检索结果-南通市图书馆

Photocatalytic defluorination of perfluorooctanoic acid by surface defective BiOCl:Fast microwave solvothermal synthesis and photocatalytic mechanisms

引用

Journal of Environmental Sciences 2019年第10期31卷 69-79页

作者： Yuanyuan Sun guiying Li Wanjun Wang wenquan gu Po Keung Wong Taicheng An guangzhou Key Laboratory Environmental Catalysis and Pollution Control Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control School of Environmental Science and Engineering Institute of Environmental Health and Pollution Control Guangdong University of Technology Guangzhou 510006 China School of Life Sciences The Chinese University of Hong Kong Shatin New Territories Hong Kong China

There is an urgent need for developing cost-effective methods for the treatment of perfluorooctanoic acid(PFOA)due to its global emergence and potential *** this study,taking surface-defective BiOCl as an example,a strategy of surface oxygen vacancy modulation was used to promote the photocatalytic defluorination efficiency of PFOA under simulated sunlight *** defective BiOCl was fabricated by a fast microwave solvothermal method,which was found to induce more surface oxygen vacancies than conventional solvothermal and precipitation *** a result,the asprepared BiOCl showed significantly enhanced defluorination efficiency,which was 2.7 and33.8 times higher than that of BiOCl fabricated by conventional solvothermal and precipitation methods,*** studies indicated that the defluorination of PFOA follows a direct hole(h^+)oxidation pathway with the aid of·OH,while the oxygen vacancies not only promote charge separation but also facilitate the intimate contact between the photocatalyst surface and PFOA by coordinating with its terminal carboxylate group in a bidentate or bridging *** work will provide a general strategy of oxygen vacancy modulation by microwave-assisted methods for efficient photocatalytic defluorination of PFOA in the environment using sunlight as the energy source.

关键词： Photocatalysis Perfluorooctanoic acid Oxygen vacancy Microwave method BiOCl

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Ozone generation enhanced by silica catalyst in packed-bed DBD reactor

引用

Plasma Science and Technology 2021年第8期23卷 89-94页

作者： Xin ZENG Yafang ZHANG Liangyin guO wenquan gu Ping YUAN Linsheng WEI School of Resources Environmental&Chemical Engineering Nanchang UniversityNanchang 330031People's Republic of China

In this paper,three dielectric barrier discharge(DBD)configurations,which were plain DBD with no packing,DBD with packed pure quartz fibers and DBD with packed loaded quartz fibers,were employed to investigate the effect and catalytic mechanism of catalyst materials in a packed-bed ozone *** the experimental results,it was clear that the DBD configuration with packed pure fibers and packed loaded fibers promotes ozone *** the packed-bed reactor,ozone concentration and ozone yield were enhanced by an increase of electric field in the discharge gap with the packed-bed ***,the enhancement of ozone concentration and yield for the DBD reactor packed by loaded fibers with silica nanoparticles was due to the catalysis of silica nanoparticles on the fiber *** adsorption of silica nanoparticles on the fiber surface can prolong the retention time of active species and enhance surface reactions.

关键词： DBD ozone generation packed-bed reactor silica catalysis surface reaction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Improvement of Set Pair Analysis Evaluation Method and Its Application on Urban Water Security

Improvement of Set Pair Analysis Evaluation Method and Its A...

引用

2011 International Symposium on Water Resource and Environmental Protection(ISWREP 2011)

作者： Fengshun Yang Dongguo Shao Chun Xiao Xuezhi Tan wenquan gu Kui Wang State Key Laboratory of Water Resources ＆ Hydropower Engineering Science Wuhan University

ISBN: (纸本)9781612843377

With regard to the defect of low accuracy to describe problems by ordinary set pair analysis （SPA） evaluation method because of its strategy to divide state space,an improved method that expands three-member connection degree to more-member degree was proposed in this *** identification criterion with confidence level and term of score was also implemented in proposed *** this method,if the connection degree had been get,all banks and scores of all samples were ordered according to their scores,which make assessment results more easily to be *** comparing the superiority of other methods that are used to determine weights in the past,combination weighting method was proposed and applied to determine corresponding *** proposed method overcomes the defects of using the same weight or determining weights with one *** Wuhan city as a case,this proposed method was applied to evaluate urban water *** assessment results were corresponded to results obtained by comprehensive evaluation method and fuzzy matter-element evaluation *** results also indicated that this improved method was more accurate than ordinary SPA evaluation method.

关键词： set pair analysis identification criterion combination weighting method urban water security connection degree

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Stent-assisted coiling of intracranial carotid ophthalmic segment aneurysm segment aneurysms:Long-term follow-up from a single center

引用

Journal of Interventional Medicine 2023年第3期6卷 116-120页

作者： wenquan gu Geng Zhou Aizada Aldiyarova Tengyue Liu Yi Zhang Weidong Liu Lingping Meng Binxian gu MingHua Li Ming Su Chen Su Aihua Liu Wu Wang Department of Radiology Shanghai Punan HospitalShanghai200125China Department of Interventional Neuroradiology Beijing Tiantan HospitalCapital Medical UniversityBeijing100050China Chemotherapy Department Multidisciplinary Medical Center of the Akimat of AstanaAstana010009Kazakhstan Department of Orthopaedics The Second Hospital of Jilin UniversityChangchunJilin130041China Department of Interventional Radiology&Vascular Surgery Zhongda HospitalMedical SchoolSoutheast UniversityNanjing210000China Department of Radiology Shanghai Sixth People's Hospital Jinshan BranchShanghai201599China Department of Diagnostic and Interventional Radiology Shanghai Jiao Tong University Affiliated Sixth People's HospitalShanghai200233China Shandong Academy of Traditional Chinese Medicine 7 Yanzishan West RoadJinanShandong250014China Department of Oncology Jinan Central HospitalCentral Hospital Affiliated to Shandong First Medical UniversityNo.105Jie Fang RoadJinan250013ShandongChina

Background:To evaluate the efficacy of stent-assisted coiling(SAC)for the treatment of carotid ophthalmic segment aneurysm segment aneurysms(OSAs)of the internal carotid artery(ICA)through detailed long-term follow-up of a large patient ***:We retrospectively analyzed 88 consecutive patients with OSAs between January 2009 and January 2020 at our *** results were evaluated using the modified Raymond grading system and clinical outcomes were evaluated using the mRS *** primary endpoints were major aneurysm recurrence and poor clinical outcomes for at least 18 months of *** patients were asked to attend clinical follow-up assessments and possibly undergo DSA or MR via ***:We enrolled 88 patients with 99 OSAs treated with coiling,of whom 76 were treated with *** coiling procedures were successful in all 88 ***,complications occurred in 8 patients(9.1%).No procedure-related mortality was observed.67(76.1%)experienced immediate aneurysm occlusion at the end of the ***-term angiographic follow-up(18 months)was available in 45/88 aneurysms(51%)(average 18.7±5.2 months).Four patients continued their follow-up for 5 years after initial aneurysm *** a clinical follow-up time of 28.7 months(range,12-51 months),85 patients(95.5%)achieved favorable clinical outcomes(mRS scores of 0-2).Conclusions:This study indicates that SAC treatment is a safe and effective therapeutic alternative for ruptured and unruptured *** procedural risks are low with relatively long-term effectiveness.

关键词： Endovascular treatment Stent-assisted coiling C6 segment aneurysm Occlusion rate Long-term follow-up

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Microwave-assisted synthesis of defective tungsten trioxide for photocatalytic bacterial inactivation:Role of the oxygen vacancy

引用

Chinese Journal of Catalysis 2020年第10期41卷 1488-1497页

作者： wenquan gu Wanjun Wang guiying Li Haojing Xiea Po Keung Wong Taicheng An guangzhou Key Laboratory Environmental Catalysis and Pollution Control Guangdong Key Laboratory of Environmental Catalysis and Health Risk ControlSchool o f Environmental Science and EngineeringInstitute o f Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006GuangdongChina School of Life Sciences The Chinese University of Hong KongShatinNTHong KongChina

Surface defect modulation has emerged as a potential strategy for promoting the photocatalytic activity of photocatalysts for various applications, while the impact of the oxygen vacancy on bacterial inactivation is still debated. In this study, oxygen vacancies were introduced to tungsten trioxide nanosheets(WO3–x) via a microwave-assisted route. The as-prepared WO3–x nanosheets exhibited excellent visible-light-driven photocatalytic activity toward E. coli K-12 inactivation, and 6 log orders of the bacterial cells could be completely inactivated within 150 min. The obtained bacterial inactivation rate constant was 15.2 times higher than that of pristine WO3 without oxygen vacancies, suggesting that the surface oxygen vacancy could significantly promote the bacterial inactivation efficiency. The mechanism study indicated that the inactivation of bacterial cells occurs via a direct h+ oxidation pathway. In addition, the role of the oxygen vacancy was studied in detail;the oxygen vacancy was found to not only promote interfacial charge separation but also tune the band structure of WO3, thereby leading to increased h+ oxidation power. Finally, a possible oxygen vacancy-dominated photocatalytic bacterial inactivation mechanism is proposed. This work is expected to offer new insights into the microwave-assisted synthesis of defective photocatalysts and the use of the oxygen vacancy for promoting photocatalytic antibacterial activities.

关键词： Photocatalysis WO3 Microwave Oxygen vacancy Bacterial inactivation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Application of three-dimensional printing in interventional medicine

引用

Journal of Interventional Medicine 2020年第1期3卷 1-16页

作者： Geng Zhou Weidong Liu Yi Zhang wenquan gu Minghua Li Chuan Lu Ran Zhou Yichen Che Haitao Lu Yueqi Zhu Gaojun Teng Yongde Cheng Center of Interventional Radiology&Vascular Surgery Department of Radiology Zhongda HospitalMedical SchoolSoutheast UniversityNanjing210000China Shanghai Punan Hospital International Medical Department Shanghai200125China Department of Radiology Shanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai200233China School of Radiology Taishan Medical CollegeShandong271016China Department of Ultrasonography Zaozhuang Mining Group Central HospitalZaozhuangShandong277800China Department of Ultrasonography Maternity&Child Health Hospital of Mudan DistrictHezeShandong274000China Department of Radiology No.85 Hospital of PLAShanghai200052China

Introduction In recent years,three-dimensional printing(3DP),an additive manufacturing process,has gained widespread clinical application,and 3DP has been considered as the third industrial revolution.1 In its early introduction in the 1980s,3DP served as a software-controlled technology that converted computer-aided-design(CAD)data into a physical object via a single *** depositing multiple two-dimensional cross-sections one above the other,3DP can now be used to build arbitrarily complex geometries and patient-specific constructs using the patient’s imaging *** date,computed tomography has been the main imaging data source for 3DP owing to its excellent spatial ***,current 3D printers have enabled bedside on-demand fabrication of medical products in *** materials including polymers,ceramics,biomaterials,and metals have been developed for such applications over the last few *** fields that employ 3DP technologies have also expanded,such as tissue engineering,regenerative medicine,pharmaceutics,and medical models and devices.2 The market for additive manufacturing is expected to surpass$20 billion in the global industry by the end of the 2020.3 Although the use of 3DP technology in interventional medicine is still relatively new,advancements are occurring within this discipline at a rapid *** 3DP technologies,materials,and clinical applications relevant to the interventional field are discussed in this article.

关键词： printer printing additive

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

区域需水量多维随机模拟方法

引用

农业工程学报 2011年第9期27卷 170-174页

作者：顾文权邵东国武汉大学水资源与水电工程科学国家重点实验室武汉430072

需水模拟是水资源规划与管理的重要基础。采用Cholesky因子分解与Box-Cox数据变换及Monte-Carlo随机模拟等技术相结合的方法,建立了考虑月需水量相关性的区域需水量长系列多维随机模拟模型,并将模型应用于汉江中下游地区,结果表明,模拟... 详细信息

需水模拟是水资源规划与管理的重要基础。采用Cholesky因子分解与Box-Cox数据变换及Monte-Carlo随机模拟等技术相结合的方法,建立了考虑月需水量相关性的区域需水量长系列多维随机模拟模型,并将模型应用于汉江中下游地区,结果表明,模拟需水序列的均值、方差等统计参数相对误差小,同时能表达各月需水量之间的相关关系。所建立的模型为需水模拟提供了新思路,具有一定的适用性。

关键词：灌溉水管理随机模型需水量多维随机模拟

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于供求关系和生产函数的灌区水量使用权交易模型

引用

水利学报 2017年第1期48卷 61-69页

作者：邵东国吴振顾文权陈述武汉大学水资源与水电工程科学国家重点实验室湖北武汉430072

随着市场在资源配置中的作用日益重要,水权交易对优化水资源配置、提高用水效率、促进节水势在必行,现已成为我国最严格水资源管理制度试点建设的重要内容之一。本文运用水资源系统分析与经济学理论,建立了基于供求关系和生产函数的灌... 详细信息

随着市场在资源配置中的作用日益重要,水权交易对优化水资源配置、提高用水效率、促进节水势在必行,现已成为我国最严格水资源管理制度试点建设的重要内容之一。本文运用水资源系统分析与经济学理论,建立了基于供求关系和生产函数的灌区水量使用权交易模型,该模型以交易双方各自收益最大化为目标,由C-D生产函数和供求关系确定水资源价值,以纳什均衡价格和供需水量为约束确定交易水量和交易收益。经湖北省高关水库灌区与应城市水量使用交易应用研究,结果表明:高关水库灌区随着节水深入,2013年现状、2020、2030规划水平年在50%平水年交易水量最大,分别为3 744.78万m3、4 743.51万m3、5 829.13万m3;75%、85%干旱年交易水量分别减少到1 225.28万m3~4 180.79万m3,213.65万m3~1 570.17万m3;90%特旱年则不具备交易条件。通过双方交易,可使应城市2013、2020、2030水平年50%平水年缺水情况明显缓解,75%和85%干旱年缺水率降低;还可提高高关水库灌区净收益201.73万元~7 0541.97万元,应城市净收益88.37万元~131 669.00万元。但要根本解决应城市干旱缺水问题,需要建立灌区节水量交易收益补偿投入机制,调动节水积极性,充分挖掘当地节水潜力。这对建立健全我国水权交易机制和最严格的水资源管理制度,提高水资源利用效益与效率,指导节水型社会建设,保障城乡供水安全,具有重要意义。

关键词：灌区水量使用权交易模型生产函数供求关系

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

南方丘陵区多层土壤结构水平和垂向渗流特征试验与模拟研究

引用

水利学报 2017年第7期48卷 799-807页

作者：邵东国杨霞徐保利顾文权武汉大学水资源与水电工程科学国家重点实验室湖北武汉430072

南方丘陵地区地形起伏,上下游田块及田块内部不同层之间土壤质地差异较大,存在复杂的水分转化关系。为揭示该地区田块内多层土壤水分运动规律,在湖北省漳河水库灌区团林灌溉试验站,开展田块变化水层条件下水分通过犁底层垂直入渗以及通... 详细信息

南方丘陵地区地形起伏,上下游田块及田块内部不同层之间土壤质地差异较大,存在复杂的水分转化关系。为揭示该地区田块内多层土壤水分运动规律,在湖北省漳河水库灌区团林灌溉试验站,开展田块变化水层条件下水分通过犁底层垂直入渗以及通过耕作层侧向入渗试验,观测土壤累积入渗量及各层含水率的变化过程;建立基于HYDRUS-2D的土壤水分二维渗流模拟模型。经验证,模型模拟值和田间实测值基本吻合;试验发现由于土壤性质差异,田块犁底层的存在会抑制水流的垂直运动,减少深层渗漏,但同时增强了水流沿耕作层侧向运动的能力。试验期间,水分沿犁底层平均垂向入渗速率为0.094 cm/min,沿耕作层平均侧向入渗速率为0.138 cm/min;入渗稳定后,渗漏水量占田面累积入渗量的21.11%,其中垂直渗漏水量占0.46%,侧向渗漏水量占20.65%,耕作层侧向渗漏水量占侧向渗漏水量的81.06%。结果表明,土壤侧向渗漏对水量损失的贡献较大,控制田块渗漏特别是耕作层侧向渗漏对南方地区节水减排具有十分重要作用。

关键词：南方丘陵区多层土壤土壤含水率累积入渗量侧向渗漏 HYDRUS-2D

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

球形传声器阵列三维波束形成性能

引用

农业工程学报 2012年第12期28卷 80-85页

作者：肖淳邵东国杨丰顺顾文权武汉大学水资源与水电工程科学国家重点实验室武汉430072

为分析球形阵列结构参数对三维波束形成声源识别性能的影响,基于延迟求和波束形成理论,仿真分析了主瓣宽度和最大旁瓣水平随阵列直径的变化规律,结果表明：在传声器布置形式一致的情况下,直径越大,阵列空间分辨率越好,但对旁瓣抑制能力... 详细信息

为分析球形阵列结构参数对三维波束形成声源识别性能的影响,基于延迟求和波束形成理论,仿真分析了主瓣宽度和最大旁瓣水平随阵列直径的变化规律,结果表明：在传声器布置形式一致的情况下,直径越大,阵列空间分辨率越好,但对旁瓣抑制能力越弱;模拟计算了5种典型球形阵列的阵列模式径向投影及最大旁瓣水平,结果显示：传声器均匀分布球形阵列的性能最好,在50～100rad/m的波数范围内,最大旁瓣水平约为-12dB,在波数高达220rad/m时最大旁瓣水平也低于-6dB。提高球形阵列传声器分布的均匀程度和密集程度能显著提高阵列性能。

关键词：传声器阵列波束形成声学成像性能分析

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：