2
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作者 李晓宏 康遥 《系统工程》 CSSCI CSCD 北大核心 2016年第6期112-118,共7页
分析多销售渠道企业在需求信息更新后,判断并再平衡各渠道"库存缺货"与"库存剩余"情形,构建调货阶段与订货阶段的企业库存决策模型,研究表明企业采用预防性横向调货策略在其调货与订货决策中均具有可行解,提出一般... 分析多销售渠道企业在需求信息更新后,判断并再平衡各渠道"库存缺货"与"库存剩余"情形,构建调货阶段与订货阶段的企业库存决策模型,研究表明企业采用预防性横向调货策略在其调货与订货决策中均具有可行解,提出一般决策模型并给出随机规划的数值求解方法,分析渠道间转移成本、信息更新能力、渠道数量、渠道结构等对企业订货决策与期望收益均产生不同程度的影响。 展开更多
关键词 多渠道 需求信息更新 预防性横向调货 库存决策
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破解R.S.Bhalerao公钥加密方案
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作者 贾建卫 刘金会 +2 位作者 吴朔媚 张焕国 康遥 《武汉大学学报(理学版)》 CAS CSCD 北大核心 2016年第5期425-428,共4页
R.S.Bhalerao等人设计了建立在矩阵群上的R.S.公钥加密方案.本文利用矩阵的一些性质,在不需要找到私钥的情况下,多项式时间内恢复出明文,并给出了方法描述和时间复杂度分析,破解了R.S.Bhalerao公钥加密方案.
关键词 密码学 公钥加密 密码分析 云计算 线性方程组
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基于多连接自适应技术的三层服务器设计及性能分析
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作者 康遥 张新家 《信息安全与通信保密》 2009年第4期67-70,共4页
针对服务器响应时间依赖网络通信质量的缺点,文章提出了多连接自适应方法,基于该方法设计了一种3层结构的网络服务器,并在此基础上对该服务器进行了性能分析。测试表明,将多连接自适应方法运用到服务器中,能够有效缩短服务器响应时间,... 针对服务器响应时间依赖网络通信质量的缺点,文章提出了多连接自适应方法,基于该方法设计了一种3层结构的网络服务器,并在此基础上对该服务器进行了性能分析。测试表明,将多连接自适应方法运用到服务器中,能够有效缩短服务器响应时间,提高服务器效率,使其更具实用价值。 展开更多
关键词 连接线程池 多连接自适应 服务器 网络通信质量
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