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Numerical Simulation of Temperature Field In the Grinding hardening

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Numerical Simulation of Temperature Field In the Grinding Ha...

Changing Chinese diets to Achieve a Win-Win Solution for health and the environment

The 9th International Symposium on Advances in Abrasive Technology

作者： G.C. Wang, B.L. Wang ,J.d. Liu and z. Wang School of Mechanical engineering, Jiangsu University, zhenjiang, China

Grinding hardening is a compound processing method in which the heat generated in the grinding zone and the mechanical action is used to heat-treat the workpiece surface to have a martensite transformation. It achieves a same performance with the surface heat treatments. In this paper a mode has been built of the grinding hardening temperature field based on the finite element method (FeM) with the Galerkin method. And the triangle Jaeger heat source mode has been used to calculate the workpiece's temperature field with the ANSyS finite element analysis software. Based on the results of the FeM, the thickness of the grinding hardening layer has been predicted. Finally, the experimental data are compared with stimulated data to test the reliability of the latter.

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China & World economy 2021年第6期29卷 34-52页

作者： Fangfang Sheng Jingjing Wang Kevin z.Chen Shenggen Fan haixiu Gao Institute of Agricultural economics and development Chinese Academy of Agricultural SciencesChina Academy of Global Food economics and policy China Agricultural UniversityChina China Academy for Rural development Zhejiang UniversityChina International Food policy Research Institute(IFpRI) USA

diets are key determinants of nutrition and health and play a significant role in the *** this article,we aim to(i)describe dietary transitions and health in China and the consequent environmental challenges;(ii)identify differences between current Chinese diets and healthy reference diets;(iii)conduct a systematic review assessing the health impacts of four reference diets on the Chinese population,and(iv)simulate changes in greenhouse gas emissions under different diet *** results show differences between the Chinese diets and reference diets,with the current Chinese diet including mainly grains(especially refined rice),excessive meat consumption,and insufficient consumption of fruit and *** all Chinese consumers adopt one of the healthy reference diets all the time,the incidence of diet-related chronic disease and mortality would be significantly *** dietary shifts would also reduce greenhouse gas emissions by 146-202 million tons(18-25 percent)compared with the projected emissions level in 2030.

关键词： dietary transition healthy diets greenhouse gas emissions nutrition and health

The research group of Guoquan Liu revealed that photodynamic therapy drove a distinct ferroptosis-like cell death pathway in tumor cells

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Journal of Chinese pharmaceutical Sciences 2021年第7期30卷 617-618页

作者： Shui S. zhao z. Wang h. Conrad M. Liu G. 北京大学药学院天然药物及仿生药物国家重点实验室

近日,北京大学药学院天然药物及仿生药物国家重点实验室的刘国全团队在国际"氧化还原生物学与医学协会(Sf RBM)"的官方期刊《Redox Biology》在线发表了题为"Non-enzymatic lipid peroxidation initiated by photodynamic therapy drive... 详细信息

近日,北京大学药学院天然药物及仿生药物国家重点实验室的刘国全团队在国际"氧化还原生物学与医学协会(Sf RBM)"的官方期刊《Redox Biology》在线发表了题为"Non-enzymatic lipid peroxidation initiated by photodynamic therapy drives a distinct ferroptosis-like cell death pathway"的研究工作。

关键词：光动力疗法北京大学药学院细胞死亡 death 氧化还原

Ion-acoustic wave structures in the fluid ions modeled by higher dimensional generalized Korteweg-de Vries-zakharov-Kuznetsov equation

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Journal of Ocean engineering and Science 2023年第6期8卷 623-635页

作者： U.younas J.Ren Muhammad z.Baber Muhammad W.yasin T.Shahzad State Key Laboratory of power Grid environmental protection/henan Academy of Big data Zhengzhou UniversityZhengzhou 450001China department of Mathematics and Statistics The University of LahoreLahorePakistan department of mathematics University of NarowalNarowalPakistn department of Basic Sciences and humanities Narowal CampusUniversity of Engineering and Technology Lahore 54890Pakistan

In this paper,the higher dimensional generalized Korteweg-de-Varies-zakharov-Kuznetsov(gKdV-zK)equation is under *** model is used in the field of plasma physics which describes the effects of magnetic field on the weak ion-acoustic *** have applied two techniques,called asφ^(6)-model expansion method and the hirota bilinear method(hBM)to explore the diversity of wave *** solutions are expressed in the form of hyperbolic,periodic and Jacobi elliptic function(JeF)***,the solitary wave solutions are also extracted.A comparison of our results to well-known results is made,and the study concludes that the solutions achieved here are ***,3-dimensional and contour profiles of achieved outcomes are drawn in order to study their dynamics as a function of parameter *** the basis of the obtained results,we can assert that the pro-posed computational methods are straightforward,dynamic,and well-organized,and will be useful for solving more complicated nonlinear problems in a variety of fields,particularly in nonlinear sciences,in conjunction with symbolic ***,our discoveries provide an important milestone in comprehending the structure and physical behavior of complex *** hope that our findings will contribute significantly to our understanding of ocean *** study,we hope,is appropriate and will be of significance to a broad range of experts involved in ocean engineering models.

关键词： Wave solutions gKdV-zK equation Bilinear transformation φ^(6)-model expansion method

激光剥蚀信号在线平滑和去汞装置:原位微区铅同位素准确分析利器

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矿物岩石地球化学通报 2015年第4期34卷 848-848页

作者： hu z zhang W Liu y Gao S Li M zong K Chen h hu S 刘勇胜

激光原位微区分析可在微观尺度上完成样品的元素定量分析或同位素组成测定,为研究成岩、成矿物质来源和追踪地壳与地幔演化历史提供了独特的观察视野。但是,激光剥蚀等离子体质谱的一些缺陷阻碍了地质样品的高精度、高空间分辨率分析,... 详细信息

激光原位微区分析可在微观尺度上完成样品的元素定量分析或同位素组成测定,为研究成岩、成矿物质来源和追踪地壳与地幔演化历史提供了独特的观察视野。但是,激光剥蚀等离子体质谱的一些缺陷阻碍了地质样品的高精度、高空间分辨率分析,比如：剥蚀池的位置效应、低剥蚀速率下信号波动影响、激光剥蚀脉动式信号导致的光谱螺纹效应、高频激光剥蚀造成的元素分馏效应等。为此,一些学者设计了不同规格和样式的激光剥蚀信号平滑装置来克服这些问题。但是,这些信号平滑装置普遍还存在气体吹扫时间过长和降低激光剥蚀信号灵敏度等问题。因此，研制新型的信号平滑装置对改善LA—ICp—MS的数据质量具有重要的意义。

关键词：微区地质样品铅同位素成矿物质来源高空间分辨率脉动式等离子体质谱演化历史观察视野同位素组成

Comparison of success rate and intraocular pressure spikes between selective laser trabeculoplasty and micropulse laser trabeculoplasty in African American and hispanic patients

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International Journal of Ophthalmology(english edition) 2023年第1期16卷 75-80页

作者： Alexander z Robin palwasha Syar dana darwish Catherine Thomas NMpfahler Agni Kakouri Thomas patrianakos Michael Giovingo department of Ophthalmology John H.StrogerJr.Hospital of Cook CountyChicagoIL 60612USA Rosalind Franklin University of Medicine and Science North ChicagoIL 60064USA department of Ophthalmology and Visual Science University of Illinois at ChicagoChicagoIL 60612USA department of General Surgery University of Texas at HoustonHoustonTX 77030USA

AIM:To examine the efficacy and safety of micropulse laser trabeculoplasty(MLT)versus selective laser trabeculoplasty(SLT)in a large cohort of primarily African American and hispanic ***:A single center retrospective comparative cohort review conducted at Cook County health facilities that included patients with a diagnosis of open angle glaucoma or ocular hypertension who received an SLT or MLT procedure between January 2017 and May ***:Totally 131 eyes of 99 patients were *** 77 eyes received SLT and 54 received *** out of 77 eyes in the SLT group(9.1%)and 1 out of 54 eyes in the MLT group(1.9%)had an IOp spike(defined as>5 mm hg)at either 1h or 1wk after procedure(p=0.05,Chisquared test with haldane-Anscombe correction).The procedure failure rate at one year was 50%for SLT and 48%for MLT(p=0.31).CONCLUSION:MLT has a significantly lower incidence of pressure spikes and a similar treatment failure rate at 1-year post-procedure,demonstrating that it is a reasonable alternative compared to SLT.

关键词： selective laser trabeculoplasty micropulse laser trabeculoplasty glaucoma open angle glaucoma ocular hypertension

A mathematical model to simulate heap(bio)-leaching process:An exact conceptual model,homotopy theory and comparative insights with conventional methods

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International Journal of Modeling, Simulation, and Scientific Computing 2017年第1期8卷 271-296页

作者： M.yaghobi Moghaddam S.z.Shafaei Tonkaboni M.Noaparast F.doulati Ardejani School of Mining College of Engineering University of TehranP.O.Box 14395-515TehranIran

This paper attempts to address some nonlinear differential equations which describe main mechanisms governing heap(bio)leaching process as an important metallurgical facility in mining and mineral processing *** homotopy perturbation Method(hpM),Finite Volume Method and Analytical(Laplace)Method have been employed to provide proper solutions for these *** was made between the methods and agreement was close;considering the fact that the proposed solution in comparison with the others provided a remarkable accuracy in dealing with nonlinear problems associated with mining and mineral processing *** maximum error of hpM in relation to the analytical solution was *** numerical finite volume method incorporating a computational fluid dynamics model termed phOeNICS provided rational and accurate results;describing that many chemical and biological processes extremely affect the transportation mechanism of the aqueous compounds in a heap structure and subsequently on the process ***,all solution methods presented to simulate heap leaching process provided valuable information related to the time dependence concentrations of dissolved *** results obtained from this study can be effectively applied to manage the heap leaching costs to make the process feasible.

关键词： diffusion-advection-reaction equations nonlinear problems homotopy perturbation method finite volume method analytical solution heap(bio)-leaching

Nickel oxide thin films grown by chemical deposition techniques: potential and challenges in next-generation rigid and flexible device applications

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InfoMat 2021年第5期3卷 536-576页

作者： Mari Napari Tahmida N.huq Robert L.z.hoye Judith L.MacManus-driscoll department of Materials Science and Metallurgy University of CambridgeCambridgeUK Centre for electronics Frontiers Zepler Institute for Photonics and NanoelectronicsUniversity of SouthamptonSouthamptonUK department of Materials Imperial College LondonLondonUK

Nickel oxide(NiOx),a p-type oxide semiconductor,has gained significant attention due to its versatile and tunable *** has become one of the critical materials in wide range of electronics applications,including resistive switching random access memory devices and highly sensitive and selective sensor *** addition,the wide band gap and high work function,coupled with the low electron affinity,have made NiOx widely used in emerging optoelectronics and p-n *** properties of NiOx thin films depend strongly on the deposition method and *** implementation of NiOx in next-generation devices will require controllable growth and processing methods that can tailor the morphological and electronic properties of the material,but which are also compatible with flexible *** this review,we link together the fundamental properties of NiOx with the chemical processing methods that have been developed to grow the material as thin films,and with its application in electronic *** focus solely on thin films,rather than NiOx incorporated with one-dimensional or two-dimensional *** review starts by discussing how the p-type nature of NiOx arises and how its stoichiometry affects its electronic and magnetic *** discuss the chemical deposition techniques for growing NiOx thin films,including chemical vapor deposition,atomic layer deposition,and a selection of solution processing approaches,and present examples of recent progress made in the implementation of NiOx thin films in devices,both on rigid and flexible ***,we discuss the remaining challenges and limitations in the deposition of device-quality NiOx thin films with chemical growth methods.

关键词： atomic layer deposition chemical vapor deposition electronics nickel oxide solution processing thin films

Autoimmune complications and clinical outcomes of herpes simplex encephalitis in children: A case series

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Asian pacific Journal of Tropical Medicine 2023年第5期16卷 232-238页

作者： Gül demet KayaÖzçora elif Söbü Türkan UygurŞahin enes Salı Gonca Bektaş department of pediatric Neurology Health Sciences FacultyHasan Kalyoncu UniversityGaziantepTurkey department of pediatric endocrinology Kartal Dr.Lutfi Kirdar City HospitalIstanbulTurkey department of pediatric Neurology Bezmialem University Medical FacultyIstanbulTurkey department of pediatric Infectious diseases Umraniye Research and Training HospitalIstanbulTurkey department of pediatric Neurology Boston Children’s HospitalBostonUSA

Objective:To report the neurologic prognosis and autoimmune complications of 16 cases of childhood herpes simplex virus ***:The study was conducted atŞanlıurfa Training and Research hospital,Turkey from June 2017 to August *** study included 16 pediatric patients aged between 6 months and 17 years(median age 77.7 months)who were diagnosed with herpes simplex virus type 1 encephalitis by pediatric infectious disease and pediatric neurology *** were followed using patient records,and interviews at the pediatric neurology clinic or via the *** and demographic data,received therapies,neurologic prognosis and complications were ***:patients with and without autoimmune encephalitis were compared in terms of age,sex,symptom duration before treatment,initial cerebrospinal fluid protein,glucose,red blood count and white blood count but no significant difference was *** complications were seen in four patients.N-methyl-d-aspartate encephalitis was observed in three patients and choreoathetosis was seen in one *** average follow-up period was 48.3 ***-five percent of the patients were receiving multiple antiepileptic drug(Aed)treatment,43.8%were receiving single Aed treatment and 31.3%were not receiving Aed treatment at the end of the *** disability was observed in 12.5%and drug-resistant epilepsy was observed in 6.3%who had autoimmune ***:Seizures and movement disorders were controlled with immunotherapy and autoantibodies should be studied *** should be started early upon recognition of autoimmune complications through follow-up by measuring autoantibody levels and clinical examination *** prevention and curative treatment modalities are needed to avoid herpes simplex virus encephalitis complications.

关键词： herpes simplex virus encephalitis Autoimmune complications epilepsy Children Steroid prognosis