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Construction and Quality Assurance of Outstanding Applied Horticultural Talent Training Curriculum System under the Background of New Agricultural Science:A Case Study of Huaiyin Institute of Technology
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作者 Xuqin REN Zhinan HUANG +3 位作者 Guanglong WANG Xiaochuan SUN Weike DUAN Cong JIN 《Asian Agricultural Research》 2023年第2期50-54,共5页
Huaiyin Institute of Technology is taken as the research object.The content of horticulture curriculum system under the background of new agricultural science is constructed and elaborated,including theoretical curric... Huaiyin Institute of Technology is taken as the research object.The content of horticulture curriculum system under the background of new agricultural science is constructed and elaborated,including theoretical curriculum system of"three platforms and seven curriculum groups"and practice system of"two platforms,three levels and four modules".Moreover,the quality assurance strategy of the curriculum system is discussed from three angles of enhancing professional emotion,enhancing professional practice and strengthening innovation ability,to reach the training objective of outstanding applied horticultural talents under the background of new agricultural science. 展开更多
关键词 New agricultural science Horticulture specialty Curriculum system Quality assurance
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Experimentation of a Forced Convection Solar Dryer for Drying Sweet Potatoes at the Higher Institute of Technology of Mamou-Guinea
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作者 Ansoumane Sakouvogui Thierno Amadou Barry +1 位作者 Adama Moussa Sakho Mamby Keita 《World Journal of Engineering and Technology》 2023年第3期536-548,共13页
This study was carried out at the Mamou Higher Institute of Technology during the period from March 10 to April 15, 2022, with the aim of designing and testing a solar dryer with forced convection by drying potatoes. ... This study was carried out at the Mamou Higher Institute of Technology during the period from March 10 to April 15, 2022, with the aim of designing and testing a solar dryer with forced convection by drying potatoes. The dryer was designed using local materials. Its main geometric parameters are: 1) height of the drying chamber (90 cm), 2) length of the drying chamber (50 cm), 3) width of the drying chamber (43 cm), 4) surface of the racks (0.1806 m<sup>2</sup>), 5) surface of the heat accumulator (0.2537 m<sup>2</sup>). The experiment focused on the vacuum test of the dryer for two days and that of the drying of the sweet potato for three days from 8:30 a.m. to 5:30 p.m. The average vacuum test temperature values of the three environments are respectively accumulator (43°C), dryer chamber (41°C) and ambient environment (34°C). Four kilograms (4 kg) of boiled sweet potato were dried. The average temperatures in the accumulator and in the drying chamber during the three days of drying are respectively 33°C and 39°C. The final mass of the dried product is 1.2 kg, with a quantity of water extracted of 2 liters or 63% of the initial mass of the product. The average drying rate is 0.074 kg/h. The drying kinetics showed a decreasing rate in the absence of the heating period and the constant rate period. 展开更多
关键词 EXPERIMENTATION TEMPERATURE ACCUMULATOR Forced Convection Solar Dryer Sweet Potato
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Research on the Practice and Development of Teaching Evaluation in Private Colleges and Universities:Taking Xi’an Mingde Institute of Technology as an Example
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作者 Yu Ma 《Journal of Contemporary Educational Research》 2023年第12期358-366,共9页
With the government’s strong support and investment in higher education,private colleges and universities have become an important part of higher education.Teaching evaluation is an important means of monitoring the ... With the government’s strong support and investment in higher education,private colleges and universities have become an important part of higher education.Teaching evaluation is an important means of monitoring the quality of teaching in colleges and universities and a crucial way to improve teaching quality.This article takes Xi’an Mingde Institute of Technology as an example to explore the practice and development of teaching evaluation in private colleges and universities. 展开更多
关键词 Private colleges and universities Teaching evaluation PRACTICE DEVELOPMENT
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Brief Outline of the Metallurgy Department of Kunming Institute of Technology
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作者 刘纯鹏 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1990年第2期143-143,共1页
The metallurgy department of Kunm-ing Institute of Technology,with its empha-sis on nonferrous metallurgy,is one of themajor academic and technical centres underthe China National Nonferrous Metals In-dustry Corporati... The metallurgy department of Kunm-ing Institute of Technology,with its empha-sis on nonferrous metallurgy,is one of themajor academic and technical centres underthe China National Nonferrous Metals In-dustry Corporation(CNNC).The province of Yunnan,of whichKunming is the capital city,is very rich withresources of nonferrous metals,such as 展开更多
关键词 Brief Outline of the Metallurgy Department of Kunming Institute of Technology
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Analysis and Suggestions of the Satisfaction of Postgraduate Education in Engineering Universities —Take Harbin Institute of Technology (Weihai) for Example
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作者 Lianmao Yang Yiqun Liu +1 位作者 Xiaoguo Song Bingfeng Liu 《教育研究前沿(中英文版)》 2022年第2期56-62,共7页
Accelerating the development of students is the basic goal of postgraduate talent cultivation.The final research results,employment situation and satisfaction of postgraduate students with school education are more im... Accelerating the development of students is the basic goal of postgraduate talent cultivation.The final research results,employment situation and satisfaction of postgraduate students with school education are more important indicators of the quality of talent cultivation in a university.For having a deeper understanding of the satisfaction of postgraduates in Harbin Institute of Technology(Weihai)in terms of motivation,tutor situation,management service and employment situation,a questionnaire survey was conducted on postgraduates.The survey results show that the overall satisfaction of postgraduates is high.In terms of studying motivation,most postgraduates think that their majors are more related to employment;in terms of professors,most of them can get along well with their professors and learn from the advantages of their professors;in terms of school management,they respond well to the"library",but think that the"dormitory"and"canteen"need further improvement;in terms of employment,most of postgraduates choose to be employed,while a few of them choose to further their studies,most of which have applied to study in domestic or foreign universities. 展开更多
关键词 Engineering Universities Postgraduate Education SATISFACTION Survey Analysis
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Research on the Dilemma and Countermeasures of Graduate Student Recruitment Publicity in University Branch Area-Based on Harbin Institute of Technology(Weihai)
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作者 Lianmao Yang Yiqun Liu Zaixian Chen 《教育研究前沿(中英文版)》 2022年第3期90-95,共6页
Graduate student recruitment publicity is a very important link in graduate student recruitment,the quality of students directly affects the quality of graduate education.Taking Harbin Institute of Technology(Weihai)a... Graduate student recruitment publicity is a very important link in graduate student recruitment,the quality of students directly affects the quality of graduate education.Taking Harbin Institute of Technology(Weihai)as the research object,this paper analyzes the internal and external factors affecting the improvement of graduate student quality in the branch campus,and carries out the corresponding countermeasures,puts forward the propaganda strategy of all-round research and recruitment,and effectively improves the quality of graduate student in the branch campus. 展开更多
关键词 Graduate Student Recruitment Publicity Countermeasure Research University Branch Area
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MASTER PLAN TO ROBUST PRACTICE: THE EVOLUTION OF SUSTAINABLE LANDSCAPE PRACTICES AT GEORGIA INSTITUTE OF TECHNOLOGY
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作者 Hyacinth Ide Jessica Rose 《Journal of Green Building》 2018年第3期181-192,共12页
Universities across the globe are recognizing the need to implement sustainable land­scaping practices in order to support wildlife, improve water quality and positively impact human health and wellbeing. Georgia... Universities across the globe are recognizing the need to implement sustainable land­scaping practices in order to support wildlife, improve water quality and positively impact human health and wellbeing. Georgia Institute of Technology learned that such sustainable practices, when properly aligned with overarching campus goals, can also enable continuous, collaborative decision-making and student engagement. The Georgia Institute of Technology (Georgia Tech) is a leading research uni­versity situated on 426 acres of land in midtown Atlanta, Georgia, with a student population of 27,000 (Fall 2017). An urban oasis in the center of town, Georgia Tech’s campus offers 312.5 landscaped acres, 3.5 naturalized acres and 110 acres of buildings. The campus is also a level II certified arboretum boasting 12,000+ trees in its urban forest. Prior to the 1990s, Georgia Tech was commonly referred to as a concrete and brick campus with very little landscape. However, in 1999 all that changed when the Georgia Tech administration decided to invest in sustainable landscaping, including the recruitment of qualified staff with specific skill sets to take on this challenge. The Institute’s initial landscape master plan objectives were to reduce impervious surfaces such as surface parking lots, increase woodland coverage and enlarge the tree canopy. A significant amount of sustainable landscape practices and collaborative methods grew from these initial objectives. Establishing a plan with clear goals, having the support of executive leadership and employing the right team members enabled the Georgia Tech campus to be transformed from a concrete jungle to a forested, urban oasis in less than 20 years. 展开更多
关键词 sustainable landscape practices Campus Landscape Master Plan service learning projects living laboratory Tree Campus USA
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A review on current development of thermophotovoltaic technology in heat recovery
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作者 Shuni Chen Yanming Guo +1 位作者 Qinghui Pan Yong Shuai 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2024年第2期297-323,共27页
The burning of fossil fuels in industry results in significant carbon emissions,and the heat generated is often not fully utilized.For high-temperature industries,thermophotovoltaics(TPVs)is an effective method for wa... The burning of fossil fuels in industry results in significant carbon emissions,and the heat generated is often not fully utilized.For high-temperature industries,thermophotovoltaics(TPVs)is an effective method for waste heat recovery.This review covers two aspects of high-efficiency TPV systems and industrial waste heat applications.At the system level,representative results of TPV complete the systems,while selective emitters and photovoltaic cells in the last decade are compiled.The key points of components to improve the energy conversion efficiency are further analyzed,and the related micro/nano-fabrication methods are introduced.At the application level,the feasibility of TPV applications in high-temperature industries is shown from the world waste heat utilization situation.The potential of TPV in waste heat recovery and carbon neutrality is illustrated with the steel industry as an example. 展开更多
关键词 THERMOPHOTOVOLTAIC waste heat recovery micro/nano-fabrication carbon neutrality
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Home-based Detection and Prediction of Diabetic Foot Ulcers at Early Stage Using Sensor Technology and Supervised Learning
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作者 Kamasamudram Bhavya Sai Rishi Raghu +2 位作者 Sai Surya Varshith Nukala Jayashree Jayaraman Vijayashree Jayaraman 《Journal of Harbin Institute of Technology(New Series)》 CAS 2024年第1期26-37,共12页
For years,foot ulcers linked with diabetes mellitus and neuropathy have significantly impacted diabetic patients’ health-related quality of life(HRQoL). Diabetes foot ulcers impact15% of all diabetic patients at some... For years,foot ulcers linked with diabetes mellitus and neuropathy have significantly impacted diabetic patients’ health-related quality of life(HRQoL). Diabetes foot ulcers impact15% of all diabetic patients at some point in their lives. The facilities and resources used for DFU detection and treatment are only available at hospitals and clinics,which results in the unavailability of feasible and timely detection at an early stage. This necessitates the development of an at-home DFU detection system that enables timely predictions and seamless communication with users,thereby preventing amputations due to neglect and severity. This paper proposes a feasible system consisting of three major modules:an IoT device that works to sense foot nodes to send vibrations onto a foot sole,a machine learning model based on supervised learning which predicts the level of severity of the DFU using four different classification techniques including XGBoost,K-SVM,Random Forest,and Decision tree,and a mobile application that acts as an interface between the sensors and the patient. Based on the severity levels,necessary steps for prevention,treatment,and medications are recommended via the application. 展开更多
关键词 diabetic foot ulcer PODIATRY diabetes mellitus healthcare footcare internet of things machine learning human⁃computer interaction
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Energy-Efficient Implementation of BCD to Excess-3 Code Converter for Nano-Communication Using QCA Technology
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作者 Nuriddin Safoev Angshuman Khan +1 位作者 Khudoykulov Zarif Turakulovich Rajeev Arya 《China Communications》 SCIE CSCD 2024年第6期103-111,共9页
Code converters are essential in digital nano communication;therefore,a low-complexity optimal QCA layout for a BCD to Excess-3 code converter has been proposed in this paper.A QCA clockphase-based design technique wa... Code converters are essential in digital nano communication;therefore,a low-complexity optimal QCA layout for a BCD to Excess-3 code converter has been proposed in this paper.A QCA clockphase-based design technique was adopted to investigate integration with other complicated circuits.Using a unique XOR gate,the recommended circuit’s cell complexity has been decreased.The findings produced using the QCADesigner-2.0.3,a reliable simulation tool,prove the effectiveness of the current structure over earlier designs by considering the number of cells deployed,the area occupied,and the latency as design metrics.In addition,the popular tool QCAPro was used to estimate the energy dissipation of the proposed design.The proposed technique reduces the occupied space by∼40%,improves cell complexity by∼20%,and reduces energy dissipation by∼1.8 times(atγ=1.5EK)compared to the current scalable designs.This paper also studied the suggested structure’s energy dissipation and compared it to existing works for a better performance evaluation. 展开更多
关键词 BCD code converter Excess-3 nano communication QCA circuits
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Exploring the combination of biochar‐amended soil and automated irrigation technology for water regulation and preservation in green infrastructure
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作者 Honghu Zhu Yuanxu Huang +4 位作者 Haihong Song Jian Chen Songlei Han Tanwee Mazumder Ankit Garg 《Deep Underground Science and Engineering》 2024年第1期39-52,共14页
Biochar is a carbon sink material with the potential to improve water retention in various soils.However,for the long‐term maintenance of green infrastructure,there is an additional need to regulate the water content... Biochar is a carbon sink material with the potential to improve water retention in various soils.However,for the long‐term maintenance of green infrastructure,there is an additional need to regulate the water contents in the covers to maintain vegetation growth in semiarid conditions.In this study,biochar‐amended soil was combined with subsurface drip irrigation,and the water preservation characteristics of this treatment were investigated through a series of one‐dimensional soil column tests.To ascertain the best treatment method specific to semiarid climatic conditions,the test soil was amended with 0%,1%,3%,and 5%biochar.Automatic irrigation devices equipped with soil moisture sensors were used to control the subsurface water content with the aim of enhancing vegetation growth.Each soil column test lasted 150 h,during which the volumetric water contents and soil suction data were recorded.The experimental results reveal that the soil specimen amended with 3%biochar is the most water‐saving regardless of the time cost.Soil with a higher biochar content(e.g.,5%)consumes a more significant amount of water due to the enhancement of the water‐holding capacity.Based on the experimental results,it can be concluded that the appropriate ratio can be determined within 1%–3%,which can reduce not only the amount of irrigated/used water but also the time cost.Such technology can be explored for water content regulation in green infrastructure and the development of barriers for protecting the environment around deep underground waste containment. 展开更多
关键词 BIOCHAR drip irrigation UNDERGROUND water preservation water regulation
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Research on the Design of Innovative Play Blind Box Based on AR Digital Technology Empowering Traditional Intangible Cultural Heritage
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作者 Zhilin Gu Junhong Liu 《Journal of Electronic Research and Application》 2024年第3期53-59,共7页
The development of science and technology,especially the rise of augmented reality(AR)technology provides a new way for the inheritance and innovation of traditional intangible cultural heritage.Based on the design an... The development of science and technology,especially the rise of augmented reality(AR)technology provides a new way for the inheritance and innovation of traditional intangible cultural heritage.Based on the design and research of the tide play blind box of AR digital technology empowering traditional intangible cultural heritage,this paper discusses the application and feasibility of AR technology in the traditional intangible cultural heritage,analyzes the strategy of implementing AR technology empowering intangible cultural heritage,and puts forward corresponding countermeasures for the challenges that may be faced,aiming at providing new ideas and methods for traditional intangible cultural heritage and modern science and technology. 展开更多
关键词 Augmented reality technology Intangible cultural heritage INHERITANCE Innovation
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Research and Analysis of Grammatical Error Correction Technology for Chinese Documents
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作者 Wei Jin Feng Jiang +2 位作者 Xiulai Wang Ningling Ma Yutao Zhang 《Journal of Computer and Communications》 2024年第8期202-223,共22页
With the widespread use of Chinese globally, the number of Chinese learners has been increasing, leading to various grammatical errors among beginners. Additionally, as domestic efforts to develop industrial informati... With the widespread use of Chinese globally, the number of Chinese learners has been increasing, leading to various grammatical errors among beginners. Additionally, as domestic efforts to develop industrial information grow, electronic documents have also proliferated. When dealing with numerous electronic documents and texts written by Chinese beginners, manually written texts often contain hidden grammatical errors, posing a significant challenge to traditional manual proofreading. Correcting these grammatical errors is crucial to ensure fluency and readability. However, certain special types of text grammar or logical errors can have a huge impact, and manually proofreading a large number of texts individually is clearly impractical. Consequently, research on text error correction techniques has garnered significant attention in recent years. The advent and advancement of deep learning have paved the way for sequence-to-sequence learning methods to be extensively applied to the task of text error correction. This paper presents a comprehensive analysis of Chinese text grammar error correction technology, elaborates on its current research status, discusses existing problems, proposes preliminary solutions, and conducts experiments using judicial documents as an example. The aim is to provide a feasible research approach for Chinese text error correction technology. 展开更多
关键词 Chinese Text Error Judicial Documents Neural Network Deep Learning TRANSFORMER
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Research and Application of Recycled Concrete Technology in Prefabricated Buildings
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作者 Shanshan DENG Gang SHI +3 位作者 Chao SHANG Fuchuan ZHOU Masabo Gasper Masiko M.Kaziana 《Research and Application of Materials Science》 2024年第1期33-36,共4页
The utilization of waste concrete as a raw material for recycled concrete in the domain of prefabricated components is garnering greater interest.This paper delineates and examines the concept,categorization,methodolo... The utilization of waste concrete as a raw material for recycled concrete in the domain of prefabricated components is garnering greater interest.This paper delineates and examines the concept,categorization,methodologies of preparation,applicable sectors,and evaluative metrics of recycled concrete technology,highlighting its prospective benefits.Nonetheless,for the successful integration of recycled concrete technology into prefabricated component applications,it is imperative to systematically enhance its physical,mechanical,and attributes,as well as its environmental efficacy.Moreover,to foster the continued advancement of recycled concrete technology,innovative initiatives,standardization,educational programs,demonstration projects,and collaborative efforts are crucial to promote broader adoption and realize improved outcomes within the realm of prefabricated components.In conclusion,recycled concrete technology is poised to play a pivotal role in prefabricated construction,offering robust support for propelling the construction industry towards a sustainable future. 展开更多
关键词 recycled concrete prefabricated buildings Environmental performance assessment
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One-step rapid preparation of CL-20/TNT co-crystal assembly and spheroidized coating based on droplet microfluidic technology 被引量:1
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作者 Jiahui Shi Bidong Wu +4 位作者 Jinqiang Zhou Dawei Ren Dongxu Zhang Chongwei An Jingyu Wang 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2023年第9期251-262,共12页
Energetic materials pose challenges in preparation and handling due to their contradictory properties of high-energy and low-sensitivity.The emergence of co-crystal explosives is a new opportunity to change this situa... Energetic materials pose challenges in preparation and handling due to their contradictory properties of high-energy and low-sensitivity.The emergence of co-crystal explosives is a new opportunity to change this situation.If the co-crystal explosive is coated into spherical particles with uniform particle size distribution,this contradiction can be further reduced.Therefore,binder-coated hexanitrohexaazaisowurtzitane/2,4,6-trinitrotoluene(CL-20/TNT)co-crystal microspheres were prepared by droplet microfluidic technology in this work.The coating effects of different binder formulations of nitrocellulose(NC)and NC/fluorine rubber(F2604)on the co-crystal spheres were studied.The scanning electron microscopy(SEM)results showed that the use of droplet microfluidic technology with the above binders can provide co-crystal microspheres with regular spherical morphology,uniform particle size distribution and good dispersion.X-ray diffraction(XRD),fourier-transform infrared(FT-IR),differential scanning calorimetry(DSC)and thermo-gravimetric(TG)methods were employed to compare the properties of the co-crystal microspheres,raw material and pure co-crystal.The formation of CL-20/TNT co-crystal in the microspheres was confirmed,and the co-crystal microspheres exhibited better thermal stability than the raw material and pure co-crystal.In addition,the mechanical sensitivity and combustion performance of the co-crystal microspheres were further studied.The results showed that the co-crystal microspheres were more insensitive than CL-20 and pure co-crystal,and displayed excellent self-sustained combustion performance and theoretical detonation performance.This study provides a new method for the fast,simple and one-step preparation of CL-20/TNT co-crystal microspheres,with binder coating,uniform particle size distribution,and excellent performance level. 展开更多
关键词 Droplet microfluidics CL-20 TNT CO-CRYSTAL Spherical coating
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Applications of nanotechnology in medical field: a brief review 被引量:1
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作者 Abid Haleem Mohd Javaid +2 位作者 Ravi Pratap Singh Shanay Rab Rajiv Suman 《Global Health Journal》 2023年第2期70-77,共8页
Nanotechnology has extensive application as nanomedicine in the medical field.Some nanoparticles have possible applications in novel diagnostic instruments,imagery and methodologies,targeted medicinal products,pharmac... Nanotechnology has extensive application as nanomedicine in the medical field.Some nanoparticles have possible applications in novel diagnostic instruments,imagery and methodologies,targeted medicinal products,pharmaceutical products,biomedical implants,and tissue engineering.Today treatments of high toxicity can be administered with improved safety using nanotechnology,such as chemotherapeutic cancer drugs.Further,wearable gadgets can detect crucial changes in vital signs,cancer cell conditions,and infections that are genuinely happening in the body.We anticipate these technologies to provide doctors with considerably much better direct access to critical data on the reasons for changes in the signs of life or illness because of the technological presence at the source of the problem.Biomedicine can be utilised for therapies with predictive analytics and artificial intelligence.For carrying out this study,relevant papers on Nanotechnology in the medical field from Scopus,Google scholar,ResearchGate,and other research platforms are identified and studied.The study discusses different types of Nanoparticles used in the medical field.This paper discusses nanotechnology applications in the medical field.The class,features,and characteristics of Nanotechnology for medicine are also briefed.Scientists,governments,civil society organisations,and the general public will need to collaborate across sectors to assess the significance of nanotechnology and guide its advancement in various fields.The current research includes several possible Nanotechnology uses in the medical field.As a result,the study provides a brief and well-organised report on nanotechnology that should be valuable to researchers,engineers,and scientists for future research projects. 展开更多
关键词 NANOTECHNOLOGY NANOMEDICINE NANOPARTICLES MEDICAL Treatment
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Drilling-based measuring method for the c-φ parameter of rock and its field application 被引量:3
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作者 Bei Jiang Fenglin Ma +5 位作者 Qi Wang Hongke Gao Dahu Zhai Yusong Deng Chuanjie Xu Liangdi Yao 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2024年第1期65-76,共12页
The technology of drilling tests makes it possible to obtain the strength parameter of rock accurately in situ. In this paper, a new rock cutting analysis model that considers the influence of the rock crushing zone(R... The technology of drilling tests makes it possible to obtain the strength parameter of rock accurately in situ. In this paper, a new rock cutting analysis model that considers the influence of the rock crushing zone(RCZ) is built. The formula for an ultimate cutting force is established based on the limit equilibrium principle. The relationship between digital drilling parameters(DDP) and the c-φ parameter(DDP-cφ formula, where c refers to the cohesion and φ refers to the internal friction angle) is derived, and the response of drilling parameters and cutting ratio to the strength parameters is analyzed. The drillingbased measuring method for the c-φ parameter of rock is constructed. The laboratory verification test is then completed, and the difference in results between the drilling test and the compression test is less than 6%. On this basis, in-situ rock drilling tests in a traffic tunnel and a coal mine roadway are carried out, and the strength parameters of the surrounding rock are effectively tested. The average difference ratio of the results is less than 11%, which verifies the effectiveness of the proposed method for obtaining the strength parameters based on digital drilling. This study provides methodological support for field testing of rock strength parameters. 展开更多
关键词 Digital drilling Rock crushing zone c-u parameter Measurement method Field application
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Tracking Regulatory Mechanism of Trace Fe on Graphene Electromagnetic Wave Absorption 被引量:2
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作者 Kaili Zhang Yuhao Liu +5 位作者 Yanan Liu Yuefeng Yan Guansheng Ma Bo Zhong Renchao Che Xiaoxiao Huang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2024年第4期79-96,共18页
Polarization and conductance losses are the fundamental dielectric attenuation mechanisms for graphene-based absorbers, but it is not fully understood in revealing the loss mechanism of affect graphene itself. For the... Polarization and conductance losses are the fundamental dielectric attenuation mechanisms for graphene-based absorbers, but it is not fully understood in revealing the loss mechanism of affect graphene itself. For the first time, the reduced graphene oxide(RGO) based absorbers are developed with regulatory absorption properties and the absorption mechanism of RGO is mainly originated from the carrier injection behavior of trace metal Fe nanosheets on graphene. Accordingly, the minimum reflection loss(RLmin) of Fe/RGO-2composite reaches-53.38 dB(2.45 mm), and the effective absorption bandwidth achieves 7.52 GHz(2.62 mm) with lower filling loading of 2 wt%. Using off-axis electron hologram testing combined with simulation calculation and carrier transport property experiments, we demonstrate here the carrier injection behavior from Fe to graphene at the interface and the induced charge accumulation and rearrangement, resulting in the increased interfacial and dipole polarization and the conductance loss. This work has confirmed that regulating the dielectric property of graphene itself by adding trace metals can not only ensure good impedance matching, but also fully exploit the dielectric loss ability of graphene at low filler content,which opens up an efficient way for designing lightweight absorbers and may be extended to other types materials. 展开更多
关键词 Reduced graphene oxide Fe nanosheets Dielectric loss Electromagnetic wave absorption
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Jet formation and penetration performance of a double-layer charge liner with chemically-deposited tungsten as the inner liner 被引量:2
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作者 Bihui Hong Wenbin Li +2 位作者 Yiming Li Zhiwei Guo Binyou Yan 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第3期374-385,共12页
This paper proposes a type of double-layer charge liner fabricated using chemical vapor deposition(CVD)that has tungsten as its inner liner.The feasibility of this design was evaluated through penetration tests.Double... This paper proposes a type of double-layer charge liner fabricated using chemical vapor deposition(CVD)that has tungsten as its inner liner.The feasibility of this design was evaluated through penetration tests.Double-layer charge liners were fabricated by using CVD to deposit tungsten layers on the inner surfaces of pure T2 copper liners.The microstructures of the tungsten layers were analyzed using a scanning electron microscope(SEM).The feasibility analysis was carried out by pulsed X-rays,slug-retrieval test and static penetration tests.The shaped charge jet forming and penetration law of inner tungsten-coated double-layer liner were studied by numerical simulation method.The results showed that the double-layer liners could form well-shaped jets.The errors between the X-ray test results and the numerical results were within 11.07%.A slug-retrieval test was found that the retrieved slug was similar to a numerically simulated slug.Compared with the traditional pure copper shaped charge jet,the penetration depth of the double-layer shaped charge liner increased by 11.4% and>10.8% respectively.In summary,the test results are good,and the numerical simulation is in good agreement with the test,which verified the feasibility of using the CVD method to fabricate double-layer charge liners with a high-density and high-strength refractory metal as the inner liner. 展开更多
关键词 Shaped charge Chemical vapor deposition TUNGSTEN Double-layer charge liner X-ray PENETRATION
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An ionic liquid-assisted strategy for enhanced anticorrosion of low-energy PEO coatings on magnesium–lithium alloy 被引量:2
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作者 You Zhang Chuping Chen +3 位作者 Haoyue Tian Shuqi Wang Chen Wen Fei Chen 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2024年第6期2380-2396,共17页
A low-energy plasma electrolytic oxidation(LePEO)technique is developed to simultaneously improve energy efficiency and anti-corrosion.Ionic liquids(1-butyl-3-methylimidazole tetrafluoroborate(BmimBF_(4)))as sustainab... A low-energy plasma electrolytic oxidation(LePEO)technique is developed to simultaneously improve energy efficiency and anti-corrosion.Ionic liquids(1-butyl-3-methylimidazole tetrafluoroborate(BmimBF_(4)))as sustainable corrosion inhibitors are chosen to investigate the corrosion inhibition behavior of ionic liquid(ILs)during the LePEO process for LA91 magnesium-lithium(Mg-Li)alloy.Results show that the ionic liquid BmimBF_(4)participates in the LePEO coating formation process,causing an increment in coating thickness and surface roughness.The low conductivity of the ionic liquid is responsible for the voltage and breakdown voltage increases during the LePEO with IL process(LePEO-IL).After adding BmimBF_(4),corrosion current density decreases from 1.159×10^(−4)A·cm^(−2)to 8.143×10^(−6)A·cm^(−2).The impedance modulus increases to 1.048×10^(4)Ω·cm^(−2)and neutral salt spray remains intact for 24 h.The superior corrosion resistance of the LePEO coating assisted by ionic liquid could be mainly attributed to its compact and thick barrier layer and physical absorption of ionic liquid.The ionic liquid-assisted LePEO technique provides a promising approach to reducing energy consumption and improving film performance. 展开更多
关键词 Magnesium-lithium alloy Plasma electrolytic oxidation Low energy Ionic liquid Corrosion resistance
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