检索结果-南通市图书馆

Physical and mechanical properties of hydroponic lettuce for automatic harvesting

Information Processing in Agriculture 2021年第4期8卷 550-559页

作者： Wenqi Wang Yidong Ma Longsheng Fu Yongjie Cui Yaqoob majeed College of Mechanical and Electronic Engineering Northwest A&F UniversityYanglingShaanxi 712100China Key Laboratory of Agricultural Internet of Things Ministry of Agriculture and Rural AffairsYangling 712100China Shaanxi Key Laboratory of Agricultural Information Perception and Intelligent Service Yangling 712100China College of Agricultural Equipment Engineering Henan University of Science and TechnologyLuoyang 471003China Centre for Precision and Automated Agricultural Systems Washington State UniversityProsserWA 99350USA

To design an automatic harvesting machine for hydroponic lettuce(Lactuca sativa L.),physical and mechanical properties of hydroponic lettuce were investigated and *** content of stem,root and leaf,geometric characteristics,pulling force,and root cutting force were studied for harvesting hydroponic *** pulling force was examined by a tensile experiment,while the root cutting force was investigated by a shear experiment on the electronic universal testing *** moisture content of hydroponic lettuce was obtained by direct *** data were processed using regression analysis and mathematical statistics method.A regression equation and the law of numerical distribution were *** results showed that the geometric size of different hydroponic lettuce had little difference,and the distribution of physical parameters was *** content was found statistically similar in stem and root(around 91%),while the highest moisture content was found in the leaf of 95.73%.The root cutting force decrease with the increase of cutting speed and decrease with the cutting position move *** minimum average root cutting force in the experiment was 1.41 *** average pulling force was 13 *** study provides adequate theoretical support for the design of the automatic harvesting machine of hydroponic lettuce.

关键词： Greenhouse vegetable Harvester Variance analysis Response surface

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

Vegetative propagation ofAesculus indica through stem cuttings treated with plant growth regulators

引用

Journal of Forestry Research 2009年第A2期20卷 171-173,I0004页

作者： Mumtaz majeed M.A. Khan A.H.Mughal Faculty of Forestry Sher-e-Kashmir University of Agricultural Science ＆ Technology Shalimar Srinagar- 191 121 J＆K lndia

Cuttage propagation of Aesculus indica was tested by treatments with different concentrations of indole-3-acetic acid （IAA） @ 2000, 4000 （ppm）, indolebutyric acid （IBA） @ 2000, 4000 （ppm） and naphthlcetic acid （NAA） @ 2000, 4000 （ppm） in dry formulation in the Forest Nursery, Faculty of Forestry, SKUAST-K, Shalimar. The cuttings treated with IBA @ 4000 ppm and IBA @ 2000 ppm had a sprouting rate of 75% and 50%, respectively, which was significantly higher than that of control and other treatments. The highest rooting rate （50%） was recorded in the cuttings with the application of IBA @ 4000 ppm. The cuttings treated with IBA @ 2000 ppm had 25% rooting rate. All other treatments along with control （talc powder） failed to induce rooting. It was concluded that IBA @ 4000 ppm was a better-applied concentration for vegetative propagation ofA. indica under Kashmir conditions.

关键词： Aesculus indica indolebutyric acid rootingi stem cuttings vegetative propagation

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

Investigating the influence of gamma ray energies and steel fiber on attenuation properties of reactive powder concrete

引用

Nuclear Science and Techniques 2017年第10期28卷 113-120页

作者： Shatha D.Mohammed Wasan Z.majeed Nesreen B.Naji Nada Mahdi Fawzi Department of Civil College of EngineeringUniversity of BaghdadBaghdadIraq Department of Physics College of ScienceUniversity of BaghdadBaghdadIraq

The effect of gamma ray energies and volume ratio of micro steel fiber(1 and 1.5%) on attenuation properties of reactive powder concrete(70 MPa compressive strength) was investigated. Different characteristics have been considered such as linear attenuation coefficient,mass attenuation coefficient, and half-value *** iodide crystal with a gamma ray spectrometer and collimated beam of gamma ray has been implemented to perform the experimental test. Three sources(Cs-137, Co-60, and Bi-207) with energies of(0.662, 1.17 1.33, 0.569,and 1.063) MeV were adopted in the test. The results obtained indicated that mass attenuation coefficient is proportioned inversely with gamma ray energies and directly with a volume ratio of micro steel fiber. The linear attenuation coefficient and half-value thickness of the tested samples have been calculated and discussed. The obtained results showed that increasing the volume ratio of steel fiber has modified the adequacy of the reactive powder concrete as a shielding element since it increases the density and reduces the half-value thickness.

关键词：活性粉末混凝土衰减特性射线能量钢纤维性能影响线性衰减系数质量衰减系数纤维体积比

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

Formation of crystalline particles from phase change emulsion： Influence of different parameters

引用

Chinese Journal of Chemical Engineering 2016年第7期24卷 929-936页

作者： Javed Iqbal Zulfiqar Ali Murid Hussain Rizwan Sheikh Khaliq majeed Asad Ullah Khan Joachim Ulrich COMSATS Institute of Information Technology Department of Chemical Engineering Defence Road Off Raiwind Road Lahore Pakistan Martin-Luther-Universitat Halle-Wittenberg Zentrum fur Ingenieurwissenschaften Verfahrenstechnik/TVT D-06099 Halle (Saale) Germany

Solidification or crystallization of phase change emulsion in the form of fine emulsion drops in a direct contact coolant at temperatures below their freezing point was studied. This work is mainly focused on the size and shape of the generated partides from phase change emulsified fats. Size of the particles is the major or key factor being considered during their formation, however, other factors that govern the particle size and shape were also observed. The operating parameters of the process were optimized in order to obtain particles of smaller size ranges in the window of current operating conditions. The crystallization of complex emulsion maffices is very difficult to control in the bulk at desired requirement. Hence, the emulsion drop to particle formation has advan- tage in comparison with the bulk solidification or crystallization. The main objective of this work is to achieve spherical emulsion particles in a direct contact cooling system. Parameters like： stat）ility, characterization, viscos- ity, and the effect of different energy inputs were examined. Moreover, the effects of the capillary size, interracial tension, temperature of the emulsion on the particle size were also monitrored.

关键词： EmulsionParticle formationSizePhase changeInterracial tension

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

Biochemical synthesis of silver nanoprticles using filamentous fungi Penicillium decumbens (MTCC-2494) and its efficacy against A-549 lung cancer cell line

引用

Chinese Journal of Natural Medicines 2016年第8期14卷 615-620页

作者： Shahnaz majeed Mohd Syafiq bin Abdullah Gouri Kumar Dash Mohammed Tahir Ansari Anima Nanda Faculty of Pharmacy and Health Universiti Kuala Lumpur Royal college of Medicine Ipoh Perak Malaysia 30450 Faculty of Bioscience and chemical Engineering Sathyabama University Rajiv Gandhi Salai Chennai 600119 India

Biosynthesis of silver and other metallic nanoparticles is one of the emerging research area in the field of science and technology due to their potentiality, especially in the field of nano-biotechnology and biomedical sciences in order to develop nanomedicine. In our present study, Penicillium decumbens(MTCC-2494) was brought from Institute of Microbial Technology(IMTECH) Chandigarh and employed for extracellular biological synthesis of silver nanoparticles. Ag-NPs formation was appeared with a dark brown color inside the conical flask. Characterization of Ag-NPs were done by UV-Spectrophotometric analysis which showed absorption peak at 430 nm determines the presence of nanoparticles, Fourier transform infrared(FT-IR) spectroscopic analysis, showed amines and amides are the possible proteins involved in the stabilization of nanoparticles as capping agent. Atomic force Microscopy(AFM) confirmed the particle are spherical, size was around 30 to 60 nm and also the roughness of nanoparticles. Field emission scanning electron microscopy(FE-SEM) showed the topology of the nanoparticles and were spherical in shape. The biosynthesis process was found fast, ecofriendly and cost effective. Nano-silver particle was found to have a broad antimicrobial activity and also it showed good enhancement of antimicrobial activity of Carbenicillin, Piperacillin, Cefixime, Amoxicillin, Ofloxacin and Sparfloxacin in a synergistic mode. These Ag-NPs showed good anti-cancer activity at 80 μg·m L^(-1) upon 24 hours of incubation and toxicity increases upon 48 hours of incubation against A-549 human lung cancer cell line and the synergistic formulation of the antibiotic with the synthesized nanoparticles was found more effective against the pathogenic bacteria studied.

关键词： Silver nanoparticles Penicillium decumbens(MTCC-2494) Antibacterial Anti-cancer

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

Ontology-Based Crime News Semantic Retrieval System

引用

Computers, Materials & Continua 2023年第10期77卷 601-614页

作者： Fiaz majeed Afzaal Ahmad Muhammad Awais Hassan Muhammad Shafiq Jin-Ghoo Choi Habib Hamam Department of Information Technology University of GujratGujrat50700Pakistan Department of Computer Science University of Engineering&TechnologyLahore54890Pakistan Department of Information and Communication Engineering Yeungnam UniversityGyeongsan38541Korea Faculty of Engineering Uni de MonctonMonctonNB E1A3E9Canada International Institute of Technology and Management Commune d’AkandaBPLibreville1989Gabon School of Electrical Engineering Department of Electrical and Electronic Engineering ScienceUniversity of JohannesburgJohannesburg2006South Africa Spectrum of Knowledge Production&Skills Development Sfax3027Tunisia

Every day,the media reports tons of crimes that are considered by a large number of users and accumulate on a regular *** news exists on the Internet in unstructured formats such as books,websites,documents,and *** such homogeneous data,it is very challenging to extract relevant information which is a time-consuming and critical task for the public and law enforcement ***-based Information Retrieval(IR)systems rely on statistics to retrieve results,making it difficult to obtain relevant *** are unable to understandthe user’s query and thus facewordmismatchesdue to context changes andthe inevitable semanticsof a given ***,such datasets need to be organized in a structured configuration,with the goal of efficiently manipulating the data while respecting the semantics of the *** ontological semantic IR systemis needed that can find the right investigative information and find important clues to solve criminal *** semantic system retrieves information in view of the similarity of the semantics among indexed data and user *** this paper,we develop anontology-based semantic IRsystemthat leverages the latest semantic technologies including resource description framework(RDF),semantic protocol and RDF query language(SPARQL),semantic web rule language(SWRL),and web ontology language(OWL).We have conducted two *** the first experiment,we implemented a keyword-based textual IR systemusing Apache *** the second experiment,we implemented a semantic systemthat uses ontology to store the data and retrieve precise results with high accuracy using SPARQL *** keyword-based system has filtered results with 51%accuracy,while the semantic system has filtered results with 95%accuracy,leading to significant improvements in the field and opening up new horizons for researchers.

关键词： Web 3.0 crime ontology semantic web knowledge representation

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

NPBMT: A Novel and Proficient Buffer Management Technique for Internet of Vehicle-Based DTNs

引用

Computers, Materials & Continua 2023年第10期77卷 1303-1323页

作者： Sikandar Khan Khalid Saeed Muhammad Faran majeed Salman A.AlQahtani Khursheed Aurangzeb Muhammad Shahid Anwar Department of Computer Science Shaheed Benazir Bhutto University SheringalDir(U)Khyber Pakhtunkhwa18200Pakistan Department of Computer Science Kohsar University MurreePunjab47150Pakistan Department of Computer Engineering College of Computer and Information SciencesKing Saud UniversityP.O.Box 51178Riyadh11543Saudi Arabia Department of AI and Software Gachon UniversitySeongnam-si13120South Korea

Delay Tolerant Networks(DTNs)have the major problem of message delay in the network due to a lack of endto-end connectivity between the nodes,especially when the nodes are *** nodes in DTNs have limited buffer storage for storing delayed *** instantaneous sharing of data creates a low buffer/shortage ***,buffer congestion would occur and there would be no more space available in the buffer for the upcoming *** address this problem a buffer management policy is proposed named“A Novel and Proficient Buffer Management Technique(NPBMT)for the Internet of Vehicle-Based DTNs”.NPBMT combines appropriate-size messages with the lowest Time-to-Live(TTL)and then drops a combination of the appropriate messages to accommodate the newly arrived *** evaluate the performance of the proposed technique comparison is done with Drop Oldest(DOL),Size Aware Drop(SAD),and Drop Larges(DLA).The proposed technique is implemented in the Opportunistic Network Environment(ONE)*** shortest path mapbased movement model has been used as the movement path model for the nodes with the epidemic routing *** the simulation results,a significant change has been observed in the delivery probability as the proposed policy delivered 380 messages,DOL delivered 186 messages,SAD delivered 190 messages,and DLA delivered only 95 messages.A significant decrease has been observed in the overhead ratio,as the SAD overhead ratio is 324.37,DLA overhead ratio is 266.74,and DOL and NPBMT overhead ratios are 141.89 and 52.85,respectively,which reveals a significant reduction of overhead ratio in NPBMT as compared to existing *** network latency average of DOL is 7785.5,DLA is 5898.42,and SAD is 5789.43 whereas the NPBMT latency average is *** reveals that the proposed policy keeps the messages for a short time in the network,which reduces the overhead ratio.

关键词： Delay tolerant networks buffer management message drop policy ONE simulator NPBMT

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

High-frequency field intensity along focal point of a long metallic parabolic reflector coated by a magnetized plasma layer using oblique incidence

引用

Chinese Optics Letters 2015年第9期13卷 14-19页

作者： Abdul Ghaffar majeed A.S.Alkanhal Department of Electrical Engineering King Saud University Department of Physics University of Agriculture

Theoretical analysis of the electromagnetic field distribution in the focal region of a long metallic parabolic reflector that has its surface covered with a magnetized plasma layer is derived. The incident wave is considered to be with a general oblique incidence for both parallel and perpendicular polarizations. The electromagnetic field intensity expressions along the focal region are obtained accurately using Maslov＇s method. The effects of plasma thickness on the reflected and transmitted field distributions are investigated. The effects of other physi- cal parameters such as the angle of incidence and the plasma and cyclotron frequencies on the transmitted field- intensity distribution along the focal region are also studied. The results obtained by Maslov＇s method and Kirchhoff＇s approximation are found to be in a good agreement.

关键词： High-frequency field intensity along focal point of a long metallic parabolic reflector coated by a magnetized plasma layer using oblique incidence TT Ei

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

Specific Capacitance and Cyclic Stability of Graphene Based Metal/Metal Oxide Nanocomposites:A Review

引用

Journal of Materials Science & Technology 2015年第7期31卷 699-707页

作者： Abdul Waheed Anwar Abdul majeed Nadeem Iqbal Wasi Ullah Ahmad Shuaib Usman Ilyas Fozia Bibi Hafiz Muhammad Rafique Nanotechnologies Research Centre Department of PhysicsUniversity of Engineering and Technology Under Graduate Block/School of Physical Sciences University of the Punjab Department of Physics University of the Punjab

Graphene has become a worldwide admired material among researchers and scientists equally due to its unique richness in mechanical strength, electrical conductivity, optical and thermal properties. Re- searchers have explored that the composite materials based on graphene and metal/metal oxide nanostructures possess excellent potential for energy storage technologies. In particular, supercapacitors based on such composite materials have engrossed the extreme interest of researchers for its rapid charging/discharging time, safe operation and longer cyclic constancy. Till now, several fabrication techniques for composite materials and their energy storage applications have been explored. Here, specially, we have concentrated on the hottest research progress for the fabrication of graphene oxide and metal/metal oxide nanocomposites. We also emphasized on the characteristics and properties of supercapacitors fabricated using these composite materials. Moreover, our study is focused on the specific capacitance and cyclic stability of various composites to haul out the most efficient material for supercapacitor applications.

关键词： GrapheneMetal/metal oxide nanostructureSupercapacitor

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

Mini-organs with big impact:Organoids in liver cancer studies

引用

Oncology Research 2023年第5期31卷 677-688页

作者： MUHAMMAD BABAR KHAWAR YAJUN WANG ANEEQA majeed ALI AFZAL KABEER HANEEF HAIBO SUN Institute of Translational Medicine Medical CollegeYangzhou UniversityYangzhouChina Jiangsu Key Laboratory of Experimental and Translational Non-Coding RNA Research YangzhouChina Applied Molecular Biology and Biomedicine Lab Department of ZoologyUniversity of NarowalNarowalPakistan Department of Oncology Haian Hospital of Traditional Chinese MedicineHaianChina Molecular Medicine and Cancer Therapeutics Lab Department of ZoologyFaculty of Sciences TechnologyUniversity of Central PunjabLahorePakistan Chinese Institute for Brain Research(CIBR) BeijingChina

Hepatocellular carcinoma,the most common primary liver cancer and a leading cause of death,is a difficult disease to treat due to its heterogeneous *** models,such as 2D culture and patient-derived xenografts,have not proven ***,the development of 3D culture techniques,such as organoids,which can mimic the tumor microenvironment(TME)and preserve heterogeneity and pathophysiological properties of tumor cells,offers new opportunities for treatment and *** also have the potential for biomarker detection and personalized medication,as well as genome editing using CRISPR/Cas9 to study the behavior of certain genes and therapeutic *** review explores to-the-date development of organoids with a focus on TME modeling in 3D organoid ***,it discusses gene editing using CRISPR/Cas9 in organoids,the challenges faced,and the prospects in the field of organoids.

关键词： Heterogeneity Tumor Organoid Liver Treatment Therapy

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

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：