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| 1 | Clustering by Fast Search and Find of Density Peaks with Data Field显示文摘A clustering algorithm named 'Clustering by fast search and find of density peaks' is for finding the centers of clusters quickly. Its accuracy excessively depended on the threshold, and no efficient way was given to select its suitable value, i.e., the value was suggested be estimated on the basis of empirical experience. A new way is proposed to automatically extract the optimal value of threshold by using the potential entropy of data field from the original dataset. For any dataset to be clustered, the threshold can be calculated from the dataset objectively instead of empirical estimation. The results of comparative experiments have shown the algorithm with the threshold from data field can get better clustering results than with the threshold from empirical experience. | WANG Shuliang WANG Dakui LI Caoyuan LI Yan DING Gangyi | 2016 | Chinese Journal of Electronics2016，25，3： | 60 |
| 2 | Effect of Organic Matter Type and Maturity on Organic Matter Pore Formation of Transitional Facies Shales: A Case Study on Upper Permian Longtan and Dalong Shales in Middle Yangtze Region, China显示文摘Organic matter(OM)nanopores developed in transitional facies shales,i.e.,the Upper Permian Longtan and Dalong Formations in the Yangtze Platform,China,were investigated to determine the corre-sponding influence of thermal maturity and OM types within the geological conditions.A suite of 16 core samples were taken from Type-Ⅲ Longtan shales and Type-Ⅱ Dalong shales from two wells covering a ma-turity(Ro,vitrinite reflectance)ranging from 1.22%to 1.43%and 2.62%to 2.97%,respectively.Integrated analysis of the shale samples was carried out,including field-emission scanning electron microscopy(FESEM),low-pressure N2 and CO2 adsorption,high-pressure CH4 adsorption,and mercury intrusion capillary pressure(MICP)analysis.The fluid inclusions of liquid and gas hydrocarbons trapped in calcite vein samples in Dalong shales of two wells were studied using laser Raman and fluorescence spectroscopy.FE-SEM images indicated that OM pores in different formations varied substantially in terms of shape,size,and distribution density.OM pores in Type-Ⅱ Dalong shales of Well XY1 were mainly micropore,sparsely distributed in the gas-prone kerogen with a spot-like and irregular shape,while bitumen rarely developed observable pores.In contrast,the morphology of OM pores in Type-Ⅲ Longtan shales were significantly different,which was due to differences in the OM type.The primary OM pores in some terrestrial woody debris in Longtan shales had a relatively larger pore diameter,ranging from hundreds of nanometers to a few micrometers and were al-most all rounded in shape,which might be one of the factors contributing to larger pore volume and gas adsorption capacity than Dalong shales of Well XY1.Comparing Dalong shales of Well XY1 with relatively lower thermal maturity,there were abundant spongy-like pores,densely developed in the pyrobitumen in Type-Ⅱ Dalong shales of Well EY1,with an irregular shape and diameter ranging from several to hundreds of nanometers.Many blue fluorescent oil inclusions and a small number of CH4 inclusions mixed with C2H6 could be observed within calcite veins in Dalong shales of Well XY1,whereas only CH4 inclusions could be identified within calcite veins in Dalong shales of Well EJ1.Therefore,thermal maturity not only controlled the type of hydrocarbons generated,but also makes a significant contribution to the formation of OM pores,resulting in larger pore volumes and adsorption capacity of Type-Ⅱ shale samples in the dry gas window. | Zhongrui Wu Sheng He Yuanjia Han Gangyi Zhai Xipeng He Zhi Zhou | 2020 | Journal of Earth Science2020，31，2： | 12 |
| 3 | Augmented reality registration algorithm based on nature feature recognition显示文摘This paper presents an improved key frame based augmented reality registration algorithm for real-time motion tracking in outdoor environment. In such applications, wide-baseline feature matching is a critical problem. In this paper, we apply randomized tree method to match key points extracted from the input image to those key frames as a classification problem. Extended Kalman filter is also utilized for jitter correction. A video see-through mobile augmented reality system is built for the on-site digital reconstruction of Yuanmingyuan Garden. Experimental results demonstrate that this algorithm is real-time, robust and effective for outdoor tracking. | CHEN Jing WANG YongTian GUO JunWei LIU Wei LIN JingDun XUE Kang LIU Yue DING GangYi | 2010 | Science China(Information Sciences)2010，53，8： | 11 |
| 4 | Effect of Huangshukuihua(Flos Abelmoschi Manihot) on diabetic nephropathy:a Meta-analysis显示文摘OBJECTIVE: To assess the efficacy of Huangshukuihua(Flos Abelmoschi Manihot) on diabetic nephropathy(DN).METHODS: Articles were retrieved from Pub Med,EMBASE, the Cochrane Central Register of Controlled Trials, Web of Science, Chinese Biomedical Literature Database, and China National Knowledge Infrastructure Database, Chinese Evidence-Based Medicine Database, and Wanfang Database. Two reviewers independently reviewed the article. Only randomized controlled trials were included and 27 were identified involving 2239 patients(1143 in the treatment group and 1096 in the control group).RESULTS: Huangshukuihua(Flos Abelmoschi Manihot) had a significant effect on renal function by improving blood urea nitrogen and serum creatinine,reducing urine protein(24-h urine protein, and urinary albumin excretion rate), and improving serum albumin level, compared with the control group.CONCLUSION: Our findings suggest that, although the bioactive ingredients and mechanism underlying renal protection are unknown, the role of Huangshukuihua(Flos Abelmoschi Manihot) in the treatment of DN deserves further investigation. | Sun Qin Yang Gangyi Zhang Min Zhang Min Chen Shu Chen Pin | 2015 | Journal of Traditional Chinese Medicine2015，35，1： | 9 |
| 5 | Some pinching theorems for minimal submanifolds in S^m(1)×R显示文摘Let Mn be an n-dimensional compact minimal submanifolds in Sm(1)×R.We prove two pinching theorems by the Ricci curvature and the sectional curvature pinching conditions respectively.In fact,we characterize the Clifford tori and Veronese submanifolds by our pinching conditions respectively. | CHEN Hang CHEN GangYi LI HaiZhong | 2013 | Science China Mathematics2013，56，8： | 7 |
| 6 | System Stability and Instability: A Extended Discussion on Significance and Function of Stirring Energy Conservation Law显示文摘A discussion on significance and function of stirring energy conservation is made further. It is considered that the stirring energy conservation law is an important principle and method for analyses of stability and evolution of systems. It can be applied as both explanations of system stability and method of evolutionary analyses of a system. At the same time, some fundamental problems in the Newtonian system are pointed out. | Chen Gangyi OuYang Bolin Peng Taoyong | 2005 | 工程科学(英文版)2005，3，3： | 7 |
| 7 | 2-D IMAGE-BASED VOLUMETRIC MODELING FOR PARTICLE OF RANDOM SHAPE显示文摘In this paper, an approach to predicting randomly-shaped particle volume based on its two-Dimensional (2-D) digital image is explored. Conversion of gray-scale image of the particles to its binary coun-terpart is first performed using backlighting technique. The silhouette of particle is thus obtained, and conse-quently, informative features such as particle area, centroid and shape-related descriptors are collected. Several dimensionless parameters are defined, and used as regressor variables in a multiple linear regression model to predict particle volume. Regressor coefficients are found by fitting to a randomly selected sample of 501 parti-cles ranging in size from 4.75mm to 25mm. The model testing experiment is conducted against a different ag-gregate sample of the similar statistical properties, the errors of the model-predicted volume of the batch is within ±2%. | Chen Ken Larry E. Banta Jiang Gangyi | 2006 | Journal of Electronics(China)2006，23，6： | 6 |
| 8 | SADDLE-POINT BASED SEPARATION OF TOUCHED OBJECTS IN 2-D IMAGE显示文摘In many image analysis and processing problems, discriminating the size and shape of each individual object in an aggregate pile projected in an image is an important practice. It is relatively easy to distinguish these features among the objects already separated from each other. The problems will be undoubtedly more complex and of greater challenge if the objects are touched or/and overlapped. This letter presents an algorithm that can be used to separate the touches and overlaps existing in the objects within a 2-D image. The approach is first to convert the gray-scale image to its corresponding binary one and then to the 3-D topographic one using the erosion operations. A template (or mask) is engineered to search the topographic surface for the saddle point, from which the segmenting orientation is determined followed by the desired separating operation. The algorithm is tested on a real image and the running result is adequately satisfying and encouraging. | Chen Ken Larry E. Banta Jiang Gangyi | 2006 | Journal of Electronics(China)2006，23，3： | 5 |
| 9 | The Changeless Technique Researches for City Flood Control and Reduced the Disaster显示文摘The make use of the stir kinetic energy conservation law, the theories and chaogeless technique build up for city flood control. Pass the system energy conversion or deliver with contain of second circulation, carry out city flood control and reduced the disaster that develops the artificial lake. It is advantageous to the improvement city ecosystem environment and resources of water that is missing. | Chen Gangyi OuYang Bolin Xia Fan | 2006 | 工程科学(英文版)2006，4，1： | 4 |
| 10 | Development and validation of an HPLC–MS/MS method to determine clopidogrel in human plasma显示文摘A quantitative method for clopidogrel using online-SPE tandem LC–MS/MS was developed and fully validated according to the well-established FDA guidelines.The method achieves adequate sensitivity for pharmacokinetic studies,with lower limit of quantifications(LLOQs)as low as 10 pg/m L.Chromatographic separations were performed on reversed phase columns Kromasil Eternity-2.5-C18-UHPLC for both methods.Positive electrospray ionization in multiple reaction monitoring(MRM)mode was employed for signal detection and a deuterated analogue(clopidogrel-d_4)was used as internal standard(IS).Adjustments in sample preparation,including introduction of an online-SPE system proved to be the most effective method to solve the analyte back-conversion in clinical samples.Pooled clinical samples(two levels)were prepared and successfully used as real-sample quality control(QC)in the validation of back-conversion testing under different conditions.The result showed that the real samples were stable in room temperature for 24 h.Linearity,precision,extraction recovery,matrix effect on spiked QC samples and stability tests on both spiked QCs and real sample QCs stored in different conditions met the acceptance criteria.This online-SPE method was successfully applied to a bioequivalence study of75 mg single dose clopidogrel tablets in 48 healthy male subjects. | Gangyi Liu Chunxia Dong Weiwei Shen Xiaopei Lu Mengqi Zhang Yuzhou Gui Qinyi Zhou Chen Yu | 2016 | Acta Pharmaceutica Sinica B2016，6，1： | 3 |
| 11 | NEW VISUAL PERCEPTUAL POOLING STRATEGY FOR IMAGE QUALITY ASSESSMENT显示文摘Most of Image Quality Assessment (IQA) metrics consist of two processes. In the first process, quality map of image is measured locally. In the second process, the last quality score is converted from the quality map by using the pooling strategy. The first process had been made effective and significant progresses, while the second process was always done in simple ways. In the second process of the pooling strategy, the optimal perceptual pooling weights should be determined and computed according to Human Visual System (HVS). Thus, a reliable spatial pooling mathematical model based on HVS is an important issue worthy of study. In this paper, a new Visual Perceptual Pooling Strategy (VPPS) for IQA is presented based on contrast sensitivity and luminance sensitivity of HVS. Experimental results with the LIVE database show that the visual perceptual weights, obtained by the proposed pooling strategy, can effectively and significantly improve the performances of the IQA metrics with Mean Structural SIMilarity (MSSIM) or Phase Quantization Code (PQC). It is confirmed that the proposed VPPS demonstrates promising results for improving the performances of existing IQA metrics. | Zhou Wujie Jiang Gangyi Yu Mei | 2012 | Journal of Electronics(China)2012，29，3： | 2 |
| 12 | CILP-2 is a novel secreted protein and associated with insulin resistance显示文摘Genetic association studies have implicated that cartilage intermediate layer protein 2 (CILP-2) confers the risk susceptibility for type 2 diabetes (T2DM). However, it is still unknown whether CILP-2 is involved in the regulation of glucose homeostasis and insulin resistance (IR). In the current study, we initially observed that CILP-2 as a secreted protein was detected in both conditioned medium and lysates of cells transfected with an overexpressed vector. We then found that circulating CILP-2 levels had a progressive increase from normal to impaired glucose tolerance (a pre-diabetic status) and then to diabetes, which was correlated positively with waist-to-hip ratio, triglyceride, fasting blood glucose, 2-h blood glucose after glucose overload, HbA1c, fasting insulin, 2-h plasma insulin after glucose overload, and homeostasis model assessment of insulin resistance but negatively with HDL-C. CILP-2 expression was increased in the liver and muscle but decreased in adipose tissues of obese mice or T2DM patients. Furthermore, we demonstrated that CILP-2 circulating levels were affected by OGTT and Exenatide. CILP-2 overexpression resulted in impaired glucose tolerance and hepatic IR in vivo and increased PEPCK expression whereas suppressed phosphorylation of insulin receptor and Akt kinase in vitro. Based on these findings, we have identified a direct interaction between CILP-2 and PEPCK and suggested that CILP-2 plays an important role in the regulation of hepatic glucose production. | Tong Wu Qin Zhang Shaobo Wu Wenjing Hu Tingting Zhou Ke Li Dongfang Liu Harvest FGu Hongting Zheng Zhiming Zhu Ling Li and Gangyi Yang | 2019 | Journal of Molecular Cell Biology2019，11，12： | 2 |
| 13 | A new method for adaptive color image filtering显示文摘An adaptive color image filter (ACIF) is proposed in this note. Through analyzing noise corruption of color image, efficient locally adaptive filters are chosen for image enhancement. The proposed adaptive color image filter combines advantages of both nonlinear vector filters and linear filters, it attenuates noise and preserves edges and details very well. Experimental results show that the proposed filter performs better than vector median filter, directional-distance filter, directional-magnitude vector filter, adaptive nearest-neighbor filter, and α-trimmed mean filter. | JIANG Gangyi, YU Mei & YU Bokang1. Department, of Information & Electronic Engineering, Hang/hou University of Commerce, Hangzhou 310035, China 2. Department, of Electronic Engineering, Hangzhou institute of Electronics Engineering, Hangzhou 310037, China 3. State Key Laboratory on Machine Perception, Peking University, Beijing 100871, China Correspondence should be addressed to Yu Mei | 2000 | Chinese Science Bulletin2000，45，13： | 2 |
| 14 | GLP ‐1 analogue prevents NAFLD in ApoE KO mice with diet and Acrp30 knockdown by inhibiting c‐ JNK显示文摘 | Lili Zhang Mengliu Yang Hong Ren Huaidong Hu Guenther Boden Ling Li Gangyi Yang | 2013 | Liver Int2013，，5： | 2 |
| 15 | HB(N_5)_3M(M=Li,Na,K,and Rb):A new kind of pentazolides as HEDMs显示文摘HB(N5)3M(M=Li,Na,K,and Rb) have been investigated as potential high-energy density materials in the present paper by means of density functional theory.They all show kinetic stabilities as to the breakup of N5 ring.Their kinetic stabilities decrease in the order of Li,Na,K,and Rb.Compared to HB(N5)3K and HB(N5)3Rb,HB(N5)3Li and HB(N5)3Na have higher transition state barriers and are of significantly higher energy content,and thus they are suggested to be more practical and suitable as potential high-energy density materials. | Jian Cui Yan Zhang Fengjuan Zhao Jing Yang Gangyi Shen Yu Xu | 2009 | Progress in Natural Science:Materials International2009，19，1： | 2 |
| 16 | Structural analysis of information digitization on process of Dujiangyan area in Sichuan earthquake(Ms 5.0)显示文摘This paper attempts to analyze geothermy revealed by the sounding data at 8 h and 20 h every day from China Meteorological Administration and the data counted per minute such as the wellhead temperature,the electromagnetic disturbance,the ground tilt and so of water level instrument in Sanxing of Chengdu with the method of information digitization.The result shows the recognizable differentiation of the change process before and after the earthquake,provides an analytic method for the improvement of earthquake prediction or prevention,and shows the feasible further research and the wide application prospect. | Chen Gangyi Lu Yajun Si Si Xu Shuisen Huang Wen | 2012 | Engineering Sciences2012，10，1： | 2 |
| 17 | Statistical Early Termination Model for Fast Mode Decision and Reference Frame Selection in Multiview Video Coding显示文摘 | Zhang Yun Sam K Jiang Gangyi | 2012 | IEEE Transactions on Broadcasting2012，58，1： | 1 |
| 18 | Joint bit allocation and rate control for coding multi-view video plus depth based 3D video显示文摘 | SHAO Feng JIANG Gangyi YU Mei et a1 | 2013 | IEEE Transactions on Multimedia2013，15，8： | 1 |
| 19 | Region-based Error Concealment of Right-view Frames for Stereoscopic Video Transmission 显示文摘 | ZHOU Yang JIANG Gangyi YU Mei | 2012 | Computers and Electrical Engineering(S0045-7906)2012，38，1： | 1 |
| 20 | A finite element analysis of ship sections subjected to underwater explosion显示文摘 | Jin Qiankun Ding Gangyi | 2011 | International Journal of Impact Engineering2011，38，7： | 1 |
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