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Systematic review of mixing technology for recycling waste tailings as cemented paste backfill in mines in China 被引量:5
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作者 Liuhua Yang Jincang Li +4 位作者 Hongbin Liu Huazhe Jiao Shenghua Yin Xinming Chen Yang Yu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2023年第8期1430-1443,共14页
The development of industry is inseparable from the support of mining.However,mining processes consume a large amount of energy,and increased tailing emissions can have a significant impact on the environment.In the p... The development of industry is inseparable from the support of mining.However,mining processes consume a large amount of energy,and increased tailing emissions can have a significant impact on the environment.In the past few decades,the mining industry developed many technologies that are related to mineral energy management,of which cemented paste backfill(CPB)is one of the representative technologies.CPB has been successfully applied to mine ground control and tailings management.In CPB technology,the mixing process is the key to achieving materials with good final quality and controlled properties.However,in the preparation process,the mixed homogeneity of the CPB is difficult to achieve because of fine tailings,high solid volume fraction,and high viscosity.Most research focused on the effect of mixing ingredients on CPB properties rather than on the preparation process of the CPB.Therefore,improving the performance and reducing the production cost of CPB by optimizing the mixing process are important.This review summarizes the current studies on the mixing technology of CPB and its application status in China.Then,it compares the advantages and disadvantages of multiple mixing equipment and discusses the latest results and research hotspots in paste preparation.Finally,it concludes the challenges and development trends of mixing technology on the basis of the relevant application cases in China to promoting cement-based material mixing technology development. 展开更多
关键词 cemented paste backfill mixed homogeneity mixing technology cement-based material
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Research Progress of On-line Monitoring Technology for Electromagnetic Environment of Power Transmission and Transformation Projects
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作者 Li Peiming Zhou Jian +2 位作者 Xiao Jun Wang Wenjin Ge Xiaoyang 《Meteorological and Environmental Research》 CAS 2019年第6期67-71,共5页
Based on the collection of relevant literature and cases,the research and application status of on-line monitoring technology for electromagnetic environment of power transmission and transformation projects at home a... Based on the collection of relevant literature and cases,the research and application status of on-line monitoring technology for electromagnetic environment of power transmission and transformation projects at home and abroad were introduced.Moreover,the problems existing in the on-line monitoring of electromagnetic environment were expounded,and the development prospect was forecasted. 展开更多
关键词 on-line monitoring technology ELECTROMAGNETIC environment Power TRANSMISSION and TRANSFORMATION PROJECT
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Comprehensive Evaluation of Talent Training Model for Modern Rehabilitation Therapy Technology:A Case Study of School Y
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作者 Wei Yan Chunxia Hu +1 位作者 Surui Zhao Chen Wang 《Journal of Contemporary Educational Research》 2024年第7期24-29,共6页
The purpose of this study is to comprehensively evaluate the modern training model of rehabilitation therapy technology talents.Selecting the third-year students of the rehabilitation therapy technology program in Sch... The purpose of this study is to comprehensively evaluate the modern training model of rehabilitation therapy technology talents.Selecting the third-year students of the rehabilitation therapy technology program in School Y as the research subject,300 questionnaires were collected and the effective response rate was 92%.The strengths and weaknesses of the modern training model were analyzed through a mixed qualitative and quantitative research method.It was found that 68%of the students thought that the modern model had obvious advantages in practical teaching,but 42%of the students thought that it still needed to be improved in personalized teaching.This study provides an empirical basis and specific suggestions for optimizing the cultivation of rehabilitation therapy technology talents. 展开更多
关键词 Rehabilitation therapy technology Talent training model mixed qualitative and quantitative research Empirical research
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Research on the Agricultural Remote Sensing Image Enhancement Technology Based on the Mixed Entropy Model
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作者 ZHANG Youzhi 《International English Education Research》 2019年第2期78-80,共3页
Uncertainty is the most important factor affecting the quality of the remote sensing image classification.Aiming at the characteristics ofboth the random and the fuzzy uncertainties in the process of the remote sensin... Uncertainty is the most important factor affecting the quality of the remote sensing image classification.Aiming at the characteristics ofboth the random and the fuzzy uncertainties in the process of the remote sensing image classification,a method based on the mixed entropy model is proposed to measure these two uncertainties comprehensively,and a multi-scale evaluation index is established.Based on the analysis of the basic principles of the mixed entropy model,a method of using the statistical data of the feature space and the fuzzy classifier to establish the information entropy,the fuzzy entropy and the mixed entropy is proposed.At the same time,on the scale of the pixel and the category,the index of the mixed entropy of the pixel and the mixed entropy of the category are established to evaluate the uncertainty of the classification. 展开更多
关键词 mixED ENTROPY model AGRICULTURAL REMOTE sensing image ENHANCEMENT technology RESEARCH
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Influence of Processing Technology on Mooney Viscosity and Burning Time of Mixed Rubber
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作者 Qi Liu Hui Li 《Research and Application of Materials Science》 2019年第1期24-27,共4页
The influence of mixed rubber processing technology on Mooney viscosity and burning time was studied.The results showed that the Mooney viscosity of mixed rubber increased with the extension of the parking time,and th... The influence of mixed rubber processing technology on Mooney viscosity and burning time was studied.The results showed that the Mooney viscosity of mixed rubber increased with the extension of the parking time,and the burning time did not change significantly.With the increase of the number of thin pass,the Mooney viscosity of mixed rubber decreases continuously,and the burning time varies with different thin pass temperature. 展开更多
关键词 mixED RUBBER PROCESSING technology Mooney VISCOSITY BURNING TIME BoTong
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Construction Technology of Warm Mix Asphalt Pavement in Cold High-Altitude Areas
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作者 Guangxi Wu 《Journal of Architectural Research and Development》 2023年第5期27-33,共7页
With the continuous development of domestic highway construction,highway civil engineering and service level quality have attracted much attention.Good pavement quality and high-quality service make people feel comfor... With the continuous development of domestic highway construction,highway civil engineering and service level quality have attracted much attention.Good pavement quality and high-quality service make people feel comfortable and smooth when traveling.High-quality pavement can significantly reduce the probability of traffic accidents.At present,there is a direct relationship between pavement quality and pavement construction operations.Carrying out pavement construction operations in cold high-altitude areas requires a reasonable selection of construction equipment and methods.The application of warm-mix asphalt pavement construction technology can ensure pavement quality.Therefore,this paper analyzes the advantages of warm-mix technology,the environmental characteristics of cold high-altitude areas,and construction preparations,and discusses the construction technology of warm-mix asphalt pavement in cold high-altitude areas in detail,to improve the overall road quality of cold high-altitude areas. 展开更多
关键词 Cold high-altitude areas Warm mix asphalt Pavement construction technology
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Exploration of Mixed Teaching Pattern of Engineering Mechanics Course under the Background of Information Technology
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作者 Yanxia Wang 《教育研究前沿(中英文版)》 2015年第4期95-98,共4页
关键词 信息技术 混合 力学 设计 路线 教学模式 内容建设
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Application of Uniform Experimental Design in Optimizing Excitation Parameters for Magnetic Frequency Mixing Measurements 被引量:2
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作者 Yu Chang Jingpin Jiao +3 位作者 Xiucheng Liu Guanghai Li Cunfu He Bin Wu 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2020年第1期197-209,共13页
Excitation parameter preferences are key factors a ecting the performance of magnetic frequency mixing detection.A uniform experimental design method was used to analyze this influence.Using fuzzy theory,a comprehensi... Excitation parameter preferences are key factors a ecting the performance of magnetic frequency mixing detection.A uniform experimental design method was used to analyze this influence.Using fuzzy theory,a comprehensive model is established for evaluating the e ect of magnetic frequency mixing.A polynomial is selected as the regression function to express explicitly the correlation between the excitation parameters and the frequency-mixing e ect.The excitation parameters were then optimized using genetic algorithm.Magnetic frequency mixing experiments were conducted to measure the surface hardness of some ferromagnetic materials.Frequency mixing is further enhanced under the optimal settings,resulting in an improvement in the measurement sensitivity.The results of this study support the application of the magnetic frequency mixing technique in non-destructive testing. 展开更多
关键词 MAGNETIC frequency mixing technology EXCITATION parameters UNIFORM experimental design Regression STATISTICAL method Surface HARDNESS measurement
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PMOXA/PAA Brushes toward on-Line Preconcentration for BSA in Capillary Electrophoresis
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作者 Xiao-ru Liu Chao Pan Yan-mei Wang 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2019年第4期497-507,I0003,共12页
In this work, a binary-mixed-brushes-coated (BBC) capillary with switchable protein adsorption/desorption properties was developed and applied for on-line preconcentration of proteins. Firstly, amine-terminated poly(2... In this work, a binary-mixed-brushes-coated (BBC) capillary with switchable protein adsorption/desorption properties was developed and applied for on-line preconcentration of proteins. Firstly, amine-terminated poly(2-methyl-2-oxazoline)(PMOXA-NH2) and thiolterminated poly(acrylic acid)(PAA-SH) were synthesized by using cationic ring-opening polymerization (CROP) and reversible addition fragmentation chain transfer (RAFT) polymerization, respectively. Then, the BBC capillary based on poly(2-methyl-2-oxazoline)(PMOXA) and poly(acrylic acid)(PAA) was prepared by sequentially grafting of PMOXA-NH2 and PAA-SH onto fused-silica capillary inner surface through poly(dopamine)(PDA) as an anchor. The obtained PMOXA/PAA coating formed on the capillary or capillary's raw material was characterized in terms of the thickness, surface chemical composition by using scanning electron microscope (SEM) and X-ray photoelectron spectrum (XPS). The switchable protein adsorption/desorption performance of the BBC capillary was investigated by using fluorescence microscope under di erent solutions with certain pH and ionic strength(I). The results showed that bovine serum albumin (BSA) could be adsorbed on BBC capillary at pH=5.0 (I=10^-5 mol/L), and then the adsorbed BSA could be released at pH=9.0 (I=0.1 mol/L). This switchable protein adsorption/desorption property of coated capillary was then used to preconcentrate proteins on-line for increasing the detection sensitivity of BSA in capillary electrophoresis (CE). With this method, a sensitivity enhancement factor (SEF) more than 5000 for BSA detection was obtained. 展开更多
关键词 mixed brush coating Switchable properties on-line preconcentration Capillary electrophoresis Detection sensitivity
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Research on Energy Decision System based on Network Technology
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作者 Quan Li 《International Journal of Technology Management》 2013年第1期46-48,共3页
This paper analyzes the C/S structure and B/S structure of their own characteristics, building energy decision support system based on network technology, elaborated Web GIS and database connections and other technica... This paper analyzes the C/S structure and B/S structure of their own characteristics, building energy decision support system based on network technology, elaborated Web GIS and database connections and other technical principles and applications. Mixed B/S structure mode development to achieve information management, energy consumption is forecast to show the query using the amomat of energy, energy supply and demand dynamic equilibrimn analysis and other functions, with simple, efficient, easy to operate and so on, and has good scalability and maintainability. 展开更多
关键词 Web technologies mixed B/S structure Energy Decision Support System
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Design and synthesis of Al-MOF/PPSU mixed matrix membrane with pollution resistance 被引量:5
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作者 Shujuan Xiao Xiaowen Huo +3 位作者 Shuxin Fan Kui Zhao Shouwu Yu Xiaoyao Tan 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2021年第1期110-120,共11页
To enhance the performance of the polyphenylene sulfone(PPSU) membrane,a novel mixed matrix membrane with hydrophilicity and antifouling properties was prepared.Using PPSU as the ba sic membrane material,polyvinyl pyr... To enhance the performance of the polyphenylene sulfone(PPSU) membrane,a novel mixed matrix membrane with hydrophilicity and antifouling properties was prepared.Using PPSU as the ba sic membrane material,polyvinyl pyrrolidone(PVP) as the porogen,N-Methyl pyrrolidone(NMP) as the solvent,and MOF-CAU-1(Al_(4)(OH)_(2)(OCH_(3))_4(H_2 N-BDC)_(3)·xH_(2) O) as the filler,PPSU/CAU-1 mixed matrix membrane(MMM) was prepared by an immersion precipitation and phase transformation technique.By changing the amount of MOF-CAU-1,the properties and performance of the MMM membrane were investigated in terms of hydrophilicity,pore morphology,surface roughness,and dye removal.The results show that the highest pure water flux of the mixed reached 47.9 L·m^(-2)·h^(-1), when the CAU-1 addition amount was 1.0 wt%, which was 23% higher than that of the pure PPSU membrane.Both the rejection rate and the antifouling performance of the MMM membrane also noticeably improved. 展开更多
关键词 mixed matrix membranes ANTIFOULING Metal-organic frameworks Membrane separation technology
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Review on recent progress in on-line monitoring technology for atmospheric pollution source emissions in China 被引量:3
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作者 Huanqin Wang Jitong Zhou +20 位作者 Xue Li Qiang Ling Hongyuan Wei Lei Gao Ying He Ming Zhu Xiao Xiao Youjiang Liu Shan Li Chilai Chen Guotao Duan Zhimin Peng Peili Zhou Yufeng Duan Jianbing Wang Tongzhu Yu Yixin Yang Jiguang Wang Zhen Zhou Huaqiao Gui Yanjun Ding 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2023年第1期367-386,共20页
Emissions from mobile sources and stationary sources contribute to atmospheric pollution in China,and its components,which include ultrafine particles(UFPs),volatile organic compounds(VOCs),and other reactive gases,su... Emissions from mobile sources and stationary sources contribute to atmospheric pollution in China,and its components,which include ultrafine particles(UFPs),volatile organic compounds(VOCs),and other reactive gases,such as NH3and NOx,are the most harmful to human health.China has released various regulations and standards to address pollution from mobile and stationary sources.Thus,it is urgent to develop online monitoring technology for atmospheric pollution source emissions.This study provides an overview of the main progress in mobile and stationary source monitoring technology in China and describes the comprehensive application of some typical instruments in vital areas in recent years.These instruments have been applied to monitor emissions from motor vehicles,ships,airports,the chemical industry,and electric power generation.Not only has the level of atmospheric environment monitoring technology and equipment been improving,but relevant regulations and standards have also been constantly updated.Meanwhile,the developed instruments can provide scientific assistance for the successful implementation of regulations.According to the potential problem areas in atmospheric pollution in China,some research hotspots and future trends of atmospheric online monitoring technology are summarized.Furthermore,more advanced atmospheric online monitoring technology will contribute to a comprehensive understanding of atmospheric pollution and improve environmental monitoring capacity. 展开更多
关键词 Atmospheric pollution Mobile sources Stationary sources on-line monitoring technology
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Study on Escaping Fluorine Inhibition in Calcining Process of Mixed Rare Earth Concentrate 被引量:2
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作者 吴志颖 吴文远 +2 位作者 孙树臣 边雪 涂赣峰 《Journal of Rare Earths》 SCIE EI CAS CSCD 2007年第S1期129-132,共4页
GC technology was used to study escaping fluorine in calcined process of mixed rare earth concentrate. The mixed rare earth concentrate and it adding assistant of CaO-NaCl-CaCl2 were calcined at 400~750 ℃ for 30~12... GC technology was used to study escaping fluorine in calcined process of mixed rare earth concentrate. The mixed rare earth concentrate and it adding assistant of CaO-NaCl-CaCl2 were calcined at 400~750 ℃ for 30~120 min, and then total amount of fluorine, exhausting ratio of fluorine, decomposition ratio and the component were determined. The results showed that adding CaO-NaCl-CaCl2 the decomposition ratio was up to 90% at 700 ℃ in 1 h, and the escaping ratio of fluorine decreased from 29.52% to 0.948%. The average inhabitation ratio was 98.39%. This method supplied basis for low energy and clean decomposition of mixed rare earth concentrate. 展开更多
关键词 mixed rare earth concentrate CaO-NaCl-CaCl_2 roaste fixed fluorine GC technology
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Mixed reality for visualization of orthopedic surgical anatomy 被引量:3
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作者 Dimitrios Chytas Vasileios S Nikolaou 《World Journal of Orthopedics》 2021年第10期727-731,共5页
In the modern era,preoperative planning is substantially facilitated by artificial reality technologies,which permit a better understanding of patient anatomy,thus increasing the safety and accuracy of surgical interv... In the modern era,preoperative planning is substantially facilitated by artificial reality technologies,which permit a better understanding of patient anatomy,thus increasing the safety and accuracy of surgical interventions.In the field of orthopedic surgery,the increase in safety and accuracy improves treatment quality and orthopedic patient outcomes.Artificial reality technologies,which include virtual reality(VR),augmented reality(AR),and mixed reality(MR),use digital images obtained from computed tomography or magnetic resonance imaging.VR replaces the user’s physical environment with one that is computer generated.AR and MR have been defined as technologies that permit the fusing of the physical with the virtual environment,enabling the user to interact with both physical and virtual objects.MR has been defined as a technology that,in contrast to AR,enables users to visualize the depth and perspective of the virtual models.We aimed to shed light on the role that MR can play in the visualization of orthopedic surgical anatomy.The literature suggests that MR could be a valuable tool in orthopedic surgeon’s hands for visualization of the anatomy.However,we remark that confusion exists in the literature concerning the characteristics of MR.Thus,a more clear description of MR is needed in orthopedic research,so that the potential of this technology can be more deeply understood. 展开更多
关键词 Orthopedic surgery mixed reality ANATOMY Augmented reality Threedimensional visualization technologies Artificial reality technologies
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Testing a mobile app for child abuse treatment: A mixed methods study 被引量:1
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作者 Shuhong Luo Ann S.Botash 《International Journal of Nursing Sciences》 CSCD 2020年第3期320-329,共10页
Objective:This study provides a preliminary evaluation of the usability and acceptability of a mobile application(sexual assault care algorithm,SACA).Methods:An explanatory sequential mixed methods research was used.A... Objective:This study provides a preliminary evaluation of the usability and acceptability of a mobile application(sexual assault care algorithm,SACA).Methods:An explanatory sequential mixed methods research was used.A quantitative survey was followed up by a qualitative study.A convenience sample of participants(n=4)was recruited.The research was conducted on a one-on-one basis.In the quantitative phase,a random assignment technique was used to divide four participants into two groups of two participants each.Post-Study System Usability Questionnaire(PSSUQ)and Acceptability e-Scale were used to collect quantitative data.In the qualitative phase,interview,observation,and documentation were used to collect qualitative data.Data were analyzed both quantitative and qualitatively.The qualitative data were linked with the initial quantitative data to determine how the follow-up qualitative data helped explain the initial quantitative results.Results:The quantitative results suggested that SACA has high usability(5.05±1.83)and acceptability(3.81±1.22).The qualitative results further indicate that the participants thought SACA was easy to use and useful,and most of them would recommend it to others.Areas of improvement include adding features that would calculate and validate the elapsed time since the sexual assault,adding explanations to some buttons,and providing training.Conclusions:Our findings highlight the value of using a mixed methods research design to conduct a usability and acceptability test.Nurses are more likely to adopt a new technology for their evidencebased practice when the technology is easy to use and useful and requires less time to find the right piece of guideline evidence.Individualized training needs to be designed based on users'characteristics. 展开更多
关键词 ACCEPTABILITY Child sexual assault Clinical guideline mixed methods research design Mobile application technology USABILITY
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A first attempt of inferior vena cava filter successfully guided by a mixed-reality system: a case report 被引量:6
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作者 Hang ZHU Yao LI +8 位作者 Chi WANG Qiu-Yang LI Zheng-Yang XU Xin LI Abudureyimu Abudulitipujiang Ji-Xing PAN Er-Long FAN Jun GUO Yun-Dai CHEN 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2019年第7期575-577,共3页
Pulmonary embolism(PE)is one of the fatal heart attacks,and lower limbs deep vein thrombosis(DVT)is the most common reason for PE.Inferior vena cava filter(IVCF)implantation is a most prevention for PE.But it may carr... Pulmonary embolism(PE)is one of the fatal heart attacks,and lower limbs deep vein thrombosis(DVT)is the most common reason for PE.Inferior vena cava filter(IVCF)implantation is a most prevention for PE.But it may carry a high risk of injury because of the radiation and contrast agent.Patients with nephrotic syndrome(NS)or some other renal diseases may prone to thrombosis due to the excretion of protein C and protein S overmuch.So,it is necessary to develop a new therapy without contrast agent.Mixed-reality(MR)is a new technology as a guidance of inferior vena cava filter implantation exposed under no X-ray and required no contrast agent. 展开更多
关键词 INFERIOR vena cava filter mixed-reality technology PULMONARY EMBOLISM
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基于PMC mix drive的铝合金自由成形单面焊工艺研究
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作者 郑杰 杜学铭 《热加工工艺》 北大核心 2020年第21期34-38,共5页
使用最新的Fronius TPS 400i焊机,采用PMC mix drive焊接技术和ER5183焊丝对5 mm厚5A06铝合金进行堆焊试验,研究了该焊接技术特有的三个工艺参数:PMC mix高电流时间修正、低能量周期、低能量调节对焊缝成形的影响;同时对5 mm厚5A06铝合... 使用最新的Fronius TPS 400i焊机,采用PMC mix drive焊接技术和ER5183焊丝对5 mm厚5A06铝合金进行堆焊试验,研究了该焊接技术特有的三个工艺参数:PMC mix高电流时间修正、低能量周期、低能量调节对焊缝成形的影响;同时对5 mm厚5A06铝合金进行了自由成形单面焊工艺探索。试验发现送丝速度9.6 m·min-1,焊接速度56 cm·min-1,PMC mix高电流时间修正为3,低能量周期调节为7,低能量调节为0时,可以获得正反面无缺陷、成形优良的焊缝。 展开更多
关键词 PMC mix drive焊接技术 5A06铝合金 自由成形单面焊 正交试验
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混合现实技术在椎体成形治疗中的应用 被引量:1
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作者 姜泳 关天民 +5 位作者 慈元 朱晔 赵鹏 郑家法 杨涛 张光宇 《中国组织工程研究》 CAS 北大核心 2024年第30期4812-4816,共5页
背景:如何提高椎体成形术中穿刺的精准性、减少手术损伤、提高手术效率是目前椎体成形治疗技术探索和改进的焦点之一。目的:探讨混合现实临床设计方案在脊柱骨折经皮椎体成形过程中应用的临床意义。方法:选择2023年6月大连市第二人民医... 背景:如何提高椎体成形术中穿刺的精准性、减少手术损伤、提高手术效率是目前椎体成形治疗技术探索和改进的焦点之一。目的:探讨混合现实临床设计方案在脊柱骨折经皮椎体成形过程中应用的临床意义。方法:选择2023年6月大连市第二人民医院收治的2例脊柱骨质疏松性腰椎椎体压缩骨折患者,患者术前行腰椎128排CT扫描并获得医学数字成像和通信原始数据,Visual Volume软件构建脊柱压缩性骨折三维网络模型。运用全息影像眼镜将三维网络模型影像精确映射于真实世界,协助术者完成术前模拟、术前病情及治疗方案阐述,以及术中引导穿刺及骨水泥注射。结果与结论:①在混合现实临床设计方案辅助下可实现经皮椎体成形治疗的精准穿刺,术后影像学检查示骨水泥充填良好、无明显渗漏,术后患者症状缓解良好,术后当天即可下地活动;②提示混合现实临床设计方案有助于术者术前进行完善的手术设计、提高与患者及家属的沟通效率;术中协助精准穿刺、缩短手术时间、减少副损伤,是一种新的有效的临床诊疗模式,在脊柱外科微创化、精准化、个性化的治疗中具有发展潜力。 展开更多
关键词 混合现实技术 椎体成形 精确医学 虚拟现实 骨水泥注射
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Practice and Exploration of Mixed Teaching of Microelectronics
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作者 Jianqiao Liu Zhaoxia Zhai +5 位作者 Haichao Wei Yang Wang Guohua Jin Ce Fu Xinnian Wang Sheng Bi 《Journal of Electronic Research and Application》 2022年第5期15-18,共4页
The mixed teaching mode plays an increasingly important role in stimulating students’interest and autonomy in learning,and strengthening students’learning ability.The full integration of mixed teaching mode and micr... The mixed teaching mode plays an increasingly important role in stimulating students’interest and autonomy in learning,and strengthening students’learning ability.The full integration of mixed teaching mode and microelectronics teaching can not only achieve the teaching objectives smoothly,but also enable students to deepen their understanding and memory of relevant knowledge with the help of diversified and interesting teaching methods.Therefore,this paper takes the microelectronics course as an example to practice and explore the effective ways to carry out the mixed teaching mode.Teachers should not make full use of online and offline teaching resources,but also actively improve the traditional assessment systems.Through the continuous improvement of the practicality of online and offline teaching content,an easy-to-complex teaching method with a coherent content structure can be adopted to stimulate students’learning motivation,improve their enthusiasm for participation,and lay a solid foundation for further improvements in the teaching of microelectronics technology. 展开更多
关键词 Microelectronic technology mixed teaching Learning needs Learning enthusiasm Learning motivation
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H_∞-Mixed Sensitivity Design of Roll Channel of Bank-to-Turn Autopilot for Small Diameter Bomb
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作者 孙瑞胜 薛晓中 +1 位作者 胥加成 沈坚平 《Defence Technology(防务技术)》 SCIE EI CAS 2010年第1期35-38,共4页
According to requirements of the bank-to-turn (BTT) control for a small diameter bomb (SDB), the robust design problem for the roll autopilot was studied by H∞-mixed sensitivity control method. A roll channel dynamic... According to requirements of the bank-to-turn (BTT) control for a small diameter bomb (SDB), the robust design problem for the roll autopilot was studied by H∞-mixed sensitivity control method. A roll channel dynamics model was established. Considering the couple between the yaw and roll channel as uncertain disturbance, the roll autopilot was designed using dual-loop scheme which takes a linear quadratic regulator (LQR) as inner-loop, to ensure the control effect of the certain part in model, and an H∞-mixed sensitivity control as outer-loop, to restrain coupling disturbance and strengthen the system's robust performance. The dynamic tracking performance and the robustness for the parameter disturbance of the roll controller were analyzed. The simulated results show that the roll control system functions better and robustly. 展开更多
关键词 control and navigation technology of aerocraft AUTOPILOT SDB H∞-mixed sensitivity dual-loop control
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