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建筑施工企业涉足“充电桩”投资前景分析

建筑经济 2021年第S1期42卷 366-368页

作者：郭振翔范丽佳陈荣朗史昆明胡晨晞中国建筑第四工程局有限公司广东广州510630

分析建筑施工企业首次涉足"充电桩"领域投资前景分析过程,阐述政策、市场、基础设施等发展基础,并论述变压力为动力,以纯电动渣土车为突破口,建立发展重型新能源汽车充换电基础设施产业的动力与信心,推动企业示范项目取得良好的社会效益。

关键词：充电桩投资前景分析过程投资决策新能源汽车

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蚕豆蚜发生区域趋势预测研究

西南农业学报 1996年第2期9卷 72-78页

作者：周汇李永平施文武刘刚云南省农科院植保所云南省楚雄州植保站

蚕豆蚜为豆蚜ＭｐｈｉｓｃｒａｃｃｉｖｏｒａＫｏｃｈ、豌豆蚜Ａｃｙｒｔｈｏｓｉｐｈｏｍｐｉｓｕｍ（Ｈａｒｒｉｓ）豌豆修尾蚜Ｍｅｇｏｕｒａｊａｐｏｎｉｃａ的混合种群，其发生程序用轻、中、重、中偏轻、中偏重５个级别进行描述... 详细信息

蚕豆蚜为豆蚜ＭｐｈｉｓｃｒａｃｃｉｖｏｒａＫｏｃｈ、豌豆蚜Ａｃｙｒｔｈｏｓｉｐｈｏｍｐｉｓｕｍ（Ｈａｒｒｉｓ）豌豆修尾蚜Ｍｅｇｏｕｒａｊａｐｏｎｉｃａ的混合种群，其发生程序用轻、中、重、中偏轻、中偏重５个级别进行描述。在蚕豆生长的季节里，一定区域内，同一发生程度年度间存在着明显的重复性。据此选用“模糊优先比”作为蚕豆蚜发生区域趋势预测的基本方法。用与发生程度密切相关，并具有先兆性的７个因子，对翌年蚕豆蚜发生趋势进行预测。经１９９３～１９９５连续３年应用，预测与实况均相符，较好地解决了蚕豆蚜危害的长期预报问题。

关键词：蚕豆蚜区域趋势预测

A Method of Synthetical Appraisal on "Have both Soft and Hard" Systems

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Systems Science and Systems Engineering 1999年第4期9卷 56-61页

作者： CHEN shi\|lian kunming University of Science and Technology, kunming 650093,China

In ″Have both Soft and Hard″ systems, the soft targets and hard targets are divided two distinct target system. The measured results of soft target system are regarded as a matrix with interval numbers. On the basis of incidence degree. We discussed a method of synthetical appraisal on ″Have both Soft and Hard″ systems, which combined soft targets with hard targets.

关键词： incidence degree soft target hard target

TOPSISEvaluation Method on″Have Both Hardand Soft″Systems

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Journal of Systems Science and Systems Engineering 2001年第1期13卷 121-124页

作者： CHEN shi\|lian kunming University of Science and Technology, kunming 650093, China Kunrning University of Science and Technology Kunming 650093 China

：In "Have Both Hard and Soft" systems, the soft targets and hard targets are divided into twodistinct target system. The measured results of soft target system are regarded as a matrix with intervalnumbers. On the basis of Topsis method, we discuss a new Topsis evaluation method on "Have Both Hardand Soft" systems, which combined soft targets with hard targets.

关键词： soft target hard target Close degree

Simultaneously optimizing pore morphology and enhancing mechanical properties of Al-Si alloy composite foams by graphene nanosheets

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Journal of Materials Science & Technology 2022年第6期101卷 60-70页

作者： Weiting Li Xudong Yang kunming Yang Chunnian He Junwei Sha Chunsheng shi Yunhui Mei Jiajun Li Naiqin Zhao Tianjin Key Laboratory of Composite and Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjin 300350China Sino-European Institute of Aviation Engineering Civil Aviation University of ChinaTianjin 300300China Collaborative Innovation Center of Chemical Science and Engineering Tianjin UniversityTianjin 300350China Tianjin Key Laboratory of Advanced Joining Technology School of Materials Science and EngineeringTianjin UniversityTianjin 300350China

The integrity and regularity of pore morphology play an important role in determining the mechanical properties of the metallic foam *** conventional methods on refining pore morphology are mainly focused on the optimization of fabrication techniques,however,they are usually inconvenient and ***,incorporating nano reinforcement is considered to be a suitable way to fabricate metallic composite foams accompanied by optimized pore morphology and enhanced mechanical *** this work,through a facile and rapid powder metallurgy foaming method,the aluminum-silicon(Al-Si)alloy composite foams reinforced by graphene nanosheets(GNSs)are successfully *** microstructure analyses reveal that,for the Al-Si alloy foams incorporating the GNSs(GNSs/Al-Si composite foams),the pore size is transformed to be smaller,the pore size distributions become more homogeneous and the pore shape is also refined to a regular and roundish ***,the shape of Si precipitates is found transforming from an irregular long strip(length of~20μm,width of~5μm)to a fine particle state(diameter of~5μm).Moreover,the compressive testing results show that,the 0.4wt%GNSs/Al-Si composite foams own the optimal compression stress of 11.7±0.5 MPa,plateau stress of 10.0±1.0 MPa and energy absorption capacity of 6.8±0.7 MJ/m^(3),which have improvement of 58.1%,53.8%and 51.1%in comparison with the Al-Si alloy foams counterpart,*** present findings may pave a new way for developing new generation of metallic composite foams that with stable microstructure and excellent mechanical performance.

关键词： Metal matrix composites Aluminum foam Graphene Energy absorption

Melanocortin-1 receptor gene variants in four Chinese ethnic populations

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Cell Research 2001年第1期11卷 81-84页

作者： shi PENG, XUE MEI LU, HUAI RONG LUO, JIN-GONG XIANG-YU, YA PING ZHANG (Laboratory of Cellular and Molecular Evolution, kunming Institute of Zoology, the Chinese Academy of Sciences, kunming 650223, China) 1Laboratory of Cellular and Molecular Evolution Kunming Institute of Zoology the Chinese Academy of Sciences Kunming 650223 China 1Laboratory of Cellular and Molecular Evolution Kunming Institute of Zoology the Chinese Academy of Sciences Kunming 650223 China 1Laboratory of Cellular and Molecular Evolution Kunming Institute of Zoology the Chinese Academy of Sciences Kunming 650223 China 1Laboratory of Cellular and Molecular Evolution Kunming Institute of Zoology the Chinese Academy of Sciences Kunming 650223 China 1Laboratory of Cellular and Molecular Evolution Kunming Institute of Zoology the Chinese Academy of Sciences Kunming 650223 China

There is strong relationship between melanocortin-1 receptor (MCIR) gene variants and human hair color and skin type. Based on a sequencing study of MC1R gene in 50 individuals from the Uygur, Tibetan, Wa and Dai ethnic populations, we discuss the occurrence of 7 mc1r variants consisting of 5 nonsynonymous sites (Val60Leu, Arg67Gln, Val92Met, Arg163Gln and Ala299Val) and 2 synonymous sites (C414T and A942G), among which C414T and Ala299Val were reported for the first time. Confirmation and analysis were the made of 122 individuals at three common point mutations (Val92Met, Arg163Gln, A942G) using PCR-SSCP. The frequency of Arg163Gln variant varies in the four ethnic populations, with percentage of 40%, 85.0%, 66. 2% and 72.7%, respectively, while those of Val92Met and A942G are roughly similar in these four populations. The different environments, migration and admixture of various ethnic groups in China might have impact on the observed frequency of Arg163Gln.

关键词： MC1R gene ethnic populations nonsynonymous site synonymous site.

The evolution of cooperation in asymmetric systems

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Science China(Life Sciences) 2010年第1期53卷 139-149页

作者： WANG RuiWu1 & shi Lei2 1 State Key Laboratory of Genetic Resources and Evolution,kunming Institute of Zoology,Chinese Academy of Science,kunming 650223,China 2 Statistics and Mathematics College,Yunnan University of Finance and Economics,kunming 650221,China 1. State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology Chinese Academy of Science Kunming 650223 China2. Statistics and Mathematics College Yunnan University of Finance and Economics Kunming 650221 China

Explaining the "Tragedy of the Commons" of the evolution of cooperation remains one of the greatest problems for both biology and social *** interaction,which is one of the most important characteristics of cooperative systems,has not been sufficiently considered in the existing models of the evolution of *** the inequality in the number and payoff between the cooperative actors and recipients in cooperation systems,discriminative density-dependent interference competition will occur in limited dispersal *** model and simulation show that the local but not the global stability of a cooperative interaction can be maintained if the utilization of common resource remains unsaturated,which can be achieved by density-dependent restraint or competition among the cooperative *** intense density dependent interference competition among the cooperative actors and the ready availability of the common resource,with a higher intrinsic contribution ratio of a cooperative actor to the recipient,will increase the probability of *** cooperation between the recipient and the cooperative actors can be transformed into conflict and,it oscillates chaotically with variations of the affecting factors under different environmental or ecological *** higher initial relatedness(*** to kin or reciprocity relatedness),which is equivalent to intrinsic contribution ratio of a cooperative actor to the recipient,can be selected for by penalizing less cooperative or cheating actors but rewarding cooperative individuals in asymmetric *** initial relatedness is a pivot but not the aim of evolution of *** explains well the direct conflict observed in almost all cooperative systems.

关键词： cooperation altruism density dependent tragedy of the commons oscillation chaos asymmetric interaction interference competition

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山竹果皮抗氧化活性成分的超声提取工艺

森林工程 2013年第4期29卷 70-73页

作者：张晓军李春英刘帅华刘德曼李朝施昆明赵春建吉林省林业科学研究院长春130033 东北林业大学森林植物生态学教育部重点实验室哈尔滨150040

以山竹果皮为原料,用正交试验法优化山竹果皮抗氧化活性成分的超声提取工艺,考察乙醇浓度、超声时间、超声温度、液料比4个因素对提取液清除DPPH自由基能力的影响,同时对超声提取进行数学模拟,模拟值与试验结果吻合良好。通过拟合的方... 详细信息

以山竹果皮为原料,用正交试验法优化山竹果皮抗氧化活性成分的超声提取工艺,考察乙醇浓度、超声时间、超声温度、液料比4个因素对提取液清除DPPH自由基能力的影响,同时对超声提取进行数学模拟,模拟值与试验结果吻合良好。通过拟合的方程确立山竹果皮抗氧化活性成分的优化提取工艺条件为:提取溶剂65%乙醇、超声时间32 min、超声温度41℃和液料比10 mL/g。对优化提取条件下山竹果皮提取液浓缩物的总酚含量,以及清除DPPH和抑制β-胡萝卜素漂白的IC50值进行测定,并与公认的天然抗氧化剂儿茶素进行比较,表明山竹果皮提取物具有较强的抗氧化能力。

关键词：山竹果皮抗氧化提取总酚

ASSESSMENT OF LOCAL INFLUENCE FOR F-TESTIN LINEAR REGRESSION MODEL

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Systems Science and Mathematical Sciences 1999年第1期12卷 33-39页

作者： shi Lei (Department of Statistics, Yunnan University, kunming 650091, China) 云南大学统计系云南昆明

In linear regression model, the influence on the regression coefficients has beed paid great attention and other aspects such as the influence on confidence regions have also been studied. However, influence on F-test in linear regression model received few consideration. This paper examines the local influence of small perturbations on Fstatistic. The diagnostic results permit one to check the sensitivity of F-statistic to the exact perturbations of error variance, explanatory variables and response variables. This method is applied to testing problem of transformation parameter in transformation *** are illustrated with two examples and compared with standard method.

关键词： Linear regression model local influence F-test transformation model.