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Chinese Journal of Aeronautics 2022年第4期35卷 461-472页

作者： Yan LIU Jia LIU Di ZHU Hao WANG College of mechanical and electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China

A metallic interconnect plate with a flow channel array is one of the most important elements in a solid oxide fuel cell(SOFC). Electrochemical machining(ECM) is considered to be an adoptable technology for fabricating flow channels in an interconnect plate on account of its efficiency and low cost. With respect to the traditional electrolyte flow mode in ECM cross-channel array, the electrolyte usually flows from one side to the opposite side of the rectangular processing area. However, obvious flow marks are typically formed at the bottom of channels perpendicular to the flow. According to multiphysical simulation analysis, the low electrolyte velocity in the channels perpendicular to the flow leads to uneven distribution of electrolyte products. To improve the uniformity of the flow field, two new electrolyte flow modes, “two-in and two-out” and “three-in and one-out”, are proposed. By adding one or two additional electrolyte inlets to the sides of the traditional flow field, the electrolyte flow velocity in the channels perpendicular to the traditional flow will be increased. Corresponding simulations and experiments were performed and the results showed that the “three-in and one-out” flow mode can produce a flatter bottom surface for the cross-channel array. Parameter optimization experiments for the preferred flow mode were undertaken and the optimal flow field parameters were determined.

关键词： Cross-channel array Dynamic simulation Electrochemical machining Flow field Interconnect plate

The Dissemination, Influence, and Reception of the Modern Western Translation Theories in China

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海外英语 2017年第20期 142-143页

作者：蒋丽平 guangdong mechanical&electrical Polytechnic

Modern Western translation theories have exerted a great influence upon the Chinese translation fields. The author of the present paper believes that science has no boundaries and nationality. It is advisable and necessary to learn and absorb what we do not know and then make the best use of the knowledge. The author tries to analyze what the western translation theories have brought to us, the advantages and disadvantage of them, and finally put forward the possible attitude we may take to the western translation theories.

关键词： modern Western translation theories Chinese translation theory translation study

INVESTIGATION ON NEW TYPE OF DOUBLY BLENDING ABRASIVE WATER JET NOZZLE SYSTEM WITH HIGHER PERFORMANCE

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Chinese Journal of mechanical Engineering 2006年第3期19卷 417-420页

作者： ZHU Pailong ZHOU Jinjin TANG Dianbo Department of mechanical and electrical Engineering Guangdong Industry Technical College Guangzhou 510300 China School of mechanical Engineering Dalian University of Technology Dalian 116023 China Research and Development Center Guangzhou Hitachi Escalator Co. Ltd Guangzhou 510430 China

Based on the two existing abrasive water-jet（AWJ） systems, the dia-jet （or pre-jet） and the post-jet, a new type of abrasive water-jet system is put forward, which combines the dia-jet＇s advantage, low operating system pressure, slender stream jet, and more concentrative abrasive in the blended stream, with merits of post-jet, the less sophisticate apparatus, successive supply of abrasives. The theoretic analysis is brought out in detail, and the nozzle system structure is concisely illustrated. Its relevant experiment results are demonstrated, proving that this new system is effective in various aspects, enlarging penetrating capability without raising system pressure, saving machining power supply, lessening energy loss, etc.

关键词： Abrasive water-jet(AWJ) Cutting performance Doubly blending tube Dia-jet System Post-jet system Energy efficiency

A quasi-zero-stiffness isolator with a shear-thinning viscous damper

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Applied Mathematics and Mechanics(English Edition) 2022年第3期43卷 311-326页

作者： Guilin WEN Yu LIN Junfeng HE School of mechanical and electrical Engineering Guangzhou UniversityGuangzhou 510006China School of mechanical Engineering Yanshan UniversityQinhuangdao 066004Hebei ProvinceChina

Quasi-zero-stiffness(QZS)vibration isolators have been widely studied,because they show excellent high static and low dynamic stiffnesses and can effectively solve low-frequency and ultralow-frequency ***,traditional QZS(T-QZS)vibration isolators usually adopt linear damping,owing to which achieving good isolation performance at both low and high frequencies is difficult.T-QZS isolators exhibit hardening stiffness characteristics,and their vibration isolation performance is even worse than that of linear vibration isolators under a large excitation ***,this study proposes a QZS isolator with a shear-thinning viscous damper(SVD)to improve the vibration isolation performance of the T-QZS *** force-velocity relation of the SVD is obtained,and a dynamic model is established for the *** dynamic responses of the system are solved using the harmonic balance method(HBM)and the Runge-Kutta *** vibration isolation performance of the system is evaluated using force transmissibility,and the isolator parameters are *** results show that compared with the T-QZS isolators,the proposed QZS-SVD isolator achieves the lower initial vibration isolation frequency and peak value,and exhibits better vibration isolation performance at medium and high ***,the proposed isolator can withstand a large excitation amplitude in the effective vibration isolation range.

关键词： quasi-zero-stiffness(QZS)isolator shear-thinning viscous damper(SVD) vibration isolation force transmissibility

electrical and optical characteristics of atmospheric helium jet array plasma

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Plasma Science and Technology 2019年第11期21卷 38-44页

作者： Jingjing LIU Dong CHEN Yijian MO Yi RONG College of mechanical and electrical Engineering Guangzhou UniversityGuangzhou 510006People’s Republic of China

In this paper,a honeycomb structure jet array with seven jet units was adopted to generate *** the average discharge power and the emission intensity of the main excited species increase with increasing applied *** are three stages of discharge evolution at different applied voltages:initial discharge,uniform discharge and strong coupling *** spatial distribution of the emission intensity of the excited species can be divided into three categories:growth class,weakening class and variation *** gas temperature along the whole plasma plume at different applied voltages is maintained at around 320 K and can be widely used in heat-labile applications.

关键词： jet array plasma discharge evolution spatial distribution heat-labile application

Three-dimensional fuzzy logic system for process modeling and control

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控制理论与应用（英文版） 2010年第3期8卷 280-285页

作者： Han-Xiong LI Xiaogang DUAN Zhi LIU Department of Manufacturing Engineering and Engineering Management City University of Hong Kong Hong Kong China School of mechanical and electrical Engineering Central South University Changsha Hunan 410083 China School of Automation Guangdong University of Technology Guangzhou Guangdong 510006 China

The traditional fuzzy logic system （FLS） can only model and control the process in two-dimensional nature. Many of real-world systems are of multidimensional features, such as, thermal and fluid processes with spatiotemporal dynamics, biological systems, or decision-making processes that contain stochastic and imprecise uncertainties. These types of systems are difficult for the traditional FLS to model and control because they require a third dimension for spatial or probabilistic information. The type-2 fuzzy set provides the possibility to develop a three-dimensional fuzzy logic system for modeling and controlling these processes in three-dimensional nature.

关键词： Three-dimensional fuzzy logic system Spatiotemporal system Modeling

Microstructure and Properties of Micro-Alloyed Mg-2.0Nd-0.2Sr by Heat Treatment and Extrusion

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Acta Metallurgica Sinica(English Letters) 2023年第2期36卷 323-334页

作者： Zhenzhen Gui Fan Jiang Zhixin Kang Fan Zhang Zu Li Jianhui Zhang School of mechanical and electrical Engineering Guangzhou UniversityGuangzhou510006China Joint Institute of Guangzhou University and Institute of Corrosion Science and Technology Guangzhou UniversityGuangzhou510006China guangdong Key Laboratory for Advanced Metallic Materials Processing School of Mechanical and Automotive EngineeringSouth China University of TechnologyGuangzhou510640China

Magnesium(Mg)and its alloys have broad application prospects in the fields such as biomedical materials and automobile manufacturing.A micro-alloyed Mg-2.0Nd-0.2Sr(wt.%)magnesium alloy is designed and obtained through semicontinuous *** evolution of microstructures and tensile properties are investigated with different heat treatments and extrusion *** grain sizes decrease significantly after extrusion,thus changing the fracture mode during the tensile testing *** ultimate tensile strength(UTS),yield strength(YS)and elongation(EL)of the properly processed extrusion alloy(referred to as MNS-E2)reach to 247 MPa,228 MPa and 24%,*** dramatical improvement of mechanical properties results from the refined grains and interactions between dislocations and *** nanoparticle bands blocking the slippage and movement of dislocations are also found in the MNS-E2 *** above causes combined result in an integrated effect of grain boundary strengthening,dislocation strengthening,precipitation strengthening and nanoparticle band *** contribution of strengthening mechanisms of MNS-E2 alloy consists of grain boundary with around 96 MPa,dislocations with around 3.4 MPa,precipitation strengthening with around 45 MPa and the nanoparticle band with around 18 MPa,respectively.

关键词： Mg-Nd-Sr alloy Hot extrusion mechanical properties Strengthening mechanisms

MSCNN-LSTM Model for Predicting Return Loss of the UHF Antenna in HF-UHF RFID Tag Antenna

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Computers, Materials & Continua 2023年第5期75卷 2889-2904页

作者： Zhao Yang Yuan Zhang Lei Zhu Lei Huang Fangyu Hu Yanping Du Xiaowei Li School of mechanical and electrical Engineering Beijing Institute of Graphic CommunicationBeijing102600China Postal Industry Technology R&D Center Beijing Institute of Graphic CommunicationBeijing102600China collage of Electronic Information and Automation Civil Aviation University of ChinaTianjin300300China

High-frequency(HF)and ultrahigh-frequency(UHF)dual-band radio frequency identification(RFID)tags with both near-field and farfield communication can meet different application ***,it is time-consuming to calculate the return loss of a UHF antenna in a dualband tag antenna using electromagnetic(EM)*** overcome this,the present work proposes a model of a multi-scale convolutional neural network stacked with long and short-term memory(MSCNN-LSTM)for predicting the return loss of UHF antennas instead of EM *** the proposed MSCNN-LSTM,the MSCNN has three branches,which include three convolution layers with different kernel sizes and ***,MSCNN can extract fine-grain localized information of the antenna and overall *** LSTM can effectively learn the EM characteristics of different structures of the antenna to improve the prediction accuracy of the *** results show that the mean absolute error(0.0073),mean square error(0.00032),and root mean square error(0.01814)of theMSCNNLSTM are better than those of other prediction *** predicting the return loss of 100UHFantennas,compared with the simulation time of 4800 s for High Frequency Structure Simulator(HFSS),MSCNN-LSTM takes only 0.927519 s under the premise of ensuring prediction accuracy,significantly reducing the calculation time,which provides a basis for the rapid design of HF-UHF RFID tag ***-LSTM is used to determine the dimensions of the UHF antenna *** return loss of the designed dualband RFID tag antenna is−58.76 and−22.63 dB at 13.56 and 915 MHz,respectively,achieving the desired goal.

关键词： HF-UHF RFID tag antenna multi-scale convolutional neural network long-short term memory return loss

Study on the Development Mechanism and Current Situation of Industrial Tourism——Taking Guangzhou as an Example

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Study on the Development Mechanism and Current Situation of ...

Regulating the radical intermediates by conjugated units in covalent organic frameworks for optimized lithium ion storage

作者： Lan Chen guangdong mechanical and electrical Polytechnic

From the perspective of post-industrial society, the development of industrial tourism as a new type of tourism industry is mainly driven by the internal driving force of tourism industry, the pulling force of tourism market, and the support of social environment catalysis and technological development. Based on the analysis of several examples of industrial tourism in Guangzhou, it can be seen that the development of tourism products with industrial characteristics by enterprises can be recognized by the market. The successful introduction of industrial tourism products not only improves its brand and image, but also opens up new profit channels for enterprises.

关键词： Industrial tourism Post-industrial society Guangzhou

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Journal of Energy Chemistry 2022年第6期31卷 428-433,I0012页

作者： Shuai Gu Xiaoxia Ma Jingjing Chen Rui Hao Zhiqiang Wang Ning Qin Wei Zheng Qingmeng Gan Wen Luo Muqing Li Zhiqiang Li Kemeng Liao Hao Guo Guiyu Liu Kaili Zhang Zhouguang Lu Department of Materials Science and Engineering Shenzhen Key Laboratory of Interfacial Science and Engineering of MaterialsGuangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and DevicesSouthern University of Science and TechnologyShenzhen 518055GuangdongChina Department of mechanical Engineering City University of Hong KongKowloonHong Kong 999077China

Organic active units often transform into radical intermediates during the redox processes but exhibit poor cycling stability due to the uncontrollable redox of the radicals. Herein, we report a facile and efficient strategy to modulate the molecular orbital energies, charge transport capacities, and spin electron densities of the active units in covalent organic frameworks(COFs) via regulating the conjugated unit size to optimize the redox activity and stability of the organic radicals. COFs based on different imide conjugated units exhibit tunable discharge voltages, rate performance and cycling stabilities. Detailed characterizations and theoretical calculation reveal that imide radicals are the important active intermediates during the redox processes of these COFs. Specifically, increasing the size of the imide conjugated units could effectively delocalize the radical electrons and improve the stability of the COFs electrodes. This study offers a very effective strategy to modulate the redox chemistry of organic materials for electrochemical energy storage.

关键词： Organic electrodes Radical intermediates Covalent organic frameworks