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Dynamic Scene Graph Generation of Point Clouds with Structural Representation Learning

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Tsinghua Science and Technology 2024年第1期29卷 232-243页

作者： Chao Qi Jianqin Yin zhicheng Zhang jin Tang School of Artificial Intelligence Beijing University of Posts and TelecommunicationsBeijing 100876China Standard and Metrology Research Institute China Academy of Railway Sciences Corporation LimitedBeijing 100081China

Scene graphs of point clouds help to understand object-level relationships in the 3D *** graph generation methods work on 2D structured data,which cannot be used for the 3D unstructured point cloud *** point-cloud-based methods generate the scene graph with an additional graph structure that needs labor-intensive manual *** address these problems,we explore a method to convert the point clouds into structured data and generate graphs without given ***,we cluster points with similar augmented features into groups and establish their relationships,resulting in an initial structural representation of the point ***,we propose a Dynamic Graph Generation Network(DGGN)to judge the semantic labels of targets of different *** dynamically splits and merges point groups,resulting in a scene graph with high *** show that our methods outperform other baseline *** output reliable graphs describing the object-level relationships without additional manual labeled data.

关键词： scene graph generation structural representation point cloud

Efficient removal of natural organo-chromium(Ⅲ)through selfcirculating decomplex and immobilization with nanoscale zerovalent iron

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Nano Research 2024年第1期17卷 364-371页

作者： zhicheng Dong Yunyun Xu Can Wu jin Chao Chen Tian Zhang Lin School of Metallurgy and Environment Central South UniversityChangsha 410083China Chinese National Engineering Research Center for Control&Treatment of Heavy Metal Pollution Changsha 410083China College of Ecology and Environment Chengdu University of TechnologyChengdu 610059China School of Environment and Energy The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters(Ministry of Education)South China University of TechnologyGuangzhou 510006China

Organo-chromium(III)complex is one of the chromium contaminant species,which would transform to high-toxic Cr(VI)during migrating in the *** natural organo-chromium(III)(NOCr)is difficult to remove by traditional degradation or precipitation methods,due to its high stability and ***,we demonstrated a novel NOCr removing method by transforming it to certain structures similar to Cr-Fe minerals in nature,through a self-circulating decomplex and immobilization mechanism with nano zero-valent iron(nZVI).Taking chromium glycinate(Cr-Gly)as a probe,nZVI showed a high Cr removal efficiency of 99.4%under ambient *** removal process included three stages of adsorption,decomplexation,and ***-Gly was first adsorbed on the surface of nZVI by chemisorption of the oxide ***,the adsorbed Cr-Gly was decomplexed and oxidized to Cr(VI)by·OH and 1O_(2),which were generated from molecular oxygen activated by ***,the released Cr(VI)could be in-situ adsorbed and re-reduced to Cr(III),which was further immobilized in form of Cr-O-Fe *** the Cr-O-Fe complexing structure was similar to that of Cr-Fe minerals(such as chromohercynite)in nature,this work explored a novel and efficient NOCr removing method that was potential to weaken chromium pollution in the environment.

关键词： organo-chromium(III) zero-valent iron adsorption decomplexation Cr immobilization

Polybrominated biphenyl exposure and thyroid function tests in electronic waste dismantling and general population of Chinese adults

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Emerging Contaminants 2024年第1期10卷 72-79页

作者： shijie wang jingxi jin Zhitong Zhang Chen Guo Zhigang Li Jicheng Hu Ying wang Yongjie Wei Jun jin College of Life and Environmental Sciences Minzu University of ChinaBeijing 100081China Department of Laboratorial Science and Technology School of Public HealthPeking UniversityBeijing 100191China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Engineering Research Center of Food Environment and Public Health Beijing 100081China Center for Global Health School of Public HealthNanjing Medical UniversityChina

This study aimed to determine the concentration of 35 PBB(polybrominated biphenyls)congeners in the human serum of residents from an electronic waste(e-waste)dismantling area compared to a control area in ***,four thyroid hormones,namely FT3,FT4,TSH,and TRH,were also *** findings revealed that the total PBB concentrations(sum of the 35 PBB congeners)ranged from 47.1 to 1360 ng/g lipid in the e-waste area and 105–1980 ng/g lipid in the control ***-1 and BB-10 were the dominant congeners in both study areas,followed by *** to the e-waste dismantling area,the control area samples had a significantly higher concentration of less-brominated(Br1–3)PBBs,including the concentrations of less-brominated congeners such as BB-1,BB-4,BB-9,and BB-10,which were significantly higher than those in the e-waste dismantling ***,more-brominated hexabromobiphenyl congeners BB-153,BB-154 and BB-155 were found in samples from the e-waste dismantling area at significantly higher concentrations than in the control area.E-waste dismantling areas have released historically produced commercial PBB products,but equally not negligible is the exposure of the general population to newly produced PBB *** concentrations in the e-waste dismantling area samples decreased with increasing age,while they increased with increasing age in the control area ***,stepwise multiple regression analysis showed a significant association between BB-103 concentrations and thyroid hormone *** addition,BB-103 has the potential to interfere with the binding of T3 and thyroid hormone receptors(TR).Given these findings,the research on human exposure of PBB and the relationships between the PBB and thyroid hormones should be studied further.

关键词： Polybrominated biphenyls Human serum E-waste Thyroid hormone Human exposure

Yolk shell-structured pyrite-type cobalt sulfide grafted by nitrogen-doped carbon-needles with enhanced electrical conductivity for oxygen electrocatalysis

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Chinese Chemical Letters 2024年第7期35卷 212-217页

作者： Jiahao Xie jin Liu Bin Liu Xin Meng Zhuang Cai Xiaoqin Xu Cheng wang shijie You jinlong Zou Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People’s Republic of ChinaSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China

Pyrite-type sulfides(PTS)exhibit promising intrinsic activities for oxygen reduction and evolution reactions(ORR/OER).However,their poor electrical conductivities may limit the charge transfer rate to inevitably lower ***,yolk-shell structured cobalt-pyrite nanospheres(CoS_(2)YSS)are prepared and modified with amino groups as nucleation sites for coupling highly-conductive needle-like nitrogendoped carbon via a facile solvothermal method(CoS_(2)YSS@NC).The as-marked CoS_(2)YSS@NC-0.5 shows a gap between yolk and shell,and an obvious exterior layer of grafted NC,which can provide an integrated structure,an interior place,and three exposed surfaces on CoS_(2).CoS_(2)YSS@NC-0.5 reveals higher ORR activity(half-wave potential of 0.88 V)and methanol resistance than commercial Pt/*** to in-situ formation of highly-active CoOOH,CoS_(2)YSS@NC-0.5 shows a better overpotential(244 mV at 10 mA/cm^(2))and Tafel slope(135 mV/dec)than ***-air battery with CoS_(2)YSS@NC-0.5 air-cathode exhibits good open circuit potential(1.44 V),specific capacity(772.5 mAh/g)and cycling ***-like NC layer coated on the yolk-shell structure of CoS_(2)effectively lowers the charge transfer resistance to obtain extraordinary ORR/OER *** indicates that the integration of highly-conductive carbon onto pyritetype sulfides is an effective strategy to acquire durable bifunctional ORR/OER catalysts.

关键词： Cobalt sulfides Cycle stability Electrical conductivity Pyrite Yolk-shell structure

Updated prevalence of latent prostate cancer in Chinese population and comparison of biopsy results: An autopsy-based study

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The Innovation 2024年第1期5卷 80-87页

作者： Yuliang Chen Zhien Zhou Yi Zhou Zhipeng Mai shijie jin Zhen Liang Zhiyuan Shang Yuzhi Zuo Yu Xiao Wenze wang Haibo wang Weigang Yan Department of Urology Peking Union Medical College HospitalChinese Academy of Medical SciencesBeijing 100730China Department of Gynaecology and Obstetrics Beijing HospitalNational Centre of GerontologyBeijing 100730China Department of Pathology Peking Union Medical College HospitalChinese Academy of Medical SciencesBeijing 100730China Peking University Clinical Research Institute Peking University First HospitalBeijing 100034China

Prostate cancer detected by autopsy is named latent prostate *** the repertoire of clinical prostate cancer,latent cancer may better reflect the disease *** clinical prostate specimens,which are obtained exclusively from biopsy-positive cases,prostate specimens obtained through autopsy provide information on biopsy-negative cases,helping calculate the true sensitivity of prostate *** 2014 to 2021,we collected autopsy specimens of the prostate from body donors in China and performed transperineal and transrectal biopsies on specimens before step-sectioning and pathological *** found that the crude prevalence of latent prostate cancer in middle-aged and elderly men was 35.1%(81/231),which was higher than previous estimates for Chinese *** overall per-patient sensitivities of transperineal and transrectal biopsies were not significantly different(33.3%vs.32.1%,p=0.82),but the two approaches differed in preferential sampling area along the proximal-distal axis of the *** biopsy had a higher sensitivity for detecting clinically significant lesions in the distal third(34.7%vs.16.3%,p=0.02)and distal half(30.6%vs.18.1%,p=0.04),while transrectal biopsy had a higher sensitivity for lesions in the proximal half(25.0%vs.13.9%,p=0.046).Both transperineal and transrectal methods of biopsy missed most small lesions(0.5 mL).In conclusion,the prevalence of latent prostate cancer in China has increased over the past 2 *** transperineal and transrectal methods of biopsy had comparable sensitivities but had different preferential sampling *** approaches miss one-third of large lesions.

关键词： biopsy prevalence latent

Expression analysis of the R2R3-MYB gene family in upland cotton and functional study of GhMYB3D5 in regulating Verticillium wilt resistance

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Journal of Integrative Agriculture 2024年第10期23卷 3294-3310页

作者： Jie Liu zhicheng wang Bin Chen Guoning wang Huifeng Ke jin Zhang Mengjia Jiao Yan wang Meixia Xie Yanbin Li Dongmei Zhang Xingyi wang Qishen Gu Zhengwen Sun Liqiang Wu Xingfen wang Zhiying Ma Yan Zhang State Key Laboratory of North China Crop Improvement and Regulation/North China Key Laboratory for Germplasm Resources Ministry of Education/College of AgronomyHebei Agricultural UniversityBaoding 071001China

Improving plant resistance to Verticillium wilt(VW),which causes massive losses in Gossypium hirsutum,is a global *** plants need to efficiently allocate their limited energy resources to maintain a balance between growth and ***,few transcriptional regulators specifically respond to Verticillium dahliae and the underlying mechanism has not been identified in *** this study,we found that the that expression of most R2R3-MYB members in cotton is significantly changed by *** infection relative to the other MYB *** novel R2R3-MYB transcription factor(TF)that specifically responds to ***,GhMYB3D5,was ***3D5 was not expressed in 15 cotton tissues under normal conditions,but it was dramatically induced by *** *** functionally characterized its positive role and underlying mechanism in VW *** *** infection,the up-regulated GhMYB3D5 bound to the GhADH1 promoter and activated *** addition,GhMYB3D5 physically interacted with GhADH1 and further enhanced the transcriptional activation of ***,the transcriptional regulatory module GhMYB3D5-GhADH1 then promoted lignin accumulation by improving the transcriptional levels of genes related to lignin biosynthesis(GhPAL,GhC4H,Gh4CL,and GhPOD/GhLAC)in cotton,thereby enhancing cotton VW *** results demonstrated that the GhMYB3D5 promotes defense-induced lignin accumulation,which can be regarded as an effective way to orchestrate plant immunity and growth.

关键词： cotton Verticillium wilt resistance GhMYB3D5 GhADH1 transcriptional regulatory module

Silicon photonic integrated interrogator for fiber-optic distributed acoustic sensing

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Photonics Research 2024年第3期12卷 465-473页

作者： zhicheng jin JIAGENG CHEN YANMING CHANG QINGWEN LIU ZUYUAN HE State Key Laboratory of Advanced Optical Communication System and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Distributed acoustic sensing(DAS)technology has been a promising tool in various ***,the large size and relatively high cost of DAS equipment composed of discrete devices restrict its further popularization to some degree,and the photonic integration technology offers a potential *** this paper,we demonstrate an integrated interrogator for DAS on the silicon-on-insulator(SOI)*** design of the chip revolves around a Mach–Zehnder modulator(MZM)transmitter and a dual-quadrature and dualpolarization coherent *** integrated interrogator supports multiple DAS schemes,including the time-gated digital optical frequency domain reflectometry(TGD-OFDR),which is adopted for system performance evaluation.59■strain resolution in 12.1km sensing fiber with 1.14 m spatial resolution(SR)is ***,along 49.0 km sensing fiber,81■strain resolution with 3.78 m SR is *** results show that the integrated interrogator has comparable performance to the discrete DAS *** the best of our knowledge,this is the first dedicated on-chip DAS interrogator,which validates the effectiveness of the blend of photonics integration and DAS technology.

关键词： fiber polarization modulator

Radical cascade cyclization for the green and simple synthesis of silylated indolo[2,1-a]isoquinoline derivatives via visible light-mediated Si–H bonds activation

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Chinese Chemical Letters 2024年第1期35卷 243-249页

作者： Zhenkai Lei Fei Xue Bin wang shijie wang Yu Xia Yonghong Zhang Weiwei jin Chenjiang Liu State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources Key Laboratory of Oil and Gas Fine ChemicalsMinistry of Education&Xinjiang Uygur Autonomous RegionUrumqi Key Laboratory of Green Catalysis and Synthesis TechnologyCollege of ChemistryXinjiang UniversityUrumqi 830017China College of Future Technology Institute of Materia Medic1Xinjiang UniversityUrumqi 830017China Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute Urumqi 830011China

Photocatalytic and photoinduced silyl radicals cascade cyclization procedures for the green and simple preparation of fused tetracyclic skeleton silylated indolo[2,1-a]isoquinoline-6(5H)-ones from 2-aryl-N-acryloyl indoles with hydrosilanes are *** photocatalytic reaction is carried out with 9,10-dicyanoanthracene(DCA)as an organophotocatalyst and 3-acetoxyquinuclidine as hydrogen atom transfer(HAT)catalyst at room temperature under metal-and oxidant-free *** keys to the success of photoredox-catalytic conversion include(1)the reductive quenching of DCA^(*)[E_(1/2)(*P/P^(-))=+1.97 V *** in MeCN]by 3-acetoxyquinuclidine(E_(p)=+1.22 V *** in MeCN),and(2)the thermodynamic feasibility of hydrogen atom abstraction from hydridic Si-H bond by electrophilic N^(+·).Particularly,the simple photoinduced cascade cyclization using(TMS)3SiH with 2-aryl-N-acryloyl indoles was exploited via an electron-donor-acceptor(EDA)complex under visible light irradiation.

关键词： Indolo[2,1-a]isoquinolines Silyl radicals Green photocatalytic Simple photoinduced Silylated Hydrogen atom transfer EDA complex

The GECAM Real-time Burst Alert System

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Research in Astronomy and Astrophysics 2024年第10期24卷 36-47页

作者： Yue Huang Dongli Shi Xiaolu Zhang Xiang Ma Peng Zhang shijie Zheng Liming Song Xiaoyun Zhao Wei Chen Rui Qiao Xinying Song jin wang Ce Cai Shuo Xiao Yanqiu Zhang Shaolin Xiong Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Southwest Jiaotong University Chengdu 611756China Qufu Normal University Qufu 273165China College of Electronic and Information Engineering Tongji UniversityShanghai 201804China College of Physics and Hebei Key Laboratory of Photophysics Research and Application Hebei Normal UniversityShijiazhuang 050024China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal UniversityGuiyang 550001China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100049China

Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM),consisting of two microsatellites,is designed to detect gamma-ray bursts associated with gravitational-wave ***,we introduce the real-time burst alert system of GECAM,with the adoption of the BeiDou-3 short message communication *** present the post-trigger operations,the detailed ground-based analysis,and the performance of the *** the first year of the in-flight operation,GECAM was triggered by 42 gamma-ray *** GECAM real-time burst alert system has the ability to distribute the alert within~1 minute after being triggered,which enables timely follow-up observations.

关键词： (stars:)gamma-ray burst:general gravitational waves methods:data analysis