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| 1 | The Yanshanian Granites and Associated Mo-Polymetallic Mineralization in the Xiangcheng-Luoji Area of the Sanjiang-Yangtze Conjunction Zone in Southwest China显示文摘The Xiangcheng-Luoji area is located in the conjunction of the southern part of the 'Sanjiang' mineralization belt and the west margin of Yangtze craton. The geological studies were carried out to know the Indosinian large porphyry Cu polymetallic deposits. Recent studies revealed that the area existed in the superposition of Late Yanshanian acidic intrusive rock belt and developed Mo-Cu polymetallic mineralization where promising exploration results have been achieved. Through the systematic study of geochronology, formation age of the Renlin Mo-minieralization monzogranite is 81.7±1.1 Ma. Re-Os dating results concentrate on 82.34±1.2–88.27±1.23 Ma for the model ages of molbdenite of Tongchanggou Mo deposits, average age is 85 ± 2 Ma where seven data points constitute a good isochron which shows that they were the same period products of mineralization. Geochemical features shown that the rocks have a high content of SiO 2(66.59–77.36wt%), alkaline-rich(K2O=2.68–6.08wt%; Na2O=0.50–4.91wt%; K2O/Na2 O ratios are 0.71–5.56, where average ratio of 1.89) and have aluminum–rich features(Al2O3 10.38–15.15wt%) with σ values less than 3.3. Which indicate that they belong to the high-K calc-alkali to shoshonite series. Geochemistry of Yanshanian intrusions shows that rocks are enrich in LREE with obvious negative δEu anomalies, enrichment of trace elements like, LILE elements(Rb, Th, Ba) with a relative loss of Ba, and loss of high field strength elements(Nb, Ta, P, Ti) and HREE elements. The granite genetic classification diagram shows that the granites belong to A-type granite and formatted in syn-collision tectonic environment. Meanwhile, the Yanshanian granites also inherited the characteristics of island arc environment which formed in the process of crustal melting caused by upwelling of asthenospheric substances in the extensional tectonic background. The process of partial melting existed substances from the deep(lower crust or upper mantle) which have been added. In the Xiangcheng-Luoji area, monzogranite and granodiorite porphyry bodies are widely developed Mo polymetallic mineralization, the deep porphyry mineralization have great potential for geological prospecting. | LI Wenchang YIN Guanghou YU Haijun LIU Xuelong | 2014 | Acta Geologica Sinica(English Edition)2014，88，6： | 20 |
| 2 | An exact solution of unsteady Couette flow of generalized second grade fluid显示文摘The fractional calculus approach is introduced into the rheological constitutive model of a generalized second grade fluid. A constitutive model with fractional derivative is developed for the generalized second grade fluid. Unsteady Couette flow of the generalized second grade fluid is studied by using the method of the discrete inverse Laplace transform and generalized Mittag-Leffler function. And then an exact solution is obtained for this problem with arbitrary fractional derivative. This provides a new analytical tool for the study of viscoelastic fluid mechanics. | TAN Wenchang XIAN Feng WEI Lan | 2002 | Chinese Science Bulletin2002，47，21： | 17 |
| 3 | Zircon U-Pb Ages of the Granodioritic Porphyry in the Laba Molybdenum Deposit,Yunnan,SW China and Its Geological Implication显示文摘Geza 岛弧是一个著名矿化作用集中区域,在西藏的高原的东方边缘的 Sanjiang 领域的部分。在最近的年里,几迟了的 Yanshanian 花岗石的侵入和联系存款在这个区域被发现了,在桃花源,区域是其一最大 Laba 铝存款。以前的研究建议预定 Laba 矿化作用是 85 ±2 妈。然而, granodioritic 斑岩的年龄仍然保持未知。在这研究,从忍受辉钼矿的 granodioritic 斑岩的三件样品锆石标明日期的 LA-ICP-MS U-Pb 与 85.00 ± 的产生日期一起被进行了0.23 妈(MSWD = 0.58 ) , 85.28 ±0.28 妈(MSWD = 1.12 ) ,并且 84.83 ±0.26 妈(MSWD = 0.79 ) 分别地,显示这些 granodioritic 斑岩在 ∼85 附近在迟了的 Yanshanian 形成了妈。与矿化作用的地质的特征结合了,时间地, Laba 存款遗传上空间地与 granodioritic 斑岩被联系。另外, Laba 存款的年龄与另外的迟了的 Yanshanian 侵入和矿化作用一致,建议矿化作用可能在在迟了的白垩纪期间的 intra 板 extensional 环境下面被产生。 | YU Haijun LI Wenchang YIN Guanghou LU Yingxiang CAO Xiaomin HUANG Dingzhu DONG Tao ZHANG Youming | 2014 | Acta Geologica Sinica(English Edition)2014，88，4： | 14 |
| 4 | Asynchronous Brain-Computer Interface Shared Control of Robotic Grasping显示文摘The control of a high Degree of Freedom(DoF) robot to grasp a target in three-dimensional space using Brain-Computer Interface(BCI) remains a very difficult problem to solve. Design of synchronous BCI requires the user perform the brain activity task all the time according to the predefined paradigm; such a process is boring and fatiguing. Furthermore, the strategy of switching between robotic auto-control and BCI control is not very reliable because the accuracy of Motor Imagery(MI) pattern recognition rarely reaches 100%. In this paper, an asynchronous BCI shared control method is proposed for the high DoF robotic grasping task. The proposed method combines BCI control and automatic robotic control to simultaneously consider the robotic vision feedback and revise the unreasonable control commands. The user can easily mentally control the system and is only required to intervene and send brain commands to the automatic control system at the appropriate time according to the experience of the user. Two experiments are designed to validate our method: one aims to illustrate the accuracy of MI pattern recognition of our asynchronous BCI system; the other is the online practical experiment that controls the robot to grasp a target while avoiding an obstacle using the asynchronous BCI shared control method that can improve the safety and robustness of our system. | Wenchang Zhang Fuchun Sun Hang Wu Chuanqi Tan Yuzhen Ma | 2019 | Tsinghua Science and Technology2019，24，3： | 8 |
| 5 | Mercury levels and estimated total daily intakes for children and adults from an electronic waste recycling area in Taizhou, China: Key role of rice and fish consumption显示文摘In order to assess the potential health risks of Hg pollution, total mercury(T–Hg) and methyl mercury(Me Hg) concentrations were determined in air, dust, surface soil, crops, poultry,fish and human hair samples from an electronic waste(e-waste) recycling area in Taizhou,China. High concentrations of T–Hg and Me Hg were found in these multiple matrices, and the mean concentration was 30.7 ng/m3 of T–Hg for atmosphere samples, 3.1 μg/g of T–Hg for soil, 37.6 μg/g of T–Hg for dust, 20.3 ng/g of Me Hg for rice and 178.1 ng/g of Me Hg for fish,suggesting that the e-waste recycling facility was a significant source of Hg. The inorganic Hg(I–Hg) levels(0.84 μg/g) in hair samples of e-waste workers were much higher than that in the reference samples. Pearson's correlation coefficients showed that strong positive correlations(p < 0.01) between hair I–Hg and time staying in industrial area(r = 0.81) and between Me Hg and fish consumption frequency(r = 0.91), imply that workers were mainly exposed to Hg vapor through long-time inhalation of contaminated air and dust, while other population mainly exposed to Me Hg through high-frequency fish consumption. The estimated daily intakes of Hg showed that dietary intake was the major Hg exposure source,and Hg intakes from rice and fish were significantly higher than from any other foods. The estimated total daily intakes(TDIs) of Me Hg for both children(696.8 ng/(kg·day)) and adults(381.3 ng/(kg·day)) greatly exceeded the dietary reference dose(Rf D) of 230 ng/(kg·day),implying greater health risk for humans from Hg exposures around e-waste recycling facilities. | Wei Tang Jinping Cheng Wenchang Zhao Wenhua Wang | 2015 | Journal of Environmental Sciences2015，27，8： | 8 |
| 6 | Improving Image Copy-Move Forgery Detection with Particle Swarm Optimization Techniques显示文摘Copy-Move Forgery(CMF) is one of the simple and effective operations to create forged digital images.Recently,techniques based on Scale Invariant Features Transform(SIFT) are widely used to detect CMF.Various approaches under the SIFT-based framework are the most acceptable ways to CMF detection due to their robust performance.However,for some CMF images,these approaches cannot produce satisfactory detection results.For instance,the number of the matched keypoints may be too less to prove an image to be a CMF image or to generate an accurate result.Sometimes these approaches may even produce error results.According to our observations,one of the reasons is that detection results produced by the SIFT-based framework depend highly on parameters whose values are often determined with experiences.These values are only applicable to a few images,which limits their application.To solve the problem,a novel approach named as CMF Detection with Particle Swarm Optimization(CMFDPSO) is proposed in this paper.CMFD-PSO integrates the Particle Swarm Optimization(PSO) algorithm into the SIFT-based framework.It utilizes the PSO algorithm to generate customized parameter values for images,which are used for CMF detection under the SIFT-based framework.Experimental results show that CMFD-PSO has good performance. | SHI Wenchang ZHAO Fei QIN Bo LIANG Bin | 2016 | China Communications2016，13，1： | 6 |
| 7 | Methane emissions from natural and drained peatlands in the Zoigê, eastern Qinghai-Tibet Plateau显示文摘Peatlands are one of the major natural sources of methane(CH_4), but the level of CH_4 efflux is uncertain,especially in alpine peatlands. In this study, CH_4 emission fluxes from natural and drained peatlands on the QinghaiTibet Plateau, southwest China, were measured from June to October in 2013 using the opaque static chamber technique and the Fast Greenhouse Gas Analyzer(DLT-100,Los Gatos Research Corp.). CH_4 emission fluxes ranged from 2.07 to 56.33 mg m^(-2)h^(-1)in natural peatlands and from 0.02 to 0.42 mg m^(-2)h^(-1)in drained peatlands. Mean CH_4 emission flux was 19.13 mg m^(-2)h^(-1)in natural peatlands and 0.14 mg m^(-2)h^(-1)in drained peatlands.These results showed that drainage led to a significant decrease in CH_4 emissions. CH_4 emission fluxes for all sampling plots were significantly correlated with variation in water table depth for linear(R^2= 0.453, P \ 0.01) and exponential functions(R^2= 0.429, P \ 0.01). | Wenchang Zhou Lijuan Cui Yifei Wang Wei Li | 2017 | Journal of Forestry Research2017，28，3： | 6 |
| 8 | A review of EEG-based brain-computer interface systems design显示文摘A brain-computer interface(BCI) system can recognize the mental activities pattern by computer algorithms to control the external devices. Electroencephalogram(EEG) is one of the most common used approach for BCI due to the convenience and non-invasive implement. Therefore, more and more BCIs have been designed for the disabled people that suffer from stroke or spinal cord injury to help them for rehabilitation and life. We introduce the common BCI paradigms, the signal processing, and feature extraction methods. Then, we survey the different combined modes of hybrids BCIs and review the design of the synchronous/asynchronous BCIs.Finally, the shared control methods are discussed. | Wenchang Zhang Chuanqi Tan Fuchun Sun Hang Wu Bo Zhang | 2018 | Translational Neuroscience and Clinics2018，4，2： | 5 |
| 9 | Minimum geometric power distortionless response beamforming against heavy-tailed noise of unknown statistics显示文摘A minimum geometric power distortionless response beamforming approach against impulsive noise(including all αstable noise) of unknown statistics is proposed.Due to that definite logarithmic moments require no priori knowledge of impulsive noise,this new beamformer substitutes the logarithmic moments for the second-order moments and iteratively minimizes the 'geometric power' of the beamformer's output snapshots,subjected to a linear constraint.Therefore,the proposed beamformer can provide significantly higher output geometric signal-to-noise-andinterference ratio.Moreover,the optimum weight vector is obtained by using a new iteration process.The simulation results prove that the new method is effective. | Wenchang Wang Lei Li Chunjing Liu Feng Liu | 2011 | Journal of Systems Engineering and Electronics2011，22，5： | 3 |
| 10 | CCAR1 5' UTR as a natural miRancer of miR-1254 overrides tamoxifen resistance显示文摘 | Gaopeng Li Xiaoli Wu Wenchang Qian Huayong Cai Xinbao Sun Weijie Zhang Sheng Tan Zhengsheng Wu Pengxu Qian Keshuo Ding Xuefei Lu Xiao Zhang Hong Yan Haifeng Song Shouhong Guang Qingfa Wu Peter E Lobie Ge Shan Tao Zhu | 2016 | Cell Research2016，26，6： | 3 |
| 11 | G-frames and g-Riesz bases显示文摘 | Wenchang Sun | 2005 | Journal of Mathematical Analysis and Applications2005，，1： | 3 |
| 12 | Detecting Compromised Kernel Hooks with Support of Hardware Debugging Features显示文摘Although there exist a few good schemes to protect the kernel hooks of operating systems, attackers are still able to circumvent existing defense mechanisms with spurious context information. To address this challenge, this paper proposes a framework, called HookIMA, to detect compromised kernel hooks by using hardware debugging features. The key contribution of the work is that context information is captured from hardware instead of from relatively vulnerable kernel data. Using commodity hardware, a proof-of-concept prototype system of HookIMA has been developed. This prototype handles 3 082 dynamic control-flow transfers with related hooks in the kernel space. Experiments show that HookIMA is capable of detecting compromised kernel hooks caused by kernel rootkits. Performance evaluations with UnixBench indicate that runtime overhead introduced by HookIMA is about 21.5%. | Shi Wenchang Zhou HongWei Yuan JinHui Liang Bin | 2012 | China Communications2012，9，10： | 3 |
| 13 | Implementing Operating System Support for Extended Trusted Path in TPM-Capable Environments显示文摘Trusted path is one of the crucial features that operating systems must provide for fundamental security support. In order to explore the possibility of implementing a trusted path mechanism with the support of trusted platform module (TPM) technologies, and to support TPM capabilities in operating systems, the paper extended the scope of the conventional trusted path to cover the situation in which a user communicates with software residing on a remote host. The paper combined the concept of operating system support for trusted path with that for TPM platforms, and proposed the architecture of an extended trusted path mechanism in operating system with considerations on TPM-capable platforms support. As part of the author’s research in secure operating systems, the work of the paper was carried out with Linux as an experimental prototype system. The research result shows that TPM capabilities can strengthen extended trusted path mechanisms of operating systems. | SHI Wenchang | 2006 | Wuhan University Journal of Natural Sciences2006，11，6： | 3 |
| 14 | Formation and evolution of the tertiary carbonate reefs in the Madura Strait Basin of Indonesia显示文摘Analysis of 2 D seismic data over 4 500 km in length from the Madura Strait Basin in the East Java Sea reveals seismic re?ection characteristics of reefs and associated sedimentary bodies, including asymmetrical or symmetrical dome re?ections, slope progradational re?ections, chaotic re?ections and discontinuous strong re?ections inside the reef, which onlap the ?ank of the reef. It is concluded that the developmental paleo-environment of most reefs is mainly conducive to shallow marine carbonate platform facies and platform margin facies, based on well core data, variations in seismic facies and strata thickness.The formation and evolution of all reefs are primarily in?uenced by the tectonic framework of the Madura Strait Basin. Platform margin reefs are principally controlled by two types of structures: one is a series of E-W trending Paleogene normal faults, and the other is an E-W trending Neogene inversion structures. In addition, wave actions, tidal currents and other ocean currents play an accelerated role in sorting, rounding and redeposition for the accumulation and evolution of reefs. Tertiary reefs in the MSB can be divided into four types: 1) an open platform coral reef of Late Oligocene to Early Miocene, 2) a platform margin coral reef controlled by normal faults in Late Oligocene to Early Miocene, 3) a platform margin Globigerina moundreef controlled by a 'hidden' inversion structure in Early Pliocene, and 4) a platform margin Globigerina mound-reef controlled by thrust faults in the early Pliocene. Patterns of the formation and evolution of reefs are also suggested. | RAN Weimin LUAN Xiwu LU Yintao LIU Hong YANG Jiajia ZHAO Yang HE Wenchang YAN Zhonghui | 2019 | Journal of Oceanology and Limnology2019，37，1： | 3 |
| 15 | The Late Cretaceous Crustal Magmatism of the Geza Arc Metallogenic Belt in Yunnan Province,and Zircon Ages and Hf Isotopic Evidence of the Porphyry Cu-Mo Mineralization显示文摘Objective The Geza arc in Yunnan Province,located in the southern Yidun arc,is an important part of the Sanjiang tectonic-magmatic belts in southwestern China and is a newly discovered copper polymetallic ore-concentrating district.Recent studies show that the newly discovered Yanshanian porphyry Cu-Mo polymetallic mineralization superimposed in the Indosinian porphyry copper belt | YANG Fucheng LI Wenchang LIU Xuelong WANG Shuaishuai | 2017 | Acta Geologica Sinica(English Edition)2017，91，1： | 2 |
| 16 | DCFl-Checker: Checking Kernel Dynamic Control Flow Integrity with Performance Monitoring Counter显示文摘It is a challenge to verify integrity of dynamic control flows due to their dynamic and volatile nature.To meet the challenge,existing solutions usually implant an 'attachment' in each control transfer.However,the attachment introduces additional cost except performance penalty.For example,the attachment must be unique or restrictedly modified.In this paper,we propose a novel approach to detect integrity of dynamic control flows by counting executed branch instructions without involving any attachment.Our solution is based on the following observation.If a control flow is compromised,the number of executed branch instructions will be abnormally increased.The cause is that intruders usually hijack control flows for malicious execution which absolutely introduces additional branch instructions.Inspired by the above observation,in this paper,we devise a novel system named DCFIChecker,which detect integrity corruption of dynamic control flows with the support of Performance Monitoring Counter(PMC).We have developed a proof-of-concept prototype system of DCFI-Checker on Linux fedora 5.Our experiments with existing kernel rootkits and buffer overflow attack show that DCFIChecker is effective to detect compromised dynamic control transfer,and performance evaluations indicate that performance penalty induced by DCFI-Checker is acceptable. | SHI Wenchang ZHOU Hongwei YUAN Jinhui LIANG Bin | 2014 | China Communications2014，11，9： | 2 |
| 17 | A novel stochastic reaction-diffusion model of Ca^2+ blink in cardiac myocytes显示文摘In cardiac myocytes,the sarcoplasmic reticulum(SR)is the main storage organelle of free Ca^(2+).The concentration of free Ca^(2+)in the SR is 0.5–1.0 mmol/L and is 2–3 orders of magnitude greater than that in the cytosol.The SR is composed of interconnected cisternae(junctional SR,i.e.,JSR)and tubules(free SR network,i.e.,FSR)that extend throughout the cytosol[1].Ca^(2+)is released from the JSR into the cytosol via Ca^(2+)release units(CRUs, | Jinghui Li Wenjun Xie Xi Chen Yunlong Huo Heping Cheng Wenchang Tan | 2017 | Science Bulletin2017，62，1： | 2 |
| 18 | Image Forgery Detection Using Segmentation and Swarm Intelligent Algorithm显示文摘Small or smooth cloned regions are difficult to be detected in image copy-move forgery(CMF)detection. Aiming at this problem,an effective method based on image segmentation and swarm intelligent(SI)algorithm is proposed. This method segments image into small nonoverlapping blocks. A calculation of smooth degree is given for each block. Test image is segmented into independent layers according to the smooth degree. SI algorithm is applied in finding the optimal detection parameters for each layer. These parameters are used to detect each layer by scale invariant features transform(SIFT)-based scheme,which can locate a mass of keypoints. The experimental results prove the good performance of the proposed method,which is effective to identify the CMF image with small or smooth cloned region. | ZHAO Fei SHI Wenchang QIN Bo LIANG Bin | 2017 | Wuhan University Journal of Natural Sciences2017，22，2： | 2 |
| 19 | Morphological,Molecular and Pathogenicity of Alternaria gaisen Associated with Leaf Brown-Spot on‘Gonggan’Mandarin in China显示文摘[Objective]This paper was to identify the pathogen of leaf brown-spot on‘gonggan’mandarin(Citrus reticulate var.gonggan)in Zhaoqing,Guangdong Province.[Method]The pathogen was determined based on sequence analysis of ITS,endoPG,tef1,gapdh,Alt a1,rpb2 and opa10-2 genes;the morphological characteristics were recorded on PDA and PCA;and its pathogenicity on excised and intact host leaves of citrus‘gonggan’was tested.[Result]A detailed description of Alternaria gaisen was obtained based on morphological,molecular and pathogenic characterization,which was the causal agent of brown-spot disease on leaves of‘gonggan’mandarin orchard trees in Zhaoqing,Guangdong,China.[Conclusion]This study provides a scientific basis for the effective control of leaf brown-spot on‘gonggan’mandarin. | Cui Mengjiao Sein Lai Lai Aung Wei Xin Yu Zhihe Mo Yanwei Yu Wenchang Deng Jianxin Li Qili | 2020 | Plant Diseases and Pests2020，11，5： | 2 |
| 20 | A framework for the fusion of visual and tactile modalities for improving robot perception显示文摘Robots should ideally perceive objects using human-like multi-modal sensing such as vision, tactile feedback, smell, and hearing. However, the features presentations are different for each modal sensor. Moreover,the extracted feature methods for each modal are not the same. Some modal features such as vision, which presents a spatial property, are static while features such as tactile feedback, which presents temporal pattern,are dynamic. It is difficult to fuse these data at the feature level for robot perception. In this study, we propose a framework for the fusion of visual and tactile modal features, which includes the extraction of features, feature vector normalization and generation based on bag-of-system(BoS), and coding by robust multi-modal joint sparse representation(RM-JSR) and classification, thereby enabling robot perception to solve the problem of diverse modal data fusion at the feature level. Finally, comparative experiments are carried out to demonstrate the performance of this framework. | Wenchang ZHANG Fuchun SUN Hang WU Haolin YANG | 2017 | Science China(Information Sciences)2017，60，1： | 2 |
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