检索结果-南通市图书馆

Low-complexity signal detection for massive MIMO systems via trace iterative method

Journal of Systems Engineering and Electronics 2024年第3期35卷 549-557页

作者： IMRAN A.Khoso ZHANG Xiaofei ABDUL Hayee Shaikh IHSAN A.Khoso zaheer ahmed dayo College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China School of Electrical Engineering Korea UniversitySeoul 02841Korea School of Mathematics South China University of TechnologyGuangzhou 510641China Department of Computer Science Huanggang Normal UniversityHuanggang 438000China

Linear minimum mean square error(MMSE)detection has been shown to achieve near-optimal performance for massive multiple-input multiple-output(MIMO)systems but inevitably involves complicated matrix inversion,which entails high *** avoid the exact matrix inversion,a considerable number of implicit and explicit approximate matrix inversion based detection methods is *** combining the advantages of both the explicit and the implicit matrix inversion,this paper introduces a new low-complexity signal detection ***,the relationship between implicit and explicit techniques is ***,an enhanced Newton iteration method is introduced to realize an approximate MMSE detection for massive MIMO uplink *** proposed improved Newton iteration significantly reduces the complexity of conventional Newton ***,its complexity is still high for higher ***,it is applied only for first two *** subsequent iterations,we propose a novel trace iterative method(TIM)based low-complexity algorithm,which has significantly lower complexity than higher Newton *** guarantees of the proposed detector are also *** simulations verify that the proposed detector exhibits significant performance enhancement over recently reported iterative detectors and achieves close-to-MMSE performance while retaining the low-complexity advantage for systems with hundreds of antennas.

关键词： signal detection low-complexity linear minimum mean square error(MMSE) massive multiple-input multiple-output(MIMO) trace iterative method(TIM)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Progressive Approach to Generic Object Detection: A Two-Stage Framework for Image Recognition

引用

Computers, Materials & Continua 2023年第6期75卷 6351-6373页

作者： Muhammad Aamir Ziaur Rahman Waheed ahmed Abro Uzair Aslam Bhatti zaheer ahmed dayo Muhammad Ishfaq College of Computer Science Huanggang Normal UniversityHuanggangHubei438000China FAST School of Computing National University of Computer&Emerging Science(NUCES)Karachi CampusKarachi75030Pakistan School of Information and Communication Engineering Hainan UniversityHaikou68000China

Object detection in images has been identified as a critical area of research in computer vision image *** has developed several novel methods for determining an object’s location and category from an ***,there is still room for improvement in terms of detection *** study aims to develop a technique for detecting objects in *** enhance overall detection performance,we considered object detection a two-fold problem,including localization and *** proposed method generates class-independent,high-quality,and precise proposals using an agglomerative clustering *** then combine these proposals with the relevant input image to train our network on convolutional ***,a network refinement module decreases the quantity of generated proposals to produce fewer high-quality candidate ***,revised candidate proposals are sent into the network’s detection process to determine the object *** algorithm’s performance is evaluated using publicly available the PASCAL Visual Object Classes Challenge 2007(VOC2007),VOC2012,and Microsoft Common Objects in Context(MS-COCO)*** only 100 proposals per image at intersection over union((IoU)=0.5 and 0.7),the proposed method attains Detection Recall(DR)rates of(93.17%and 79.35%)and(69.4%and 58.35%),and Mean Average Best Overlap(MABO)values of(79.25%and 62.65%),for the VOC2007 and MS-COCO datasets,***,it achieves a Mean Average Precision(mAP)of(84.7%and 81.5%)on both VOC *** experiment findings reveal that our method exceeds previous approaches in terms of overall detection performance,proving its effectiveness.

关键词： Deep neural network deep learning features agglomerative clustering localizations refinement region of interest(ROI) object detection

来源：

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

A Dual-Tree Complex Wavelet Transform-Based Model for Low-Illumination Image Enhancement

引用

Wuhan University Journal of Natural Sciences 2021年第5期26卷 405-414页

作者： GUAN Yurong Muhammad Aamir Ziaur Rahman zaheer ahmed dayo Waheed ahmed Abro Muhammad Ishfaq HU Zhihua Department of Computer Science Huanggang Normal UniversityHuanggang 438000HubeiChina

Image enhancement is a monumental task in the field of computer vision and image *** methods are insufficient for preserving naturalness and minimizing noise in *** article discusses a technique that is based on wavelets for optimizing images taken in ***,the V channel is created by mapping an image’s RGB channel to the HSV color ***,the acquired V channel is decomposed using the dual-tree complex wavelet transform(DT-CWT)in order to recover the concentrated information within its high and low-frequency ***,an adaptive illumination boost technique is used to enhance the visibility of a low-frequency ***,anisotropic diffusion is used to mitigate the high-frequency component’s noise *** improve the results,the image is reconstructed using an inverse DT-CWT and then converted to RGB space using the newly calculated ***,images are white-balanced to remove color *** demonstrate that the proposed approach significantly improves outcomes and outperforms previously reported methods in general.

关键词： image enhancement dual-tree complex wavelet transform(DT-CWT) anisotropic diffusion low-light images

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Estimates and burden of foodborne pathogens in RTE beverages in relation to vending practices

引用

Food Quality and Safety 2019年第2期3卷 107-115页

作者： Asma Afreen zaheer ahmed Hajra Ahmad Nauman Khalid Department of Home and Health Sciences Research ComplexAllama Iqbal Open UniversityIslamabadPakistan School of Food and Agricultural Sciences University of Management and TechnologyLahorePakistan

Objectives:Growing trend of street-vended food in underdeveloped countries offers low-cost food to many sections of *** it provides job opportunities to many urban dwellers,several health hazards are associated with this *** present study investigates the burden of foodborne pathogens in Ready-To-Eat(RTE)beverages in relation to vending practices among street vendors of Rawalpindi City,Pakistan according to standardized methods and *** and Methods:Six densely populated locations of Rawalpindi city were *** consumed sugar cane juice(SCJ)and tamarind prune(dried plums)drink(TPD)(locally called as Imli Alu Bukhara sherbet)from five vendors from each location were chosen in summer season where the temperature reaches above 40℃.Mean and the standard deviation were obtained by univariate and bivariate *** between the study variables was assessed through cross-tabulations,chi-square,and correlation ***:All the samples were found unsatisfactory in comparison to guidelines of aerobic plate *** coliform was observed in 86.7 per cent of SCJ and 70.0 per cent of TPD *** samples of SCJ exceeded the limit of>1100 MPN/ml value,whereas samples of TPD exceeded this limit for Escherichia *** of SCJ and 93.3 per cent of TPD samples depicted the presence of Salmonella *** *** found significantly high in 73.3 per cent samples of SCJ and 23.3 per cent samples of ***:The incidence of high bioloads attributes towards a potential reservoir of foodborne pathogens due to unhygienic vending practices.

关键词： Ready-To-Eat beverages foodborne pathogens street vendors vending practices

来源：

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

Thermal optimization of MHD nanofluid over a wedge by using response surface methodology:Sensitivity analysis

引用

Propulsion and Power Research 2023年第4期12卷 556-567页

作者： ahmed Zeeshan Dilawar Hussain zaheer Asghar Muhammad Mubashir Bhatti Faisal Z.Duraihem Department of Mathematics&Statistics FBASInternational Islamic UniversityIslamabadH-10Islamabad 44000Pakistan Department of Mathematics Faculty of Natural and Health SciencesUniversity of BaltistanSkardu 16100Pakistan Centre for Mathematical Sciences Pakistan Institute of Engineering and Applied SciencesNiloreIslamabad 45650Pakistan Department of Physics and Applied Mathematics Pakistan Institute of Engineering and Applied SciencesNiloreIslamabad 45650Pakistan Department of Mathematics and System Sciences Shandong University of Science and TechnologyShandongChina Department of Mathematics College of ScienceKing Saud UniversityP.O.Box 2455Riyadh 11451Saudi Arabia

It is well documented that heat transfer is enhanced with addition of nanosized particles in ***,in a mechanical system there are variety of factors influences the heat *** factors are significant while others are *** this paper,authors will discuss sensitivity of different input parameters such as Le,Nt and Nb on output responses𝑁Nu_(x)and Sh_(x).To achieve this goal,the problem is modeled using basic conservation *** formulated model is a set of PDEs,which are converted to set of non-linear ODEs by using similarity *** these ODEs are solved numerically by using MATLAB built in package bvp4c and compared the numerical results with existing work and found good *** analysis is performed by employing RSM to determine the relationship between the input parameters such that 0.1≤Le≤1,0.1≤Nt≤1 and 0.1≤Nb≤1 and the output responses(Nu_(x)and Sh_(x)).ANOVA tables are generated by using *** using the ANOVA tables the correlations between input parameters and output response are *** check the validity of correlated equations,the residuals are plotted graphically and show best correlations between input parameters and output *** high values of R^(2)=98.65 and AdjR^(2)=97.43 for Nu_(x)and R^(2)=97.83 and AdjR^(2)=95.88 for Sh_(x)demonstrates the high validity of ANOVA results to perform sensitivity ***,we have conducted a sensitivity analysis of the responses and came to the important results that Nt and Nb is most sensitive to Nusselt number and Sherwood number respectively.

关键词： Sensitivity analysis Nusselt number Sherwood number Response surface methodology(RSM) Analysis of variance(ANOVA) Nano fluid

来源：

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

蚕豆蛋白的提取及NaCl浓度和pH值对其溶解性和乳化性的影响(英文)

引用

农业工程学报 2010年第1期26卷 380-384页

作者：王艳萍李双喜 zaheer ahmed 宋庆明天津科技大学食品工程与生物技术学院食品营养与安全教育部重点实验室天津300457

蚕豆蛋白富含微量元素和人体必需的8种氨基酸,具有较高的开发价值。采用超声提取和水提取的方法提取蚕豆蛋白,研究了NaCl浓度和pH对蚕豆蛋白提取率、沉淀、功能性的影响。在pH值为8～12,超声提取和水提取均有较高的提取率。蚕豆蛋白的... 详细信息

蚕豆蛋白富含微量元素和人体必需的8种氨基酸,具有较高的开发价值。采用超声提取和水提取的方法提取蚕豆蛋白,研究了NaCl浓度和pH对蚕豆蛋白提取率、沉淀、功能性的影响。在pH值为8～12,超声提取和水提取均有较高的提取率。蚕豆蛋白的等电点在pH4.0～4.2之间。在pH4溶解性和乳化性最低,pH值在4～12时溶解性和乳化性随pH值的升高而升高,pH值为12时溶解性和乳化性最高。NaCl浓度从0到1.0mol/L,溶解性和乳化性升高;当NaCl浓度继续增加,在pH4、pH7溶解性和乳化性随之下降。在相同的NaCl浓度和pH值时,超声提取比水提取蛋白的溶解性和乳化性高。该研究为蚕豆蛋白的提取工艺的确定及其在食品中的应用提供依据。

关键词：蛋白提取溶解性乳化蚕豆

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Why more research needs to be done on echinococcosis in Pakistan

引用

Infectious Diseases of Poverty 2017年第1期6卷 786-790页

作者： Haroon ahmed Shahzad Ali Muhammad Sohail Afzal Abid Ali Khan Hamid Raza zaheer Hussain Shah Sami Simsek Department of Biosciences COMSATS Institute of Information Technology(CIIT)Park RoadChak ShahzadIslamabadPakistan Department of Parasitology Faculty of Veterinary MedicineUniversity of Firat23119ElazigTurkey Department of Wildlife and Ecology University of Veterinary and Animal SciencesLahorePakistan Department of Chemistry School of ScienceUniversity of Management and Technology(UMT)LahorePakistan School of Science University of Management and Technology(UMT)LahorePakistan

Background:Echinococcosis has a worldwide geographical distribution with endemic foci on every inhabited *** to the frequent outbreaks in different parts of Pakistan in the recent past,echinococcosis is being described as a neglected tropical disease and is considered one of the most neglected parasitic diseases in the *** endemic regions,predominantly settings with limited resources,there are high numbers of echinococcosis patients,as these communities do not have access to appropriate *** Pakistan,there are limited reports on *** disease is prevalent in human and livestock,but this has not been sufficiently explored *** is an agricultural country and due to the disease’s zoonotic mode of transmission,there is a dire need of future research on *** present paper is an effort to highlight the importance of echinococcosis in ***:There is a dire need for future research on echinococcosis in Pakistan as very few investigations had been carried out on this topic thus *** prevalence of the disease in neighbouring countries highlights that Pakistan might be at severe risk of this zoonotic infection and further supports the need for more *** Pakistan,the majority of the population lives in rural areas with limited acess to proper hygienic/sanitary *** conditions favour the outbreak of diseases such as *** limited available data could result in higher outbreaks in the future,and thus cause the already weak healthcare system to *** country has a meagre annual budget for health,which is being spent on known infections such as polio,dengue fever and hepatic viral infections.A proper surveillance system for echinococcosis is required across the country as treatment is usually expensive,complicated and may require extensive surgery and/or prolonged drug *** of new/novel drugs and other treatment modalities receives very little,if any,***

关键词： Pakistan Echinococcosis Neglected tropical diseases Research

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Evaluation of cotton germplasm for morphological and biochemical host plant UPdates resistance traits against sucking insect pests complex

引用

Journal of Cotton Research 2021年第3期4卷 211-218页

作者： RIZWAN Muhammad ABRO Saifullah ASIF Muhammad Usman HAMEED Amjad MAH BOOB Wajid DEHO zaheer ahmed SIAL Mahboob Ali Nuclear Institute of Agriculture(NIA) TandojamSindh 70060Pakistan Nuclear Institute for Agriculture and Biology(NIAB) Faisalabad 38000Pakistan College of Plant Science and Technology Huazhong Agricultural UniversityWuhan 430070China

Background:Sucking insect pests cause severe damage to cotton crop *** development of insect resistant cotton cultivars is one of the most effective measures in curtailing the yield *** the role of morphological and biochemical host plant resista nee(HPR)traits in plant defense,12 cotton genotypes/varieties were evaluated for leaf area,leaf glanding,total soluble sugars,total soluble proteins,total phenolics,tannin and total flavonoids against fluctuating populations of whitefly,thrips and jassid under field ***:The population of these insects fluctuated during the growing seas on and remained above threshold level(whitefly>5,thrips>(8-10)f or jassid>1 per leaf)during late June and early *** and negative association of whitefly(r=-0.825)and jassid(r=-0.929)with seed cotton yield was *** population of insects were the highest in Glandless-1 followed by NIA-82 and ***-Kiran followed by NI AB-878 and Sadori were the most resistant,with the mean population of 1.41,1.60,1.66(whitefly);2.24,232,2.53(thrips)and 037,0.31,036(jassid),*** resistant variety NIAB-Kiran showed less soluble sugars(8.54 mg.g^(-1)),soluble proteins(27.11 mg.g^(-1))and more phenolic(36.56 mg.g^(-1))and flavonoids(13.10mg.g^(-1))as compared with the susceptible check ***,all insect populations were positively correlated with total soluble sugars and *** populations exhibited negative response to leaf gossypol glands,total phenolics,tannins and *** thrips and jassid populations had a significant and negative correlation with these four biochemical HPR ***:The ide ntified resistant resources and HPR traits can be deployed against sucking in sect pests'complex in future breeding programs of developing insect resistant cotton varieties.

关键词： Gossypium Insect resistance Plant defense Plant breeding Resistant traits Sucking in sects

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

一株马乳酒样乳杆菌胞外多糖的理化性质

引用

食品与发酵工业 2011年第9期37卷 59-63页

作者：王艳萍李超 zaheer ahmed 天津科技大学食品工程与生物技术学院

ZW3胞外多糖是由分离自西藏开菲尔粒中的马乳酒样乳杆菌马乳酒亚种ZW3分泌产生,文中针对此多糖进行了理化特性的分析与表征。实验中,傅立叶变换红外光谱表明此多糖存在羧基、羟基和酰胺基,与典型的异型多糖结构相一致。气相色谱分析表... 详细信息

ZW3胞外多糖是由分离自西藏开菲尔粒中的马乳酒样乳杆菌马乳酒亚种ZW3分泌产生,文中针对此多糖进行了理化特性的分析与表征。实验中,傅立叶变换红外光谱表明此多糖存在羧基、羟基和酰胺基,与典型的异型多糖结构相一致。气相色谱分析表明此多糖仅由半乳糖和葡萄糖构成。ZW3胞外多糖絮凝能力与黄原胶相似,比瓜尔胶的絮凝能力要强。相对于商业用途亲水胶体黄原胶、瓜尔胶和刺槐胶来说,ZW3胞外多糖具有更强的乳化能力,因此它具有作为商业用乳化剂的潜力。以上特性表明ZW3胞外多糖在工业应用方面特别是食品工业上拥有广阔的前景。

关键词：马乳酒样乳杆菌ZW3 胞外多糖理化特性

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

产胞外多糖乳球菌的优化培养

引用

中国乳品工业 2008年第7期36卷 25-28页

作者：王艳萍冯武 zaheer ahmed 天津科技大学食品工程与生物技术学院天津300457

以苯酚硫酸法测定乳酸乳球菌乳酸亚种WH-C1在不同培养基中的胞外多糖合成量,试验以WHEY作为基础培养基,比较了添加不同碳源、氮源对EPS合成的影响,并采用正交实验L9(34)对碳源、氮源的添加量及培养基初始pH进行了优化,确定最佳组合为:... 详细信息

以苯酚硫酸法测定乳酸乳球菌乳酸亚种WH-C1在不同培养基中的胞外多糖合成量,试验以WHEY作为基础培养基,比较了添加不同碳源、氮源对EPS合成的影响,并采用正交实验L9(34)对碳源、氮源的添加量及培养基初始pH进行了优化,确定最佳组合为:葡萄糖添加量15 g/L,胰蛋白胨添加量5 g/L,培养基初始pH值为6.5。研究了不同培养温度和接种量条件下该菌株的EPS合成曲线,结果表明温度对发酵液中EPS总积累量的影响较大,通过本研究确定了乳酸乳球菌乳酸亚种WH-C1最佳培养条件为:培养温度25℃,接种量为2%(体积分数),培养时间32 h,EPS合成量为325.8 mg/L。

关键词：胞外多糖优化培养基培养条件

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：