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冷空气对台风影响的流体动力学模拟实验研究

气象学报 1985年第1期 53-62页

作者：姚增权魏鼎文清华大学工程力学系中国科学院大气物理研究所

以相似理论为依据,用实验室模拟的方法,系统地研究了冷空气对台风的影响,得到了一些有意义的定量的结果。

关键词：台风不同强度层流场低压(气象) 冷空气最大风速流体动力学模拟实验研究

Assembly and Functions of Heteromeric Heat-Sensitive TRPV Channels

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Assembly and Functions of Heteromeric Heat-Sensitive TRPV Ch...

大气压空气均匀介质阻挡放电的演化及α系数测量

“基因、进化与生理功能多样性”海内外学术研讨会暨中国生理学会第七届比较生理学学术会议

作者： Wei Cheng~(1,3),Shuang Liu~2,Ping Liang~2,Jie Zheng~1,Ke-Wei Wang~2,Chang-Sen Sun~3 1 department of Physiology and Membrane Biology,university of California,Davis CA 95616 2 department of Neurobiology,Neuroscience Research Institute,peking university,beijing 100083 3 School of physics and Optoelectronic Technology,Dalian university of Technology,Dalian 116024

TRPV1-4.channels are cellular sensors for temperature changes and many pungent chemical *** co-express in dorsal root ganglion sensory neurons and many other cell types where precise response to signaling input is *** previous studies revealed that TRPV1-4.subunits co-assemble into heteromeric channels with distinct conductance and gating properties,suggesting that heteromeric channel formation may help to expand and fine tune the sensitivity and functionality of sensory *** the present study we investigated the functional properties of heteromeric channels and the role of intracellular N- and C-terminal regions in mediating subunit *** found that the voltage-dependent properties and pharmacological properties of TRPV channels depend on their subunit *** and heteromeric TRPV channels thus serve as distinct sensors with overlapping sensitivity to *** N-terminal ankyrin repeat domain (ARD) does not self-associate or associate with the intracellular C-terminal region. In contrast,robust interactions were observed between the C-terminal regions of like subunits as well as different TRPV subunits, suggesting that the C-terminal region of TRPV1 -4.may contribute to subunit assembly.

关键词： TRPV1-4.channels Dorsal root ganglion Heteromeric channels

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高电压技术 2018年第3期44卷 876-880页

作者：冉俊霞马东罗海云王新新河北大学物理科学与技术学院保定071002 河北省光电信息材料重点实验室保定071002 河北大学电子信息工程学院保定071002 清华大学电机工程与应用电子技术系电力系统及发电设备控制和仿真国家重点实验室北京100084

为实现较大间隙下的大气压空气介质阻挡均匀放电,通过ICCD高速相机研究了大气压空气均匀放电随时间的演化过程,并利用光学方法测量了大气压空气的电子碰撞电离系数（α系数）。ICCD高速时间分辨图像表明,大气压空气中的均匀放电是由汤... 详细信息

为实现较大间隙下的大气压空气介质阻挡均匀放电,通过ICCD高速相机研究了大气压空气均匀放电随时间的演化过程,并利用光学方法测量了大气压空气的电子碰撞电离系数（α系数）。ICCD高速时间分辨图像表明,大气压空气中的均匀放电是由汤森放电起始,随着放电的发展逐渐增强,当电流达到峰值时刻,放电也最强,但仍然为汤森放电。利用汤森放电阶段拍摄的纳秒级曝光时间的序列发光图像,对α系数进行了测量,测量了E/p0为29~32 V/（m·Pa）范围的大气压空气中的α系数。测量结果表明,α/p0与E/p0在一定范围内有函数关系,不同研究者在相同约化电场下测量得到的α/p0数值是接近的,至于细微的差别,一是来源于各自测量方法的不同,二是由于空气的附着系数在低E/p0值下十分分散,这也导致α系数的有效值也比较分散。该结果补充了低E/p0下α系数实验数据的空白。

关键词：介质阻挡放电电子碰撞电离系数汤森放电空气放电模式

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Photometric measurements of spring aerosol optical properties in dust and non-dust periods in China

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Photometric measurements of spring aerosol optical propertie...

REE Geochemistry of VMS and SEDEX Ores in China

“2010年北京气象学会中青年优秀论文评选”学术研讨会

作者： Wupeng Du~a,Jinyuan Xin~a,Mingxing Wang~a,Qingxian Gao~b,Zhanqing Li~c,Yuesi Wang~(a,*) a Institute of atmospheric physics,Chinese Academy of Sciences,beijing 100029,PR China b Chinese Research Academy of Environment Science,beijing 100012,PR China c{4. of Meteorology,The university of Maryland,College Park,MD 20782,USA

Aerosol observational data spanning three years(2005-2007) from the Chinese Sun Hazemeter Network(CSHN) were analyzed to characterize the optical properties of spring aerosol particles in dust and non-dust weather *** measurements were segregated and the dates of dust period were chosen by ground-based observations and the National Sand-dust Weather *** data obtained under suitable weather conditions and averaged over 15 sites in the *** data indicated that the mean spring aerosol optical depth(AOD) increased by 33%in dust weather than in non-dust weather over the three years under ***,the angstrom exponent(α) decreased by 24.in dust weather compared to in non-dust *** dust-source sites, AOD increased by 31%andαdecrease by 20%.The atmosphere of dust-source sites is relatively clean,and is generally only contaminated with small quantities of dust particles. atmospheric aerosols of this region were primarily in the form of coarse *** from being influenced by dust storms,the atmosphere of both near-source and distant sites displayed a large proportion of man-made aerosols,resulting in a large increase in the AOD andα*** to the contribution of sand-dust,the AOD of near-source and distant sites increased by 53%and 23%,respectively,while the value ofαwas reduced by 22%and 25%,*** to the content differences of man-made aerosols,and the fact that some observational data cannot be obtained under heavy dust storm weather conditions, the mean AOD andαwere highest at distant sites(0.69 and 0.91),intermediate at nearsource sites(0.51 and 0.86),and lowest at the dust-source sites(0.36 and 0.4.).In addition, if we take into account the impact of strong dust storms in which AOD can’t be observed by sunphotometer,the AOD probably become greater the farther form the dust-source region in non-dust periods,and while it is opposite in dust *** were also obtained for both urban and ecology background s

关键词： Optical properties Dust weather Non-dust weather Aerosol optical depth(AOD) Angstrom exponent(α)

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Acta Geologica Sinica(English Edition) 1997年第3期71卷 263-272页

作者： Song Xuexin Xu Qingsheng Guo Yuemin Mao Xueying and Ouyang Hong Institute of Mineral Deposits, Chinese Academy of Geological Sciences, beijing Institute of High Energy physics, Chinese Academy of Sinices, beijing Institute of Mineral Deposits Chinese Academy of Geological Sciences Beijing Institute of High Energy physics Chinese Academy of Sinices Beijing [?]Song Xuexin Born in 1939 and graduated from the department of Geology and Geography Peking University in 1963 and from the Graduate School Chinese Academy of Geological Sciences in 1966. He has been doing research work mainly on economic geology ore genesis and geochemistry in the Institute of Mineral Deposits Chinese Academy of Geological Sciences and now is Research Professor at the Institute of Mineral Deposits Chinese Academy of Geological Sciences. He was a Research Fellow of Alexander von Humboldt-Foundation FRG from 1983 to 1985 and in 1991 1993 and 1995.

REE ratios and patterns for massive pyrite ore and massive cuprous pyrite ore ofthe Baiyinchang orefield are quite similar to those for quartz keratophyritic tuff and quartzalbitophyre of the same orefield. However, massive cuprous pyrite ore of the Ashele Cu-Zn de-posit is similar to basalt-diabase of the same district in REE geochemistry. Comparison of theChinese VMS ores with those from Rio Tinto, Spain and Que River, Australia, in REEgeochemistry has been made. REE ratios and patterns of bedded-massive and massive ores ofthe Changba-Lijiagou Zn-Pb deposit, the second largest SEDEX deposit in China are similarto those of their host rocks, the Qinling shales of Devonian age and the Changba *** three types of ore and their host rocks of the Dongshengmiao pyrite (pyrrhotite)-Zn-Pbdeposit have parallel REE ratios and patterns.

关键词： VMS ore SEDEX ore REE geochemistry REE pattern REE parameter

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光引发N-乙烯基吡咯烷酮在嵌段聚醚聚氨酯膜上接枝聚合的研究

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高分子学报 1988年第3期 219-222页

作者：哈鸿飞刘先勇吴季兰杨福良冯新德北京大学技术物理系北京大学化学系

本文研究了在碱性介质中,氮气氛下 N-乙烯基吡咯烷酮(N-VP)在嵌段聚醚聚氨酯(SPEU)膜上的接枝聚合。测定了接枝率与接枝液中 N-VP单体浓度、光照时间、催化剂浓度等条件的关系。测定了接枝后 SPEU 膜的吸水性,并用扫描电镜对膜表面进行... 详细信息

本文研究了在碱性介质中,氮气氛下 N-乙烯基吡咯烷酮(N-VP)在嵌段聚醚聚氨酯(SPEU)膜上的接枝聚合。测定了接枝率与接枝液中 N-VP单体浓度、光照时间、催化剂浓度等条件的关系。测定了接枝后 SPEU 膜的吸水性,并用扫描电镜对膜表面进行了观察。对碱性介质中的接枝机理进行了初步探讨。

关键词：嵌段聚醚氨酯、N-乙烯基吡咯烷酮光接枝反应接枝共聚

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半导体激光器输出光功率的最佳值

中国激光 1988年第5期 264-267页

作者：王德煌徐万劲北京大学物理系北京有色金属与稀土应用研究所

本文分析了半导体激光器输出光功率与镜面反射率的关系,数值计算结果表明镀制介质腔控制正反镜面反射率可以得到最佳输出光功率.此外,分析表明减少腔内损耗,减薄有源层厚度和缩小条宽对输出功率都有显著的增加.

关键词：半导体激光器最佳值反射率半导体光激射器反射比率光功率镜面反射

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低杂波驱动电流的密度限制

核聚变与等离子体物理 1985年第1期 57-59页

作者：夏蒙棼胡慧玲北京大学物理系北京大学物理系北京

驱动等离子体电流是当前聚变研究中的一项重要课题,其目标是借以建立稳态运行的托卡马克反应堆。利用低杂波来驱动电流是主要方案之一,近来取得了重大进展。但是,在目前的实验中,低杂波只在较低的等离子体密度下才能有效地驱动电流,其... 详细信息

驱动等离子体电流是当前聚变研究中的一项重要课题,其目标是借以建立稳态运行的托卡马克反应堆。利用低杂波来驱动电流是主要方案之一,近来取得了重大进展。但是,在目前的实验中,低杂波只在较低的等离子体密度下才能有效地驱动电流,其密度极限远低于反应堆所要求的密度。对于这种现象,目前尚无适当的解释。如果不能突破这种密度限制,建立波驱动的稳态托卡马克反应堆的方案将成为泡影。

关键词：驱动电流密度限制低杂波线性模转换

Nano-size Distribution of Aerosol from Agricultural Residues Burning Matched to Optical Properties:A Laboratory Study

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Nano-size Distribution of Aerosol from Agricultural Residues...