检索结果-南通市图书馆

Predicting potential invasion risks of Leucaena leucocephala(Lam.)de Wit in the arid area of saudi Arabia

Journal of Arid Land 2024年第7期16卷 983-999页

作者： haq s marifatul Darwish MOHAMMED Waheed MUHAMMAD Kumar MANOJ siddiqui H MANZER Bussmann W RAINER Department of Ethnobotany Institute of BotanyIlia State UniversityTbilisi 0162Georgia The Centre of Excellence on sustainable Land Management(CoE-sLM) Indian Council of Forestry Research and EducationDehradun 248006India Department of Botany and Microbiology College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Department of Botany State Museum for Natural HistoryKarlsruhe 76133Germany

The presence of invasive plant species poses a substantial ecological impact,thus comprehensive evaluation of their potential range and risk under the influence of climate change is *** study uses maximum entropy(MaxEnt)modeling to forecast the likelihood of Leucaena leucocephala(Lam.)de Wit invasion in saudi Arabia under present and future climate change *** the MaxEnt modeling,we integrated climatic and soil data to predict habitat suitability for the invasive *** conducted a detailed analysis of the distribution patterns of the species,using climate variables and ecological *** focused on the important influence of temperature seasonality,temperature annual range,and precipitation *** distribution modeling used robust measures of area under the curve(AUC)and receiver-operator characteristic(ROC)curves,to map the invasion extent,which has a high level of accuracy in identifying appropriate *** complex interaction that influenced the invasion of *** was highlighted by the environmental parameters using Jackknife ***,the actual geographic area where *** was found in saudi Arabia was considerably smaller than the theoretical maximum range,suggesting that it had the capacity to expand *** MaxEnt model exhibited excellent prediction accuracy and produced reliable results based on the data from the ROC *** and temperature were the primary factors influencing the potential distribution of ***,an estimated area of 216,342 km^(2)in saudi Arabia was at a high probability of invasion by *** investigated the potential for increased invasion hazards in the future due to climate change scenarios(shared socioeconomic Pathways(ssPs)245 and 585).The analysis of key climatic variables,including temperature seasonality and annual range,along with soil properties such as clay composition and nitrogen content,unveiled their substanti

关键词： area under the curve invasive species invasion risks climate change MaxEnt model

来源：

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

Quantitative analysis of saindha salt using laser induced breakdown spectroscopy and cross-validation with ICP-Ms

引用

Plasma science and Technology 2020年第7期22卷 51-58页

作者： M QAsIM M ANWAR-UL-haq M sHER AFGAN s U haq M A BAIG Department of Physics University of SargodhaSargodha 40100Pakistan Department of Energy&Power Engineering Tsinghua-BP Clean Energy CenterTsinghua UniversityBeijing 100084People’s Republic of China National Institute of Lasers and Optronics(NILOP) NiloreIslamabad 45650Pakistan National Center for Physics Quaid-i-Azam University CampusIslamabad 45320Pakistan

saindha salt is considered to be more advantageous than the other edible salts for the patients suffering from diabetes,blood pressure and kidney *** explore the constituent elements of this salt,laser induced breakdown spectroscopy(LIBs) has been exploited for its qualitative and quantitative *** third harmonic(355 nm) of a Q-switched Nd:YAG laser has been used to produce the saindha salt plasma and the time integrated optical emission spectra were registered using a set of six miniature spectrometers covering the spectral range of 230-805 *** spectroscopic analysis of the emission spectra predominately revealed numerous neutral or singly ionized emission lines of Ca,Mg,Na,K,Fe,sr,si,Li and *** laser produced plasma was characterized by calculating the electron temperature from the Boltzmann plots and the electron number density from the stark broadened line profile as a function of laser irradiance and distance from the target *** relative concentration of the constituent elements was extracted by the integrated line intensities of the strongest spectral line of each element using the self-calibration-LIBs(sC-LIBs) and one-line calibration free-LIBs(OLCF-LIBs) *** cross-validation,the LIBs results have been compared with that obtained from the inductively coupled plasma-mass spectroscopy(ICP-Ms) showing good agreement.

关键词： elemental analysis CF-LIBs plasma parameters

来源：

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

Evaluation of antidepressant activity of methanolic and hydroalcoholic extracts of Acorus calamus *** through tail suspension test and forced swimming test of mice

引用

Journal of Traditional Chinese Medical sciences 2020年第3期7卷 301-307页

作者： shaista Yousuf shiekh marifatul haq Akhtar Rasool Muhammad Zulfajri Marlia Mohd Hanafiah Huda Nafees shoeiba Tasneem Mohammed Mahboob Department of Pharmacology University of KashmirJammu and Kashmir190006India Department of Botany University of Kashmir SrinagarJammu and Kashmir190006India Department of Environmental sciences Osmania UniversityHyderabadTelangana500007India Department of Chemistry Education Serambi Mekkah UniversityBanda Aceh23245Indonesia Department of Earth sciences and Environment Faculty of Science and TechnologyThe National University of MalaysiaBangi43600Malaysia Center for Tropical Climate Change system Institute of Climate ChangeThe National University of MalaysiaBangi43600Malaysia Faculty of Unani Medicine Department of SaidlaAligarh Muslim UniversityAligarh202002India Department of Zoology Osmania UniversityHyderabadTelangana500007India Applied Biology Division CSIR-Indian Institute of Chemical TechnologyHyderabad500007India

Objective:Acorus calamus(AC)L.(Araceae)is an annual semi-aquatic and aromatic plant found in Europe,North America and *** rhizomes are often used by Native Americans,Americans,and Chinese as well as by other *** studies and documents have shown their use in various disease treatments,such as insomnia,mental disorders,diabetes mellitus,epilepsy,inflammation,asthma,neuropathic pain,and *** this study,the antidepressant activity of methanolic and hydroalcoholic extracts of the AC rhizome part in mice was ***:Three doses of methanolic extract of AC rhizome(MEACR)(25,50 and 100 mg/kg ***),three doses of hydroalcoholic extract of AC rhizome(HAACR)(100,200 and 400 mg/kg ***),and standards(imipramine,15 mg/kg *** and fluoxetine,20 mg/kg ***)was daily oral administration to the mice for consecutive 14 *** extract effect on the immobility time was monitored by a tail suspension test(TsT)and a forced swimming test(FsT).Monoamine oxidase(MAO)levels were also analyzed using standard ***:The optimum antidepressant activity was viewed at 100 mg/kg *** of MEACR extract and400 mg/kg *** of HAACR extract with 23.82%and 20.59%immobility period reduction,***,the extracts weakened the FsT-induced elevation of MAO activity significantly and returned to near-normal levels of neurotransmitters in the brain.100 mg/kg *** or above of MEACR extract significantly prevented the MAO-A and MAO-B activities in mice brain at a dose-dependent ***,just 400 mg/kg *** of HAACR extract prevented the activity of MAO-A and *** and imipramine showed a tendency to prevent the activity of MAO-A and ***:This study suggests that AC rhizome extract mediated antidepressant activity by modulating the central neurochemical and hypothalamic-pituitary-adrenal(HPA)axis in response to FsT and TsTinduced ***,AC rhizome extract can be used as a valuable plant supplement to treat depr

关键词： Acorus calamus Rhizome Antidepressant activity Methanolic extract Hydroalcoholic extract Tail suspension test Forced swim test Monoamine oxidase Mice

来源：

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

structural,electronic,and magnetic properties of Co-doped ZnO

引用

Chinese Physics B 2012年第9期21卷 414-421页

作者： Bakhtiar Ul haq A. Afaq R. Ahmed s. Naseem Center of Excellence in solid state Physics University of the Punjab Quid-e-Azam CampusLahore-54590 Pakistan Department of Physics Faculty of Science Universiti Teknologi Malaysia Skudai Johar Malaysia Center of Excellence in solid state Physics University of the Punjab Quid-e-Azam Campus Lahore-54590 Pakistan

Density functional theory based calculations have been carried out to study structural, electronic, and magnetic properties of Znl-xCoxO （x = 0, 0.25, 0.50, 0.75） in the zinc-blende phase, and the generalized gradient approximation proposed by Wu and Cohen has been used. Our calculated lattice constants decrease while the bulk moduli increase with the increase of Co2＋ concentration. The calculated spin polarized band structures show the metallic behavior of Co-doped ZnO for both the up and the down spin cases with various doping concentrations. Moreover, the electron population is found to shift from the Zn-O bond to the Co-O bond with the increase of Co2~ concentration. The total magnetic moment~ the interstitial magnetic moment, the valence and the conduction band edge spin splitting energies, and the exchange constants decrease, while the local magnetic moments of Zn, Co, O, the exchange spin splitting energies, and crystal field splitting energies increase with the increase of dopant concentration.

关键词： density functional theory magnetic semiconductors generalized gradient approximation

来源：

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

Planetscope Nanosatellites Image Classification Using Machine Learning

引用

Computer systems science & Engineering 2022年第9期42卷 1031-1046页

作者： Mohd Anul haq Department of Computer science College of Computer and Information SciencesMajmaah UniversityALMajmaah11952Saudi Arabia

To adopt sustainable crop practices in changing climate, understandingthe climatic parameters and water requirements with vegetation is crucial on aspatiotemporal scale. The Planetscope (Ps) constellation of more than 130 nanosatellites from Planet Labs revolutionize the high-resolution vegetation assessment. Ps-derived Normalized Difference Vegetation Index (NDVI) maps areone of the highest resolution data that can transform agricultural practices andmanagement on a large scale. High-resolution Ps nanosatellite data was utilizedin the current study to monitor agriculture’s spatiotemporal assessment for theAl-Qassim region, Kingdom of saudi Arabia (KsA). The time series of NDVIwas utilized to assess the vegetation pattern change in the study area. The currentstudy area has sparse vegetation, and exposed soil exhibits brightness due to lowsoil moisture, constraining NDVI. Therefore, a machine learning (ML) basedRandom Forest (RF) classification model was used to compare the vegetationextent and computational cost of NDVI. The RF model has been compared withNDVI in the current investigation. It is one of the most precise classificationmethods because it can model the complexity of input variables, handle outliers,treat noise effectively, and avoid overfitting. Multinomial Logistic Regression(MLR) was implemented to compare the performance of both NDVI and RFbased classification. RF model provided good accuracy (98%) for all vegetationclasses based on user accuracy, producer accuracy, and kappa coefficient.

关键词： Planetscope nanosatellites classification logistic regression computer vision

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CDLsTM: A Novel Model for Climate Change Forecasting

引用

Computers, Materials & Continua 2022年第5期71卷 2363-2381页

作者： Mohd Anul haq Department of Computer science College of Computer and Information SciencesMajmaah UniversityAL Majmaah11952Saudi Arabia

Water received in rainfall is a crucial natural resource for agriculture,the hydrological cycle,and municipal *** changing rainfall pattern is an essential aspect of assessing the impact of climate change on water resources planning and *** change affected the entire world,specifically India’s fragile Himalayan mountain region,which has high significance due to being a climatic *** water coming from Himalayan rivers is essential for 1.4 billion people living *** studies either modeled temperature or rainfall for the Himalayan area;however,the combined influence of both in a long-term analysis was not performed utilizing Deep Learning(DL).The present investigation attempted to analyze the time series and correlation of temperature(1796–2013)and rainfall changes(1901–2015)over the Himalayan states in *** Climate Deep Long short-Term Memory(CDLsTM)model was developed and optimized to forecast all Himalayan states’temperature and rainfall ***’s Prophet(FB-Prophet)model was implemented to forecast and assess the performance of the developed CDLsTM *** performance of both models was assessed based on various performance metrics and shown significantly higher accuracies and low error rates.

关键词： Himalayas climate change cdlstm facebook temperature rainfall

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Blood exosomes as a tool for monitoring treatment efficacy and progression of neurodegenerative diseases

引用

Neural Regeneration Research 2019年第1期14卷 72-74页

作者： Hanin Abdel-haq National Center for Drug Research and Evaluation Istituto Superiore di Sanità

Alzheimer’s disease,Parkinson’s disease,Huntington’s disease,amyotrophic lateral sclerosis,and prion disease are representative neurodegenerative diseases that share common sub-cellular features,the most obvious of which is a strong association with the accumulation of misfolded,aggregated,and insoluble forms of proteins in the brain,as evidenced in post-mortem brain tissues of *** of neurodegenerative diseases is often

关键词：疾病治疗功效 cellular 工具 prion 蛋白质大脑

来源：

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

Analysis of lattices with non-linear interphases

引用

Acta Mechanica sinica 2006年第4期22卷 323-330页

作者： s. haq A. B. Movchan G. J. Rodin Faculty of Engineering sciences GIK Institute Topi 23640 NWFP Pakistan Department of Mathematical sciences University of Liverpool Liverpool L69 3BX UK Institute for Computational Engineering and sciences The University of Texas at Austin Austin TX 78712 USA

Anti-plane deformation of square lattices containing interphases is analyzed. It is assumed that lattices are linear elastic but not necessarily isotropic, whereas interphases exhibit non-linear elastic behavior. It is demonstrated that such problems can be treated effectively using Green＇s functions, which allow to eliminate the degrees of freedom outside of the interphase. Illustrative numerical examples focus on the determination of applied stresses leading to lattice instability.

关键词： Interphases in lattices stability Green's functions Evolution algroithm

来源：

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

Radiation efects on MHD stagnation point flow of nano fluid towards a stretching surface with convective boundary condition

引用

Chinese Journal of Aeronautics 2013年第6期26卷 1389-1397页

作者： Noreen sher Akbar s.Nadeem Rizwan Ul haq Z.H.Khan DBs&H CEMENational University of Sciences and TechnologyIslamabad 44000Pakistan Department of Mathematics Quaid-i-Azam UniversityIslamabad 44000Pakistan school of Mathematical sciences Peking University

The aim of the present paper is to study the numerical solutions of the steady MHD two dimensional stagnation point flow of an incompressible nano fluid towards a stretching *** effects of radiation and convective boundary condition are also taken into *** model used for the nanofluid incorporates the effects of Brownian motion and *** resulting nonlinear momentum,energy and nano particle equations are simplifed using similarity *** solutions have been obtained for the velocity,temperature and nanoparticle fraction *** influence of physical parameters on the velocity,temperature,nanoparticle fraction,rates of heat transfer and nanoparticle fraction are shown graphically.

关键词： Convective boundary condition Nanoparticles Numerical solutions Radiation effects stagnation point stretching surface

来源：

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

Petrogenesis of Late Cretaceous Volcanism in Kazhaba Area and Its Relationship with Mantle Plume Activity of Reunion Hotspot

引用

Journal of Earth science 2017年第2期28卷 229-240页

作者： Rehanul haq siddiqui Changqian Ma Balochistan University of lnformation Technology Engineering and Management Science Quetta 87650 Pakistan school of Earth sciences China University of GeosciencesWuhan 430074 China

Basaltic pillow lavas near the Kazhaba village in Balochistan are found in the tectonic slivers of the Bagh complex： the melange zone beneath the Muslim Bagh ophiolite complex. These volcanics are mainly represented by alkali basalts. The petrography and chemistry suggest that these volcanic rocks belong to mildly to strongly alkaline, intra-plate volcanic rock series. Their low Mg~# and low Cr, Ni and Co contents suggest that the parent magma of these volcanics was not directly derived from a partially melted mantle source, but resulted fractionation in an upper level magma chamber, en-route to eruption. Their LILE and HFsE, enriched primordial mantle-normalized patterns with marked positive Nb anomalies further confirm their within-plate geochemical signatures and are consistent with an enriched mantle source. Their highly enriched LREE patterns and high（La/Yb）_N and（Ce/Yb）_N ratios suggest a partially melted garnet-lherzolite parent magma source. The Zr versus Zr/Y studies suggest that these volcanics were derived from about 15% partially melted enriched mantle source. It is suggested that these Late Cretaceous intra-plate volcanics may represent the mantle plume activity of the Reunion hotspot, and were erupted during the passage of Ceno-Tethys Ocean floor prior to the passage of Indian Plate over it.

关键词： Late Cretaceous Kazhabavolcanics Balochistan Pakistan

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：