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Effect of Non-Convective Zone Thickness on Thermal Efficiency of Salt Gradient Solar Ponds

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Energy Engineering 2021年第4期118卷 1185-1195页

作者： Nan Li ruiyang xu Caihong Zhang Guoping Wu School of Vehicles and Energy Yanshan UniversityQinhuangdao066004China Architecture Department Shijiazhuang Institute of Railway TechnologyShijiazhuang050541China

An improved radiation transmission and thermal efficiency model for solar ponds has been proposed based on both the Hull Model and Wang/Seyed-Yagoobi Model in this *** new model is more accurate to actual measured conditions because multiple reflections and turbidity effects are *** penetration,thermal conductivity loss and thermal efficiency under different Non-Convective Zone thicknesses are numerically analyzed and thoroughly *** results show thatΔT/I0 plays a critical role for the thermal efficiency of solar ***,it is found through calculation that there is an optimum thickness of the Non-Convective *** the Non-Convective Zone thickness is less than this critical threshold,both temperature and thermal efficiency are decreased with increasing ***,when the Non-Convective Zone thickness is greater than this critical threshold,the increasing turbidity within a certain range will be beneficial to improve the thermal efficiency of solar *** addition,optimum Non-Convective Zone thickness is also related to the temperature,turbidity,salinity variation and bottom reflectivity.

关键词： Solar pond Non-Convective Zone thickness thermal efficiency bottom reflective

WFRFT modulation recognition based on HOC and optimal order searching algorithm

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Journal of Systems Engineering and Electronics 2018年第3期29卷 462-470页

作者： LIANG Yuan DA Xinyu WU Jialiang xu ruiyang ZHANG Zhe LIU Hujun Information and Navigation College Air Force Engineering University

A hybrid carrier（HC） scheme based on weighted-type fractional Fourier transform（WFRFT） has been proposed *** most of the works focus on HC scheme＇s inherent characteristics, little attention is paid to the WFRFT modulation *** this paper, a new theory is provided to recognize the WFRFT modulation based on higher order cumulants（HOC）. First, it is deduced that the optimal WFRFT received order can be obtained through the minimization of 4 th-order cumulants, C_（42）. Then, a combinatorial searching algorithm is designed to minimize C_（42）.Finally, simulation results show that the designed scheme has a high recognition rate and the combinatorial searching algorithm is effective and reliable.

关键词： weighted-type fractional Fourier transform(WFRFT) modulation recognition higher order cumulants(HOC) combinatorial searching algorithm

Plasma-enhanced catalytic activation of CO_(2) in a modified gliding arc reactor

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Waste Disposal and Sustainable Energy 2020年第2期2卷 139-150页

作者： Hao Zhang Li Li ruiyang xu Jingying Huang Ni Wang Xiaodong Li Xin Tu State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China Department of Electrical Engineering and Electronics University of LiverpoolLiverpool L693GJUK

For the first time,this paper demonstrates a synergistic effect from the combination of a gliding arc discharge plasma with a photocatalyst TiO_(2) for CO_(2) *** effects of adding a tray downstream the discharge and the combination of the catalyst with plasma have been *** different combination modes of plasma catalysis,i.e.,in-plasma catalysis and post-plasma catalysis,have been evaluated with the emphasis on the analysis of potential *** results show that modifying the gliding arc reactor by the addition of a tray can enhance the fraction of gas treated by plasma,thus improv-ing the reaction *** exceptional synergistic effect of combining the gliding arc discharge with TiO_(2) for CO_(2) activation forms in the in-plasma catalysis *** presence of TiO_(2) significantly enhances the CO_(2) conversion by 138% and the energy efficiency by 133%at a flow rate of 2 L/*** plasma activation effect,which produces energetic electrons that can create the electron-hole pairs on the catalyst surface,is believed to be the major contributor to the generation of the plasma catalysis *** mechanism has been further evidenced by the negligible influence of the post-plasma catalysis on the reaction performance.

关键词： CO_(2)activation Plasma catalysis TiO_(2) Synergistic effect

Co-synthesis of vertical graphene nanosheets and high-value gases using inductively coupled plasma enhanced chemical vapor deposition

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Plasma Science and Technology 2018年第12期20卷 86-95页

作者： Jian YANG ruiyang xu Angjian WU Xiaodong LI Li LI Wangjun SHEN Jianhua YAN State Key Laboratory of Clean Energy Utilization Institute for Thermal Power EngineeringZhejiang UniversityHangzhou 310027People's Republic of China Department of Nuclear Engineering University of California at BerkeleyBerkeleyCalifornia 94720United States of America China United Engineering Corporation Hangzhou 310052People's Republic of China

One-step controllable synthesis of vertical graphene nanosheets （VGs） and high-value gases was achieved using inductively coupled plasma enhanced chemical vapor deposition （ICPECVD）. The basic physical properties of the ICPECVD process were revealed via electrical diagnosis and optical emission spectroscopy. The coil current and voltage increased linearly with the augmenting of injected power, and CH, C2, H2 and H were detected at a wavelength from 300 to 700 nm, implying the generation of abundant graphene-building species. The morphology and structure of solid carbon products, graphene nanosheets, were systemically characterized in terms of the variations of operating conditions, such as pressure, temperature, gas proportion, etc. The results indicated that an appropriate operating condition was indispensable for the growth process of graphene nanosheets. In the present work, the optimized result was achieved at the pressure, heating temperature, applied power and gas proportion of 600 mTorr, 800 ~C, 500 W and 20：20：15, respectively, and the augmenting of both CH4 and H2 concentrations had a positive effect on the etching of amorphous carbon. Additionally, H2 and C2 hydrocarbons were detected as the main exhaust gases. The selectivity of H2 and C2H2, measured in exhaust gases, reached up to 52% and 8%, respectively, which implied a process of free radical reactions and electron collision dissociation. Based on a comprehensive investigation of spectral and electrical parameters and synthesized products, the reaction mechanism of collision, dissociation, diffusion, etc, in ICPECVD could be speculated, providing a probable guide for experimental and industrial applications.

关键词： vertical graphene nanosheets gaseous products OES electrical diagnosis ICPECVD

Non-Traveling Wave Solutions for the (1 + 1)-Dimensional Burgers System by Riccati Equation Mapping Approach

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Applied Mathematics 2013年第10期4卷 123-125页

作者： ruiyang xu Songhua Ma College of Science Lishui University Lishui China

Starting from the symbolic computation system Maple and Riccati equation mapping approach and a linear variable separation approach, a new family of non-traveling wave solutions of the (1 + 1)-dimensional Burgers syst... 详细信息

关键词： Riccati Equation Mapping Approach Linear Variable Separation Approach Burgers System Non-Traveling Wave Solutions

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以任意角度连接的船体板的振动特性

中国造船 2016年第2期57卷 56-66页

作者：王献忠许瑞阳武汉理工大学高性能舰船技术教育部重点实验室武汉430063 武汉理工大学交通学院船舶、海洋与结构工程系武汉430063

将回传射线矩阵法应用于外激励作用下的以任意角度连接的两中厚板组成的耦合结构的振动分析。建立了耦合板结构的整体散射方程和关于未知波幅系数的控制方程,计算耦合板结构的动响应。通过与有限元计算结果的比较,验证了建议的方法的有... 详细信息

将回传射线矩阵法应用于外激励作用下的以任意角度连接的两中厚板组成的耦合结构的振动分析。建立了耦合板结构的整体散射方程和关于未知波幅系数的控制方程,计算耦合板结构的动响应。通过与有限元计算结果的比较,验证了建议的方法的有效性和较高的计算效率。

关键词：振动 Mindlin板理论回传射线矩阵法耦合板

Butler matrix enabled multi-beam optical phased array for two-dimensional beam-steering and ranging

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Photonics Research 2024年第5期12卷 912-920页

作者： ZUOYU ZHOU WEIHAN xu CHUXIN LIU ruiyang xu CHEN ZHU XINHANG LI LIANGJUN LU JIANPING CHEN LINJIE ZHOU State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Laboratory of Navigation and Location ServicesShanghai Institute for Advanced Communication and Data ScienceDepartment of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu 314200China State Grid Sichuan Electric Power Company Chengdu Xinjin Power Supply Branch Xinjin 611430China

Based on the wavelength transparency of the Butler matrix(BM)beamforming network,we demonstrate a multibeam optical phased array(MOPA)with an emitting aperture composed of grating couplers at a 1.55μm pitch for wavelength-assisted two-dimensional *** device is capable of simultaneous multi-beam operation in a field of view(FOV)of 60°×8°in the phased-array scanning axis and the wavelength-tuning scanning axis,*** typical beam divergence is about 4°on both *** multiple linearly chirped lasers,multibeam frequency-modulated continuous wave(FMCW)ranging is realized with an average ranging error of 4 cm.A C-shaped target is imaged for proof-of-concept 2D scanning and ranging.

关键词： optical tuning beam

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科学实在论的模型不确定性问题

哲学分析 2023年第5期14卷 155-169,199页

作者：徐瑞阳复旦大学科学哲学与逻辑学系

无论是传统科学实在论还是结构实在论,都面临着无法固定理论谓词指称的问题。诸多诉诸指称不确定性的反实在论论证在模型论上都可以归结为同一个现象,那就是理论与预期模型之间的对应关系不唯一,理论无法选定唯一的预期模型。从模型论... 详细信息

无论是传统科学实在论还是结构实在论,都面临着无法固定理论谓词指称的问题。诸多诉诸指称不确定性的反实在论论证在模型论上都可以归结为同一个现象,那就是理论与预期模型之间的对应关系不唯一,理论无法选定唯一的预期模型。从模型论角度对这一问题的考察将表明,一个可行的科学实在论方案需要在语义学主张上作出让步。

关键词：科学实在论符合论真理纽曼论证模型不确定性

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基于跳频的改进加权分数阶傅里叶变换

华中科技大学学报（自然科学版） 2019年第2期47卷 30-35页

作者：徐瑞阳达新宇梁源胡航空军工程大学信息与导航学院陕西西安710077

为提高4项加权分数阶傅里叶变换(WFRFT)的安全性能,提出了一种基于跳频的改进加权分数阶傅里叶变换.通过子载波跳频的方法打乱传统WFRFT中离散傅里叶变换(DFT)矩阵列的顺序,从而使加权傅里叶变换矩阵的周期以及加权系数的周期在跳频序... 详细信息

为提高4项加权分数阶傅里叶变换(WFRFT)的安全性能,提出了一种基于跳频的改进加权分数阶傅里叶变换.通过子载波跳频的方法打乱传统WFRFT中离散傅里叶变换(DFT)矩阵列的顺序,从而使加权傅里叶变换矩阵的周期以及加权系数的周期在跳频序列的影响下呈现多样性,提高其抗截获的性能.仿真结果表明:改进后的FH-WFRFT能够在参数信息被窃听方获取的情况下保护传输信息的安全,相比传统的WFRFT具有更好的抗截获性能.

关键词：通信安全安全性能加权分数阶傅里叶变换跳频抗截获性