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A CSCW SYSTEM FOR BUILDING REVIEWING BY INTEGRATING GIS WITH OA

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Geo-Spatial Information Science 2000年第1期3卷 45-49页

作者： JIANG Jie CHEN jun yan Ronghua xu Lilin Beijing Graduate School China University of Mining and Technology

The process of urban building reviewing is a collaborative work by a group of urban planning staffs and land managers who are working with different departments of a organization. There are three ingredients for improving the work efficiency, i.e., agile communication and interactive mechanisms, good information, effective processing and visualizing tools. In order to build a computer supported collaborative work (CSCW) system in Urban Planning and Land Administration Bureau in Changzhou Municapality, GIS was integrated with office automation (OA). The workflow and organizational structure had been re-engineered to meet the requirement of application of the new technology. Federated databases were constructed by assembling disparate sources of heterogeneous spatial and attribute data. Easy access to the data by contents was developed for promoting information sharing within the organization. Specific desktop spatial data handling tools were provided for delineating land lots or building layouts on large-scale digital maps. Office automation functions, including applications registering, reasonableness checking, opinions giving and exchanging, were developed and they permit printing and documents filing. The work efficiency in the organization has been improved by introducing the computer-based collaborative building reviewing system.

关键词： CSCW System office automation

Optimal two-impulse space interception with multiple constraints

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Frontiers of Information Technology & Electronic Engineering 2020年第7期21卷 1085-1107页

We consider optimal two-impulse space interception problems with multiple *** multiple constraints are imposed on the terminal position of a space interceptor,impulse and impact instants,and the component-wise magnitudes of velocity *** optimization problems are formulated as multi-point boundary value problems and solved by the calculus of *** variable methods are used to convert all inequality constraints into equality constraints so that the Lagrange multiplier method can be used.A new dynamic slackness variable method is *** a result,an indirect optimization method is ***,our method is used to solve the two-impulse space interception problems of free-flight ballistic missiles.A number of conclusions for local optimal solutions have been drawn based on highly accurate numerical ***,by numerical examples,we show that when time and velocity impulse constraints are imposed,optimal two-impulse solutions may occur;if two-impulse instants are free,then a two-impulse space interception problem with velocity impulse constraints may degenerate to a one-impulse case.

关键词： Space interception problems Variational method Multiple constraints Two-velocity impulses Multi-point boundary value problems Local optimal solutions Dynamic slackness variable method

Direct Observation of Electron-Vibration Coupling at MXene-Solvent Interface

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Chinese Journal of Chemical Physics 2021年第5期34卷 605-612,I0003页

作者： yan-jun xu He-yuan Liu Hai-long Chen The Laboratory of Soft Matter Physics Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Science University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China

MXenes,a new family of two-dimensional(2D)materials,have received extensive interest due to their fascinating physicochemical properties,such as outstandinglight-to-heat conversion ***,the photothermal conversion mechanism of MXenes is still poorly ***,by using femtosecond visible and mid-infrared transient absorption spectroscopy,the electronic energy dissipation dynamics of MXene(Ti_(3)C_(2)T_(x))nanosheets dispersed in various solvents are carefully *** results indicate that the lifetime of photoexcited MXene is strongly dependent on the surrounding ***,the interfacial electron-vibration coupling between the MXene nanosheets and the adjacent solvent molecules is directly observed following the ultrafast photoexcitation of *** suggests that the interfacial interactions at the MXene-solvent interface play a critical role in the ultrafast energy transport dynamics of MXene,which offers a potentially feasible route for tailoring the light conversion properties of 2D systems.

关键词： MXene Ultrafast spectroscopy Photothermal conversion Electron-vibration coupling

High Solids-Content Nanosize Polymeric Microlatexes Made by Microemulsion Copolymerization at Ambient Temperature

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Journal of Wuhan University of Technology(Materials Science) 2004年第1期19卷 30-33,40页

作者：柯昌美 Wuhan University of Science and Technology

The microemulsion copolymerizations of acrylic acid (AA),acrylamide (AM),N-methylol acrylamide (NMA),methylmethacrylate (MMA),butyl acrylate (BA) and acrylonitrile (AN) initiated by the redox initiator ammonium persulfate (APS) and N,N,N′,N′-tetramethylethylenediamine (TMEDA) at ambient temperature were *** this process high solids-content (44.0 wt%) and small (less than 50 nm) particle diameter copolymer latexes were *** effects of surfactants,the mechanical stabilities and application properties as an environmentally friendly self-crosslinking pigment printing binder with multifunctional groups were studied.

关键词： microemulsion nanoparticle high solids-content binder

CsCl/NH_4 β沸石固态离子交换过程

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无机化学学报 1998年第4期14卷 422-425页

作者：徐军严爱珍须沁华南京大学化学系

采用ＸＲＤ和ＴＧＤＴＡ技术考察了ＮＨ４β沸石和ＣｓＣｌ的固态离子交换过程，并用吡啶ＩＲ和异丙醇分解反应研究了Ｃｓβ沸石的酸碱性质。结果显示Ｃｓ＋离子易以极高离子交换度引入β沸石，由固态离子交换得到的Ｃｓβ具有更高... 详细信息

采用ＸＲＤ和ＴＧＤＴＡ技术考察了ＮＨ４β沸石和ＣｓＣｌ的固态离子交换过程，并用吡啶ＩＲ和异丙醇分解反应研究了Ｃｓβ沸石的酸碱性质。结果显示Ｃｓ＋离子易以极高离子交换度引入β沸石，由固态离子交换得到的Ｃｓβ具有更高的碱催化脱氢能力。

关键词： β沸石铯离子固态离子交换酸碱性催化剂

Cs改性X型沸石上甲苯和甲醇的侧链烷基化反应

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无机化学学报 1998年第4期14卷 426-430页

作者：徐军严爱珍须沁华南京大学化学系

研究了碱金属离子交换和ＣｓＮＯ３负载改性Ｘ型沸石上甲苯和甲醇的侧链烷基化反应。实验结果显示碱金属离子交换Ｘ型沸石由于碱性较弱其碱催化脱氢能力和侧链烷基化反应活性较低，而在Ｃｓ负载改性Ｘ型沸石上，由于ＣｓＮＯ３负载物形... 详细信息

研究了碱金属离子交换和ＣｓＮＯ３负载改性Ｘ型沸石上甲苯和甲醇的侧链烷基化反应。实验结果显示碱金属离子交换Ｘ型沸石由于碱性较弱其碱催化脱氢能力和侧链烷基化反应活性较低，而在Ｃｓ负载改性Ｘ型沸石上，由于ＣｓＮＯ３负载物形成新的强碱位，能有效催化甲醇脱氢，表现出高的侧链反应活性。实验发现侧链烷基化反应产物收率（ＹＥＢ＋Ｓｔｙ）与异丙醇分解产物丙酮选择性（ＳｅｌＡ）之间有极好的关联。

关键词：沸石催化剂甲苯甲醇侧链烷基化苯乙烯乙苯

Estimation of cancer burden in Guangdong Province,China in 2009

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Chinese Journal of Cancer 2015年第12期34卷 594-601页

作者： Su-Mei Cao yan-jun xu Guo-Zhen Lin Qi-Hong Huang Kuang-Rong Wei Shang-Hang Xie Qing Liu State Key Laboratory of Oncology in South China Collaborative Innovation Center for Cancer MedicineSun Yat-sen University Cancer Center Department of Cancer Prevention Sun Yat-sen University Cancer Center Institute of Control and Prevention for Chronic Non-infective Disease Guangdong Provincial Center for Disease Control and Prevention Department of Disease Surveillance Guangzhou Center for Disease Control and Prevention Sihui Institute of Cancer Institute of Cancer Zhongshan People's Hospital

Background:Surveying regional cancer incidence and mortality provides significant data that can assist in making health policy for local areas;however,the province- and region-based cancer burden in China is seldom *** this study,we estimated cancer incidence and mortality in Guangdong Province,China and presented basic information for making policies related to health resource allocation and disease ***:A log-linear model was used to calculate the sex-,age-,and registry-specific ratios of incidence to mortality(l/M) based on cancer registry data from Guangzhou,Zhongshan,and Sihui between 2004 and *** cancer incidences in 2009 were then estimated according to representative l/M ratios and the mortality records from eight death surveillance sites in Guangdong *** cancer incidences in each city were estimated by the corresponding sex- and age-specific incidences from cancer registries or death surveillance sites in each ***,the total and region-based cancer incidences and mortalities for the entire population of Guangdong Province were ***:The estimated l/M ratios in Guangzhou(3.658),Zhongshan(2.153),and Sihui(1.527) were significantly different(P < 0.001),with an average l/M ratio of *** differences in the estimated l/M ratios were observed between distinct age groups and the three cancer *** estimated l/M ratio in females was significantly higher than that in males(2.864 vs.2.027,P < 0.001).It was estimated that there were 163,376 new cancer cases(99,689 males and 63,687 females) in 2009;it was further estimated that 115,049 people(75,054 males and 39,995females) died from cancer in Guangdong Province in *** estimated crude and age-standardized rate of incidences(ASRI) in Guangdong Province were 231.34 and 246.87 per 100,000 males,respectively,and 156.98 and 163.57 per 100,000 females,*** estimated crude and age-standardized rate of mortalities(ASRM) in Guangdong Pro

关键词： Disease burden, Incidence-to-mortality ratio, Loq-linear model

Relationships between Weight Status and Bullying Victimization among School-aged Adolescents in Guangdong Province of China

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Biomedical and Environmental Sciences 2010年第2期23卷 108-112页

作者： QIAO-ZHI GUO, WEN-jun MA, SHAO-PING NIE, yan-jun xu, HAO-FENG xu, AND YU-RUN ZHANG Department of Noncommunicable Disease Control and Prevention, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 510300, Guangdong, China [a] Department of Noncommunicable Disease Control Prevention Guangdong Provincial Center for Disease Control Prevention Guangzhou 510300 Guangdong China

Objective To examine relationships between weight status and different forms of bullying victimization among adolescents aged 11-18 years. Methods The relationships between weight status and bullying victimization （physical, verbal, and relational） were examined utilizing data from the Guangdong Provincial Youth Health Behavior Survey. Data on height, weight, and victimization behaviors were collected by self-reporting from 12 439 subjects, Х^2 test and logistic regression were used to analyze relationships between weight and bullying victimization. Results The incidence of victimization for adolescents aged 11-18 years was 8.6%, with higher rates for boys （12.4%） than for girls （4.7%）. For children with normal, overweight and obese body mass index （BMI）, the incidence rates of victimization were 8,2%, 17.3%, and 11.5%, respectively. Compared to normal weight, overweight was a risk factor for bullying victimization（OR=1.60, 95% CI： 1.18-2.17）, and it also increased children＇s risk of being teased in a hurtful way （OR=2.13, 95% CI： 1.41-3.24） and being made fun of due to physical appearance （OR=3.58, 95% CI： 2.27-5.67）. Obesity only increased the risk for children of being made tim of due to physical appearance （OR=2.45, 95% CI： 1.44-4.15）. Conclusions The victimization for children at school is common in Guangdong province, China. Overweight and obese children are more likely to be victims of bullying behaviors, especially verbal victimization.

关键词： Body mass index Adolescents Victimization

Combined use of non-biological artif icial liver treatments for patients with acute liver failure complicated by multiple organ dysfunction syndrome

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World Journal of Emergency Medicine 2014年第3期5卷 214-217页

作者： Mao-qin Li jun-xiang Ti Yun-hang Zhu Zai-xiang Shi Ji-yuan xu Bo Lu Jia-qiong Li Xiao-meng Wang yan-jun xu Department of Intensive Care Xuzhou Central HospitalAffiliated to School of MedicineSoutheast University

BACKGROUND:Acute liver failure(ALF) caused by viral and non-viral hepatitis is often accompanied with severe metabolic disorders,the accumulation of toxic substances and continuous release and accumulation of a large number of endogenous toxins and inflammatory mediators. The present study aimed to investigate the effects of various combined non-biological artif icial liver treatments for patients with acute liver failure(ALF) complicated by multiple organ dysfunction syndrome(MODS).METHODS:Thirty-one patients with mid- or late-stage liver failure complicated by MODS(score 4) were randomly divided into three treatment groups:plasmapheresis(PE) combined with hemoperfusion(HP) and continuous venovenous hemodiafiltration(CVVHDF),PE+CVVHDF,and HP+CVVHDF,respectively. Heart rate(HR) before and after treatment,mean arterial pressure(MAP),respiratory index(PaO2/FiO2),hepatic function,platelet count,and blood coagulation were ***:Signifi cant improvement was observed in HR,MAP,PaO2/FiO2,total bilirubin(TBIL) and alanine aminotransferase(ALT) levels after treatment(P<0.05). TBIL and ALT decreased more signifi cantly after treatment in the PE+CVVHDF and PE+HP+CVVHDF groups(P<0.01). Prothrombin time(PT) and albumin were signifi cantly improved only in the PE+CVVHDF and PE+HP+CVVHDF groups(P<0.05). TBIL decreased more significantly in the PE+HP+CVVHDF group than in the HP+CVVHDF and PE+CVVHDF groups(P<0.05). The survival rate of the patients was 58.1%(18/31),viral survival rate 36.4%(4/11),and non-viral survival rate 70%(14/20).CONCLUSION:Liver function was relatively improved after treatment,but PE+HP+CVVHDF was more efficient for the removal of toxic metabolites,especially bilirubin. The survival rate was signifi cantly higher in the patients with non-viral liver failure than in those with viral liver failure.

关键词： Severe acute liver failure Artificial liver Plasma exchange Hemoperfusion Continuous veno-venous hemodiafi ltration