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Top 10 Influential Events in carbon neutrality and climate change response for 2023

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Frontiers in Energy 2024年第1期18卷 1-3页

作者： Research Institute of Carbon Neutrality of Shanghai Jiao Tong university Research Institute of Carbon Neutrality Shanghai Jiao Tong UniversityShanghai 200240China

In 2023, the global community intensified its efforts towards achieving carbon neutrality and addressing climate change, witnessing several impactful events. Research Institute of Carbon Neutrality, Shanghai Jiao Tong university compiled the Top 10 Events (in chronological order) in the field of global carbon neutrality and climate change response for 2023, to share with readers these significant moments that document the ongoing ambition and collective efforts of human society.

关键词： neutral collective intensified

Evaporation Kinetics of SnS from SnS-Cu_2S Melts

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维普期刊数据库

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Journal of Materials Science & Technology 1998年第1期14卷 45-48页

作者： Yixin HUA and Chunpeng LIU (Dept. of Metallurgy, kunming university of Science and Technology, kunming 650093, china) kunming Univ Sci & Technol Dept Met Kunming 650093 Peoples R China

The kinetics of SnS evaporation from SnS-Cu2S melts was investigated by a unique experimental method. It is shown that the process is controlled by the mass transport of SnS in gas phase. The evaporation rate of SnS is significantly enhanced by increasing tempeature and carrier gas flow rate. The apparent activation energy for the process is found to be 204.67 kJ. The evaporation rate for the present system is much smaller than that for SnS-FeS system.

关键词： SnS Cu Evaporation Kinetics of SnS from SnS-Cu2S Melts

OPTIMAL AND ROBUST DETECTION OF MULTIVARIATE OUTLIERS FOR ELLIPTICALLY CONTOURED DISTRIBUTION

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Systems Science and Mathematical Sciences 1992年第2期5卷 146-163页

作者： WANG Xueren PAN Jianxin (Institute of Applied Statistics,yunnan university,kunming 650091,china)

The outlier problem for a multivariate elliptically contoured distribu-tion’s random sample with mean slippage is defined and the likelihood ratio test ofthe null hypothesis,in which there are no outliers,versus the alternative hypothesis,in which some outliers are present,is *** show that the testing problemis invariant under a group of affine transformations and obtain the maximal in-variance which is equivalent to the likelihood ratio testing ***,the non-null and null density distribution functions of the likelihood ratio testingstatistic are *** find that the null density distribution function of thetesting statistic is robust and the density distribution function is a monotonicallikelihood ratio function of the maximal ***,the likelihood ratiotest is a uniformly most powerful invariant test among the group of affine *** the last section,we give an example of detecting multivariate outliersin elliptically contoured distribution.

关键词： Outliers elliptically contoured distributions likelihood ratio criteria uniformly most powerful invariant test

Factors Influencing Runoff P Losses from Farmlands of the Dianchi Lake Watershed in yunnan, china

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Pedosphere 2004年第2期14卷 259-262页

作者： ZHANGNai-Ming YUYang,HONGBo CHENJian-Jun ZHANGYu-Juan CollegeofResourcesandEnvironmentalScience YunnanAgriculturalUniversityYunnan650201（China）.E-mail：zhangnaiming@sinacorn

Effects of factors such as slope, surface soil textuie, fertilization andcrop cover with different rainfall intensities on phosphorus (P) losses in farmland runoff of theDianchi Lake Watershed in yunnan Province of china were studied through a rainfall simulation testusing a red soil, one of the most widely distributed soils of the study area. Results showed thatthe runoff concentrations of total phosphorus (TP) and P losses differed with the slope, beinghighest when the slope was 18 deg. At twodifferent rainfall intensities, the runoff TP and P losseshad a similar decreasing trend as the surface soil texture became coarser, therefore applying thegrit would decrease P in runofi from soils of farmland on slopes with heavier textures. With wheatas a crop cover the runoff TP concentrations and P losses were significantly lower than those of thebare soil. This showed that plant cover would greatly decrease P in runoff from the farmland of thestudy area. The TP concentration in runoff from the soil two days after fertilization doubled whencompared with that from the non-fertilized soil, indicating that fertilization could mean a dramaticrise in P runoff if irrigation or heavy rainfall occurred immediately after application and that nofertilization before a rain and no irrigation immediately after fertilization would reduce runoff Ploss from the farmland of the study area.

关键词： non-point source (NPS) pollution phosphorus runoff

Method for Evaluating the Degrees of Land Use Sustainability of Mountainous County and its Application in yunnan Province,china

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Journal of Mountain Science 2008年第2期5卷 98-112页

作者： YANG Zisheng LIU Yansui TAO Wenxing XU Jingling ZHAO Qiaogui Institute of Land ＆ Resources and Sustainable Development Yunnan University of Finance and Economics Kunming 650221 China Institu te of Geographic Sciences and Natural Resources Research Chinese Academy of Science Beijing 100101 China Department of Land ＆ Resources of yunnan Province Kunming 650224 China

The evaluation of sustainable land use is the key issue in the field of studying the sustainable land utilization. In general analysis, the sustainable land use is evaluated respectively from its ecological sustainability, economic sustainability and social sustainability in china and other countries in recent years. Although this evaluation is an important work, it seems insufficient and hard to comprehensively reflect the whole degree of land use sustainability. Thus, to make up this deficiency, this paper brings forward the evaluation indexes, which make it possible to quantitatively reflect the whole degree of land use sustainability, namely, the concept of ＂degrees of overall land use sustainability＂（Dos）, and research and measurement development of the method of and calculation in Dos. Taking the evaluation of the degree of land use sustainability in county regions of yunnan Province as the actual example for analysis, results are basically as follows： 1） The degree of land use sustainability （Dos） is the ration index to organically and systematically integrate the degree of ecological friendliness （DeF）, the degree of economic viability （Dev） and the degree of social acceptability （Dsa）, able to comprehensively reflect the whole sustainability degree of regional land use 2） Based on the value of Dos, the grading system and standard for the sustainability of land use may be established and totally divided into five grades, namely, the high-degree sustainability, middle-degree sustainability, low-degree sustainability, conditional sustainability and non-sustainability. Meanwhile, the standard for distinguishing sustainability grades has also been confirmed so as to determine the nature of sustainability degrees in different grades. This makes the possibility for the combination of nature determination with ration in research result and provides with the scientific guideline and decision-making gist for better implementation of sustainable land use strategy

关键词： Land use degrees of overall sustainability evaluation method county level degrees of ecological friendliness degrees of economic viability degrees of social acceptability

Solution of an Inverse Problem of Heat Conduction of 45 Steel with Martensite Phase Transformation in High Pressure during Gas Quenching

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Journal of Materials Science & Technology 2002年第4期18卷 372-374页

作者： Heming CHENG, Tianchun HE and Jianbin XIEDepartment of Engineering Mechanics, kunming university of Science and Technology, kunming 650093, china Dept. of Eng. Mech. Kunming Univ. of Sci. and Technol. Kunming 650093 China

In order to simulate thermal strains, thermal stresses, residual stresses and microstructure of the steel during gas quenching by means of the numerical method, it is necessary to obtain an accurate boundary condition of temperature field. The surface heat transfer coefficient is a key parameter. The explicit finite difference method, nonlinear estimation method and the experimental relation between temperature and time during gas quenching have been used to solve the inverse problem of heat conduction. The relationship between surface temperature and surface heat transfer coefficient of a cylinder has been given. The nonlinear surface heat transfer coefficients include the coupled effects between martensitic phase transformation and temperature.

关键词： 45 steel Phase transformation Heat conduction

Development and Application of Non-Quenched and Tempered Steel for Auto Forging Components in china

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Journal of Iron and Steel Research International 2011年第S1期18卷 735-741页

作者： ZHANG Ying-jian 1,CHEN Si-lian 1,DONG Han 1,HUI Wei-jun 1,PENG Jun 2 (1.Institute for Structural Materials,Central Iron & Steel Research Institute,Beijing 100081,china 2.School of Physical Science and Technology,yunnan university,kunming 650091,yunnan,china) Cent Iron & Steel Res Inst Inst Struct Mat Beijing 100081 Peoples R China yunnan Univ Sch Phys Sci & Technol Kunming 650091 Yunnan Peoples R China

Non-quenched and tempered (NQT) steels have been applied for auto forging products at the aim of lower cost since 1980’s in *** quenching and tempering processes,the cost of heat treatment was greatly decreased,so they are widely applied in car forgings such as crankshaft,connecting ***,with the aim of improving performance and reducing production cost,new technologies,such as:reductions of microalloyed elements,microstructure refining,and mechanical properties forecast have been developed in china auto *** designation,processing,properties prediction and microstructure of auto components have been controlled *** the development of new technologies,NQT steel gradually began to be applied to product important parts,and replace Quenching and Tempering (QT) *** steel makers and end product users are expressed their desire to share benefits of technological *** technologies will have a huge developing space and very bright developing prospects in motor parts industry in future.

关键词： NQT steel microstructure and property forecast lower cost forging

Activity Calculation in Complex Metallurgical Molten Slag Systems Based on Regular Solution Model

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Journal of Iron and Steel Research International 2012年第3期19卷 6-10页

作者： HOU Yan-qing,XIE Gang,TAO Dong-ping,YU Xiao-hua,LI Rong-xing (Faculty of Metallurgical and Energy Engineering,kunming university of Science and Technology,kunming 650093,yunnan,china) Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 Yunnan China

The activity of FetO is very important in ironmaking and steelmaking process. In order to predict the activ- ity of Fe, O and optimize the operation conditions in ironmaking and steelmaking process, by application of regular so lution model in molten slag systems, FeO-Fe2 O3-SIO2 ternary system, FeO-Fe2 O3-SiO2-CaO and FeO-Fe2 O3-SiO2-NiO quaternary systems have been studied by the chemical equilibrium between H2/H20 gas mixture and liquid slag con tained in solid iron. The values of interaction energy between cations concerning steelmaking slags have been deter- mined by application of ferric-ferrous iron equilibrium and iron-ferric iron equilibrium. And then the activity of Fe, O can be calculated. The results show that the relative error is 3.9% in FeO-Fe203-SiO2 system and 18% in FeO- Fe203-SiO2 CaO system. The prediction of activities of FetO in the systems are in good agreement with the measure- ments and the regular solution model is valid for predicting the activity of FetO in complex molten slags systems. The activity of Fe, O in FeO-Fe20a-NiO system have not been tested presently, and the calculated result can not be assessed.

关键词： regular solution model metallurgical molten slag activity

Reengineering Model of Supply Chain of Tea Industry in yunnan

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厦门大学学报（自然科学版） 2002年第S1期41卷 230-231页

作者： LI Yan-feng 1, JIANG Fa-kui 2 (1. Management School, Huazhong university of Science and Technology, Wuhan 430074, china 2. Department of Business Administration, yunnan university of Finance and Economics, kunming 650221, china)

yunnan university of finance and Trade recording to t he statistics of chain’s output of tea, yunnan province has entered the ranks of the larger ones of the production in china. yunnan’s tea industry has the natur al resources and the economic effects envied, on the orther hand, yunnan’s tea m arket has gradually become less and the economic effects have been poor. Through our comprehensive investigation and study, we consider that because the supply chain has seriously been disjointed among production, supply and sale of tea ind ustry in yunnan, the supply chain of yunnan’s tea industry need to be reorganize d for the promoting the development of yunnan’s tea industry. The essence of reengineering of yunnan’s tea industrial supply chain is to set u p the model of the trailed operation,to strengthen the strategic partnership man agement between the supply chain, to optimize the design of the supply chain and build up and improve the working mechanism for management of the tea industrial supply chain. The structure of yunnan’s model of tea industrial supply chain: the model of com mercial flow; the model of logistics flow; the model of information flow and the model of cash flow. The solutions and policies for the reorganization of yunnan’s tea industrial sup ply chain: planning, logistics and distribution and sales. Set up the supporting system of information technology. Build up the control system of production and *** the working mechanism of yunnan’s tea industrial supply chain. Implement the engineering of exporting yunnan’s tea into the markets of other p rovinces and foreign markets. Have many the channels that raise the funds of dev elopment for yunnan’s tea industry.

关键词： yunnan tea industry reengineering supply chain building model