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Modification strategies improving the electrochemical and structural stability of high-Ni cathode materials

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Journal of Energy Chemistry 2024年第9期96卷 185-205页

作者： Yoon Bo Sim hami Lee Junyoung Mun Ki Jae Kim Department of Energy Science Sungkyunkwan UniversitySuwon 16419Republic of Korea School of Advanced Materials Science and Engineering Sungkyunkwan UniversitySuwon 16419Republic of Korea SKKU Institute of Energy Science and Technology(SIEST) Sungkyunkwan UniversitySuwon 16419Republic of Korea

With the increasing spotlight in electric vehicles,there is a growing demand for high-energy-density batteries to enhance driving ***,several studies have been conducted on high-energy-density LiNi_(x)Co_(y)Mn_(z)O_(2)***,there is a limit to permanent performance deterioration because of side reactions caused by moisture in the atmosphere and continuous microcracks during cycling as the Ni content to express high energy increases and the content of Mn and Co that maintain structural and electrochemical stabilization *** direct modification of the surface and bulk regions aims to enhance the capacity and long-term performance of high-Ni cathode ***,an efficient modification requires a study based on a thorough understanding of the degradation mechanisms in the surface and bulk *** this review,a comprehensive analysis of various modifications,including doping,coating,concentration gradient,and single crystals,is conducted to solve degradation issues along with an analysis of the overall degradation mechanism occurring in high-Ni cathode *** also summarizes recent research developments related to the following modifications,aims to provide notable points and directions for post-studies,and provides valuable references for the commercialization of stable high-energy-density cathode materials.

关键词： High energy density High-Ni cathode materials Degradation Structural stability Lithium-ion battery

基于变分法的四轮转向机动车辆路径规划及最优控制研究

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Acta Mechanica Sinica 2024年第2期40卷 147-161页

作者： hami Tourajizadeh Mohsen Sarvari Samira Afshari Mechanical Engineering Department Faculty of EngineeringKharazmi UniversityTehranIran University of Iowa Iowa CityIowaUSA

使用变分法对四轮转向机动车辆(4WSV)进行最优控制研究,并根据预定目标函数提取出相对最优路径.当前,4WS车辆因为其出色的操控性能增长迅速.由于4WS车辆系统是过约束的,因此车辆在两个确定边界之间可能轨迹并不唯一.由此,通过最小化预... 详细信息

使用变分法对四轮转向机动车辆(4WSV)进行最优控制研究,并根据预定目标函数提取出相对最优路径.当前,4WS车辆因为其出色的操控性能增长迅速.由于4WS车辆系统是过约束的,因此车辆在两个确定边界之间可能轨迹并不唯一.由此,通过最小化预定成本函数提取最优路径成为一项有益的研究.为了达到此目的,本文首先确定系统模型,随后应用变分法来进行车辆的最优控制.控制输入的最优值不仅满足边界条件,同时实现特定成本函数的最小化.成本函数被设定为最小化误差和能量消耗,并对相应最优路径也进行了计算.为了验证模型的正确性,本文将MATLAB的仿真结果与CarSim进行了比较.通过在MATLAB中进行解析和比较性模拟场景的分析,研究最优控制方法的效率.通过比较相应的成本函数,证明了本文提出的控制方法相较非最优策略的优越性.最后证明本文提出的最优控制方法可以获得两个预定边界之间的最优路径,并通过该使用变分法对四轮转向机动车辆(4WSV)进行最优控制研究,并根据预定目标函数提取出相对最优路径.当前,4WS车辆因为其出色的操控性能增长迅速.由于4WS车辆系统是过约束的,因此车辆在两个确定边界之间可能轨迹并不唯一.由此,通过最小化预定成本函数提取最优路径成为一项有益的研究.为了达到此目的,本文首先确定系统模型,随后应用变分法来进行车辆的最优控制.控制输入的最优值不仅满足边界条件,同时实现特定成本函数的最小化.成本函数被设定为最小化误差和能量消耗,并对相应最优路径也进行了计算.为了验证模型的正确性,本文将MATLAB的仿真结果与CarSim进行了比较.通过在MATLAB中进行解析和比较性模拟场景的分析,研究最优控制方法的效率.通过比较相应的成本函数,证明了本文提出的控制方法相较非最优策略的优越性.最后证明本文提出的最优控制方法可以获得两个预定边界之间的最优路径,并通过该路径可以实现最大准确性和最小能量消耗.

关键词：成本函数最优控制机动车辆变分法能量消耗四轮转向车辆路径规划最优路径

The Research on Strategic Management for the Start-up ’Drink Asian’

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The Research on Strategic Management for the Start-up ’Drin...

作者： hami USTA 上海交通大学

学位级别：硕士

The entrepreneurial personalities conveyed us to leading emerging power of the world,China,to encounter the stream of this *** primary objective was whether to comprehend what could be acquired from it or how could be part of and contribute *** these lines,our entrepreneurial minds began discovering the distinctions in daily,social and working life as well as the *** observations led to realization of the tea culture in Shanghai that is found tempting ground to some place down in for a man who originate from a place where people drink tea each hour of the ***,a step was taken forward and proceeded to comprehend these shops’ plan of ***,the business model of established shops in Shanghai is found promising however,principle inquire about question was remaining solitary,which is likelihood of a comparable result in *** that,this strategic research was developed and tested the idea that to realize viability of the business plan in *** credibility of the business plan was assessed primarily through examination of national context,detailed industry analysis,customer insights and the strategic construction towards all these *** context examined thoroughly with PEST analysis that provided key insights for prospective companies intended to get in the *** industry analysis was constructed that general information,detailed value chain and overall volume of the industry were ***,more importantly,the competition in the specific marketplace was analyzed through Porter’s five forces to understand the profitability of this specific ***,main properties,demographics,spending behaviors and expectation of targeted groups reviewed in deep ***,the strategic implementation design completed in the guidance of globally accepted business theories as well as the facts generated from intended country,industry and consumer group *** contributio

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Oil accumulation related to migration of source kitchens in the Lukeqin structural belt, Turpan-hami Basin, China

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Petroleum Science 2010年第3期7卷 355-361页

作者： Liu Bo Huang Zhilong Tu Xiaoxian Sang Tingyi Chen Xuan State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing 102249 China PetroChina Turpan-hami Oilfield Company Hami Xinjiang 839009 China

The Lukeqin structural belt is the main heavy oil accumulation zone in the Turpan-hami Basin. The recent discovery of light oil in the Triassic indicates that there may be multiple source kitchens contributing to the oil accumulation. According to oil geochemical analysis and oil-source correlation, the oil in deep and shallow reservoirs of the Lukeqin Oilfield presents different physical and saturated hydrocarbon mass spectrum characteristics. The Triassic heavy oil is from the northern Upper Permian lacustrine source rocks, and the light oil represented by the Yudong-9 Well is from the northwestern Lower Jurassic coal-measure source rocks. The timing of oil charging was determined by K/Ar isotope dating, reservoir fluid inclusion analysis and the evolution history of different source rocks. In summary, the accumulation process consists of two stages. From the end of Triassic to early Jurassic, the northern Permian source kitchen generated a considerable amount of oil, which was finally degraded to heavy oil, migrated to the south and then accumulated. The northwestern Jurassic coal-measure source kitchen began to generate oil at the end of Cretaceous, while the northern source kitchen could only generate a little hydrocarbon. The heavy oil and the light oil have different source rock locations, migration directions and accumulation times. The migration of hydrocarbon source kitchens affects the distribution of heavy oil and light oil reservoirs at the present time.

关键词： Source kitchen light oil oil-source correlation timing of oil charging Turpan-hami Basin

Panorama of Oil and Gas Exploration inTurpan-hami Basin

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China Oil & Gas 1997年第1期4卷 16-18页

作者： Wang Wuhe (Senior Geologist of Turpan-hami Petroleum Research Institute, CNPC) Senior Geologist of Turpan-hami Petroleum Research Institute CNPC

Turpan-hami Basin (abbreviated to Tuha Basin) is one of the three largest petroliferous basins in the Xinjiang Uygur Autonomous Region of China with a total area of 53500km2. Its reserves and production of oil and gas have rapidly increased since 1990. By the end of 1995, the reserves of about 200 million tons of oil and 70 billion cubic meters of gas have been proved, with the annual oil productivity reaching three million tons. A new area of oil/gas fields has risen in East Xinjiang.

关键词： Exploration Coal-formed oil Reserve Jurassic

Hydrocarbon Habitat of the Jurassic Sequence in Turpan-hami Basin

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China Oil & Gas 1994年第4期1卷 17-20页

作者： Wang Changoui and Leng Shengrong(Turpan-hami Petroleum Exploration & Development Bureau,CNPC) Turpan-hami Petroleum Exploration & Development Bureau.CNPC

Turpan一hami Basin,located in eastern Xi-njiang Autonomous region,is an.l elongated inter-montane basin in Tianshan mountains and covers an area about 50000 km^(2).

关键词： Jurassic Hydrocarbon Coal measures Basin Geological Structure

Prediction of diabetes and hypertension using multi-layer perceptron neural networks

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International Journal of Modeling, Simulation, and Scientific Computing 2021年第2期12卷 120-137页

作者： Hani Bani-Salameh Shadi MAlkhatib Moawyiah Abdalla Mo’taz Al-hami Ruaa Banat Hala Zyod Ahed J Alkhatib Department of Software Engineering The Hashemite University ZarqaJordan Department of Computer Information System The Hashemite University ZarqaJordan Department of Legal Medicine School of Medicine JUSTJordan

Background:Diabetes and hypertension are two of the commonest diseases in the *** they unfavorably affect people of different age groups,they have become a cause of concern and must be predicted and diagnosed well in ***:This research aims to determine the effectiveness of artificial neural networks(ANNs)in predicting diabetes and blood pressure diseases and to point out the factors which have a high impact on these ***:This work used two online datasets which consist of data collected from 768 *** applied neural network algorithms to predict if the individuals have those two diseases based on some *** prediction is based on five factors:age,weight,fat-ratio,glucose,and insulin,while blood pressure prediction is based on six factors:age,weight,fat-ratio,blood pressure,alcohol,and ***:A model based on the Multi-Layer Perceptron Neural Network(MLP)was *** inputs of the network were the factors for each disease,while the output was the prediction of the disease’s *** model performance was compared with other classifiers such as Support Vector Machine(SVM)and K-Nearest Neighbors(KNN).We used performance metrics measures to assess the accuracy and performance of ***,a tool was implemented to help diagnose the diseases and to understand the ***:The model predicted the two diseases with correct classification rate(CCR)of 77.6%for diabetes and 68.7%for *** results indicate that MLP correctly predicts the probability of being diseased or not,and the performance can be significantly increased compared with both SVM and *** shows MLPs effectiveness in early disease prediction.

关键词： Artificial Neural Network(ANN) Multi-Layer Perceptron(MLP) SVM KNN decision-making prediction tools diabetes blood pressure hypertension software tools

A Novel Technique for Evaluating Failure Probability of Random Structure

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World Journal of Mechanics 2015年第8期5卷 139-150页

作者： Seifedine Kadry Abdelkhalak El hami American University of the Middle East Egaila Kuwait INSA of Rouen Institute Normandy University St. Etienne du Rouvray France

The purpose of this article is to develop a new methodology to evaluate the statistical characteristic of the response of structures subjecting to random excitation, by combining the Finite Element Method (FEM) with the Transforming Density Function (TDF). Uncertainty modeling of structure with random variables encourages the coupling of advanced TDF for reliability analysis to analyze problems of stochastic mechanical systems. The TDF is enthusiastically applicable in the situation where the relationship between input and output of structures is available in explicit analytical form. However, the situation is much more involved when it is necessary to perform the evaluation of implicit expression between input and output of structures through numerical models. For this aim, we propose a new technique that combines the FEM software, and the TDF method to evaluate the most important statistical parameter the Probability Density Function (PDF) of the response where the expression between input and output of structures is implicit. Once the PDF is evaluated, all other statistical parameters are derived easily. This technique is based on the numerical simulations of the FEM and the TDF by making a middleware between Finite Element software and Matlab. Some problems, range from simple to complex, of structures are analyzed using our proposed technique. Its accuracy is validated through Monte-Carlo simulation.

关键词： Random Parameter Uncertainty Transforming Density Function Finite Element Method Finite Element Software Matlab Structures

Acquired von Willebrand Syndrome in a Male with Systemic Lupus Erythematosus Presented with Mucocutaneous Bleeding and Treated with rFVIIa

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International Journal of Clinical Medicine 2014年第1期5卷 23-27页

作者： Maryam hami Hassan Ahmadnia Zahra Rezaieyazdi Hassan Mansouritorghabeh Allergy Research Center Ghaem Hospital School of Medicine Mashhad University of Medical Sciences Mashhad Iran Endoscopic & Minimally Invasive Surgery Research Center Ghaem Hospital School of Medicine Mashhad University of Medical Sciences Mashhad Iran Kidney Transplantation Complications Research Center Department of Internal Medicine Ghaem Hospital School of Medicine Mashhad Uni-versity of Medical Sciences Mashhad Iran Rheumatic Disease Research Center Ghaem Hospital School of Medicine Mashhad University of Medical Sciences Mashhad Iran

Background: Systemic lupus erythematosis (SLE) is a disorder with multiple organ involvement. Haematological abnormalities have been addressed in it, but acquired von Willebrand syndrome is a rarer phenomenon in current disease. The Case: We report acquired von Willebrand syndrome and SLE in a man with brown rash on face, gingival bleeding, easy bruising and epistaxis and laboratory finding of decreased complement, high level of anti-nuclear antibody and anti-DNA. These findings confirmed the diagnosis of SLE. He underwent kidney biopsy and experienced severe pain at the site of biopsy, but the ultra-sonography evaluation showed small sub capsular haematoma at the site of biopsy. During the next 48 hours, gradually APTT prolongation was continued and haematocrit dropped. In spite of FFP infusion and taking tranexamic acid every eight hours, there wasn’t any improvement in haemostatic condition. He received Methylprednisolone and Cyclophosphamid pulses. The patient underwent surgery to roll out vascular complication, but there wasn’t any vascular problem. On the third day, recombinant activated factor VII was infused every two hours until oozing was stopped.

关键词： Acquired von Willebrand Disease Lupus Erythematosus Systemic rFVIIa Bleeding