Fluorescence microscopy plays an important role in biomedical imaging because of its high sensitivity and specificity. However, the resolution of traditional fluorescence microscopy is limited due to the optical diffraction. Various techniques have been developed to surpass the diffraction limit in recent...

High penetration of intermittent distributed generation access to the grid is a new challenge of the grid planning and operation. In order to achieve the best balance between economic cost and distributed generation capacity, a new method of active distribution network integration considering voltage...

There are three kinds of main connection modes, including single bus connection, inner bridge connection and enlarged inner bridge connection, in the different stages of the construction of the internal bridge connection circuit for substation, which were equipped with one of the three backup automatic...

This paper presents a detection method of input phase lack of power unit in cascaded high voltage inverter. The method determine the input phase lack of power unit in cascaded high voltage inverter through the detection of primary negative sequence current of phase shifting transformer. The start-up...

The utility industry has entered into Big Data era as the construction and development of smart grid. It becomes more critical to store and process the Big Data efficiently, and to make effective utilization when the power Big Data are massive complicate. This paper analyses the status of power Big Data....

This paper proposes a dynamic phasors model of HVDC systems including the converter, DC line and control when the AC systems are symmetrical and analyses the simulation process of the proposed dynamic phasors model. The proposed dynamic phasors model can rapidly reflect the dynamic characteristics of...

The results of researches of asynchronous electric drives with the frequency control which are carried out for the purpose of establishment of causes and effect relationships between a control method, the implementable standard frequency converter of the Schneider Electric company (ATV-71, ATV-32) and...

Electric power steering (EPS) system can not only provide steering power and lighten the burden of the driver's manipulation, but also improve vehicle steering performance and driving comfort, thus improving vehicle active safety. However, in the process of EPS system development, the determination of...

In order to take the advantage of electromagnetic transient (EMT) simulation method and dynamic phasors simulation method, a new hybrid simulation of AC-DC system, electromagnetic transient - dynamic phasors hybrid simulation of AC-DC system, where dynamic phasors model and traditional EMT models are...

DC grid has been treated as a viable solution to solve green-house effect and reduce the cost of fossil fuels. Compared with AC grid, DC grid shows many inherent advantages, such as high efficiency power delivery, less expensive to deploy and no need for phase and frequency synchronization. However,...

In view of the lack of reliability theory in the evaluation of investment efficiency of power equipment overhaul, this paper presents a reliability evaluation system based on reliability theory for investment in power equipment overhaul. Based on the reliability optimization theory, this paper studies...

In the reform of the power system for more than a decade, China's power market to participate in the main body has been in the power generation side to form a multi-subject competition situation, but the transmission, distribution, sale of vertical integration of the monopoly situation still exists,...

In this paper, we study how to allocate the capacity of links in order to both restrain the propagation of cascading failures and to improve the robustness of the whole power grid system. Based on related works, we propose a graph-aided model which maps the real power grid into a graph. It can be viewed...

This paper presents a method of power grid loop detection based on graph database. The topology concept is introduced to extract the network relationship from the power grid equipment. The devices and power lines in the power grid correspond to the vertices in the topological graph, and the connection...

The vortex tube which is used to separate the dust of air flowing in the engine can reduce or eliminate the damage of the dust to the engine and guarantee its security. Total pressure loss performace is presented through Navier-Stokes equation and standard turbulence model. This paper shows the influence...

The purpose of this paper is to design a direct down-conversion system using sub-harmonic mixer with microstrip lines, it is also called a zero intermediate frequency system. By utilizing the direct conversion configuration, it can not only avoid to use an additional voltage controlled oscillator and...

Based on the analysis of the principle of phase difference detection for marine power station's parallel operation set, a method for improving the accuracy of phase difference detection is presented. This method uses the interruption mode to reset and read the current count value of high speed counter...

Establish reliability model of marine power station under different working conditions. On this basis, the reliability model database of ship power station system is established. Through the real-time online detecting the different working conditions of the marine power station, the corresponding reliability...

The method of X-ray pulsar-based navigation can be applied to deep space exploration and earth-orbiting spacecraft navigation for its good performance in reliability and autonomy. But high-precision navigation can be hardly achieved when the input of navigation system is merely the signal of pulsars....

Based on the insulation structure in stator slot of typical generators, this paper presents an analytical illustration to the fault expansion cause of turn-to-turn insulation failure through the fault example. The equivalent circuit is built up for analyzing the solid insulation layer with defects such...

Lithium ion battery and its safety are taken more consideration with fossil energy consuming and the reduction requirement of CO2 emission. The safety problem of lithium ion battery is mainly contributed by thermal runaway caused fire and explosion. When the lithium ion battery fire and explosion, gases...