Robust exponential passive filtering for uncertain neutral-type neural networks with time-varying mixed delays via Wirtinger-based integral inequality

This paper is concerned with the problem of the robust exponential passive filter design for uncertain neutral-type neural networks with time-varying mixed delays. Our aim is to design a Luenberger-type filter for estimating information about the neuron states, which is required in some applied areas. By constructing an appropriate Lyapunov-Krasovskii functional and using the Wirtinger-based integral inequality to estimate its derivative, a delay-range-dependent and delay-rate-dependent criterion is presented to ensure the augmented filtering dynamic system to be robustly exponentially stable and passive with an expected dissipation. Since the criterion is presented in the form of linear matrix inequalities with nonlinear constraints, a cone complementarity linearization algorithm is proposed to determine the filter gain from solution to the nonlinear problem. Finally, a numerical example is given to demonstrate the effectiveness of the proposed method.     

A simplified bit metric calculation method for high-order PSK

This paper proposes a simplified bit metric calculation method for high-order PSK signal with Gray-mapping. This method calculates the bit metric recursively by the symmetry of Gray code. Analysis and simulation results show that the proposed method can significantly reduce the computational complexity and maintain similar performance compared to ML and Max-Log bit metric. Additionally, this method generates bit metrics of PSK signals with different modulation order in the same way, so it can be applied to adaptive modulation system.     

计算机绘图与技术图样表达式

发明一种技术图样表达式。它用英文字母表示图形种类和尺寸要素，并用算术符号等字符表示图形和尺寸相互间的关系。用技术图样表达式可同时表示出图样的形状、大小、定位和公差、粗糙度等技术数据。图样表达式可作技术制图的尺寸标注，使图样大为简化；作计算机传输的信息，使计算机制图更为简易。     

浅谈仿生建筑创作方法

建筑仿生是当代建筑设计的一种类型,它依托于高技术、多学科的科研理论,追求建筑与自然和谐共生,注重节能、生态,是未来建筑发展的方向.该文旨在分析部分仿生建筑师的设计思想及其设计手法,浅谈仿生在建筑创作中的应用.     

气化小油枪燃烧器在300MW机组中的应用

介绍了一种新型的气化小油枪燃烧器的原理、结构和系统组成,并介绍了其在贵溪电厂300MW中速磨直吹式制粉系统煤粉锅炉上的应用情况。重点论述其在锅炉点火启动和低负荷稳燃过程中的投运步骤、注意事项和应用效果。     

Fabrication of polycrystalline aluminum oxide thin films via hydrolysis and hydrothermal reactions in solutions

Polycrystalline Al₂O₃ thin films were fabricated through a method combining urea hydrolysis and hydrothermal reactions. The overall growth temperature of these films was achieved as low as 150 °C. Although cracks occurred across the gel film after hydrolysis, a subsequent nucleation under elevated pressure and temperature resulted in a closely packed morphology. Moreover, the hydrothermal treatment led to high oxide content and an increase in crystallinity within the films.     

超临界二氧化碳在套管内换热的实验研究

对超临界CO2在套管内的换热特性进行了实验研究,探讨了超临界CO2换热过程中,质量流率、压力和入口温度的变化对换热性能特性和压降的影响。实验得出,换热系数随着质量流率的增加而增加;而换热系数随压力的增加而减少;入口温度的变化对换热系数基本没有影响;压降随着入口温度的升高而逐渐增大;并给出了Re和Nu数的变化规律。研究为超临界二氧化碳换热器的设计提供了依据。     

DSP在耳鸣治疗仪中的应用

本文以TMS320C3XDSP系列芯片为核心单元,设计耳鸣治疗仪。文中给出了系统原理图以及硬件与软件的设计方法。该系统是一个可调节系统,针对耳鸣作用的实质,可以对不同频率和相位的正弦数字信号进行调节。     

Solvothermal approach for low temperature deposition of aluminium oxide thin films

At elevated pressure, stoichiometric and high quality Al₂O₃ thin films are fabricated at 65-105 °C. By using pre-organised single source precursor aluminium(III) diisopropylcarbamate, Al₂O₃ were deposited on the surface of a Si substrate in a single step in the liquid phase. Comprehensive removal of large carbamate ligands by proposed β-elimination during decomposition of precursor led to an effective delivery of enshrouded Al-O fragments. Scanning electron microscopy revealed dense and grainy surface morphology. The thicknesses of the films were measured to be 150-300 nm and independent to reaction temperatures or reaction times. Through the use of near edge X-ray absorption fine structure spectroscopy, Al absorption peaks suggest a short range crystalline formation in a film deposited at 105 °C.     

Spectroscopic investigation of defects mediated oxidization of single-layer MoS2

Due to the extremely large surface to bulk ratio, the properties of single layer(SL) MoS_2 are largely determined by its interaction with environment. One critical interaction process that has been intensively investigated is the oxidation process of MoS_2.Despite numerous previous explorations, the detailed mechanism regarding how MoS_2 reacts with oxygen is still not well understood. In this work, we systematically investigate the impact of intrinsic and pre-created defects on the oxidation process of SL MoS_2. For pristine SL MoS_2, the oxidation is found to initiate near point defects and grain boundaries, leading to the formation of triangle pits in the basal plane and cracks near the grain boundaries. The pre-created defects introduced by ion irradiation are found to serve as the oxidation center, resulting in a more uniform oxidation process. The oxidation is found to introduce p-type doping in the SL MoS_2, leading to the blue shift of Raman and photoluminescence(PL) spectra. The shift is found to be more for the region near the grain boundary and for the samples with more pre-created defects. Our results suggest that the presence of defects can strongly promote the oxidation reaction of SL MoS_2 in ambient condition, which significantly affects the stability and functionality of materials.