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178篇 您的检索式:作者名="Numans"
    题名 作者 年代 出处 被引量
1陕北黄土丘陵区不同土地利用方式下土壤碳剖面分布特征显示文摘黄土高原土层深厚,土壤剖面碳存储受土地利用方式影响明显.为探讨不同土地利用方式对深层土壤碳分布的影响,研究了人工经济林地(陕北米脂)、退耕还林地(神木)和防风固沙林地(榆林榆阳区)0~20.0 m土壤有机碳(SOC)和无机碳(SIC)的分布特征和差异.结果表明,在不同土地利用方式下SOC含量:矮化枣树(2.00 g·kg^(-1))>未矮化枣树(1.54 g·kg^(-1))>柠条林(0.97 g·kg^(-1))>退化人工草地(0.81 g·kg^(-1))>樟子松林(0.70 g·kg^(-1))>荒草地(0.45 g·kg^(-1)),且各剖面之间SOC含量存在显著性差异(P<0.05).在不同土地利用方式下SIC含量:矮化枣树(11.66 g·kg^(-1))≥未矮化枣树(11.59g·kg^(-1))>柠条林(9.62 g·kg^(-1))>退化人工草地(8.07 g·kg^(-1))>樟子松林(4.32 g·kg^(-1))>荒草地(0.47 g·kg^(-1));人工经济林和退耕还林(草)样地内所有土壤剖面之间SIC含量无显著性差异;人工经济林、退耕还林(草)剖面和防风固沙林地剖面SIC含量存在显著性差异(P<0.05).矮化枣树、未矮化枣树、柠条林、退化人工草地、樟子松林和荒草地土壤剖面无机碳密度分别是有机碳密度的6.19、7.71、10.80、10.78、5.91和1.03倍.综上可见,不同土地利用方式之间土壤碳储量存在明显差异,无机碳的含量远高于有机碳.兰志龙 赵英 张建国 李会杰 司炳成 焦瑞 Muhammad Numan Khan Tanveer Ali Sial 2018环境科学2018,39,1:25
225年长期定位不同施肥措施对关中塿土水力学性质的影响显示文摘土壤水力学性质和功能的变化是评价长期施肥是否维持土壤可持续健康发展的重要方面。该研究通过采取'国家黄土肥力与肥料效益监测基地'的表层原状土壤,分析测定了撂荒(LH)、休闲(XX)、不施肥(CK)、单施氮肥(N)、氮磷钾肥(NPK)和有机肥与氮磷钾肥配施(MNPK)6个处理的土壤水分特征曲线、饱和导水率和紧实度等指标,评价了长期定位施肥对土壤基本物理性质和水力学性质的影响。结果表明:1)与CK、N和NPK处理相比,MNPK处理显著提高了土壤有机碳、饱和导水率和孔隙度,而降低了土壤容重和紧实度(P<0.05)。2)不同施肥处理之间的土壤水分特征曲线表现出一定的差异,其土壤持水能力强弱为:XX9μm大孔隙范围内,其次是<0.2μm小孔隙范围,0.2~9μm之间的中孔隙分布较少。综上,MNPK有助于改善土壤结构,提高土壤持水性,降低土壤容重和紧实度,有助于作物生长和高产,是关中地区较为适宜的施肥措施。兰志龙 Muhammad Numan Khan Tanveer Ali Sial 杨学云 赵英 张建国 2018农业工程学报2018,34,24:10
3A systematic review of running-related musculoskeletal injuries in runners显示文摘Objective:Running-related musculoskeletal injuries(RRMIs),especially stemming from overuse,frequently occur in runners.This study aimed to systematically review the literature and determine the incidence and prevalence proportion of RRMIs by anatomic location and specific pathology.Methods:An electronic database search with no date beginning restrictions was performed in SPORTDiscus,PubMed,and MEDLINE up to June 2020.Prospective studies were used to find the anatomic location and the incidence proportion of each RRMI,whereas retrospective or cross-sectional studies were used to find the prevalence proportion of each RRMI.A separate analysis for ultramarathon runners was performed.Results:The overall injury incidence and prevalence were 40.2%±18.8%and 44.6%±18.4%(mean±SD),respectively.The knee,ankle,and lower leg accounted for the highest proportion of injury incidence,whereas the knee,lower leg,and foot/toes had the highest proportion of injury prevalence.Achilles tendinopathy(10.3%),medial tibial stress syndrome(9.4%),patellofemoral pain syndrome(6.3%),plantar fasciitis(6.1%),and ankle sprains(5.8%)accounted for the highest proportion of injury incidence,whereas patellofemoral pain syndrome(16.7%),medial tibial stress syndrome(9.1%),plantar fasciitis(7.9%),iliotibial band syndrome(7.9%),and Achilles tendinopathy(6.6%)had the highest proportion of injury prevalence.The ankle(34.5%),knee(28.1%),and lower leg(12.9%)were the 3 most frequently injured sites among ultramarathoners.Conclusion:The injury incidence proportions by anatomic location between ultramarathoners and non-ultramarathoners were not significantly different(p=0.798).The pathologies with the highest incidence proportion of injuries were anterior compartment tendinopathy(19.4%),patellofemoral pain syndrome(15.8%),and Achilles tendinopathy(13.7%).The interpretation of epidemiological data in RRMIs is limited due to several methodological issues encountered.Nicolas Kakouris Numan Yener Daniel T.P.Fong 2021Journal of Sport and Health Science2021,10,5:5
4A framework for stochastic estimation of electric vehicle charging behavior for risk assessment of distribution networks显示文摘Power systems are being transformed to enhance the sustainability.This paper contributes to the knowledge regarding the operational process of future power networks by developing a realistic and stochastic charging model of electric vehicles(EVs).Large-scale integration of EVs into residential distribution networks(RDNs)is an evolving issue of paramount significance for utility operators.Unbalanced voltages prevent effective and reliable operation of RDNs.Diversified EV loads require a stochastic approach to predict EVs charging demand,consequently,a probabilistic model is developed to account several realistic aspects comprising charging time,battery capacity,driving mileage,state-of-charge,traveling frequency,charging power,and time-of-use mechanism under peak and off-peak charging strategies.An attempt is made to examine risks associated with RDNs by applying a stochastic model of EVs charging pattern.The output of EV stochastic model obtained from Monte-Carlo simulations is utilized to evaluate the power quality parameters of RDNs.The equipment capability of RDNs must be evaluated to determine the potential overloads.Performance specifications of RDNs including voltage unbalance factor,voltage behavior,domestic transformer limits and feeder losses are assessed in context to EV charging scenarios with various charging power levels at different penetration levels.Moreover,the impact assessment of EVs on RDNs is found to majorly rely on the type and location of a power network.Salman HABIB Muhammad Mansoor KHAN Farukh ABBAS Muhammad NUMAN Yaqoob ALI Houjun TANG Xuhui YAN 2020Frontiers in Energy2020,14,2:3
5Stress analysis of functionally graded rotating discs: analytical and numerical solutions显示文摘This study deals with stress analysis of annular rotating discs made of functionally graded materials(FGMs).Elasticity modulus and density of the discs are assumed to vary radially according to a power law function,but the material is of constant Poisson's ratio.A gradient parameter n is chosen between 0 and 1.0.When n = 0,the disc becomes a homogeneous isotropic material.Tangential and radial stress distributions and displacements on the disc are investigated for various gradient parameters n by means of the diverse elasticity modulus and density by using analytical and numerical solutions.Finally,a homogenous tangential stress distribution and the lowest radial stresses along the radius of a rotating disc are approximately obtained for the gradient parameter n = 1.0 compared with the homogeneous,isotropic case n = 0.This means that a disc made of FGMs has the capability of higher angular rotations compared with the homogeneous isotropic disc.Hasan Callioglu Numan Behll Bektas Metin Sayer 2011Acta Mechanica Sinica2011,27,6:3
6Comparison of total/active ghrelin levels in primary open angle glaucoma,pseudoexfoliation glaucoma and pseudoexfoliation syndrome显示文摘AIM:To investigate the levels of ghrelin(Gh),acylated ghrelin(AGh) and AGh/Gh ratio in the humor aqueous(HA) of cases with pseudoexfoliation syndrome(PXS),pseudoexfoliation glaucoma(PXG),primary open angle glaucoma(POAG) and to compare these with control subjects.METHODS:A prospective examination was made of the total Gh,and AGh levels in HA of 67 patients undergoing cataract surgery.Patients were divided into 4 groups.HA samples were aspirated at the beginning of the surgery,stored at -70℃.Gh and AGh quantification was performed with ELISA kits and the AGh/total-Gh ratios were calculated.ANOVA,Kruskal-Wallis,Chi-square and post-hoc tests were used for statistical analysis.RESULTS:Total Gh levels in HA were 189.2±45.6 pg/mL in the control group,199.2±32.9 pg/mL in PXS,180.6±20.9 pg/mL in PXG and 176.8±21.4 pg/mL in POAG groups(P>0.05).AGh levels in HA were 23.09±5.01 pg/mL in the control group,24.13±5.22 pg/mL in PXS,22.29±1.55 pg/m L in PXG and 19.69±2.93 pg/mL in POAG groups(P>0.05).The ratio of AGh/Gh was 10.3%±2.34% in the control group,13.03%±2.58% in PXS,12.3%±1.54% in PXG and 11.79%±1.41% in POAG groups(P=0.044).The difference between the PXS and control groups was significant(P=0.03).CONCLUSION:In spite of statistically insignificant results,the HA total Gh levels were lower than those of the control subjects but not parallel with the AGh levels in glaucoma patients.The relative increase in the AGh/Gh ratio in glaucoma cases supports the view that proportional increases of AGh might play a role in the pathogenesis of glaucoma.Numan Eraslan Ufuk Elgin Emine Sen Aytul Kilic Pelin Yilmazbas 2018International Journal of Ophthalmology(English edition)2018,11,5:3
7Sonochemical synthesis of nanostructured nickel hydroxide as an electrode material for improved electrochemical energy storage application显示文摘A facile and fast approach for the synthesis of a nanostructured nickel hydroxide(Ni(OH)_2) via sonochemical technique is reported in the present study. The X-ray diffraction results confirmed that the synthesized Ni(OH)_2 was oriented in β-phase of hexagonal brucite structure. The nanostructured Ni(OH)_2 electrode exhibited the maximum specific capacitance of 1256 F/g at a current density of 200 mA/g in 1 M KOH_((aq)). Ni(OH)_2 electrodes exhibited the pseudocapacitive behavior due to the presence of redox reaction. It also exhibited long-term cyclic stability of 85% after 2000 cycles, suggesting that the nanostructured Ni(OH)_2 electrode will play a promising role for high performance supercapacitor application.Arshid Numan Navaneethan Duraisamy Fatin Saiha Omar Dhanaraj Gopi K.Ramesh S.Ramesh 2017Progress in Natural Science:Materials International2017,27,4:2
8Determination of Some Trace Metals in Environmental Samples by Flame AAS Following Solid Phase Extraction with Amberlite XAD-2000 Resin after Complexing with 8-Hydroxyquinoline显示文摘为 Mn ( II )的 preconcentration 的一个过程, Fe ( II ),公司( II ), Cu ( II ), Cd ( II ), Zn ( II ), Pb ( II )和 Ni ( II )被火焰 AAS 为环境样品的分析基于他们有在列的 Amberlite XAD-2000 树脂上的 8-hydroxyquinoline ( HQ )的建筑群的保留建议。象 pH, eluent 类型,卷,集中,流动率和样品答案的体积那样的各种各样的参数,和金属离子的保留上的矩阵干扰效果被调查。为在问题的金属建筑群的保留的最佳 pHs 除了为其价值是 8 的 Mn2+ 是大约 6。为从在最佳条件下面的树脂的这些金属和他们的恢复的吸附物的装载能力在范围是 6.829.26DURAN, Celal SENTURK, H. Basri GUNDOGDU, Ali BULUT, V. Numan EICi, Latif SOYLAK, Mustafa TUFEKCI, Mehmet UYGUR, Yaprak 2007Chinese Journal of Chemistry2007,25,2:2
9Dynamics of organic carbon and nitrogen in deep soil profile and crop yields under long-term fertilization in wheat-maize cropping system显示文摘Soil organic carbon(SOC)and nitrogen(N)are two of the most important indicators for agricultural productivity.The primary objective of this study was to investigate the changes in SOC and N in the deep soil profile(up to 100 cm)and their relationships with crop productivity under the influence of long-term(since 1990)fertilization in the wheat-maize cropping system.Treatments included CK(control),NP(inorganic N and phosphorus(P)fertilizers),NPK(inorganic N,P and potassium fertilizers),NPKM(NPK plus manure),and M(manure).Crop yield and the properties of topsoil were measured yearly from 2001 to 2009.C and N contents were measured at five different depths in 2001 and 2009.The results showed that wheat and maize yields decreased between 2001 and 2009 under the inorganic fertilizer(NP and NPK)treatments.The average yield between 2001 and 2009 under the NP,NPK,NPKM,and M treatments(compared with the CK treatment)increased by 38,115,383,and 381%,respectively,for wheat and 348,891,2738,and 1845%,respectively,for maize.Different long-term fertilization treatments significantly changed coarse free particulate(cf POC),fine free particulate(ff POC),intramicroaggregate particulate(i POC),and mineral-associated(m SOC)organic carbon fractions.In the experimental years of 2001 and 2009,soil fractions occurred in the following order for all treatments:m SOC>cf POC>i POC>ff POC.All fractions were higher under the manure application treatments than under the inorganic fertilization treatments.Compared to the inorganic fertilization treatments,manure input enhanced the stocks of SOC and total N in the surface layer(0–20 cm)but decreased SOC and N in the deep soil layer(80–100 cm).This reveals the efficiency of manure in increasing yield productivity and decreasing risk of vertical loss of nutrients,especially N,compared to inorganic fertilization treatments.The findings provide opportunities for understanding deep soil C and N dynamics,which could help mitigate climate change impact on agricultural production and maintain soil health.Muhammad QASWAR LI Dong-chu HUANG Jing HAN Tian-fu Waqas AHMED Sehrish ALI Muhammad Numan KHAN Zulqarnain Haider KHAN XU Yong-mei LI Qian ZHANG Hui-min WANG Bo-ren Ahmad TAUQEER 2022Journal of Integrative Agriculture2022,21,3:2
10玻璃体腔抗VEGF治疗糖尿病性黄斑水肿的疗效分析(英文)显示文摘目的:评估玻璃体腔内抗VEGF治疗糖尿病黄斑水肿(DME)24mo后的现实生活剖析和视觉效果。方法:本研究包括了2012-06/2016-12接受玻璃体腔内注射的视网膜内和/或视网膜下液体和基线中心黄斑厚度(CMT)超过300μm的DME患者。在基线处3,6,12,18和24mo评估视力(VA)和CMT的变化,以及患者就诊和玻璃体腔内注射总数。结果:研究包含40例患者(54眼)。基线处3mo LogMAR视力从0.67±0.47提高到0.59±0.43并在12mo内保持3.5±2.19次注射。12mo和24mo时平均就诊次数分别为9±2.39和15.48±4.84。基线处平均CMT为450±153μm,12mo和24mo时分别降至385±141μm和305±111μm(P<0.001)。结论:PRN方法在治疗DME中可以保持视力稳定并改善黄斑水肿,但在主动疗法中,较低的就诊负担可能会获得类似的或更好的治疗效果。Cemal ?avdarli Firat Selen Pinar Topcu Yilmaz Mehmet Numan Alp 2019国际眼科杂志2019,19,8:2
11Blood pressure-independent attenuation of cardiac hypertrophy by AT (1)R-AS gene therapy显示文摘Pachori AS Numan MT Ferrario CM 2002Hypertension2002,39,5:1
12Numerical analysis to solve the hydraulics of trickle irrigation units显示文摘Numan Mizyed 2002Irrigation and Drainage Systems2002,16,1:1
13Evaluation of the hippocampus and the anterior cingulate gyrus by proton MR spectroscopy in patients with post-traumatic stress disorder显示文摘Kamran M Numan K Hüseyin (O) 2005Diagn Inte-rvent Radiol2005,11,3:1
14Endovascular treatment of left carotid artery to left subclavian vein AV fistula due to stab injury: case report 显示文摘Numan F Arbatli H Arpaz M 2008Ulus Travma Acil Cerrahi Derg2008,14,1:1
15Opportunities andmethodological challenges in EEG and MEG resting state functionalbrain network research 显示文摘Van Diessen E Numan T van Dellen E 2015Clin Neurophysiol2015,126,:1
16Silicon morphology modification in the eutectic AI-Si alloy using mechanical mold vibration 显示文摘Abu-Dheir Numan Khraisheh Marwane 2005Materials Science and Engineering2005,393,2:1
17Stress analysis of shape memory alloys used in wind turbine blade root connection显示文摘KUCUK MUMIN CETIN NUMAN S EMEKSIZ CEM 0,,:1
18Adsorption kinetics and isotherms ofpesticides onto activated carbon-cloth显示文摘EROL A NUMAN H 2005Chemosphere2005,60,11:1
19Blood pressure-independent attenuation of cardiac hypertrophy by AT1R-AS gene therapy显示文摘Pachori AS Numan MT Ferrario CM 2002Hypertension2002,39,5:1
20Short-term treatment with proton-pump inhibitors as test for gastoesophageal reflux disease:a Meta-analysis of diagnostic test characteristics显示文摘Numans ME Lau J De-Wtt NJ 0,,:1
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