In this paper, the cold-fluid model theory of an intense sheet electron beam is developed to investigate diocotron instability during its transport in a uniform magnetic field. The shows that if field strength and filling factor are increased separately, will be suppressed, which extends sheet-beam distance effectively. To verify above conclusion, set complicated instruments, measuring analyzing system (EBMAS), was measure cross section, current density, 3-D trajectory. process with...

A semi-analytical method is presented to analyze free vibration response of beam-plate-shell combined structures with general boundary conditions. Based on the energy theory, coupled annular plate-conical-cylindrical-spherical shell stiffened rings and bulkheads regarded as theoretical model constructed. The unified displacement admissible functions each substructure are expanded modified Fourier series auxiliary convergence along generatrix direction circumferential direction. Virtual...

In order to meet the high-power source requirement of compact submillimeter-wave systems, a G-band extended interaction klystron (EIK) has been developed at Aerospace Information Research Institute, Chinese Academy Sciences (AIRCAS), and reported for first time. The circuit design based on over-synchronous voltage high quality factor is proposed enhance output power gain. this manner, designed EIK achieved excellent test results compared with same type devices. Driven by 20.3 kV, 198 mA...

After the combustion of natural gas, flue gas contains large amounts water vapor. The latent heat vapor in account for 10%-11% lower heating value that is, if condensing were recovered, energy efficiency could be improved greatly. In order to improve space system by potential waste analyzed, and problems conventional proposed. A new approach was proposed, which decrease temperature recover simultaneously. outlet reduced below 25 °C. different processes proposed boiler, distributed system,...

Abstract Gas wave refrigerators are a type of refrigeration equipment with broad application prospects. The oscillating tube, its core component, was manufactured by brazing to improve production efficiency. To study the interface strength, small 304 stainless steel/T2 red copper T-type brazed joint specimen designed. tensile process simulated using ABAQUS software based on bilinear cohesive zone model (CZM), and results were compared experimental results. Damage critical stress fracture...

The new power system puts forward higher requirements for the functionality, real-time performance and reliability of relay protection equipment. Therefore, this paper designs a monitoring platform operation equipment at distribution network side under background system. obtains running state by establishing simulation models different types on side. fault time, type current action are analyzed to realize state. At same visual representation method data based three-dimensional parallel...

Combined with the problem of single direction solution existing sentence similarity algorithms, an algorithm for semantic based on syntactic structure was proposed. Firstly, analyze constituent, then through analysis convert into words basis structure, concept disambiguation, and, finally, realize comparison. It also gives comparison rules in more detail modifier which have certain contributions to sentence. Under same test condition, experiments show that proposed is intuitive understanding...

Abstract The Jiaguwen character, which is inscribed on ox bones or tortoise shells, one of pictographs, and it quite different from the modern Chinese characters. current description method computerized character glyph can not be complete successfully applied in describing glyph. changeable, some them have many variant forms. Considering these properties characters, a human computer interactive dynamic for proposed. It describes characters by using stroke-segments-vector stroke elements,...

By analyzing traditional distributed energy resource (DER) modeling methods, this paper proposes a feasible method of DER based on static generator in the simulation software — DIgSILENT. Behavioral model is proposed to simplify model, which simple electronic circuits or mathematical functions are used reflect physical characteristics certain model. With application method, battery storage system (BESS) implemented DIgSILENT environment. In each case, behavioral as well control strategy...

This paper presents an algorithm that automatically generates fonts based on Bezier curve. We locate the feature points by computing intersection of adjoining segments-elments, and draw segment which named Linear Bézier curves or quadratic between any adjacent points, stroke Chinese characters. greatly improves shape corner characters fonts. It can be used to dynamically generate character personalization true type font, overcome problem handwriting font design generation. is efficacious in...

This paper introduces the design results of RF circuit system for use in a G-band Extended Interaction Klystron (EIK). And EIK can produce an output power over 100 W, whose operating voltage is 16 kV with beam current 0.35 A. The adopts 2π mode and trapezoidal slow wave structure, meanwhile tuning structure cavity considered by choke piston. Considering loss caused roughness itself copper material practical engineering, conductivity respectively set to 1.5e+7S/m. Structure parameters are...

As an integrated supply system combining multiple forms of energy, the regional multi-energy can realize functions mutual aid and efficient consumption renewable energy. It is expected to become important energy solution help achieve strategic goals carbon peaking neutrality. Existing distribution network analysis methods tools are difficult apply directly systems. This paper systematically combines digital twin technology with planning operation Based on core twins technologies such as...

With the multimedia and network technology widely using in teaching, multiple intelligence theory was proposed. It suggests that traditional notion of intelligence, based on I.Q. testing, is too limited. provides a new perspective for curriculum development, implementation evaluation environment. From reform, this paper analyzes conception "intelligence curriculum" environment, through analysis characteristics under guidance intelligences, presents model modern classroom teaching...

The traditional multi-resolution Markov random field (MRMRF) model uses two-component on each resolution, and requires training data to estimate the necessary parameters, which is unsuitable for unsupervised image segmentation. Under this circumstance, a new with variable potential texture segmentation presented. solves problem by introducing function multi-level logistic distribution (MLL) scale. Using method, can automatically parameters produce accurate results. results obtained synthetic...

The uniqueness of Chinese makes language a hotspot in learning. In view the problem wrongly written character teaching teaching, it provides simple, convenient, and efficient input method characters realizes dynamic generation editing system for font, which solves problems real-time edit, coding, process using technology, convenient editing, printing, typesetting, research digital teaching. This can also be used processing ancient variants, Oracle bone inscriptions, Bronze inscription, folk...

Chinese characters are the basic elements of culture. It is also important basis foreign communication and exchange. Only simply considers glyph pronunciation modern character as object cannot fully display extensive profound needs to consider evolution characters, such Oracle Bone Inscriptions (OBI), bronze inscriptions, seal script, official regular cursive script running script. describe inherent relationship among various stages ensure their semantic consistency. Although there...

To improve the end-effect influence, which is a main reason of influence on characteristic linear motor, wavelet analysis used in study motor this paper. Traditional method based Fourier transform, but it analyzes non-stable signal will be usually lost some messages. Because time frequency location transform. Then transform research proposed. This paper compares with to analyze end-effect, results are shown that further suitable for motor. makes control system have good performances.

In this paper, the cold-fluid model theory is developed to investigate effective method decrease Diocotron instabilities for transport of high density sheet electron beam with increase magnitude uniform magnetic field and filling factor in tunnel, corresponding experiment carried out verify conclusion obtained. Then, several kinds tube X-band klystron (XSBK) W-band (WSBK) are developed, manufactured tested respectively. For XSBK PCM system, cross section 50×4 mm <sup...

The integration of renewable energy sources into power distribution systems frequently presents challenges for conventional management (EMS) due to the unpredictable and unstable characteristics such sources. As a result, novel cutting-edge solutions are required. This paper an intelligent web-based system (iW-EMS) specifically designed address optimization distributed resources, as outlined in proposed approach. incorporates hybrid approach that integrates simulated annealing cone...