Since 2015, China has witnessed a rapid increase in new energy vehicle (NEV) market penetration, achieving global leadership this sector. This study employs social network analysis (SNA) and Granger causality tests to examine how policy coordination influenced China’s NEV development from 2015 2023. We evaluated using six metrics: density, average path length, transitivity, clustering coefficient, number of components, size largest component. Our findings reveal both correlative causal...

Biocatalysis in high-concentration organic solvents has been applied to produce various industrial products with many advantages. However, using enzymes often suffers from inactivation or decreased catalytic activity and stability. An R-selective ω-amine transaminase Aspergillus terreus (AtATA) exhibited toward 1-acetylnaphthalene. AtATA displayed unsatisfactory solvent resistance, which is required enhance the solubility of hydrophobic substrate So, improving tolerance essential.The method...

Although a lot of researches have been carried out to evaluate efficiency and effectiveness different testing techniques there is still lacking experimental work on functional testing, particularly for black-box open-source software. In this work, four were chosen test two open source applications. The results confirmed some conclusions which obtained closed-source addition, few new observations also obtained.

Particle Swarm Optimization (PSO) has been widely used in the reactive power optimization of distribution networks, and basic PSO algorithm takes too long time to solve problem low voltage network with multiple constraints. To this problem, a scheme for low-voltage using improved particle swarm proposed. Improved dynamically classifies particles according constraints that each node is qualified, compensation capacity does not exceed preset value total system compensated rationally by...

Libraries are widely used by government, universities, research institutes, and the public since they storing managing intellectual assets. The library information directly stored in libraries about people interaction with can be transformed into accessible data which then will researchers to help better serve users. Librarians need understand how transform, analyze, present order facilitate such knowledge creation. For example, challenges face include make big datasets more useful, visible...

This paper introduces an advanced monitoring and diagnosis technique for the detection of incipient stator electrical faults in doubly-fed induction generators (DFIG) used wind turbines. Thanks to measurability DFIG rotor side characteristics, a new diagnostic method based on frequency analysis instantaneous power spectrum is proposed. Theoretical shows that, compared with common current or voltage methods, also has advantage that external sensors hardware devices are not needed. Moreover,...

The popularity of electric vehicles may lead to negative effects on the power system if charging procedures plug-in (PEVs) are uncoordinated. In order solve problem, hierarchical and zonal dispatching architecture a new bi-level optimization model respectively presented for charging/discharging schedules PEVs. upper level is devoted minimizing load variance so as implement peak shifting by optimizing plan all periods each vehicle aggregator (EVA), lower one aimed at tracing scheme determined...

The biggest difference between wind turbine generating units and other traditional ones (hydro thermal sets) is its frequent variation of the prime mover output power difficulties in control, due to volatility uncontrollability speed. In consideration characteristics system Direct Current (DC) generator, a generation based on DC generator developed, feasibility advantages this are analyzed theoretically, with emphasis placed control strategy. Then, simulative built dynamic laboratory. At...

At present, voltage regulation of no load distribution transformer is not flexible and failure rate mechanical on-load tap-changers high. To solve these problems, a scheme automatic system designed via thyristor for was proposed. The improved the existing topology power electronic device added overvoltage protection circuit thyristor. prototype has been tested completely. results show that, compared with switch, transition waveforms are better quality time shorter.

Multiple-instance learning (MIL) can solve supervised tasks, where only a bag of multiple instances is labeled, instead single instance. It considerably important to develop effective and efficient MIL algorithms, because real-world datasets usually contain large instances. Known for its good generalization performance, based on extreme machines (ELM-MIL) has proven be more than several typical classification methods. ELM-MIL selects the most qualified from each through hidden layer...

The effectiveness of on-line advertising is the key to success e-commerce. This paper discussed current status and new opportunities for online advertising, one critical factors successful With in-depth discussions our working experience in a US based company, we also proposed platform, Cicadida.com, which implemented few ideas discussed.

The converter transformer is one of the most significant components a HVDC station. And parameters play an important role in operation performance, technical and economic index system. According to valve's surge current level, combination with ac maximal short-circuit capacity three phase, rated dc voltage current, this paper describes calculation minimal short circuit impedance transformer. Considering certain margin, actual value obtained. Then valve side are calculated. With system...

Identifying communities is an important problem in network analysis.Various approaches have been proposed the literature, but most of them either rely on topological structure or node attributes, with few integrating both aspects.Here we propose a community detection approach based spectral clustering combining information and attributes (SpcSA).Some may not describe are trying to detect correctly.These irrelevant can add noise lower overall accuracy detection.To determine how much each...

In order to study the thermo-mechanical effect of large-size cables, thermal-structural coupling model is established calculate stress and deformation cables based on finite element method. According model, distribution characteristics temperature, are analysed in this paper. It turns out that, maximum appears metal sheath largest axial insulation layer. By means curve fitting, a quick formula proposed conductor. Finally, its influence studied by simulation electric field. The results show...

It is difficult to realize the effective separation of signal and noise in vibration signals, owing traditional filtering method. This paper puts forward an algorithm which was based on Hasudorff distance nonlocal means (Hasudorff-Non Local Means, HDNLM). makes use more efficient than Euclidean preserving details. aim improve weight model NLM Distance. Experimental simulation show that: The improved superior simple morphology, NLM, db8 wave transform denoising aspect. newly method combined...