检索结果-南通市图书馆

维普期刊数据库

Do community responses influence OSS contributor retention? A survival analysis

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第8期67卷 331-333页

作者： Zhe WANG zhixing li Yue YU School of Public Policy and Management Tsinghua University College of Computer National University of Defense Technology

Open source software(OSS) projects usually employ a community-based model, where geographically distributed developers from around the world collaborate online [1].With the rise of social coding sites like Git Hub, contributing to OSS projects has become easier and more accessible, motivating many developers to join the OSS community [2]. The continued submission of high-quality contributions from these community developers has led to numerous corrections, improvements, and innovations in many successful OSS projects [1, 2].

关键词：

Kinetics of the direct reaction between ozone and phenol by high-gravity intensified heterogeneous catalytic ozonation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2023年第1期53卷 317-323页

作者： Kechang Gao Shengjuan Shao zhixing li Jiaxin Jing Weizhou Jiao Youzhi liu Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering North University of ChinaTaiyuan 030051China

In this study,high-gravity intensified heterogeneous catalytic ozonation is utilized for treatment of phenol-containing wastewater,and the kinetics of the direct reaction between ozone and phenol in the presence of excess tertiary butanol(TBA)is investigated.It is revealed that the direct reaction between ozone and phenol in the rotating packed bed(RPB)follows the pseudo-first-order kinetics with a reaction rate constant higher than that in the conventional bubbling reactor(BR).Under different conditions of temperature,initial pH,high-gravity factor,and gaseous ozone concentration,the apparent reaction rate constant varies in the range of 0.0160–0.115 min-1.An empirical power-exponential model is established to characterize the effects of these parameters on the direct reaction between ozone and phenol by high-gravity intensified heterogeneous catalytic ozonation.

关键词： High-gravity technique Heterogeneous catalysis Ozone Phenol Kinetics of the direct reaction

维普期刊数据库

High-gravity intensified iron-carbon micro-electrolysis for degradation of dinitrotoluene

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2022年第11期16卷 1595-1605页

作者： Jiaxin Jing Weizhou Jiao zhixing li Kechang Gao Jingwen Zhang Gaomiao Ren Youzhi liu Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering North University of ChinaTaiyuan 030051China

The application of iron–carbon(Fe–C)micro-electrolysis to wastewater treatment is limited by the passivation potential of the Fe–C packing.In order to address this problem,high-gravity intensified Fe–C micro-electrolysis was proposed in this study for degradation of dinitrotoluene wastewater in a rotating packed bed(RPB)using commercial Fe–C particles as the packing.The effects of reaction time,high-gravity factor,liquid flow rate and initial solution pH were investigated.The degradation intermediates were determined by gas chromatography-mass spectrometry,and the possible degradation pathways of nitro compounds by Fe–C micro-electrolysis in RPB were also proposed.It is found that under optimal conditions,the removal rate of nitro compounds reaches 68.4%at 100 min.The removal rate is maintained at approximately 68%after 4 cycles in RPB,but it is decreased substantially from 57.9%to 36.8%in a stirred tank reactor.This is because RPB can increase the specific surface area and the renewal of the liquid–solid interface,and as a result the degradation efficiency of Fe–C micro-electrolysis is improved and the active sites on the Fe–C surface can be regenerated for continuous use.In conclusion,high-gravity intensified Fe–C micro-electrolysis can weaken the passivation of Fe–C particles and extend their service life.

关键词： high-gravity technology rotating packed bed Fe–C micro-electrolysis dinitrotoluene wastewater active sites

HAF: a hybrid annotation framework based on expert knowledge and learning technique

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2022年第1期65卷 276-278页

作者： zhixing li Yue YU Tao WANG Gang YIN Xinjun MAO Huaimin WANG Key Laboratory of Parallel and Distributed Computing National University of Defense Technology College of Computer National University of Defense Technology

Dear editor,The increasing awareness of the potential value hidden in data has resulted in many data mining studies being conducted. In the domain of software engineering, for example, developers' behavioral data and code review data have been leveraged in social coding sites to automatically recommend relevant projects [1] and candidate reviewers [2, 3].

关键词： PULL-BASED DEVELOPMENT RECOMMENDATION

Different patterns of association between white matter microstructure and plasma unsaturated fatty acids in those with high risk for psychosis and healthy participants

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

General Psychiatry 2022年第2期35卷 109-118页

作者： Wenjun Su zhixing li lihua Xu Jiahui Zeng Yingying Tang Xiaochen Tang Yanyan Wei Qian Guo Tianhong Zhang Jijun Wang Shanghai Key Laboratory of Psychotic Disorders Shanghai Mental Heaith Center Shanghai Jiao Tong University School of MedicineShanghaiChina CAS Center for Excellence in Brain Science and Intelligence Technology(CEBSIT) Chinese Academy of ScienceShanghaiChina Institute of Psychology and Behavioral Science Shanghai Jiao Tong UniversityShanghaiChina

Background Disrupted white matter(WM)microstructure has been commonly identified in youth at clinical high risk(CHR)for psychosis.Several lines of evidence suggest that fatty acids,especially unsaturated fatty acids(UFAs),might play a crucial role in the WM pathology of early onset psychosis.However,evidence linking UFA and WM microstructure in CHR is quite sparse.Aims We investigated the relationship between the plasma UFA level and WM microstructure in CHR participants and healthy controls(HC).Methods Plasma fatty acids were assessed and diffusion tensor imaging(DTI)data were performed with tract-based spatial statistics(TBSS)analysis for 66 individuals at CHR for psychosis and 70 HC.Results Both the global and regional diffusion measures showed significant between-group differences,with decreased fractional anisotropy(FA)but increased mean diffusivity(MD)and radial diffusivity(RD)found in the CHR group compared with the HC group.On top of that,we found that in the HC group,plasma arachidic acid showed obvious trend-level associations with higher global FA,lower global MD and lower global RD,which regionally spread over the corpus callosum,right anterior and superior corona radiata,bilateral anterior and posterior limb of the internal capsule,and bilateral superior longitudinal fasciculus.However,there were no associations between global WM measures and any UFA in the CHR group.Conversely,we even found negative associations between arachidic acid levels and regional FA values in the right superior longitudinal fasciculus and right retrolenticular part of the internal capsule in the CHR group.Conclusions Compared with the HC group,CHR subjects exhibited a different pattern of association between WM microstructure and plasma UFA,with a neuroprotective effect found in the HC group but not in the CHR group.Such discrepancy could be due to the excessively upregulated UFAs accumulated in the plasma of the CHR group,highlighting the role of balanced plasma-membrane fatty acids homeostasis in WM development.

关键词： unsaturated diffusion linking

When and How to Adjust Non-Pharmacological Interventions Concurrent with Booster Vaccinations Against COVID-19—Guangdong,China,2022

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China CDC weekly 2022年第10期4卷 199-206,I0002-I0012页

作者： Guanhao He Fangfang Zeng Jianpeng Xiao Jianguo Zhao Tao liu Jianxiong Hu Sicong Zhang Ziqiang lin Huaiping Zhu Dan liu Min Kang Haojie Zhong Yan li limei Sun Yuwei Yang zhixing li Zuhua Rong Weilin Zeng Xing li Zhihua Zhu Xiaofeng liang Wenjun Ma Guangdong Provincial Center for Disease Control and Prevention Guangzhou CityGuangdong ProvinceChina Department of Public Health and Preventive Medicine School of MedicineJinan UniversityGuangzhou CityGuangdong ProvinceChina Disease Control and Prevention Institute Jinan UniversityGuangzhou CityGuangdong ProvinceChina Guangdong Provincial Institute of Public Health Guangdong Provincial Center for Disease Control and PreventionGuangzhou CityGuangdong ProvinceChina BNU-HKBU United International College Zhuhai CityGuangdong ProvinceChina Department of Psychiatry School of MedicineNew York UniversityNew York CityNew YorkUnites States Laboratory of Mathematical Parallel Systems(LAMPS) Department of Mathematics and StatisticsYork UniversityToronto CityOntarioCanada Jinan University-BioKangtai Vaccine Institute Jinan UniversityGuangzhou CityGuangdong ProvinceChina

Introduction:With the large-scale roll-out of the coronavirus disease 2019(COVID-19)booster vaccination effort(a vaccine dose given 6 months after completing primary vaccination)in China,we explore when and how China could lift non-pharmacological interventions(NPIs)against COVID-19 in 2022.Methods:Using a modified susceptible-infectiousrecovered(SIR)mathematical model,we projected the COVID-19 epidemic situation and required medical resources in Guangdong Province,China.Results:If the number of people entering from overseas recovers to 20%of the number in 2019,the epidemic in 2022 could be controlled at a low level by a containment(215 local cases)or suppression strategy(1,397 local cases).A mitigation strategy would lead to 21,722 local cases.A coexistence strategy would lead to a large epidemic with 6,850,083 local cases that would overwhelm Guangdong’s medical system.With 50%or 100%recovery of the 2019 level of travelers from overseas,the epidemic could also be controlled with containment or suppression,but enormous resources,including more hotel rooms for border quarantine,will be required.However,coexistence would lead to an uncontrollable epidemic with 12,922,032 local cases.Discussion:With booster vaccinations,the number of travelers from overseas could increase slightly in 2022,but a suppression strategy would need to be maintained to ensure a controllable epidemic.

关键词： maintained Guangdong overseas

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

纳米纤维素基湿度响应智能器件的研究进展

复合材料学报 2024年第5期41卷 2294-2307页

作者：沈湘凌陈广杰李知行郭大亮李静童欣浙江科技学院环境与资源学院杭州310023 陕西科技大学教育部轻化工助剂化学与技术重点实验室西安710021 陕西科技大学陕西省轻化工助剂化学与技术协同创新中心西安710021

纳米纤维素来源广泛、绿色可再生,作为纤维素衍生材料,由于其特殊的结构特性,使其具有高机械强度、高结晶度、大比表面积等特点。基于纳米纤维素的湿度响应智能器件因其丰富的亲水基团(例如羟基和羧基)而显示出出色的响应性能,因此纳米... 详细信息

纳米纤维素来源广泛、绿色可再生,作为纤维素衍生材料,由于其特殊的结构特性,使其具有高机械强度、高结晶度、大比表面积等特点。基于纳米纤维素的湿度响应智能器件因其丰富的亲水基团(例如羟基和羧基)而显示出出色的响应性能,因此纳米纤维素可以作为一种湿度敏感材料来制备高性能湿度响应智能器件。本文介绍了纳米纤维素的分类、来源及湿度响应智能器件的分类及响应原理,重点阐述了不同纳米纤维素在湿度响应智能器件方面的制备及应用,总结了不同类型纳米纤维素与导电材料复合的湿度响应智能器件的性能及优缺点,最后对纳米纤维素基湿度响应智能器件的研究应用存在的问题与挑战进行归纳总结,以期为纳米纤维素基复合材料在湿度响应智能器件中的发展提供理论支持。

关键词：纳米纤维素湿度响应传感器致动器柔性复合材料

维普期刊数据库

D-BERT: Incorporating dependency-based attention into BERT for relation extraction

在线全文

学校读者我要写书评

暂无评论

CAAI Transactions on Intelligence Technology 2021年第4期6卷 417-425页

作者： Yuan Huang zhixing li Wei Deng Guoyin Wang Zhimin lin Chongqing Key Laboratory of Computational Intelligence Chongqing University of Posts and TelecommunicationsChongqingChina Centet of Statistical Research Southwestern Univetsity of Finance and EconomicsChengduChina

Relation extraction between entity pairs is an increasingly critical area in natural language processing.Recently the pre-trained bidirectional encoder representation from transformer(BERT)performs excellendy on the text classification or sequence labelling tasks.Here,the high-level syntactic features that consider the dependency between each word and the target entities into the pre-trained language models are incorporated.Our model also utilizes the intermediate layers of BERT to acquire different levels of semantic information and designs multi-granularity features for final relation classification.Our model offers a momentous improvement over the published methods for the relation extraction on the widely used data sets.

关键词： BERT relation processing.

Correlation-based software search by leveraging software term database

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2018年第5期12卷 923-938页

作者： zhixing li Gang YIN Tao WANG Yang ZHANG Yue YU Huaimin WANG National Laboratory for Parallel and Distributed Processing College of Computer National University of Defense Technology Changsha 410073 China

Internet-scale open source software （OSS） pro- duction in various communities generates abundant reusable resources for software developers. However, finding the de- sired and mature software with keyword queries from a considerable number of candidates, especially for the fresher, is a significant challenge because current search services often fail to understand the semantics of user queries. In this paper, we construct a software term database （STDB） by analyzing tagging data in Stack Overflow and propose a correlationbased software search （CBSS） approach that performs correlation retrieval based on the term relevance obtained from STDB. In addition, we design a novel ranking method to optimize the initial retrieval result. We explore four research questions in four experiments, respectively, to evaluate the effectiveness of the STDB and investigate the performance of the CBSS. The experiment results show that the proposed CBSS can effectively respond to keyword-based software searches and significantly outperforms other existing search services at finding mature software.

关键词： software retrieval software term database open source software