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Understanding the catalysis of chromium trioxide added magnesium hydride for hydrogen storage and Li ion battery applications

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Journal of Magnesium and Alloys 2024年第3期12卷 1117-1130页

作者： D.Pukazhselvan ihsançaha Catarina de Lemos Sergey M.Mikhalev Francis Leonard Deepak Duncan Paul Fagg Department of Mechanical Engineering TEMA-Centre for Mechanical Technology and AutomationUniversity of AveiroAveiro 3810-193Portugal LASI-Intelligent Systems Associate Laboratory Guimarães 4800-058Portugal Nanostructured Materials Group International Iberian Nanotechnology Laboratory(INL)Avenida Mestre Jose VeigaBraga 4715-330Portugal

This study explores how the chemical interaction between magnesium hydride(MgH_(2))and the additive CrO_(3) influences the hydrogen/lithium storage characteristics of MgH_(2).We have observed that a 5 wt.%CrO_(3) additive reduces the dehydrogenation activation energy of MgH_(2) by 68 kJ/mol and lowers the required dehydrogenation temperature by 80℃.CrO_(3) added MgH_(2) was also tested as an anode in an Li ion battery,and it is possible to deliver over 90%of the total theoretical capacity(2038 mAh/g).Evidence for improved reversibility in the battery reaction is found only after the incorporation of additives with MgH_(2).In depth characterization study by X-ray diffraction(XRD)technique provides convincing evidence that the CrO_(3) additive interacts with MgH_(2) and produces Cr/MgO *** free energy analyses confirm the thermodynamic feasibility of conversion from MgH_(2)/CrO_(3) to MgO/Cr,which is well supported by the identification of Cr(0)in the powder by X ray photoelectron spectroscopy(XPS)*** high resolution transmission electron microscopy(HRTEM)and energy dispersive spectroscopy(EDS)we found evidence for the presence of 5 nm size Cr nanocrystals on the surface of MgO rock salt *** is also convincing ground to consider that MgO rock salt accommodates Cr in the *** observations support the argument that creation of active metal–metal dissolved rock salt oxide interface may be vital for improving the reactivity of MgH_(2),both for the improved storage of hydrogen and lithium.

关键词： Hydrogen storage Rechargeable batteries Binary hydrides Metal oxides Catalytic mechanism.

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A Novel Approach to Energy Optimization:Efficient Path Selection in Wireless Sensor Networks with Hybrid ANN

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Computers, Materials & Continua 2024年第5期79卷 2945-2970页

作者： Muhammad Salman Qamar ihsan ulHaq Amil Daraz Atif MAlamri Salman A.AlQahtani Muhammad Fahad Munir Department of Electrical and Computer Engineering International Islamic UniversityIslamabad44000Pakistan School of Information Science and Engineering NingboTech UniversityNingbo315100China Software Engineering Department College of Computer and Information SciencesKing Saud UniversityRiyadh11495Saudi Arabia Computer Engineering Department College of Computer and Information SciencesKing Saud UniversityRiyadh11495Saudi Arabia

In pursuit of enhancing the Wireless Sensor Networks(WSNs)energy efficiency and operational lifespan,this paper delves into the domain of energy-efficient routing ***,the limited energy resources of Sensor Nodes(SNs)are a big challenge for ensuring their efficient and reliable *** data gathering involves the utilization of a mobile sink(MS)to mitigate the energy consumption problem through periodic network *** mobile sink(MS)strategy minimizes energy consumption and latency by visiting the fewest nodes or predetermined locations called rendezvous points(RPs)instead of all cluster heads(CHs).CHs subsequently transmit packets to neighboring *** unique determination of this study is the shortest path to reach *** the mobile sink(MS)concept has emerged as a promising solution to the energy consumption problem in WSNs,caused by multi-hop data collection with static *** this study,we proposed two novel hybrid algorithms,namely“ Reduced k-means based on Artificial Neural Network”(RkM-ANN)and“Delay Bound Reduced kmeans with ANN”(DBRkM-ANN)for designing a fast,efficient,and most proficient MS path depending upon rendezvous points(RPs).The first algorithm optimizes the MS’s latency,while the second considers the designing of delay-bound paths,also defined as the number of paths with delay over bound for the *** methods use a weight function and k-means clustering to choose RPs in a way that maximizes efficiency and guarantees network-wide *** addition,a method of using MS scheduling for efficient data collection is *** simulations and comparisons to several existing algorithms have shown the effectiveness of the suggested methodologies over a wide range of performance indicators.

关键词： Wireless Sensor Networks(WSNs) mobile sink(MS) rendezvous point(RP) machine learning Artificial Neural Networks(ANNs)

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Low-complexity signal detection for massive MIMO systems via trace iterative method

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Journal of Systems Engineering and Electronics 2024年第3期35卷 549-557页

作者： IMRAN A.Khoso ZHANG Xiaofei ABDUL Hayee Shaikh ihsan A.Khoso ZAHEER Ahmed Dayo College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China School of Electrical Engineering Korea UniversitySeoul 02841Korea School of Mathematics South China University of TechnologyGuangzhou 510641China Department of Computer Science Huanggang Normal UniversityHuanggang 438000China

Linear minimum mean square error(MMSE)detection has been shown to achieve near-optimal performance for massive multiple-input multiple-output(MIMO)systems but inevitably involves complicated matrix inversion,which entails high *** avoid the exact matrix inversion,a considerable number of implicit and explicit approximate matrix inversion based detection methods is *** combining the advantages of both the explicit and the implicit matrix inversion,this paper introduces a new low-complexity signal detection ***,the relationship between implicit and explicit techniques is ***,an enhanced Newton iteration method is introduced to realize an approximate MMSE detection for massive MIMO uplink *** proposed improved Newton iteration significantly reduces the complexity of conventional Newton ***,its complexity is still high for higher ***,it is applied only for first two *** subsequent iterations,we propose a novel trace iterative method(TIM)based low-complexity algorithm,which has significantly lower complexity than higher Newton *** guarantees of the proposed detector are also *** simulations verify that the proposed detector exhibits significant performance enhancement over recently reported iterative detectors and achieves close-to-MMSE performance while retaining the low-complexity advantage for systems with hundreds of antennas.

关键词： signal detection low-complexity linear minimum mean square error(MMSE) massive multiple-input multiple-output(MIMO) trace iterative method(TIM)

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Red cell distribution width-to-albumin ratio is a simple promising prognostic marker in acute cholangitis requiring biliary drainage

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Hepatobiliary & Pancreatic Diseases International 2024年第5期23卷 487-494页

作者： Fatih Acehan Hüseyin Camli Cagdas Kalkan Mesut Tez Burak Furkan Demir Emin Altiparmak ihsan Ates Department of Internal Medicine Ankara City HospitalAnkara 06800Türkiye Department of Gastroenterology Ankara City HospitalAnkara 06800Türkiye Department of General Surgery Ankara City HospitalAnkara 06800Türkiye

Background: It is crucial to assess the severity of acute cholangitis(AC). There are currently several prognostic markers. However, the accuracies of these markers are not satisfied. The present study aimed to investigate the predictive value of the red cell distribution width(RDW)-to-albumin ratio(RAR) for the prognosis of AC. Methods: We retrospectively evaluated consecutive patients diagnosed with AC between May 2019 and March 2022. RAR was calculated, and its predictive ability for in-hospital mortality, intensive care unit(ICU) admission, bacteremia, and the length of hospitalization were analyzed. Results: Out of 438 patients, 34(7.8%) died. Multivariate analysis showed that malignant etiology [odds ratio(OR) = 4.816, 95% confidence interval(CI): 1.936-11.980], creatinine(OR = 1.649, 95% CI: 1.095-2.484), and RAR(OR = 2.064, 95% CI: 1.494-2.851) were independent risk factors for mortality. When adjusted for relevant covariates, including age, sex, malignant etiology, Tokyo severity grading(TSG), Charlson comorbidity index, and creatinine, RAR significantly predicted mortality(adjusted OR = 1.833, 95% CI: 1.280-2.624). When the cut-off of RAR was set to 3.8, its sensitivity and specificity for mortality were 94.1% and 56.7%, respectively. Patients with an RAR of > 3.8 had a 20.9-fold(OR = 20.9, 95% CI: 4.9-88.6) greater risk of mortality than the remaining patients. The area under the curve value of RAR for mortality was 0.835(95% CI: 0.770-0.901), which was significantly higher than that of TSG and the other prognostic markers, such as C-reactive protein-to-albumin ratio, and procalcitonin-to-albumin ratio. Lastly, RAR was not inferior to TSG in predicting ICU admission, bacteremia, and the length of hospitalization. Conclusions: RAR successfully predicted the in-hospital mortality, ICU admission, bacteremia, and the length of hospitalization of patients with AC, especially in-hospital mortality. RAR is a promising marker that is more convenient than TSG and o

关键词： Acute cholangitis Albumin Biliary drainage Mortality Red blood cell distribution width-to-albumin ratio

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怀豆和黑麦草绿肥残体还田对旱地土壤温室气体排放的影响

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干旱地区农业研究 2024年第2期42卷 245-253,263页

作者：谈光野 ihsan Muhammad 杨彩迪王俊西北大学城市与环境学院/陕西省地表系统与环境承载力重点实验室陕西西安710127 陕西省碳中和技术重点实验室陕西西安710127 中国科学院水利部水土保持研究所陕西杨凌712100

以怀豆和黑麦草两种绿肥为对象,分别进行了为期63 d的不同绿肥残体还田量和残体混合比例室内培养试验,其中绿肥残体还田量试验分别设0、1、2、4、6 t·hm^(-2)共5个水平;残体混合比例试验设100%怀豆、25%怀豆+75%黑麦草、50%怀豆+50%黑... 详细信息

以怀豆和黑麦草两种绿肥为对象,分别进行了为期63 d的不同绿肥残体还田量和残体混合比例室内培养试验,其中绿肥残体还田量试验分别设0、1、2、4、6 t·hm^(-2)共5个水平;残体混合比例试验设100%怀豆、25%怀豆+75%黑麦草、50%怀豆+50%黑麦草、75%怀豆+25%黑麦草和100%黑麦草共5个处理,还田量均为4 t·hm^(-2)。采用气相色谱法观测了培养期间土壤温室气体(CO_(2)、N_(2) O、CH_(4))通量变化。结果表明:(1)与未添加绿肥残体相比,绿肥残体还田土壤CO_(2)累积排放通量提高了11.3%~80.2%,土壤N_(2) O排放提高了15.8%~51.1%,综合增温潜势(GWP)提高了11.9%~79.4%(P<0.05)。随绿肥残体还田量的增加,土壤CO_(2)排放通量和综合增温潜势(GWP)均呈线性增加,土壤CH_(4)吸收通量则呈线性下降趋势,而土壤N_(2) O排放通量呈现先增后减趋势,并在还田量约为3 t·hm^(-2)时达到最大。相同还田量下添加黑麦草残体较怀豆残体具有更高的土壤CO_(2)排放和CH_(4)吸收,而添加怀豆残体较黑麦草残体显著促进了土壤N_(2) O排放;(2)土壤温室气体累计通量与绿肥残体混合物中黑麦草比例存在线性相关,随黑麦草添加比例的提高,土壤CO_(2)排放通量显著增加了5.8%~19.7%(P<0.05),GWP显著增加了5.3%~17.7%(P<0.05),而N_(2) O排放通量显著下降了11.2%~41.5%(P<0.05),CH_(4)吸收通量则显著下降了13.4%~50.9%(P<0.05)。综合来看,选择非豆科作物比例较低的绿肥残体,并以较低生物量进行还田,能在保持低GWP的同时获得生态效益。

关键词：怀豆黑麦草绿肥残体还田温室气体排放综合增温潜势

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Study on Employees' Adoption of Artificial Intelligence in Pakistan Banking Sector

Study on Employees' Adoption of Artificial Intelligence in P...

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作者： Uddin ihsan 山东财经大学

学位级别：硕士

The rapid pace of technological evolution is reshaping the landscape of business operations,prompting organizations to invest substantially in digital innovations such as artificial intelligence(AI)to maintain ***,the banking sector has emerged as an early adopter of AI technologies,reflecting its proactive stance toward technological *** the banking industry navigates through accelerated technological shifts,this research endeavors to explore the intention of employees within the Pakistan banking sector to embrace *** upon qualitative interviews with banking personnel,grounded theory approach was employed to identify five critical factors shaping AI adoption: perceived usefulness,perceived ease of use,personal well-being concern,personal development concern,and top management ***,a conceptual model was proposed by extending the Technology Acceptance Model(TAM)*** a quantitative approach,Structural Equation Modeling(SEM)was applied to analyze data collected from a sample of 255 employees across multiple banks in *** findings underscore the direct impact of all identified factors on AI adoption,albeit with varying degrees of ***,personal development concern and personal well-being concern were found to exert a negative influence on employees' intention to adopt AI,aligning with the formulated *** findings hold significant implications for organizations seeking to assess their workforce's readiness for AI *** illuminating the key factors influencing AI adoption,this study provides valuable insights for organizations striving to navigate the evolving technological landscape effectively.

关键词： Artificial Intelligence AI Adoption TAM Model Banking sector AI Technologies

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Circulating tumor DNA and its role in detection, prognosis and therapeutics of hepatocellular carcinoma

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Chinese Journal of Cancer Research 2024年第2期36卷 195-214页

作者： Sana Rashid Yingchuan Sun Umair Ali Khan Saddozai Sikandar Hayyat Muhammad Usman Munir Muhammad Usman Akbar Muhammad Babar Khawar Zhiguang Ren Xinying Ji Malik ihsan Ullah Khan Institute of Molecular Biology and Biotechnology University of LahoreLahore 54590Pakistan Department of Internal Oncology(Section Ⅰ) Xuchang Municipal Central HospitalXuchang 461000China Institute of Translational Medicine Medical CollegeYangzhou UniversityYangzhou 225001China Australian Institute for Bioengineering&Nanotechnology the University of QueenslandBrisbane 4072Australia Gomal Center of Biochemistry and Biotechnology Gomal UniversityDera Ismail Khan 29111Pakistan Applied Molecular Biology and Biomedicine Lab Department of ZoologyUniversity of NarowalNarowal Punjab 51600Pakistan Kaifeng Municipal Key Laboratory for Infection and Biosafety Henan International Joint Laboratory of Nuclear Protein RegulationSchool of Basic Medical SciencesHenan UniversityKaifeng 475004China Faculty of Basic Medical Subjects Shu-Qing Medical College of ZhengzhouZhengzhou 450064China Department of Medicine Huaxian County People's HospitalHuaxian 456400China

Hepatocellular carcinoma(HCC) is considered the fifth most prevalent cancer among all types of cancers and has the third most morbidity value. It has the most frequent duplication time and a high recurrence rate. Recently, the most unique technique used is liquid biopsies, which carry many markers;the most prominent is circulating tumor DNA(ctDNA). Varied methods are used to investigate ctDNA, including various forms of polymerase chain reaction(PCR) [emulsion PCR(ePCR), digital PCR(dPCR), and bead, emulsion, amplification, magnetic(BEAMing) PCR]. Hence ctDNA is being recognized as a potential biomarker that permits early cancer detection,treatment monitoring, and predictive data on tumor burden are subjective to therapy or surgery. Numerous ctDNA biomarkers have been investigated based on their alterations such as 1) single nucleotide variations(either insertion or deletion of a nucleotide) markers including TP53, KRAS, and CCND1;2) copy number variations which include markers such as CDK6, EFGR, MYC and BRAF;3) DNA methylation(RASSF1A, SEPT9, KMT2C and CCNA2);4) homozygous mutation includes ctDNA markers as CDKN2A, AXIN1;and 5) gain or loss of function of the genes, particularly for HCC. Various researchers have conducted many studies and gotten fruitful ***, there are some drawbacks to ctDNA namely low quantity, fragment heterogeneity, less stability, limited mutant copies and standards, and differential sensitivity. However, plenty of investigations demonstrate ctDNA's significance as a polyvalent biomarker for cancer and can be viewed as a future diagnostic, prognostic and therapeutic agent. This article overviews many conditions in genetic changes linked to the onset and development of HCC, such as dysregulated signaling pathways, somatic mutations, single-nucleotide polymorphisms, and genomic instability. Additionally, efforts are also made to develop treatments for HCC that are molecularly targeted and to unravel some of the genetic pathways that f

关键词： Hepatocellular carcinoma circulating tumor DNA biomarkers single nucleotide variations diagnosis prognosis

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电化学分析方法在中药质量控制中的研究进展

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分析化学 2024年第1期52卷 22-34页

作者：潘彦冰 Awais ihsan 施敏马雯雯 Ghulam MURTAZA 胡克菲李竣黄先菊程寒中南民族大学药学院伊斯兰堡COMSATS大学生物科技学院伊斯兰堡COMSATS大学药学院元莱健康产品(武汉)有限公司国家中医药管理局民族药学三级实验室

中药质量控制是保证中药现代化、产业化以及国际化的核心问题。与其它分析方法相比，电化学分析法具有灵敏度高、检测速度快和成本低等优点，是中药质量控制的重要手段，具有广阔的发展前景。本文综述了近年来电化学方法在中药质量控制... 详细信息

中药质量控制是保证中药现代化、产业化以及国际化的核心问题。与其它分析方法相比，电化学分析法具有灵敏度高、检测速度快和成本低等优点，是中药质量控制的重要手段，具有广阔的发展前景。本文综述了近年来电化学方法在中药质量控制方面的研究进展，介绍了电化学指纹图谱技术在中药鉴别方面的研究概况，着重归纳了电化学技术在分析中药有效成分和有害物质中的应用，包括黄酮类、生物碱类、醌类、苷类、重金属和农药残留等，并展望了电化学方法在中药质量控制领域的发展前景。

关键词：电化学方法指纹图谱中药质量控制评述

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基于Eshelby夹杂理论高温冻土累积塑性应变修正模型

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内蒙古工业大学学报（自然科学版） 2024年第4期43卷 368-372页

作者：任戈刘俊芳刘鸿飞白瑞刚 ihsan Ullal 内蒙古工业大学土木工程学院呼和浩特010051 内蒙古工业大学沙旱区地质灾害与岩土工程防御自治区高等学校重点实验室呼和浩特010051

针对不同黏粒含量的高温冻土,基于Eshelby夹杂理论分析了冰含量与等效变形模量之间的关系,在此基础上引入模量比对现有的Monismith累积塑性应变模型进行修正,得到了一种新的高温冻土累积塑性变形预测模型,并采用室内试验结果进行验证。... 详细信息

针对不同黏粒含量的高温冻土,基于Eshelby夹杂理论分析了冰含量与等效变形模量之间的关系,在此基础上引入模量比对现有的Monismith累积塑性应变模型进行修正,得到了一种新的高温冻土累积塑性变形预测模型,并采用室内试验结果进行验证。结果显示:模型数据与试验数据具有较好的吻合度。新提出的修正Monismith累积塑性应变预测模型表征了冰含量与土体变形模量之间的关系,其可以较准确地模拟高温冻土整个动应变过程,并且能够反映组构变化所诱发的高温冻土累积变形特征的不同。

关键词：高温冻土累积塑性应变模型车辆荷载 Eshelby夹杂理论

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基于纳米金修饰碳纤维微电极的电化学法测定黄芩素

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中南民族大学学报（自然科学版） 2024年第3期43卷 344-349页

作者：马雯雯谭樟斌潘彦冰胡克菲 AWAIS ihsan 程寒中南民族大学药学院武汉430074 中南民族大学国家中医药管理局民族药学三级实验室武汉430074 元莱健康产品(武汉)有限公司武汉430050 伊斯兰堡COMSATS大学生物科技学院巴基斯坦萨希瓦尔63354

利用柠檬酸三钠还原氯金酸的方法制得小粒径的纳米金颗粒(AuNPs),采用电化学沉积法将其修饰在碳纤维电极(CFME)表面,基于电化学法构建了一种灵敏度高、抗干扰性良好的测定黄芩素的微型电化学传感器.采用透射电镜、紫外分光光度法、扫描... 详细信息

利用柠檬酸三钠还原氯金酸的方法制得小粒径的纳米金颗粒(AuNPs),采用电化学沉积法将其修饰在碳纤维电极(CFME)表面,基于电化学法构建了一种灵敏度高、抗干扰性良好的测定黄芩素的微型电化学传感器.采用透射电镜、紫外分光光度法、扫描电镜等对电极及修饰材料进行表征,运用差分脉冲法、循环伏安法、电化学阻抗谱法考查了黄芩素在电极修饰前后的电化学性质,并优化了扫速、缓冲液pH、电沉积时间等实验条件.实验结果表明,AuNPs对黄芩素具有显著的电催化性能,AuNPs/CFME对黄芩素表现出良好的电化学响应,最佳修饰时间为10 min.黄芩素浓度在0.05~10μmol/L时,其氧化峰电流与浓度呈良好的线性关系,线性方程为I_(p)(nA)=0.4409C(μmol/L)+0.7066,R^(2)=0.998.该方法响应速度快、稳定性较好,可用于黄芩素的定量检测.

关键词：纳米金碳纤维微电极修饰电极黄芩素

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