检索结果-南通市图书馆

基于乡镇水环境治理工程多元目标的智慧管理思路探讨

在线全文

学校读者我要写书评

暂无评论

工程建设与设计 2024年第17期 241-244页

作者：韩卫强汪聪田亚军北京市市政工程设计研究总院有限公司北京100082

东部某城市开展A流域水环境综合治理,为实现对A流域水环境治理工程智慧化的管理和控制,落实水务设施的精细化管理,运用物联网、移动互联网、大数据、云计算、人工智能等先进技术,构建了具备信息处理、项目监管、资产维护、效果评估、应... 详细信息

东部某城市开展A流域水环境综合治理,为实现对A流域水环境治理工程智慧化的管理和控制,落实水务设施的精细化管理,运用物联网、移动互联网、大数据、云计算、人工智能等先进技术,构建了具备信息处理、项目监管、资产维护、效果评估、应急指挥、联合调度等功能的智慧管控平台。平台实施后,将全面提升乡镇流域分散型水务设施运营管理水平和服务水平,为保障水务设施的安全稳定运行提供现代智慧化管理手段,并为设施的高效运行与安全保障提供“互联网+”新型水务管理模式。

关键词：乡镇分散型水务设施水环境治理智慧管理

Effect of Nitrogen and Hydrogen on the Crystallization of Nanocrystalline Silicon Nitrogen Films

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1997年第9期14卷 682-685页

作者： han wei-qiang han Gao-rong FAN Shou-shan GU Bing-lin Department of Materials Zhejiang UniversityHangzhou 310027 Department of Physics Tsinghua UniversityBeijing 100084

Hydrogenated nanocrystalline silicon nitrogen(nc-SiN_(x):H)films were prepared by rf glow discharge of gas mixture of silane(SiH_(4))and nitrogen(N_(2))diluted heavily by hydrogen(H_(2)).The effect of the gas volume ratios X_(g) of(SiU_(4)+N_(2))/H_(2) and X_(N)of N_(2)/SiH_(4) on the crystallization and composition of films is *** growth process and crystallization mechanism of nc-SiN_(x):H films are discussed in detail.

关键词： crystallization diluted

Extreme precipitation detection ability of four high-resolution precipitation product datasets in hilly area:a case study in Nepal

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Climate Change Research 2024年第3期15卷 390-405页

作者： Sunil Subba Yao-Ming Ma wei-qiang Ma Cun-Bo han Land-Atmosphere Interaction and its Climatic Effects Group State Key Laboratory of Tibetan Plateau Earth SystemEnvironment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China College of Atmospheric Science Lanzhou UniversityLanzhou 730000China National Observation and Research Station for Qomolongma Special Atmospheric Processes and Environmental Changes Dingri 858200China Kathmandu Center of Research and Education Chinese Academy of SciencesBeijing 100101China China-Pakistan Joint Research Center on Earth Sciences Chinese Academy of SciencesIslamabad 45320Pakista

Given Nepal's vulnerability to extreme precipitation(EP),it is imperative to conduct a comprehensive analysis to comprehend the historical trends of such ***,acquiring precise precipitation data for EP remains challenging in mountainous countries like Nepal owing to the scarcity of densely gauged *** limitation impedes the dissemination of knowledge pertaining to EP variability events in *** current research on this topic is deficient for two main reasons:1)there is a lack of studies leveraging recently released high-resolution precipitation products to identify their EP detection capabilities,which further hinders the usability of those products in data-scarce regions like Nepal,and 2)most studies have focused on the characterisation of EP events in Nepal rather than their spatial and temporal *** address these issues,this study evaluated the EP detection capabilities of four high-resolution precipitation product datasets(PPDs)across Nepal from 1985 to *** datasets include the ERA5 Land reanalysis data,satellite-based precipitation data(PERSIANN_CCS_CDR and CHIRPS_V2.0)and a merged dataset(TPHiPr).We used various statistical and categorical indices to assess their ability to capture the spatial and temporal variability of EP *** annual EP events were characterised by 11 indices divided into frequency and intensity *** TPHiPr merged dataset offered a robust depiction of monthly precipitation estimates,achieving the highest critical success index,accuracy,probability of detection and a low false alarm ratio for daily precipitation detection of 0.1 mm in ***,the PERSIANN_CCS_CDR dataset exhibited poor *** PPDs showed increasing trends in EP ***,the TPHiPr dataset showcased those trends with fewer errors and stronger correlations for many frequency(R10mm,R20mm and R25mm)and intensity(RX1day,RX5day,PRCPTOT and R99p)*** results indicate that TPHiPr outperformed ot

关键词： Extreme precipitation Precipitation product Nepal TPHiPr ERA5 land PERSIANN_CCS_CDR CHIRPS_V2.0

Mössbauer Study of Catalytically Grown Carbon Nanotube

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 1998年第1期15卷 68-69页

作者： LI Qun-qing FAN Shou-shan han wei-qiang GAO Nai-fei WANG Xin-rong Department of Physics Center of Atomic and Molecular SciencesTsinghua UniversityBeijing 100084

The valence states of iron in iron catalysts,hydrogen reduced catalysts,and catalytically grown carbon nanotubes are determined by Mössbauer spectra,*** results show that the iron exists as Fe,FeO,andα-Fe_(2)O_(3) in hydrogen reduced catalysts,whereas it exists as Fe-C alloy,FeO,and α-Fe_(2)O_(3) in the catalysts encapsulated in carbon *** is postulated that Fe in hydrogen reduced catalysts plays the main role in the formation of catalytically grown carbon nanotube.

关键词： ssbauer Catalytic carbon

Neurilemmoma of a seminal vesicle

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Medical Journal 2007年第15期120卷 1383-1384页

作者： han Ping wei qiang YANG Yu-ru Department of Urology West China Hospital Sichuan University Chengdu 610041 China

Neurilemmoma, also named Schwannoma, is usually a benign tumour composed of Schwann cells. It is commonly located in the retroperitoneum, mediastinum, head and neck, and is rarely seen in the genitourinary organs. Onl... 详细信息

关键词： neurilemmoma seminal vesicle

Single droplet formation by controlling the viscoelasticity of polymer solutions during inkjet printing

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第6期35卷 244-248页

作者： Dong Lv Xuelei Liu wei Li qiang Zhang Xinhong Yu Yanchun han State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China

Inkjet printing has emerged as a potential solution processing method for large-area patterned *** inkjet printing,a single droplet without satellite droplet is required for high-quality ***,we propose a strategy for obtaining a single droplet by adjusting the reduced concentration(c/c^(*),where c^(*)is the critical overlap concentration)in the range of *** formation can be categorized into three distinct regimes:(1)c/c^(*)2.0,no ***,an inertial-capillary balance led to the 2/3-power scaling of the minimum radius with time for the solutions of c/c^(*)weissenberg number was higher than the critical value of 0.5,indicating that the polymer chains underwent coil-stretch *** viscoelastic-capillary balance dominated instead of the inertial-capillary *** resulting viscoelastic resistance reduced the length of the ligament and increased the velocity difference between the satellite and main ***,a single droplet was *** addition,the law can be successfully generalized to various molecular weights,molecular structures and solvents.

关键词： Inkjet printing Single droplet Satellite droplet Viscoelasticity Coil-stretch

Energy saving analysis for CO_(2)–O_(2)mixed injection technology in converter steelmaking

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2024年第5期31卷 1095-1103页

作者： Bao-chen han Chun-liang Gao Ya-qiang Li Dan Liu Guang-sheng wei Rong Zhu Hebei Key Laboratory of Material Near-Net Forming Technology School of Material Science and EngineeringHebei University of Science and TechnologyShijiazhuang050018HebeiChina Department of Automotive Engineering Hebei Vocational University of Technology and EngineeringXingtai054000HebeiChina School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China

Energy-saving in China's iron and steel industry still relies on the development and improvement of short-term energy saving ***,a special converter smelting technology incorporating energy saving was *** evaluate the energy-saving potential of the CO_(2)–O_(2)mixed injection(COMI)technology,collected production data were used to develop an improved techno-economic *** reveal that the technology can save energy through auxiliary material consumption,sensible heat of solid by-product,iron loss reduction,and energy *** application of COMI technology in an enterprise is cost effective,involving the energy saving potential of 0.206 GJ/t,the cost of conserved energy of−48.83 yuan/GJ,and a simple payback period of 0.35 year for a 60-million-yuan *** analysis shows that the investment cost and discount rate primarily influence the cost of conserved energy of the *** the discount rate increased,the cost of conserved energy also gradually ***,the COMI technology is an energy-saving technology with good development prospects.

关键词： Converter steelmaking COMI technology Energy saving Techno-economic model Investment cost

New insights into the deposition of natural gas hydrate on pipeline surfaces:A molecular dynamics simulation study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum Science 2024年第1期21卷 694-704页

作者： Jun Zhang Hai-qiang Fu Mu-Zhi Guo Zhao Wang Li-Wen Li Qi Yin You-Guo Yan wei wei wei-Feng han Jie Zhong School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina Department of Alternative Energy PetroChina Research Institute of Petroleum Exploration&DevelopmentLangfang 065007HebeiChina

Natural gas hydrate(NGH)can cause pipeline blockages during the transportation of oil and gas under high pressures and low *** hydrate adhesion on pipelines is viewed as an efficient way to prevent NGH *** studies suggested the water film can greatly increase hydrate adhesion in gas-dominant ***,by performing the molecular dynamics simulations,we find in water-dominant system,the water film plays different roles in hydrate deposition on Fe and its corrosion ***,due to the strong affinity of water on Fe surface,the deposited hydrate cannot convert the adsorbed water into hydrate,thus,a water film *** water affinities decrease(Fe>Fe_(2)O_(3)>FeO>Fe_(3)O_(4)),adsorbed water would convert to amorphous hydrate on Fe_(2)O_(3)and form the ordered hydrate on FeO and Fe_(3)O_(4)after hydrate *** absorbed water film converts to amorphous or to hydrate,the adhesion strength of hydrate continuously increases(Fehanisms on Fe and its corrosion surfaces and suggest hydrate deposition can be adjusted by changing water affinities on pipeline surfaces.

关键词： Deposition Natural gas hydrate Pipelines Water affinity Adhesion strength

Recent Advances in Pd-Catalyzed Reactions Involving the “On-Water” Mechanism

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2024年第5期42卷 533-542页

作者： Dong wei Guo-qiang Lin State Key Laboratory of Systems Medicine for Cancer Shanghai Cancer InstituteShanghai Key Laboratory of Systems Regulation and Clinical Translation for CancerRen Ji HospitalShanghai Jiao Tong University School of MedicineShanghai200127 China State Key Laboratory of Chemical Biology Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai200032 China

As the chemical industry grapples with the need for more eco-friendly practices,the use of water as a reaction medium is gaining attraction in organic *** mini-review delves into Pd-catalyzed reactions that utilize the "on-water" mechanism,spanning from 2019 to late *** reactions are neatly categorized into several types: (A) Catalytic C—H activations,(B) Mizoroki- Heck-type reactions,(C) Suzuki-Miyaura reactions,and (D) Cyclization *** showcasing the potential of water as a sustainable reaction medium for organic transformations,these reactions leave no doubt about the importance of embracing eco-friendly practices in the chemical *** Scientists In 1980,a seminal work by Breslow et *** an acceleration of reaction rate in the Diels-Alder *** and co-workers noted a significant increase in the rate of the [2σ+2σ+2π] cycloaddition of quadricyclane and dimethyl azodicarboxylate (DMAD) when the reaction was conducted in water,as opposed to when it was carried out in organic *** term "on-water" was then coined to describe this *** strategy was further expanded to transition-metal catalyzed transformations by Ackermann in ***,Varma and Leazer disclosed a Pd-catalyzed Mizoroki-Heck type arylation of alkenes with diaryliodonium salts “on-water”.The enantioselective version of "on-water" process was not realized until 2014 by the Zhou *** on,the Schaub group described a Pd-catalyzed Suzuki–Miyaura coupling reaction of electron-poor aryl chlorides with water,using only 50 ppm of catalyst *** recently,Liu and Lin extended the "on-water" strategy to Pd-catalyzed double Mizoroki-Heck *** mini-review has focused on Pd-catalyzed reactions involving the “on-water” mechanism.

关键词： Pd-catalyzed “On-water” Green chemistry Aqueous reactions Mechanism Methodology and reactions Mizoroki-Heck reaction Cross-coupling