检索结果-南通市图书馆

Periodic blow-up solutions and their limit forms for the generalized Camassa-Holm equation

在线全文

学校读者我要写书评

暂无评论

Progress in Natural science:Materials International 2008年第3期18卷 259-266页

作者： Zhengrong Liu a, Boling Guob a School of Mathematical sciences, south china University of Technology, {3. 510640, china b institute of Applied Physics and Computational Mathematics, Beijing 100088, china School of Mathematical sciences South China University of Technology Guangzhou 510640 China institute of Applied Physics and Computational Mathematics Beijing 100088 China

In this paper, we consider the generalized Camassa-Holm equation ut+2kux-uxxt+ au~2ux=2uxuxx+uuxxxUnder substitution ξ=x-ct, some new explicit periodic wave solutions and their limit forms are presented through some special phase orbits. These periodic wave solutions tend to infinity on ξ-u plane periodically. Thus we call them periodic blow-up solutions. To our knowledge, such periodic blow-up solutions have not been found in any other equations.

关键词： Generalized Camassa–Holm equation Explicit solutions Periodic blow-up

A priori error analysis of a discontinuous Galerkin approximation for a kind of compressible miscible displacement problems

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

science china Mathematics 2010年第10期53卷 2679-2696页

作者： YANG JiMing1,& CHEN YanPing2 1College of science,Hunan institute of Engineering,Xiangtan 411104,china 2School of Mathematical sciences,south china Normal University,guangzhou 51063.,china College of science Hunan Institute of Engineering Xiangtan China School of Mathematical sciences South China Normal University Guangzhou China

A kind of compressible miscible displacement problems which include molecular diffusion and dispersion in porous media are investigated.A symmetric interior penalty discontinuous Galerkin (SIPG) method is applied to the coupled system of flow and *** the induction hypotheses instead of the cut-off operator and the interpolation projection properties,a priori hp error estimates are *** error bounds in L2(H1) norm for concentration and in L∞(L2) norm for velocity are optimal in h and suboptimal in p with a loss of power 1/2.

关键词： a priori error discontinuous Galerkin compressible miscible displacement coupled system

Epithermal Ageing Mechanism of Gussasphalt

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials science) 2009年第3期24卷 466-470页

作者：郝增恒 School of Traffic science and Engineering Harbin Institute of Technology Chongqing Communications Research and Design Instituts

The normal asphalt index test, DSR test, FTIR and the GPC distribution analysis of molecular weight on the extraction and recovery of asphalt of the gussasphalt, SMA extraction and recovery of asphalt and the rotary-thin-film-oven-aged asphalt above 240 ℃ were introduced. The results indicate the rutting factor and fatigue factor of the extraction and recovery of asphalt of the gussasphalt are greatly improved, and an obvious absorption peak of carbonyl and a further decrease of the SBS molecular weight of the gussasphalt are found.

关键词： gussasphalt epithermal ageing rheolagical performance fourier transforms infrared spectroscopy gel permeation chromatography

On the relationship between convection intensity of south china Sea summer monsoon and air-sea temperature difference in the tropical oceans

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2004年第2期23卷 267-278页

作者： LINAilan LIANGJianyin GUDejun WANGDongxiao guangzhouinstituteofTropicalandMarineMeteorologyofchinaMeterologicalAdministration Guangzhou510080China KeyLaboratoryofTropicalMarineenviromentaldynamics SouthChinaSeaInstituteofOceanologyChineseAcademyofSciencesGuangzhou510301China

The annual, interannual and inter-decadal variability of convection intensity of south china Sea (SCS) summer monsoon and air-sea temperature difference in the tropical ocean is analyzed, and their relationship is discussed using two data sets of 48-a SODA (simple ocean data assimilation) and NCEP/NCAR. Analyses show that in wintertime Indian Ocean (WIO), springtime central tropical Pacific (SCTP) and summertime south china Sea-West Pacific (SSCSWP), air-sea temperature difference is significantly associated with the convection intensity of south china Sea summer monsoon. Correlation of the inter-decadal time scale (above 10 a) is higher and more stable. There is inter-decadal variability of correlation in scales less than 10 a and it is related with the air-sea temperature difference itself for corresponding waters. The inter-decadal variability of the convection intensity during the south china Sea summer monsoon is closely related to the inter-decadal variability of the general circulation of the atmosphere. Since the late period of the 1970s, in the lower troposphere, the cross-equatorial flow from the southern Hemisphere has intensified. At the upper troposphere layer, the south Asian high and cross-equatorial flow from the Northern Hemisphere has intensified at the same time. Then the monsoon cell has also strengthened and resulted in the reinforcing of the convection of south china Sea summer monsoon.

关键词： tropical oceans air-sea temperature difference south china Sea summer monsoon convection, Convec-tion intensity

High-nitrogen and low-irradiance can restrict energy utilization in photosynthesis of successional tree species in low subtropical forest

在线全文

学校读者我要写书评

暂无评论

science china(Life sciences) 2008年第7期51卷 592-603页

作者： CAI Xi’An,SUN GuChou,ZHAO Ping &LIU XiaoJing south china institute of Botany,Chinese Academy of {3.s,guangzhou 510650,china south china institute of Botany Chinese Academy of Sciences Guangzhou China

Responses of photosynthesis and the partition of energy utilization to high-nitrogen importation and high-light intensity in leaves of three dominant tree species of subtropical forest,including sun plant or early-successional species Schima superba,mesophyte or intermediate-successional species Canstanopsis hystrix,and shading-tolerant plant or late-successional species Cryptocarya concinna were studied by using the CO2 exchange system and chlorophyll fluorescence *** results showed that,regardless of plant species,net photosynthetic rate(Pn)was higher in high-nitrogen supply and high irradiance(HNHL)plants than in low-nitrogen supply and high irradiance(LNHL)plants,implying that low-nitrogen importation would limit Pn of plants grown under high ***, high-nitrogen supply and low irradiance(HNLL)plants had a lower *** change of quantum yield(Fv′/Fm′)in opened PS II was found in leaves of HNHL,LNHL or HNLL plants of *** and C. hystrix,while a higher Fv′/Fm′occurred in HNHL plants of *** in comparison with LNHL or HNLL *** HNHL plants of *** also had a higher photochemical quantum yield(△F/Fm′) than LNHL or HNLL plants,however no similar responses were found in plants of *** and C. hystrix(P0.05)and it was significantly higher than in HNLL plants(P<0.05).*** also had a similar response inφ PSII to nitrogen supply and *** of species HNLL plants had a significantφ PSII and higher heat dissipation in light,and this effect was more severe in *** than in *** or *** results may mean that high-nitrogen importation by nitrogen deposit and low irradiance caused by changing climate or air pollution would more severely restrict photosynthetic processes in the late-succ

关键词： low subtropical forest successional plant high nitrogen concentration partition of photosynthetic energy

Analysis of Road Base Uniformity via the Deviation of Modulus of Asphalt Mixtures

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials science) 2007年第2期22卷 367-370页

作者：职雨风 Road Research institute South China University of Technology

The modulus deviation of base material calculated from the data of falling weight deflectometer （FWD） was used to evaluate the uniformity of road base so as to reflect the construction quality. Four parameters,the repeatability standard deviation of the data in the same driveway, the reproducibility standard deviation of the data in the different driveway, the consistency statistics value of the data in the different driveway, and the consistency statistics value of the data in the same driveway, were introduced for the construction uniformity analysis. The experimental result shows that the materials modulus calculated from FWD has a highly correlative relationship with the uniformity of road base.

关键词： road base material modulus falling weight deflectometer (FWD)

Genistein stimulates osteoblastic differentiation via p3. MAPK-Cbfa1 pathway in bone marrow culture

在线全文

学校读者我要写书评

暂无评论

Acta Pharmacologica Sinica 2007年第10期28卷 1597-1602页

作者： Qing-chuan LIAO~2,Zhou-sheng XIAO~(4,5),Yan-fang QIN~3.Hong-hao ZHOU~4~2 Affiliated Children's Hospital,Nanjing Medical University,Nanjing 210008,china,~3.Department of Pathology,School of Medicine,JinanUniversity,guangzhou 51063.,china ~4 {3. of Clinical Pharmacology,Central south University,Changsha 410078,china Affiliated Children's Hospital Nanjing Medical University Nanjing China institute of Clinical Pharmacology Central South University Changsha China Department of Pathology School of Medicine Jinan University Guangzhou China

Aim:To test the hypothesis that genistein stimulates the osteoblastic differentia-tion through the p3. mitogen activated protein kinase (MAPK)-core-binding fac-tor 1 (Cbfa1) ***:The activation of p3. MAPK was detected byWestern *** phosphatase (ALP) activity and calcium depositionwere assessed for osteoblastic differentiation of bone marrow-derived mesenchy-mal stem cell (BMSC) *** expression of Cbfa1 was analyzed at both themRNA and protein *** activity of Cbfa1 was detected by electrophoreticmobility shift *** sialoprotein (BSP),ALP,osteocalcin (OC),andosteopontin (OPN) gene transcription were also evaluated by either RT-PCR orNorthern ***:Genistein (0.01-1 μmol/L) dose dependently led tothe rapid and sustained activation of the p3. MAPK pathway in mouse *** with genistein (1 μmol/L) resulted in increased ALP activityand calcium deposition of BMSC cultures as a function of *** alsoenhanced Cbfa1 DNA binding activity and promoted the expressions of Cbfa1itself as well as several Cbfa1-regulated genes,including ALP,BSP,OC,and *** treatment with p3. MAPK inhibitor (SB203.80) diminished thegenistein-induced osteoblastic maturation and p3. MAPK-Cbfa1 activation inmouse BMSC ***:These results indicated that genistein couldstimulate the osteoblastic differentiation of BMSC cultures through the p3.MAPK-Cbfa1 pathway.

关键词： bone marrow-derived mesenchymal stem cells core-binding factor 1 osteoblastic differentiation genistein mitogen-activated protein kinase

Possible Effect of 3.K Proteins in Embryonic Development of Silkworm Bombyx mori

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Biochimica et Biophysica Sinica 2005年第5期37卷 355-361页

作者： Bo-Xiong ZHONG~1 Jian-Ke LI~(1.2) Jian-Rong LIN~3.Jian-She LIANG~4 Song-Kun SU~1 Hai-Sheng XU~1 Hai-Yan YAN~1 Ping-Bo ZHANG~5 Hiroshi FUJII~5 1 Laboratory of Molecular Biology of Silkworm and Honeybee, Department of Bioresource science, College of Animal science,Zhejiang University, Hangzhau 3.0029, china 2 {3. of Apicultural Research, Chinese Academy of Agricultural science, Beijing 100093. china 3.Department of Sericulture, south china Agricultural University.guangzhou 510642, china 4 Biochemistry Co. Ltd. of Zhejiang University, Hangzhou 3.0029. china 5 Faculty of Agriculture,Kyushu University, Fukuoka 812-81. Japan Laboratory of Molecular Biology of Silkworm and Honeybee Department of Bioresource Science College of Animal Science Zhejiang UniversityHangzhou 310029 China institute of Agicultural Research Chinese Academy of Agricultural ScienceBeijing 100093 China Department of Sericulture South China Agricultural UniversityGuangzhou 510642 China Biochemistry Co. Ltd. of Zhejiang UniversityHangzhou 3.0029 China Faculty of Agriculture Kyushu UniversityFukuoka 812-81 Japan

The silkworm Bombyx mori possesses a 3.K protein family of 3.10～4 Da,the biologicalfunctions of which have not been fully *** relationship between the 3.K protein family and theembryonic development of temperature sensitive sex-linked mutant strain of silkworm was investigated bytwo dimensional polyacrylamide gel electrophoresis(2D-PAGE)and Matrix assisted laser desorption ionization-time of flight mass spectrometry(MALDI-TOF MS).The results show that protein spots 1-5 of the 3.Kprotein family,mainly existing in normal strain,are possibly related to embryonic *** earlyconsumption of a 3.K protein named 6G1-3.K-1 and the accumulation of 3.K proteins named 6G1-3.K-3.nd 6G1-3.K-4 are likely caused by the destruction of physiological balance in normal embryonic development,which may lead to lower hatchability of the temperature sensitive *** results suggest that reasonablemetabolism of 3.K proteins is a prerequisite for the embryo's normal development.

关键词： silkworm Bombyx mori 3.K protein embryonic development 2D-PAGE MALDI-TOF MS

The pilot test of Pt-Pd and Pt-Rh feeds extracted and sep.rated with a new sulfoxide extractant

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2006年第2期25卷 99-105页

作者： ZHU Ping GU Guobang QU Zhiping HUANG Yanfei YAO Wenxue College of environment science and Engineering Shanghai University Shanghai 200072 China Department of Applied Chemistry South China University of Technology Guangzhou 510640 China institute of Material Reutilization of the Ministry of Internal Trade. Xuzhou 221006. china

Platinum, palladium and rhodium of the raw feeds extracted and sep.rated with a new sulfoxide extractant （MSO） were studied in the paper. The pilot test results showed that the percentage extractions are more than 99% for platinum and palladium in Pt-Pd feed, and the percentage strippings are 100% and 99.2% with HCl and ammonia, respectively. The ratio of palladium to platinum is 0.0016 in stripping platinum solution, and the ratio of platinum to palladium is 0.0020 in stripping palladium solution. The percentage extraction of platinum is 99% in Pt-Rh feed, and the percentage stripping is 100%. The ratio of rhodium to platinum is 0.0002 in stripping platinum solution. Therefore, platinum, palladium, and rhodium feeds are sep.rated effectively with MSO.

关键词： solvent extraction pilot test sulfoxide platinum group metals