检索结果-南通市图书馆

Chinese Journal of Aeronautics 2021年第1期34卷 50-67页

作者： khurram shahzad SANA Weiduo HU School of Astronautics Beihang UniversityBeijing 102206China

This paper proposes a novel hybrid algorithm called Fractional-order Particle Swarm optimization Gravitational Search Algorithm(FPSOGSA)and applies it to the trajectory planning of the hypersonic lifting reentry flight *** proposed method is used to calculate the control profiles to achieve the two objectives,namely a smoother trajectory and enforcement of the path constraints with terminal *** smoothness of the trajectory is achieved by scheduling the bank angle with the aid of a modified scheme known as a Quasi-Equilibrium Glide(QEG)*** aerodynamic load factor and the dynamic pressure path constraints are enforced by further planning of the bank angle with the help of a constraint enforcement *** maximum heating rate path constraint is enforced through the angle of attack *** Common Aero Vehicle(CAV)flight vehicle is used for the simulation purpose to test and compare the proposed method with that of the standard Particle Swarm Optimization(PSO)method and the standard Gravitational Search Algorithm(GSA).The simulation results confirm the efficiency of the proposed FPSOGSA method over the standard PSO and the GSA methods by showing its better convergence and computation efficiency.

关键词： Fractional-order Gravitational search algorithm Particle swarm optimization Reentry gliding vehicle Trajectory optimization

Stem taper functions for Betula platyphylla in the Daxing’an Mountains,northeast China

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2021年第2期32卷 529-541页

作者： Muhammad khurram shahzad Amna Hussain Harold EBurkhart Fengri Li Lichun Jiang Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education School of ForestryNortheast Forestry UniversityHarbin 150040People’s Republic of China Department of Forest Resources and Environmental Conservation(MC 0324) Virginia Tech310 West Campus DriveBlacksburgVA 24061USA

Accurate prediction of stem diameter is an important prerequisite of forest *** this study,an appropriate stem taper function was developed for upper stem diameter estimation of white birch(Betula platyphylla Sukaczev)in ten sub-regions of the Daxing’an Mountains,northeast *** commonly used taper functions were assessed using a diameter and height dataset comprising 1344 trees.A first-order continuous-time error structure accounted for the inherent *** segmented model of Max and Burkhart(For Sci 22:283–289,***://***/10.1093/fores tscie nce/22.3.283)and the variable exponent taper function of Kozak(For Chron 80:507–515,***://***/10.5558/tfc80507-4)described the data *** to its lower multicollinearity,the Max and Burkhart(1976)model is recommended for diameter estimation at specific heights along the stem for the ten *** comparison,the Max and Burkhart(1976)model was refitted using nonlinear mixed-effects ***-effects models would be used only when additional upper stem diameter measurements are available for *** in region-specific taper functions were indicated by the method of the non-linear extra sum of ***,the particular taper function should be adjusted accordingly for each sub-region in the Daxing’an Mountains.

关键词： White birch Taper function Multicollinearity Autocorrelation Nonlinear regression

Proximate composition and elemental analysis in soft tissues of freshwater mussels （Anodonta anatina） from the Chashma Lake, River Indus Pakistan

在线全文

学校读者我要写书评

暂无评论

Frontiers in Biology 2016年第4期11卷 331-337页

作者： Muhammad Sohail Muhammad Naeem Khan Abdul Shakoor Chaudhry khurram shahzad Department of Zoology University of the Punjab Lahore Pakistan School of Agriculture_Food and Rural development Newcastle University UK

BACKGROUND： Aquatic invertebrates are playing an important role in assessment of the water contaminants and also serve as a major component of food chain. Freshwater mussels are considered to be the good bioindicator species of aquatic environment and widely used to determine the metals load. METHODS： Proximate composition and elemental analysis were carried out in edible （foot, mantle） and non-edible portion （gills） of freshwater mussels （Anodonta anatina） harvested from various site of Chashma Lake, River Indus Pakistan. RESULTS： The nutritional components were varied among the studied portion and muscular foot found to be the best part for consumption. Protein and fat contents were significantly higher in foot （15.90±0.88%, 1.19 ±0.26%） as compared to mantle （10.78±2.24%, 0.27±0.09%） and gills （6.44± 1.22%, 0.53 4-0.15%） respectively. For the macro minerals mantle had high concentration of Ca （46838±984 mg/kg）, Na （2706±343 mg/kg）, P （6921± 1063 mg/kg） and Mn （7207± 1046 mg/kg） as compared to foot. CONCLUSIONS： Heavy metals （Cd, Cu, Cr） concentration in edible portions were lower than the permissible limit by WHO whereas the concentration of Pb was slightly higher than the recommended value that might be the risk for the consumers. Being filter feeder gills accumulated the high concentration of all the metals and found to be the key portion for biomonitoring studies. Freshwater mussels of Chashma Lake Indus River are the rich source of protein and all the other micro and macro minerals therefore could be used as an excellent source of food.

关键词： proximate composition minerals metals River Indus freshwater mussel

Atypical presentation of shoulder brucellosis misdiagnosed as subacromial bursitis:A case report

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2021年第4期9卷 927-934页

作者： Fu-Sheng Wang khurram shahzad Wei-Guo Zhang Jie Li Kang Tian Department of Bone and Joint First Hospital of Dalian Medical UniversityDalian 116000Liaoning ProvinceChina

BACKGROUND Brucella infections in the shoulder joint are uncommon,and few have been reported in the *** SUMMARY A 26-year-old male was admitted to our hospital with complaint of recurrent pain and limited movement of the right *** patient reported the pain to have first occurred as an isolated event 6 mo previously and to have reoccurred 5 mo later,when it was accompanied by limited movement of the *** from physical examination and magnetic resonance imaging(referred to as MRI)suggested the diagnosis of subacromial bursitis,and diagnostic paracentesis and arthroscopic debridement were ***,synovial fluid culture detected brucella,and the finding was confirmed by mass spectrometry of a colony *** diagnosis was corrected to brucellosis of the shoulder joint,and antibiotic drug treatment(oral rifampicin and doxycycline)was administrated for 6 *** 4-mo postoperative follow-up examination(MRI)yielded normal *** 2-year follow-up showed no signs of *** This rare case of brucellosis infection in shoulder highlights the importance of increasing awareness to help avoid misdiagnosis.

关键词： Shoulder Misdiagnosis Brucellosis Subacromial bursitis Brucella Case report

Electrophoretically deposited binder-free 3-D carbon/sulfur nanocomposite cathode for high-performance Li–S batteries

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 Energy Chemistry 2020年第9期29卷 92-101,I0003页

作者： Sasan Ghashghaie Samson Ho-Sum Cheng Jie Fang Hafiz khurram shahzad Robin Lok-Wang Ma Chi-Yuen Chung Department of Materials Science and Engineering City University of Hong KongHong KongChina Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and TechnologyHong KongChina

In the present study,the electrophoretic deposition method was successfully applied as a binder-free and scalable approach to deposit carbonaceous nanomaterials on carbon fiber paper(CFP)for cathode applications in Li-S *** microstructural studies of the EPD-CNT film using scanning electron microscopy(SEM)revealed the formation of a crack-free and porous layer of CNTs being uniformly distributed on the CFP *** EPD:CFP/CNT/S cathode delivered a capacity around 2.2 times higher than that obtained in the absence of the EPD-CNT film(CFP/S cell)after 50 cycles and a capacity of935 mAh g^-1 after 100 cycles at 0.1 *** EPD method was then employed to fabricate layer-by-layer structures where the EPD-CNT film was decorated with carbon black *** initial capacity as well as the reversible capacity after 100 cycles was further increased by the EPD:CFP/CNT/KB/S layer-by-layer structure to 1473 and 1033 mAh g^-1,respectively,indicating effective suppression of the shuttle *** addition,the rate performance of CFP/S was improved by depositing the EPD-CNT and EPD-CNT/carbon black architectures on CFP surface,and even further enhanced through the co-deposition of CNT and Pt nanoparticles by EPD,delivering a specific capacity of around 730 mAh g^-1 at 1 ***,the cathodes fabricated by EPD were observed to outperform those made by the conventional casting method in terms of cycling performance,internal resistance,and *** difference was ascribed to the non-uniform microstructure of the Cast-CNT film,which resulted in poor interfacial connection between the CNT agglomerates,hindering uniform sulfide/sulfur deposition during *** obtained results suggested that the binder-free C/S nanocomposite cathode made by EPD is key to further enhance the specific capacity and energy density of Li-S batteries.

关键词： Electrophoretic deposition Lithium-sulfur batteries Carbon nanotubes C/S nanocomposite

在线全文

学校读者我要写书评

暂无评论

基于三线DFT的航空电源频率实时检测算法

电工技术学报 2012年第10期27卷 190-195,214页

作者：肖鲲王莉娜 M.khurram shahzad 北京航空航天大学自动化科学与电气工程学院北京100191

针对航空变频电源的频率(360～800Hz)检测,提出了一种基于三线离散傅里叶变换(DFT)的实时检测算法。首先对采样序列加汉宁窗,通过DFT计算基波频率主瓣区域的离散谱线幅值,推导出基波频率与3条离散谱线幅值的数值关系。其次结合电力系统... 详细信息

针对航空变频电源的频率(360～800Hz)检测,提出了一种基于三线离散傅里叶变换(DFT)的实时检测算法。首先对采样序列加汉宁窗,通过DFT计算基波频率主瓣区域的离散谱线幅值,推导出基波频率与3条离散谱线幅值的数值关系。其次结合电力系统的基波和谐波特点,分析了该算法无主瓣频谱泄露的采样点数选择方法;采用旋转坐标法计算离散谱线幅值,使三线DFT计算量得以显著减小;通过迭代法估计频率初值,对航空电源宽范围连续变化值进行检测,克服栅栏效应。仿真和实验结果表明,该算法具有良好的实时性,阶跃响应好,稳态精度高。

关键词：频率检测离散傅里叶变换汉宁窗频谱分析

Design and Research of Information Hiding Algorithm Based on Multi-wavelet Transform and Color Space

在线全文

学校读者我要写书评

暂无评论

Design and Research of Information Hiding Algorithm Based on...

作者：尚合（shahzad khurram）长安大学

学位级别：硕士

With the explosive growth of network information,information security issues have *** hiding uses multimedia data as a carrier,using humans’ low sensitivity to carrier redundant information,and designing algorithms to hide information in the carrier to achieve the purpose of covert *** hiding is an important branch of research in the field of information security and an important means to realize secret *** article is based on the research of information hiding,using digital image as the carrier of information hiding,mainly researching information hiding area rules,secret information preprocessing rules,and information embedding *** designing and researching information steganography algorithms based on energy weights,a method is *** information hiding algorithm based on CL multiwavelet and lαβ color migration realizes highperformance secret information hiding and secret ***,perform the first-order CL multiwavelet transform on the carrier image;secondly,according to the characteristics of the high and low energy distributions after the CL multiwavelet transform,perform lαβ color space conversion in the high-energy LL

关键词：

On Computing the Suitability of Non-Human Resources for Business Process Analysis

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

Computers, Materials & Continua 2021年第4期67卷 303-319页

作者： Abid Sohail khurram shahzad P.D.D.Dominic Muhammad Arif Butt Muhammad Arif Muhammad Imran Tariq Department of Computer Science COMSATS University IslamabadLahorePakistan Punjab University College of Information Technology University of the PunjabLahorePakistan Universiti Teknologi PETRONAS Bandar Seri IskandarTronoh PerakMalaysia School of Computer Science Guangzhou UniversityGuangzhou510006China Department of Computer Science and Information Technology Superior UniversityLahorePakistan

Business process improvement is a systematic approach used by several organizations to continuously improve their quality of *** to that is analyzing the current performance of each task of the process and assigning the most appropriate resources to each *** continuation of our previous work,we categorize resources into human and non-human *** instance,in the healthcare domain,human resources include doctors,nurses,and other associated staff responsible for the execution of healthcare activities;whereas the non-human resources include surgical and other equipment needed for *** this study,we contend that the two types of resources(human and non-human)have a different impact on the process performance,so their suitability should be measured ***,no work has been done to evaluate the suitability of non-human resources for the tasks of a ***,it becomes difficult to identify and subsequently overcome the inefficiencies caused by the non-human resources to the *** address this problem,we present a three-step method to compute a suitability score of non-human resources for the *** an evaluation of the proposed method,a healthcare case study is used to illustrate the applicability of the proposed ***,we performed a controlled experiment to evaluate the usability of the proposed *** encouraging response shows the usefulness of the proposed method.

关键词： Business process management business process improvement process warehouse data warehouse resource suitability component resource suitability health care artificial intelligence

Impact of Organizational Culture on Employees’ Performance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Impact of Organizational Culture on Employees’ Performance

作者： khurram shahzad 山东大学

学位级别：硕士

文化差和效率低下的组织文化整合在一个影响公司业绩和降低股东回报的业务组中。这项研究的主要目标是检查一种有效的文化是否影响员工的表现。我们收到了 75名非政府组织员工的样本来填写问卷,访谈由随机选择的员工进行。经过分析,发... 详细信息

文化差和效率低下的组织文化整合在一个影响公司业绩和降低股东回报的业务组中。这项研究的主要目标是检查一种有效的文化是否影响员工的表现。我们收到了 75名非政府组织员工的样本来填写问卷,访谈由随机选择的员工进行。经过分析,发现文化对组织员工绩效有重要影响。它还描述了文化的其他方面。从这项研究中,我们可以说,如果员工是忠诚的,并且具有与行政管理要求相同的规范和率,那么可以提高绩效,因为他们可以实现整体组织目标。建议领导和管理者发展强大的组织文化,以提高员工和组织的整体表现。

关键词：现代企业绩效管理组织文化资源整合

Survey on <i>Essential and Accidental Real-Time Issues</i>in Software Engineering

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

Journal of Software Engineering and Applications 2017年第3期10卷 245-256页

作者： Furrakh shahzad Dr. Maruf Pasha Dr. Urooj Pasha Bushra Majeed khurram shahzad Department of Computer Science Pakistan Institute of Engineering and Technology Multan Pakistan Department of Information Technology Bahauddin Zakariya University Multan Pakistan Institute of Management Sciences Bahauddin Zakariya University Multan Pakistan

Software product lines have recently been presented as one of the best promis-ing improvements for the efficient software development. Different research works contribute supportive parameters and negotiations regarding the prob-lems of producing a perfect software scheme. Traditional approaches or recy-cling software are not effective to solve the problems concerning software competence. Since fast developments with software engineering in the past few years, studies show that some approaches are getting extensive attention in both industries and universities. This method is categorized as the software product line improvement;that supports reusing of software in big organizations. Different industries are adopting product lines to enhance efficiency and reduce operational expenses by way of emerging product developments. This research paper is formed to offer in-depth study regarding the software engineering issues such as complexity, conformity, changeability, invisibility, time constraints, budget constraints, and security. We have conducted various research surveys by visiting different professional software development organizations and took feedback from the professional software engineers to analyze the real-time problems that they are facing during the development process of software systems. Survey results proved that complexity is a most occurring issue that most software developers face while developing software applications. Moreover, invisibility is the problem that rarely happens according to the survey.

关键词： Software Engineering Issues Real-Time Software Development Problems Unexpected Issues of S.E