|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 基于Hadoop的RDF数据存储及查询优化显示文摘随着资源描述框架(resource description framework,RDF)数据量的快速增长,利用分布式的方法来存储和管理大规模RDF数据成为当前的研究热点。为了实现对海量RDF数据的高效存储和查询,研究了RDF三元组在分布式平台Hadoop中的存储和查询方法,提出了一种新的基于Hadoop的RDF数据处理优化方法,通过采用基于HBase混合式数据布局方法以及引入MapReduce连接查询的I/O代价模型来对海量RDF数据的查询进行优化。在LUBM标准测试数据集中进行了实验,结果表明该方法能够在保证空间效率的前提下,有效地提高复杂查询的效率。 | 徐德智 刘扬 Sarfraz Ahmed | 2017 | 计算机应用研究2017，34，2： | 14 |
| 2 | Somatic embryogenesis in wild relatives of cotton (Gossypium Spp.)显示文摘Wild cotton species can contribute a valuable gene pool for agronomically desirable cultivated tetraploid cultivars. In order to exploit diploid cotton a regeneration system is required to achieve transformation based goals. The present studies aimed at optimizing the conditions for regeneration of local varieties as well as wild species of cotton. Different callus induction media were tested with varying concentrations of hormones in which sucrose was used as nutritional source. Different explants (hypo-cotyls, cotyledon, root) were used to check the regeneration of both local cotton plants and wild relatives using T & G medium, BAP medium, CIM medium, EMMS medium, and cell suspension medium. Different stages of embryogenicity such as early torpedo stage, late torpedo stage, heart stage, globular stage and cotyledonary stage were observed in wild relatives of cotton. The results of this study pave the way for establishing future transformation methods. | RAO Abdul Qayyum HUSSAIN S. Sarfraz SHAHZAD M. Saqib BOKHARI S. Yassir Abbas RAZA M. Hashim RAKHA Allah MAJEED A. SHAHID A. Ali SALEEM Zafar HUSNAIN Tayyab RIAZUDDIN S. | 2006 | Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2006，7，4： | 9 |
| 3 | 陆地棉亲本间遗传距离与杂种优势的相关性研究显示文摘【目的】通过1 500个陆地棉杂交组合分析杂种优势与其亲本间数量性状遗传距离的相关性,探讨能否利用大规模杂交组合亲本间遗传距离提高陆地棉杂种优势预测效果,以期为棉花杂交育种和杂种优势利用提供理论指导。【方法】选择来自15个国家和中国23个省(市)的305份陆地棉核心种质为亲本,采用L×T(Line×Tester)杂交设计配制1 500个杂交组合。2012—2013年,在中国南北方13个生态环境下考察其株高、单铃重、衣分、纤维长度等10个产量和纤维品质相关性状,分析F1杂种优势、亲本间遗传距离和群体结构,并采用4种方式(Cor1—Cor4)计算遗传距离与杂种优势的相关性。【结果】10个性状中亲优势(MPH)均值的变幅为1.70%—7.40%,平均为4.36%,按父本不同将F1分成5组(A—E),其MPH均值A>E>B>C>D;超亲优势(HB)均值的变幅为-4.17%—1.87%,平均为-0.17%,A、B和E组的HB均值皆为正。10个性状在5组中除D、E组的马克隆值之外,其他性状普遍具有明显的中亲优势,其中,单铃重和纤维长度的中亲优势在5组中均以正优势为主(达80%以上),最大值分别为34.01%和9.83%,对应的超亲优势分别为24.25%和5.80%。F1和亲本差异显著性分析表明单铃重、株高、纤维长度、伸长率和整齐度指数整体表现出一定的超亲优势。父本(测试种)与300个母本之间的遗传距离介于2.280—61.430,平均为21.550,5个测试种与母本间的平均遗传距离D>C>E>A>B,其中,最近值为11.721,最远值为33.271。按最小方差聚类,将305个陆地棉亲本划分为2个主群,包括5个亚群。4种遗传距离与杂种优势的相关性分析结果显示,因样本量、遗传距离变幅和父本不同其结果有所差异,相关性随样本量的增大而有所增强。其中,Cor1是Cor2结果的整体体现;Cor3与Cor1和Cor2相比,部分性状的中亲优势与遗传距离的相关性有所不同;Cor4的相关性最弱。综合来看,遗传距离与衣分、断裂比强度、整齐度指数和纺纱均匀性指数的中亲优势呈显著正相关,遗传距离与其他性状的中亲优势的相关性因采用的分析方案不同,结果有所不同;在4种方案中,除整齐度指数外,遗传距离与超亲优势的相关性整体表现负相关。其中,遗传距离与马克隆值、纤维长度和衣分的超亲优势相关性较强。【结论】陆地棉亲本间数量性状遗传距离与杂种优势有一定的线性关系,不同性状的杂种优势与遗传距离的相关性存在正负和强弱差异,且样本量越大相关性越强。说明基于大规模杂交组合研究陆地棉亲本间遗传距离与杂种优势的关系效果显著。 | 曲玉杰 孙君灵 耿晓丽 王骁 Zareen Sarfraz 贾银华 潘兆娥 何守朴 龚文芳 王立如 庞保印 杜雄明 | 2019 | 中国农业科学2019，52，9： | 9 |
| 4 | Pancreatic necrosis:Complications and changing trend of treatment显示文摘Incidence of acute pancreatitis seems to be increasing in the Western countries and has been associated with significantly increased morbidity. Nearly 80% of the patients with acute pancreatitis undergo resolution; some develop complications including pancreatic necrosis. Infection of pancreatic necrosis is the leading cause of death in these patients. A significant portion of these patients needs surgical interventions. Traditionally, the 'gold standard' procedure has been the open surgical necrosectomy, which is now being completed by the relatively lesser invasive interventions. Minimally invasive surgical(MIS) procedures include endoscopic drainage, percutaneous image-guided catheter drainage, and retroperitoneal drainage. This review article discusses the open and MIS interventions for pancreatic necrosis with each having its own respective benefits and disadvantages are covered. | Mamoon Ur Rashid Ishtiaq Hussain Sundas Jehanzeb Waqas Ullah Saeed Ali Akriti Gupta Jain Neelam Khetpal Sarfraz Ahmad | 2019 | World Journal of Gastrointestinal Surgery2019，11，4： | 7 |
| 5 | 炭化温度和时间对不同废菌棒生物炭结构性质的影响显示文摘【目的】生物炭的表面性质与其表面的官能团密切相关,探讨不同制备条件对不同材料废菌棒生物炭结构特征的影响可为废菌棒的资源化有效利用提供依据。【方法】以海鲜菇、秀珍菇、银耳的废菌棒为生物质原料,采用限氧裂解法在不同温度(400、500、600、700℃)和不同时间(1.5、2.0、2.5、3.0 h)下制备生物炭,采用傅里叶红外光谱法(FTIR)对不同废菌棒生物炭结构性质进行表征。【结果】随着炭化温度的升高和炭化时间的延长,3种菌棒生物炭蛋白质中C=O、C-N、纤维素中C-O-C、脂肪烃中-CH3和-CH2基团的相对含量都随之减少;苯环中的C-H官能团相对含量随之减少,C-C官能团相对含量随之增大,且在700℃,炭化3.0 h条件下达到最大。在相同制备条件下,海鲜菇菌棒生物炭含氧官能团吸收峰峰强最强,银耳菌棒生物炭最弱;秀珍菇菌棒生物炭苯环CC吸收峰峰强最强,银耳菌棒生物炭最弱。【结论】随着炭化温度的升高和炭化时间的延长,生物炭中的蛋白质、多糖和脂肪酸等有机物质逐渐分解,烷基基团缺失,而芳香结构逐渐形成,在700℃,炭化3.0 h条件下生物炭结构最稳定。在3种菌棒生物炭中,海鲜菇菌棒生物炭对于重金属或有机污染物的吸附能力可能最强,秀珍菇菌棒生物炭施入土壤后固碳效果可能最好。 | 李思苇 Sarfraz Rubab 杨文浩 毛艳玲 周碧青 邢世和 | 2019 | 福建农业学报2019，34，10： | 4 |
| 6 | EARLY FLOWERING IN SHORT DAYS(EFS) regulates the seed size in Arabidopsis显示文摘Post-transcriptional modifications,including histone modifications and DNA methylation,alter the chromatin landscape to regulate gene expression,thus control various cellular processes in plants.EARLY FLOWERING IN SHORT DAYS(EFS)is the major contributor for H3K36 methylation in Arabidopsis and is important for plant development.Here,we find that EFS is expressed in different stages of embryo morphogenesis,and the efs mutant produces larger embryo that results in enlarged seeds.Further analysis reveals that an imprinted gene MOP9.5 is hypomethylated at the promoter region and its expression is derepressed in efs mutant.MOP9.5 promoter is marked by various epigenetic modifications,and we find that following the increase of H3K36me3,H3K27me3 and H3K9me2 levels are reduced in efs mutant.This data indicates an antagonistic regulation between H3K36me3 and DNA methylation,and/or H3K27me3 at MOP9.5.Our results further show that both maternal and paternal EFS alleles are responsible for the seed size regulation,which unraveled a novel function of EFS in plant development. | Lingling Cheng Sarfraz Shafiq Wei Xu Qianwen Sun | 2018 | Science China(Life Sciences)2018，61，2： | 4 |
| 7 | Sedimentary facies interpretation of Gamma Ray(GR)log as basic well logs in Central and Lower Indus Basin of Pakistan显示文摘Rocks and most type of soils emit Gamma Ray(GR) in varying amount.The emitting elements of primary gamma radiations include potassium 40,uranium,and thorium which are associated with rocks forming minerals in variable amount.GR log is used to predict the varying lithology in borehole by measuring the spontaneous emission of GR radiation from rocks.Role of GR logs in the identification of subsurface facies is the main focused research theme of this manuscript including with objective of brief introduction of GR log and its applications in the identification of facies in the field of Petroleum Geosciences by analyzing the examples of GR log(s) from wells,Lower Indus Basin,Pakistan. | Adeel Nazeer Shabeer Ahmed Abbasi Sarfraz Hussain Solangi | 2016 | Geodesy and Geodynamics2016，7，6： | 4 |
| 8 | Tectonic evolution of structures in Southern Sindh Monocline,Indus Basin,Pakistan formed in multi-extensional tectonic episodes of Indian Plate显示文摘There are a number of structures and structural styles found in extensional tectonic settings of the world,and it is a big challenge to study the evolution of these structures. Evolution of structures formed in extensional tectonic settings have been studied by researchers on different extensional basins of the world. Southern Sindh Monocline lies on the western corner of Indian Plate and the tectonic history of Indian plate has also experienced different extensional episodes, and its journey rifted from Gondwanaland to its final welding to Asia. The aim of this study is to figure out the evolution of structures in the subsurface of Southern Sindh Monocline, Pakistan using the seismic data interpretation and flattening of horizons approach. Structures within the subsurface of Southern Sindh Monocline have been characterized by different tectonic episodes of Indian plate while rifting from Gondwanaland, rifting from other plates at different geological times and to its collision with the Asia. Basic structures within study area are classified into nine types while the structural styles have been classified into six types as horst and grabens, dominos, crotch, synthetic and antithetic, negative and flashlight structural style. The structures within the study area revealed evidence for three major structural episodes which can be characterized as Episode 1: Structures associated with rifting of Indian plate from Gondwanaland during Late Jurassic to Early Cretaceous, Episode 2: Modification and reactivation of previous structures while Madagascar rifted from Indian Plate during the Middle Cretaceous and during Episode 3: Inversion and reactivation of structures occurred when Indian Plate collided with Asia during Early Eocene. | Shabeer Ahmed Sarfraz Hussain Solangi Muhammad Saeed Khan Jadoon Adeel Nazeer | 2018 | Geodesy and Geodynamics2018，9，5： | 3 |
| 9 | 崩塌滑坡堵江堰塞湖灾害链铁路减灾选线策略显示文摘青藏高原南缘是崩塌滑坡堵江形成堰塞湖灾害链的高风险区,而我国铁路缺乏应对堰塞湖灾害的经验。铁路灾后改建工程线路优化设计将产生直接减灾效益,而新建铁路在选线阶段就采取一些主动减灾策略,也是风险调控的重要手段。为此,以中巴经济走廊中拟建哈维连至喀什铁路Attabad堰塞湖段为研究对象,根据堰塞湖灾害特点,通过将改建工程分段设计,并对不同改建线路方案进行技术经济指标比较,完成该段改建线路设计。基于上述工作,提出以有利地形控制溢流口开挖深度、宜尽量利用既有工程、在离开湖区后集中展线尽快与既有线联接、有条件时可提高限制坡度等灾后绕湖铁路选线设计要点与高位选线、酌情预留提高限坡措施的条件、尽量不跨河等新建铁路减灾选线设计策略,希望为铁路应对崩塌滑坡堵江堰塞湖灾害链提供参考。 | 王承振 姚令侃 黄艺丹 Sarfraz Ali | 2019 | 铁道标准设计2019，63，6： | 3 |
| 10 | Productive performance, egg quality, hematological parameters and serum chemistry of laying hens fed diets supplemented with certain fat-soluble vitamins, individually or combined, during summer season显示文摘This present study aimed to determine the efficacy of supplementing layer diets with vitamin A(0, 8,000 and16,000 IU/kg diet) and vitamin E(0, 250 and 500 mg/kg diet) either individually or in combination on egg production and quality, and blood hematology and chemistry of birds reared under summer conditions. A total of 135 Bovans Brown laying hens were distributed to 9 treatment groups with 5 replicates of 3 hens/pen in a 3 × 3 factorial design. A significant improvement in feed conversion ratio(FCR) was observed as supplementary vitamin A or E increased(P 0.01). Hens fed diets supplemented with 16,000 IU vitamin A plus 500 mg vitamin E/kg diet had the best FCR among all groups. Egg quality traits were not significantly affected by the interaction of vitamin A and vitamin E levels. There was a significant increase in monocytes(P ≤ 0.01)and a decrease in basophils counts(P ≤ 0.05) in response to vitamin E. Significant decreases were observed in packed cell volume(PCV), thyroxine(T_4), alanine transferase(ALT), albumin, total cholesterol and total lipids((P ≤ 0.05 or P ≤ 0.01) P 0.01), and increases were observed in serum concentrations of globulin(P ≤ 0.05)and calcium(P ≤ 0.01) due to vitamin A. The combination of 0 IU vitamin A and 500 mg vitamin E/kg diet had the highest values of PCV(40.09%) and hemoglobin(Hb)(10.33 mg/100 mL) among all groups. Vitamin E raised serum values of total protein, total cholesterol and total lipids(P ≤ 0.05 or P≤ 0.01). Feed intake, FCR,PCV, Hb, lymphocytes, monocytes, eosinophils, T_4, ALT and total protein were significantly affected by the interaction of vitamins A and E(P ≤ 0.05 or P ≤ 0.01). The interaction of vitamins A and E was only significant with respect to serum total protein(P ≤ 0.05). It can be concluded that layer diets supplemented with vitamins A and E had good results in alleviating the harmful impacts of high ambient temperature. The combination of 16,000 IU vitamin A and 500 mg vitamin E per kilogram diet is preferable for obtaining better production of laying hens reared under hot summer conditions. | Mohamed E.Abd El-Hack Mahmoud Alagawany Khalid M.Mahrose Muhammad Arif Muhammad Saeed Muhammad A.Arain Rab N.Soomro Farman A.Siyal Sarfraz A.Fazlani Justin Fowler | 2019 | Animal Nutrition2019，，1： | 3 |
| 11 | Surfactant-decorated graphite nanoplatelets(GNPs) reinforced aluminum nanocomposites: sintering effects on hardness and wear显示文摘The exceptional properties of graphene make it ideal as a reinforcement to enhance the properties of aluminum matrices and this critically depends on uniform dispersion. In this study, the dispersion issue was addressed by sonication and non-covalent surface functionalization of graphite nanoplatelets(GNPs) using two types of surfactant: anionic(sodium dodecyl benzene sulfate(SDBS)) and non-ionic polymeric(ethyl cellulose(EC)). After colloidal mixing with Al powder, consolidation was performed at two sintering temperatures(550 and 620°C). The structure, density, mechanical and wear properties of the nanocomposite samples were investigated and compared with a pure Al and a pure GNPs/Al nanocomposite sample. Noticeably, EC-based 0.5 wt% GNPs/Al samples showed the highest increment of 31% increase in hardness with reduced wear rate of 98.25% at 620°C, while a 22% increase in hardness with reduced wear rate of 96.98% at 550°C was observed, as compared to pure Al. Microstructural analysis and the overall results validate the use of EC-based GNPs/Al nanocomposites as they performed better than pure Al and pure GNPs/Al nanocomposite at both sintering temperatures. | Zeeshan Baig Othman Mamat Mazli Mustapha Asad Mumtaz Sadaqat Ali Mansoor Sarfraz | 2018 | International Journal of Minerals,Metallurgy and Materials2018，25，6： | 3 |
| 12 | 冰川区铁路选线要点——以中巴经济走廊为例显示文摘中巴经济走廊是“一带一路倡议”的先试区和重点项目区,拟建中巴铁路是其重要组成部分,但铁路行经的喀喇昆仑山脉为全球山谷冰川最发育的区域,我国尚无在冰川区修建铁路的经验。鉴此,以中巴经济走廊Gilgit至Khunjerb段为研究区,研究沿线大陆性冰川、海洋性冰川和跃动冰川的分布以及各类冰川的活动性特点,定义冰川直接作用区和间接作用区且分析相应的成灾模式,并据此提出选线要点;最后针对中巴铁路沿线四大冰川群,分别提出选线设计建议。研究成果对冰川区铁路选线设计具有普适性指导意义。 | 韩笑 姚令侃 魏永幸 黄艺丹 Sarfraz Ali | 2020 | 铁道科学与工程学报2020，17，10： | 3 |
| 13 | DNA Topoisomerase 1 Prevents R-loop Accumulation to Modulate Auxin-Regulated Root Development in Rice显示文摘R 环结构(RNA : DNA 混血儿) 在多样的有机体之中在许多生物进程,包括的 transcriptional 规定和染色体不稳定性有重要函数。DNA topoisomerase 1 (TOP1 ) , DNA 拓扑学的一个必要操纵者在 RNA 抄写和 DNA 复制期间处理,能由移开被 RNA 聚合酶在抄写期间做的积极、否定的 DNA supercoiling 阻止 R 环累积。TOP1 为植物开发被要求,但是很少在在植物在各种各样的生物进程阻止 co-transcriptional R 环累积对它的函数被知道。这里,我们显示出那击倒 OsTOP1 强烈影响米饭开发,在根建筑学和 gravitropism 引起缺点,它是植物生长素发信号和 transporter 基因的错误规定的后果。我们发现 R 环自然地在米饭被形成植物生长素相关的基因 loci,和 overaccumulate 当 OsTOP1 被击倒或 OsTOP1 蛋白质活动被禁止时。OsTOP1 因此将植物生长素相关的基因的精确表示层次放由阻止固有的 R 环的 overaccumulation。我们的数据表明在极的植物生长素的 R 环同样重要的因素搬运并且种 OsTOP1 作为一把钥匙工作与植物连接 transcriptional R 环的根开发,和热点荷尔蒙发信号,提供新卓见进荷尔蒙在植物发信号的 transcriptional 规定。 | Sarfraz Shafiq Chunli Chen Jing Yang Lingling Cheng Fei Ma Emilie Widemann Qianwen Sun | 2017 | Molecular Plant2017，10，6： | 2 |
| 14 | 中巴经济走廊沿河台地特征及铁路选线要点显示文摘中巴经济走廊是我国'一带一路'倡议的先试区和重点项目区,拟建中巴铁路是其重要组成部分。走廊区域经历了多次强隆升作用和冰川作用,存在河流阶地、洪积扇、泥石流扇、冰碛台地等沿河台地。以中巴经济走廊Thakot至Khunjerab段为研究区段,归纳总结各类沿河台地的分布特征以及铁路选线的可利用性。结果表明:由于强隆升作用导致河流阶地拔河高度较大并出现了泥石流扇抬升后成为流通区的现象,Ⅰ级阶地和老扇面区成为可利用的地形;小冰期时冰川活动未企及的冰碛台地也可利用。研究结果有益于中巴铁路线路方案的优化。 | 赵亚祥 姚令侃 魏永幸 黄艺丹 Sarfraz Ali | 2020 | 铁道建筑2020，60，7： | 2 |
| 15 | Seismic stability analysis of slopes with pre-existing slip surfaces显示文摘In analyzing seismic stability of a slope with upper bound limit analysis method, the slip surface is often assumed as a log-spiral or plane slip surface. However, due to the presence of a weak layer and unfavorable geological structural surface or a bedrock interface with overlying soft strata, the preexisting slip surface of the slope may be irregular and composed of a series of planes rather than strictly logspiral or plane shape. A computational model is developed for analyzing the seismic stability of slopes with pre-existing slip surfaces. This model is based on the upper bound limit analysis method and can consider the effect of anchor bolts. The soil or rock is deemed to follow the Mohr-Coulomb yield criterion. The slope is divided into multiple block elements along the slip surface. According to the displacement compatibility and the associated flow rule, a kinematic velocity field of the slope can be obtained computationally. The proposed model allows not only calculation of the rate of external work owing to the combined effect of self-weight and seismic loading, but also that of the energy dissipation rate caused by the slip surface, interfaces of block elements and anchorage effect of the anchors. Considering a direct relationship between the rate of external work and the energy dissipation rate, the expressions of yield acceleration and permanent displacement of anchored slopes can be derived. Finally, the validity of this proposed model is illustrated by analysis on three typical slopes. The results showed that the proposed model is more easily formulated and does not need to solve complex equations or time consuming iterations compared with previous methods based on the conditions of force equilibrium. | su li-jun sun chang-ning yu fang-wei ali sarfraz | 2018 | Journal of Mountain Science2018，15，6： | 2 |
| 16 | Morphological features of continental shelf margin:Examples from the Pakistan Offshore显示文摘This paper describes various morphological features of continental shelf and their present-day analogues both present in surface and subsurface data. Most of the examples are taken from Pakistan Offshore.Identification of subsurface features from wireline logs and seismic data is very significant for the application of facies identification in the field of petroleum geosciences, sequence stratigraphy and sedimentology, which is based on the analysis of various lithological characteristic of facies, as well as their geometrical distributions in the basin. | Sarfraz Hussain Solangi Adeel Nazeer ShabeerAhmed Abbasi Mian Muhammad Zulkifil | 2019 | Geodesy and Geodynamics2019，10，1： | 2 |
| 17 | A rational cubic spline with tension显示文摘 | Gregory J A and Sarfraz M | 1990 | CAGD1990，，7： | 1 |
| 18 | Interactive curve design using C^2 rational splines 显示文摘 | Gregory J A Sarfraz M Yuen PK | 1994 | Computers and Graphics1994，18，： | 1 |
| 19 | A rational cubic spline for visualization of monotonic data显示文摘 | Sarfraz M | 2000 | Computers and Graphics2000，24，4： | 1 |
| 20 | A rational cubic spline for visualization of monotonic data:An alternate approach显示文摘 | Sarfraz M | 2003 | Computers and Graphics2003，，27： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员