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| 1 | Satellite remote sensing of grasslands:from observation to management显示文摘Aims Grasslands are the world’s most extensive terrestrial ecosystem,and are a major feed source for livestock.Meeting increasing demand for meat and other dairy products in a sustainable manner is a big challenge.At a field scale,Global Positioning System and ground-based sensor technologies provide promising tools for grassland and herd management with high precision.With the growth in availability of spaceborne remote sensing data,it is therefore important to revisit the relevant methods and applications that can exploit this imagery.In this article,we have reviewed the(i)current status of grassland monitoring/observation methods and applications based on satellite remote sensing data,(ii)the technological and methodological developments to retrieve different grassland biophysical parameters and management characteristics(i.e.degradation,grazing intensity)and(iii)identified the key remaining challenges and some new upcoming trends for future development.Important Findings The retrieval of grassland biophysical parameters have evolved in recent years from classical regression analysis to more complex,efficient and robust modeling approaches,driven by satellite data,and are likely to continue to be the most robust method for deriving grassland information,however these require more high quality calibration and validation data.We found that the hypertemporal satellite data are widely used for time series generation,and particularly to overcome cloud contamination issues,but the current low spatial resolution of these instruments precludes their use for field-scale application in many countries.This trend may change with the current rise in launch of satellite constellations,such as RapidEye,Sentinel-2 and even the microsatellites such as those operated by Skybox Imaging.Microwave imagery has not been widely used for grassland applications,and a better understanding of the backscatter behaviour from different phenological stages is needed for more reliable products in cloudy regions.The development of hyperspectral satellite instrumentation and analytical methods will help for more detailed discrimination of habitat types,and the development of tools for greater end-user operation. | Iftikhar Ali Fiona Cawkwell Edward Dwyer Brian Barrett Stuart Green | 2016 | Journal of Plant Ecology2016，9，6： | 15 |
| 2 | 全球植被年际尺度动态过程的数值模拟及其评估显示文摘动态植被模型(Interactive Canopy Model,ICM)中考虑了生态系统碳氮循环过程,能够描述较短时间尺度上的植被与大气之间相互作用过程。利用21 a的GIMMS卫星观测LAI资料,与ICM模拟结果进行年际变率对比分析,评估模型对植被年际变化的模拟性能。结果表明,ICM能在一定程度上反映植被年际变率的空间分布特征,但模拟的热带部分地区植被的年际变率偏小,除此之外大部分地区模拟的年际变率偏大;模拟能够反映出全球植被年际变化的主要空间分布型,同时低纬度地区植被的时间演变特征要好于高纬度地区;ICM对寒带灌丛、北非稀树大草原、落叶针叶林的年际变化模拟较好,但对中国东部农作物的模拟表现出了明显的周期振荡现象,与实际情况差距较大。 | 俞淼 陈海山 孙照渤 Iftikhar Ahmad | 2010 | 大气科学学报2010，33，3： | 7 |
| 3 | Visual object tracking- classical and contemporary approaches显示文摘 | Ahmad ALI Abdul JALIL Jianwei NIU Xiaoke ZHAO Saima RATHORE Javed AHMED Muhammad AKSAM IFTIKHAR | 2016 | Frontiers of Computer Science2016，10，1： | 7 |
| 4 | Decentralized Dynamic Event-Triggered Communication and Active Suspension Control of In-Wheel Motor Driven Electric Vehicles with Dynamic Damping显示文摘This paper addresses the co-design problem of decentralized dynamic event-triggered communication and active suspension control for an in-wheel motor driven electric vehicle equipped with a dynamic damper. The main objective is to simultaneously improve the desired suspension performance caused by various road disturbances and alleviate the network resource utilization for the concerned in-vehicle networked suspension system. First, a T-S fuzzy active suspension model of an electric vehicle under dynamic damping is established. Second,a novel decentralized dynamic event-triggered communication mechanism is developed to regulate each sensor's data transmissions such that sampled data packets on each sensor are scheduled in an independent manner. In contrast to the traditional static triggering mechanisms, a key feature of the proposed mechanism is that the threshold parameter in the event trigger is adjusted adaptively over time to reduce the network resources occupancy. Third, co-design criteria for the desired event-triggered fuzzy controller and dynamic triggering mechanisms are derived. Finally, comprehensive comparative simulation studies of a 3-degrees-of-freedom quarter suspension model are provided under both bump road disturbance and ISO-2631 classified random road disturbance to validate the effectiveness of the proposed co-design approach. It is shown that ride comfort can be greatly improved in either road disturbance case and the suspension deflection, dynamic tyre load and actuator control input are all kept below the prescribed maximum allowable limits, while simultaneously maintaining desirable communication efficiency. | Iftikhar Ahmad Xiaohua Ge Qing-Long Han | 2021 | IEEE/CAA Journal of Automatica Sinica2021，8，5： | 7 |
| 5 | An Ontology-Based Framework for Semi-Automatic Schema Integration显示文摘Currently, schema integration frameworks use approaches like rule-based, machine learning, etc. This paper presents an ontology-based wrapper-mediator framework that uses both the rule-based and machine learning strategies at the same time. The proposed framework uses global and local ontologies for resolving syntactic and semantic heterogeneity,and XML for interoperability. The concepts in the candidate schemas are merged on the basis of the similarity coefficient,which is calculated using the defined rules and the prior mappings stored in the case-base. | Zille Huma Muhammad Jaffar-Ur Rehman Nadeem Iftikhar | 2005 | Journal of Computer Science & Technology2005，20，6： | 6 |
| 6 | Fecal Microbiome and Volatile Organic Compound Metabolome in Obese Humans With Nonalcoholic Fatty Liver Disease显示文摘 | Maitreyi Raman Iftikhar Ahmed Patrick M. Gillevet Chris S. Probert Norman M. Ratcliffe Steve Smith Rosemary Greenwood Masoumeh Sikaroodi Victor Lam Pam Crotty Jennifer Bailey Robert P. Myers Kevin P. Rioux | 2013 | Clinical Gastroenterology and Hepatology2013，，7： | 5 |
| 7 | Use of health-related quality of life tools in hepatobiliary surgery显示文摘BACKGROUND:The objective of this article is to review the literature and discuss the various tools used in hepatobiliary surgery for the measurement of health related quality of life (HR-QOL) and highlight various outcome variables that affect the HR-QOL among patients with common hepatobiliary disorders. DATA SOURCES: We reviewed HR-QOL articles published in the last 20 years on different hepatobiliary curative or palliative procedures in all languages. RESULTS: HR-QOL is a questionnaire tool which is utilized to assess the changes in the health status of patients after a hepatobiliary intervention. These surveys are of increasingly importance, as health care providers are challenged to justify treatment approaches and rationale for any surgical intervention. These HR-QOL tools are very helpful for the evaluation of subjective outcome of common hepatobiliary procedures like gastrointestinal quality of life index (GIQLI) for cholecystectomy, functional assessment in cancer therapy (FACT) for liver resection, short form 36 (SF-36) for liver transplantation, and quality of life questionnaire for patients with pancreatic cancer (QLQ-PAN). CONCLUSIONS: Use of validated and reliable health instruments in hepatobiliary surgery is directed at measuring the impact in a reproducible and valid fashion. Curative or palliative procedures should be offered to the patients of hepatobiliary disorders after the assessment by HR-QOL tools. Because the impairments of function that may occur after different operations vary considerably, an operation-specific assessment of HR-QOL for each type of surgical procedure is becoming an essential principle to follow in a successful healthcare system. | Muhammad Shafique Sajid Mawara Iftikhar Jasmin Rimple Mirza Khurrum Baig | 2008 | Hepatobiliary & Pancreatic Diseases International2008，7，2： | 5 |
| 8 | Effect of rare earth and transition metal La-Mn substitution on electrical properties of co-precipitated M-type Ba-ferrites nanoparticles显示文摘In the current research work Ba_(1-x)La)xMn)yFe_(12-y)O_(19) hexa-ferrite nanoparticles of different compositions were synthesized using chemical co-precipitation technique. The structural properties were explored using X-ray diffractions(XRD), scanning electron microscopy(SEM) and Fourier transmission infrared spectroscopy(FTIR). XRD indexed pattern confirms the formation of M-type hexagonal phase. The crystallite size of synthesized samples ranges from 13 to 34 ± 2 nm. FTIR peaks observe also confirmed the presence of metaloxygen bond of the desired product. The position of peak at 467 cm^(-1) corresponds to A_2 u vibration for octahedral Fe(4+)-O and peak position E1 u corresponds to vibration of Fe(3+)O4 octahedral bonds. The band v_1 in range(677-559 cm^(-1)) and v_2 in frequency range(356-419 cm^(-1)) are associated to A and B sites.Dielectric properties of all compositions were measured with frequency. The dielectric constant, loss and tangent loss decrease from 26 to 9, 25 to 2 and 0.94 to 0.14, respectively with frequency. DC electrical resistivity is increased with dopant concentration increasing from 2.15 × 10~4 to 1.92 ×10~5 Ω·cm. | Muhammad Ayub Iftikhar Hussain Gul Khalid Nawaz Khurram Yaqoob | 2019 | Journal of Rare Earths2019，37，2： | 4 |
| 9 | Elemental composition of rice using calibration free laser induced breakdown spectroscopy显示文摘In this paper, we apply laser induce breakdown spectroscopy (LIBS) to determine the elemental composition of different parts(root, stem and seed) of the rice plant and determine their weighted concentration using calibration free laser induced breakdown spectroscopy (CF-LIBS) technique. Ca, Fe and K are identified as major elements, while C, Ti, Mg, Si, Li, Ba, Sr, Cr, Na and Al as minor elements. We also detect the H-alpha line of hydrogen in the spectrum and determine the electron number density. The electron number density and its behavior as a function of laser energy, laser wavelength and the detector position are investigated. The plasma temperatures of samples are determined, and the validity of the assumption of the local thermodynamic equilibrium (LTE) is discussed. | Abdul Jabbar Mahmood Akhtar Arslan Ali Shaukat Mehmood Sidra Iftikhar Muhmmad Aslam Baig | 2019 | Optoelectronics Letters2019，15，1： | 4 |
| 10 | Progress,problems and prospects for standardization of greenhouse-related technologies显示文摘In recent years,the scale of greenhouse grows rapidly and steadily in China,which promotes the development of greenhouse technology and the demand for standardized technology.However,the standardization process of greenhouse industry in China has been facing with the problem of unbalanced development with the practical standard system for many years.To solve these problems,the most characteristic greenhouse designs used in China contributing to this work are presented in detail.And the development of standard system and the standardization efforts of them are summarized and analyzed in relationship to the data presented in this paper.In this way the origin of greenhouse standard system in China and context of the system development and standardization of greenhouse structure are clarified.It was also found that the development and iterative update of greenhouse standard system are under the influences of enterprises which as the participation of standard constitutors were proved to play an important role in promoting the standardization development of greenhouse.The outcome of this work may be utilized to perfect the greenhouse standardization system and improve the greenhouse standardization efficiency that dominate the facility agriculture in China. | Yanzhao Ren Minjuan Wang Iftikhar Ahmed Saeeda Xuerui Chen Wanlin Gao | 2018 | International Journal of Agricultural and Biological Engineering2018，11，1： | 4 |
| 11 | Quest for carbon and vanadium oxide based rechargeable magnesium-ion batteries显示文摘Rechargeable magnesium ion batteries are potential candidates to replace the lithium ion batteries due to their high volumetric energy density,dendrite free cycling,and low costs.In present work,we have critically reviewed the recent advances made in the field of cathode materials development to achieve the high reversible capacities and working potentials.In first part,carbon-based cathodes such as fluorinedoped graphene nanosheets and graphite fluoride(CF0.8)are discussed in terms of compatibilities of pos让ive electrode materials and electrolyte solutions for rechargeable magnesium-ion batteries.Whereas,the second part of this review focuses on crystal structure of vanadium oxide and its capability to accommodate the Mg^2+ions.Likewise,electrochemical performance of selected vanadium oxide based cathodes including VO2(B),FeVO4.0.9H2(X Mc)2.5+yVO9+δ,RFC/V2O5 and V2O5/Graphene composite,are discussed at different temperatures.To support the future research on magnesium ion batteries,particularly positive electrode material developments,several innovative research directions are proposed. | Muhammad Rashad Muhammad Asif Iftikhar Ahmed Zhen He Li Yin Zhou Xiao Wei Yuxin Wang | 2020 | Journal of Magnesium and Alloys2020，8，2： | 3 |
| 12 | Post splenectomy related pulmonary hypertension显示文摘Splenectomy predisposes patients to a slew of infectious and non-infectious complications including pulmonary vascular disease. Patients are at increased risk for venous thromboembolic events due to various mechanisms that may lead to chronic thromboembolic pulmonary hypertension(CTEPH). The development of CTEPH and pulmonary vasculopathy after splenectomy involves complex pathophysiologic mechanisms, some of which remain unclear. This review attempts to congregate the current evidence behind our understanding about the etio-pathogenesis of pulmonary vascular disease related to splenectomy and highlight the controversies that surround its management. | Atul V Palkar Abhinav Agrawal Sameer Verma Asma Iftikhar Edmund J Miller Arunabh Talwar | 2015 | World Journal of Respirology2015，5，2： | 3 |
| 13 | Observation of unconventional anomalous Hall effect in epitaxial CrTe thin films显示文摘 | Dapeng Zhao Liguo Zhang Iftikhar Ahmed Malik Menghan Liao Wenqiang Cui Xinqiang Cai Cheng Zheng Luxin Li Xiaopeng Hu Ding Zhang Jinxing Zhang Xi Chen Wanjun Jiang Qikun Xue | 2018 | Nano Research2018，11，6： | 3 |
| 14 | Polyhydroxyalkanoates: Current applications in the medical field显示文摘Polyhydroxyalkanoates (公众房产管理局) 是被微生物细胞内部地综合的 biopolyesters 的一个班,主要由 eubacteria 的不同的类。这些 biopolymers 有也在自然作为可被细菌破坏分类他们并且使他们兼容到生活系统的多样的物理、化学的性质。在最后二十年左右,公众房产管理局由于他们的唯一的性质为不同应用在医药地里作为潜在的有用材料出现了。公众房产管理局的更低的酸味和 bioactivity 与象 poly 乳的酸(PLA ) 和 poly-glycolic 酸(针网阵列) 那样的另外的 biopolymers 相比与最小的风险授与他们。因此,公众房产管理局的通用性作为在 vivo 以他们的无毒的降级产品, biocompatibility ,需要的表面修正,物理、化学的性质的宽范围,细胞的生长支持,和没有 carcinogenic 效果的附件启用了他们的使用植入例如缝术,粘附障碍,并且阀门到指南织物修理并且在象心血管的补丁,关节的软骨修理脚手架,骨头接枝代用品,和神经指南那样的新生设备。这里,我们简短描述一些在医药应用包含公众房产管理局的使用的最近的创新研究。公众房产管理局的微生物引起的生产也提供机会通过新陈代谢的工程途径经济地与更独特的单体作文开发公众房产管理局。目前,由细菌的公众房产管理局单体作文和表面修正影响房间 responses.PHA 合成不要求催化剂的使用,这通常被建立(在另外的聚合物的合成使用) ,它进一步支持导出公众房产管理局的聚合物的 biocompatibility。 | Iftikhar Ali Nazia Jamil | 2016 | Frontiers in Biology2016，11，1： | 3 |
| 15 | Distributed Modeling of Extraterrestrial Solar Radiation Over the Rugged Terrains of Pakistan显示文摘In Pakistan,the solar analogue has been addressed but its surface geographical parameterization has given least attention.Inappropriate density of stations and their spatial coverage particularly in difficult peripheral national territories,little or no solar radiation data,non-satisfactory sunshine hours data,and low quality of ground observed cloud cover data create a situation in which the spatial modeling of Extraterrestrial Solar Radiation(ESR) and its ground parameterization got sufficient scope.The Digital Elevation Model (DEM) input into Geographic Information System (GIS) is a compatible tool to demonstrate the spatial distribution of ESR over the rugged terrains of the study domain.For the first time,distributed modeling of ESR is done over the rugged terrains of Pakistan,based on DEM and ArcGIS..Results clearly depict that the complex landforms profoundly disrupt the zonal distribution of ESR in Pakistan.The screening impact of topography is higher on spatial distribution of ESR in winter and considerably low in summer.The combined effect of topography and latitude is obvious.Hence,the model was further testified by plotting Rb (ratio of ESR quantity over rugged terrain against plane surface) against azimuth at different latitudes with different angled slopes.The results clearly support the strong screening effect of rugged terrain through out the country especially in Himalayas,Karakoram and Hindukush (HKH),western border mountains and Balochistan Plateau.This model can be instrumental as baseline geospatial information for scientific investigations in Pakistan,where substantial fraction of national population is living in mountainous regions. | Romana AMBREEN QIU Xinfa Iftikhar AHMAD | 2011 | Journal of Mountain Science2011，8，3： | 3 |
| 16 | Enhancing Dielectric and Mechanical Behaviors of Hybrid Polymer Nanocomposites Based on Polystyrene,Polyaniline and Carbon Nanotubes Coated with Polyaniline显示文摘The dielectric and mechanical properties of hybrid polymer nanocomposites of polystyrene/polyaniline/carbon nanotubes coated with polyaniline(PCNTs) have been investigated using impedance analyzer and extensometer. The blends of PS/PANI formed the heterogeneous phase separated morphology in which PCNTs are dispersed uniformly. The incorporation of a small amount of PCNTs into the blend of PS/PANI has remarkably increased the dielectric properties. Similarly, the AC conductivity of PS/PANI is also increased five orders of magnitude from 1.6 × 10^(-10) to 2.0 × 10^(-5) S·cm^(-1) in the hybrid nanocomposites. Such behavior of hybrid nanocomposites is owing to the interfacial polarization occurring due to the presence of multicomponent domains with varying conductivity character of the phases from insulative PS to poor conductor PANI to highly conductive CNTs. Meanwhile, the tensile modulus and tensile strength are also enhanced significantly up to 55% and 160%, respectively, without much loss of ductility for three phase hybrid nanocomposites as compared to the neat PS. Thereby, the hybrid nanocomposites of PS/PANI/_P CNTs become stiffer, stronger and tougher as compared to the neat systems. | Tanveer ul Haq Zia Ahmad Nawaz Khan Majid Hussain Ibrar Hassan Iftikhar Hussain Gul | 2016 | Chinese Journal of Polymer Science2016，34，12： | 2 |
| 17 | Exploring the potential of Sentinel-2A satellite data for aboveground biomass estimation in fragmented Himalayan subtropical pine forest显示文摘The Sentinel-2 A satellite having embedded advantage of red edge spectral bands offers multispectral imageries with improved spatial,spectral and temporal resolutions as compared to the other contemporary satellites providing medium resolution data.Our study was aimed at exploring the potential of Sentinel-2 A imagery to estimate Above Ground Biomass(AGB) of Subtropical Pine Forest in Pakistan administered Kashmir.We developed an AGB predictive model using field inventory and Sentinel 2 A based spectral and textural parameters along with topographic features derived from ALOS Digital Elevation Model(DEM).Field inventory data was collected from 108 randomly distributed plots(0.1 ha each) across the study area.The stepwise linear regression method was employed to investigate the potential relationship between field data and corresponding satellite data.Biomass and carbon mapping of the study area was carried out through established AGB estimation model with R(o.86),R2(0.74),adjusted R2(0.72) and RMSE value of 33 t/ha.Our results showed that first order textures(mean,standard deviation and variance) significantly contributed in AGB predictive modeling while only one spectral band ratio made contribution from spectral domain.Our study leads to the conclusion that Sentinel-2 A optical data is a potential source for AGB estimation in subtropical pine forest of the area of interest with added benefit of its free of cost availability,higher quality data and long-term continuity that can be utilized for biomass carbon distribution mapping in the resource constraint study area for sustainable forest management. | Mobushir Riaz KHANI Iftikhar Ahmad KHAN Muhammad Hasan Ali BAIG LIU Zheng-jia Muhammad Irfan ASHRAF | 2020 | Journal of Mountain Science2020，17，12： | 2 |
| 18 | Strongly correlated intermetallic rare-earth monoaurides(Ln-Au):Ab-initio study显示文摘In this paper, we explored the structural, elastic and mechanical properties of the strongly correlated electron systems, intermetallic Ln-Au(Ln = Ce, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) in cubic structure,using PF-LAPW method within the density functional theory. Structural properties of these intermetallics were investigated by treating the exchange-correlation potential with the GGA-PBE, GGA-PBEsol and GGA + U. The effectiveness of the U for the structural properties as compared to other methods confirms the strong correlated nature of these compounds and the calculated lattice constants endorse the divalency of Yb. The results demonstrate the stable cubic CsCl structure of these compounds. Bulk modulus, Young's modulus, shear modulus, B/G ratio, Cauchy pressure, Poisson's ratio, anisotropic ratio,Kleinman parameters and Lame's coefficients were studied using the PBEsol to evaluate their importance in various types of engineering applications. The most prominent features of these compounds are their ductility, very high melting points, resistance to corrosion, and anisotropic nature. | Sardar Ahmad M.Shafiq Rashid Ahmad S.Jalali-Asadabadi Iftikhar Ahmad | 2018 | Journal of Rare Earths2018，36，10： | 2 |
| 19 | Loan growth and bank solvency:evidence from the Pakistani banking sector显示文摘Background:The dramatic loan growth and changes in the Pakistani banking system in mid-2000s have led to significant research attention on borrowers and lenders.This expansion and diversification in financial sector was driven by structural reforms,political stability and significant economic growth.Against this background,this study investigates the loan growth and risk-taking behavior of the banks during the expansionary periods of lending.Method:This study used dynamic two-step system generalized method of moment’s estimation technique,based on data taken from 32 banks in Pakistan over 2006-2014.Result:Loan growth has a significant effect on bank-specific and macroeconomicspecific variables.Loan growth in the previous year raises non-performing loans and decreases the solvency of banks with a time lag of many years.The driving force behind this phenomenon is weak prudential regulation among competitors,the asymmetric information of the borrowers,and,most importantly,that banks underestimate the risk of lending during credit booms.Conclusion:More regulatory measures are required to ensure a strong financial system when the volume of non-performing loan grows significantly.An increase in the capital requirement policy for rapidly growing banks is also needed because the problem of abnormal loan growth cannot be detected at the current time.At the same time,strong supervision is necessary to avoid the adverse consequences of borrower selection. | Muhammad Kashif Syed Faizan Iftikhar Khurram Iftikhar | 2016 | Financial Innovation2016，2，1： | 2 |
| 20 | MHD Maxwell Fluid with Heat Transfer Analysis under Ramp Velocity and Ramp Temperature Subject to Non-Integer Differentiable Operators显示文摘The main focus of this study is to investigate the impact of heat generation/absorption with ramp velocity and ramp temperature on magnetohydrodynamic(MHD)time-dependent Maxwell fluid over an unbounded plate embedded in a permeable medium.Non-dimensional parameters along with Laplace transformation and inversion algorithms are used to find the solution of shear stress,energy,and velocity profile.Recently,new fractional differential operators are used to define ramped temperature and ramped velocity.The obtained analytical solutions are plotted for different values of emerging parameters.Fractional time derivatives are used to analyze the impact of fractional parameters(memory effect)on the dynamics of the fluid.While making a comparison,it is observed that the fractional-order model is best to explain the memory effect as compared to classical models.Our results suggest that the velocity profile decrease by increasing the effective Prandtl number.The existence of an effective Prandtl number may reflect the control of the thickness of momentum and enlargement of thermal conductivity.The incremental value of the M is observed for a decrease in the velocity field,which reflects to control resistive force.Further,it is noted that the Atangana-Baleanu derivative in Caputo sense(ABC)is the best to highlight the dynamics of the fluid.The influence of pertinent parameters is analyzed graphically for velocity and energy profile.Expressions for skin friction and Nusselt number are also derived for fractional differential operators. | Thabet Abdeljawad Muhammad Bilal Riaz Syed Tauseef Saeed Nazish Iftikhar | 2021 | Computer Modeling in Engineering & Sciences2021，，2： | 2 |
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