Mobile edge computing (MEC) sinks power to the of networks and integrates mobile access Internet services in 5G beyond. With continuous development services, privacy protection is extremely important a heterogeneous MEC system for multiserver collaboration. However, most existing schemes only consider users or other than network topology. For purpose topology protection, this article employs blockchain construct systems adopts accommodative bloom filter as carrier multidomain collaborative...

The Internet of Things (IoT) is gradually becoming mature and has already entered our daily life, which interconnects more machines makes communication convenient intelligent. Massive IoT devices produce innumerable data need to be analyzed in joint cloud computation (JointCloud) with diversified services. However, due the weak security devices, existing JointCloud architecture hardly provides a secure trusted trade environment for users, affects severely application network. In this...

The Industrial Internet of Things (IIoT) accommodates a huge number heterogeneous devices to bring vast services under distributed computing scenarios. Most productive in IIoT are closely related production control and require network support with low delay. However, the resource reservation based on gross traffic prediction ignores importance treats them as ordinary services, so it is difficult provide stable delay for large amounts service requests. For many productions, unexpected...

Some airborne electronic devices having high power during their short work cycles will produce tens to hundreds of kilowatts waste heat. In order solve thermal management problem, phase change heat storage exchangers are widely used the high-power load in a time and then release it long time. Hence, research on performance an aluminium alloy three-channel corrugated plate-fin exchanger was done based computer simulation modeling. Results reveal that there exist three regions within this...

In this paper we propose a blockchain-based cross-domain authentication strategy. This strategy uses the cosmos network model to enable mobile devices reliably access external domain networks when moving across domains. Our test results prove feasibility of and have better performance than other schemes.

In this demonstration, we will reveal a full functional wireless access for vehicular environments (WAVE) prototype, which achieves the complete functions defined by IEEE 802.11p standard through integrating effective and novel base-band algorithms including fast time-synchronization, multiple-stage multiple Doppler detection, accurate channel estimate, joint QAM demodulation convolution decoding, all upon Cyclone III field programmable gate array (FPGA) development kit from Terasic Company....

The hardware‐in‐the‐loop (HIL) real‐time simulation for high‐speed train electrical traction system aims to reduce the design cost and speed up control verification process of algorithms in developmental stage unit. In this study, based on dSPACE simulator, multiple‐simulator, multiple‐simulation step HIL is first built. Second, associated discrete circuit modelling method, an optimisation method proposed minimise switching loss improve accuracy by selecting optimal discrete‐time switch...

This paper constructs a two-sector manufacturer model of endogenous technological progress. We analyze the impact environmental regulations on factor input and output different industries. Then, we reveal intermediary role inter-industry allocation in industrial green total productivity (GTFP). Finally, uses panel data from 30 provinces China’s industry 2000 to 2017 conduct empirical tests. can draw following conclusions: (1) The relative magnitude compensation production department...

Due to the complicated circuit topology and high switching frequency, field-programmable gate arrays (FPGA) can stand up challenges for hardware in loop (HIL) real-time simulation of power electronics converters. The Associated Discrete Circuit (ADC) modeling method, which has a fixed admittance matrix, greatly reduces computation cost FPGA. However, oscillations introduced by switch-equivalent model accuracy. In this paper, firstly, novel algorithm is proposed determine optimal...

We propose a blockchain-based IoT devices anonymous access system using zero-knowledge proof in cloud-based radio over optical fiber networks (C-RoFN) to prevent device sensitive information from being exposed massive devices.

Online deposit-free leasing service has witnessed rapid growth in China and shows a promising market the future. While eliminating requirement of deposit does attract more users to service, it also lowers cost for fraudsters. Since emergence this is relatively new, there are few works literature focusing on detecting fraud transactions it. Existing efforts mainly fall into hard-coded solutions such as block-listing or scorecard methods, which can be impotent face diverse tactics, e.g.,...

Abstract It is essential to predict the radioactivity distribution around reactor cooling system (RCS) during obligatory cyclic operation of AP-1000. A home-developed program CPA-AP1000 upgraded response activated corrosion products (ACPs) in RCS. The written MATLAB and it uses state art MCNP as a subroutine for flux calculations. pair power profiles were superimposed after initial full operation. effect noticed be more prominent in-core surfaces, followed by primary coolant out-of-core...

For the Hardware-In-The-Loop (HIL) real-time simulation of power converters, it is contradictory between model precision and FPGA resources when converter implemented in FPGA. To optimize resources, quantitative relation time step, word-length, have been studied. Based on Signal-Noise Ratio (SNR) theory, this paper proposes a algorithm to choose optimal step word-length that meet minimize HIL simulation. Taking three-phase inverter with LC filter as example, has proven by offline results....

This paper proposes a novel spectrum trading based on blockchain for resource allocation of optical network virtualization with strategy. Simulation results show the proposed scheme improves utilization rate operators.

We first present a blockchain-based cloud radio over fiber network architecture (B-RoFN) with bonus-penalty access control strategy (BPACS) for IoT service. The feasibility and efficiency of the B-RoFN BPACS are experimentally verified on our testbed.

The concept of "big data" has been mentioned much more times than ever before.At present, the hardware and distributed system with high performance can help us process data quickly, handle "all instead "random data".It is not necessary to depend on sampling method when dealing all result will be reasonable.College student growth management designed solve problems such as "what kind job suit me" or courses bring troubles for me".Employment guidance works by finding similar students in...

Based on the internal and external constraints of serious disease insurance commercial insurance, logistic model “whether you are willing to connect with basis insurance” “to understand objective conditions connection between commerci”a“ is designed. empirical research micro survey panel data 6 municipal districts in W City April 2020, following results obtained: among many influencing factors, “health status,” “per capita family income,” “gender,” “age,” “education level,” “number...