In this communication, a <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$2\times2$ </tex-math></inline-formula> balanced filtering antenna array parallel-fed by differential broadband network is presented. The has four identical stacked elements, each of which consists main patch etched with folded U-shaped slot, pair ear-shaped parasitic patches, patch, and T-shaped strip. conceived topology can enhance...

Vision-based localization techniques and detection technologies are key algorithms for the navigation of unmanned vehicles. Especially in scenarios where GPS signals missing, Simultaneous Localization Mapping (SLAM) that rely on vision, inertial system (INS) other sensors have important applications. Among them, vision combined with IMU SLAM has advantage realistic scale, which is lacking monocular computational power compared to multi-visual so it suitable application an vehicle system. In...

Compared to the organic Rankine cycle (ORC), triangle (TC) is simpler in structure and not limited by pinch point temperature differences. TC has been studied some extent previous researchers, such as selection of working fluid, application, design expander. However, system optimization parameter analysis are still rare. The thermodynamic performance internal circulation heat recovery systems investigated theoretical numerical simulation, respectively. results indicate that expander inlet T3...

Different forms of inlet and outlet arrangements in microchannel heat sink have a significant impact on the efficient dissipation. In this paper, under framework finite element method coupled with Method Moving Asymptotes (MMA), three novel topology structures are proposed. Using Solid Isotropic Material Penalization Parametrization (SIMP), results different compared analyzed, minimizing average solid temperature, maximizing transfer capacity power consumption per unit transfer, 207 sets...

The present study aims to investigate the performance of a transcritical CO2 heat pump water heater system. Numerical models for two systems with or without intermediate exchanger were developed, and effects different operating condition parameters on system analyzed, correctness model was verified by experiments. According research results, optimal discharge pressure equation fitted an improved algorithm proposed. Moreover, results showed that temperature gas cooler outlet have significant...

In this paper, a compact two-port dual-band circularly polarized antenna for Radio Frequency Identification (RFID) and Wireless Local Area Network (WLAN) is presented. The novelty of research lies in the combination four inverted-F meandered monopoles stacked patch antenna. designed to cover European RFID Ultra-high frequency (UHF) band (865-868 MHz) WLAN (5.725-5.85GHz). proposed operating at 865MHz consists printed on substrate. order transmit data collected by reader management center...

Radar communication integration seems promising to meet multiple mission requirements, reduce the number of antennas, and improve utilization spectrum resources. However, proper system design is required obtain these advantages. In this paper, we propose a radar framework which allows share aperture, beamforming, spectrum, resource scheduling. Moreover, burst waveform proposed overcome impact saturated power amplifiers performance. develop test system. Test results validate feasibility...

In this article, a balanced filtering antenna array with quasi-Yagi performance is presented. The proposed design composed of balanced-to-single-ended power division network, two bandpass units and linear including four elements. A steep differential-mode (DM) passband frequency response obtained by introducing the triple-mode folded cross stub-loaded resonators (FC-SLRs) in network. fractional bandwidth center can be controlled conveniently adjusting dimensions FC-SLRs. Further, procedure...

In normal operation, there is no significant thermal stratification phenomenon in the tube bundle area of steam generator nuclear power plant. However, this detected marine plant isolation loops presence feedwater leakage. Therefore, an experiment was designed to verify stratification, and influence factors were analyzed by RELAP5/MOD3.2 program. The results show that mainly influenced initial water level at isolation, pressure total leakage mass, internal circulation generator. Leakage flow...

In this paper, a differential metasurface antenna with filter-like frequency response is proposed. By introducing two pairs of notch units, three radiation nulls are generated to improve the selectivity proposed antenna. A low-profile 0.08 $\lambda_{\theta}(\lambda_{\theta}$ wavelength in free space at center 5.7 GHz antenna) accomplished. Furthermore, high cross-polarization levels -50.09dB both xoz and yoz plane achieved. An impedance bandwidth 18.9% ($|\text{S}_{\text{d}\text{d}11}|\lt...

We review several physiological measurements for evaluation of human-environment systems, and discuss relatively simple useful methods focusing on those the autonomic central nervous system. The used to evaluate system include blood pressure, electrodermal activity electrogastrogram. In order system, we selected electroencephalogram, event-related potential evoked potential. demonstrate examples studies which were conducted light environment, sound environment mental work by using these parameters.

With the coal mining toward depth, there is an increased probability of gas explosion accidents. While propagation characteristics on account goaf environment have not been determined yet, which has great significance for prevention fire spreading to working face. This paper investigates critical void scale piles that allowed flames using a closed duct with dimensions 100 × 20 10 cm. The ratios stacked coals varied in 0.554, 0.521, 0.492, and 0.471. results show flame speed accumulations...

If the Probabilistic Neural Networks (PNN) based on classification method of equal size interval in training data is used to diagnose break marine nuclear power plant, accuracy diagnosis results low when small. Therefore, a for plant variable and PNN proposed. First, sizes are classified according interval. Then under different generated, learn it. Next, corresponding operation generated as real-time data. Finally, model size. The above processes repeated with three methods, including...