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An overview of intelligent selection and prediction method in heterogeneous wireless networks

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Journal of Central South University 2014年第8期21卷 3138-3154页

作者： Yass k.Salih Ong Hang see Rabha w.Ibrahim Salman Yussof Azlan Iqbal College of Engineering Universiti Tenaga Nasional Institute of Mathematical Sciences Faculty of Science BuildingUniversiti of Malaya College of Information Technology Universiti Tenaga Nasional

Heterogeneous wireless access technologies will coexist in next generation wireless *** technologies form integrated networks,and these networks support multiple services with high quality *** access technologies allow users to select the best available access network to meet the requirements of each type of communication *** always best connected anytime and anywhere is a major concern in a heterogeneous wireless networks *** best connected enables network selection mechanisms to keep mobile users always connected to the best *** present an overview of the network selection and prediction problems and *** addition,we discuss a comprehensive classification of related theoretic approaches,and also study the integration between these methods,finding the best solution of network selection and prediction *** optimal solution can fulfill the requirements of the next generation wireless networks.

关键词： heterogeneous wireless networks network selection network prediction always best connected

Population inversion in fluorescing fragments of super-excited molecules inside an air filament

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Chinese Physics B 2015年第1期24卷 36-42页

作者： see-Leang Chin 徐淮良 Department of Physics Engineering Physics and Optics & Center for Optics Photonics and Laser (COPL)Laval University Quebec QC G1V 0A6 Canada State key Laboratory on Integrated Optoelectronics College of Electronic Science and EngineeringJilin University

An original idea is reviewed. when a molecule is pumped into a super-excited state, one of its decay channels is neutral dissociation. One or more of the neutral fragments will fluoresce. Hence, if a lower state of such fluorescing fragments was populated through other channels but with a lower probability, population inversion of the fluorescing fragments would be naturally realized. This idea seems to be validated, so far, by comparing published work on three hydrocarbon molecules, CH4, C2H2, C2H4, and water vapor, H2 O. After super-excitation in a femtosecond laser filament in air mixed with these molecules, the fluorescence from the CH or OH fragments exhibits population inversion, i.e., amplified spontaneous emission was observed in the backscattering direction of the filament.

关键词： femtosecond filament lasing super-excited states

Understanding the beam self-cleaning behavior of ultrashort laser pulse filamentation

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Science China(Technological Sciences) 2007年第4期50卷 413-421页

作者： see Leang Chin Department of Physics Engineering Physics and Optics & Center for Optics photonics and Laser (COPL) Laval University Quebec Canada G1K 7P4

In this paper we report a recent study on the beam self-cleaning behavior occurred during the ultrashort laser pulse filamentation process. The propagation of a Gaussian beam with distorted beam profile is numerically simulated based on the nonlinear wave equation. Our results demonstrate that when the power is not too high so that multiple filaments are not yet induced, the intensity perturbation con-tained in the initial beam profile could be treated as high order spatial modes su-perpositioning on a fundamental mode. Then the self-focusing of the laser beam acts as a spatial filter. It focuses the fundamental mode toward the propagation axis, and produces a fundamental mode profile at the self-focus. while the strong diffraction of higher order modes could not be counteracted by the self-focusing. Therefore their propagation is mainly governed by the divergence without de-stroying the high profile quality at the self-focal region. These lead to the observa-tion of beam profile self-cleaning behavior.

关键词： filamentation ultrashort pulse self-cleaning

Critical review and functional safety of a battery management system for large‑scale lithium‑ion battery pack technologies

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International Journal of Coal Science & Technology 2022年第3期9卷 1-17页

作者： k.w.see Guofa wang Yong Zhang Yunpeng wang Lingyu Meng Xinyu Gu Neng Zhang k.C.Lim L.Zhao Bin Xie Azure Mining Technology CCTEG 821 Pacifc HighwaySydneyNSW 2067Australia China Coal Research Institute Beijing 100013China China Mining Products Safety Approval and Certifcation Center Beijing 100013China School of Mechanical Electronic and Information Engineering China University of Mining and TechnologyBeijing 100083China Beijing Tianma Intelligent Control Technology Co. LtdBeijing 101399China Australian Institute for Innovative Materials Institute for Superconducting and Electronic MaterialsUniversity of WollongongInnovation CampusWollongongNSW 2500Australia

The battery management system(BMS)is the main safeguard of a battery system for electric propulsion and machine *** is tasked to ensure reliable and safe operation of battery cells connected to provide high currents at high voltage *** addition to efectively monitoring all the electrical parameters of a battery pack system,such as the voltage,current,and temperature,the BMS is also used to improve the battery performance with proper safety measures within the *** growing acceptance of lithium-ion batteries,major industry sectors such as the automotive,renewable energy,manufacturing,construction,and even some in the mining industry have brought forward the mass transition from fossil fuel dependency to electric powered machinery and redefned the world of energy ***,the functional safety considerations,which are those relating to automatic protection,in battery management for battery pack technologies are particularly important to ensure that the overall electrical system,regardless of whether it is for electric transportation or stationary energy storage,is in accordance with high standards of safety,reliability,and *** the system or product fails to meet functional and other safety requirements on account of faulty design or a sequence of failure events,then the environment,people,and property could be *** paper analyzed the details of BMS for electric transportation and large-scale energy storage systems,particularly in areas concerned with hazardous *** analysis covers the aspect of functional safety that applies to BMS and is in accordance with the relevant industrial standards.A comprehensive evaluation of the components,architecture,risk reduction techniques,and failure mode analysis applicable to BMS operation was also *** article further provided recommendations on safety design and performance optimization in relation to the overall BMS integration.

关键词： Battery management system Functional safety Hazardous area Lithium-ion batteries Failure mode analysis Electric transportation Large-scale energy storage

Metformin-associated lactic acidosis:A mini review of pathophysiology,diagnosis and management in critically ill patients

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world Journal of Diabetes 2024年第6期15卷 1178-1186页

作者： kay Choong see Department of Medicine National University HospitalSingapore 119228Singapore

Metformin is a common diabetes drug that may reduce lactate clearance by inhibiting mitochondrial oxidative phosphorylation,leading to metforminassociated lactic acidosis(MALA).As diabetes mellitus is a common chronic metabolic condition found in critically ill patients,pre-existing metformin use can often be found in critically ill patients admitted to the intensive care unit or the high dependency *** aim of this narrative mini review is therefore to update clinicians about MALA,and to provide a practical approach to its diagnosis and *** in critically ill patients may be suspected in a patient who has received metformin and who has a high anion gap metabolic acidosis,and confirmed when lactate exceeds 5 mmol/*** factors include those that reduce renal elimination of metformin(renal impairment from any cause,histamine-2 receptor antagonists,ribociclib)and excessive alcohol consumption(as ethanol oxidation consumes nicotinamide adenine dinucleotides that are also required for lactate metabolism).Treatment of MALA involves immediate cessation of metformin,supportive management,treating other concurrent causes of lactic acidosis like sepsis,and treating any coexisting diabetic *** MALA requires extracorporeal removal of metformin with either intermittent hemodialysis or continuous kidney replacement *** optimal time to restart metformin has not been *** is nonetheless reasonable to first ensure that lactic acidosis has resolved,and then recheck the kidney function post-recovery from critical illness,ensuring that the estimated glomerular filtration rate is 30 mL/min/1.73 m^(2) or better before restarting metformin.

关键词： Acid-base equilibrium Biguanides Oxidative phosphorylation Pyruvic acid Renal replacement therapy

Glycemic targets in critically ill adults: A mini-review

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world Journal of Diabetes 2021年第10期12卷 1719-1730页

作者： kay Choong see Division of Respiratory and Critical Care Medicine Department of MedicineNational University HospitalSingapore 119228Singapore

Illness-induced hyperglycemia impairs neutrophil function,increases pro-inflammatory cytokines,inhibits fibrinolysis,and promotes cellular *** turn,these mechanisms lead to pneumonia and surgical site infections,prolonged mechanical ventilation,prolonged hospitalization,and increased *** optimal glucose control,blood glucose measurements need to be done accurately,frequently,and *** choosing glycemic targets,one should keep the glycemic variabilitywer limit of blood glucosewer glycemic target range(i.e.,blood glucose 4.5-7.8 mmol/L)would be favored for patients without diabetes mellitus,with traumatic brain injury,or who are at risk of surgical site *** avoid harm from hypoglycemia,strict adherence to glycemic control protocols and timely glucose measurements are *** contrast,a higher glycemic target range(i.e.,blood glucose 7.8-10 mmol/L)would be favored as a default choice for medical-surgical patients and patients with diabetes *** targets may be modified if technical advances for blood glucose measurement and control can be achieved.

关键词： Brain injuries Traumatic Critical care Diabetes mellitus Glycemic control Insulin infusion systems Sepsis

Potential of ginsenoside Rg1 to treat aplastic anemia via mitogen activated protein kinase pathway in cyclophosphamide-induced myelosuppression mouse model

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world Journal of Stem Cells 2024年第11期16卷 900-905页

作者： see-Hyoung Park Biological and Chemical Engineering Hongik UniversitySejong 30016South Korea

Aplastic anemia(AA)is a rare but serious condition in which the bone marrow fails to produce sufficient new blood cells,leading to fatigue,increased susceptibility to infection,and uncontrolled *** this editorial,we review and comment on an article by wang et al published in *** study aimed to evaluate the potential therapeutic benefits of ginsenoside Rg1 in AA,focusing on its protective effects and uncovering the underlying ***(CTX)administration caused substantial damage to the structural integrity of the bone marrow and decreased the number of hematopoietic stem cells,thereby establishing an AA *** with the AA group,ginsenoside Rg1 alleviated the effects of CTX by reducing apoptosis and inflammatory ***,treatment with ginsenoside Rg1 significantly mitigated myelosuppression in mice by inhibiting the mitogen activated protein kinase signaling ***,this study indicates that ginsenoside Rg1 could be effective in treating AA by reducing myelosuppression,primarily through its influence on the mitogen activated protein kinase signaling *** expect that our review and comments will provide valuable insights for the scientific community related to this research and enhance the overall clarity of this article.

关键词： Aplastic anemia Cyclophosphamide Ginsenoside Rg1 Hematopoietic stem cells Apoptosis Inflammation Mitogen activated protein kinase

Customized Additive Manufacturing in Bone Scaffolds-The Gateway to Precise Bone Defect Treatment

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Research 2023年第4期2023卷 79-103页

作者： Juncen Zhou Carmine wang see Sai Sreenivasamurthy Donghui Zhu Department of Biomedical Engineering Stony Brook UniversityStony BrookNYUSA

In the advancing landscape of technology and novel material development,additive manufacturing(AM)is steadily making strides within the biomedical *** away from traditional,one-sizefits-all implant solutions,the advent of AM technology allows for patient-specific scaffolds that could improve integration and enhance wound *** scaffolds,meticulously designed with a myriad of geometries,mechanical properties,and biological responses,are made possible through the vast selection of materials and fabrication methods at our *** the importance of precision in the treatment of bone defects,which display variability from macroscopic to microscopic scales in each case,a tailored treatment strategy is required.A patient-specific AM bone scaffold perfectly addresses this *** review elucidates the pivotal role that customized AM bone scaffolds play in bone defect treatment,while offering comprehensive guidelines for their *** includes aspects such as bone defect imaging,material selection,topography design,and fabrication ***,we propose a cooperative model involving the patient,clinician,and engineer,thereby underscoring the interdisciplinary approach necessary for the effective design and clinical application of these customized AM bone *** collaboration promises to usher in a new era of bioactive medical materials,responsive to individualized needs and capable of pushing boundaries in personalized medicine beyond those set by traditional medical materials.

关键词： thereby offering custom

Impact of inhaled and intranasal corticosteroids on glucose metabolism and diabetes mellitus:A mini review

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world Journal of Diabetes 2023年第8期14卷 1202-1211页

作者： kay Choong see Department of Medicine National University HospitalSingapore 119228Singapore

Inhaled corticosteroids(ICS)and intranasal corticosteroids(INS)are the mainstays of treatment for chronic respiratory diseases like asthma,chronic obstructive pulmonary disease,and allergic *** addition,these localized forms of steroid therapy are generally considered to have fewer systemic side effects compared to long-term oral ***,concern and controversy remain over the impact of ICS and INS on the incidence and control of diabetes mellitus(DM).Given the widespread use of ICS and INS,even small individual effects on DM could lead to large consequences for the global *** large observational studies suggest that high dose ICS is associated with increased incident DM and worsened DM control,though the contribution of other risk factors is less *** addition,only two studies were done to investigate the association of INS and DM,with both studies demonstrating a short-term association of INS use with *** more research evaluating the risk of ICS/INS for DM-related adverse events is needed,high doses of ICS/INS should be avoided when *** following strategies for ICS/INS dose minimization can be considered:Use of non-pharmacological measures(trigger avoidance,smoking cessation,vaccination to avoid infection),control of comorbid conditions,use of non-ICS-containing medications,intermittent rather than regular ICS dosing,and appropriate de-escalation of high ICS doses.

关键词： Beclomethasone Budesonide Fluticasone Glucocorticoids Glucose Hyperglycemia