<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> A requirement of the three-level neutral-point-clamped voltage source inverter, with or without a separately supporting dc link, is to maintain balance two dc-link capacitor voltages. In this paper, balancing voltages for these possibilities analyzed and an algorithm proposed independently The considers average energy effect each vector on necessary optimal state sequence in modulation cycle....

High impedance surface absorbers comprising of lossless dielectric substrate and resistive pattern were studied based on equivalent circuit method. Resonant conditions in terms potential resonant frequencies corresponding resistance deduced. Theoretical calculation, numerical simulation experiment showed that expected absorption was obtained by matching the capacitance, inductance resistance. We demonstrated optimal frequency-dispersive between 0 377 Ω. For square, dipole square ring...

LiNi0.80Co0.15Al0.05O2 (NCA) as a lithium ion battery cathode material has received attention for its highly specific capacity and excellent low temperature performance. However, the disadvantages of high surface compound residues pH value have influenced processing performance limited application. This paper uses facile method to modify NCA through LiAlO2 coating. The results showed that when molar ratio Al(NO3)3·9H2O at was 0.25:1, decreased from 12.70 11.80 3.99% 1.48%. cell charged...

In this letter, the design of an ultra-thin magnetic-type radar absorber (RA) having good absorbing performance at low frequency is demonstrated. A 2-mm-thick RA with operating bandwidth 1.5-2.2 GHz obtained on basis polymer composites filled carbonyl iron and Co <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Z ferrite. The use selective surfaces (FSSs) results in a significant increase RA. By selecting unit dimensions FSS its location...

This paper presents the two-channel controller with inner current loops for dual bridge, DC/DC converter, based on modular multilevel converter (MMC) technology. The control strategy is two fast in dq rotating frame at each of MMC bridges. These controls facilitate operation through dc faults either bus. active power shared by MMCs, slower outer level. second loop minimizes losses, which achieved feedback magnitude both modulation indices maximal value 0.95 all loading levels. symmetrical,...

This paper presents a subsea DC collection grid with renewable power parks which inherently has robust fault protection and flexible expansion capability. By virtue of the applied DC/DC converter proposed DJ-Index Clamping control, different sections are functionally interconnected in meantime decoupled event faults. The faults selectively isolated without need for fast circuit breakers system recovery from faulty intertie branch is achieved by coordinated operation strategy on converters...

Currently, with the continuous advancement of network and communication technology, amount data carried by optical is very huge. The security high-speed large-capacity information in networks has attracted more attention. Quantum key distribution (QKD) provides information-theoretic based on laws quantum mechanics. Introducing QKD into an can greatly improve network. In order to reduce cost deployment infrastructure, signals classical are multiplexed same fiber wavelength-division manner....

This paper proposes a simple and accurate average value model (AVM) of high-power half-bridge MMC for electromagnetic-transient (EMT) studies. Least number generic EMT blocks is used. Functioning as voltage source converter (VSC), the accuracy simplified would eventually be determined by its in reproducing cell charging/discharging dynamics detailed models under all operating conditions. The validity proposed verified against 1GW 21-level PSCAD. System modelling AVM are tested with various...

Physical layer authentication is an important way to ensure the security of optical communication network. We hereby propose a scheme realize it by measuring variation bit error rate (BER) on both sides communication. In this scheme, legitimacy receiver identified analyzing BER fiber loop based short-term correlation channels. then simulate 16 PSK transmission system with intensity modulation direct detection-orthogonal frequency division multiplexing (IMDD-OFDM). The effect analyzed in case...

To realize the security in physical layer, this paper proposes a key generation scheme based on feature extraction of optical fiber channel. The experimental results show that with good randomness and can be achieved original rate reach 400kbit/s consistency 98%.

With the rapid development of IC technology, application FPGA becomes more and widely, than 90% embedded system design engineers world are using for a wide variety designs. The brings new opportunities challenges test manufacturers, innovative testing technologies solutions have been developed. This paper gives brief introduction to approach on an Automatic Test Equipment(ATE), describes method configuration mode selection code generation , detailed description process with Virtex-6...

The assembly, as the core part of low-pressure rotor manufacturing, is great importance to ensure its unbalance. Low-voltage assembly a multi-process process influenced by quality machining, process, and quality, resulting in unbalance that difficult predict during process. measurement important for subsequent optimization. Therefore, order achieve prediction this paper proposes an method based on mechanism data fusion. Firstly, through research analysis, influencing factors are determined,...

We design and implement a satellite optical switching hardware platform based on burst (OBS) technology. The runs stably realizes 20*20 channels of Microseconds level switching, which meets the requirements quality service (QoS) in current network.

A novel load-balancing routing algorithm based on satellite-ground cooperation is proposed to reduce the impact of inter-satellite link congestion in LEO satellite optical networks. Simulations prove that our proposal can significantly improve network throughput.

QoS sensitive routing is a very important component of traffic engineering in DiffServ MPLS-TP networks. This study investigated the characteristics packet scheduling algorithms and problem unfairness when does not consider mix classes. A new scheme STE-QOSPF-Mix, which takes reserved bandwidth supported WFQ algorithm into account, proposed. To determine route for flow request, STE-QOSPF-Mix considers effective available instead residual path, more suitable The simulation results show that...

There are many factors involved in the assembly process of complex products, but only a few key influencing really affect performance product assembly. In order to ensure it is necessary model deviation transfer flow products and identify processes characteristics determine its scope influence. This paper establishes set by analyzing uses networks combined with entropy weight method achieve identification factors. Based on factor results using an Apriori algorithm mine association rules...