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| 1 | Application of nanoindentation to investigate chemomechanical properties change of cement paste in the carbonation reaction显示文摘Nanoindentation technique was adopted to investigate the chemomechanical properties change of hardened cement paste before and after carbonation.It was found that the mean elastic modulus and mean hardness obviously increase after the carbonation reaction.Specifically,the probability of the elastic modulus showed a sharp reduction for the elastic modulus at the range of 7-34 and 83-160 GPa,in comparison of a large increase for the elastic modulus between 34-83 GPa.For the same reason,the probability of the hardness showed a large decrease when the hardness fell within 0.15-1.75 and 4.15-8.20 GPa and a dramatic increase for the hardness at the range of 1.75-4.15 GPa.In addition,low density C-S-H was affected by the carbonation degradation more seriously than high density C-S-H.The carbonation reaction led to distinct decrease of the number and size of unhydrated cement paste particles. | HAN JianDe PAN GangHua SUN Wei WANG CaiHui CUI Dong | 2012 | Science China(Technological Sciences)2012，55，3： | 10 |
| 2 | Chloride ion transport performance in slag mortar under fatigue loading显示文摘The transport performance of chloride ion in slag cement mortar was investigated experimentally. In the self-designed experiment, fatigue loading was coupled simultaneously with ion transportation process, the diffusion law of chloride ion was obtained by titration and the AE (acoustic emission) technique was employed to detect the real-time damage distribution in the mortar specimen. The results for fatigue stress levels of 0.3, 0.4 and 0.5 and slag contents of 0, 10%, 30% and 50% showed that fatigue loading accelerated the diffusion of chloride ion in mortar and the acceleration effect increased with the increase in stress levels. Slag addition was found to improve anti-chloride ion erosion performance effectively with the best substitution level at 30%, because the inhibition effect of slag on chloride ion diffusion diminished when the slag content exceeded 30%. The comparative experiments indicated that dynamic load has a significant effect on the transport performance of chloride ion in slag cement mortar. | WANG CaiHui SUN Wei JIANG JinYang HAN JianDe YE BangTu | 2012 | Science China(Technological Sciences)2012，55，5： | 8 |
| 3 | A blind video watermarking scheme based on ICA and shot segmentation显示文摘Video watermark is the main method to protect the copyright of digital video. In this paper, a blind video watermarking scheme based on independent component analysis (ICA) and shot segmentation is presented. In this scheme, the global histogram comparison approach is used to segment the video, and ICA is performed on each ob- tained segment to get its independent component frames (ICFs). The copyright informa- tion is embedded into the principal independent component frames (PICFs) according to the single watermark embedding (SWE) scheme. The content-based shot segmentation for video sequences is used here to improve the robustness to temporal desynchroniza- tion. The watermark embedded in PICFs provides better robustness to intra-video collu- sion attack. And blind detection is achieved by using the SWE scheme. The simulations show the feasibility and validity of this scheme. It can resist most of the common frame-based and video-based attacks. The watermark can be detected blindly. And it is robust to temporal desynchronization and intra-video collusion. | SUN Jiande LIU Ju | 2006 | Science in China(Series F)2006，49，3： | 4 |
| 4 | The Effect of Thermal Exfoliation Temperature on the Structure and Supercapacitive Performance of Graphene Nanosheets显示文摘Graphene nanosheets(GSs) were prepared from graphite oxide by thermal exfoliation method. The effect of thermal exfoliation temperature on the structure and supercapacitive performance of GSs has been investigated. The results show that the GSs with pore sizes center around 4.0 nm. With an increase of thermal reduction temperature, the number of stacking layers and the structure disorder degree increase, while the oxygen-containing groups content, BET surface area,and electrical resistivity of GSs decrease. The results indicate that 673 K is the preferable thermal exfoliation temperature to acquire good supercapacitive performance. In this case, the GSs have the best supercapacitive performance(233.1 F g-1) in a 6 mol L-1KOH electrolyte. The prepared GSs at the preferable thermal exfoliation temperature have good rate performance and cycle stability. | Haiyang Xian Tongjiang Peng Hongjuan Sun Jiande Wang | 2015 | Nano-Micro Letters2015，7，1： | 3 |
| 5 | Formation mechanism of condensates, waxy and heavy oils in the southern margin of Junggar Basin, NW China显示文摘It is a challenge to determine the source and genetic relationship of condensate, waxy and heavy oils in one given complicated petroliferous area, where developed multiple sets of source rocks with different maturity and various chemical features.The central part of southern margin of Junggar Basin, NW China is such an example where there are condensates, light oils, normal density oils, heavy crude oils and natural gases. The formation mechanism of condensates has been seriously debated for long time;however, no study has integrated it with genetic types of waxy and heavy oils. Taking the central part of southern margin of Junggar Basin as a case, this study employs geological and geochemical methods to determine the formation mechanism of condensates,waxy and heavy oils in a complicated petroliferous area, and reveals the causes and geochemical processes of the co-occurrence of different types of crude oils in this region. Based on detailed geochemical analyses of more than 40 normal crude oils, light oils,condensates and heavy oils, it is found that the condensates are dominated by low carbon number n-alkanes and enriched in light naphthenics and aromatic hydrocarbons. Heptane values of these condensates range from 19% to 21%, isoheptane values from1.9 to 2.1, and toluene/n-heptane ratios from 1.5 to 2.0. The distribution of n-alkanes in the condensates presents a mirror image with high density waxy crude oils and heavy oils. Combined with the oil and gas-source correlations of the crude oils, condensates and natural gas, it is found that the condensates are product of evaporative fractionation and/or phase-controlled fractionation of reservoir crude oils which were derived from mature Cretaceous lacustrine source rocks in the relatively early stage. The waxy oils are the intermediate products of evaporative fractionation and/or phase-controlled fractionation of reservoir crude oils, while the heavy oils are in-situ residuals. Therefore, evaporative fractionation and/or phase-controlled fractionation would account for the formation of the condensate, light oil, waxy oil and heavy oil in the central part of southern margin of Junggar Basin, resulting in a great change of the content in terms of light alkanes, naphthenics and aromatics in condensates, followed by great uncertainties of toluene/n-heptane ratios due to migration and re-accumulation. The results suggest that the origin of the condensate cannot be simply concluded by its ratios of toluene/n-heptane and n-heptane/methylcyclohexane on the Thompson's cross-plot, it should be comprehensively determined by the aspects of geological background, thermal history of source rocks and petroleum generation,physical and chemical features of various crude oils and natural gas, vertical and lateral distribution of various crude oils in the study area. | CHEN JianPing DENG ChunPing WANG XuLong NI YunYan SUN YongGe ZHAO Zhe LIAO JianDe WANG PeiRong ZHANG DiJia LIANG DiGang | 2017 | Science China Earth Sciences2017，60，5： | 3 |
| 6 | Robust video hashing based on representative-dispersive frames显示文摘This study proposes a robust video hashing for video copy detection.The proposed method,which is based on representative-dispersive frames(R-D frames),can reveal the global and local information of a video.In this method,a video is represented as a graph with frames as vertices.A similarity measure is proposed to calculate the weights between edges.To select R-D frames,the adjacency matrix of the generated graph is constructed,and the adjacency number of each vertex is calculated,and then some vertices that represent the R-D frames of the video are selected.To reveal the temporal and spatial information of the video,all R-D frames are scanned to constitute an image called video tomography image,the fourth-order cumulant of which is calculated to generate a hash sequence that can inherently describe the corresponding video.Experimental results show that the proposed video hashing is resistant to geometric attacks on frames and channel impairments on transmission. | NIE XiuShan LIU Ju SUN JianDe WANG LianQi YANG XiaoHui | 2013 | Science China(Information Sciences)2013，56，6： | 3 |
| 7 | Blind Video Watermarking Scheme Based on Combination of ICA and Shot Segmentation 显示文摘 | Liu Ju Sun Jiande | 2005 | Science in China- Series E2005，35，12： | 1 |
| 8 | Robust video Hashing based on double-layer embedding显示文摘 | NIE Xiushan LIU Ju SUN Jiande | 2011 | IEEE Signal Processing Letters2011，18，5： | 1 |
| 9 | Key-frame based robust video Hashing using isometric feature mapping显示文摘 | NIE Xiushan LIU Ju SUN Jiande | 2011 | Journal of Computational Information Systems2011，7，6： | 1 |
| 10 | Application of X-ray computed tomography in characterization microstructure changes of cement pastes in carbonation process显示文摘 | Jiande Han Wei Sun Ganghua Pan Caihui Wang Hui Rong | 2012 | Journal of Wuhan University of Technology-Mater Sci Ed2012，，2： | 1 |
| 11 | Spherical torus-based video hashing for near-duplicate video detection显示文摘Dear editor,With the rapid development of multimedia technologies,users can easily generate and share multiple videos through the Internet.Similarly,numerous illegal and useless near-duplicate videos generated through simple reformatting,transformation,and editing appear on the web.These nearduplicate videos inconvenience users when they are surfing the Internet and are considered a copyright infringement.Robust video hashing,which is also called video fingerprinting,does not require access to the video contents at the time of creation and can be used to detect existing contents.In general, | Xiushan NIE Yane CHAI Ju LIU Jiande SUN Yilong YIN | 2016 | Science China(Information Sciences)2016，59，5： | 1 |
| 12 | Blind Video Watermarking Scheme Based on Combination of |CA and Shot Segmentation显示文摘 | Liu Ju Sun Jiande | 2005 | Science in China Series E2005，35，12： | 1 |
| 13 | A motion location based video wa- termarking scheme using ICA to extract dynamic frames 显示文摘 | Sun Zhaowan Liu Ju Sun Jiande | 2009 | Neural Computing and Applications2009，18，5： | 1 |
| 14 | A motion location based videowatermarking scheme using ICA to extract dynamic flames显示文摘 | Sun Zhaowan Liu Ju Sun Jiande | 2009 | Neural Comput and Applic2009，，18： | 1 |
| 15 | Simulations of Single Event Upset (SEU) in SRAMs Induced by Heavy Ions with Geant4显示文摘 | Liu Jiande Sun Youmei Liu Jie Hou Mingdong Duan Jinglai Zhang Zhangang Yao Huijun Mo Dan | 2011 | IMP & HIRFL Annual Report2011，，1： | 0 |
| 16 | 3 - 33 Edge Effectson SEU Sensitivity of SO1 SRAM显示文摘 | Gu Song Liu Jie Hou Mingdong Sun Youmei Zhang Zhangang Liu T ianqi Duan Jinglai Yao Huijun Geng Chao Luo Jie Xi Kai Liu Jiande | 2012 | IMP & HIRFL Annual Report2012，，1： | 0 |
| 17 | 3 - 35 Large Dispersion of Deposited Energy in Devices with Different Active Film Thicknesses显示文摘 | Xi Kai Liu Jie Zhang Zhangang Geng Chao Liu Jiande Gu Song Liu Tianqi HouMingdong Sun Youmei | 2012 | IMP & HIRFL Annual Report2012，，1： | 0 |
| 18 | 4-24 Main Work Outline of the Irradiation Technique Group in 2016显示文摘The main work of the irradiation technique group focuses on the following two aspects in 2016:1.Technique support We have had about 772.5 h beam time for 39 rounds of single event effect(SEE)tests,which is cooperating with various institutes,universities,and companies.The tests are the basic safeguard for the spacecraft and satellite.In order to guarantee the test efficiency of the Terminal 5,the maintenance and improvement for the vacuum,the sample transfer and beam monitor system have been achieved. | Sun Youmei Yao Huijun Luo Jie Liu Jiande Cheng Yaxiong Wu Yang | 2016 | IMP & HIRFL Annual Report2016，，1： | 0 |
| 19 | 4-29 Damage Effects of CVD Single-layer MoS2 Irradiated by Heavy Ions显示文摘This work is mainly to study the effect of heavy ion irradiation on the damage of single layer MoS2.The number of layers of MoS2 prepared by CVD(chemical vapor deposition)method was determined by optical microscopy and Raman spectroscopy.The monolayer MoS2 prepared by CVD under high energy 209Bi ion irradiation was analyzed by Raman analysis and AFM observation.And the results are compared and analyzed before and after the beam irradiation of single layer MoS2 prepared by mechanical stripping method. | Wu Yang Sun Youmei Liu Jie Zhai Pengfei Guo Hang Yao Huijun Liu Jiande Luo Jie | 2016 | IMP & HIRFL Annual Report2016，，1： | 0 |
| 20 | 3-19 Study of PRESTAGE Sensitivity to Variation of Input Parameters显示文摘PRESTAGE is a Monte Carlo simulation code which calculates proton single event effect cross sections from heavy ion test data. It can accurately predict not only single event upsets induced by proton indirect ionization,but also single event latch-ups and proton direct ionization effects[1]. However, in practical applications some of the input parameters are difficult to obtain. For instance, the thickness of the sensitive volume is closely related to the topology, doping concentration, and other device parameters. Device suppliers are generally reluctant to disclose such information due to the consideration of intellectual property protection. Therefore, examining the sensitivity to the input parameters is important to the usage of the PRESTAGE method. | Xi Kai Liu Jie Luo Jie Liu Jiande Liu Tianqi Wang Bin Ye Bing Yin Yanan Ji Qinggang Hou Mingdong Sun Youmei | 2015 | IMP & HIRFL Annual Report2015，，1： | 0 |
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