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Joint regression and learning from pairwise rankings for personalized image aesthetic assessment

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Computational Visual Media 2021年第2期7卷 241-252页

作者： Jin Zhou Qing Zhang Jian-Hao Fan Wei Sun Wei-shi zheng School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 510006China. School of Computer Science and Engineering Sun Yat-sen UniversityGuangzhou 510006China Key Laboratory of Machine Intelligence and Advanced Computing Ministry of Education(Sun Yat-sen University)Guangzhou 510006China Peng Cheng Laboratory Shenzhen 518000China

Recent image aesthetic assessment methods have achieved remarkable progress due to the emergence of deep convolutional neural networks(CNNs).However,these methods focus primarily on predicting generally perceived preference of an image,making them usually have limited practicability,since each user may have completely different preferences for the same *** address this problem,this paper presents a novel approach for predicting personalized image aesthetics that fit an individual user’s personal *** achieve this in a coarse to fine manner,by joint regression and learning from pairwise ***,we first collect a small subset of personal images from a user and invite him/her to rank the preference of some randomly sampled image *** then search for the K-nearest neighbors of the personal images within a large-scale dataset labeled with average human aesthetic scores,and use these images as well as the associated scores to train a generic aesthetic assessment model by CNN-based ***,we fine-tune the generic model to accommodate the personal preference by training over the rankings with a pairwise hinge *** demonstrate that our method can effectively learn personalized image aesthetic preferences,clearly outperforming state-of-the-art ***,we show that the learned personalized image aesthetic benefits a wide variety of applications.

关键词： s personalized image aesthetic assessment deep convolutional neural networks pairwise ranking regression

Video-based measurement and data analysis of traffic flow on urban expressways

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Acta Mechanica Sinica 2011年第3期27卷 346-353页

作者： Xian-Qing zheng zheng Wu shi-Xiong Xu Ming-Min Guo Zhan-Xi Lin Ying-Ying Zhang Department of Mechanics and Engineering Science Fudan University 200433 Shanghai China

A new video-based measurement is proposed to collect and investigate traffic flow parameters. The output of the measurement is velocity-headway distance data pairs. Because density can be directly acquired by the reciprocal of headway distance, the data pairs have the advantage of better simultaneity than those from common detectors. By now, over 33 000 pairs of data have been collected from two road sections in the cities of Shanghai and zhengzhou. Through analyzing the video files recording traffic movements on urban expressways, the following issues are studied：laws of vehicle velocity changing with headway distance, proportions of di0erent driving behaviors in the traffic system, and characteristics of traffic flow in snowy days. The results show that the real road traffic is very complex, and factors such as location and climate need to be taken into consideration in the formation of traffic flow models.

关键词： Traffic flow mode - Video-based - Vehicle recog- nition. Driving behavior - Snowy day traffic

Proteomic Analyses of the Shrimp White Spot Syndrome Virus

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Virologica Sinica 2008年第3期23卷 157-166页

作者： Yan-wei TAN zheng-li shi State key Laboratory of Virology Wuhan Institute of Virology Chinese Academy of Sciences （CAS） Wuhan 430071 China

White spot syndrome virus (WSSV), a unique member within the virus family Nimaviridae, is the most notorious aquatic virus infecting shrimp and other crustaceans and has caused enormous economic losses in the shrimp farming industry worldwide. Therefore, a comprehensive understanding of WSSV morphogenesis, structural proteins, and replication is essential for developing prevention measures of this serious parasite. The viral genome is approximately 300kb and contains more than 180 open reading frames (ORF). However, most of proteins encoded by these ORF have not been characterized. Due to the importance of WSSV structural proteins in the composition of the virion structure, infection process and interaction with host cells, knowledge of structural proteins is essential to understanding WSSV entry and infection as well as for exploring effective prevention measures. This review article summarizes mainly current investigations on WSSV structural proteins including the relative quantities, localization, function and protein-protein interactions. Traditional proteomic studies of 1D or 2D gel electrophoresis separations and mass spectrometry (MS) followed by database searches have identified a total of 39 structural proteins. Shotgun proteomics and iTRAQ were initiated to identify more structural proteins. To date, it is estimated that WSSV is assembled by at least 59 structural proteins, among them 35 are defined as the envelope fraction (including tegument proteins) and 9 as nucleocapsid proteins. Furthermore, the interaction within several major structural proteins has also been investigated. This identitification and characterization of WSSV protein components should help in the understanding of the viral assembly process and elucidate the roles of several major structural proteins.

关键词： White spot syndrome virus (WSSV) Proteomic analysis Structural proteins

Realization of Quantum Logic Gates in Ion Traps Without Any Requirement on the Lamb-Dicke Parameter

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Chinese Physics Letters 2000年第5期17卷 321-323页

作者： zheng shi-Biao FENG Mang ZHU Xi-Wen Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsChinese Academy of SciencesWuhan 430071 Department of Electronic Science and Applied Physics Fuzhou UniversityFuzhou 350002

A scheme is presented for realizing quantum logic gate in an ion *** the scheme the state of the mth ion is Grst replicated onto the collective *** a transformation,conditional on the motional state,is performed on the nth *** the motional state is replicated back onto the mth *** this way the quantum logic gate between the mth and the nth ions is *** scheme does not put any requirement on the Lamb-Dicke parameter.

关键词： parameter Dicke collective

Genotyping of White Spot Syndrome Virus in Chinese Cultured Shrimp during 1998-1999

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Virologica Sinica 2011年第2期26卷 123-130页

作者： Yan-wei Tan zheng-li shi State Key Laboratory of Virology Wuhan Institute of Virology Chinese Academy of Sciences Wuhan 430071China

Recent studies showed that white spot syndrome virus(WSSV) isolates from different geographic locations share a high genetic similarity except the variable regions in ORF23/24 and ORF14/15,and variable number of tandem repeats(VNTR) within *** this study,genotyping was performed according to these three variable regions among WSSV isolates collected during 1998/1999 from Southern *** WSSV isolates contain a deletion of 1168,5657,5898,9316 and 11093 bp,respectively in the variable region ORF23/24 compared with WSSV-TW,and a deletion of 4749 or 5622 bp in the variable region ORF14/15 relative to *** types of repeat units(RUs)(6,8,9 and 13 RUs) in ORF94 were detected in these isolates,with the shortest 6 RUs as the most prevalent *** results provide important information for a better understanding of the spatio-temporal transmission mode and the WSSV genetic evolution lineage.

关键词： WSSV Genotyping Variable region ORF23/24 ORF 14/15 ORF94, China

Professor Hu Zhihong:The New President of the Society for Invertebrate Pathology

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Virologica Sinica 2018年第5期33卷 383-384页

作者： Basil Arif Jiali Si zheng-Li shi Scientist Emeritus Laboratory for Molecular VirologyGLFC Wuhan Institute of Virology Chinese Academy of Sciences

The Society for Invertebrate Pathology (SIP)is foremost in the world covering all aspects of related research in insect virology,bacteriology,mycology,parasitology and microbial *** SIP has a wide scientific appeal with members from many countries spanning every continent in the *** of members to the Society's Governing Council is based on scientific standing,contributions, reputation and involvement in the activities of the Society.

关键词： Professor Hu Zhihong:The New President of the Society for Invertebrate Pathology

Highly rarefied gas flows in rough channels of finite length

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Advances in Aerodynamics 2023年第1期5卷 558-578页

作者： zheng shi Yulong Zhao Wei Su Lei Wu Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu 610500China Division of Emerging Interdisciplinary Areas The Hong Kong University of Science and TechnologyClear Water BayHong KongChina Department of Mathematics The Hong Kong University of Science and TechnologyClear Water BayHong KongChina

Highly rarefied gas flows through a rough channel of finite length with small bumps appended to its surfaces are investigated,by varying the accommodation coefficientin Maxwell’s diffuse-specular boundary condition,the characteristic size and position of the bumps,and the channel ***,we study the influence of the surface bumps and consider the rarefied gas flow in a unit channel with periodic boundary conditions to remove the end *** is found that the surface bumps have a significant impact on the flow ***is very small(i.e.,nearly specular reflection of gas molecules at the channel surface),the apparent gas permeability is dramatically reduced,even in the presence of small bumps,to a value that is almost comparable to the one when fully diffuse gas-surface scattering is *** impact can be taken into account through an effective accommodation coefficient,i.e.,the permeability of the rough channel is taken equivalently as that of a smooth channel without bumps but having gas-surface scattering under the effective accommodation ***,we study the end effect by connecting a smooth channel of length L_(0) to two huge gas *** is found that(i)the end correction length is large at small.Consequently,the mass flow rate barely reduces with increasing L_(0) rather than scales down by a factor of 1/L_(0) as predicted by the classical Knudsen diffusion theory;and(ii)the end correction is related to the channel’s aspect ***,based on the effective accommodation coefficient and end correction,we explain the exotic flow enhancement in graphene angstrom-scale channels observed by Geim’s research group(Keerthi et al,Nature 558:420-424,2018).

关键词： Rarefied gas Accommodation coefficient Rough channel End effect

SVM based layout retargeting for fast and regularized inverse lithography

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第5期15卷 390-400页

作者： Kai-sheng LUO zheng shi Xiao-lang YAN Zhen GENG Institute of VLSI Design Zhejiang University

Inverse lithography technology(ILT),also known as pixel-based optical proximity correction(PB-OPC),has shown promising capability in pushing the current 193 nm lithography to its *** treating the mask optimization process as an inverse problem in lithography,ILT provides a more complete exploration of the solution space and better pattern fidelity than the traditional edge-based ***,the existing methods of ILT are extremely time-consuming due to the slow convergence of the optimization *** address this issue,in this paper we propose a support vector machine(SVM)based layout retargeting method for ILT,which is designed to generate a good initial input mask for the optimization process and promote the convergence *** by optimized masks of training layouts generated by conventional ILT,SVM models are learned and used to predict the initial pixel values in the‘undefined areas’of the new *** this process,an initial input mask close to the final optimized mask of the new layout is generated,which reduces iterations needed in the following optimization *** is another critical issue in ILT;however,the mask generated by our layout retargeting method is quite irregular due to the prediction inaccuracy of the SVM *** compensate for this drawback,a spatial filter is employed to regularize the retargeted mask for complexity *** implemented our layout retargeting method with a regularized level-set based ILT(LSB-ILT)algorithm under partially coherent illumination *** results show that with an initial input mask generated by our layout retargeting method,the number of iterations needed in the optimization process and runtime of the whole process in ILT are reduced by 70.8%and 69.0%,respectively.

关键词： Inverse lithography technology Optical proximity correction Layout retargeting Support vector machine

Clinical Features and Treatment of 2019-nCov Pneumonia Patients in Wuhan: Report of A Couple Cases

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Virologica Sinica 2020年第3期35卷 330-336页

作者： Zhan Zhang Xiaochen Li Wei Zhang zheng-Li shi Zhishui zheng Tao Wang Department of Respiratory Disease and Intensive Care Renmin Hospital of Wuhan UniversityWuhan 430060China CAS Key Laboratory of Special Pathogens Wuhan Institute of VirologyCenter for Biosafety Mega-ScienceChinese Academy of SciencesWuhan 430071China

Dear Editor,Till January 20, 2020, the 2019-new coronavirus(2019-nCoV) has caused more than one hundred cases in Wuhan(WMHC 2020). During a retrospective study of recent pneumonia patients in our department, we found ... 详细信息

关键词： patients Patients Clinical