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A numerical study of accelerated moderate or intense low-oxygen dilution(MILD)combustion stability for methane in a lab-scale furnace by off-stoichiometric combustion technology

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Chinese Journal of Chemical Engineering 2021年第4期34卷 108-118页

作者： Mengqian Xie Fangqin Dai Yaojie tu The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China School of Energy and Power Engineering Huazhong University of Science and TechnologyWuhan 430074China

Moderate or intense lowoxygen dilution(MILD)combustion has become a promising lowNOX emission technology,while the delayed mixing of reactants and slower oxidation rate could potentially cause ignition instability in some *** paper proposes a new idea for enhancing the ignition stability for methane MILD combustion by combining with offstoichiometric combustion(OSC),and its performances have been numerically assessed through a comparison against the original MILD combustion *** results reveal although nonpremixed pattern has the lowest NO emission,it suffers from a larger liftoff distance,thus less ignition ***,both partiallypremixed and fully premixed patterns exhibit excellent ignition *** the considered OSC conditions,the pattern of Inner ultrarich and Outer lean produces the lowest NO emission while maintains a high ignition ***,the enhancement of the combustion stability by implementing OSC to the original MILD combustion burner is shown by comparing the operational range of furnace wall temperature(Tf),CO and NO emissions,as well as the evolution of chemical *** comparison reveals that OSC can extend the lowest operational Tf from 900 K to 800 *** importantly,OSC can significantly improve the ignition stability in the whole range of Tf as compared to the original MILD combustion burner.

关键词： MILD combustion Off-stoichiometric combustion NO emission Ignition instability Burner design

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Self-Assembled Porous-Reinforcement Microstructure-Based Flexible Triboelectric Patch for Remote Healthcare

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Nano-Micro Letters 2023年第7期15卷 324-336页

作者： Hao Lei Haifeng Ji Xiaohan Liu Bohan Lu Linjie Xie Eng Gee Lim Xin tu Yina Liu Peixuan zhang chun Zhao Xuhui Sun Zhen Wen Institute of Functional Nano and Soft Materials(FUNSOM) Joint International Research Laboratory of Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123People’s Republic of China Department of Electrical and Electronic Engineering School of Advanced TechnologyXi’an Jiaotong-Liverpool UniversitySuzhou 215123People’s Republic of China Department of Applied Mathematics School of Mathematics and PhysicsXi’an Jiaotong-Liverpool UniversitySuzhou 215123People’s Republic of China Department of Electrical and Electronic Engineering University of LiverpoolLiverpool L693GJUK Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Soochow UniversitySuzhou 215123JiangsuPeople’s Republic of China

Realizing real-time monitoring of physiological signals is vital for preventing and treating chronic diseases in elderly individuals. However,wearable sensors with low power consumption and high sensitivity to both weak physiological signals and large mechanical stimuli remain ***, a flexible triboelectric patch(FTEP) based on porous-reinforcement microstructures for remote health monitoring has been reported. The porousreinforcement microstructure is constructed by the self-assembly of silicone rubber adhering to the porous framework of the PU sponge. The mechanical properties of the FTEP can be regulated by the concentrations of silicone rubber dilution. For pressure sensing, its sensitivity can be effectively improved fivefold compared to the device with a solid dielectric layer, reaching 5.93 kPa^(-1) under a pressure range of 0–5 kPa. In addition, the FTEP has a wide detection range up to 50 kPa with a sensitivity of 0.21 kPa^(-1). The porous microstructure makes the FTEP ultra-sensitive to external pressure, and the reinforcements endow the device with a greater deformation limit in a wide detection range. Finally, a novel concept of the wearable Internet of Healthcare(Io H) system for real-time physiological signal monitoring has been proposed, which could provide real-time physiological information for ambulatory personalized healthcare monitoring.

关键词： Pressure sensor Triboelectric nanogenerator Porous dielectric layer Physiological signals Internet of Healthcare

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Radix Panacis quinquefolii Extract Ameliorates Inflammatory Bowel Disease through Inhibiting Inflammation

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Chinese Journal of Integrative Medicine 2023年第9期29卷 825-831页

作者： WANG Xi-xin ZOU Hong-yuan CAO Yong-na zhanG Xuan-ming SUN Meng tu Peng-fei LIU Ke-chun zhanG Yun Biology Institute Qilu University of Technology(Shandong Academy of Sciences)Jinan250103China Kyiv National University of Technologies and Design Kyiv01011Ukraine School of Chinese Materia Medica Beijing University of Chinese MedicineBeijing100029China State Key Laboratory of Natural Medicines and Biomimetic Medicines School of PharmacyPeking UniversityBeijing100191China

Objective: To investigate the anti-inflammatory activity of Radix Panacis quinquefolii extract(RPQE) and its therapeutic effects on inflammatory bowel disease(IBD). Methods: The 72-hour post-fertilization zebrafish was used to generate the local and systematic inflammation models through tail-amputation and lipopolysaccharide(LPS)-induction(100 μg/m L), respectively. The Tg(zlyz:EGFP) zebrafish was induced with 75 μg/m L 2,4,6-trinitrobenzene sulfonic acid(TNBS) for establishing the IBD model. The tail-amputated, LPS-, and TNBS-induced models were subjected to RPQE(ethanol fraction, 10–20 μg/m L) administration for 12 and 24 h, respectively. Anti-inflammatory activity of RPQE was evaluated by detecting migration and aggregation of leukocytes and expression of inflammation-related genes. Meanwhile, TNBS-induced fish were immersed in 0.2%(W/V) calcein for 1.5 h and RPQE for 12 h before photographing to analyze the intestinal efflux efficiency(IEE). Moreover, the expression of inflammation-related genes in these fish was detected by quantitative polymerase chain reaction. Results: Subject to RPQE administration, the migration and aggregation of leukocytes were significantly alleviated in 3 zebrafish models(P<0.01). Herein, RPQE ameliorated TNBS-induced IBD with respect to a significantly reduced number of leukocytes, improved IEE, and inhibited gene expression of pro-inflammatory factors(P<0.05 or P<0.01). Conclusion: RPQE exhibited therapeutic effects on IBD by inhibiting inflammation.

关键词： Radix Panacis quinquefoli extract anti-inflammatory zebrafish inflammatory bowel disease

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Conductivity characteristics of landslide considering porosity,saturation,temperature and ion concentration

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Journal of Mountain Science 2023年第8期20卷 2133-2148页

作者： XIONG Bo-bo YANG Shi-jie ZHAO Bing-qin LU Xiao-chun TIAN Bin LI Cheng WU Xuan-xuan tu Xiao-long College of Hydraulic and Environmental Engineering China Three Gorges UniversityYichang 443000China College of Civil Engineering and Architecture China Three Gorges UniversityYichang 443000China Hubei Energy Group Luotian Pingtanyuan Pumped Storage Co. Ltd.Huanggang 438000China

High-density resistivity imaging method is widely used in landslide *** resistivity of rock and soil is closely related to factors,such as porosity,moisture content,saturation and *** this study,the resistivity test was designed to investigate the influence of physical factors and pore solution components on the resistivity of landslide *** and analytical results find that both moisture content and volumetric water content varies greatly under the same *** different temperatures,soil resistivity exhibits great *** the same temperature,the ion concentration and species in pore solutions have great influence on soil *** on the test results and grey correlation analysis,this study established a resistivity model by considering porosity,saturation,temperature and ion *** study lays a foundation for the high-density resistivity method to measure the moisture content of landslides.

关键词： Landslide monitoring High-density resistivity method Pore fluid composition Resistivity model

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The modulation of the discharge plateau of benzoquinone for sodium-ion batteries

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International Journal of Minerals,Metallurgy and Materials 2021年第10期28卷 1675-1683页

作者： Feng-hua Chen Yi-wen Wu Huan-hong zhang zhan-tu Long Xiao-xin Lin Ming-zhe Chen Qing Chen Yi-fan Luo Shu-Lei Chou Rong-hua Zeng Key Laboratory of Theoretical Chemistry of the Environment Ministry of EducationSchool of ChemistrySouth China Normal UniversityGuangzhou 510006China Institute for Superconducting and Electronic Materials Australian Institute for Innovative MaterialsUniversity of WollongongInnovation CampusSquires WayNorth WollongongNSW 2522Australia Department of Mechanical and Aerospace Engineering and Department of ChemistryThe Hong Kong University of Science and TechnologyHong KongChina Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

p-Benzoquinone(BQ)is a promising candidate for next-generation sodium-ion batteries(SIBs)because of its high theoretical specific capacity,good reaction reversibility,and high resource ***,practical application of BQ faces many challenges,such as a low discharge plateau(~2.7 V)as cathode material or a high discharge plateau as anode material compared with inorganic materials for SIBs and high solubility in organic electrolytes,resulting in low power and energy ***,tetrahydroxybenzoquinone tetrasodium salt(Na_(4)C_(6)O_(6))is synthesized through a simple neutralization reaction at low *** four-ONa electron-donating groups introduced on the structure of BQ greatly lower the discharge plateau by over 1.4 V from ~2.70 V to ~1.26 V,which can change BQ from cathode to anode material for *** the same time,the addition of four-ONa hydrophilic groups inhibits the dissolution of BQ in the organic electrolyte to a certain *** a result,Na_(4)C_(6)O_(6) as the anode displays a moderate discharge capacity and cycling performance at an average work voltage of ~1.26 V versus Na/Na^(+).When evaluated as a Na-ion full cell(NIFC),a Na_(3)V_(2)(PO_(4))_(3)||Na_(4)C_(6)O_(6) NIFC reveals a moderate discharge capacity and an average discharge plateau of ~1.4 *** research offers a new molecular structure design strategy for reducing the discharge plateau and simultaneously restraining the dissolution of organic electrode materials.

关键词： discharge plateau electron-donating groups dissolution sodium-ion batteries

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Distributed Communication-Sliding Mirror-Descent Algorithm for Nonsmooth Resource Allocation Problem

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Journal of Systems Science & Complexity 2022年第4期35卷 1244-1261页

作者： WANG Yinghui tu Zhipeng QIN Huashu School of Automation and Electrical Engineering University of Science and Technology BeijingBeijing100083China Key Lab of Systems and Control Academy of Mathematics and Systems ScienceBeijing100190China University of Chinese Academy of Sciences Beijing100190China

This paper considers a distributed nonsmooth resource allocation problem of minimizing a global convex function formed by a sum of local nonsmooth convex functions with coupled constraints.A distributed communication-efficient mirror-descent algorithm,which can reduce communication rounds between agents over the network,is designed for the distributed resource allocation *** employing communication-sliding methods,agents can find aε-solution in O(1/ε)communication rounds while maintaining O(1/ε^(2))subgradient evaluations for nonsmooth convex functions.A numerical example is also given to illustrate the effectiveness of the proposed algorithm.

关键词： Distributed resource allocation problem mirror-descent algorithm nonsmooth functions

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Reconfigurability evaluation method for input-constrained control systems

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Journal of Systems Engineering and Electronics 2021年第5期32卷 1023-1030页

作者： tu Yuanyuan WANG Dayi LI Wenbo Beijing Institute of Control Engineering China Academy of Space TechnologyBeijing 100190China Beijing Institute of Spacecraft System Engineering China Academy of Space TechnologyBeijing 100190China

This paper proposes a quantitative reconfigurability evaluation method for control systems with actuator saturation and additive faults from the perspective of system *** the saturated feedback law in the convex hull of a group of auxiliary linear controls,the sufficient reconfigurability conditions for the system under additive faults are derived using invariant *** conditions are then expressed as linear matrix inequalities(LMIs)and applied to quantify the degree of reconfigurability for the fault *** largest fault magnitude for which the system can be stabilized,the largest initial state domain from which all the trajectories are convergent,and the minimum final state domain to which the trajectories will converge are *** effectiveness of the proposed method is illustrated through an application example.

关键词： control reconfigurability additive fault actuator saturation invariant set fault-tolerant control

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Wetting behaviors and interfacial characteristics of molten Al_(x)CoCrCuFeNi high-entropy alloys on a WC substrate

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Journal of Materials Science & Technology 2021年第19期78卷 192-201页

作者： Wenyan Luo Yunzhong Liu Cheng tu Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic Materials South China University of TechnologyGuangzhou510641China National Engineering Research Center of Near-net-shape Forming for Metallic Materials South China University of TechnologyGuangzhou510641China

The wettability of molten Al_(x)CoCrCuFeNi(x is from 0 to 1.5,mol.%)high-entropy alloys(HEA)on a WC substrate was measured using a modified sessile drop method at 1823 K in an argon *** wetting behaviors and interfacial characteristics between HEAs and WC were *** wettability with final equilibrium contact angles of 0.5°-4.6°is obtained,and addition of Al deteriorates the wettability of the *** wetting of Al_(x)CoCrCuFeNi/WC system can be roughly divided into an initially sharp spreading stage and a subsequent steady-state *** the first stage,the adsorption of Cr atoms at the solid-liquid interface primarily contributes to the wetting,and the contact angle drastically ***,both the wetting behavior and interfacial microstructure are determined by the Al content of the HEA in the next *** x≤0.5,the wetting is mainly driven by the dissolution of WC,although a few reaction products of(W,Cr)_(2)C are ***,an obvious dissolution pit appears at the surface of the *** the Al content of x≥1,the interfacial reaction is dominant in competition with the dissolution of WC,and massive reaction products precipitate at the HEA/WC interface,which leads to the formation of a continuous reaction layer.

关键词： Wetting High-entropy alloy Interface Microstructure tungsten carbide

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Hydrogen storage properties of non stoichiometric AB_2-type metal hydride

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中国有色金属学会会刊：英文版 2000年第3期10卷 289-293页

作者： tu Hai ling(屠海令), HUANG Zhuo(黄倬), GAO Hui long(高会龙), zhan Feng(詹锋) Beijing General Research Institute for Non ferrous Metals, Beijing 100088, P.R.China 北京有色金属研究总院北京

Hydrogen storage properties of non stoichiometric AB 2 type alloys, Ti 0.8 Zr 0.2 (MnCrVFe) 2- x ( x =0, 0.1, 0.2, 0.3), have been studied. The results show that the structures of the substoichiometric alloys can be described using the replacement model, that is, some A side atoms occupy the primary B side atom positions. The equilibrium pressures of the alloys decrease gradually and the hysteresis effect between hydriding and dehydriding process decreases with the increase of x value. The free energy change (Δ G ) between hydriding and dehydriding process has a significant effect on the hysteresis of the alloys. The p c t plateau region becomes narrow and the reversible hydrogen capacity decreases with the increase of x value ( x >0.1), although the hydrogen absorption capacity increases. The alloy with x =0.1 shows the optimum hydrogen storage properties.

关键词： hydrogen storage property substoichiometric alloy hysteresis effect

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Shuffled Mutation Glowworm Swarm Optimization and Its Application

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Chinese Journal of Electronics 2019年第4期28卷 822-828页

作者： WANG Hongbo REN Xuena tu Xuyan School of Computer and Communication Engineering Beijing Key Lab of Knowledge Engineering for Materials ScienceUniversity of Science and Technology Beijing Institute of Information Engineering Chinese Academy of Sciences

If the glowworm individual has no memory during its movement, and the decision of next direction is limited to its current position. It is precisely these reasons mentioned above that make the basic Glowworm Swarm Optimization easy to trap into the local optimum. In order to solve the problem, this paper suggests a Shuffled mutation glowworm swarm optimization(SMGSO), which combines the thought of Shuffled Frog Leaping with Glowworm Swarm Optimization. Making use of a grouping idea of Shuffled Mutation, the glowworm swarm is divided into several subgroups. The location updating of each individual is not only influenced by the brightest node in neighbour scope, but also by the brightest one in their local subgroup, meanwhile the locations of those isolated nodes are updated by the difference mutation of the global optimum and local optimal. In group shuffling stage, an orthogonal strategy can guide the whole population to generate their offspring. The performance of this proposed approach is examined by well-known10 benchmark functions, and its obtained results are compared with what other variants hold. The experimental analysis show that the Shuffled mutation glowworm swarm optimization is effective and outperforms other variants in terms of solving multi-modal function optimization problems, and the proposed approach can improve the positioning accuracy of the centroid localization.

关键词： Orthogonal strategy Shuffled frog leaping Wireless sensor centroid location

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