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Kac-系统与Morita等价

数学学报（中文版） 2003年第5期46卷 943-950页

作者：张小霞郭懋正王永革烟台大学数学系北京大学数学系北京100871 北京航天航空大学应用数学系北京100083

本文讨论与Hilbert C*-模相关的Kac-系统在C*-代数上的作用的性质,给出了两个Morita等价的C*-代数(在Kac-系统的作用下得到的C*-代数的余交叉积是Morita等价的).从而,Baaj和Skandalis等人的结论是本文定理的特殊情况.

关键词： Hilbert C*-模 Kac-系统 Morita等价余交叉积

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INFERENCE IN A SIMPLE CHANGE-POINT MODEL

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Science in china,Ser.A 1988年第6期 654-667页

作者：陈希孺 graduate School university of Science and Technology of china beijing

For the change-point model allowing at most one change X（i/n）=f（i/n）+e（i/n）, where f（t）=α+θI(（t0,1]）（t）, O≤t≤1, e（1/n）,…, e（n/n） are independently and identically distributed, the problem of testing and interval estimation about the change-point t0, the magnitude of jump θ and the variance σ2.of random error e（t）, is considered.

关键词： INFERENCE IN A SIMPLE CHANGE-POINT MODEL

Coadaptation of thermal preference and sensitivity in response to low temperatures in a stream-dwelling turtle(Platysternon megacephalum)

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Coadaptation of thermal preference and sensitivity in respon...

第七届全国野生动物生态与资源保护学术研讨会

作者： Wei-Guo Du~(*1)Jian-Wei Shen~2.Bo Sun~2.Yong-Pu Zhang~3 (1 Key Laboratory of Animal Ecology and Conservational Biology,Institute of Zoology,chinese academy of {2.,beijing,100101,People’s Republic of china. 2.Department of Environmental {2.,School of Life {2.,Hangzhou Normal university,310036, Hangzhou,Zhejiang,People s Republic of china:3College of Life and Environmental {2., Wenzhou university,32.02.,Wenzhou,Zhejiang,People’s Republic of china)

Thermal adaptation theory predicts that thermoregulative behavior and thermal sensitivity of functional performance should be coadapted in response to certain temperature ***,evidence from empirical studies is *** carried out field and laboratory investigations to determine the adaptive responses of thermal preference and thermal sensitivity of functional performance to the thermal environment in a stream-dwelling turtle (Platysternon megacephalum).The body temperatures of the turtles conformed to the water temperature,with little diel variation in both summer and *** preferred body temperatures(T)and critical thermal maximum and minimum were 2..5℃,36.4℃and 5.4℃, *** assimilation and growth of the turtles were enhanced by ambient temperatures ranging from 16 to 2.℃,but hampered by thermal environments that mimicked basking(temperature range,19-30℃).The thermal sensitivity of growth rate differed from that of locomotion;growth was maximized at 2.℃,whereas locomotor performance was at 30℃. Consequently,T was more closely related to the thermal sensitivity of growth rate than that of *** thermal preference and thermal optimum of growth,which are closely related to the turtles’ fitness,are coadapted in response to low *** contrast,the evolution of thermal sensitivity of locomotion lags behind,probably because locomotion is not closely related to fitness in turtles or due to evolutionary constraints.

关键词： Body temperature Growth rate Platysternon megacephalum Thermoregulatory behavior Thermal physiology Thermal adaptation

Nest-building Behavior Promotes Male Offspring Bodyweight Development and Survival Ratio in Root Vole

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Nest-building Behavior Promotes Male Offspring Bodyweight De...

第九届中国实验动物科学年会（2.10新疆）

作者： SUN Ping~(1,2.),XIONG Jianli~1,ZHU Wenwen~1,ZHAO Xinquan~3,WANG Dehua~2.(1.Henan university of Science and Technology,Animal Science and Technology College,Luoyang 471003, china) (2.State Key Laboratory of Integrated Management of Pest Insects and Rodents,Institute of Zoology, {2. academy of sciences,beijing 100101,china) (3.Northwest Plateau Institute of Biology,the {2. academy of sciences,Xining,810008,china)

Objective Wild root voles make nest in the field because of the cold winter and the low temperature in summer *** bred in laboratory,most of them can make nest ***,part of root voles do not make nest *** test the hypothesis that nest-building is an important thermoregulatory behavior to promote the high fitness of the parents even in the normal temperature conditions(at 2.±2.),two experiments were ***Ⅰ:Thirty mating pairs including fifteen nest-building and fifteen non-nest-building,were selected in this experiment,with access to 5.3g of cotton to build a nest,for a period of 30 *** temperatures in nest-building and non-nest-building groups,in and above nest with animals or without animals,and the changes of temperature during 60min period were ***Ⅱ: Twenty-four broods’ offspring were used in this *** body weight of natal day and weaning day,number and age in day of infanticide were *** results showed the average temperature in nest-building group was significantly higher than non-nest-building *** contrary,average temperature above nest of nest-building group was lower than non-nest-building *** body weight of natal day had no difference between nest-building group and non-nest-building group but average body weight of weaning day had significant difference between nest-building group and non-nest-building *** were significant differences in male offspring’s average body weight between nest-building and non-nest-building from 2.to 14 age in *** results indicated that nest-building has significant influence on parents’ fitness in root vole bred in laboratory.

关键词： root vole nest-building fitness Qinghai-Tibeat Plateau thermoregulation infanticide

Grhl2.is essential for otic development and hearing by promoting claudin b and epcam expression

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Grhl2 is essential for otic development and hearing by promo...

“细胞活动生命活力”——中国细胞生物学学会全体会员代表大会暨第十二次学术大会

作者： Yanchao Han~1,Yu Mu~2.Xiaoquan Li~2.Pengfei Xu~1,Jingyuan Tong~1,Zhaoting Liu~3,Tingting Ma~1,Guodong Zeng~1, Shuyan Yang~1,Jiulin Du~2.and Anming Meng~(1,3) 1.State Key Laboratory of Biomcmbranc and Membrane Engineering,School of Life sciences,Tsinghua university,{2. 100084,china 2.Institute of Neuroscicncc and State Key Laboratory of Neuroscience,Shanghai Institutes for Biological sciences,chinese academy of sciences,Shanghai 2.0031,china 3.State Key Laboratory of Biomcmbranc and Membrane Engineering,Institute of Zoology,chinese academy of sciences,{2. 100101,china

Congenital and progressive hearing impairment is a common distressing *** progressive dominant hearing loss DFNA2. in human is associated with a frameshift mutation of Grainyhead-like 2.GRHL2. but its etiology and mechanism remain *** we report a zebrafish grhl2. mutant line,in which grhl2. expression is interrupted by an insertion of a Tol2.transposon *** mutants exhibit enlarged otocysts,smaller or eliminated otoliths,malformed semicircular canals,insensitiveness to sound stimulation,and imbalanced swimming *** Grainyhead-like family members can regulate epithelial adhesion,we examined the expression of some genes encoding junction proteins in *** show that the expression of claudin b(cldnb) and epcam is abolished or dramatically reduced and apical junctional complexes are abnormal in otic epithelial cells of mutant *** of cldnb and epcam mRNA could largely rescue the mutant *** of human wild-type GRHL2.mRNA but not the mutant GRHL2.mRNA derived from DFNA2. patients into grhl2. mutant embryos could rescue the inner ear ***,we demonstrate that Grhl2. directly binds to the enhancers and promotes the expression of cldnb and ***,this work reveals an evolutionary conserved function of Grhl2.in otic development and provides a fish model for further studying mechanisms of Grhl2.related hearing loss.

关键词： inner ear hearing grainyhead-like 2 mutant zebrafish apical junctional complex

甩带Fe_(85)Ga_(15)合金的巨磁致伸缩研究

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物理学报 2004年第9期53卷 3191-3195页

作者：刘国栋李养贤胡海宁曲静萍柳祝红代学芳张铭崔玉亭陈京兰吴光恒河北工业大学材料学院天津300130 中国科学院物理研究所磁学国家重点实验室北京100080

利用甩带快淬方法制备了Fe85Ga1 5合金样品 .测量了样品在沿带片长度方向和厚度方向上的磁致伸缩 ,发现其值分别高达 - 1 30 0ppm和 +1 1 0 0ppm .巨大磁致伸缩的获得来源于甩带样品的形状各向异性和合金内部生成的大量短程应变有序以... 详细信息

利用甩带快淬方法制备了Fe85Ga1 5合金样品 .测量了样品在沿带片长度方向和厚度方向上的磁致伸缩 ,发现其值分别高达 - 1 30 0ppm和 +1 1 0 0ppm .巨大磁致伸缩的获得来源于甩带样品的形状各向异性和合金内部生成的大量短程应变有序以及它们的择优取向 .样品温度特性的测量表明 ,在室温附近约 6 0℃宽的温度范围 ,合金的磁致伸缩数值基本保持不变 ;而在高温条件下。

关键词：磁致伸缩材料 Fe-Ga合金甩带快淬法结构取向功能材料

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Effective photon mass in nuclear matter and finite nuclei

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Effective photon mass in nuclear matter and finite nuclei

CCAST“不稳定核反应”研讨会

作者： Bao-Xi Sun, Xiao-Fu Lu, Peng-Nian Shen, En-Guang Zhao Institute of High Energy Physics. The chinese academy of {2., P.O.Box 918(4), beijing 100039. china Institute of Theoretical Physics, The chinese academy of {2., beijing 100080, china Department of Physics, Sichuan university, Chengdu 610064, china. Center of Theoretical Nuclear Physics. National Laboratory of Heavy ion Accelerator,Lanzhou 730000, china Department of Physics, Tsinghua university, beijing 100084, china and china Center of Advanced Science and Technology (World Laboratory), beijing 100080, china

＜正＞ Electromagnetic field in nuclear matter and nuclei are studied In the nuclear matter,because theexpectation value of the electric charge density operator is not zero,different in vacuum,the U（1）local gauge symmetry of electric charge is spontaneously broken and consequently,the photon gainsan effective mass through the Higgs mechanism An alternative way to study the effective mass of

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Backstepping and Nonlinear Internal Model Based Attitude Tracking and Disturbance Rejection

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Backstepping and Nonlinear Internal Model Based Attitude Tra...

第二十九届中国控制会议

作者： ZHANG Xuxi1,3,CHENG Daizhan2.1.Control and simulation center,Harbin Institute of Technology,Harbin,150001,P.R.china2.academy of Mathematics and Systems Science,{2. academy of sciences,beijing 100190,P.R.china3.College of Science,Harbin Engineering university,Harbin,150001,P.R.china

＜Abstract＞In this paper,we consider the attitude tracking and disturbance rejection problem of rigid spacecraft using back-stepping and nonlinear internal model *** Modified Rodrigues Parameters is used as kinematic variables of the rigid spacecraft,which allows principal angle rotations up to 360°.By applying the backstepping design method,we design the Lyapunov function candidate recursively and design the control law *** disturbance is handled by a nonlinear internal model,which include the linear internal model as a special case.A numerical example is also given to illustrate the theoretical result presented in this paper.

关键词： Backstepping,Nonlinear Internal Model,Attitude Tracking Disturbance Rejection

停服棉酚后恢复的大鼠精母细胞DNA合成的研究

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解剖学报 1995年第1期26卷 63-66页

作者：张世馥叶百宽中国医学科学院基础医学研究所北京中医药大学组织学与胚胎学教研室

用细胞淘析分离技术分离出经棉酚处理后的大鼠粗线期精母细胞，用＾３Ｈ－胸腺嘧啶核苷参入法检测棉酚对ＤＮＡ合成的影响。结果表明，饲服棉酚３、４、６、７和８周后，大鼠粗线期精母细胞的ＤＮＡ合成明显低于对照组，分别降低１４％... 详细信息

用细胞淘析分离技术分离出经棉酚处理后的大鼠粗线期精母细胞，用＾３Ｈ－胸腺嘧啶核苷参入法检测棉酚对ＤＮＡ合成的影响。结果表明，饲服棉酚３、４、６、７和８周后，大鼠粗线期精母细胞的ＤＮＡ合成明显低于对照组，分别降低１４％、２６％、４０％、４２％和４０％。本文对棉酚的作用机理进行了讨论。

关键词： DNA 合成 ^3H-TdR掺入精母细胞棉酚

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