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Research on Mobile Internet Mobile Agent System Dynamic Trust Model for Cloud Computing 预览
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作者 Weijin Jiang Yang Wang +3 位作者 Yirong Jiang Jiahui Chen Yuhui Xu Lina Tan 《中国通信:英文版》 SCIE CSCD 2019年第7期174-194,共21页
This paper analyzes the reasons for the formation of security problems in mobile agent systems, and analyzes and compares the security mechanisms and security technologies of existing mobile agent systems from the per... This paper analyzes the reasons for the formation of security problems in mobile agent systems, and analyzes and compares the security mechanisms and security technologies of existing mobile agent systems from the perspective of blocking attacks. On this basis, the host protection mobile agent protection technology is selected, and a method to enhance the security protection of mobile agents (referred to as IEOP method) is proposed. The method first encrypts the mobile agent code using the encryption function, and then encapsulates the encrypted mobile agent with the improved EOP protocol IEOP, and then traces the suspicious execution result. Experiments show that using this method can block most malicious attacks on mobile agents, and can protect the integrity and confidentiality of mobile agents, but the increment of mobile agent tour time is not large. 展开更多
关键词 MOBILE internet CLOUD COMPUTING MOBILE agent system SUBJECTIVE TRUST dynamic TRUST management
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On Cost Aware Cloudlet Placement for Mobile Edge Computing 预览
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作者 Qiang Fan Nirwan Ansari 《自动化学报:英文版》 CSCD 2019年第4期926-937,共12页
As accessing computing resources from the remote cloud inherently incurs high end-to-end(E2E)delay for mobile users,cloudlets,which are deployed at the edge of a network,can potentially mitigate this problem.Although ... As accessing computing resources from the remote cloud inherently incurs high end-to-end(E2E)delay for mobile users,cloudlets,which are deployed at the edge of a network,can potentially mitigate this problem.Although some research works focus on allocating workloads among cloudlets,the cloudlet placement aiming to minimize the deployment cost(i.e.,consisting of both the cloudlet cost and average E2E delay cost)has not been addressed effectively so far.The locations and number of cloudlets have a crucial impact on both the cloudlet cost in the network and average E2E delay of users.Therefore,in this paper,we propose the Cost Aware cloudlet PlAcement in moBiLe Edge computing(CAPABLE)strategy,where both the cloudlet cost and average E2E delay are considered in the cloudlet placement.To solve this problem,a Lagrangian heuristic algorithm is developed to achieve the suboptimal solution.After cloudlets are placed in the network,we also design a workload allocation scheme to minimize the E2E delay between users and their cloudlets by considering the user mobility.The performance of CAPABLE has been validated by extensive simulations. 展开更多
关键词 CLOUDLET PLACEMENT MOBILE cloud COMPUTING MOBILE EDGE COMPUTING
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Research Proposal:A Study of the Effect of Mobile Dictionary Use on English Learning:Focusing on the Students in Vocational School in Rural Area 预览
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作者 冯翠平 《海外英语》 2019年第3期246-248,252共4页
Mobile devices are effective tools for language learning and have positive effect on the development of language skills,heighten learners’language learning attitudes and motivation,and support learner interaction,col... Mobile devices are effective tools for language learning and have positive effect on the development of language skills,heighten learners’language learning attitudes and motivation,and support learner interaction,collaboration,and the coconstruction of knowledge.In spite of the popularity of mobile dictionaries among students,research on the effect of this app on students’language learning,especially focusing on the students from vocational school in rural area,is still scarce.So the purpose of the current study is probing into the effect of using mobile dictionaries on lower-intermediate students’language learning,focusing on the students from vocational school in rural areas,in contrast to using printed dictionaries.This proposal is arranged as follows:section one presents the research background;section two reviews literatures;section three provides research problems and research design;section four presents data analysis and anticipated results.This proposal ends with conclusions.In term of research aims,a mixed method of quantitative and qualitative will be applied with the main aim of probing the effect of using mobile dictionaries on students’English learning and the opinions of students’on using the mobile dictionaries in English learning.Research methods in the form of quasi-experimental pre-and post-tests,questionnaires,interview will be undertaken to collect data. 展开更多
关键词 MOBILE DICTIONARY use English learning VOCATIONAL school in rural area
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矿用大型设备移动式预热车 预览
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作者 韩建民 栗飞 《露天采矿技术》 CAS 2019年第4期99-102,共4页
在对露天煤矿故障设备进行低温启动时,由于停机设备存在时间以及空间的不确定性,再加上发动机严禁冷启动以及乙醚辅助启动。综合各种因素成功设计了一种新型的移动式预热车,冬季能够便捷、高效的给矿用内燃设备发动机进行低温预热启动,... 在对露天煤矿故障设备进行低温启动时,由于停机设备存在时间以及空间的不确定性,再加上发动机严禁冷启动以及乙醚辅助启动。综合各种因素成功设计了一种新型的移动式预热车,冬季能够便捷、高效的给矿用内燃设备发动机进行低温预热启动,避免发动机的冷启动,确保发动机及设备的使用寿命,提高设备的出动率,保证正常生产。 展开更多
关键词 移动式 预热车 空气加热器 柴油机 冷启动
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Optimal control of a mobile robot on sphere 预览
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作者 Huageng Liu Donghua Shi 《力学快报:英文版》 CAS CSCD 2019年第1期27-31,I0006共6页
For the purpose of solving optimal control problem of a wall-crawling mobile robot working on spherical containers, we propose the Hamel's formalism for Pontryagin Maximum Principle, which gives a general framewor... For the purpose of solving optimal control problem of a wall-crawling mobile robot working on spherical containers, we propose the Hamel's formalism for Pontryagin Maximum Principle, which gives a general framework for the optimal control of a mechanical system with velocity constraints, especially nonholonomic constraints. The effectiveness of the proposed framework is shown by the simulations for the above problem. 展开更多
关键词 Hamel's FORMALISM Optimal control Pontryagin MAXIMUM PRINCIPLE Mobile robot
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Improving cirrhosis care: The potential for telemedicine and mobile health technologies 预览
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作者 Matthew Jonathon Stotts Justin Alexander Grischkan Vandana Khungar 《世界胃肠病学杂志:英文版》 SCIE CAS 2019年第29期3849-3856,共8页
Decompensated cirrhosis is a condition associated with significant morbidity and mortality. While there have been significant efforts to develop quality metrics that ensure high-value care of these patients, wide vari... Decompensated cirrhosis is a condition associated with significant morbidity and mortality. While there have been significant efforts to develop quality metrics that ensure high-value care of these patients, wide variations in clinical practice exist. In this opinion review, we discuss the quality gap in the care of patients with cirrhosis, including low levels of compliance with recommended cancer screening and other clinical outcome and patient-reported outcome measures. We posit that innovations in telemedicine and mobile health (mHealth) should play a key role in closing the quality gaps in liver disease management. We highlight interventions that have been performed to date in liver disease and heart failurefrom successful teleconsultation interventions in the care of veterans with cirrhosis to the use of telemonitoring to reduce hospital readmissions and decrease mortality rates in heart failure. Telemedicine and mHealth can effectively address unmet needs in the care of patients with cirrhosis by increasing preventative care, expanding outreach to rural communities, and increasing high-value care. We aim to highlight the benefits of investing in innovative solutions in telemedicine and mHealth to improve care for patients with cirrhosis and create downstream cost savings. 展开更多
关键词 CIRRHOSIS Liver disease Quality improvement TELEMEDICINE TELEMONITORING Mobile HEALTH
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An Energy Efficient Design for UAV Communication With Mobile Edge Computing 预览
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作者 Lingyan Fan Wu Yan +2 位作者 Xihan Chen Zhiyong Chen Qingjiang Shi 《中国通信:英文版》 SCIE CSCD 2019年第1期26-36,共11页
This paper considers a UAV communication system with mobile edge computing(MEC).We minimize the energy consumption of the whole system via jointly optimizing the UAV’s trajectory and task assignment as well as CPU’s... This paper considers a UAV communication system with mobile edge computing(MEC).We minimize the energy consumption of the whole system via jointly optimizing the UAV’s trajectory and task assignment as well as CPU’s computational speed under the set of resource constrains.To this end,we first derive the energy consumption model of data processing,and then obtain the energy consumption model of fixed-wing UAV’s flight.The optimization problem is mathematically formulated.To address the problem,we first obtain the approximate optimization problem by applying the technique of discrete linear state-space approximation,and then transform the non-convex constraints into convex by using linearization.Furthermore,a concave-convex procedure(CCCP)based algorithm is proposed in order to solve the optimization problem approximately.Numerical results show the efficacy of the proposed algorithm. 展开更多
关键词 MOBILE EDGE computing(MEC) UAV COMMUNICATION concave-convex procedure(CCCP) energy minimization
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Smart Rehabilitation Solutions Through IoT and Mobile Devices 预览
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作者 Raúl Morales Salcedo Milton Carlos Elías Espinosa 《管理研究:英文版》 2019年第2期106-112,共7页
Hand injuries are a frequent problem in actual society.These are often caused while working or exercising,but simple everyday activities can also be the cause.The most common injuries are those related to soft tissue;... Hand injuries are a frequent problem in actual society.These are often caused while working or exercising,but simple everyday activities can also be the cause.The most common injuries are those related to soft tissue;specifically,muscles,tendons,and ligaments.To improve therapy results and reduce its cost and needed time,a self-rehabilitation system for soft tissue injuries in the hands was developed.The proposed system is meant to be implemented on Smart TVs and can be used in the home of the injured people.To identify the most common movements of the injured limbs,and design proper therapies to be displayed by the system,an exoskeleton prototype which supports four degrees of freedom of the hand was constructed.We examined scenarios to provide services for individuals and created a scenario-based prototype,which was tested by an exercise therapist to verify compliance with the requirements of users. 展开更多
关键词 rehabilitation-training SYSTEM MECHATRONICS SMART TV SYSTEM mobile REHABILITATION
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App-and-Coming--Mobile applications become banks'new golden goose
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作者 Vera Zhang 《北京周报:英文版》 2019年第28期36-37,共2页
Checkbooks can be called the dinosaurs of banking. Once essential for transactions, especially those involving large sums of money, they became virtually extinct with the arrival of ATM cards. Now, as technology conti... Checkbooks can be called the dinosaurs of banking. Once essential for transactions, especially those involving large sums of money, they became virtually extinct with the arrival of ATM cards. Now, as technology continues to evolve, it could be time to say goodbye to the handy little bankcards as well. 展开更多
关键词 Checkbooks MOBILE applications GOLDEN GOOSE
Coverage-optimization based guidance of mobile agents for improved control of distributed parameter systems 预览
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作者 ZHUANG Bo CUI Baotong +1 位作者 WU Wei JIANG Zhengxian 《系统工程与电子技术:英文版》 SCIE EI CSCD 2019年第3期601-612,共12页
The control problem of a class of parabolic distributed parameter systems (DPSs) is investigated by using mobile agents with capabilities of sensing and actuating. The guidance strategies of mobile agents based on cov... The control problem of a class of parabolic distributed parameter systems (DPSs) is investigated by using mobile agents with capabilities of sensing and actuating. The guidance strategies of mobile agents based on coverage optimization methods are proposed to improve the control performance of the system and make the state norm of the system converge to zero faster. The coverage optimization problems are constructed based on the measurement of each agent. By solving the coverage optimization problems, the local optimal moving direction of each agent can be obtained. Then the gradient-based agent motion control laws are established. With the indicator function and the surface delta function, this method is generalized to n-dimensional space, and suitable for any sensing region with piecewise smooth boundaries. The stability and control performance of the system are analyzed. Numerical simulations show the effectiveness of the proposed methods. 展开更多
关键词 distributed PARAMETER systems (DPSs) mobile AGENTS COVERAGE OPTIMIZATION INDICATOR function
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A Mobile App to Replace the Goniometer? A Pilot Study Focusing on the Measurement of Knee Range of Movement 预览
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作者 Sara Aspinall Tim Sparks +2 位作者 Andrew King Mike Price Steven Godsiff 《运动科学:英文版》 2019年第3期71-80,共10页
Background: The universal goniometer is commonly used to measure knee range of movement in clinical practice. However, research has demonstrated that the universal goniometer lacks reliability failing to meet the stan... Background: The universal goniometer is commonly used to measure knee range of movement in clinical practice. However, research has demonstrated that the universal goniometer lacks reliability failing to meet the standard of clinically acceptable error (5°). Objective: This study tested the concurrent validity and intra-rater reliability of a photographic based “app” developed for feedback in sport, the Hudl Ubersense App, as an alternative instrument for measuring knee range of movement. Methods: Measurements of knee range of movement were made concurrently with the electrogoniometer (the gold standard) and the Hudl Ubersense App across a pre-determined randomised set of 20 functional knee angles between 35° and 130°. This was then repeated. The pre-agreed standard of concurrent validity was that 95% of Hudl Ubersense App measurements would be within 5° of the electrogoniometer and differences were displayed in Bland-Altman plots. Results: Thirty nine (97%) of the forty app readings differed from the corresponding electrogoniometer readings by less than 5°. The mean differences between the electrogoniometer and Hudl Ubersense App measurements over each trial were 1.75° and 0.80° respectively, indicating a high level of concurrent validity. There was less than 1.0° mean difference between the first and second set of results indicating a high level of intra-rater reliability. Conclusions: The results suggest that the Hudl Ubersense App has high levels of concurrent validity (using the electrogoniometer as the gold standard) and intra-rater reliability, scoring better than previous research on the current clinical measuring device, the universal goniometer. The Hudl Ubersense App has clinical advantages over the electrogoniometer, so further research is recommended to determine its inter-rater reliability, acceptability, and appropriate clinical practice procedures. 展开更多
关键词 MOBILE application range of movement KNEE CONCURRENT validity intra-rater reliability.
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An adaptive offloading framework for Android applications in mobile edge computing
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作者 Xing CHEN Shihong CHEN +3 位作者 Yun MA Bichun LIU Ying ZHANG Gang HUANG 《中国科学:信息科学(英文版)》 SCIE EI CSCD 2019年第8期110-126,共17页
Mobile edge computing(MEC) provides a fresh opportunity to significantly reduce the latency and battery energy consumption of mobile applications. It does so by enabling the offloading of parts of the applications on ... Mobile edge computing(MEC) provides a fresh opportunity to significantly reduce the latency and battery energy consumption of mobile applications. It does so by enabling the offloading of parts of the applications on mobile edges, which are located in close proximity to the mobile devices. Owing to the geographical distribution of mobile edges and the mobility of mobile devices, the runtime environment of MEC is highly complex and dynamic. As a result, it is challenging for application developers to support computation offloading in MEC compared with the traditional approach in mobile cloud computing, where applications use only the cloud for offloading. On the one hand, developers have to make the offloading adaptive to the changing environment, where the offloading should dynamically occur among available computation nodes.On the other hand, developers have to effectively determine the offloading scheme each time the environment changes. To address these challenges, this paper proposes an adaptive framework that supports mobile applications with offloading capabilities in MEC. First, based on our previous study(DPartner), a new design pattern is proposed to enable an application to be dynamically offloaded among mobile devices, mobile edges,and the cloud. Second, an estimation model is designed to automatically determine the offloading scheme.In this model, different parts of the application may be executed on different computation nodes. Finally, an adaptive offloading framework is implemented to support the design pattern and the estimation model. We evaluate our framework on two real-world applications. The results demonstrate that our approach can aid in reducing the response time by 8%–50% and energy consumption by 9%–51% for computation-intensive applications. 展开更多
关键词 computation OFFLOADING software adaptation MOBILE EDGE COMPUTING application REFACTORING ANDROID
Neural Network-Based Adaptive Motion Control for a Mobile Robot with Unknown Longitudinal Slipping
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作者 Gang Wang Xiaoping Liu +1 位作者 Yunlong Zhao Song Han 《中国机械工程学报:英文版》 SCIE EI CAS CSCD 2019年第4期26-34,共9页
When the mobile robot performs certain motion tasks in complex environment, wheel slipping inevitably occurs due to the wet or icy road and other reasons, thus directly influences the motion control accuracy. To addre... When the mobile robot performs certain motion tasks in complex environment, wheel slipping inevitably occurs due to the wet or icy road and other reasons, thus directly influences the motion control accuracy. To address unknown wheel longitudinal slipping problem for mobile robot, a RBF neural network approach based on whole model approximation is presented. The real-time data acquisition of inertial measure unit(IMU), encoders and other sensors is employed to get the mobile robot’s position and orientation in the movement, which is applied to compensate the unknown bounds of the longitudinal slipping using the adaptive technique. Both the simulation and experimental results prove that the control scheme possesses good practical performance and realize the motion control with unknown longitudinal slipping. 展开更多
关键词 Mobile robot Longitudinal slipping RBF neural network ADAPTIVE control
Conflict and Emergency Management in a Post-Liberal World 预览
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作者 Peter Simon Sapaty 《国际关系与外交:英文版》 2019年第1期14-36,共23页
The world is steadily moving to the post-liberal order with the urgent need of novel organizational and security approaches,also new levels of international cooperation,in order to support its stability and prosperity... The world is steadily moving to the post-liberal order with the urgent need of novel organizational and security approaches,also new levels of international cooperation,in order to support its stability and prosperity.The developed high-level Spatial Grasp Technology(SGT)and its Spatial Grasp Language(SGL)are briefed which may be particularly useful for solving numerous conflicts and crises problems emerging in different areas during this transitional period,in both local and global scale.SGT employs unlimited spatial scenario mobility and parallel holistic matching of distributed systems,with numerous communicating SGL interpreters potentially installed worldwide.Basic network creation and management operations are described in SGL which may operate on top of existing communication systems or serve individually as high level network protocols in case of non-local crises and disasters.Different operations on social networks are presented in SGL including finding strongest and weakest components with resultant changing of network topologies,also determining distances between different communities for preventing and predicting social conflicts.Fully distributed analysis,and tracing and simulation of multiple mobile objects in distributed spaces with complex routes are shown in SGL related to cruise missiles,defence objects and debris in outer space,as well as massively moving refugees through international borders.The proposed technology had trial implementations and applications in different countries,and its latest version can be readily installed by agreement on any platforms needed. 展开更多
关键词 post-liberal world international cooperation crises and emergency management HIGH-LEVEL NETWORKING technology social dynamics and conflicts distributed TRACING of mobile objects global spatial solutions
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互联网+环境下基于Mobile Terminal的大学英语复合式听说教学模式研究 预览
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作者 陈红 《智库时代》 2019年第3期158-158,160共2页
本研究提出了一种基于Mobile terminal的复合式听说教学模式,为英语学习者能够在移动中学习英语相关的文化知识和锻炼听说技能提供了真实、生动、高效的学习环境。从深远意义上讲,移动学习是未来学习的趋势,它必将为促进教育的规模化和... 本研究提出了一种基于Mobile terminal的复合式听说教学模式,为英语学习者能够在移动中学习英语相关的文化知识和锻炼听说技能提供了真实、生动、高效的学习环境。从深远意义上讲,移动学习是未来学习的趋势,它必将为促进教育的规模化和多样化作出贡献。 展开更多
关键词 互联网+ MOBILE TERMINAL 复合式 教学模式
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从弱者走向强者 后进入移动通信市场的国外运营商策略思考
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作者 陈昕 《通信企业管理》 2019年第9期60-65,共6页
随着经济全球化,部分国家电信市场逐步开放,很多国家的移动通信市场都引入了新的运营商,并期望这些后进入市场者能带来行业发展的活力,进而促进当地移动通信业的发展。与此同时,在移动通信技术发展升级过程中,后采用新一代技术进入市场... 随着经济全球化,部分国家电信市场逐步开放,很多国家的移动通信市场都引入了新的运营商,并期望这些后进入市场者能带来行业发展的活力,进而促进当地移动通信业的发展。与此同时,在移动通信技术发展升级过程中,后采用新一代技术进入市场的运营商也可能走出自己独特的发展之路。 展开更多
关键词 移动通信市场 Mobile USA 客服热线 后进入者 策略思考
移动智能医疗系统的现状与挑战 预览
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作者 章靓 黄钰莹 +1 位作者 郭晓芳 邱水生 《海峡药学》 2019年第3期283-285,共3页
随着智能手机的普及,移动技术得到飞速的发展,移动医疗由此受益,逐步从简单的信息展示向成熟复杂的业务模式转型,逐渐专注于细分领域,更加偏重于医疗的准确性和专业性。伴随着临床药学的发展和药学监护工作的展开,移动医疗在药学领域的... 随着智能手机的普及,移动技术得到飞速的发展,移动医疗由此受益,逐步从简单的信息展示向成熟复杂的业务模式转型,逐渐专注于细分领域,更加偏重于医疗的准确性和专业性。伴随着临床药学的发展和药学监护工作的展开,移动医疗在药学领域的发展日趋深入,便捷精准的药物治疗越来越受到人们的重视。 展开更多
关键词 智能医疗 APP 移动 现状 挑战
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Adaptive network fuzzy inference system based navigation controller for mobile robotAdaptive network fuzzy inference system based navigation controller for mobile robot
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作者 Panati SUBBASH Kil To CHONG 《信息与电子工程前沿:英文版》 SCIE EI CSCD 2019年第2期141-151,共11页
Autonomous navigation of a mobile robot in an unknown environment with highly cluttered obstacles is a fundamental issue in mobile robotics research. We propose an adaptive network fuzzy inference system(ANFIS) based ... Autonomous navigation of a mobile robot in an unknown environment with highly cluttered obstacles is a fundamental issue in mobile robotics research. We propose an adaptive network fuzzy inference system(ANFIS) based navigation controller for a differential drive mobile robot in an unknown environment with cluttered obstacles. Ultrasonic sensors are used to capture the environmental information around the mobile robot. A training data set required to train the ANFIS controller has been obtained by designing a fuzzy logic based navigation controller. Additive white Gaussian noise has been added to the sensor readings and fed to the trained ANFIS controller during mobile robot navigation, to account for the effect of environmental noise on sensor readings. The robustness of the proposed navigation controller has been evaluated by navigating the mobile robot in three different environments. The performance of the proposed controller has been verified by comparing the travelled path length/efficiency and bending energy obtained by the proposed method with reference mobile robot navigation controllers, such as neural network, fuzzy logic, and ANFIS. Simulation results presented in this paper show that the proposed controller has better performance compared with reference controllers and can successfully navigate in different environments without any collision with obstacles. 展开更多
关键词 Adaptive network fuzzy INFERENCE system ADDITIVE white GAUSSIAN noise AUTONOMOUS navigation Mobile robot
A Real Time Self-Tuning Motion Controller for Mobile Robot Systems 预览
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作者 Mohamed Boukens Abdelkrim Boukabou Mohammed Chadli 《自动化学报:英文版》 CSCD 2019年第1期84-96,共13页
This paper proposes an intelligent controller for motion control of robotic systems to obtain high precision tracking without the need for a real-time trial and error method.In addition, a new self-tuning algorithm ha... This paper proposes an intelligent controller for motion control of robotic systems to obtain high precision tracking without the need for a real-time trial and error method.In addition, a new self-tuning algorithm has been developed based on both the ant colony algorithm and a fuzzy system for real-time tuning of controller parameters. Simulations and experiments using a real robot have been addressed to demonstrate the success of the proposed controller and validate the theoretical analysis. Obtained results confirm that the proposed controller ensures robust performance in the presence of disturbances and parametric uncertainties without the need for adjustment of control law parameters by a trial and error method. 展开更多
关键词 Learning and adaptive SYSTEMS motion CONTROL METAHEURISTIC robust CONTROL real-time tuning SELF-TUNING WHEELED mobile robot
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一种移动式升降装置的设计及应用 预览
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作者 刘松 《机电产品开发与创新》 2019年第3期19-21,共3页
根据企业生产过程中遇到的实际问题,设计了一种移动式升降装置,可实现插桶泵自动升降的功能,具有自动化程度高、劳动强度低、人工成本低、生产风险低、适用性强等特点。
关键词 插桶泵 移动式 气压传动 自动化 洁净车间 GMP
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