蓄能器在某动力装置流体冲击试验系统中的应用

为验证某动力装置在实际高压流体冲击力作用下能否正常工作,需用一套模拟实际冲击过程的试验装置进行试验研究,其中的蓄能器用于模拟实际冲击源,提供高压流体冲击力。选用压力罐作为蓄能器,通过计算确定蓄能器参数,以达到模拟冲击系统所需要的条件。     

一起220 kV主变压器有载分接开关触头烧损缺陷分析

文中分析了一起有载分接开关触头在220 kV主变压器有载分接开关深度检修中首次报告烧损的缺陷。该有载分接开关经过试验和现场吊芯检查后,发现奇数侧主动触头组的A相触头发黑变色,转轴烧结失去功能。经分析奇数侧触头组的转轴接触电阻异常增大导致的过热为开关触头烧损的直接原因。根据缺陷产生机理分析,文中对有载分接开关日常运维提出了针对性建议,为后续类似工作处置提供了宝贵经验。     

The antifungal mechanism of electrolyzed oxidizing water against Aspergillus flavus

Fungicidal electrolyzed oxidizing waters (EOW) include neutralized electrolyzed oxidizing water (NEW) and acidic electrolyzed oxidizing water (AcEW). These forms were evaluated against Aspergillus flavus conidia (spores) and mycelia. EOW possessed strong antifungal activities against A. flavus conidia and mycelia due to destruction of the cellular structures of the A. flavus conidium and mycelium. K⁺ and Mg²⁺ leakage results from damage to the normal cellular functions of A. flavus conidia and mycelia. Among the physicochemical parameters of EOW, the available chlorine concentration (ACC) is primarily responsible for the EOW antifungal activity. A. flavus can be eliminated by use of AcEW and NEW as a new, alternative method of fungal control that is superior to some current physical methods and to synthetic chemical fungicides.     

Preparation and dielectric properties of SiO<Subscript>2</Subscript>/silicate-1 ceramics

For exploring the using of silicate-1 zeolite in dielectric ceramic, SiO₂@silicate-1 ceramics were fabricated by combining oxidation-bonding, sol–gel directional infiltration and sintering methods. The resulting samples were analyzed by X-ray diffraction, scanning electron microscope, energy dispersive spectrometer, digital hardness tester and microwave dielectric measurement system. It can be found that silicate-1 particles are well bond by silica sol. And the pores of perform are partially filled with silica. The sintering temperature has great effect on microstructure and properties of SiO₂@silicate-1 ceramics. When the ceramic is sintered at 400 and 600 °C, it keeps the MFI-type structure and almost has the same low-dielectric-constant (5.71 and 5.62, respectively). When the ceramic is sintered at 800 and 1000 °C, its MFI-type structure is broken down and its dielectric constant is 7.38 and 6.75, respectively.     

监测监控技术在神华哈尔乌素选煤厂安全生产中的应用研究

神华哈尔乌素选煤厂感烟感温工业电视监控系统的应用研究，能有效地监测和防范火灾的发生，也能为火灾事故的分析提供原始图象资料，这对改善选煤厂的安全生产状况和促进煤炭洗选行业的科技进步，都有重要的作用。     

建筑工程项目成本管理内控机制探讨

针对建筑工程成本管理在建筑企业管理中的重要性,介绍了工程项目成本管理内控机制的基本内容,具体对项目成本内控机制的实施作了探讨,从而更好的提高企业效益,增强企业市场竞争力。     

Deep Learning for EMG-based Human-Machine Interaction: A Review

Electromyography (EMG) has already been broadly used in human-machine interaction (HMI) applications. Determining how to decode the information inside EMG signals robustly and accurately is a key problem for which we urgently need a solution. Recently, many EMG pattern recognition tasks have been addressed using deep learning methods. In this paper, we analyze recent papers and present a literature review describing the role that deep learning plays in EMG-based HMI. An overview of typical network structures and processing schemes will be provided. Recent progress in typical tasks such as movement classification, joint angle prediction, and force/torque estimation will be introduced. New issues, including multimodal sensing, inter-subject/inter-session, and robustness toward disturbances will be discussed. We attempt to provide a comprehensive analysis of current research by discussing the advantages, challenges, and opportunities brought by deep learning. We hope that deep learning can aid in eliminating factors that hinder the development of EMG-based HMI systems. Furthermore, possible future directions will be presented to pave the way for future research.      

Order conditions for ARKN methods solving oscillatory systems

For the perturbed oscillators in one-dimensional case, J.M. Franco designed the so-called Adapted Runge-Kutta-Nyström (ARKN) methods and derived the sufficient order conditions as well as the necessary and sufficient order conditions for ARKN methods based on the B-series theory [J.M. Franco, Runge-Kutta-Nyström methods adapted to the numerical integration of perturbed oscillators, Comput. Phys. Comm. 147 (2002) 770-787]. These methods integrate exactly the unperturbed oscillators and are highly efficient when the perturbing function is small. Unfortunately, some critical mistakes have been made in the derivation of order conditions in that paper. On the basis of the results from that paper, Franco extended directly the ARKN methods and the corresponding order conditions to multidimensional case where the perturbed function f does not depend on the first derivative y^′ [J.M. Franco, New methods for oscillatory systems based on ARKN methods, Appl. Numer. Math. 56 (2006) 1040-1053]. In this paper, we present the order conditions for the ARKN methods for the general multidimensional perturbed oscillators where the perturbed function f may depend on only y or on both y and y^′.