检索结果-南通市图书馆

A New Paradigm for Waste Classification Based on YOLOv5

在线全文

学校读者我要写书评

暂无评论

Instrumentation 2021年第4期8卷 9-17页

作者： Mohammed sajid Nimali T MEDAGEDARA Department of Mechanical Engineering University of West of England Department of Mechanical En-gineering Faculty of Engineering TechnologyThe Open University of Sri LankaNugegodaSri Lanka

Classification of garbage is of paramount importance prior to process them to categorise physically and this process helps to manage wastes by maintaining pollution free *** systems that have capability segregate garbage are on the rise,but efficient and accurate segmentation with recognition mechanisms draw the attention of researchers.A computer vision approach for classifying garbage into respective recyclable categories could be one of the effective and economical ways of processing *** project mainly focused on capturing real-time images of a single piece of garbage and classifying it into three divisions:paper,or metal,or biodegradable(food)*** garbage class contains around 2000 images obtained from an open-source dataset and images collected from Google and personally collected custom *** developed intelligent models provide the effectiveness of the machine and deep learning in classification with structural and non-structural *** model used was a Convolutional Neural Network(CNN)named *** project showcased vision based approach capable of maintaining an accuracy of 61%.The CNN was not trained to its maximum capacity due to the difficulty of finding optimal hyperparameters,as most of the images were gathered from Google Images.

关键词： Waste Classification YOLOv5

Comparative study of living donor kidney transplants:Right vs left

在线全文

学校读者我要写书评

暂无评论

World Journal of Transplantation 2025年第1期15卷 115-123页

作者： Taqi Khan Nadeem Ahmad Qaisar Iqbal Muneeb Hassan Lajward Asnath Naveed Khan sajid Shakeel Kidney Transplant Unit Rehman Medical InstitutePeshawar 25100Khyber PakhtunkhwaPakistan Department of Surgery Princess Noura Binti AbdulRehman UniversityRiyadh 84428Saudi Arabia

BACKGROUND Transplant teams often hesitate to use the right kidney(RK)in living donor(LD)transplants due to the complexities of anastomosing the short,thin-walled right renal veins,which can potentially lead to graft loss or graft ***,circumstances may arise where selecting the RK over the left kidney(LK)is ***,it is crucial to thoroughly examine the implications of such a choice on the overall transplant *** To compare transplant outcomes between recipients of RK and LK while examining the factors that influence these *** We retrospectively analyzed data from adult patients who received LD kidney transplants involving meticulous patient selection and surgical techniques at our center from January 2020 to December *** included all kidney donors who were over 18,fit to donate,and had undergone diethylenetriamine pentaacetic acid split function and/or computed tomography based *** variables examined comprised donor and recipient demographics,and outcome measures included technical graft loss(TGL),delayed or slow graft function(SGF),and post-transplant serum creatinine(SC)*** used a logistic regression model to assess the likelihood of adverse outcomes considering the donor kidney *** Of the 250 transplants performed during the period,56(22%)were *** recipient demographics and transplant factors were comparable for the right and LKs,except that the donor warm and cold ischemia time were shorter for *** and SGF each occurred in 2%(n=1)of RKs and 0.5%(n=1)of LKs,the difference being *** complications,however,were not related to the venous *** RK(2%)developed delayed graft function after 48 hours,which was attributable to postoperative hypoxia rather than the surgical *** post-transplant SC trend and mean SC at the last follow-up were similar across both kidney *** The donor kidney side has little impact on post-transplant

关键词： Living donor Right kidney Right renal vein Venous anastomosis Technical graft loss Early graft function

Heat Transfer Enhancement of an Automobile Engine Radiator using ZnO Water Base Nanofluids

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

Journal of Thermal Science 2020年第4期29卷 1010-1024页

作者： Muhammad QASIM Muhammad sajid KAMRAN Muhammad AMMAR Muhammad ALI JAMAL Muhammad YASAR JAVAID Department of Mechanical Engineering University of Engineering and TechnologyLahore 54890Pakistan Department of Chemical Engineering Technology Government College UniversityFaisalabad 38000Pakistan Department of Mechanical Engineering Technology Government College UniversityFaisalabad 38000Pakistan

In this research paper, the forced convective heat transfer enhancement of a Suzuki Mehran(VXR) 2016 radiator(heat exchanger) along with pressure drop and friction factor by utilizing Zinc oxide(Zn O) water based nanofluids has been experimentally studied. Three types of nanofluids with different volumetric concentrations of Zn O nanoparticles(0–0.3%) were employed in order to understand its effect on heat transfer enhancement. The experimental setup was completely designed as closely as possible to the car cooling system. The experimentation has been done under laminar flow conditions(186≤Re≤1127) at different fluid volume flow rates(2–12 L/min) and constant fluid inlet temperature(70°C) to the automobile radiator. A maximum enhancement in heat transfer rate, overall heat transfer coefficient and Nusselt number was obtained up to 41%, 50% and 31% by using nanofluid with 0.2% volumetric concentration of nanoparticles respectively. On the other hand, the mean enhancement in pressure drop and friction factor was obtained up to 47% and 46% by using nanofluid with the same volumetric concentration of nanoparticles i.e. 0.2% respectively. The experimental results also revealed that the heat transfer rate, overall heat transfer coefficient and Nusselt number of nanofluids increases by increasing the volume flow rates and volumetric concentration of nanoparticles. However, these thermal performance parameters of nanofluids started to decline when the volumetric concentration of nanoparticles was increased from 0.2% to 0.3%. Furthermore, pressure drop and friction factor of nanofluids increase by increasing the volumetric concentration of nanoparticles, while pressure drop increases and friction factor decreases by increasing the volume flow rate of nanofluids respectively. At the end, the thermal efficiency of automobile radiator with high cooling rates was obtained by using nanofluid with 0.2% volumetric concentration of nanoparticles.

关键词： ZnO nanoparticles heat transfer enhancement thermal efficiency automobile radiator

Efficient two-dimensional atom localization in a five-level conductive chiral atomic medium via birefringence beam absorption spectrum

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2021年第1期73卷 25-34页

作者： sajid Ali Muhammad Idrees Bakth Amin Bacha Arif Ullah Muhammad Haneef Lab of Theoretical Physics Department of PhysicsHazara UniversityMansehra 21300Pakistan Quantum Optics and Quantum Information Research Group Department of PhysicsUniversity of MalakandChakdara Dir(L)Khyber PakhtunkhwaPakistan Zhejiang Province Key Laboratory of Quantum Technology and Device Department of PhysicsZhejiang UniversityHangzhou 310027China

We have theoretically investigated two-dimensional atom localization using the absorption spectra of birefringence beams of light in a single wavelength *** atom localization is controlled and modified through tunneling effect in a conductive chiral atomic medium with absorption spectra of birefringent *** significant localization peaks are investigated in the left and right circularly polarized *** and double localized peaks are observed in different quadrants with minimum uncertainty and significant *** localized probability is modified by controlling birefringence and tunneling *** results may be useful for the capability of optical microscopy and atom imaging.

关键词： 2D atom localization birefringence beam absorption chiral atomic medium

Computational Study of Ternary Devices: Stable, Low-Cost,and Efficient Planar Perovskite Solar Cells

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2018年第3期10卷 144-154页

作者： sajid sajid Ahmed Mourtada Elseman Jun Ji Shangyi Dou Dong Wei Hao Huang Peng Cui Wenkang Xi Lihua Chu Yingfeng Li Bing Jiang Meicheng Li State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of Renewable Energy North China Electric Power University Electronic and Magnetic Materials Department Advanced Materials Division Central Metallurgical Research and Development Institute (CMRDI)

Although perovskite solar cells with power conversion efficiencies(PCEs) more than 22% have been realized with expensive organic charge-transporting materials, their stability and high cost remain to be addressed. In this work, the perovskite configuration of MAPbX(MA = CH_3 NH_3,X = I_3, Br_3, or I_2Br) integrated with stable and low-cost Cu:Ni Oxhole-transporting material, ZnO electron-transporting material, and Al counter electrode was modeled as a planar PSC and studied theoretically. A solar cell simulation program(wx AMPS), which served as an update of the popular solar cell simulation tool(AMPS: Analysis of Microelectronic and Photonic Structures), was used. The study yielded a detailed understanding of the role of each component in the solar celland its effect on the photovoltaic parameters as a whole. The bandgap of active materials and operating temperature of the modeled solar cell were shown to influence the solar cell performance in a significant way. Further, the simulation results reveal a strong dependence of photovoltaic parameters on the thickness and defect density of the light-absorbing layers. Under moderate simulation conditions, the MAPb Br_3 and MAPbI _2 Br cells recorded the highest PCEs of 20.58 and 19.08%, respectively, while MAPbI_3 cell gave a value of 16.14%.

关键词： Perovskite solar cells Copper-doped nickel oxide Zinc oxide Simulation

Heat transfer analysis of MHD rotating flow of Fe_(3)O_(4)nanoparticles through a stretchable surface

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2021年第7期73卷 27-41页

作者： Faisal Shahzad Wasim Jamshed Tanveer sajid Kottakkaran Sooppy Nisar Mohamed R Eid Department of Mathematics Capital University of Science and Technology(CUST)Islamabad44000Pakistan Department of Mathematics College of Arts and SciencesPrince Sattam bin Abdulaziz UniversityWadi AldawaserSaudi Arabia Department of Mathematics Faculty of ScienceNew Valley UniversityAl-KhargaAl-Wadi Al-Gadid72511 Egypt Department of Mathematics Faculty of ScienceNorthern Border UniversityArar1321Saudi Arabia

The flow of a magnetite-H_(2)O nanofluid has been considered among two rotating surfaces,assuming porosity in the upper ***,the lower surface is considered to move with variable speed to induce the forced *** as well as Coriolis forces impacting on the rotating fluid are likewise taken into *** conversions are employed for the transformation of the governing partial-differential equations into a group of non-dimensional ordinary-differential *** solution of the converted expressions is gained by means of the shooting *** is theoretically found that the nanofluid has less skin friction and advanced heat transport rate when compared with the base *** effect of rotation causes the drag force to elevate and reduces the heat transport *** are portrayed to reveal the impact of injection/suction.

关键词： rotating frame magnetite-water nanofluid flow magnetic field stretching sheet

Estimating the Recreational Value of Kotri Barrage in Sindh,Pakistan

在线全文

学校读者我要写书评

暂无评论

Estimating the Recreational Value of Kotri Barrage in Sindh,...

作者： Siyal sajid Ali 南京农业大学

学位级别：硕士

本研究以巴基斯坦信德省巴基斯坦旅游景区为案例,于2018年6-7月实地调研,共收集300份问卷,以期通过经济分析增加巴基斯坦景区收入,进一步促进巴基斯坦景区发展。目前,学者已经对景区经济进行了较为充分的分析评估,但大多数倾向关注绿地... 详细信息

本研究以巴基斯坦信德省巴基斯坦旅游景区为案例,于2018年6-7月实地调研,共收集300份问卷,以期通过经济分析增加巴基斯坦景区收入,进一步促进巴基斯坦景区发展。目前,学者已经对景区经济进行了较为充分的分析评估,但大多数倾向关注绿地景区,如对国家历史公园的市场价值评估。同时可以发现,目前学者对信德省的湿地经济价值研究较少。因此,本研究创新性地对巴基斯坦景区进行经济价值评估,进一步丰富了巴基斯坦湿地经济价值的研究,为景区经济研究提供有益补充。本文运用旅行成本模型来衡量巴基斯坦景区的娱乐价值。研究结果表明,巴基斯坦景区的娱乐价值为平均每位游客4029卢比,年度娱乐总价值为846.09百万卢比。当前的消费者剩余为每位游客70卢比,年度总消费者剩余为1470万卢比。同时发现,有多种因素会影响巴基斯坦的年度游客量,例如旅行成本、游客家庭收入以及巴基斯坦景区的质量。巴基斯坦景区质量的提高可能会增加25%的景区收入。因此,本研究建议巴基斯坦景区将门票提高60卢比/每人,用于对巴基斯坦景区的管理,以此方式每年将会产生14亿美元的收入,相当于巴基斯坦环境部门年度分配预算的22%。此外,该研究测算了近90%的游客同意支付额外的入场费,用以改善哥德里拦河坝。75%的游客愿意以60卢比作为进入的费用。因此,如果对60卢比的入场费进行一定改进,则拦河坝的年收入将增加1260万卢比。这笔款项将对信德省政府、野生动植物保护、拦河坝的维护以及拉姆萨尔遗址的保护均有帮助。此外,当询问访问者现场条件是否有所改善时,超过四分之三(225)的受访者表示访问频率会更高。在这种情况下,每位访客的年均旅行次数将从3.5增加到5.5。如果在经济价值的计算中加以利用,则其年度经济价值将呈现更多的增长。

关键词：环境价值旅游成本法总旅游价值科特里拦河坝巴基斯坦

An Analysis of Peristaltic Flow of a Micropolar Fluid in a Curved Channel

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2011年第1期28卷 138-141页

作者： N. Ali M. sajid T. ,laved Z. Abbas Department of Mathematics International Islamic University Islamabad Paksitan Theoretical Plasma Physics Division PINSTECH P.O. Nilore Islamabad Pakistan

We analyze the two-dimensional peristaltic flow of a micropolar fluid in a curved channel. Long wavelength and low Reynolds number assumptions are used in deriving the governing equations. A shooting method with fourth-order Runge-Kutta algorithm is employed to solve the equations. The influence of dimensionless curvature radius on pumping and trapping phenomena is discussed with the help of graphical results. It is seen that the pressure rise per wavelength in the pumping region increases with an increase in the curvature of the channel. Moreover the symmetry of the trapped bolus destroys in going from strMg＇ht to curved channel.

关键词： Fluid dynamics

Stretching a Curved Surface in a Viscous Fluid

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

Chinese Physics Letters 2010年第2期27卷 149-152页

作者： M. sajid N. Ali T. Javed Z. Abbas Theoretical Plasma Physics Division PINSTECH P.O. Nilore Islamabad 44000 Pakistan Faculty of Basic and Applied Sciences International Islamic University Islamabad 44000 Pakistan

This work is concerned with the viscous flow due to a curved stretching sheet. The similarity solution of the problem is obtained numerically by a shooting method using the Runge-Kutta algorithm. The physical quantities of interest like the fluid velocity and skin friction coefficient are obtained and discussed under the influence of dimensionless curvature. It is evident from the results that dimensionless curvature causes an increase in boundary layer thickness and a decrease in the skin friction coefficient.

关键词： Fluid dynamics Mathematical physics