Probabilistic load flow (PLF) is a powerful and widely used tool to address the random nature of renewable energy resources for planning operation power systems. In this study, new approach using combination multiple integral method (MIM) cumulant (CM) proposed PLF studies. The problem with high dimensionality decomposed into bi-level solved by MIM CM reduce computational burden significantly while achieving satisfactory accuracy. applied IEEE 118-bus system compared point estimate method....

Inexpensive, nonintrusive, and easy-installation current sensors are of great help in the economical reliable operation power systems. In this article, a novel contactless sensor with small size, ultramicro consumption, self-power capability is proposed based on tunnel magnetoresistance (TMR). For measuring arbitrary line currents under an interference magnetic field, single-axis TMR chips array anti-interference method introduced. Then, designs software hardware given for ultralow-power...

Summary Network virtualization and transmission quality optimization are promising techniques for future Internet. Previous researches on virtual network embedding focused efficient utilization of resources. In this paper, we present a scheme that aims at improving the effect optimization. order to enable more service benefit from optimization, algorithm presented in paper follows aggregation principle. We also develop reconfiguration based load balance. Simulation experiments demonstrate...

Compatibility issues with irregular current injection islanding detection methods are actually the problem that some currents at same frequency injected into line may cancel each other out and then be impaired, which have been discussed under direct couple conditions (i.e., without grid-connected transformers) in literature. This article analyzes opposite where distributed generation (DG) units equipped transformers, is aimed finding a solution. The analysis derives setting formulas of key...

The low power density of a magnetic field energy harvester (MFEH) limits its applicability. Conventional methods for improving harvesting, e.g., increasing the volume core, cannot effectively increase output MFEH. And it increases burden on transmission lines. An in-depth investigation reveals that by adding an optimal series-connected capacitor before rectifier, MFEH can be maximized. By reducing net voltage applied to magnetizing inductance, flux accumulation is slower, lengthening...

The algorithm of cooperative spectrum sensing in cognitive radio networks can improve detection probability frequency while increase cost control channel, How to reduce the is one key technology sensing. adaptive mixed weighted proposed, based on signal-to-noise ratio energy detector, and determine contribution according a detector ratio, allocate relevant value, invalid transmission. Results show that proposed improved probability, meanwhile, average number bits decrease, perceived channel overhead.

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Abstract Anomaly event detection is vital in surveillance video analysis. However, how to learn the discriminative motion crowd scene still not tackled. Here, a deep social force network by exploiting both extracting and coding proposed. Given grid of particles with velocity provided optical flow, interaction investigated module embedded network. A convolution was further designed 3D (DMC‐3D) module. The DMC‐3D only eliminates noise spatial encoder–decoder but also learns feature...

70-nm T-gate InP-based low noise In0.52Al0.48As/In0.65Ga0.35As pseudomorphic high electron mobility transistor (PHEMT) with well-balanced cutoff frequency ft and maximum oscillation fmax were designed fabricated. DC, RF, characterizations are demonstrated. The saturation current density Idss extrinsic transconductance gm,max measured to be 894 mA/mm 1640 mS/mm, respectively. And the extrapolated based on inflection point 247 GHz 392 GHz, Due disadvantages of traditionally used Y-factor...

This paper presented the development of a novel large-signal equivalent circuit model for InP-based pseudomorphic high electron mobility transistor (PHEMT) MMIC applications beyond 100 GHz. A new set I-V functions was built in to depict accurately measured results this device. The convergence good during HB (harmonic balance) simulation. To verify feasibility model, 110 GHz amplifier based on designed and fabricated, on-wafer results, which include Pout, Gain PAE (Power Add Efficiency), were...

This paper discussed the application of online monitoring system based on IEC61850 standard in smart substation. Firstly, functions and performance requirements have been discussed, functional model interface established; Secondly, schema has designed for Furthermore, according to practical pilot project, validity models verified, a summary given.

A quantitative comparison of multiline TRL (thru-reflect-line) and LRM (line-reflect-match) on-wafer calibrations for scattering parameters (S-parameters) measurement InP-based PHEMTs is presented. The undertaken the first time covers a frequency range from 70 kHz to 110 GHz. It demonstrated that accuracy calibration in good agreement. Both methods outperform conventional SOLT full band up Then excellent RF performance obtained by extrapolation on basis inflection point, including maximum...

Cognitive radio (CR) technology can identifying the available spectrum resource through sensing, deciding on optimal transmission times, and maintain maximum throughout of networks. The important functions is medium access control (MAC) protocols. In this paper, we have research design methods common channel CR MAC Which single multi-channel protocol sensor discuss in detail. end, analyze compare classics protocols, main challenges future directions are presented.

90-nm T-shaped gate InP-based In0.52Al0.48As/In0.6Ga0.4As pseudomorphic high electron mobility transistors were designed and fabricated with a gate-width of 2 × 30 μm, source—drain space 2.5 source—gate 0.75 μm. DC, RF small-signal model characterizations demonstrated. The maximum saturation current density was measured to be 755 mA/mm biased at Vgs = 0.6 V Vds 1.5 V. extrinsic transconductance 1006 mS/mm −0.1 extrapolated gain cutoff frequency oscillation based on S-parameters from 0.5 110...

可重构柔性网络链路失效将严重影响其上承载的可重构服务承载网(RSCN)的可靠性。文章基于路径备份策略着重解决时延敏感类型RSCN的可靠性问题，并提出分阶段处理方式进一步优化备份资源消耗。在拓扑预处理阶段，根据RSCN是否支持路径分裂分别提出分裂的最小备份拓扑生成(S-MBT-Gen)算法和最小备份生成树(MBST- Gen)算法，减小备份拓扑带宽约束总量；在拓扑映射阶段，提出主备拓扑协同映射(RNM-PBT)算法，协调利用底层网络资源。仿真结果表明，本文提出的算法降低了RSCN平均资源消耗，且具有较高的请求接受率和较低的平均执行时间。

Abstract High-performance sensors and high-efficiency accurate measurement technology are the basis of power grid control, monitoring, analysis decision-making. Current monitoring devices commonly used in systems cannot meet need for simultaneous steady-state current transient current. In this paper, a high-performance sensor based on giant magnetoresistance is developed, key technologies such as structure, chip selection, signal processing circuit electromagnetic compatibility designed. The...

With the ever-growing number of base stations (BSs) and user equipments (UEs) in ultra-dense networks (UDN), reusing same pilot sequences among cells is inevitable. reuse scheme, channel estimation obtained at a BS contains not only desired channel-state information (CSI) but also interference from neighboring cells, which can severely degrade CSI performance adversely affect communication performance. In this paper we consider contamination avoidance based on pattern design for UDN where...