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Harmonic maps with potential from complete manifolds

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Chinese Science Bulletin 1998年第21期43卷 1780-1786页

作者： chen Qun mathematics Department, Central china normal university, Wuhan 430079, china institute of mathematics, fudan university, shanghai 200433, china mathematics Department Central China Normal University Wuhan China institute of mathematics Fudan University Shanghai China

Harmonic maps with potential from complete manifolds are considered. This is a new kind of maps more general than the usual harmonic maps relating to many interesting problems such as equilibrium system of ferromagnetic spin chain and Neumann motion. Aiming at the general properties, the author derives basic gradient estimates and then Liouville type results for these maps, which are interesting in constrast to those of the usual harmonic maps for the presence of potentials.

关键词： harmonic maps potential ferromagnetic chain gradient estimate.

Fredholm operators in Toeplitz algebras associated with discrete abelian groups

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Chinese Science Bulletin 1998年第14期43卷 1175-1179页

作者： XU Qingxiang 1 and chen Xiaoman 2 1. Department of mathematics, shanghai normal university, shanghai 200234, china 2. Laboratory of mathematics for Nonlinear Sciences and institute of mathematics, fudan university, shanghai 200433, china Department of mathematics Shanghai Normal University Shanghai China Laboratory of mathematics for Nonlinear Sciences and institute of mathematics Fudan University Shanghai China

The locally finite below sets are introduced and the Fredholm operators in Toeplitz algebras associated with discrete abelian groups are studied.

关键词： discrete abelian group quasi_ordered group Toeplitz operator Fredholm operator.

Speciation of the elements and compositions on the surfaces of dust storm particles:The evidence for the coupling of iron with sulfur in aerosol during the long-range transport

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Chinese Science Bulletin 2005年第8期50卷 738-744页

作者： ZHANG Xingying1,2, ZHUANG Guoshun1,2,3, chen Jianmin2 & XUE Huaxin2 1. Center for Atmospheric Environment Study, Department of Chemistry, Beijing normal university, Beijing 100875, china 2. Center for Atmospheric Chemistry Study, Department of Environ- mental Science and Engineering, fudan university, shanghai 200433, china 3. LApC/NZC, institute of Atmospheric physics, NZC/LApC, Chinese Academy of Sciences, Beijing 100029, china Center for Atmospheric Environment Study Department of Chemistry Beijing Normal University Beijing 100875 China Center for Atmospheric Chemistry Study Department of Environmental Science and Engineering Fudan University Shanghai 200433 China LApC/NZC Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

The speciation of the elements on the surface of the particles collected during dust storm and non-dust storm in Beijing and Inner Mongolia was studied by XpS. The ma- jor species of iron on the surface were oxides, sulfate, silicate, FeOOH and minor part sorbed on SiO2/Al2O3. Sulfate is the dominant species of sulfur on the surface. SiO2 and Al2O3 are the main components of Si and Al on the surface respectively. One of the most important findings was that the Fe(II) (FeS and FeSO4) produced could account for up to 44.3% and 45.6% of the total Fe on the surface in the aerosol sample collected at that night and next day of the “peak” time of the dust storm occurring on March 20, 2002, while Fe2(SO4)3, one of the Fe(III) species on the surface decreased from 67.1% to 49.5% and 48.0% respectively. Both S and Fe en- riched on the surface of aerosol particles. Fe(II) accounted for 1.3%?5.3% of total Fe in bulk aerosol samples during dust storm. These results provided strong evidence to sup- port the hypothesis of the coupling between iron and sulfur in aerosols during the long-range transport, which would have important impact on the global biogeochemical cycle.

关键词：物种形成原理 XpS 大气悬浮物 Fe-S结合粒子集合

Can transgenic rice cause ecological risks through transgene escape?

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progress in Natural Science:Materials International 2003年第1期 19-26页

作者： LU Baorong , SONG Zhiping and chen Jiakuan(Ministry of Education Key Laboratory for Biodiversity and Ecological Engineering, institute of Biodiversity Science, fudan university, shanghai 200433, china) Ministry of Education Key Laboratory for Biodiversity and Ecological Engineering Institute of Biodiversity Science Fudan University Shanghai 200433 China

Abstract Alien transgene escape from genetically engineered rice to non-transgenic varieties or close wild relatives (includingweedy rice) may lead to unpredictable ecological risks. However, for transgene escape to occur three conditions need to be met: (i) spa-tially, transgenic rice and its non-transgenic counterparts or wild relatives should have sympatric distributions; (ii) temporally, the flower-ing time of transgenic rice and the non-transgenic varieties or wild relatives should overlap; and (iii) biologically, transgenic rice and itswild relative species should have such a sufficiently close relationship that their interspecific hybrids can have normal generative reproduc-tion. This paper presents research data on the geographic distribution, flowering habits, interspecific hybridization, and gene flow of culti-vated rice (Oryza sativa) and its closely related wild relatives containing the AA genome. The objective is to estimate the possibility oftransgene escape to non-transgenic rice varietie

关键词： oryza species transgene escape biosafety ecological risk introgression gene flow.

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5种药用芦荟中芦荟甙含量的测定

西南师范大学学报（自然科学版） 2001年第6期26卷 709-711页

作者：廖志华陈敏谈锋复旦大学遗传学研究所上海200433 复旦大学药学院上海200433 西南师范大学生命科学学院重庆400715

对库拉索芦荟、木立芦荟、好望角芦荟、中华芦荟和皂质芦荟 5种药用芦荟中芦荟甙的含量进行了定量的测定 ,发现全叶干粉中芦荟甙含量差异显著 ,含量高低依次为 :库拉索芦荟、木立芦荟、好望角芦荟、中华芦荟、皂质芦荟 ;而以鲜质量计算... 详细信息

对库拉索芦荟、木立芦荟、好望角芦荟、中华芦荟和皂质芦荟 5种药用芦荟中芦荟甙的含量进行了定量的测定 ,发现全叶干粉中芦荟甙含量差异显著 ,含量高低依次为 :库拉索芦荟、木立芦荟、好望角芦荟、中华芦荟、皂质芦荟 ;而以鲜质量计算芦荟甙含量 ,发现库拉索芦荟、木立芦荟和好望角芦荟中芦荟甙含量接近。

关键词：库拉索芦荟木立芦荟好望角芦荟中华芦荟皂质芦荟芦荟甙含量测定药用芦荟

ON THE GrOWTH OF SOLUTIONS OF A CLASS OF HIGHEr OrDEr DIFFErENTIAL EQUATION

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Annals of Differential Equations 2007年第1期23卷 35-44页

作者： Kang Yueming chen Zongxuan cheng Tao institute of Math. Fudan University Shanghai 200433 Depl of Math. South China Normal University Guangzhou 510631 Dept. of Math. Jiangxi Normal University Nanchang 330027

In this paper, a class of higher order linear differential equation is investigated. The order and the hyper-order of the solutions of the equation are exactly estimated under some certain conditions.

关键词： linear differential equation the growth of order hyper-order entire function

Changed clinical aspects of primary liver cancer in china during the past 30 years

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Hepatobiliary & pancreatic Diseases International 2004年第2期3卷 194-198页

作者： Bing-Hui Yang, Jing-Lin Xia, Li-Wen Huang, Zhao-You Tang, Ming-Shan chen, Jin-Qing Li, An-Min Liang, Qin-Guo Mo, Hui-Shan Lu, Chao-Liu Dai, Lu-Nan Yan, Zhi-Jian Yu, rong-Sheng rao, Le-Qun Li, Zhi-Xiong Su, Zhuang-Wei Fang shanghai, china Liver Cancer institute & Zhongshan Hospital, fudan university, shanghai 200032, china Tumor Hospital, Zhongshan university, Guangzhou 510000, china Tumor Hospital, Guangxi Medical Universi- ty, Nanning 530000, china Xiehe Hospital, Fujian Medical university, Fuzhou 350000, china Second Hos- pital, Chinese Medical university, Shenyang 110000, china Huaxi Hospital, Sichuan university, chengdu 610041, china Hospital Affiliated to Nantong Medical university, Nantong 226000 , china Second Hospital, Jiangxi Medical university, Nanchang 330000 , china First Hospital Affiliated to Guangxi Medical university, Nanning 530000 , china people’s Hospital of Hainan province, Haikou 570000, china Liver Cancer institute & Zhongshan Hospital Fudan University Shanghai 200032 China. bhyang@zshospital. net

BACKGrOUND: primary liver cancer (pLC) is one of the most frequently seen tumors in china. Thirty years ago, patients with pLC were often detected at relatively late stage, with a palpable mass or marked clinical symptoms and poor prognosis. In the past 30 years, the diagnosis and treatment of pLC have been greatly improved with better prognosis. METHODS: In order to study the changes of pLC during the 30 years, the clinical data of 3250 patients with pLC from 10 medical institutions of china were collected, ana- lyzed , and compared with those of 3254 pLC patients be- fore the 30 years. rESULTS: In the 3250 patients aged 1-80 years, with an average age of 49.1 years, the male to female ratio (2.3:1) was lower than that before the 30 years. 73.5% of the 3250 patients sought medical advice within 3 months after the onset of the disease in contrast to 63.8% before the 30 years. Compared with those patients before the 30 years the symptoms and signs were alleviated generally. The HBsAg positive rate was 81.0%, but the HCV-Ab positive rate was 13.2%. The AFp level in 75% of patients was elevated, but in the remaining 25% was normal. 1912 patients (58.8%) were confirmed pathologically. Among them 1755 patients (91.8%) had hepatocellular carcinoma. The overall resec- tion rate was 46.3%. Those who had early, middle, late stage carcinoma accounted for 29.9%, 51.5%, and 18.6%respectively in contrast to 0.4%, 47.0%, and 52.6% repor- ted before the 30 years. The 1-, 3-, 5-year survival rates of the patients were 66.1%, 39.7%, and 32.5% respectively, whereas 93.5%, 70.1%, and 59.1% for the early stage pa- tients, and 65.3%, 30.5%, and 23.5% for the middle stage patients. The half and 1-year survival rates of the late stage patients were 52.5%, and 14.7%, respectively. CONCLUSION: Comparison with the clinical data before and after the 30 years show that pLC can be diagnosed ear- ly. More pLC patients tend to undergo resection while re- ceiving a better conservative treatment, w

关键词： primary liver cancer diagnosis therapy survival rate

体元模型动态三维重建超声显像定量测定右心功能

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复旦学报（医学版） 2003年第5期30卷 448-450,459,F003页

作者：杨茗沈学东舒先红陈世波潘翠珍张煜复旦大学附属中山医院心内科-上海市心血管病研究所上海200032

目的　建立多平面经食管体元模型动态三维重建超声显像测定右心功能的方法 ,评价肺动脉高压对右心室形态和功能的影响。方法　将 34例各种原因引起的肺动脉高压患者 ,按疾病对右心室产生的负荷性质分为以容量和压力负荷过重为主两组 ,... 详细信息

目的　建立多平面经食管体元模型动态三维重建超声显像测定右心功能的方法 ,评价肺动脉高压对右心室形态和功能的影响。方法　将 34例各种原因引起的肺动脉高压患者 ,按疾病对右心室产生的负荷性质分为以容量和压力负荷过重为主两组 ,分别测定其右室容积和游离壁质量 ,并计算射血分数 ;15例正常人为对照组。结果　三维重建后可动态地、多角度地观察右心室的形态和收缩、舒张活动。与正常人比较 ,肺动脉高压患者的右室较为饱满 ,心尖部和流出道的活动程度低于正常人。定量分析发现 ,肺动脉高压患者的右室腔和游离壁各指标均大于正常人 ,差异有显著意义 (p p p >0 .0 5 )。结论　多平面经食管超声体元模型动态三维重建能用于临床评价肺动脉高压患者右室腔容积、游离壁质量和右室射血分数指标 ,为临床评价右心功能、估计疾病的严重程度、治疗效果和患者的预后提供定量依据。

关键词：右心功能肺动脉高压体元模型动态三维重建超声显像测定

超长波GaAs/AlGaAs量子阱红外探测器光电流谱特性研究

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物理学报 2003年第2期52卷 503-507页

作者：袁先漳陆卫李宁陈效双沈学础资剑温州师范学院物理与电子信息科学系温州325027 中国科学院上海技术物理研究所红外物理国家实验室上海200083 复旦大学应用表面物理国家重点实验室上海200433

研究了响应波长在 15 μm附近的超长波GaAs AlGaAs量子阱红外探测器在不同外加偏压下的光电流谱特性 .光电流谱上的两个主要由于阱宽随机涨落而呈现为高斯线形的响应峰被分别指认为量子阱基态E0 到第一激发态E1 和第三激发态E3的跃迁 .... 详细信息

研究了响应波长在 15 μm附近的超长波GaAs AlGaAs量子阱红外探测器在不同外加偏压下的光电流谱特性 .光电流谱上的两个主要由于阱宽随机涨落而呈现为高斯线形的响应峰被分别指认为量子阱基态E0 到第一激发态E1 和第三激发态E3的跃迁 .跃迁峰随着器件上外加偏压的增大而出现线性红移现象 ,认为这种变化起源于激发态与基态对量子阱结构中势变化敏感性的不同 ,采用传输矩阵方法并考虑到电子交互作用修正进行的理论计算在定量上解释了实验结果 .

关键词： GaAs/AlGaAs 光电流谱特性量子阱红外探测器超长波传输矩阵砷化镓砷镓铝三元化合物