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Automatic facade recovery from single nighttime image

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Frontiers of Computer Science 2020年第1期14卷 95-104页

作者： yi zhou Qichuan GENG Zhong zhou Wei WU State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijing 100083China

Nighttime images are difficult to process due to insufficient brightness,lots of noise,and lack of ***,they are always removed from time-lapsed image *** is interesting that nighttime images have a unique and wonderful building features that have robust and salient lighting cues from human *** variation depicts both the statistical and individual habitation,and it has an inherent man-made repetitive structure from architectural *** by this,we propose an automatic nighttime fa?ade recovery method that exploits the lattice structures of window ***,a simple but efficient classification method is employed to determine the salient bright regions,which may be lit *** we groupwindows into multiple lattice proposals with respect to fa?ades by patch matching,followed by greedily removing overlapping *** the horizon constraint,we solve the ambiguous proposals problem and obtain the correct ***,we complete the generated fa?ades by filling in the missing *** method is well suited for use in urban environments,and the results can be used as a good single-view compensation method for daytime *** method also acts as a semantic input to other learning-based 3D image reconstruction *** experiment demonstrates that our method works well in nighttime image datasets,and we obtain a high lattice detection rate of 82.1%of 82 challenging images with a low mean orientation error of 12.1±4.5 degrees.

关键词： facade recovery nighttime images lattice detection

Probabilistic verification of hierarchical leader election protocol in dynamic systems

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Frontiers of Computer Science 2018年第4期12卷 763-776页

作者： Yu zhou Nvqi zhou Tingting HAN Jiayi gu Weigang WU College of Computer Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China Department of Computer Science and Information Systems Birkbeck University of London London WC1E 7HX UK Department of Computer Science Sun Yat-sen University Guangzhou 510006 China

Leader election protocols are fundamental for coordination problems--such as consensus--in distributed computing. Recently, hierarchical leader election protocols have been proposed for dynamic systems where processes can dynamically join and leave, and no process has global information. However, quantitative analysis of such protocols is generally lacking. In this paper, we present a probabilistic model checking based approach to verify quantitative properties of these protocols. Particularly, we employ the compositional technique in the style of assume-guarantee reasoning such that the sub-protocols for each of the two layers are verified separately and the correctness of the whole protocol is guaranteed by the assume-guarantee rules. Moreover, within this framework we also augment the proposed model with additional features such as rewards. This allows the analysis of time or energy consumption of the protocol. Experiments have been conducted to demonstrate the effectiveness of our approach.

关键词： distributed computing hierarchical leader election protocol dynamic systems probabilistic model checking

Oxidation of emerging organic contaminants by in-situ H_(2)O_(2) fenton system

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Green Energy & Environment 2024年第3期9卷 417-434页

作者： Yuqin Ni Chuxiang zhou Mingyang Xing yi zhou State Environmental Protection Key Lab of Environmental Risk Assessment and Control on Chemical Processes School of Resources&Environmental EngineeringEast China University of Science and TechnologyShanghai200237China Key Laboratory for Advanced Materials and Institute of Fine Chemicals National Engineering Laboratory for Industrial Wastewater TreatmentSchool of Chemistry and Molecular EngineeringEast China University of Science and Technology130 Meilong RoadShanghai200237China Department of Applied Natural Sciences Technische Hochschule LubeckMonkhofer Weg 23923562 LubeckGermany

The existence and risk of emerging organic contaminants(EOCs)have been under consideration and paid much effort to degrade these *** system is one of the most widely used technologies to solve this *** original Fenton system relies on the hydroxyl radicals produced by Fe(Ⅱ)/H_(2)O_(2) to oxidize the organic ***,the application of the Fenton system is limited by its low iron cycling efficiency and the high risks of hydrogen peroxide transportation and *** introduction of external energy(including light and electricity etc.)can effectively promote the Fe(Ⅲ)/Fe(Ⅱ)cycle and the reduction of oxygen to produce hydrogen peroxide in *** review introduces three in-situ Fenton systems,which are electro-Fenton,Photo-Fenton,and chemical *** mechanism,influencing factors,and catalysts of these three in-situ Fenton systems in degrading EOCs are discussed *** review strengthens the understanding of Fenton and in-situ Fenton systems in degradation,offering further insight into the real application of the in-situ Fenton system in the removal of EOCs.

关键词： In-situ H_(2)O_(2)production Fenton Emerging organic contaminants Photocatalysis Electrocatalysis

Mechanism and characterization of microplastic aging process: A review

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Frontiers of Environmental Science & Engineering 2023年第8期17卷 107-125页

作者： Qinwei Lu yi zhou Qian Sui Yanbo zhou State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and TechnologyShanghai 200237China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

With the increasing production of petroleum-based plastics,the problem of environmental pollution caused by plastics has aroused widespread ***,which are formed by the fragmentation of macro plastics,are bio-accumulate easily due to their small size and slow degradation under natural *** aging of plastics is an inevitable process for their degradation and enhancement of adsorption performance toward pollutants due to a series of changes in their physiochemical properties,which significantly increase the toxicity and harm of ***,studies should focus on the aging process of microplastics through reasonable characterization methods to promote the aging process and prevent white *** review summarizes the latest progress in natural aging process and characterization methods to determine the natural aging mechanism of *** addition,recent advances in the artificial aging of microplastic pollutants are *** degradation status and by-products of biodegradable plastics in the natural environment and whether they can truly solve the plastic pollution problem have been *** from the literature pointed out that the aging process of microplastics lacks professional and exclusive characterization methods,which include qualitative and quantitative *** lessen the toxicity of microplastics in the environment,future research directions have been suggested based on existing problems in the current *** review could provide a systematic reference for in-depth exploration of the aging mechanism and behavior of microplastics in natural and artificial systems.

关键词： Microplastics Aging Degradation Characterization Mechanism

Global Regularity for Einstein-Klein-Gordon System with U(1)×R Isometry Group,I

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Chinese Annals of Mathematics,Series B 2020年第6期41卷 939-966页

作者： Haoyang CHEN yi zhou School of Mathematical Sciences Fudan UniversityShanghai 200433China

This is the first of the two papers devoted to the study of global regularity of the 3+1 dimensional Einstein-Klein-Gordon system with a U(1)×R isometry *** this first part,the authors reduce the Cauchy problem of the Einstein-Klein-Gordon system to a 2+1 dimensional ***,the authors will give energy estimates and construct the null coordinate system,under which the authors finally show that the first possible singularity can only occur at the axis.

关键词： Einstein-Klein Gordon system Cauchy problem Energy estimates Null coordinate First singularity

Emission reduction effects of the green energy investment projects of China in belt and road initiative countries

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Ecosystem Health and Sustainability 2020年第1期6卷 229-238,228页

作者： Alun gu Xiaoyu zhou Institute of Energy Environment and EconomyTsinghua UniversityBeijingChina

Investment and construction of power infrastructure are directly related to the achievement of sustainable development ***'s trade and investment with BRI(Belt and Road Initiative)countries have maintained growth *** development and construction of these investment projects certainly have impacts on the economic development mode and sustainable development goals of the *** collecting the basic information of the renewable energy investment projects,this paper compares and calculates the current power technology structure and grid emission factors of the host countries,and analyses the carbon emission level of electricity generation from the perspective of the whole life *** it as the benchmark,this paper also analyzes the current China's invested wind and solar energy projects and the carbon emission reduction benefits to the host *** results show that at present,China has about 36 renewable energy investment projects in BRI countries,with an installed capacity of 15.75GW(China as the project owner or investor),and achieve at least 48.69M tCO2 emission *** shows that China's effective investment and implementation of the green projects will provide a strong impetus for the energy transformation and the improvement of their energy security in BRI countries.

关键词： Belt and road initiative emission reduction impacts renewable energy investment projects China

珠江三角洲城市群留鸟多样性格局及其驱动机制

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中山大学学报（自然科学版）（中英文） 2025年第1期64卷 218-227页

作者：叶俊宏刘珍环杨帆魏莱周义广东省粤北岩溶区碳水耦合野外科学观测研究站/中山大学地理科学与规划学院广东广州510006

鸟类是反映城市生境和生物多样性变化的重要指标,城市鸟类多样性分布格局模拟与预测是当前城市生物多样性保护研究中重点关注的难题。珠江三角洲城市群经历了快速的城市化过程,景观变化显著,给城市生境和生物多样性保护带来了巨大挑战... 详细信息

鸟类是反映城市生境和生物多样性变化的重要指标,城市鸟类多样性分布格局模拟与预测是当前城市生物多样性保护研究中重点关注的难题。珠江三角洲城市群经历了快速的城市化过程,景观变化显著,给城市生境和生物多样性保护带来了巨大挑战。为解析城市鸟类多样性与城市生境之间的空间关联机制,构建“单物种分布预测-物种多样性聚类-多样性的影响归因”的空间综合途径,开展珠江三角洲城市群留鸟空间格局与形成机制研究。结果表明:1)珠江三角洲城市群的87种留鸟构成的多样性与适宜性具有高度的城-乡梯度分布模式;将留鸟的空间适宜性聚类可分为8类,总体上留鸟的中高适宜区占比小于30%。2)结构方程模型的解析可以发现,人类活动显著地正向影响了鸟类多样性的空间分布格局,影响系数介于0.28~1.94;而植被、气候、地形的正向或负向效应差异明显。研究可为城市生物多样性保护,调控鸟类多样性的生境影响因素,开展城市生态建设与管理提供科学依据。

关键词：城市生物多样性鸟类 MaxEnt模型结构方程模型

Evolution of chemistry and selection technology for DNA-encoded library

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Acta Pharmaceutica Sinica B 2024年第2期14卷 492-516页

作者： Peixiang Ma Shuning Zhang Qianping Huang Yuang gu Zhi zhou Wei Hou Wei yi Hongtao Xu Shanghai Key Laboratory of Orthopedic Implants Department of OrthopedicsShanghai Ninth People’s HospitalShanghai Jiao Tong UniversitySchool of MedicineShanghai 200025China Shanghai Institute for Advanced Immunochemical Studies ShanghaiTech UniversityShanghai 201210China guangzhou Municipal and guangdong Provincial Key Laboratory of Molecular Target&Clinical Pharmacology The NMPA and State Key Laboratory of Respiratory DiseaseGuangzhou Medical UniversityGuangzhou 511436China College of Pharmaceutical Science and Institute of Drug Development&Chemical Biology Zhejiang University of TechnologyHangzhou 310014China

DNA-encoded chemical library(DEL)links the power of amplifiable genetics and the nonself-replicating chemical phenotypes,generating a diverse chemical *** analogy with the biological world,the DEL world can evolve by using a chemical central dogma,wherein DNA replicates using the PCR reactions to amplify the genetic codes,DNA sequencing transcripts the genetic information,and DNA-compatible synthesis translates into chemical ***,DNA-compatible synthesis is the key to expanding the DEL chemical ***,the evolution-driven selection system pushes the chemicals to evolve under the selective pressure,i.e.,desired selection *** this perspective,we summarized recent advances in expanding DEL synthetic toolbox and panning strategies,which will shed light on the drug discovery harnessing in vitro evolution of chemicals via DEL.

关键词： DNA-encoded library Drug discovery High-throughput selection DNA-compatible synthesis In vitro evolution Chemical central dogma

Predictors for partial suppression of spermatogenesis of hormonal male contraception

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Asian Journal of Andrology 2008年第5期10卷 723-730页

作者： Jing-Wen Li yi-Qun gu peking Union Medical College Postgraduate School Beijing 100730 China National Research Institute for Family Planning Beijing 100081 China

Aim： To analyze factors influencing the efficacy of hormonal suppression of spermatogenesis for male contraception. Methods： A nested case-control study was conducted, involving 43 subjects, who did not achieve azoospermia or severe oligozoospermia when given monthly injections of 500 mg testosterone undecanoate （TU）, defined as partial suppressors compared with 855 subjects who had suppressed spermatogenesis （complete suppressors）. Sperm density, serum testosterone, luteinizing hormone （LH） and follicle stimulating hormone （FSH） concentrations at the baseline and the suppression phase were compared between partial and complete suppressors. Polymorphisms of androgen receptor （AR） and three single nucleotide variants and their haplotypes of FSH receptor （FSHR） genes determined by polymerase chain reaction （PCR） and DNA sequencing technique were compared between 29 partial and 34 complete suppressors. Results： Baseline serum LH level was higher and serum LH as well as FSH level during the suppression phase was less suppressed in partial suppressors. Additionally, in a logistic regression analysis larger testis volume, higher serum FSH concentrations alone, or interaction of serum LH, FSH, testosterone and sperm concentrations were associated with degree of suppression. The distribution of polymorphisms of AR or FSH receptor genes did not differ between partial and complete suppressors. In cases with incomplete FSH suppression （FSH 〉 0.2 IU/L）, the chances of reaching azoospermia were 1.5 times higher in the subjects with more than 22 CAG triplet repeats. Conclusion： Partial suppression of spermatogenesis induced by 500 mg TU monthly injections is weakly influenced by hormonal and clinical features but not polymorphism in AR and FSHR genes.

关键词： male contraception genetic polymorphism androgen receptor CAG repeats follicle stimulating hormone receptor single nucleotide polymorphism sperm concentration