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Synergistic interactions between the charge‐transport and mechanical properties of the ionic‐liquid‐based solid polymer electrolytes for solid‐state lithium batteries

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Carbon Energy 2023年第11期5卷 44-53页

作者： Ashutosh Agrawal Saeed Yari hamid hamed Tom Gouveia Rongying Lin Mohammadhosein Safari Institute for Materials Research(IMOimomec) UHasseltHasseltBelgium Energyville GenkBelgium Solvionic ToulouseFrance IMEC Division IMOMEC DiepenbeekBelgium

The performance sensitivity of the solid‐state lithium cells to the synergistic interactions of the charge‐transport and mechanical properties of the electrolyte is well acknowledged in the literature,but the quantitative insights therein are very ***,the charge‐transport and mechanical properties of a polymerized ionic‐liquid‐based solid electrolyte are *** transference number and diffusion coefficient of lithium in the concentrated solid electrolyte are measured as a function of concentration and stack *** elastoplastic behavior of the electrolyte is quantified under compression,within a home‐made setup,to substantiate the impact of stack pressure on the stability of the Li/electrolyte interface in the symmetric lithium *** results spotlight the interaction between the concentration and thickness of the solid electrolyte and the stack pressure in determining the polarization and stability of the solid‐state lithium batteries during extended cycling.

关键词： battery diffusion pressure solid state transference

Bridging the microstructural evolutions from slurry to porous electrode of a lithium-ion battery

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Journal of Energy Chemistry 2023年第9期84卷 329-334页

作者： hamid hamed Zoleikha Mirzaie Alamooti Ashutosh Agrawal Jan D'Haen An Hardy Mohammadhosein Safari Institute for Materials Research(IMO-imomec) UHasseltMartelarenlaan 42B-3500 HasseltBelgium Energyville Thor Park 8320B-3600 GenkBelgium IMEC Division IMOMEC BE-3590Belgium

1. Introduction The porous electrodes are the crucial components of the modern electrochemical devices including lithium-ion batteries. The detailed configuration of the lithium-insertion, carbon black, and PVDF binder particles in a typical electrode of a lithium-ion cell has a significant impact on its energy and power density. A thinner electrode is desired to decrease the battery volume particularly for portable electronics and mobility applications.

关键词： density. lithium electrode

Monte Carlo Simulation and a Review of the Physics of the Positron Annihilation Process in PET

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Engineering（科研） 2013年第10期5卷 12-17页

作者： hamed hamid Muhammed Ziya Zengin Division of Informatics Logistics and Management School of Technology and Health STH Royal Institute of Technology KTH Stockholm Sweden Department of Biophysics Faculty of Medicine Karadeniz Technical University Trabzon Turkey

In this paper, we investigate the physics of the positron annihilation process, which occurs in a PET imaging system. In particular, the diffusion of beta particles (positrons) within water was addressed. Beta particles are emitted isotropically from the same source point with random directions and randomly chosen energy levels. After traversing a certain distance within water, beta particles lose a certain amount of its energy. The inelastic collisions with atomic electrons are mainly responsible for the energy dissipation of charged particles, such as electrons and positrons (that have low mass). The energy loss rate due to inelastic process is estimated by using the Beta-Bloch formula. These results help in understanding how to develop and implement a computationally efficient Monte Carlo Simulation of the positron annihilation process.

关键词： Positron Annihilation Physics Positron Emission Tomography Monte Carlo Simulation

New Approach for Limited-Angle Problems in Electron Microscope Based on Compressed Sensing

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Engineering（科研） 2013年第10期5卷 575-578页

作者： Marc Vila Oliva hamed hamid Muhammed Royal Institute of Technology KTH School of Technology and Health STH Alfred Nobels Huddinge Sweden

New advances within the recently rediscovered field of Compressed Sensing (CS) have opened for a great variety of new possibilities in the field of image reconstruction and more specifically in medical image reconstruction. In this work, a new approach using a CS-based algorithm is proposed and used in order to solve limited-angle problems (LAPs), like the ones that typically occur in computed tomography or electron microscope. This approach is based on a variant of the Robbins-Monro stochastic approximation procedure, developed by Egaziarian, using regularization by a spatially adaptive filter. This proposal consists on filling the gaps of missing or unobserved data with random noise and enabling a spatially adaptive denoising filter to regularize the data and reveal the underlying topology. This method was tested on different 3D transmission electron microscope datasets that presented different missing data artifacts (e.g, wedge or cone shape). The test results show a great potential for solving LAPs using the proposed technique.

关键词： Compressed Sensing Image Reconstruction Adaptive Filters Limited Angle Problem TEM

Skin Cancer Detection Using Temperature Variation Analysis

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Engineering（科研） 2013年第10期5卷 18-21页

作者： Ahmed M. Nasr Moustafa hamed hamid Muhammed Moustapha Hassan Clinical Research Center Novum Karolinska University Hospital Huddinge Stockholm Sweden Division of Informatics Logistics and Management School of Technology and Health STH Royal Institute of Technology KTH Stockholm Sweden

In the medical field, new technologies are incorporated for the sole purpose of enhancing the quality of life for the patients and even for the normal healthy people. Infrared technology is one of the technologies that have some applications in both the medical and biological fields. In this work, the thermal infrared (IR) measurement is used to investigate the potential of skin cancer detection. IR enjoys non-invasive and non-contact advantages as well as favorable cost, apparently. It is also very well developed regarding the technological and methodological aspects. IR per se is an electro-metric radiation that all objects emit when their temperature is above the absolute zero. And the human body is not different in this regard. The IR range extends, ideally, to cover wavelengths from 800 nanometer to few hundred micrometer. Cancer, in modern life, has grown tangibly due to many factors, such as life expectancies increase, personal habits and ultraviolet radiation exposures among others. Moreover, the significant enhancement of technologies has helped identifying more types of cancers than before. The sole purpose of this work is to investigate further IR technology methods and applications not yet matured in skin cancer detection to enhance the detection ability with higher safety level.

关键词： Infrared Skin Cancer Melanoma Thermal Detection

A New Approach to the Presentation of Myocardial SPECT Images——Radial Slices——Data Reduction without Loss of Information

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Engineering（科研） 2013年第10期5卷 113-117页

作者： Niloufar Darvish Fatma Nadide Ocba hamed hamid Muhammed Dianna Bone School of Technology and Health STH Royal Institute of Technology KTHAlfred Nobels Alle10SE-14152 HuddingeSweden Department of Clinical Physiology Thoracic ClinicsKarolinska HospitalSE-17671 StockholmSweden

Objective: SPECT data from myocardial perfusion imaging (MPI) are normally displayed as a set of three slices orthogonal to the left ventricular (LV) long axis. For data presentation, the images are orientated about the LV long axis. Therefore, radial slices provide a suitable alternative to standard orthogonal slices, with the advantage of requiring fewer slices to adequately represent the data. In this study, a semi-automatic method is developed for displaying MPI SPECT data as a set of radial slices orientated about the LV axis. The aim is to reduce the number of slices viewed without loss of information and independently from the heart size. Method: Standard short axis slices, orientated perpendicular to the LV axis, are *** skeleton of the segmented myocardium is found and the true LV axis is determined in each central long slice. The LV axis of the whole volume is determined by aligning the axes of all slices. Result: Radial slices centered about this axis were generated by integration over a sector equal to the resolution of the imaging system which was of the order of 1.2 cm. Therefore, assuming a mean LV diameter of 8 cm, 20 slices were sufficient to represent a non-gated study. Gated information could be adequately displayed with 4 slices integrated over an angle of 45. Conclusion: A semi-automatic method for generating radial slices from SPECT MPI short axis slices has been developed.

关键词： Myocardial Perfusion SPECT Cardiac Left Ventricle Radial Slices Left Ventricular Long Axis

Using Ultrasonic Spectrometry to Estimate the Stability of a Dental Implant Phantom

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Engineering（科研） 2013年第10期5卷 570-574页

作者： hamed hamid Muhammed Satya V. V. N. Kothapalli School of Technology and Health STH Royal Institute of Technology KTH Alfred Nobels Alle 10 Stockholm Sweden

A challenging problem in dental implant surgery is to evaluate the stability of the implant. In this simulation study, an experimental phantom is used to represent a jawbone with a dental implant. It is made of a little pool filled with soft-tissue equivalent material and a disc of fresh Oakwood with a metal screw. Varying levels of contact between screw and wood are simulated by screwing in or out the screw. Initially, the screw is screwed in and fixed firmly in wood. Thereafter, the screw is screwed out, a half turn each time, to increase the gap gradually between wood and screw. Pulse-echo ultrasound is used and the power spectra of the received echo-signals are computed. These spectra are normalized then analyzed by using the partial least squares method to estimate the corresponding implant stiffness grade in terms of number of turns when beginning from the initial tight-screw state then screwing out the screw. A coefficient of determination R2 of 96.4% and a mean absolute error of ±0.23 turns are achieved when comparing real and estimated values of stiffness grades, indicating the efficiency of this approach.

关键词： Dental Implant Stability Partial Least Squares Ultrasonic Spectrometry Spectral Analysis

基于高光谱成像技术的药用胶囊铬含量快速检测方法研究

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计量学报 2017年第6期38卷 765-769页

作者：陈丰农陈浦兰谢亚平应南娇 hamed hamid Muhammed 杨勇杭州电子科技大学生命信息与仪器工程学院浙江杭州310018 School of Technology and Health KTH Royal Institute of Technology 新疆医科大学附属肿瘤医院经管办新疆乌鲁木齐830011

研究了基于高光谱成像技术快速检测药用胶囊铬含量的方法。首先应用传统的原子吸收分光法对药用明胶空心硬胶囊分析结果作为对照组,再对1048个胶囊(含正常和含有重金属铬)样本的高光谱数据进行降维和定性分析,最后选择偏最小二乘判别分... 详细信息

研究了基于高光谱成像技术快速检测药用胶囊铬含量的方法。首先应用传统的原子吸收分光法对药用明胶空心硬胶囊分析结果作为对照组,再对1048个胶囊(含正常和含有重金属铬)样本的高光谱数据进行降维和定性分析,最后选择偏最小二乘判别分析方法对光谱数据进行处理。当用4个偏最小二乘算子(LV)作为偏最小二乘法模型中的输入特征,分类准确率可达100%,2种样本的交叉验证和样本预测相关系数分别为0.923和0.972;敏感度与特异度均为100%。

关键词：计量学胶囊检测铬高光谱图像光谱分析 PLS-DA模型

Effect of Silica Fume on Compressive Strength of Oil-Polluted Concrete in Different Marine Environments

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China Ocean Engineering 2017年第6期31卷 716-723页

作者： hamid SHAHRABADI Sina SAYAREH hamed SARKARDEH Department of Civil Engineering Chabahar Maritime UniversityChabaharIran Department of Civil Engineering University of Sistan&BaluchestanZahedanIran Department of Civil Engineering Faculty of EngineeringHakim Sabzevari UniversitySabzevarIran

In the present research, effect of silica fume as an additive and oil polluted sands as aggregates on compressive strength of concrete were investigated experimentally. The amount ofoil in the designed mixtures was assumed to be constant and equal to 2% of the sand weight. Silica fume accounting for 10%, 15% and 20% of the weight is added to the designed mixture. After preparation and curing, concrete specimens were placed into the three different conditions： fresh, brackish and saltwater environments （submerged in fresh water, alternation of exposed in air ＆ submerged in sea water and submerged in sea water）. The result of compressive strength tests shows that the compressive strength of the specimens consisting of silica fume increases significantly in comparison with the control specimens in all three environments. The compressive strength of the concrete with 15% silica fume content was about 30% to 50% higher than that of control specimens in all tested environments under the condition of using polluted aggregates in the designed mixture.

关键词： compressive strength water environments oil polluted sands silica fume marine concrete structures