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A kinetic study and factor analysis of solar thermochemical membrane reactors for syngas production

Science China Technological Sciences 2025年第1期 207-221页

作者： Jiaxin XING Chao xu Xiangyu SUN Xin XIA fei JIN Qiongqiong JIANG Jiale GAO Key Laboratory of Power Station Energy Transfer Conversion and System of MOE School of Energy Power and Mechanical EngineeringNorth China Electric Power University Department of Chemistry University College London School of Chemistry and Chemical Engineering Ningxia Key Laboratory of Solar Chemical Conversion TechnologyState Ethnic Affairs CommissionNorth Minzu University

Solar thermochemical conversion technologies are promising for effectively utilizing solar energy by capturing the full spectrum of solar radiation. To overcome the challenges of low energy conversion efficiency and intermittency faced by solar thermochemical conversion, these technologies can be effectively integrated with membrane reactor technology. Although the performance of solar thermochemical membrane reactors has been experimentally tested, the chemical reactions and oxygen transport mechanisms during the energy conversion process remain poorly understood. This study introduces a resistance network model to elucidate the interactions between interfacial reactions and bulk diffusion during simultaneous oxidationreduction reactions on both sides of the membrane. We analyzed the oxygen flux of the membrane reactor under various operating conditions using this model to identify the reaction/transport-limiting side of the overall process. The most effective solar membrane reactor configuration utilizes natural gas and CO2, facilitating clean conversion of fossil fuels with significant advantages in fuel production and energy efficiency. Introducing CH4lowers the overall reaction temperature, maintains low oxygen partial pressure on the sweep side, and produces a synthesis gas with a 2:1 H2/CO molar ratio. Finally, a sensitivity analysis was used to explore the relationship between overall fuel production performance and operational parameters,highlighting the critical role of this research in enhancing the reaction and transport performance of membrane reactors and advancing the development of solar-driven thermochemical fuel production technologies.

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A continuum method for granular collapse with μ(I)-rheology-based dynamic earth pressure coefficient

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Particuology 2021年第5期19卷 214-226页

作者： Jianbo fei Yuxin Jie Hao xiong Chengyu Hong Underground Polis Academy Shenzhen UniversityShenzhen 518060China Key Laboratory of Coastal Urban Resilient Infrastructures(MOE) Shenzhen UniversityShenzhen 518060China College of Civil and Transportation Engineering Shenzhen UniversityShenzhen 518060China State Key Laboratory of Hydroscience and Engineering Tsinghua UniversityBeijing 100084China

In this paper,a continuum model with dynamic earth pressure coefficient is established to describe the granular slump process by introducingμ(I)*** rheology is adopted to quantify the normal stresses in our proposed model rather than shear stresses in classical *** constitutive laws of different depth-averaged continuum approaches including the hydrodynamic,Savage–Hutter and proposed models are comparatively investigated in terms of the rheological effects on the spread of a granular *** simulation results indicate that the proposed dynamic model captures some significant features during granular slump on inclined planes with different inclination angles(for example,the runout distance,runout time,and final profile).The proposed model can also reproduce the inner static sided axisymmetric region observed in tests when the granular column's initial aspect ratio(ratio of height to radii)is small.

关键词： Granular material Slump Rheology Continuum method

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垄断势力视角下平台大数据杀熟的价格歧视机理

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海南大学学报（人文社会科学版） 2025年第1期43卷 227-235页

作者：熊浩赵晓岚鄢慧丽徐宇淼海南大学国际商学院海南海口570228 海南大学国际旅游与公共管理学院海南海口570228

大数据杀熟问题近年来受到各界的广泛关注,政府出台了一系列有关大数据杀熟治理的政策文件。然而,诸多法规相互交叉、竞合,给监管执行造成了巨大的困难。大数据杀熟愈演愈烈,导致了消费者群体与涉事平台企业之间存在严重的信任危机。为... 详细信息

大数据杀熟问题近年来受到各界的广泛关注,政府出台了一系列有关大数据杀熟治理的政策文件。然而,诸多法规相互交叉、竞合,给监管执行造成了巨大的困难。大数据杀熟愈演愈烈,导致了消费者群体与涉事平台企业之间存在严重的信任危机。为了能更好地理解和治理大数据杀熟,本文深入分析了垄断势力视角下平台大数据杀熟的价格歧视机理。通过分析,揭示了大数据杀熟的经济逻辑为(:1)垄断势力是形成大数据杀熟的源泉(;2)大数据杀熟本质是不公平的高价价格歧视。在以上分析的基础上,本文对大数据杀熟的本质、认识误区和治理思路进行了分析,指出大数据杀熟治理的关键是反垄断和防欺诈。总之,本研究通过对大数据杀熟垄断势力下价格歧视机理的分析,厘清了大数据杀熟与价格歧视和精准营销的区别,从而为正确认识大数据杀熟和有效抑制大数据杀熟提供参考。

关键词：大数据杀熟平台经济价格歧视垄断势力

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Multifunctional integration on optical fiber tips: challenges and opportunities

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Advanced Photonics 2020年第6期2卷 23-46页

作者： Yifeng xiong fei xu Nanjing University College of Engineering and Applied SciencesNanjingChina

.The flat endface of an optical fiber tip is an emerging light-coupled microscopic platform that combines fiber optics with planar micro-and *** different materials and structures are integrated onto the endfaces,optical fiber tip devices have miniature sizes,diverse integrated functions,and low insertion losses,making them suitable for all-optical *** recent decades,the increasing demand for multifunctional optical fibers has created opportunities to develop various structures on fiber ***,the unconventional shape of optical fibers presents challenges involving the adaptation of standard planar micro-and nanostructure preparation strategies for fiber *** this context,researchers are committed to exploring and optimizing fiber tip manufacturing techniques,thereby paving the way for future integrated all-fiber devices with multifunctional ***,we present a broad overview of current fabrication technologies,classified as“top-down,”“bottom-up,”and“material transfer”methods,for patterning optical fiber ***,we review typical structures integrated on fiber tips and their known and potential applications,categorized with respect to functional structure configurations,including“optical functionalization”and“electrical integration.”Finally,we discuss the prospects for future opportunities involving multifunctional integrated fiber tips.

关键词： optical fibers fiber tips optical devices nanotechnology micro-optics nano-optics.

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INFORMATION IDENTIFICATION IN DIFFERENT NETWORKS WITH HETEROGENEOUS INFORMATION SOURCES

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Journal of Systems Science & Complexity 2014年第1期27卷 92-116页

作者： FENG xu ZHANG Wei ZHANG Yongjie xiong xiong College of Management and Economics Tianjin University China Center for Social Computing Tianjin University

Traditional cheaptalk game model with homogeneous information sources provided a con clusion that dishonest information sources will not be identified if he changes strategy stochastically. In this paper, the authors incorporate different information diffusion networks and heterogeneous in formation sources into an agentbased artificial stock market. The obtained results are different with traditional results that identification ability of uninformed agents has been highly improved with diffu sion networks and heterogeneous information sources. Additionally, the authors find uninformed agents can improve identification ability only if there exists a sufficient number of heterogeneous information sources in stock market.

关键词： Agent-based heterogeneous information information diffusion networks.

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Relay selection in cooperative communication systems over continuous time-varying fading channel

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Chinese Journal of Aeronautics 2017年第1期30卷 391-398页

作者： Geng Ke Gao Qiang fei Li xiong Huagang School of Electronic and Information Engineering Beihang University Beijing 100083 China Wuhan Maritime Communication Research Institute Wuhan 430205 China

In this paper, we study relay selection under outdated channel state information（CSI） in a decode-and-forward（DF） cooperative system. Unlike previous researches on cooperative communication under outdated CSI, we consider that the channel varies continuously over time, i.e., the channel not only changes between relay selection and data transmission but also changes during data transmission. Thus the level of accuracy of the CSI used in relay selection degrades with data transmission. We first evaluate the packet error rate（PER） of the cooperative system under continuous time-varying fading channel, and find that the PER performance deteriorates more seriously under continuous time-varying fading channel than when the channel is assumed to be constant during data transmission. Then, we propose a repeated relay selection（RRS） strategy to improve the PER performance, in which the forwarded data is divided into multiple segments and relay is reselected before the transmission of each segment based on the updated CSI. Finally, we propose a combined relay selection（CRS） strategy which takes advantage of three different relay selection strategies to further mitigate the impact of outdated CSI.

关键词： Channel state information Cooperative communication Fading Relays Wireless networks

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Investigation into Improvement for Anti-Rollover Propensity of SUV

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Chinese Journal of Mechanical Engineering 2017年第3期30卷 698-710页

作者： fei xiong Fengchong Lan Jiqing Chen Yuedong Yang School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou 510640China Guangzhou Automobile Group Co.Ltd Automotive Engineer Institute Guangzhou 511434China

Currently, many research from domestic and foreign on improving anti-rollover performance of vehicle mainly focus on the electronic control of auxiliary equip- ment, do not make full use of suspension layout to optimize anti-rollover performance of vehicle. This investigation into anti-rollover propensity improvement concentrates on the vehicle parameters greatly influencing on anti-rollover propensity of vehicle. A simulation based on fishhook procedure is used to perform design trials and evaluations aimed at ensuring an optimal balance between vehicle＇s design parameters and various engineering capacities, the anti-rollover propensity is optimized at the detailed design stage of a new SUV model. Firstly a four-DOF theoretical kinematic model is established, then a complete multi-body dynamics model built in ADAMS/car based on the whole vehicle parameters is correlated to the objective handing and stability test results of a mule car. Secondly, in fish- hook test simulations, the Design of Experiments method is used to quantify the effect of the vehicle parameters on the anti-rollover performance. By means of the simulation, the roll center height of front suspension should be more than 30 mm, that of rear suspension less than 150 mm, and the HCG less than 620 mm for the SUV. The ratio of front to rear suspension roll stiffness should be ranged from 1.4 to1.6 for the SUV. As a result, at the detailed design stage of product, the anti-rollover performance of vehicle can be improved by optimizing chassis and integrated vehicle parameters.

关键词： Fishhook test Tire normal force Roll center Roll stiffness

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Effect of kerosene injection states on mixing and combustion characteristics in a cavity-based supersonic combustor

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Chinese Journal of Aeronautics 2024年第4期37卷 308-320页

作者： xu LIU Peibo LI fei LI Hongbo WANG Mingbo SUN Chao WANG Yixin YANG Dapeng xiong Yanan WANG Science and Technology on Scramjet Laboratory College of Aerospace Science and EngineeringNational University of Defense TechnologyChangsha 410073China

It has been found that the static pressure distribution along the axial direction of liquid kerosene is lower than that of the gaseous kerosene under the same flow condition and overall equivalent ratio from previous *** further investigate this phenomenon,a compressible two-phase parallel simulation method is utilized to analyze the mixing and combustion characteristics of gaseous and liquid kerosene jets in a cavity-based supersonic *** numerical results are consistent with the experiments and demonstrate that gaseous injection leads to a cavity shear layer that dives deeper into the cavity,forming two recirculation zones in the front and rear of the *** contrast,the cavity shear layer is closer to the mainstream during liquid injection,and only a large recirculation zone is formed in the rear of the *** a result of the cavity shear layer and the recirculating flow,the fuel vapor of gaseous injection accumulates in the front of the cavity,while for the liquid injection,the fuel vapor disperses in the cavity,cavity shear layer,and the region above,and the rear of the cavity has a higher fuel vapor concentration than the *** unique fuel distribution causes the combustion area to be concentrated in the cavity during the gaseous injection but dispersed inside and downstream of the cavity during the liquid *** a result,forming a thermal throat under the same conditions is more challenging during liquid injection,and the generated static pressure distribution is lower than that during the gaseous injection.

关键词： Gaseous injection Liquid injection Mixing process Combustion Supersonic flow

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Cautiously using natural medicine to treat liver problems

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World Journal of Gastroenterology 2017年第19期23卷 3388-3395页

作者： fei xiong Yong-Song Guan Department of Oncology West China Hospital of Sichuan University

Natural medicine is a system of therapy that administrates natural agents and their derivatives to treat human *** medicine has been used to treat many kinds of human diseases for thousands of *** treatment protocols of natural medicine are integrative in nature,and are required to utilize the most appropriate therapies to address the needs of the individual *** of the relative convenience,safety and efficacy,natural medicine is now increasing *** doctors are licensed in many areas of the world and regulated partly by law in these areas,which is quite different from various other forms of complementary and alternative *** diseases,such as hepatitis,liver cirrhosis and liver carcinoma,are serious health problems *** half of the natural agents used in treatment of liver diseases today are natural products and their *** natural medicine is beneficial and safe,physicians should pay close attention to the potential side-effects of the naturopathic agents,which lead to liver injury,interstitial pneumonia and acute respiratory ***,when administrating naturopathic protocols to patients for the treatment of liver diseases,we should try our best to prevent and avoid as much as possible the negative impact of these *** article highlights the current practice and recommended improvement of natural medicines in the treatment of liver diseases and gives some specific examples to emphasize the prevention and management of adverse reactions of the natural agents and suggests that natural medicine should be cautiously used to treat liver problems.

关键词： Caution Natural medicine Herb Natural nutraceutical Liver disease Adverse reactions

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Structural and Histochemical Characterization of Developing Rice Caryopsis

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Rice science 2014年第3期21卷 142-149页

作者： YU xu-run ZHOU Liang xiong fei WANG Zhong College of Bioscience and Biotechnology Yangzhou University

The development of pericarp, seed coat, starchy endosperm and aleurone of the rice caryopsis was investigated, histochemically and structurally, from the time of flowering to maturity. The results showed that during its growth, the maximum length of the caryopsis was attained first, followed by width and then thickness. Histochemical examination of the caryopsis showed that starch was mainly accumulated in the endosperm, but the endosperm showed no metabolic activity, while embryo and pericarp contained a few starch grains, and embryo and aleurone were strongly active. Aleuronic cells contained many aleurone grains and spherosomes, and aleurone in the dorsal region developed earlier and contained more layers of cells. Amyloplasts in endosperm contained many starch granules and were spherical at early stages but polyhedric at late stages. The protein bodies appeared later than amyloplasts, and the number of protein bodies in subaleurone was greater than those in the starchy endosperm. The white-belly portion of endosperm might be relative to the status of amyloplast development.

关键词： rice caryopsis structure development chalkiness

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