Mobile-edge computing (MEC) has been a promising solution for Internet-of-Things (IoT) applications to obtain latency reduction and energy savings. In view of the loosely coupled application, multiple devices can use same task code different input parameters diverse results. This motivates us study cooperation between eliminating repeated data transmission. Leveraging coalitional game theory, we formalize cooperative offloading process reusable into maximize cost particular, first propose an...

In the shipping industry, people are paying more attention on emission issue of ships. A shore to ship power solution is attractive for port authorities and owners as it helps reduce emissions in ports by connecting ships electricity grid turn off their diesel engines while at berth improve air quality, noise vibrations areas. Besides, there also economical benefits costs related fossil fuel consumption increase. Because most operate with 60 Hz whereas local parts world 50 Hz, shore-to-ship...

Applications consisting of a group modular tasks can be offloaded to the multiaccess edge computing (MEC) for lower delay and energy consumption. In dynamic MEC system, fine-grained cooperative offloading solution is necessary scenario reusing among devices. Considering transmission cooperation, shared wireless bandwidth, changing task queues on devices servers, we formulate joint optimization problem minimize long-term average execution cost. Although deep reinforcement learning (DRL)...

With the promotion of cloud computing, a large number hardware and software systems in bring massive complex operation maintenance (O&M) work. To ensure O&M efficiency IT infrastructures, it is necessary to implement automatic reliable scheduling for directed acyclic graph (DAG) workflow which composed multiple tasks. Considering changing status networks machines position constraints that some tasks must be executed on specified scenarios, we propose novel approach based Deep Reinforcement...

Nowadays mobile multiplayer games have been an usual recreation, however energy-limited devices confine the game running time. Noticing component-based is a loosely coupled application whose components are nearly always required among players in one or more rounds, we study collaboration of to develop energy-efficient offloading scheme. We formulate 0-1 integer nonlinear programming problem minimize overall energy cost on player side under time-delay constraint. The intractable find optimal...

The InterPlanetary File System (IPFS) is a peer-to- peer distributed file system. It can greatly reduce the cost of data storage and improve performance download. Currently, IPFS-based systems mostly uses centralized backup mechanism. Although it provide high availability, nodes will be single fault become bottleneck system performance. This paper proposes high-availability strategy based on QoS interest IPFS nodes. Compared with existing methods, experimental results demonstrate that our...

Abstract More and more transformer on load tap changers are being tested using the AC method, which is closer to actual operating status of changers. From analysis switch status, test results value. However, existing calibration devices for changer testers all aimed at DC testers, traditional methods difficult achieve synchronous transition resistance, time, synchronization under signals. Therefore, this article designs a three channel variable resistor module based FPGA controlled DAC...

Abstract After large-scale integration of wind farms into the power grid, according to requirements State Grid’s grid connection operation guidelines, should have low-voltage ride-through capability. The short-circuit current will a significant impact on identification excitation inrush currents in transformers sent out by farms, and saturation also an differential protection. Analysis shows that after is connected, harmonic components contained fault output farm cause second braking...

With the rapid development of cloud native technology, a growing number applications run in containers. For service providers, accurate container workload prediction can contribute to improvement resource utilization and level agreement. However, containers that support different sorts businesses have preferences on requirements, thus methods via one general model cannot work for all In this paper, we propose novel method adapt classes obtain more results. We first develop an automatic...

Power output control of wind farm is an important way improving the performance and enhancing ability power grid to connect farm.In allusion fluctuation caused by large-scale integration power, this paper proposes a smooth strategy battery energy storage based on hybrid prediction.This has constructed dynamic reference active currents according hourly forecast results demand load power.By tracking system, will be realized, can respond balance system as well.The effectiveness practicability...

In the harsh environment of high altitude and altitude, in order to facilitate tracking amplification current signals power grid faults, reduce burden maintenance personnel working at a source testing equipment that is convenient carry, supply, can output multiple arbitrary waveforms designed. The device stably amplify any waveform signal within certain frequency range, ultimately stable signals. process adopts front-end DC-DC boost, back-end DC-AC inverter, closed-loop negative feedback, an...

When performing emotion recognition on long audio such as speeches, cutting the entire into segments that contain only one is first step. However, current research usually needs a small window to continuously slide along track, spending lot of time repetitive modeling. We propose two-stage fast speech conversion point detection algorithm. In stage, we use energy image obtain potential set for reducing samples needed be modeled. second perform at most two rounds search near each by using...

Due to the limited range of application and low efficiency existing professional measuring devices for energy fan unit, a new-type device measure unit has been developed with real-time wireless data transmission every measurement point. It main control computer three assistant microcomputers as processing cores. Data acquisition equipments are composed electrical power quality analyzer, air pressure sensors, temperature humidity sensors atmospheric sensor, relies on 485 communication Zigbee...