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Photocatalytic Oxidation Kinetics of Thiophene with Nano-F^-/Fe^(3+)/TiO_2

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china Petroleum Processing & Petrochemical Technology 2009年第4期11卷 48-52页

作者： Li Fatang~1 Sun Zhimin~1 Liu Ying~1 Zhao Dishun~2 Liu Ruihong~1 (1.college of science,hebei university of science and Technology,Shijiazhuang 050018 2.college of Chemical and Pharmaceutical Engineering,hebei university of science and Technology) college of science Hebei University of Science and Technology Shijiazhuang 050018 China college of Chemical and Pharmaceutical Engineering Hebei University of Science and Technology China

Photocatalytic oxidation kinetics of thiophene in n-octane/water extraction system was studied with fluorine and ferric ion codoped nano-TiO_2(nano-F^-/Fe^(3+)/TiO_2) powders used as the *** of initial concentration of thiophene and additional dosage of F^-/Fe^(3+)/TiO_2 on the reaction rate constant and half-life were *** results showed that the appropriately added dosage of F^-/Fe^(3+)/TiO_2 was 0.1 g in the 100-mL reaction system and the photooxidative kinetics of thiophene in the presence of F^-/Fe^(3+)/TiO_2 catalyst was of first-order with a rate constant of 0.6508 h^(-1) and a half-life of 1.0651 *** desulfurization rate of thiophene was 98.1%in 5 h and the sulfur content could be reduced from 800 ppm to 15 *** reaction rate constant increased with a decreasing initial concentration of thiophene.

关键词： desulfurization thiophene nano-F^-/Fe^(3+)/TiO_2 photocatalytic oxidation kinetics

Dynamic damage and stress-strain relations of ultra-high performance cementitious composites subjected to repeated impact

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science china(Technological sciences) 2010年第6期53卷 1520-1525页

作者： LAI JianZhong1 & SUN Wei2 1 Department of Materials science and Engineering,Nanjing university of science and Technology,Nanjing 210094,china 2 college of Materials science and Engineering,Southeast university,Nanjing 211189,china 1. Department of Materials science and Engineering Nanjing University of Science and Technology Nanjing 210094 China2. College of Materials Science and Engineering Southeast University Nanjing 211189 China

Ultra-high performance cementitious composites (UHPCC) were prepared by replacing 60% of cement with ultra-fine industrial waste *** dynamic damage and compressive stress-strain relations of UHPCC were studied using split Hopkinson pressure bar (SHPB).The damage of UHPCC subjected to repeated impact was measured by the ultrasonic pulse velocity *** show that the dynamic damage of UHPCC increases linearly with impact times and the abilities of repeated impact resistance of UHPCC are improved with increasing fiber volume *** stress waves on impact were recorded and the average stress,strain and strain rate of UHPCC were calculated based on the wave propagation *** effects of strain rate,fibers volume fraction and impact times on the stress-strain relations of UHPCC were *** show that the peak stress and elastic modulus decrease while the strain rate and peak strain increase gradually with increasing impact times.

关键词： ultra-high performance cementitious composites (UHPCC) split Hopkinson pressure bar (SHPB) repeated impact damage stress-strain

Minimal symmetric submanifolds in compact Riemannian symmetric spaces

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Chinese science Bulletin 1998年第21期43卷 1786-1789页

作者： LIANG Ke 1 and JIN Quanqin 1,2 1. Department of Mathematics, Nankai university, Tianjin 300071, china 2. Department of Mathematics, hebei university, baoding 071002, china Department of Mathematics Nankai University Tianjin China Department of Mathematics Hebei University Baoding China

A necessary and sufficient condition for a symmetric submanifold to be minimal in its ambient compact Riemannian symmetric space is given. By this condition a complete classification of non- minimal symmetric submanif... 详细信息

关键词： symmetric space symmetric submanifold mean curvature vector.

ARCHITECTURE OF MANUFACTURING EXECUTION SYSTEM IN THE EXTENDED ENTERPRISE

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Chinese Journal of Mechanical Engineering 2002年第1期15卷 90-93页

作者： Song Haisheng college of Electronic and Mechanical Engineering， hebei university of science and Technology，Shijiazhuang 050054，china Wang Jiahai Zhang Shu Tongji university college of Electronic and Mechanical Engineering Hebei University of Science and Technology Shijiazhuang 050054 China

The extended enterprise is formed according to the philosophy of dispersednetworked manufacturing. Manufacturing execution system (MES) can close the information gap whichexists between device control system and production information management system. The functions andthe web-based architecture of the MES in the extended enterprise are introduced. Using thecooperating system models of object-oriented and distributed agents and CORBA, all objects keep touniform interface standards and are easily inserted to object request broker. The utilization ofdistributed MES in extended enterprise can adapt fast change of manufacturing environment andresource. It also can improve the independent management capability of manufacturing cell and theenterprise response capability to global economic competition.

关键词： Extended enterprise Manufacturing execution system Dispersed networkedmanufacturing Agent

Genetic polymorphisms of milk epithelial mucin of yaks

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Progress in Natural science:Materials International 2006年第11期16卷 1222-1226页

作者： ZHENG Yucai~1, ZHAO Xingbo~2**, JIN Suyu~1, PENG Xianwen~1 and BAI Wenlin~1 (1. college of Life science and Technology, Southwest university for Nationalities, Chengdu 610041, china 2. State Key Laboratory for Agrobiotechnology and Ministry of Agriculture Key Laboratory of animal Genetics, Breeding and Reproduction, china agricultural university, Beijing 100094, china) [a]college of Life science and Technology Southwest University for Nationalities Chengdu China [b]State Key Laboratory for Agrobiotechnology and Ministry of Agriculture Key Laboratory of animal Genetics Breeding and Reproduction China Agricultural University Beijing China

Milk epithelial mucin (MUC1) of yaks was separated by SDS-polyacrylamide gel electrophoresis. A total of nine types of MUC1 were revealed in 427 yaks from five yak breeds including Maiwa yak, Jiulong yak, Tianzhu white yak, Qinghai yak and Tibetan yak. The molecular weights of MUC1 are from 163 kD to 208 kD, most of which are larger than those of bovine. Population genetic analysis shows that the gene frequency and genotype frequency of yak MUC1 differ among breeds, with relatively high gene heterozygosity. The five yak breeds studied fall into two groups according to their milk MUC1 gene frequency, suggesting that milk MUC1 exhibits specificities for local yak groups.

关键词： yak milk genetic polymorphism MUC1.

A New Measure of Diversity for Classifier fusion Based on Fuzzy Integrals

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A New Measure of Diversity for Classifier fusion Based on Fu...

Effects of chemical activation and season on birth efficiency of cloned pigs

2011年全国电子信息技术与应用学术会议

作者： Xuefei LI 1,Huimin FENG 2,Zhihua GU 1,Bin WANG 1 1 college of science,agricultural university of hebei,baoding 071001,china 2 college of Mathematics and Computer science,hebei university,baoding 071002,china

Diversity among the members of a classifiers ensemble is deemed to be a key issue in classifier fusion which is an efficient way to improve performance of classification ***,measuring diversity is not straightforward because there is no generally accepted formal *** paper proposed a new diversity measure and compared it with ten existing statistics through *** have examined the relationship between the accuracy of the ensemble and the measures of diversity through numerical *** the results the proposed diversity measure is more positive correlation than other ten existing.

关键词： fuzzy integral fuzzy measure classifier ensemble diversity

来源： cnki会议评论

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science china(Life sciences) 2009年第7期52卷 657-664页

作者： MA YuFang1,2,LI Yan3,WEI HengXi1,LI QiuYan3,FANG Rui1,ZHAO Rui3,ZHANG Kun1,XUE Kai1,LOU YanKun1,DAI YunPing3,LIAN LinSheng2 & LI Ning1 1 State Key Laboratory of Agrobiotechnology,college of Biological sciences,china agricultural university,Beijing 100193,china 2 college of animal science and Technology,china agricultural university,Beijing 100193,china 3 Beijing Genprotein Biotechnology Company,Beijing 100193,china 1. State Key Laboratory of Agrobiotechnology College of Biological Sciences China Agricultural University Beijing 100193 China 2. college of animal science and Technology China Agricultural University Beijing 100193 China 3. Beijing Genprotein Biotechnology Company Beijing 100193 China

The effects of chemical activation on birth efficiency of cloned pigs were studied by investigating the developmental process from porcine oocyte activation to birth of cloned *** different activation methods were used:(i) Electroporation(Ele);(ii) Ele followed by incubation with 6-dimethylaminopurine(6-DMAP);and(iii) Ele followed by a treatment with cycloheximide(CHX).In experiment 1,the rates of cleavage,developmental rates and cell number of porcine parthenogenetic(PA) embryos were investigated in the three treatment *** experiment 2,NT embryos produced by the three different activation treatments were compared for the rates of cleavage,development and cell ***,the effects of Ele and Ele+CHX activation methods on birth efficiency of cloned pigs were *** activated oocytes treated by combination activation generally showed a higher(P<0.05) blastocyst rate and produced more expanded blastocysts than oocytes activated with *** rates of cleavage and total cell number of parthenotes were not significantly *** embryos activated with 6-DMAP developed into blastocyst and expanded blastocyst stages at a significantly(P<0.05) higher rate than those treated with Ele,but the developmental capability was dramatically decreased in NT *** the CHX activation method,the NT embryo blastocyst rate was substantially(P<0.05) increased although the production of expanded blastocysts was not significantly different from that by the other two *** birth rate of cloned pigs increased in the CHX group,though the rate was not significantly different from *** effects of season on developmental rate of the porcine PA embryos and birth rate of cloned pigs were also examined in our *** oocytes collected in the spring had higher developmental capabilities than those collected in the ***,no difference in birth rate of the cloned pigs was found between the oocytes collected in the two *** re

关键词： parthenogenetic activation chemical activation nuclear transfer pig season

Three-dimensional elasticity solution of simple-supported rectangular plate on point supports, line supports and elastic foundation

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science china(Technological sciences) 2009年第3期52卷 584-589页

作者： XU YePeng1 & ZHOU Ding2 1 School of science, Nanjing university of science and Technology, Nanjing 210094, china 2 college of Civil Engineering, Nanjing university of Technology, Nanjing 210009, china 1. School of science Nanjing University of Science and Technology Nanjing 210094 China 2. college of Civil Engineering Nanjing University of Technology Nanjing 210009 China

This paper studies the bending of simple-supported rectangular plate on point supports, line supports and elastic foundation. On the basis of three-dimensional elasticity theory, the exact expressions of the displacement functions, which satisfy the governing differential equations and the simply supported boundary conditions at four edges of the plate, are analytically derived. The reaction forces of the in- termediate supports are regarded as the unknown external forces acting on the lower surface of the plate. The unknown coefficients are then determined by the boundary conditions on the upper and lower surfaces of the plate. Comparing the numerical results obtained from the proposed method to those obtained from Kirchhoff plate theory, Mindlin plate theory and those obtained from the commer- cial finite element software ANSYS, the high accuracy of the present method has been demonstrated.

关键词： rectangular plate point support line support elastic foundation displacement stress three-dimensional elasticity solution

潮土和潮褐土中重金属形态与土壤酶活性的关系

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土壤学报 2003年第4期40卷 581-587页

作者：刘霞刘树庆唐兆宏河北农业大学生命科学学院河北保定071001 河北农业大学资源与环境学院河北保定071001 河北省科学院微生物研究所河北保定071000

采用大田取样 ,运用连续提取方法 ,研究了河北平原潮土、潮褐土两种土壤中Cd、Pb的化学形态特征与四种土壤酶 (脲酶、H2 O2 酶、转化酶、碱性磷酸酶 )活性间的关系。结果表明 :大田两种土壤中交换态Cd、Pb对脲酶活性有显著抑制作用。因... 详细信息

采用大田取样 ,运用连续提取方法 ,研究了河北平原潮土、潮褐土两种土壤中Cd、Pb的化学形态特征与四种土壤酶 (脲酶、H2 O2 酶、转化酶、碱性磷酸酶 )活性间的关系。结果表明 :大田两种土壤中交换态Cd、Pb对脲酶活性有显著抑制作用。因此 ,在石灰性土壤中 ,把交换态Cd、Pb和脲酶活性共同作为评价土壤Cd。

关键词：潮土潮褐土重金属形态特征土壤酶活性镉铅