Abstract: Model analysis was presented of bistatic scattering features from randomly rough surfaces theoretically. In particular, a statistical advanced integral equation model (AIEM) was selected as the working model. The scattering coefficients in the location of the dip in azimuthal plane were investigated...
Abstract: The sheet beam extended interaction klystron (SBEIK) has the typical and attractive characteristics with the plan structural multiple-gap cavity and extended beam-wave interaction system. A type of novel miniaturization strong-coupling five-gap extended resonant cavity was investigated combined with...
Abstract: As the key component of vacuum electron device (VED), slow wave structure is a kind of periodic structure, whose dispersion properties can be presented as the sum of an infinite number of space harmonic wave. Each space harmonic wave exits as a dispersion curve with its characteristic. We proposed t...
Abstract: An efficient hybrid approach, which combines the full-wave and high-frequency method, i.e., the multilevel fast multipole algorithm (MLFMA) based volume-surface integral equation (VSIE) and the modified surface integration (MSI) method, was proposed to analyze the electromagnetic characteristics of ...
Abstract: To study the effect of multipath richness in the two-mirror channel on the characteristics of the hexapolarized multiple-input multiple-output (HPMIMO) channel, a co-located and orthogonal dual-polarized antenna was designed, composed of an electric dipole and an electric loop working at 28GHz, base...
Abstract: Field mill type electric field sensors are widely used to measure the total electric field at ground level under the high voltage direct current (HVDC) transmission lines. The size of the traditional calibration device is extremely large and it is not very convenient to move for outdoor measurement ...
Abstract: With the integration degree of integrated circuit (IC) is increasingly high, the heat on a chip is also growing, which leads to an uneven temperature distribution intra-die and affects the propagation delay of the critical path thereby affecting the performance of buffer insertion path. A buffer ins...
Abstract: In order to reduce the influence of the outfield environmental temperature and improve the measuring precision of electromagnetic compatibility(EMC) test equipment, a method for antenna factor temperature error correction was presented. Firstly, according to the principle of two antenna calibration ...
Abstract: An improved eigenfilter-based wideband beamforming method with frequency invariance and nulls was proposed. Based on the optimization model formed by maximum energy array cost function and linear constraints of array response in main great direction, array spatial response variation was integrated i...
Abstract: Resonator integrated optic gyro (RIOG) employing laser diode (LD) is beneficial to miniaturization developing. However, when the frequency of the LD is tuned by current, accompany intensity noise is produced. Influence of current-tuning-induced intensity noise on the open-loop RIOG was theoretically...
Abstract: Based on the advantages of phased array and synthetic aperture imaging method in passive millimeter-wave imaging, a collaborative passive millimeter-wave imaging system was developed for real-time and high resolution imaging in human security application. In the horizontal orientation, by applying a...
Abstract: The microstructures and the electrical contact property may affect the performance of the macro scale objects, and the passive intermodulation (PIM) problems cannot be directly calculated by frequency-domain methods. Firstly, the Floquet's theorem combined with the full-wave method was proposed to a...
Abstract: In order to improve the limited band of passive radar absorbing materials, an active tunable microwave absorber was designed based on transmission line theory. The absorber was a planar structure based upon the topology of a Salisbury screen, but in which the conventional resistive layer was replace...
Abstract: Efficient radio wave coverage in confined space is one of the foundation factors to guarantee quality and reliability of communication which is important for the layout and optimization of the antenna system. However, the existing researches rarely consider the effect of the antenna parameters on fi...
Abstract: Equivalence principle algorithm (EPA) is a domain decomposition algorithm based on the Huygens' equivalence principle to solve large scale scattering problems. The errors of the equivalence principle operator (EPO) in EPA using cubic, spherical and smooth cubic equivalence surfaces were analyzed to ...
Abstract: Weapon equipment stealth is comprehensive. Stealth performance becomes one of the most important combat skills. Stealth testing and evaluation is an important indicator and indispensable link to realize the equipment stealth performance, involving stealth equipment from the design verification,desig...
Abstract: It is always an important tendency of the electronic power devices to explore and develop electromagnetic radiation sources operating on higher frequency and with higher power capability. The cyclotron electron device which was developed based on the mechanism of the electron cyclotron maser and wit...
Abstract: A new micro-structure scheme was proposed by using three parallel pencil beams instead of the sheet beam for the W-band staggered double vane traveling wave tube amplifier, and detailed analysis and optimization were given for the high frequency characteristic with its input/output couplers. The res...
Abstract: The atmospheric neutron radiation reliability parameters, such as hard failure, hard error and soft error for avionics neutron single event effect (NSEE) were defined. A set of testing and evaluation method to demonstrate the avionics NSEE-resistance capability was presented and verified by a case s...
Abstract: In order to solve the conflict of multi-sources information in the fault diagnosis process of avionics electric equipment, a method based on rough set theory and evidence theory for fault diagnosis was proposed. Because both rough set theory and evidence theory had advantages in dealing with uncerta...
Abstract: many-objective optimization is widely used in engineering area. There are some flaws to deal with many-objective optimization problem which the number of objectives exceeded three. The method which could chose proper individual solution is very crucial to solve high-dimension many-objective optimiza...
Abstract: In the existing high dynamic weak signal carrier tracking algorithm, frequency locked loops (FLL) auxiliary phase locked loops (PLL) carrier tracking algorithm has the problem that the loop adjusted discontinuously, and easily lost lock. More optimal combination FLL with PLL algorithm and transition...
Abstract: To solve problem of lacking emotional speech database with rich emotion annotation information, a Chinese dual-mode emotional speech database which contained speech and Electroglottography (EGG) information was established. Annotation and consistency detection for the established database were condu...
Abstract: Most of current research on online sketched military symbols recognition concerns only one type of symbols, point symbols or irregular symbols, using different methods to recognize separately. But in practical applications the two types of symbols are mixed. It becomes a major issue to find a way to...
Abstract: To improve signal-to-noise ratio of global navigation satellite system reflected signals, a method of processing navigation satellites reflected signal based on block averaging pre-processing (BAP) was presented, which divided the received signals into blocks with period of pseudocode and achieved t...
Abstract: Most of the conventional sequential Monte Carlo probability hypothesis density (SMC-PHD) approaches adopt the state transition density as importance sampling function. When targets are with nonlinear motions, such a selection makes few particles with large weights, leading to inaccurate estimation a...
Abstract: Due to the long-term coexistence of Internet Protocol (IP) and non-IP networks, there exist interconnection and interworking difficulties in heterogeneous networks for the difference of network architectures and protocols. Focusing on the gateway, the key node of heterogeneous networks interconnecti...
Abstract: Concerning the problems of limited current network security situation assessment scope, single information source, higher time and space complexity and larger deviation of the accuracy, a method was put forward to construct general cube, which can be aware of the network security situation. The cont...
Founded: 1956 (
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Sponsor: Ministry of Industry and Information Technology of the People's Republic of China
Sponsored by: Beijing University of Aeronautics and Astronautics