Grid-connected photovoltaic (PV) systems are developing increasingly in recent years due to many associated economic and environmental factors provoking control operation problems utilities. Most of all, it also touches the essence management mechanism power systems. Concerning with voltage frequency stability, electricity quality short-term load forecasting, possible influences on secure stable system brought by grid-connected analyzed detail, side effects that might bring distribution...

Motivated by an efficient broadcast service in vehicular ad hoc networks (VANETs), we propose a TDMA-based channel access scheme for IEEE 802.11p control (CCH). The reduces the rate of transmission collisions and improves availability time slots on adjusting disjoint sets to vehicles moving opposite directions left right slot frames. Further, location information node is used allocate slot, which efficiently decreases collisions. Analysis simulation results city scenarios are presented...

In vehicular ad hoc networks, inside attackers can launch a false information attack by injecting emergency messages to report bogus events such as traffic accidents. this article, message detection scheme is proposed and evaluated. First, flow theory employed analyze behavior under accident scenario. It shows that “bottleneck” phenomenon triggered because the road capacity reduced blocked lanes at an site. The parameters, density, exhibit distinct statistical property compared accident-free...

The nuclear pore complex (NPC), composed of ∼30 different nucleoporins (Nups), is one the largest supramolecular structures in eukaryotic cells. Its octagonal ring scaffold perforates envelope and features a unique molecular machinery that regulates nucleocytoplasmic transport. However, precise copy number spatial location each Nup native NPC remain obscure due to inherent difficulty counting localizing proteins inside sub-micrometer complex. Here, we combined super-resolution single-point...

As the distributed computing applications represent comprehensive dynamics and user requirements in them are significant difference, they require dynamic differentiated fine-grained resource access control policies taking context factors into consideration before making decisions. With regards to this, paper investigates impact functions of policy decision, proposes a context-aware method. Firstly, is analyzed classifiedly formalized from four aspects including platform security context,...

In wireless communications, the performance of a smart antenna system depends heavily upon vector channels describing channel propagation between an array and mobile subscriber. The antennas perform quite well in stationary environments which characteristics are stable. However, dynamic where user is motion, knowledge how affected necessary for proper operation antennas. Here, we experimentally investigate variation parameters such as spatial signatures, directions-of-arrival (DOAs), complex...

A co-ordinated hierarchical control strategy for multi-infeed HVDC systems is presented. The law of the system's transfer power can be derived using optimal theory with system being treated as a variable admittance connected at commutation busbars. two-level structure assumed rectifier and inverter side AC system, respectively. constituent subsystems better by consideration voltage included in optimised performance index, both considered.

Mobile traces, collected by vehicular sensor networks (VSNs), facilitate various business applications and services. However, the traces can be used to trace identify drivers or passengers, which raise significant privacy concerns. Existing protecting techniques may not suitable, due their inadequate considerations for data accuracy requirements of different adversary's knowledge strategies. In this paper, we analyze issues in VSNs with a game theoretic model, where defender uses against...

We have developed a radiation-hardened standard cell library for space applications based on the commercial 65nm CMOS technology process. The cells are designed using some (RH) techniques, and effects of these RH approaches been validated. Also this has characterized to support verilog GDSII design flow, radiation tolerant features are: TID > 500 Krad(Si), SEL 100 MeV·cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> /mg, SEU 37 MeV cm2/mg.

In this paper, a coordinated recovery strategy for multi-infeed HVDC system is proposed. A nonlinear feedforward loop used to realize the control between two controlled variables at ends first. Secondly, constant AC voltage was implemented short period after fault removal. Finally, staggered different subsystems with restart time interval optimized using steepest descent method developed. The simulation results show, proposed strategy, performance of tested has been improved lot when...

Influenced by the energy crisis and environmental stress, wind power is growing rapidly for its mature technology good economic returns. East China Power Grid planning to construct million kW level base in northern Jiangsu coastal areas. As one kind of intermittent energy, power's output changes as speed. When a small proportion total generation, unbalance caused fluctuations usually can be illustrated grid. At that time, frequency deviation connection lines only brings little effects ACE,...

The transient voltage security and economy of power grid could be coordinated by reasonably choosing the installation locations capacity static var compensator (SVC). Quantitative assessment method has been proposed to identify weak areas key faults causing unsafe in system. Based on quantitative analysis, comprehensive improve margin is put forward used reflect effects SVC performance cost ratio defined for optimally configuring according largest principle ratio, process described detail....

It has been demonstrated that when the mobile terminal (MT) is stationary or moving at a very low speed, uplink spatial signature of MT stable enough and can be used as downlink weight vector in time-division-duplex (TDD) smart antenna systems. However, relatively high Doppler effect cause to change quickly. In order understand effects fast on signatures, experiments are conducted using 1.8 GHz real-time testbed with uniform circular array. When moves within 50 milliseconds, those parameters...

The choice of the mobility models affect seriously simulation results key technologies for Vehicular Delay Tolerant Networks. Most existing vehicular can be classified into synthetic model which do not conform to real scenario. With trace, this paper proposed realistic based on traffic flow theory has considered road topology, speed rules and routing selection. On basis, analyzed model's proximity actual behaviour, statistical characteristic network connection characteristic. show that...

Silicon monoxide(SiO)-based anode materials have been extensively examined as high energy density for lithium-ion batteries, but still suffer from low initial Coulombic efficiency(ICE). Here, A novel SiO-MnO/Mn2SiO4-MnxSi material, prepared through scalable ball milling and heat treatment, is proposed the first time, in which Mn2SiO4 MnxSi alloy solid-state reaction are embedded silicon oxide matrix to improve ICE. Half-cell testing shows that ICE of pristine SiO increased 52.5% 70.5%,...

In mobile communications, smart antenna systems that utilize an array and perform advanced signal processing techniques can suppress interference, increase channel capacity improve link quality by selective reception/transmission at the base station. However in a fast fading environment where there is relative motion between user array, ability of system to interference select desired fundamentally limited adverse nature vector channels. order develop accurate models for environments, we...

The fast moving of nodes will cause the frequent change network topology which makes data dissemination VANET (Vehicular Ad-hoc Networks) challenging. This paper proposes a strategy is called Adaptive Connectivity Data Dissemination Scheme (ACDDS), that is, calculate connectivity in current areas by distributed density perception algorithm, then hop limit function established on basis Euclidean distance and between hotspot, meanwhile, count message transmitted be limited dynamically order to...