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Towards adaptable and tunable cloud-based map-matching strategy for GPS trajectories

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Frontiers of Information Technology & Electronic Engineering 2016年第12期17卷 1305-1319页

作者： Aftab Ahmed chandio Nikos TZIRITAS Fan ZHANG Ling YIN Cheng-Zhong XU Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China Institute of Mathematics and Computer Science University of Sindh Jamshoro 70680 Pakistan Department of Electrical and Computer Engineering Wayne State University Detroit 48202 USA

智慧城市为智能交通管理和交通网络智能应用的发展提供了巨大推动力。近来,智能交通系统(Intelligent transportation systems,ITSs)和移动位置服务(Location-based services,LBSs)也成为了研究领域的热点。交通领域数据量在快速不断增... 详细信息

智慧城市为智能交通管理和交通网络智能应用的发展提供了巨大推动力。近来,智能交通系统(Intelligent transportation systems,ITSs)和移动位置服务(Location-based services,LBSs)也成为了研究领域的热点。交通领域数据量在快速不断增长,云计算在巨量数据的存储、接入、管理和处理方面有着巨大作用。交通领域相当比例的数据为GPS数据,此类数据具有非频繁、含噪声等特性,这使得维护基于GPS的实时交通软件的服务质量较为困难。在诸多智能交通系统应用中,地图匹配处理起着将GPS观测点准确排列于路网中的关键作用。考虑到准确性时,地图匹配策略的性能由两个连续的GPS观测点间的最短路径决定;另一方面,处理最短路径查询(Processing shortest path queries,SPQs)耗费着较高计算量。现有的地图匹配技术采用固定参数(固定的候选点数量,固定的误差圆半径)的办法,这可能导致确认线路分段时产生不确定性,也可导致低精度结果(或需进行大量SPQ处理以保证精度)。此外,由于采样错误的存在,较高采样时间(大于10 s)内的GPS数据常含有冗余数据,这也导致需要额外的SPQ处理。由于SPQ处理导致的高运算量问题,现有的地图匹配策略并不能实现实时应用。在本文中,我们提出一种实时地图匹配方法(Real-time map-matching,RT-MM)。该方法以云计算为基础,是一种全自适应地图匹配策略,能够应对实时GPS轨迹地图匹配中SPQ处理的关键问题。本研究还通过基于虚拟数据和实际数据的仿真,对所述方法与现有方法的性能进行了比较。

关键词：地图匹配 GPS轨迹可调节云计算块同步并行计算(Bulk synchronous parallel,BSP)

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液氨预处理工艺对五节芒酶解糖化效果的影响

农业机械学报 2016年第7期47卷 196-201页

作者：彭何欢邵千钧 Farman ali chandio 赵超李彬马中青浙江农林大学工程学院杭州311300 宁波大学机械工程与力学学院宁波315211 信德农业大学农业工程学院登多贾姆70060

为提高五节芒可发酵单糖的产量,采用液氨对其进行预处理。选用预处理温度T、五节芒含水率M、驻留时间t和液氨用量比k为变量因素,在试验范围内T（70～170℃）、M（20%～200%）、t（5～30 min）、k（0.5～5.0）通过对各因素的不同取值,分... 详细信息

为提高五节芒可发酵单糖的产量,采用液氨对其进行预处理。选用预处理温度T、五节芒含水率M、驻留时间t和液氨用量比k为变量因素,在试验范围内T（70～170℃）、M（20%～200%）、t（5～30 min）、k（0.5～5.0）通过对各因素的不同取值,分析上述因素对五节芒酶解效果的影响。结果表明：在T=130℃、M=80%、t=10 min、k=2.0的条件下预处理,五节芒72 h的葡聚糖和木聚糖酶解率分别为72.1%和82.5%,即100 g干基原材料可获得可发酵单糖55.8 g,是未经预处理样品酶解率的3.65倍。因此,液氨预处理能够有效促进五节芒的酶解单糖转化率。

关键词：五节芒预处理液氨酶解

Dual solutions of time-dependent magnetohydrodynamic stagnation point boundary layer micropolar nanofluid flow over shrinking/stretching surface

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Applied Mathematics and Mechanics(English Edition) 2021年第7期42卷 1013-1028页

作者： H.B.LANJWANI M.S.chandio M.I.ANWAR S.A.SHEHZAD M.IZADI Department of Mathematics University of SindhJamshoro 76080Pakistan Department of Mathematics Engineering University SargodhaSargodha 40100Pakistan Department of Mathematics COMSATS University IslamabadSahiwal 57000Pakistan Department of Mechanical Engineering Faculty of EngineeringLorestan UniversityKhorramabad 68151-44316Iran

Time-dependent,two-dimensional(2 D)magnetohydrodynamic(MHD)micropolar nanomaterial flow over a shrinking/stretching surface near the stagnant point is *** and heat transfer characteristics are incorporated in the problem.A model of the partial differential expressions is altered into the forms of the ordinary differential equations via similarity *** obtained equations are numerically solved by a shooting scheme in the MAPLE *** solutions are observed at different values of the specified physical *** stability of first and second solutions is examined through the stability analysis *** analysis interprets that the first solution is stabilized and physically feasible while the second one is un-stable and not ***,the natures of various physical factors on the drag force,skin-friction factor,and rate of mass and heat transfer are determined and *** micropolar nanofluid velocity declines with a rise in the suction and magnetic parameters,whereas it increases by increasing the unsteadiness *** temperature of the micropolar nanofluid rises with increase in the Brownian motion,radiation,thermophoresis,unsteady and magnetic parameters,but it decreases against an increment in the thermal slip constraint and Prandtl *** concentration of nanoparticles reduces against the augmented Schmidt number and Brownian movement values but rises for incremented thermophoresis parameter values.

关键词： dual solution stability analysis micropolar nanofluid magnetic field stretching/shrinking surface

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Journal of Harbin Institute of Technology(New Series) 2021年第1期28卷 62-70页

作者： Muhammad Basit chandio Ani Luo Yaohui Li Sanaullah Khushak Asif Raza College of Mechanical&Electrical Engineering Harbin Engineering UniversityHarbin 150001China

Tensegrity structures have identical members in an orientation that have correlated dynamics under external *** study this interdependent dynamics in different members in compression and expansion processes,it is vital to analyze the dynamics of the whole *** this study,six bar tensegrity structure was studied under compression and expansion,and interdependent movement of different members of the structure in both processes was ***,the relationship between external force and members force densities was analytically developed based on the assumption that each bar moves with the same distance when an external force is applied on the six bar tensegrity ball structure along one plane that either compresses or expands the ***,two individual simulations were carried out to analyze the movement of each bar in compression and expansion under the effect of external force,and elongation in all strings was studied in both ***,comparative dynamic study of different members in compression and expansion of the structure with the effect of external force was performed,which were categorized according to dynamic symmetry.

关键词： tensegrity compression and expansion interdependent dynamics dynamic symmetry

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小麦茎秆力学性能的国内外研究

中国农机化学报 2014年第6期35卷 304-308页

作者：方会敏姬长英张庆怡 Farman ali chandio 南京农业大学工学院南京市210031

小麦是我国主要粮食经济作物。本文对其茎秆的拉伸、剪切、弯曲、压缩等力学性能的研究进展进行了简要回顾,对现有研究存在的不足进行了简要分析。国内外的相关研究均忽略了小麦茎秆上鞘的存在对小麦茎秆力学性能的影响,鲜有文献分析小... 详细信息

小麦是我国主要粮食经济作物。本文对其茎秆的拉伸、剪切、弯曲、压缩等力学性能的研究进展进行了简要回顾,对现有研究存在的不足进行了简要分析。国内外的相关研究均忽略了小麦茎秆上鞘的存在对小麦茎秆力学性能的影响,鲜有文献分析小麦茎秆的力学性质与机具的相互作用。将小麦茎秆力学性能与现有的仿真分析技术结合,将有利于小麦茎秆力学性能的发挥及农业机械的设计与优化。

关键词：茎秆拉伸剪切弯曲压缩

植保无人飞机作业参数对田外除草靶标区内外雾滴沉积规律的影响

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中国农机化学报 2021年第8期42卷 74-82页

作者： Fiaz Ahmad 邱白晶董晓娅马靖黄鑫 Shibbir Ahmed Farman ali chandio 蔡晨(译) 江苏大学农业工程学院江苏镇江212013 巴哈丁拉齐大学农业科学与技术学院农业工程系巴基斯坦木尔坦60800 信德省农业大学农业工程学院农业动力与机械系巴基斯坦坦杜阿拉亚70060 农业农村部南京农业机械化研究所

雾滴大小、气象条件和施药装备的作业参数对雾滴的覆盖范围、靶标的吸附性能有影响。无人飞机(UAV)是目前有助于高效喷雾的现代施药技术装备。然而作业参数对靶标区和脱靶区的影响依然尚待确定。开展了田间试验并运用沉积扫描软件测定... 详细信息

雾滴大小、气象条件和施药装备的作业参数对雾滴的覆盖范围、靶标的吸附性能有影响。无人飞机(UAV)是目前有助于高效喷雾的现代施药技术装备。然而作业参数对靶标区和脱靶区的影响依然尚待确定。开展了田间试验并运用沉积扫描软件测定了在田外除草中不同飞行高度(2 m和3 m)和飞行速度(2 m/s和3 m/s)下雾滴的沉积量、覆盖密度、覆盖率和雾滴直径。结果表明,当无人飞机在处理T_(1)中以2 m/s速度、2 m高度飞行时,靶标区域平均沉积量最高,为2.29μL/cm^(2),飞行航线中央0点位置的覆盖率达到36.19%。处理T_(1)、T_(2)、T_(3)和T_(4)在飞行航线中央的雾滴谱相对宽度分别为0.70、1.01、1.03、1.05。处理T_(1)体积中值直径(VMD,也即D_(v0.5))最大,为448.75μm;而处理T_(4)的D_(v0.5)最小,为238.95μm。单旋翼无人飞机在脱靶区的沉积量几乎可以忽略不计。本研究为无人飞机运营商、农民和生产企业提供了参考,从而优化航空植保技术在除草上的应用。

关键词：无人机喷雾器航空施药作业参数脱靶区喷雾沉积

Synthesis, Crystal Structure and Antimicrobial Activity of {[Bis(pyridine-κN)bis(3,5-dinitrosalicylato κ-O,O')Zn(Ⅱ)][bis(pyridine-κN)Zn(Ⅱ)]}

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Chinese Journal of Structural Chemistry 2016年第5期35卷 705-712页

作者： CHANG Fouzia MEMON Najma AHMED Muhammad Naeem TAHIR Muhammad Nawaz MEMON Shahabuddin CHANG Abdul Sattar BHANGER Muhammad Iqbal chandio Anwer National Centre of Excellence in Analytical Chemistry University of Sindh Department of Chemistry The University of Azad Jammu and Kashmir Department of Physics University of Sargodha HEJ Research Institute of Chemistry ICCBS University of Karachi

A novel {[bis（pyridine-κN）bis（3,5-dinitrosalicylato κ-O,O＇）Zn（Ⅱ）][bis（pyridine-κN）Zn（Ⅱ）]}（C_（34）H_（24）N_8O_（14）Zn_2） was synthesized by a self-assemble method at room temperature. The molecular structure was determined by single-crystal X-ray analysis. The compound crystallizes in the monoclinic system, space group P2_1/n with a = 12.2156, b = 13.5696, c = 22.5602 A, β = 90.061o, Z = 4 and V = 3739.6（3）A^3. The new 1D binuclear coordination polymer {[bis（py-κN）bis（3,5-dinitrosal κ-O,O′） Zn（Ⅱ）][bis（py-κN）Zn（Ⅱ）]} resulted from two different types of moieties. The polymer [bis（py-κN）bis（3,5-dinitrosal κ-O,O′）Zn（Ⅱ）] unit is connected with [bis（py-κN） Zn（Ⅱ）] by zigzag topology. One zinc（Ⅱ） cation has a six-fold coordination environment, in which the metal atom is connected with four oxygen atoms of two 3,5-dinitrosalicylic acids to form equatorial bonds and two nitrogen atoms of pyridine to generate the axial bonds. Other four-fold nucleus contain two Zn-O bonds from different 3,5-dinitrosalicylic acids and two bonds with the Natom of pyridine. Antimicrobial assay results indicated that the compound showed moderate activities against different bacterial and fungal strains.

关键词： crystal structure antimicrobial pyridine C-H…π interactions

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秸秆分拨引导式玉米免耕防堵机构设计与试验

农业机械学报 2019年第8期50卷 52-58页

作者：牛萌萌方会敏 chandio F A 史嵩薛艳芳刘虎山东省农业机械科学研究院济南250100 信德农业大学农业工程学院坦杜阿拉亚70060 山东省农业科学院玉米研究所济南250100

为解决免耕播种机麦茬地作业的拥堵问题,在拨抛式防堵装置的基础上提出秸秆分拨引导的防堵设计思路,设计了阿基米德螺线型防堵机构。该装置可引导秸秆攀升,实现层叠堆积,缓解秸秆平行拨离苗带时造成的秸秆局部集中,从而实现有效防堵。... 详细信息

为解决免耕播种机麦茬地作业的拥堵问题,在拨抛式防堵装置的基础上提出秸秆分拨引导的防堵设计思路,设计了阿基米德螺线型防堵机构。该装置可引导秸秆攀升,实现层叠堆积,缓解秸秆平行拨离苗带时造成的秸秆局部集中,从而实现有效防堵。运用离散元分析软件EDEM 2.7,建立了秸秆土壤防堵机构相互作用的仿真模型,分别对单个目标秸秆和秸秆群体进行运动追踪,验证了分拨引导和层叠堆积理念。对试验样机进行了田间性能试验和作业参数优选试验,结果表明:在播种过程中,阿基米德螺线型防堵机构作业顺畅,未发生中、重度堵塞及晾籽;防堵机构最佳工作参数为前进速度7 km/h、转速600 r/min,此时秸秆清除率最高,为92.6%。本文设计的防堵机构性能优于前期课题组设计的防堵机构和某商品化防堵机构。

关键词：玉米免耕播种机防堵机构分拨引导阿基米德螺线

Development of Household Care Chemical Industry in Pakistan

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China Detergent & Cosmetics 2016年第2期1卷 30-32页

作者： Kashif Hussain Mangi Zubair Ahmed chandio Fareed Hussain Mangi Department of Chemical Engineering QUEST Nawabshah Pakistan Department of Energy & Environment Engineering QUEST Nawabshah Pakistan

Overview The household care chemical industry in Pakistan is very assorted with wide ranging home and personal care （HPC）products and commercial producers. Currently, Proctor & Gamble, Unilever, and Colgate Palmolive Pakistan are major contributors in this industry. [1] All major brands of these companies are available in Pakistan. A break up of HPC categories is given the Figure 1.

关键词：化学工业发展现状巴基斯坦市场分析