检索结果-南通市图书馆

Chinese Journal of Chemical Engineering 2018年第9期26卷 1904-1911页

作者： Anis H.Fakeeha Ahmed S.Al-Fatesh Biswajit Chowdhury Ahmed A.Ibrahim Wasim U.Khan shahid hassan Kasim Sasudeen Ahmed Elhag Abasaeed Chemical Engineering Department College of Engineering King Saud University Department of Applied Chemistry Indian School of Mines

Methane decomposition reaction has been studied at three different activation temperatures（500℃,800℃ and950℃）over mesoporous alumina supported Ni–Fe and Mn–Fe based bimetallic *** co-impregnation of Ni on Fe/Al2O3the activity of the catalyst was retained even at the high activation temperature at 950℃ and up to180 *** Ni promotion enhanced the reducibility of Fe/Al2O3oxides showing higher catalytic activity with a hydrogen yield of 69%.The reactivity of bimetallic Mn and Fe over Al2O3catalyst decreased at 800℃ and 950℃ activation *** studies revealed that the catalyst could be effectively recycled up to *** addition of O2（1 ml,2 ml,4 ml）in the feed enhanced substantially CH4conversion,the yield of hydrogen and the stability of the catalyst.

关键词： Carbon nanotube Hydrogen production Methane decomposition Manganese promoter Nickel promoter

Comparison of biomechanical indices measured by ocular response analyzer between children and elderly:a systematic review

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2025年第1期18卷 154-159页

作者： hassan Hashemi Fereshteh Shokrollahzadeh Hadi Ostadimoghaddam Abbasali Yekta Mehdi Khabazkhoob Noor Ophthalmology Research Center Noor Eye HospitalTehran ***Iran Rehabilitation Research Center Department of OptometrySchool of Rehabilitation SciencesIran University of Medical SciencesTehran ***Iran Refractive Errors Research Center Mashhad University of Medical SciencesMashhad ***Iran Department of Optometry School of Paramedical SciencesMashhad University of Medical SciencesMashhad ***Iran Department of Medical Surgical Nursing School of Nursing and MidwiferyShahid Beheshti University of Medical SciencesTehran ***Iran

Biomechanical study of the visual system by ocular response analyzer investigates the inter-structural biological relationships,mechanics,and function of the visual *** review aimed to investigate the changes in corneal biomechanical parameters with age and *** articles published in PubMed between 2000 and 2021 were investigated and critiqued,and valid scientific evidence was collected,reviewed and concluded according to the inclusion and exclusion *** studies showed that corneal biomechanical changes occur infrequently in children up to the age of 20y,and with increasing age and wider age range,there was a significant decrease in corneal biomechanical indices,especially corneal *** children and adults,most studies have shown that these biomechanical indicators,especially corneal resistance factor,were higher in *** hormonal changes may contribute to this finding,the role of axial length and other biometric indicators should not be *** axial length,the intraocular pressure,and the corneal thickness are other factors associated with biomechanical parameters that should be taken into account in clinical diagnosis and management especially for patients undergoing refractive surgery as well as keratoconus patients.

关键词： ocular response analyzer corneal biomechanics visual function children elderly

Topographic factors associated with anterior chamber angle narrowing in patients with keratoconus

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2025年第1期18卷 67-73页

作者： Hamed Soltan-Dehghan Abdollah Farzaneh hassan Hashemi Payam Nabovati Mehdi Khabazkhoob Rehabilitation Research Center Department of OptometrySchool of Rehabilitation SciencesIran University of Medical SciencesTehran ***Iran Noor Ophthalmology Research Center Noor Eye HospitalTehran ***Iran Department of Medical Surgical Nursing School of Nursing and MidwiferyShahid Beheshti University of Medical SciencesTehran ***Iran

AIM:To identify topographic determinants of the anterior chamber angle(ACA)in patients with keratoconus(KCN).METHODS:Four hundred and ten eyes of 294 patients with KCN were recruited for this ***,complete ocular examinations were performed for all patients,including visual acuity measurement,refraction,and slit-lamp ***,all participants underwent corneal imaging by the Oculus Pentacam ***:The mean age of the participants was 32.40±8.52y(15-60y)and 69.5%of them were *** mean ACA was 38.47°±5.75°(range:14.40°to 56.50°)in the whole sample,38.24°±6.00°in males,and 38.98°±5.11°in females(P=0.447).The mean ACA was significantly different among different groups of cone morphology,as patients with nipple cones showed the lowest mean ***,there were statistically significant differences in the mean ACA among different groups of cone locations,with patients having central cones exhibiting the lowest mean ACA(P<0.001).Anterior and posterior Q values were significantly,directly correlated with ACA(anterior Q:r=0.122,P=0.014,posterior Q:r=0.192,P<0.001).CONCLUSION:This study provides critical insights into the risk factors for ACA narrowing in KCN patients,which is essential for planning intraocular *** with nipple and central cones exhibited the most significant ACA ***,more negative Q-values are associated with increased ACA narrowing,highlighting the need for targeted diagnostic and therapeutic strategies.

关键词： keratoconus anterior chamber angle cone morphology cone location

Comparative analysis of CO_(2)emissions and economic performance in the United States and China:Navigating sustainable development in the climate change era

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geoscience Frontiers 2024年第5期15卷 239-255页

作者： Khalid Mehmood Syed Tauseef hassan Xuchun Qiu shahid Ali Institute of Environmental Health and Ecological Security School of the Environment and Safety EngineeringJiangsu UniversityZhenjiangJiangsu 212013China Department of Trade and Finance Faculty of Economics and ManagementCzech University of Life Sciences PragueKamycka 129PrahaZIP 16500Czechia School of Economics and Management Anhui Polytechnic UniversityWuhu 241000China Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment Suzhou University of Science and TechnologySuzhou 215009China

Economic growth has brought a global climate change into the spotlight,and CO_(2)emissions demonstrate significant challenges in reducing environmental shifts ***,the United States and China contribute the largest amount of CO_(2)*** purpose of this study is to examine the relationship between different types of CO_(2)emissions and economic growth by using a modeling *** analyze total CO_(2)emissions,coal CO_(2)emissions,oil CO_(2)emissions,the global share of coal CO_(2)emissions,the global share of oil CO_(2)emissions,and economic *** study provides unique insights into how to simultaneously reduce CO_(2)emissions and sustain economic growth.A bootstrap autoregressive distributed lag(BARDL)simulation method is utilized to examine the long-and short-run effects of predictors on CO_(2)*** CO_(2)emissions are found to have a significant positive effect on economic growth in the short run but a negative impact on economic growth over the long run in the United *** United States needs to implement stronger measures to balance coal CO_(2)emissions with economic growth for sustainable *** contrast,oil CO_(2)emissions have positive effect for China in both the long run and short ***,China can continue to reduce CO_(2)emissions from oil while maintaining positive economic *** China’s policies promoting cleaner energy alternatives can be adapted and implemented to maintain a balance between economic growth and carbon *** study has valuable insights for policymakers seeking to balance economic growth with carbon reduction *** emphasizes the need to better understand the complex relationship between CO_(2)emissions and economic growth.

关键词： CO_(2)emission Sustainable development Climate change United States China BARDL

Theoretical investigation of optical properties and band gap engineering for Zn1-xTMxTe(TM=Fe,Co)alloys by modified Becke-Johnson potential

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2017年第8期26卷 491-498页

作者： Q Mahmood M Yaseen M hassan shahid M Ramay Asif Mahmood Materials Growth and Simulation Laboratory Department of PhysicsUniversity of the PunjabQuaid-i-Azam Campus54590LahorePakistan Department Of Physlcs University of Agriculture UniversityFaisalabad 38040Pakistan Physics and Astronomy Department College of ScienceKing Sand UniversityRiyadhSaudi Arabia Chemical Engineering Department College of EngineeringKing Saud UniversityRiyadhSaudi Arabia

The direct band gap ZnTe with transition metal （TM） impurities plays a vital role in optoelectronic and spintronic applications. In the present study, we use the advanced modified Becke-Johnson （mBJ） functional for performing the structural computations and detailed investigations of the optical characters in Zn1_xTMxTe （TM = Fe, Co） alloys with 0 ≤ x ≤1. By employing the FP-LAPW method, we determine various optical parameters for the ternary alloys and for the end binaries. The calculated static dielectric constants and optical band gaps for Zn1_xTMxTe （TM = Fe, Co） have an inverse relation that verifies the Penn model. We find that the static dielectric constant is nearly equal to the square of the static refractive index, and both increase with TM content. Furthermore, we also find a slight shift of peaks to a higher energy region with increasing TM concentration. The decreasing band gap and high value of the absorption in the visible region of electromagnetic spectrum make these alloys suitable for photonic and solar cell applications.

关键词： amorphous semiconductors transition metal-doped ZnTe structural computation optical property

Autorefraction versus subjective refraction in high astigmatism

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2025年第3期18卷 504-509页

作者： Haleh Kangari hassan Hashemi Saeed Rahmani Elnaz Ahmadian Abbasali Yekta Mehdi Khabazkhoob Department of Optometry School of RehabilitationShahid Beheshti University of Medical SciencesTehran ***Iran Noor Ophthalmology Research Center Noor Eye HospitalTehran ***Iran Noor Research Center for Ophthalmic Epidemiology Noor Eye HospitalTehran ***Iran Refractive Errors Research Center Mashhad University of Medical SciencesMashhad ***Iran Department of Medical Surgical Nursing School of Nursing and MidwiferyShahid Beheshti University of Medical SciencesTehran ***Iran

AIM:To compare the subjective refraction data with autorefraction findings in high ***:In a cross-sectional study,sampling was done from in different geographic regions in Iran using a multistage random cluster sampling *** study participants underwent cycloplegic auto-refraction and subjective refraction using the red-green ***:In this study,277 eyes of 158 students aged 8 to 15y were *** to the results,the mean difference between subjective refraction and autorefraction in measuring sphere,cylinder,spherical equivalent,J0,and J45 was-0.18±0.76,-0.36±0.40,-0.36±0.79,0.15±0.20,and 0.05±0.21 *** correlation of these two refraction methods in measuring the aforementioned indices was 0.963,0.898,0.960,0.931,and 0.948 *** 95%limits of agreement of the two methods in measuring the above indices were-1.66 to 1.31,-1.14 to 0.42,-1.91 to 1.19,-0.24 to 0.54,and-0.36 to 0.47 *** agreement between the two methods decreased with increasing cylinder power,and the best agreement was found in myopic ***:The measurements obtained by autorefractometer have a significantly higher cylinder average compared to subjective ***,in the cylinder range of 4–5 diopters,the values of J0 and J45 do not have a high correlation.

关键词： subjective refraction autorefraction astigmatism

Revisiting traditional and modern trends in versatile 2D nanomaterials: Synthetic strategies, structural stability, and gas-sensing fundamentals

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2023年第12期12卷 2149-2246页

作者： Mobashar hassan Siwei Liu Zhiping Liang shahid Hussain Junlin Liu Guiwu Liu Guanjun Qiao School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China

Two-dimensional nanomaterials(2DNMs)have attracted significant research interest due to their outstanding structural properties,which include unique electrical nanostructures,large surface areas,and high surface *** adaptable materials have outstanding physicochemical characteristics,making them useful in a variety of applications such as gas-sensing,electronics,energy storage,and *** research has been conducted in the pursuit of high performance room-temperature(RT)gas sensors with good selectivity,high sensitivity,long-term stability,and rapid response/recovery *** oxides,transition metal chalcogenides,MXenes,graphene,phosphorene,and boron nitride have all been discovered as 2DNMs with strong potential for gas *** review presents an in-depth analysis of current advances in 2DNM *** includes synthetic techniques,structural stabilities,gas-sensing mechanisms,critical performance parameters,and factors influencing gas-sensing capabilities of ***,the present study emphasizes structural engineering and optimization methodologies that improve gas-sensing *** also highlights current challenges and outlines future research directions in the domain of tailoring 2DNMs for advanced RT gas *** systematically designed comprehensive review article aims to provide readers with profound insights into gas detection,thereby inspiring the generation of innovative ideas to develop cutting-edge 2DNMs-based gas sensors.

关键词： 2D nanomaterials synthetic strategies structural stability gas-sensing mechanism

Benchmarking Performance of Document Level Classification and Topic Modeling

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第4期71卷 125-141页

作者： Muhammad shahid Bhatti Azmat Ullah Rohaya Latip Abid Sohail Anum Riaz Rohail hassan Department of Computer Science COMSATS University IslamabadLahorePakistan Department of Communication Technology and Network Faculty of Computer ScienceUniversiti Putra MalaysiaSelangor43400Malaysia Othman Yeop Abdullah Graduate School of Business(OYAGSB) Universiti Utara Malaysia(UUM)Kuala Lumpur50300Malaysia

Text classification of low resource language is always a trivial and challenging *** paper discusses the process of Urdu news classification and Urdu documents *** is one of the most famous spoken languages in *** implementation of computational methodologies for text classification has increased over ***,Urdu language has not much experimented with research,it does not have readily available datasets,which turn out to be the primary reason behind limited research and applying the latest methodologies to the *** overcome these obstacles,a mediumsized dataset having six categories is collected from authentic Pakistani news *** is a rich but complex *** processing can be challenging for Urdu due to its complex features as compared to other *** frequency-inverse document frequency(TFIDF)based term weighting scheme for extracting features,chi-2 for selecting essential features,and Linear discriminant analysis(LDA)for dimensionality reduction have been *** matrix and cosine similarity measure have been used to identify similar documents in a collection and find the semantic meaning of words in a document FastText model has been *** training-test split evaluation methodology is used for this experimentation,which includes 70%for training data and 30%for testing ***-of-the-art machine learning and deep dense neural network approaches for Urdu news classification have been ***,we trained Multinomial Naïve Bayes,XGBoost,Bagging,and Deep dense neural *** and deep dense neural network outperformed the other *** experimental results show that deep dense achieves 92.0%mean f1 score,and Bagging 95.0%f1 score.

关键词： Deep neural network machine learning natural language processing TFIDF sparse matrix cosine similarity classification linear discriminant analysis gradient boosting

A systematic mapping to investigate the application of machine learning techniques in requirement engineering activities

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CAAI Transactions on Intelligence Technology 2024年第6期9卷 1412-1434页

作者： Shoaib hassan Qianmu Li Khursheed Aurangzeb Affan Yasin Javed Ali Khan Muhammad shahid Anwar School of Computer Science and Engineering Nanjing University of Science and TechnologyNanjingJiangsuChina Department of Computer Engineering College of Computer and Information SciencesKing Saud UniversityRiyadhSaudi Arabia School of Software Northwestern Polytechnical UniversityXianShaanxiChina Department of Computer Science School of PhysicsEngineering&Computer ScienceUniversity of HertfordshireHatfieldUK Department of AI and Software Gachon University Seongnam-siSeongnamSouth Korea

Over the past few years,the application and usage of Machine Learning(ML)techniques have increased exponentially due to continuously increasing the size of data and computing *** the popularity of ML techniques,only a few research studies have focused on the application of ML especially supervised learning techniques in Requirement Engineering(RE)activities to solve the problems that occur in RE *** authors focus on the systematic mapping of past work to investigate those studies that focused on the application of supervised learning techniques in RE activities between the period of 2002–*** authors aim to investigate the research trends,main RE activities,ML algorithms,and data sources that were studied during this ***-five research studies were selected based on our exclusion and inclusion *** results show that the scientific community used 57 *** those algorithms,researchers mostly used the five following ML algorithms in RE activities:Decision Tree,Support Vector Machine,Naïve Bayes,K-nearest neighbour Classifier,and Random *** results show that researchers used these algorithms in eight major RE *** activities are requirements analysis,failure prediction,effort estimation,quality,traceability,business rules identification,content classification,and detection of problems in requirements written in natural *** selected research studies used 32 private and 41 public data *** most popular data sources that were detected in selected studies are the Metric Data Programme from NASA,Predictor Models in Software Engineering,and iTrust Electronic Health Care System.

关键词： data sources machine learning requirement engineering supervised learning algorithms

Household behavior in practicing mental budgeting based on the theory of planned behavior

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Financial Innovation 2018年第1期4卷 408-421页

作者： Ume Habibah Ibne hassan Muhammad shahid Iqbal Naintara Department of Management Sciences Air University Multan CampusMultanPakistan Department of Commerce Bahauddin Zakariya UniversityMultanPakistan. Bahauddin Zakariya University MultanPakistan.

Ajzen’s theory of planned behavior(TPB)suggests that planned behavior is determined by behavioral *** extensive literature based on TPB,household mental budgeting behavior explained by TPB is *** current study empirically tested TPB factors in light of mental budgeting *** hypothesized model was tested using partial least squares structural equation modeling(PLS-SEM).PLS-SEM was employed using a Likert-scaled questionnaire administered to 275 *** results indicate that mental budgeting attitude and mental budgeting past behavior strongly predict mental budgeting intention,and mental budgeting intention predicts mental budgeting ***,mental budgeting intention partially mediates the relationship between mental budgeting attitude and mental budgeting behavior,and mental budgeting past behavior and mental budgeting *** study contributes to the academic interest in theoretical progress in household behavior.

关键词： Mental budgeting behavior Household budgeting behavior Mental budgeting attitude Mental budgeting past behavior Mental budgeting intention