检索结果-南通市图书馆

Pareto optimization of WEDM process parameters for machining a NiTi shape memory alloy using a combined approach of RSM and heat transfer search algorithm

引用

Advances in Manufacturing 2021年第1期9卷 64-80页

作者： Rakesh Chaudhari jay j.vora S.S.Mani Prabu I.A.Palani Vivek K.Patel D.M.Parikh Department of Mechanical Engineering School of TechnologyPandit Deendayal Petroleum UniversityRaisanGandhinagar 382007India Metallurgy Engineering and Materials Science Indian Institute of Technology IndoreIndore 453552India Discipline of Mechanical Engineering Indian Institute of Technology IndoreIndore 453552India Department of Industrial Engineering School of TechnologyPandit Deendayal Petroleum UniversityRaisanGandhinagar 382007India

Machining of shape memory alloys(SMAs)without losing the shape memory effect could immensely extend their ***,the wire electric discharge machining process was used to machine NiTi—a shape memory *** experimental methodology was designed using a Box-Behnken design approach of the response surface *** effects of input variables including pulse on time,pulse off time,and current were investigated on the material removal rate,surface roughness,and *** tests were performed to check the robustness of the generated empirical *** of the process parameters was performed using a newly formulated,highly efficient heat transfer search *** tests were conducted and extended for analyzing the retention of the shape memory effect of the machined surface by differential scanning *** addition,2D and 3D Pareto curves were generated that indicated the trade-offs between the selected output variables during the simultaneous output variables using the multi-objective heat transfer search *** optimization route yielded encouraging *** objective optimization yielded a maximum material removal rate of 1.49 mm^(3)/s,maximum microhardness 462.52 HVN,and minimum surface roughness 0.11μ*** Pareto curves showed conflicting effects during the wire electric discharge machining of the shape memory alloy and presented a set of optimal non-dominant *** shape memory alloy machined using the optimized process parameters even indicated a shape memory effect similar to that of the starting base material.

关键词： Shape memory alloy(SMA) Nitinol Wire electrical discharge machining(WEDM) Heat transfer search algorithm Differential scanning calorimetry(DSC)test Shape memory effect

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Epidemiologic investigation of pediatric distal humerus fractures: An American insurance claims database study

引用

World journal of Orthopedics 2024年第1期15卷 52-60页

作者： Kyle jay Klahs jake E Dertinger Grant T Mello Kevin Thapa Alexis B Sandler E'Stephan j jesus Garcia Nata Parnes Department of Orthopaedic Surgery Texas Tech University Health Sciences-El PasoEl PasoTX 79905United States Medical School California Health Sciences University College of Osteopathic MedicineClovisCA 93611United States Undergraduate School Binghampton UniversityVestalNY 13902United States Department of Orthopaedic Surgery William Beaumont Army Medical CenterFort BlissTX 79918United States Department of Orthopaedic Surgery Carthage Area HospitalCarthageNY 13619United States

BACKGROUND Distal humerus elbow fractures are one of the most common traumatic fractures seen in pediatric patients and present as three main types:Supracondylar(SC),lateral condyle(LC),and medial epicondyle(ME)*** To evaluate the epidemiology of pediatric distal humerus fractures(SC,LC,and ME)from an American insurance claims *** A retrospective review was performed on patients 17 years and younger with the ICD 9 and 10 codes for SC,LC and ME fractures based on the IBM Truven MarketScan®Commercial and IBM Truven MarketScan Medicare Supplemental *** from 2015 to 2020 were queried for treatments,patient age,sex,length of hospitalization,and *** A total of 1133 SC,154 LC,and 124 ME fractures were *** fractures had the highest percentage of operation at 83%,followed by LC(78%)and ME fractures(41%).Male patients were,on average,older than female patients for both SC and ME *** In the insurance claims databases used,SC fractures were the most reported,followed by LC fractures,and finally ME *** was identified to be a factor for how a pediatric distal humerus fractures,with patients with SC and LC fractures being younger than those with ME *** peak age per injury per sex was similar to reported historic central tendencies,despite reported trends for younger physiologic development.

关键词： Supracondylar humerus fracture Lateral condyle fracture Medial epicondyle fracture Pediatric elbow Truven Epidemiology

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Message from the Guest Editors of the Special Issue on Precise Orbit Determination

引用

Astrodynamics 2024年第3期8卷 323-323页

作者： Xiyun Hou jay W.McMahon School of Astronomy and Space Science Nanjing UniversityNanjingChina Ann and H.j.Smead Department of Aerospace Engineering Sciences the University of Colorado BoulderBoulderColorado 80309USA

Dear authors and readers,Orbit determination is an old topic in celestial mechanics and *** originates from the need to determine the position and speed of natural or artificial objects in space through ground-station measurements,along with the need to estimate parameters involved in dynamics and *** has been the key to many important space applications.

关键词： dynamics. observations. Orbit

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Storylines of family medicine Ⅸ:people and places—diverse populations and locations of care

引用

Family Medicine and Community Health 2024年第S3期12卷 79-88页

作者： William B Ventres Leslie A Stone Emad R Abou-Arab julio Meza David S Buck jerome W Crowder jennifer Y C Edgoose Alexander Brown Ellen j Plumb Amber K Norris jay j Allen Lauren E Giammar john E Wood Scott M Dickson G Austin Brown Family and Preventive Medicine University of Arkansas for Medical Sciences College of MedicineLittle RockArkansasUSA Family Medicine University of Michigan Medical SchoolAnn ArborMichiganUSA Family Medicine University of California Los AngelesDavid Geffen School of MedicineLos AngelesCaliforniaUSA Community Medicine University of HoustonTilman J Fertitta Family College of MedicineHoustonTexasUSA Social and Behavioral Sciences University of HoustonTilman J Fertitta Family College of MedicineHoustonTexasUSA Family Medicine and Community Health University of Wisconsin-Madison School of Medicine and Public HealthMadisonWisconsinUSA NH Dartmouth Family Medicine Residency ConcordNew HampshireUSA San Francisco VA Medical Center San FranciscoCaliforniaUSA Duluth Family Medicine Residency Program University of Minnesota Medical School Duluth CampusDuluthMinnesotaUSA UAMS Northeast Regional Campus Family Medicine Residency Program JonesboroArkansasUSA Cascades East Family Medicine Residency Program Oregon Health&Science University School of MedicineKlamath FallsOregonUSA

Storylines of Family Medicine is a 12-part series of thematically linked mini-essays with accompanying illustrations that explore the many dimensions of family medicine as interpreted by individual family physicians and medical educators in the USA and elsewhere around the ***‘Ⅸ:people and places—diverse populations and locations of care’,authors address the following themes:‘LGBTQIA+health in family medicine’,‘A family medicine approach to substance use disorders’,‘Shameless medicine for people experiencing homelessness’,“Difficult”encounters—finding the person behind the patient’,‘Attending to patients with medically unexplained symptoms’,‘Making house calls and home visits’,‘Family physicians in the procedure room’,‘Robust rural family medicine’and‘Full-spectrum family medicine’.May readers appreciate the breadth of family medicine in these essays.

关键词： illustration family dimensions

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Optimisation of zeolite LTA synthesis from alum sludge and the influence of the sludge source

引用

journal of Environmental Sciences 2021年第1期33卷 130-142页

作者： Alexandra Rozhkovskaya jay Rajapakse Graeme j.Millar School of Civil and Enuironmental Engineering Science and Engineering FacultyQueensland University oTechnologyBrisbaneQueensland 4000Australia Institute for Future Environments and School of Mechanical Medical and Process EngineeringQueensland Uniuersity of TechnologyBrisbaneQueensland 4000Australia

Generation of alum sludge(AS)at drinking water treatment plants represents an environmental liability and adds to the cost of water ***,this study explored the feasibility of using low and high carbon containing alum sludge from two water treatment plants to synthesize zeolite *** hypothesis was that zeolite LTA synthesis was dependant upon alum sludge source and that a range of strategies may be required to optimize zeolite *** characteristics such as morphology,phase composition,crystallinity,and particle size distribution were recorded."One pot"hydrothermal synthesis of precursor gel with molar composition 4.2 Na2O:Al2O3:1.2 SiO_(2):168 H2O at 80℃ for 3 hr resulted in 25 and 46 wt.%zeolite LTA from high and low carbonaceous sludge,*** to hydrothermal reaction stage it was discovered that ageing of the gel,addition of zeolite LTA seeds,ultrasonic treatment and calcination all promoted zeolite LTA *** of the alum sludge at 700℃ for 2 hr before hydrothermal synthesis resulted in particle size reduction and the highest amount of crystalline zeolite LTA:79 wt.%from low carbon sludge and 65 wt.%from high carbon ***,the zeolite crystallinity reported in this study was the higher than previous studies on this *** outlined approach may allow value adding of alum waste and produce a commodity which could be used locally by the water treatment plant as a water softener.

关键词： Alum sludge Zeolite LTA Ultrasonic Ageing Waste conversion

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

Effect of struvite and organic acids on immobilization of copper and zinc in contaminated bio-retention filter media

引用

journal of Environmental Sciences 2020年第11期32卷 35-44页

作者： Chathurani Moragaspitiya jay Rajapakse Graeme j.Millar Science and Engineering Faculty Queensland University of Technology(QUT)Queensland 4000Australia

Few studies have been carried out to connect nutrient recovery as struvite from wastewater and sustainable utilization of the recovered struvite for copper and zinc immobilization in contaminated *** study revealed the effect of struvite on Cu and Zn immobilization in contaminated bio-retention soil in the presence of commonly exuded plant organic *** research hypothesis was that the presence of both struvite and organic acids may influence the immobilization of Cu and Zn in *** outcome of this research confirmed that more than 99%of Cu and Zn was immobilized in bio-retention filter media by struvite ***-soluble Cu and Zn concentrations of struvite treated soil were less than 1.83 and 0.86 mg/kg respectively,and these concentrations were significantly lower compared to the total Cu and Zn content of 747.05 mg/kg in the contaminated *** of struvite to Cu-and Zn-contaminated soil resulted in formation of compounds similar to zinc phosphate tetrahydrate(Zn3(PO4)2·4H2O)and amorphous Cu and Zn *** was effective in heavy metal remediation in acidic soil regardless of the presence of Ca impurities in struvite and the presence of plant organic acids in ***,this study revealed that struvite recovered from wastewater treatment plants has potential for use as an amendment for heavy metal remediation in contaminated bio-retention soil.

关键词： Immobilization Struvite Organic acids Heavy metal Contaminated soil Bio-retention

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

Effect of Ca:Mg ratio and high ammoniacal nitrogen on characteristics of struvite precipitated from waste activated sludge digester effluent

引用

journal of Environmental Sciences 2019年第12期31卷 65-77页

作者： Chathurani Moragaspitiya jay Rajapakse Graeme j.Millar Science and Engineering Faculty Queensland University of Technology (QUT)

This study revealed the relationship between the presence of calcium impurities and ammoniacal nitrogen concentration upon crystallization of *** research hypothesis was that the presence of both calcium and high concentrations of ammoniacal nitrogen(328–1000 mg/L)in waste activated sludge may influence the struvite quality and acid ***,we studied the impact of Ca:Mg ratio upon morphology,particle size,purity and dissolution of struvite,in the presence of varying levels of excess ammoniacal nitrogen.X-ray diffraction revealed that up to 31.4%amorphous material was made which was assigned to *** the ammoniacal nitrogen concentration and elevation of the Mg:Ca ratio maximized the presence of *** particle size was also increased by ammoniacal nitrogen as was twinning of the *** with dilute solutions of organic acid revealed the sensitivity of struvite dissolution to the physical characteristics of the *** particles(21.2μm)dissolved at higher rates than larger particles(35.86μm).However,struvite dissolved rapidly as the p H was further reduced irrespective of the physical ***,addition of struvite to low p H soils was not viewed as beneficial in terms of controlled nutrient ***,this study revealed that waste activated sludge effluent with high ammoniacal nitrogen was prospective for synthesis of high quality struvite material.

关键词： Struvite Purity Calcium Ammoniacal nitrogen Waste activated sludge

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

Efficient degradation of tetracycline by singlet oxygen-dominated peroxymonosulfate activation with magnetic nitrogen-doped porous carbon

引用

journal of Environmental Sciences 2022年第5期34卷 330-340页

作者： Shaohua Wu Chunping Yang Yan Lin jay j.Cheng Guangdong Provincial Key Laboratory of Petrochemcial Pollution Processes and Control School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyMaomingGuangdong 525000China College of Environmental Science and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control(Hunan University)Ministry of EducationChangshaHunan 410082China Maoming Engineering Research Center for Organic Pollution Control Academy of Environmental and Resource SciencesGuangdong University of Petrochemical TechnologyMaomingGuangdong 525000China Hunan Provincial Environmental Protection Engineering Center for Organic Pollution Control of Urban Water and Wastewater ChangshaHunan 410001China Department of Biological and Agricultural Engineering North Carolina State UniversityRaleighNC 27695USA

Nonradical reaction driven by peroxymonosulfate(PMS)based advanced oxidation pro-cesses has drawn widespread attention in water treatment due to their inherent advantages,but the degradation behavior and mechanism of organic pollutants are still *** this study,the performance,intermediates,mechanism and toxicity of tetracycline(TC)degra-dation were thoroughly examined in the constructed magnetic nitrogen-doped porous car-bon/peroxymonosulfate(Co-N/C-PMS)*** results showed that 85.4%of TC could be removed within 15 min when Co-N/C and PMS was simultaneously added and the degra-dation rate was enhanced by 3.4 and 14.7 folds compared with Co-N/C or PMS alone,***,the performance of Co-N/C was superior to that of most previously reported *** lines of evidence indicated that Co-N/C-PMS system was a singlet oxygen-dominated nonradical reaction,which was less interfered by pH and water compo-nents,and displayed high adaptability to actual water ***,the degrada-tion process was elaborated on the basis of three-dimensional excitation-emission matrix spectra and liquid chromatography-mass *** last,the toxicity of treated TC was greatly reduced by using microalgae Coelastrella *** ecological *** study provides a promising approach based on singlet oxygen-dominated nonradical reaction for eliminating TC in water treatment.

关键词： Tetracycline Peroxymonosulfate Activation Singlet oxygen Toxicity

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

Systematic approaches to improving the performance of polyoxometalates in non-aqueous redox flow batteries

引用

journal of Energy Chemistry 2020年第11期29卷 115-124页

作者： Yuan Cao jee-jay j.Chen Mark A.Barteau Department of Chemical Engineering University of MichiganAnn ArborMI 48109United States Applied Materials 14J Fuller RoadAlbanyNY 12203United States Department of Chemical Engineering and Department of Chemistry Texas A&M UniversityCollege StationTX 77843United States

Polyoxometalates have been explored as multi-electron active species in both aqueous and non-aqueous redox flow batteries. Although non-aqueous systems in principle offer a wider voltage window for redox flow battery operation, realization of this potential requires a judicious choice of solvent as well as polyoxometalate properties. We demonstrate here the superior performance of N,N-dimethylformamide(DMF)compared to acetonitrile as a solvent for redox flow batteries based on Li3PMo12O40. This compound displays two 1-electron transfers in acetonitrile but can access an extra quasi-reversible 2-electron redox process in DMF. A cell containing 10 mM solution of Li3PMo12O40 in DMF produced a cell voltage of 0.7 V with 2-electron transfers(State of Charge = 60%) and showed a good cyclability. As a means to boost energy density, operation of the redox flow battery at a higher concentration of 0.1 M Li3PMo12O40 produced cells with cell voltage of 0.6 V in acetonitrile and a cell voltage of 1.0 V in DMF;both showed excellent coulombic efficiencies of more than 90% over the course of 30 cycles. Energy density was also increased by employing an asymmetric cell with different polyoxometalates on each side to extend cell ***6P2W18O62 exhibited 3 quasi-reversible 2-electron transfers in the potential range between-2.05 V and-0.5 V vs. Ag/Ag+. 10 mM Li6P2W18O62/Li3PMo12O40 in DMF produced a cell with cell voltage of 1.3 V involving 4-electron transfers(State of Charge = 50%) with coulombic efficiency of nearly 100% and energy efficiency of nearly 70% throughout the test with more than 20 cycles. These promising results demonstrate proof-of-concept approaches to improving the performance of polyoxometalates in non-aqueous redox flow batteries.

关键词： Polyoxometalate Energy density Redox flow battery Non-aqueous battery Cyclic voltammetry Bulk electrolysis

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

“How Do We Actually Do Convergence”for Disaster Resilience?Cases from Australia and the United States

引用

International journal of Disaster Risk Science 2021年第3期12卷 299-311页

作者： Shefali juneja Lakhina Elaina j.Sutley jay Wilson Wonder Labs San JoseCA 95128USA Civil Environmental and Architectural EngineeringUniversity of KansasLawrenceKS 66045USA Clackamas County Disaster Management Oregon CityOR 97045USA

In recent years there has been an increasing emphasis on achieving convergence in disaster research,policy,and programs to reduce disaster losses and enhance social ***,there remain considerable gaps in understanding"how do we actually do convergence?"In this article,we present three case studies from across geographies—New South Wales in Australia,and North Carolina and Oregon in the United States;and sectors of work—community,environmental,and urban resilience,to critically examine what convergence entails and how it can enable diverse disciplines,people,and institutions to reduce vulnerability to systemic risks in the twenty-first *** identify key successes,challenges,and barriers to *** build on current discussions around the need for convergence research to be problem-focused and solutions-based,by also considering the need to approach convergence as ethic,method,and *** reflect on how convergence can be approached as an ethic that motivates a higher order alignment on"why"we come together;as a method that foregrounds"how"we come together in inclusive ways;and as an outcome that highlights"what"must be done to successfully translate research findings into the policy and public domains.

关键词： Convergence research Disaster resilience Disaster risk reduction Research ethics

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：