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地球系统科学——挑战和机会

力学进展 1989年第3期19卷 289-303页

作者：贾复陶祖莱中国科学院力学研究所北京100080

本文简介了近年来国际上兴起的地球系统科学。地球系统科学是应人类面临的基本生存环境危机——全球变化的严重挑战而兴起。它把地球看作由相互作用着的各组元(如大气圈、土壤-岩石圈、生物圈、水圈等)组成的统一系统,研究这些组元及相... 详细信息

本文简介了近年来国际上兴起的地球系统科学。地球系统科学是应人类面临的基本生存环境危机——全球变化的严重挑战而兴起。它把地球看作由相互作用着的各组元(如大气圈、土壤-岩石圈、生物圈、水圈等)组成的统一系统,研究这些组元及相互作用是如何进行和如何演化的,以及系统对于外部作用变化及人类活动是如何响应的,从而提高人类对于自身赖以生存的地球环境在未来,特别是未来数十年至100年时间尺度上变化趋势的预言能力。地球系统科学将是20世纪末、21世纪人类最宏大的科学事业之一,广大力学工作者应该而且能够在其中作出自己应有的贡献。

关键词：地球系统系统气候生物圈

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脉冲红外热成像无损检测系统分辨力研究

激光与红外 2005年第6期35卷 410-412页

作者：薛书文祖小涛电子科技大学应用物理系

本文从理论上给出评价脉冲红外热成像无损检测分辨能力的依据,并以尼龙试件为例探讨了检测系统分辨力与缺陷深度、大小及检测时间之间的关系,从理论上给出检测系统对尼龙试件中缺陷深度和大小的检测极限分别为2. 5mm和2. 7mm,以及最佳... 详细信息

本文从理论上给出评价脉冲红外热成像无损检测分辨能力的依据,并以尼龙试件为例探讨了检测系统分辨力与缺陷深度、大小及检测时间之间的关系,从理论上给出检测系统对尼龙试件中缺陷深度和大小的检测极限分别为2. 5mm和2. 7mm,以及最佳的检测时间为热脉冲作用后的35s左右。同时,将理论结果与实验结果作了对比验证。

关键词：红外热成像缺陷无损检测

The Structure Evolution of Fused Silica Induced by CO2 Laser Irradiation

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Chinese Physics Letters 2012年第4期29卷 108-111页

作者： LIU Chun-Ming JIANG Yong LUO Cheng-Si SHI Xiao-Yan REN Wei XIANG Xia WANG Hai-Jun HE Shao-Bo YUAN Xiao-Dong LV Hai-Bing ZHENG Wan-Guo zu Xiao-tao Research Center of Laser Fusion China Academy of Engineering PhysicsMianyang 621900 Department of Applied Physics University of Electronic Science and Technology of ChinaChengdu 610054

The structure evolution of fused silica induced by CO2 laser irradiation (with a wavelength of 10.6 μm) is studied in *** the non-evaporation mitigation process,the irradiation time should be long enough to completely eliminate ***,there is a raised rim around the mitigated *** rim height is enhanced when the irradiation time increases,and the mitigated site can lead to off-axis and on-axis downstream light *** shrinkage occurs during the irradiation and rapid cooling processes,and this may be due to a decrease in the Si O Si bond *** distribution of debris overlaps with the maximum phase retardance induced by *** debris arouses an enhanced light absorption in the region from 220nm to 800nm.

关键词： debris eliminate overlap

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钴掺杂二氧化锡纳米粉的光致发光和磁学性质

物理学报 2009年第2期58卷 936-940页

作者：刘春明方丽梅祖小涛电子科技大学应用物理系成都610054

研究了钴掺杂对二氧化锡纳米粉的光致发光性质和磁学性质的影响,发现钴掺杂对发光带的位置影响很小,但紫外发光带与蓝色发光带的强度之比随掺杂含量的增加而下降.当钴掺杂含量达到0.02时,样品中的铁磁性被完全破坏.讨论了样品中的磁相... 详细信息

研究了钴掺杂对二氧化锡纳米粉的光致发光性质和磁学性质的影响,发现钴掺杂对发光带的位置影响很小,但紫外发光带与蓝色发光带的强度之比随掺杂含量的增加而下降.当钴掺杂含量达到0.02时,样品中的铁磁性被完全破坏.讨论了样品中的磁相互作用的机理,认为掺杂离子的不均匀分布、自旋极化子与掺杂离子之间的耦合都可能导致反铁磁性的相互作用,这种反铁磁性的作用破坏了铁磁性.

关键词：钴掺杂二氧化锡光致发光磁学性质

Reduced expression of α-tocopherol-associated protein is associated with tumor cell proliferation and the-increased risk of prostate cancer recurrence

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Asian Journal of Andrology 2007年第2期9卷 206-212页

作者： Xing-Qiao Wen Xiao-Juan Li zu-Lan Su Yong Liu Xiang-Fu Zhou Yu-Bin Cai Wen-tao Huang Xin Gao Department of Urology Third Affiliated Hospital Sun Yat-Sen University Guangzhou 510630 China Department of Health Care Third Affiliated Hospital Sun Yat-Sen University Guangzhou 510630 China Department of Pathology Third Affiliated Hospital Sun Yat-Sen University Guangzhou 510630 China

Aim： To examine the impact and prognostic significance of α-tocopherol associated protein （TAP） expression in a series of prostate cancer patients. Methods： Tissues from 87 patients underwent radical prostatectomy were examined for TAP expression by immunohistochemistry. The relationships of the staining results, the clinic pathological characteristics and the recurrence times were analyzed. Results： Compared with the adjacent areas of normal and benign glands, immunoreactivity of TAP was reduced in areas of prostate cancer. A lower TAP-positive cell number per mm^2 of the largest cancer area （defined as TAP-PN） was associated with higher clinical stage （r = -0.248, P = 0.0322）. Inverse associations were found among the TAP-PN and positive lymph nodes （r = -0.231, P = 0.0325）, preoperative prostatespecific antigen （PSA） levels （r = -0.423, P = 0.0043）, tumor size （r = -0.315, P = 0.0210） and elevated tumor cell proliferation, which was indicated by the staining of Ki-67 （r = -0.308, P = 0.0026）. TAP-PN was a significant predictor of recurrence univariately （P = 0.0006）, as well as multivariately, adjusted for known markers including preoperative PSA, clinical stage, Gleason score, surgical margin, extra-prostatic extension, seminal vesicle invasion and lymph node metastasis （P = 0.0012）. Conclusion： Reduced expression of TAP was associated with the cell proliferation status of prostate cancer, adverse pathological parameters and the increased risk of recurrence.

关键词： α-tocopherol associated protein prostate neoplasms recurrence vitamin E

Temperature Evolution of Energy Gap and Band Structure in the Superconducting and Pseudogap States of Bi_(2)Sr_(2)CaCu_(2)O_(8+δ)Superconductor Revealed by Laser-Based Angle-Resolved Photoemission Spectroscopy

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Chinese Physics Letters 2018年第1期35卷 90-94页

作者： Xuan Sun Wen-tao Zhang Lin Zhao Guo-Dong Liu Gen-Da Gu Qin-Jun Peng Zhi-Min Wang Shen-Jin Zhang Feng Yang Chuang-Tian Chen zu-Yan Xu Xing-Jiang Zhou National Laboratory for Superconductivity Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Bering 100049 Condensed Matter Physics and Materials Science Department Brookhaven National LaboratoryUptonNew York 11973USA Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijing 100190 Collaborative Innovation Center of Quantum Matter Beijing 100871

We carry out detailed momentum-dependent and temperature-dependent measurements on Bi_(2)Sr_(2)CaCu_(2)O_(8+δ)(Bi2212)superconductor in the superconducting and pseudogap states by super-high resolution laser-based angleresolved photoemission *** precise determination of the superconducting gap for the nearly optimally doped Bi2212(T_(c)=91 K)at low temperature indicates that the momentum-dependence of the superconducting gap deviates from the standard d-wave form(cos(2Φ)).It can be alternatively fitted by including a high-order term(cos(6Φ))in which the next nearest-neighbor interaction is *** find that the band structure near the antinodal region smoothly evolves across the pseudogap temperature without a signature of band reorganization which is distinct from that found in Bi_(2)Sr_(2)CuO_(6+δ)*** indicates that the band reorganization across the pseudogap temperature is not a universal behavior in cuprate *** results provide new insights in understanding the nature of the superconducting gap and pseudogap in high-temperature cuprate superconductors.

关键词： Copper compounds

Effects of Eichhornia crassipes Growth on Aquatic Plants in Dianchi Lake

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Meteorological and Environmental Research 2011年第2期2卷 74-75,79页

作者： WU Fu-qin LIU Tian-meng WANG zu-tao WANG Yue-hua HE Shu-zhuang Plant Science Institute School of Life SciencesYunnan UniversityKunming 650091China Institute of Environmental Sciences and Ecological Restoration School of Life SciencesYunnan UniversityKunming 650091China

[Objective] The aim was to study the effects of Eichhornia crassipes as an invasive plant on aquatic plants in Dianchi Lake. [Method] Based on the determination of chlorophyll content of phytoplankton and submerged plant (Potamogeton pectinatus) in Dianchi Lake in different months, the effects of E. crassipes on aquatic plants in Dianchi Lake were studied, and the allelopathy effect of root culture solution of E. crassipes on Microcystis aquaticum was discussed. [Result] The growth of E. crassipes in Dianchi Lake reduced the chlorophyll content of phytoplankton and submerged plant (P. pectinatus), and it showed that E. crassipes had certain inhibitory effect on their growth; the culture solution of E. crassipes root inhibited M. aeruginosa growth obviously. [Conclusion] The study could provide scientific references for the prevention and control of ecological safety of E. crassipes.

关键词： Eichhornia crassipes Aquatic plant Allelopathy effect Chlorophyll content China

Spin-down and emission variations for PSR J0742-2822

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Research in Astronomy and Astrophysics 2021年第2期21卷 142-148页

作者： Shi-Jun Dang Na Wang Hui-Hui Wang Jian-Ping Yuan Lun-Hua Shang Rai Yuen Ming-Yu Ge Xia Zhou Shuang-Qiang Wang Fei-Fei Kou Wen-Ming Yan Jing-Bo Wang Zhi-Gang Wen Jun-tao Bai Zhi-Yong Liu zu-Rong Zhou Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences 19A Yuquan RoadBeijing 100049China Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210008China School of Physics Huazhong University of Science and TechnologyWuhan 430074China School of Electronic and Optical Engineering Nanjing University of Science and TechnologyNanjing 210094China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China CAS Key Laboratory of FAST National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Physics and Electronic Science Guizhou Normal UniversityGuiyang 550001China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal UniversityGuiyang 550001China

PSR J0742-2822 is known for its quasi-periodic changes in the observed pulse profile and spindown *** this paper,we analyzed 13 years of timing data obtained with the Nanshan 25-m radio telescope and the Parkes 64-m radio *** found that the average values of the spin-down rate((v))of this pulsar changed in four different *** investigated the correlation between v and W50,and ascertained that the correlation changed in different ***,not all the changes in states and correlation can be associated with glitch *** examined the long term evolution ofγ-ray flux(0.1-300 GeV)and the pulse profiles corresponding to the four different states using Fermi-LAT Pass8(P8 R3)data from 2008 August 5 to 2019 October *** did not detect a significant change inγ-ray flux or the pulse *** results suggest that the connection between pulsar rotation and emission is more complex than previously reported for this pulsar.

关键词： pulsars general-stars pulsar-methods timing

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安腾架构硬件辅助完全虚拟化设计与实现

系统仿真学报 2008年第18期20卷 4910-4917,4922页

作者：董耀祖张献涛田坤徐雪飞英特尔亚太研发有限公司开源软件技术中心

随着虚拟化技术的发展,对系统虚拟机的研究日益成为当今计算机系统领域的新热点.在研究了VT–i(Intel?VTforIA–64)技术的基础上,结合XenVMM架构设计和实现了IA–64平台的硬件辅助完全虚拟化支持,使未经修改的操作系统可以安全高效的运... 详细信息

随着虚拟化技术的发展,对系统虚拟机的研究日益成为当今计算机系统领域的新热点.在研究了VT–i(Intel?VTforIA–64)技术的基础上,结合XenVMM架构设计和实现了IA–64平台的硬件辅助完全虚拟化支持,使未经修改的操作系统可以安全高效的运行在硬件辅助虚拟机中。本文将详细论述Xen/VT–i架构的关键技术实现,重点讨论了CPU虚拟化,内存虚拟化,IO设备虚拟化以及时间虚拟化等的实现方法,最后就VT–i虚拟化客户机和本征系统的性能进行了对比,同时结合性能数据和当前实现,我们对硬件辅助完全虚拟化技术的前景作一些展望。

关键词：完全虚拟化 Xen VT–i 虚拟化虚拟机监视器安腾