Now computer terminals, communication control, and network technology continues rapidly developed, the rapidly expanding range of information exchange, has been covering the field device to the control and management ...Now computer terminals, communication control, and network technology continues rapidly developed, the rapidly expanding range of information exchange, has been covering the field device to the control and management at all levels of networking, industrial control monitoring is not only limited to on-site monitoring, on-site scheduling. The development of industrial monitoring control system is a history of development of centralized monitoring and control to the network monitoring control. The previous system, the various important instruments＇ status were monitored by the large-scale instruments.展开更多
In order to achieve remote control problems for the intelligent home appliances, The paper presents a realization method through the Internet and GSM remote to control appliances of smart home, and given circuit. And ...In order to achieve remote control problems for the intelligent home appliances, The paper presents a realization method through the Internet and GSM remote to control appliances of smart home, and given circuit. And described in detail the hardware and software design of smart home appliances and their control method. Test results show that the system is stable and reliable.展开更多
We demonstrate a bidirectional WDM self-healing ring network for hub/remote nodes with one fiber. In this network, self-healing can be achieved within 8 ms. The transmission capacity can be doubled in the operating st...We demonstrate a bidirectional WDM self-healing ring network for hub/remote nodes with one fiber. In this network, self-healing can be achieved within 8 ms. The transmission capacity can be doubled in the operating state.展开更多
This paper introduces the high-speed electrical multiple unit （EMO） life cycle, including the design, manufacturing, testing, and maintenance stages. It also presents the train control and monitoring system （TCMS）...This paper introduces the high-speed electrical multiple unit （EMO） life cycle, including the design, manufacturing, testing, and maintenance stages. It also presents the train control and monitoring system （TCMS） software development platform, the TCMS testing and verification bench, the EMU driving simulation platform, and the EMU remote data transmittal and maintenance platform. All these platforms and benches combined together make up the EMU life cycle cost （LCC） system. Each platform facilitates EMU LCC management and is an important part of the system.展开更多
Given the limited ground infrastructure in remote areas such as suburbs and rural regions,Internet of Remote Things(IoRT)devices have been widely deployed to gather critical data and information.However,traditional da...Given the limited ground infrastructure in remote areas such as suburbs and rural regions,Internet of Remote Things(IoRT)devices have been widely deployed to gather critical data and information.However,traditional data transmission methods struggle to directly transmit the data to data processing centers.This paper proposes a space–air–ground Internet of Remote Things(SAG-IoRT)network architecture,which leverages the extensive coverage and efficient communication capabilities of satellites as its core advantage.In the SAG-IoRT network,low Earth orbit(LEO)satellites play a crucial role,addressing communication challenges in remote areas through their global coverage.Unmanned aerial vehicles(UAVs)serve as flexible bridges between ground and space,rapidly transmitting data collected by IoRT devices to LEO satellites,thereby enhancing data transmission efficiency and reliability.Our research focuses on optimizing the flight trajectories and scheduling strategies of UAVs to maximize the utilization of satellite communication resources,aiming to boost system throughput and reduce UAV energy consumption.To tackle the challenges of data collection and transmission in the dynamic and uncertain SAG-IoRT network environment,we formulate the optimization problem as a Markov decision process and apply the multi-agent deep deterministic policy gradient(MADDPG)algorithm to plan optimal paths for UAVs.Experimental results show that compared to the single-agent DDPG algorithm,the MADDPG-based solution not only improves system throughput by approximately 25.6%but also reduces UAV energy consumption by around 24.9%.This achievement underscores the pivotal role of satellites in advancing the development of IoRT and enabling efficient space-based communications.展开更多
文摘Now computer terminals, communication control, and network technology continues rapidly developed, the rapidly expanding range of information exchange, has been covering the field device to the control and management at all levels of networking, industrial control monitoring is not only limited to on-site monitoring, on-site scheduling. The development of industrial monitoring control system is a history of development of centralized monitoring and control to the network monitoring control. The previous system, the various important instruments＇ status were monitored by the large-scale instruments.
文摘In order to achieve remote control problems for the intelligent home appliances, The paper presents a realization method through the Internet and GSM remote to control appliances of smart home, and given circuit. And described in detail the hardware and software design of smart home appliances and their control method. Test results show that the system is stable and reliable.
文摘We demonstrate a bidirectional WDM self-healing ring network for hub/remote nodes with one fiber. In this network, self-healing can be achieved within 8 ms. The transmission capacity can be doubled in the operating state.
文摘This paper introduces the high-speed electrical multiple unit （EMO） life cycle, including the design, manufacturing, testing, and maintenance stages. It also presents the train control and monitoring system （TCMS） software development platform, the TCMS testing and verification bench, the EMU driving simulation platform, and the EMU remote data transmittal and maintenance platform. All these platforms and benches combined together make up the EMU life cycle cost （LCC） system. Each platform facilitates EMU LCC management and is an important part of the system.
基金supported in part by the National Key Research and Development Program of China under Grant No.2020YFB1807700。
文摘Given the limited ground infrastructure in remote areas such as suburbs and rural regions,Internet of Remote Things(IoRT)devices have been widely deployed to gather critical data and information.However,traditional data transmission methods struggle to directly transmit the data to data processing centers.This paper proposes a space–air–ground Internet of Remote Things(SAG-IoRT)network architecture,which leverages the extensive coverage and efficient communication capabilities of satellites as its core advantage.In the SAG-IoRT network,low Earth orbit(LEO)satellites play a crucial role,addressing communication challenges in remote areas through their global coverage.Unmanned aerial vehicles(UAVs)serve as flexible bridges between ground and space,rapidly transmitting data collected by IoRT devices to LEO satellites,thereby enhancing data transmission efficiency and reliability.Our research focuses on optimizing the flight trajectories and scheduling strategies of UAVs to maximize the utilization of satellite communication resources,aiming to boost system throughput and reduce UAV energy consumption.To tackle the challenges of data collection and transmission in the dynamic and uncertain SAG-IoRT network environment,we formulate the optimization problem as a Markov decision process and apply the multi-agent deep deterministic policy gradient(MADDPG)algorithm to plan optimal paths for UAVs.Experimental results show that compared to the single-agent DDPG algorithm,the MADDPG-based solution not only improves system throughput by approximately 25.6%but also reduces UAV energy consumption by around 24.9%.This achievement underscores the pivotal role of satellites in advancing the development of IoRT and enabling efficient space-based communications.
