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Precipitatation Behavior of FeTiP Phase in High Strength IF Steel

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International Journal of Minerals,Metallurgy and Materials 2000年第3期14卷 197-203页

作者： Zisu Zhao, Weimin Mao, Yongning Yu (university of Science and Technology beijing, beijing 100083. China) university of Science and Technology beijing Beijing 100083 China

The influence of chemical composition and annealing parameters on the behavior of FeTiP precipitation has been investigated. With increasing Ti content the yield strength and tensile strength were reduced, and the tendency of FeTiP precipitation became more remarkable. No FeTiP precipitate was observed and the best mechanical properties have been obtained in the steel sheet, of which the atom ratio of Ti to N is approximately equal to 1. In the temperature range of 700 to 800℃ the FeTiP precipitation could appear easily. The precipitation process was suppressed when the annealing temperature was below 600℃, and the FeTiP phase was dissolved above 900℃. The FeTiP precipitates would inhibit the migration of grain boundaries during the recrystallization in certain extent, and weaken the density of {111} fiber texture, which resulted in the reduction of r value. The relationship between composition and processing parameters, as well as their influence on the mechanical properties is discussed.

关键词： IF steel FeTiP precipitation

Life cycle assessment for the "implicit" environmental impact of construction projects

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Journal of Pharmaceutical Analysis 2009年第3期21卷 167-171页

作者： Xiao-gen Shuai1,2,Hui-qiang Li1,2,Li Tang1,3.. school of Civil Engineering and Mechanics,Huazhong university of Science & Technology,Wuhan 43.074 2. Hubei Key Laboratory of Control Structure,Huazhong university of Science & Technology,Wuhan 43.074,China 3. Bartlett school of Graduate Study,university College London,London WC1E 6BT,UK. school of Civil Engineering and Mechanics Huazhong University of Science and Technology Wuhan 430074 China Hubei Key Laboratory of Control Structure Huazhong University of Science and Technology Wuhan 430074 China Bartlett school of Graduate Study University College London London WC1E 6BT United Kingdom

The paper has established an assessment system and a quantitative calculation method of the 'implicit' environmental impact including environmental impact indicator,resources consumption indicator and energy consumption indicator. The quantitative calculation of the environmental impact indicator is based on the life cycle assessment system and the evaluation software BEES. The paper identifies normalization reference values and weights for 12 categories of the environmental impact. It also analyzes the environmental impact indicator in life cycle stages,raw materials,transportation,manufacturing,utilization,and end of life. A university refectory project is studied. The result has shown that human health,global warming and acidification are the first three environmental impacts in 12 categories. The environmental impact indicator per m2 of this project is 18.448×10-2 standard human equivalent weight. Moreover,97.3. of the total environmental impact occurs at the raw material stage,in which the most severe environmental impact is cancerous health effect; the global warming is the main impact at the transportation and manufacturing stages; the indoor air quality impact is at the usage stage.

关键词： life cycle assessment environmental impact implicit environmental impact BEES software

Plant DNA barcoding in China

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Journal of Systematics and Evolution 2011年第3期49卷 165-168页

作者： 1De-Zhu LI 2Jian-Quan LIU 3.hi-Duan CHEN 1Hong WANG 4Xue-Jun GE 3.hi-Liang ZHOU 1Lian-Ming GAO 5Cheng-Xin FU 6Shi-Lin CHEN 1(Plant Germplasm and Genomics Centre,Germplasm Bank of Wild Species in Southwest China Key Laboratory of Biodiversity and Biogeography,Kunming Institute of Botany,Chinese Academy of sciences,Kunming 650204,China) 2(Key Laboratory of Arid and Grassland Ecology,College of Life sciences,Lanzhou university,Lanzhou 73.000,China) 3.State Key Laboratory of Systematic and Evolutionary Botany,Institute of Botany,Chinese Academy of sciences,beijing 100093.China) 4(Key Laboratory of Plant Resources Conservation and Sustainable Utilization,South China Botanical Garden,Chinese Academy of sciences,Guangzhou 510650,China) 5(Key Laboratory of Conservation Biology for Endangered Wildlife of the Ministry of Education,College of Life sciences,Zhejiang university,Hangzhou 3.0058,China) 6(Institute of Medicinal Plant Development,Chinese Academy of Medical sciences,peking Union Medical College,beijing 100193.China) (Plant Germplasm and Genomics Centre Germplasm Bank of Wild Species in Southwest China Key Laboratory of Biodiversity and Biogeography Kunming Institute of Botany Chinese Academy of Sciences Kunming 650204 China) (Key Laboratory of Arid and Grassland Ecology College of Life Sciences Lanzhou University Lanzhou 730000 China) (State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China) (Key Laboratory of Plant Resources Conservation and Sustainable Utilization South China Botanical Garden Chinese Academy of Sciences Guangzhou 510650 China) (Key Laboratory of Conservation Biology for Endangered Wildlife of the Ministry of Education College of Life Sciences Zhejiang University Hangzhou 310058 China) (Institute of Medicinal Plant Development Chinese Academy of Medical Sciences Peking Union Medical College Beijing 100193 China)

Identification is the keystone of biology(Bell, 1986).However,to biologists and students of biology, the total numbers of species that must be identified far outnumber the names commonly used in English,Chinese,or oth... 详细信息

关键词： DNA Plant DNA barcoding in China matK

Chemical and mineralogical characterizations of a copper converter slag

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Rare Metals 2002年第3期21卷 175-181页

作者： DENG Tong and LING YunhanInstitute of Chemical Metallurgy, Chinese Academy of sciences, beijing 00080, China Institute of Chemical Metallurgy Chinese Academy of Sciences 北京 100080

A copper converter slag was examined chemically and mineralogically to determine its existing phases, in particular those containing Co and Cu. The slag consists predominantly of fayalite and magnetite, together with some glass, chalcocite, and metallic copper. Copper is entrapped in the slag mostly as chalcocite and metallic copper, as well as trace copper oxide. There was no indication of any independent Co mineral in the slag, but Co was found to be enriched in fayalite and megnetite as solid solution, although Co was detected in all the phases of the slag by SEM-EDX (scanning electron microscopy equipped with model EDAX-9100 energy dispersive spectrometer) and WDS (model WDX-2A X-ray wave-length dispersive spectrometer).

关键词： Cu Co converter slag characterization

不同类型幼儿园办学经费中地方政府分担比例及投入差异--基于3.25县的微观数据

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教育发展研究 2011年第17期31卷 15-23页

作者：宋映泉北京大学中国教育财政科学研究所北京100871

本文根据三省25县591所幼儿园调研数据分析了地方政府财政投入在学前教育办学经费中的分担比例,并分析了在不同类型幼儿园机构之间政府财政投入的差异。研究发现,整体上地方政府分担比例低且不平衡:在公办园与民办园之间、不同类型公办... 详细信息

本文根据三省25县591所幼儿园调研数据分析了地方政府财政投入在学前教育办学经费中的分担比例,并分析了在不同类型幼儿园机构之间政府财政投入的差异。研究发现,整体上地方政府分担比例低且不平衡:在公办园与民办园之间、不同类型公办园之间地方政府分担比例和财政投入有显著差异,同时讨论了学前教育财政投入不公平的体制性根源和可能的社会经济后果,最后,认为对地方政府在"学前教育三年行动计划"中将建设公办幼儿园和示范性幼儿园作为政策目标的做法应谨慎对待。

关键词：学前教育财政投入幼儿园社会公平

CHEMISTRY OF 1,2,4—TRIAZINES XIX THE ANOMALOUS SUBSTITUTED BENZENE SULFONATION AND PROPERTIES OF NUCLEOPHILIC ATTACK ON 6-CARBON OF 3.METHYLTHIO-5-HYDROXY-1,2,4-TRIAZINE

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Chinese Chemical Letters 1993年第9期4卷 771-774页

作者： Mei HAN Xu Ling SHI Zhen Jun YANG Meng Shen CAI Tie Ming CHENG school of Pharmaceutical sciences,beijing Medical {3.,beijing 100083

3.Methylthio-5-hydroxy-1,2,4-triazine(1c)reacted with substituted benzenesulfonyl chloride to give 3.methylthio-5-oxy-1,2,4-triazin-6-yl pyridinium betaine(4)in anhydrous *** when NaOH/H_2O/CH_3.OCH_3.or NaOH/CH_3.H were used as reactant and solvent,3.methylthio-4-substituted benzenesulfonyl-5-oxo-6-hydroxy-1,4,5,6-tetrahydro-1,2,4-triazine(6)or 1-tosyl-3.methylthio-5-oxo-6-methyloxy-1,4,5,6-tetrahydro-1,2,4-triazine(7)was obtained *** above reactions show anomalous properties of nucleophilic attack on 6-carbon in 1,2,4-triazine ring.

关键词： NaOH CHEMISTRY OF 1,2,4 TRIAZINES XIX THE ANOMALOUS SUBSTITUTED BENZENE SULFONATION AND PROPERTIES OF NUCLEOPHILIC ATTACK ON 6-CARBON OF 3.METHYLTHIO-5-HYDROXY-1,2,4-TRIAZINE

Reaction-diffusion processes

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Chinese Science Bulletin 1998年第17期43卷 1409-1420页

作者： CHEN Mufa beijing Normal university beijing 100875, China beijing Normal university Beijing China

The main progress made in the past dozen years or more in the study of reaction-diffusion (abbrev. RD) processes is surveyed. The processes are motivated from some typical models in the modern non-equilibrium statistical physics and consist of an important class of interacting particle systems which is currently an active research field in probability and mathematical physics. The models are concrete but as a part of the infinite-dimensional mathematics, the topic is quite hard. It is explained how new problems arise, and how some new ideas and new mathematical tools are introduced. Surprisingly, the mathematical tools produced from the study on the simple models then turn to have a lot of powerful applications not only in probability theory but also in other branches of mathematics. Nevertheless, the story is still far from finished, and some important open problems are proposed for further study.

关键词： Reaction-diffusion process ergodicity phase transitions coupling.

Identifying cancer genes from cancer mutation profiles by cancer functions

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Science China(Life sciences) 2008年第6期51卷 569-574页

作者： LI YanHui1, GUO Zheng1,2, PENG ChunFang2, LIU Qing2, MA WenCai2, WANG Jing2, YAO Chen2, ZHANG Min2 & ZHU Jing1 1 Bioinformatics Centre, school of Life Science, university of Electronic Science and Technology of China, Chengdu 610054, China 2.school of Bioinformatics Science and Technology, Harbin Medical university, Harbin 150086, China Bioinformatics Centre School of Life Science University of Electronic Science and Technology of China Chengdu China school of Bioinformatics Science and Technology Harbin Medical University Harbin China

It is of great importance to identify new cancer genes from the data of large scale genome screenings of gene mutations in cancers. Considering the alternations of some essential functions are indispensable for oncogenesis, we define them as cancer functions and select, as their approximations, a group of detailed functions in GO (Gene Ontology) highly enriched with known cancer genes. To evaluate the efficiency of using cancer functions as features to identify cancer genes, we define, in the screened genes, the known protein kinase cancer genes as gold standard positives and the other kinase genes as gold standard negatives. The results show that cancer associated functions are more efficient in identifying cancer genes than the selection pressure feature. Furthermore, combining cancer functions with the number of non-silent mutations can generate more reliable positive predictions. Finally, with precision 0.42, we suggest a list of 46 kinase genes as candidate cancer genes which are annotated to cancer functions and carry at least 3.non-silent mutations.

关键词： mutation profile cancer gene Gene Ontology gene function prediction

Extension of isometries on the unit sphere of l^p (Γ) space

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Science China Mathematics 2010年第4期53卷 1085-1096页

作者： FANG XiNian 1,& WANG JianHua 2 1 school of Mathematics and Statistics,Nanjing Audit university,Nanjing 210029,China 2 Department of Mathematics,Anhui Normal university,Wuhu 241000,China school of Mathematics and Statistics Nanjing Audit University Nanjing China Department of Mathematics Anhui Normal University Wuhu China

In this paper,we obtain that every isometry from the unit sphere S(l p (Γ)) of l p (Γ) (1 < p < ∞,p≠2) onto the unit sphere S(E) of a Banach space E can be extended to be a (real) linear isometry of l p (Γ) onto ... 详细信息

In this paper,we obtain that every isometry from the unit sphere S(l p (Γ)) of l p (Γ) (1 2) onto the unit sphere S(E) of a Banach space E can be extended to be a (real) linear isometry of l p (Γ) onto E,so,we give an affirmative answer to the corresponding Tingley’s problem.

关键词： isometric extension l p (Γ) space isometry 1-Lipschitz mapping