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Enhancing work hardening and ductility in additively manufacturedβTi:roles played by grain orientation,morphology and substructure

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Journal of Materials Science & Technology 2022年第10期105卷 131-141页

作者： Ahmad Zafari edward Wen Chiek Lui Mogeng Li Kenong Xia Department of Mechanical Engineering The University of MelbourneVictoria 3010Australia Centre for Additive Manufacturing School of EngineeringRMIT UniversityMelbourneVIC 3000Australia Physics of Fluids Group Max Planck Center for Complex Fluid DynamicsJ.M.Burgers Center for Fluid Dynamics and MESA+Research InstituteDepartment of Science and TechnologyUniversity of Twente7500AE Enschedethe Netherlands

A metastableβTi alloy was additively manufactured by laser powder bed fusion(LPBF).Tensile testing along the build direction of the as-LPBF material(LPBF-0°)revealed signifcant work softening immediately following yielding with no uniform *** contrast,substantial work hardening and uniform elongation well over 10%were achieved perpendicular to the build direction(LPBF-90°).Similar effects were obtained in the build direction after super transus heat treatment(LPBF-0°+HT)although the strength was slightly *** addition,the yield drop phenomenon observed in both orientations of the as-LPBF materials disappeared after *** enhanced work hardening ability,and thus ductility,can be attributed to increased interactions of slip bands/slip bands owing to additional{112}slip systems becoming operative in LPBF-0°+HT and LPBF-90°while LPBF-0°was dominated by{110}*** other variations after HT may be related to the coarsening of grain structure and removal of specifc substructures in the as-LPBF microstructure.

关键词： βtitanium Work hardening Anisotropy Equiaxed microstructure Slip band Laser powder bed fusion

Cardiovascular disease and male sexual dysfunction

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Asian Journal of Andrology 2015年第1期17卷 3-4,I0006页

作者： Martin Miner edward D Kim Miriam Hospital Men's Health Center Warren Alpert School of Medicine Brown University Providence RI USA Department of Surgery Division of Urology University of Tennessee Graduate School of Medicine Knoxville Tennessee 37920 USA

Erectile dysfunction （ED） is a form of sexual dysfunction that is estimated to affect 〉 30% of men between the ages of 40 and 70. As a result of an improved understanding about the pathophysiology of ED and improved treatment options, an increasing number of men are presenting for evaluation than several decades ago. In fact, many of these men are visiting their health care professional for the first time with ED as their primary complaint. Most of these men are unaware of the link between ED and cardiovascular disease （CVD）.

关键词：性功能障碍心血管疾病男性勃起功能障碍病理生理医疗保健 CVD

Prospect Evaluation of Low-GWP Refrigerants R1233zd(E)and R1336mzz(Z)Used in Solar-Driven Ejector-Vapor Compression Hybrid Refrigeration System

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Journal of Thermal Science 2021年第5期30卷 1572-1580页

作者： WANG Xuehui YAN Yuying WRIGHT edward HAO Xinyue GAO Neng Fluids and Thermal Engineering Research Group Faculty of EngineeringUniversity of NottinghamNottinghamNG72RDUK Ningbo Institute of Technology Zhejiang UniversityNingbo315100China Research Centre for Fluids and Thermal Engineering University of Nottingham Ningbo ChinaNingbo315100China

In this paper,the entrainment ratio,pump work,heat loads of heat exchangers and COPthermal were theoretically evaluated for a solar-driven ejector-vapor compression hybrid refrigeration system with R1233zd(E)and R1336mzz(Z)as the working *** evaluation of the utilization potentials of R1233zd(E)and R1336mzz(Z)was presented by comparing the system performance with that of R245fa,a commonly used refrigerant in the ejector *** results indicated that the systems with R1233zd(E)and R1336mzz(Z)had a higher entrainment ratio and lower pump *** pump works when using R1233zd(E)and R1336mzz(Z)can be up to 14.59%and 38.05%lower than those of R245fa,***,the system showed the highest COPthermal utilizing R1233zd(E)followed by that of R245fa,with the R1336mzz(Z)system having the lowest *** differences between R1233zd(E)and R1336mzz(Z)systems,R1233zd(E)and R245fa systems were 4.33%and 2.0%,*** paper was expected to provide a good reference for the utilizing prospect of R1233zd(E)and R1336mzz(Z)in ejector refrigeration systems.

关键词： low GWP alternative refrigerants ejector R1233zd(E) R1336mzz(Z)

Endoscopic diagnosis and treatment of gastric dysplasia and early cancer:Current evidence and what the future may hold

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World Journal of Gastroenterology 2021年第31期27卷 5126-5151页

作者： edward Young Hamish Philpott Rajvinder Singh Department of Gastroenterology Lyell McEwin HospitalElizabeth Vale 5112SAAustralia Faculty of Health and Medical Sciences University of AdelaideAdelaide 5000SAAustralia

Gastric cancer accounts for a significant proportion of worldwide cancer-related morbidity and *** well documented precancerous cascade provides an opportunity for clinicians to detect and treat gastric cancers at an endoscopically curable *** high prevalence regions such as Japan and Korea,this has led to the implementation of population screening ***,guidelines remain ambiguous in lower prevalence *** recent years,there have been many advances in the endoscopic diagnosis and treatment of early gastric cancer and precancerous *** advanced endoscopic imaging has led to improved detection and characterization of gastric lesions as well as superior accuracy for delineation of margins prior to *** addition,promising early data on artificial intelligence in gastroscopy suggests a future role for this technology in maximizing the yield of advanced endoscopic *** on endoscopic resection(ER)are particularly robust in Japan and Korea,with high rates of curative ER and markedly reduced procedural ***,there is a shortage of data in other regions to support the applicability of protocols from these high prevalence *** advances in endoscopic therapeutics will likely lead to further expansion of the current indications for ER,as both technology and proceduralist expertise continue to grow.

关键词： Gastric cancer Endoscopy Endoscopic imaging Endoscopic mucosal resection Endoscopic submucosal dissection

Combinations of Estimation of Distribution Algorithms and Other Techniques

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International Journal of Automation and computing 2007年第3期4卷 273-280页

作者： Qingfu Zhang Jianyong Sun edward Tsang Department of Computer Science University of EssexWivenhoe ParkColchester CO4 3SQUK School of Computer Science University of BirminghamBirmingham B15 2TTUK

This paper summaries our recent work on combining estimation of distribution algorithms （EDA） and other techniques for solving hard search and optimization problems： a） guided mutation, an offspring generator in which the ideas from EDAs and genetic algorithms are combined together, we have shown that an evolutionary algorithm with guided mutation outperforms the best GA for the maximum clique problem, b） evolutionary algorithms refining a heuristic, we advocate a strategy for solving a hard optimization problem with complicated data structure, and c） combination of two different local search techniques and EDA for numerical global optimization problems, its basic idea is that not all the new generated points are needed to be improved by an expensive local search.

关键词： Estimation distribution algorithm guided mutation memetic algorithms global optimization.

Azoospermia:vasal agenesis

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Asian Journal of Andrology 2022年第1期24卷 1-4页

作者： J Sam Fisher edward D Kim Department of Urology University of TennesseeKnoxvilleTN 37920USA

SPECIFIC GENETIC TESTS(CFTR AND INTRON 8 SPLICE VARIANT TESTING)AND THEIR SIGNIFICANCE Congenital bilateral absence of the vas deferens(CBAVD)and cystic fibrosis(CF)began as separate entities with an apparent clinical *** occurs in 1%–2%of men presenting with infertility at urological departments and has an incidence of 1:1000–1:2000 in Caucasian *** example of this anatomic variant is shown in Figure 1.

关键词： correlation. clinical Figure

Recycling of waste glass as aggregate in cement-based materials

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Environmental Science and Ecotechnology 2020年第4期4卷 39-46页

作者： edward Harrison Aydin Berenjian Mostafa Seifan School of Engineering Faculty of Science and EngineeringThe University of WaikatoHamiltonNew Zealand

Glass is a common material made from natural resources such as *** much of the waste glass is recycled to make new glass products,a large proportion is still being sent to *** is a useful resource that is non-biodegradable,occupying valuable landfill *** combat the waste glass that is heading to landfill,alternative recycling forms need to be *** construction industry is one of the largest CO_(2) emitters in the world,producing up to 8% of the global CO_(2) to produce *** use of sand largely depletes natural resources for the creation of mortars or *** review explores the possibilities of incorporating waste glass into cement-based *** was found waste glass is unsuitable as a raw material replacement to produce clinker and as a coarse aggregate,due to a liquid state being produced in the kiln and the smooth surface area,*** results were found when incorporating fine particles of glass in cement-based materials due to the favourable pozzolanic reaction which benefits the mechanical *** was found that 20% of cement can be replaced with waste glass of 20 mm without detrimental effects on the mechanical *** higher than 30% can cause negative impacts as insufficient amounts of CaCO_(3) remain to react with the silica from the glass,known as the dilution *** the fine aggregate replacement for waste glass increases over 20%,the mechanical properties decrease proportionally;however,up to 20% has similar results to traditionally mixes.

关键词： Waste glass Fine aggregate Sand replacement Pozzolanic reactivity Cement Recycling alternative

ANALYSIS AND IMPROVEMENT OF LEAD TIME FOR JOB SHOP UNDER MIXED PRODUCTION SYSTEM

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Chinese Journal of Mechanical Engineering 2006年第4期19卷 487-491页

作者： CHE Jianguo HE Zhen edward M Knod Department of Industrial Engineering Tianjin University Tianjin 300072 China Department of Management Western Illinois University Macomb 61466 USA

Firstly an overview of the potential impact on work-in-process （WIP） and lead time is provided when transfer lot sizes are undifferentiated from processing lot sizes. Simple performance examples are compared to those from a shop with one-piece transfer lots. Next, a mathematical programming model for minimizing lead time in the mixed-model job shop is presented, in which one-piece transfer lots are used. Key factors affecting lead time are found by analyzing the sum of the longest setup time of individual items among the shared processes （SLST） and the longest processing time of individual items among processes （LPT）. And lead time can be minimized by cutting down the SLST and LPT. Reduction of the SLST is described as a traveling salesman problem （TSP）, and the minimum of the SLST is solved through job shop scheduling. Removing the bottleneck and leveling the production line optimize the LPT. If the number of items produced is small, the routings are relatively short, and items and facilities are changed infrequently, the optimal schedule will remain valid. Finally a brief example serves to illustrate the method.

关键词： Lead time Work-in-process(WIP) Mixed production system Job shop scheduling problem Traveling salesman problem(TSP)

Hazards from lakes and reservoirs: new interpretation of the Vaiont disaster

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Journal of Mountain Science 2022年第6期19卷 1717-1737页

作者： Alan P.DYKES edward N.BROMHEAD Centre for Engineering Environment and Society ResearchSchool of Engineering and the EnvironmentKingston UniversityPenrhyn RoadKingston upon ThamesKTi 2EEUK

Hazards in reservoirs and lakes arising from subaerial landslides causing impact waves(or ‘lake tsunamis’) are now well known, with several recent examples having been investigated in detail. The potential scale of such hazards was not widely known at the time of the Vaiont dam project in the 1950s and early 1960s, although a small wave triggered by a landslide at another new reservoir nearby in the Dolomites(northern Italy) drew the possible hazard to the attention of the Vaiont project’s managers. The Vaiont disaster in 1963 arose from a combination of disparate and seemingly unrelated factors and circumstances that led to an occurrence that could not have been imagined at that time. The ultimate cause was a very large landslide moving very rapidly into a reservoir and displacing the water. The resulting wave overtopped the dam to a height of around 175 m and around 2000 people were killed. This paper identifies and examines all of the issues surrounding the Vaiont dam and landslide in order to identify causal factors, contributory factors(including aggravating factors) and underlying factors. In doing so, it demonstrates that the disaster arose from the Vaiont dam project and cannot be attributed simply to the landslide. Underlying geological factors gave rise to the high speed of the landslide, which would have occurred anyway at some time. However, without the contributory factors that account for the presence of the reservoir, i.e. the choice of location for the project and management of the project with respect to a possible landslide hazard, there would have been no disaster. Indeed, the disaster could have been avoided if the reservoir could have been emptied pending further ground investigations. Understanding of this case provides many lessons for future dam projects in mountainous locations but also highlights an ongoing and perhaps under-appreciated risk from similar events involving other water bodies including geologically recent lakes formed behind n

关键词： Vaiont landslide Impulse wave Lake tsunami Dam project Causal factors for disaster