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Forcing mechanism of the Pleistocene east Asian monsoon variations in a phase perspective

Science China Earth Sciences 2005年第10期48卷 1708-1717页

作者： TIAN Jun1,2. WANG Pinxian1, CHENG Xinrong1, WANG Rujian1 & SUN Xiangjun1,3.1. State Key Laboratory of Marine Geology, Tongji University, Shanghai 2.0092. China 2. Institute of Geology and Geophysics, Chinese Academy of Sciences, beijing 10002., China 3. Institute of Botany, Chinese Academy of Sciences, beijing 100093. China State Key Laboratory of Marine Geology Tongji University Shanghai China Institute of Geology and Geophysics Chinese Academy of Sciences beijing China Institute of Botany Chinese Academy of Sciences beijing China

The deep sea records from the ODP Sites 1143.and 1144 in the northern and southern South China Sea (SCS), including foraminiferal δ 18O and δ 13., Opal% and pollen percentage, reveal that the variations of the east Asian monsoon have been closely correlated with the variations of the Earth’s orbital parameters (eccentricity, obliquity and precession) and the global ice volume on orbital scale. All the monsoonal proxies show strong 100 ka, 41 ka and 2.0}ka cycles. Although G. ruber δ 13. of Site 1143.is coherent with the ETP (ETP= normalized (eccentricity + obliquity-precession) at eccentricity, obliquity and precession bands, most of the coherent relationship focuses on the precession band, and the other monsoonal proxies are coherent with the ETP only at the precession band, which indicate that precession dominates the Pleistocene tropical climate changes. The phase relationship of the monsoonal proxies with the foraminiferal δ 18O implies that the global ice volume changes have played a significant role in modulating the east Asian monsoon climate, at least dominating the winter monsoon. This forcing mechanism of the east Asian monsoon is apparently different from that of the Indian ocean mon-soon. The variations of the east Asian monsoon at the precession band, at least that of the winter monsoon, have been controlled not only by the sensible heating but also by the latent heating of the surface water in the South China Sea.

关键词： South China Sea, ODP, east Asian monsoon, orbital forcing, global ice volume.

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Remote sensing based shrub above-ground biomass and carbon storage mapping in Mu Us desert,China

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Science China(Technological Sciences) 2010年第S1期53卷 176-183页

作者： XU Min 1,2.CAO ChunXiang 1,TONG QingXi 1,LI ZengYuan 3.ZHANG Hao 1,HE QiSheng 1,2.GAO MengXu 1,2.ZHAO Jian 1,2.ZHENG Sheng 1,2.CHEN Wei 1,2.& ZHENG LanFen 1 1State Key Laboratory of Remote Sensing Science,Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and beijing Normal University,beijing 100101,China 2.Graduate School of the Chinese Academy of Sciences,beijing 100049,China 3.{3. Institute of Forest Resources and Information Techniques,Chinese Academy of Forestry,beijing 10009,China 1. State Key Laboratory of Remote Sensing Science Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University Beijing 100101 China 2. Graduate School of the Chinese Academy of Sciences Beijing 100049 China 3. research Institute of Forest Resources and Information Techniques Chinese Academy of Forestry Beijing 10009 China

The estimation of above-ground biomass(AGB) and carbon storage is very important for arid and semi-arid ***-1A/B satellite data combined with field measurement data was used for the estimation of shrub AGB and carbon storage in the Mu Us desert,*** correlations of shrub AGB and spectral reflectance of four bands as well as their combined vegetation indexes were respectively analyzed and stepwise regression analysis was employed to establish AGB prediction *** prediction equation based on ratio vegetation index(RVI)was proved to be more suitable for shrub AGB estimation in the Mu Us desert than *** AGB and carbon storage were mapped using the RVI based prediction model in *** statistics showed the western Mu Us desert has relatively high AGB and carbon storage,and that the gross shrub carton storage in Mu Us desert reaches 16 799 2.0 t,which has greatly contributed to the carbon fixation in northern China.

关键词： above-ground biomass carbon storage Mu Us desert HJ-1A/B remote sensing

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Integral ear elimination and virtual point-based updating algorithms for constrained Delaunay TIN

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Science China(Technological Sciences) 2008年第S1期51卷 135-144页

作者： WU LiXin1,2.WANG YanBing2.3.& SHI WenZhong2.4 1 Institute for Geo-informatics & Digital Mine research,Northeastern University,Shenyang 110004,China 2.Institute for GIS/RS/GPS & Subsidence Engineering research,China University of Mining & technology,{3. 100085,China 3.Laboratory of 3. Information Acquisition & Application,Capital Normal University,{3. 10003.,China 4 Center for Advanced GIS research,LSGI,Polytechnic University Hong Kong,Hong Kong,China Northeastern Univ Inst Geoinformat & Digital Mine Res Shenyang 110004 Peoples R China China Univ Mining & Technol Inst GIS RS GPS & Subsidence Engn Res Beijing 100085 Peoples R China Capital Normal Univ Lab Informat Acquisit & Applicat Beijing 100037 Peoples R China Hong Kong Polytech Univ LSGI Ctr Adv GIS Res Hong Kong Hong Kong Peoples R China

Constrained Delaunay Triangular Irregular Networks (CD-TIN),a kind of special data structure,have many practical applications in Geoinformatics,especially in the representation of linear constrained triangulation for DTM and DSM,such as in digital city and digital mine. Past {2.es on D-TIN mainly focused on point in-sertion and deletion without consideration of constraint,and that on CD-TIN usu-ally paid more attention to the insertion algorithms for points and edges,but little to the deletion algorithms. The presented algorithms are far insufficient for the dy-namic updating of CD-TIN. In this paper,the constraint edge in CD-TIN is consid-ered to be any set of broken lines,i.e.,polygon edges,broken lines and simple segments. The constraint edge may be composed of one or more constraint seg-ments,and it is allowed to be in any form: Open or close,intersection or self-in-tersection. By improving to present insertion and deletion algorithms for D-TIN,two new algorithms for CD-TIN updating are presented. According to the polymorphism of the constraints in CD-TIN,virtual point is adopted to represent the crossing node between constraint edges when a constraint edge is inserted in CD-TIN. Two new algorithms named as Integral Ear Elimination (IEE) and Influence Domain Retrian-gulation for Virtual Point (IDRVP) are presented,the former is for constraint point deletion,while the later is for the insertion and deletion of constraint edge. The principle of IDRVP is that to divide the influence domain of a virtual point into some parts by the constraint-keeping edges,and to retriangulate each part of the influ-ence domain individually referring to the constraint visible property and constraint empty circle (CEC) criterion. Finally,a prototype system is developed with VC++,one case on the integration of 3. terrain and buildings is demonstrated to test the correctness of new algorithms. It shows that the new algorithms are effective for the updating of CD-TIN.

关键词： Delaunay TIN spatial constraint data updating spatial modeling polymorphism digital mine

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High Throughput SNP Genotyping with Two Mini-sequencing Assays

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Acta Biochimica et Biophysica Sinica 2004年第6期36卷 379-384页

作者： Chunqing LUO1,2., Libin DENG1#, and Changqing ZENG1,2. The Institute of Genetic and Developmental Biology, the Chinese Academy of Sciences, beijing 100101, China 2.0} Genomics Institute, the Chinese Academy of Sciences, beijing 1013.0, China The Institute of Genetic and Developmental Biology the Chinese Academy of SciencesBeijing 100101 China beijing Genomics Institute the Chinese Academy of SciencesBeijing 101300 China

Two mini-sequencing methods, FP-TDI (template-directed dye-terminator incorporation with fluorescence-polarization) and MassArray (matrix assisted laser desorption ionization time of flight detection mass spectrometry), were optimized. A numeric standard was introduced to evaluate the SNP scoring quality of FP-TDI assay, thus made the optimization work easier. At the same time, using multi-PCR technology, 8-plex genotyping of MassArray assay was successfully carried out, some softwares were developed and the data process of MassArray was highly automated. Then these two methods were applied to high throughput SNP genotyping, the accuracy, efficiency and robustness were compared. The result shows FP-TDI is more sensitive to the concentration of SNPprimer and PCR product, as well as extension cycles, the SNPprimer length of FP-TDI should be 2.–3. bp long, whereas MassArray assay prefers to be as short as only 16 *** 6440 SNP sites of human chromosome 3.were genotyped in a sample of 90 individuals, 4792.sites by FP-TDI assay and 1648 sites by MassArray assay, the success rates of FP-TDI and MassArray were 67.7% and 93.6% respectively. The throughput of MassArray was higher than FP-TDI, and the cost of MassArray was lower, MassArray was more suitable for high throughput SNP genotyping.

关键词： SNP genotyping FP-TDI MassArray high throughput

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Nonholonomic mapping theory of autoparallel motions in Riemann-Cartan space

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Science China(Physics,Mechanics & Astronomy) 2010年第9期53卷 1707-1715页

作者： GUO YongXin1,LIU Chang2.WANG Yong3.LIU ShiXing1 & CHANG Peng2.1 College of Physics,Liaoning University,Shenyang 11003.,China 2.School of Aerospace Engineering,{2. Institute of technology,{2. 110081,China 3.School of Basic Medical Science,Guangdong Medical College,Dongguan 52.0}08,China 1. College of Physics Liaoning University Shenyang 110036 China2. School of Aerospace Engineering Beijing Institute of Technology Beijing 110081 China3. School of Basic Medical Science Guangdong Medical College Dongguan 523808 China

The method of nonholonomic mapping is utilized to construct a Riemann-Cartan space embedded into a known Riemann-Cartan space,which includes two special cases that a Weitzenbck space and a Riemann-Cartan space are respectively embedded into a Euclidean space and a Riemann *** means of this mapping theory,the nonholonomic corresponding relation between the autoparallels of two Riemman-Cartan spaces is *** particular,an autoparallel in a Riemann-Cartan space can be mapped into a geodesic line in a Riemann space and an autoparallel in Weitzenbck space be mapped into a geodesic line in Euclidean *** on the Lagrange-d'Alembert principle,the equations of motion for dynamical systems in Riemman-Cartan space should be autoparallel equations of the *** applications,the problem of autoparallel motion of spinless particles,Chaplygin's nonholonomic systems and a rigid body rotating with a fixed point are investigated in space with torsion.

关键词： nonholonomic mapping Riemann-Cartan space connection torsion autoparallel

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Synthesize TiO_2.microspheres self-assembled from nanorods via hydrothermal treatment

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Science China Chemistry 2007年第2期50卷 175-178页

作者： ZHANG YiBing1,2.FENG XinJian3.& JIANG Lei2.3.1 Shangrao Teachers’ College,Shangrao 3.4001,China 2.National Center for Nanoscience and Nanotechnology,beijing 100080,China 3.Institute of Chemistry,Chinese Academy of Sciences,beijing 100080,China 1. Shangrao Teachers’ College Shangrao 334001 China 2. National Center for Nanoscience and Nanotechnology Beijing 100080 China 3. Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China

The TiO2.microspheres were deposited on the glass substrates under certain conditions via hydro-thermal reaction using 0.15 mol·L?1 TiCl3.saturated NaCl aqueous solution adding urea as an additive. The TiO2.is characterized rutile by results of SEM,TEM and XRD techniques,the TiO2.microspheres are large scale assembled from TiO2.nanorods. The affections on the products by the factors of the con-tents of urea being an additive(the key techniques) ,the reaction temperature,the reaction time and the concentration of TiCl3.were studied. The optimum condition was found,and the mechanism of reac-tions was discussed also.

关键词： TiO2 self-assembly nanorods microsphere hydrothermal reaction

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面向图像拼接检测的自适应残差算法

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中国图象图形学报 2024年第2期29卷 419-429页

作者：张玲穆文鹏陈北京南京信息工程大学数字取证教育部工程研究中心南京210044 南京信息工程大学江苏省大气环境与装备技术协同创新中心南京210044 南京信息工程大学计算机学院南京210044

目的恶意的图像拼接篡改给名誉、法律、政治等带来一系列的挑战,而现有的图像拼接检测算法通常采用参数固定的高通滤波器提取滤波特征进行预处理,没有考虑图像之间的差异。方法本文设计自适应残差模块(adaptive residuals module, ARM... 详细信息

目的恶意的图像拼接篡改给名誉、法律、政治等带来一系列的挑战,而现有的图像拼接检测算法通常采用参数固定的高通滤波器提取滤波特征进行预处理,没有考虑图像之间的差异。方法本文设计自适应残差模块(adaptive residuals module, ARM)凸显拼接篡改痕迹,将卷积运算后的残差多次拼接,且每次拼接后再利用注意力机制实现通道间的非线性交互。然后,使用通道注意力SE(squeeze and excitation)模块以减少由ARM提取残差特征产生的通道之间信息冗余,并以在图像分类领域获得卓越性能的EfficientNet(high-efficiency network)为骨干网络,提出一种新的图像拼接检测算法。结果实验结果表明,所提算法在CASIA I(CASIA image tampering detection evaluation database),CASIA II,COLUMBIA COLOR,NIST16(NIST special database 16)和FaceForensic++这5个公开数据集上分别取得98.95%,98.88%,100%,100%,88.2.%的检测准确率,获得比现有算法更高的准确率。提出的ARM将骨干网络EfficientNet在CASIA II数据集的准确率提高了3.94%以上。结论提出的基于自适应残差的图像拼接检测算法充分考虑图像之间的差异,凸显篡改区域与未篡改区域之间的区别,并获得更好的拼接检测结果。

关键词：图像取证深度神经网络图像拼接检测自适应残差 EfficientNet

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Effect of Auxiliary Gases on Combustion Synthesis of Si_3._4

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Journal of Materials Science & technology 2005年第5期21卷 701-704页

作者： Weiping SHEN+, Fei WANG, Zhuohii WU and Changchun GELab of special Ceramics and P/M, University of Science and technology {2., {2. 100083. China Lab. of special Ceramics and P/M University of Science and Technology Beijing Beijing 100083 China

This paper presents results of combustion synthesis （Self-Propagating High Temperature Synthesis, SHS） of Si3.4 under nitrogen with argon, hydrogen or ammonia. Higher percentages of α-Si3.4 content were obtained in large size cakes in SHS with hydrogen and ammonia than those with argon. Effect of the auxiliary gases for combustion synthesis of Si3.4 on a phase content, on phase transformation of α-Si3.4 to β-Si3.4 in SHS Si3.4 and on oxygen content in SHS Si3.4 were investigated.

关键词： Combustion synthesis m-silicon nitride Phase transformation Auxiliary gases

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Quantitative analysis on soil erosion based on 3. technology

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中国有色金属学会会刊：英文版 2005年第S1期15卷 82-85页

作者： JING Hai-tao~1, XIE Hong-quan~(2. 3., FU Mei-chen~2. FENG Zhong-ke~4 (1. Xuzhou Normal University, Xuzhou 2.1009, China 2. China University of Mining and technology({2. Campus), {2. 100083. China 3. Hebei Polytechnic University, Tangshan 063.09, China 4. {2. Forestry University, {2. 100083. China Xuzhou Normal Univ Xuzhou 221009 Peoples R China China Univ Min & Technol Beijing 100083 Peoples R China Hebei Polytech Univ Tangshan 063009 Peoples R China beijing Forestry Univ Beijing 100083 Peoples R China

The quantitative analysis on soil erosion is very significant for macro-decision of soil loss, for quick control of natural disasters and for system of periodical report. Based on the research of 3.(GPS, GIS and RS), the {2. information can be obtained by GPS or RS. Digital elevation model can be formed by GIS software, and at the same time, we can get some vector graph, such as landuse, vegetation type and soil type. Then the soil erosion of research area was calculated by USLE. The methods and techniques were discussed, including how to carve up polygons, how to capture the values of factors and how to differentiate the erosion intensity.

关键词： soil erosion USLE GPS GIS RS

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Ultrasonic Frequency Fast-Convert Pulse Plasma Spraying Power Supply Topology

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稀有金属材料与工程 2011年第S4期40卷 297-301页

作者： Zhang Wei1,Qi Bojin1,Xu Haiying2.School of Mechanical Engineering and Automation,BeiHang University,beijing 100191,China2.0} Aeronautical Manufacturing {2. {3. Institute,beijing 10002.,China BeiHang Univ Sch Mech Engn & Automat Beijing 1000191 Peoples R China beijing Aeronaut Mfg Technol Res Inst Beijing 100024 Peoples R China

Considering the high DC current and high pulse frequency characteristic of ultrasonic frequency fast-convert pulse plasma spraying process,a special power supply topology was proposed,which was composed of the mutual independent base current circuit and peak current *** current circuit was consisted of four parallel direct current power supplies,which was not only to meet the requirements of high power output,but also improved the reliability of power *** on the Boost circuit topology,a peak current circuit was designed,which could reduce effectively the output inductance influence and output ultrasonic frequency pulse high current with fast-convert rising and falling *** on the above techniques,the Ultrasonic frequency fast-convert pulse plasma spraying power supply was *** can output 5-1000A base current,0-2.0A peak current,and the pulse current frequency band is 2.-100kHz,10%～80% duty ratio and pulse current change rate over 50A/μs.

关键词： Ultrasonic frequency pulse Fast-convert Plasma spraying

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