基于PHOENICS的成品油顺序输送的混油的模拟

针对成品油顺序输送混油问题,利用CFD通用软件PHOENICS,采用紊流模型,使用壁面函数法处理固壁边界,对混油规律进行了数值计算,给出了混油浓度的分布,并分析了流速、输送次序、粘度等对混油的影响情况。结果表明：流速越大,混油的长度越短;前行油品的粘度越小,混油长度越短。本文的研究结果对于成品油的顺序输送工艺设计具有一定的参考价值。     

参与式音乐治疗干预抑郁症患者康复的效果观察

抑郁症是精神科常见病,严重影响了患者的正常工作和生活质量,也给患者家庭及社会带来了沉重的负担,因此,需引起高度重视。近年来,参与式音乐干预疗法对抑郁症的效果受到越来越多医学工作者及患者的重视与认可。为此,我们以省脑科医院的110例抑郁症患者作为研究对象,进行了相关研究。我们在对患者进行随机分组后,一组给予医院常规治疗,另一组则在常规治疗的基础上加用参与式音乐治疗,我们观察了两组治疗2个月、3个月患者贝克自评问卷(BDI-13)和Hamilton抑郁量表(HAMD)评分变化以及临床效果情况。我们发现:治疗2个月、3个月后加用参与式音乐治疗的患者BDI-13和HAMD评分明显低于仅采用常规治疗的患者,临床疗效也更优。为此,我们得出这样的结论:参与式音乐治疗干预抑郁症,能够有效改善患者抑郁状况,显著提高治疗有效率,且该法具有简便、可靠、疗效高等特点,值得在临床医学推广。     

基于生理-心理学的热舒适和热健康探讨

基于生理学、心理学的角度提出热健康的概念,分析了热舒适产生的过程,并从人体的体温调节及水盐代谢系统、人体的感觉和神经应激、人体的心血管系统以及人体对热环境的认知方面详细讨论了热环境下人体生理和心理响应机制,并综述了国内外在热舒适和热健康这一方面的研究,最后探讨了热舒适与热健康之间的关系.     

用三聚氰酰胺修饰电极测定维生素VB1

制备了三聚氰酰胺修饰电极,用于测定维生素B1(Vb1).在pH 7.4的B-R缓冲溶液中,VB1在三聚氰酰胺修饰电极上产生一灵敏的还原峰,峰电流与VB1的浓度在6×10-6～1×10-3mol/L范围内呈良好的线性关系,检测下线为2.1×10-6mol/L.V86,VB2对VB1测定无干扰.电极的重现性良好,用于测定实际样品,得到满意的效果.     

多端直流系统分区协调保护策略

针对多端直流系统的故障保护问题,首先分析了直流故障特性及多端直流系统保护难点,总结了现有多端直流系统故障保护方法。然后,基于一种典型的多端直流系统拓扑结构,以使用最少数量直流断路器为目标,提出了多端直流系统区域保护划分原则和分区保护策略。该方法将直流故障区域通过直流断路器与非故障区域进行隔离,从而使非故障区域可以继续维持正常运行,而故障区域则通过换流站交流侧断路器和直流侧开关进行保护和隔离。最后,通过MATLAB/Simulink仿真平台建模及仿真分析,验证了多端直流系统分区保护的有效性和经济性。     

丁羟包覆层力学特性及本构模型研究

包履层是固体火箭发动机装药的重要组成部分,其力学行为影响着装药结构的完整性。为研究丁羟橡胶包覆层的拉伸力学性能,采用单轴拉伸实验方法拟合获取了Neo-Hookean、Yeoh、Mooney-Rivlin及Ogden超弹性本构模型的本构参数,对比分析了各模型对丁羟橡胶包覆层的适用性和精度。结果表明:丁羟橡胶包覆层具有显著的超弹特性,Neo-Hookean模型难以预示有限变形下丁羟包覆层的非线性特性,Yeoh模型可反映较大应变时的力学行为,而Mooney-Rivlin和Ogden模型可准确描述丁羟包覆层的力学特性,可应用于药柱/包覆层结构完整性的分析。     

新型二维材料MXene及MBene合成的研究进展

For exploring synthetic methods for MXene and MBene materials,the safer,greener and more reliable methods for synthesizing MXene have been proposed,and the preparation method of MXene using an organic solvent was pioneered. However,there are few reports on the synthesis of MBene experiments,and the feasibility of chemical etching was confirmed based on first-principles calculations. This article mainly reviews the research progress of two-dimensional transition metal MXene and MBene synthesis in recent years. The two-dimensional transition metal MXene with different elements was introduced to the corresponding synthetic method,and the intercalation stripping was also briefly introduced. Prospects for the future development and application of MXene and MBene were presented. We confirm that the excellent and stable synthetic structure of MXene and MBene is the premise of their development into application. We believe that with the deepening of research and the rapid development of synthetic technology in the field of material research,more MXene and MBene with good stability will be designed and synthesized,and the two- dimensional material family will be further developed.
     

Temporal and spatial dynamics of optical emission from laser ablation of the first wall materials of fusion device

Laser-induced breakdown spectroscopy(LIBS) has been developed to in situ diagnose the chemical compositions of the first wall in the EAST tokamak. However, the dynamics of optical emission of the key plasma-facing materials, such as tungsten, molybdenum and graphite have not been investigated in a laser produced plasma(LPP) under vacuum. In this work, the temporal and spatial dynamics of optical emission were investigated using the spectrometer with ICCD.Plasma was produced by an Nd:YAG laser(1064 nm) with pulse duration of 6 ns. The results showed that the typical lifetime of LPP is less than 1.4 μs, and the lifetime of ions is shorter than atoms at ~10~(-6)mbar. Temporal features of optical emission showed that the optimized delay times for collecting spectra are from 100 to 400 ns which depended on the corresponding species. For spatial distribution, the maximum LIBS spectral intensity in plasma plume is obtained in the region from 1.5 to 3.0 mm above the sample surface. Moreover, the plasma expansion velocity involving the different species in a multicomponent system was measured for obtaining the proper timing(gate delay time and gate width) of the maximum emission intensity and for understanding the plasma expansion mechanism. The order of expansion velocities for various species is V_C~+ V_H V_(Si)~+ V_(Li) V_(Mo) V_W.These results could be attributed to the plasma sheath acceleration and mass effect. In addition, an optimum signal-to-background ratio was investigated by varying both delay time and detecting position.     

福州传统村落古厝色彩基因特征研究

为响应美丽乡村建设和文化遗产保护的号召,文章以福州市林浦村为研究对象,依据《中国颜色体系》标准,采用实地考察、色卡比对、数据采集、分析归纳等研究方法,对区域内的古民居、祠堂、庙宇和其他具有代表性的古厝进行色彩基因提取,并进一步分析林浦村古厝色彩的地域性特征及其成因。研究表明,古厝色彩与地理区位、风土人情和建筑功能三个方面显著相关;建议针对该村落建筑的色彩特征,提炼和构建一套有效的建筑色彩标准,使传统村落的历史文化基因能够通过建筑色彩实现可持续传承与发展。     

构件化开发技术在啤酒行业的应用

构件化,对于信息化业界来说不是一个陌生的名词,本文谈谈以下两个方面的问题：什么是构件化？构件化合佳软件信息系统NERP在啤酒行业的应用。