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A surface engineering strategy for the stabilization of zinc metal anodes with montmorillonite layers toward long-life rechargeable aqueous zinc ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 94-105页

作者： Wenbo Wang Ruifeng Xu Xu Zhang Peiyu Wang Bao Yang Bingjun Yang Juan Yang Kailimai Su Pengjun Ma Yanan Deng Xianfeng Fan Wanjun Chen Key Laboratory for Electronic Materials College of Electrical Engineering Northwest Minzu University Resource Chemistry and Energy Materials Research Center State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Institute for Materials and Processes School of Engineering University of Edinburgh

Rechargeable aqueous zinc-ion batteries （AZIBs） exhibit appreciable potential in the domain of electrochemical energy ***,there are serious challenges for AZIBs,for instance zinc dendrite growth,hydrogen evolution reaction （HER）,and corrosion side ***,we propose a surface engineering modification strategy for coating the montmorillonite （MMT） layer onto the surface of the Zn anode to tackle these issues,thereby achieving high cycling stability for rechargeable *** results reveal that the MMT layer on the surface of the Zn anode is able to provide ordered zincophilic channels for zinc ions migration,facilitating the reaction kinetics of zinc *** functional theory（DFT） calculations and water contact angle （CA） tests prove that MMT@Zn anode exhibits superior adsorption capacity for Zn2+and better hydrophobicity than the bare Zn anode,thereby achieving excellent cycling ***,the MMT@Zn||MMT@Zn symmetric cell holds the stable cycling over 5600 h at 0.5 mA cm-2and 0.125 m A h cm-2,even exceeding 1800 h long cycling under harsh conditions of 5 m A cm-2and 1.25 m A h *** MMT@Zn||V2O5full cell reaches over 3000 cycles at 2 A g-1with excellent rate ***,this surface engineering modification strategy for enhancing the electrochemical performance of AZIBs represents a promising application.

关键词： Surface engineering strategy Montmorillonite layer Protection mechanism of Zn anode Cycling stability Aqueous zinc ion batteries

Steganalysis of Low Embedding Rate CNV-QIM in Speech

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Computer Modeling in engineering & Sciences 2021年第8期128卷 623-637页

作者： Wanxia Yang Miaoqi Li Beibei Zhou Yan Liu Kenan Liu Zhiyu Hu mechanical and electrical engineering college Gansu Agricultural UniversityLanzhou730070China

To address the difficulty of detecting low embedding rate and high-concealment CNV-QIM(complementary neighbor vertices-quantization index modulation)steganography in low bit-rate speech codec,the code-word correlation model based on a BiLSTM(bi-directional long short-term memory)neural network is built to obtain the correlation features of the LPC codewords in speech codec in this ***,softmax is used to classify and effectively detect low embedding rate CNV-QIM steganography in VoIP *** experimental results show that for speech steganography of short samples with low embedding rate,the BiLSTM method in this paper has a superior detection accuracy than state-of-the-art methods of the RNN-SM(recurrent neural network-steganalysis model)and SS-QCCN(simplest strong quantization codeword correlation network).At an embedding rate of 20%and a duration of 3 s,the detection accuracy of BiLSTM method reaches 75.7%,which is higher than that of RNNSM by 11.7%.Furthermore,the average testing time of samples(100%embedding)is 0.3 s,which shows that the method can realize real-time steganography detection of VoIP streams.

关键词： CNV-QIM steganography BiLSTM steganalysis VoIP speech

Potato seed-metering monitoring and improved miss-seeding catching-up compensation control system using spatial capacitance sensor

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International Journal of agricultural and Biological engineering 2024年第4期17卷 255-264页

作者： Guanping Wang Xiaoping Yang Wei Sun Yan Liu Chengjiang Wang Hua Zhang Xiaolong Liu Bin Feng Hongling Li mechanical and electrical engineering college Gansu Agricultural UniversityLanzhouGansu 730070China

The congenital yield reduction caused by miss-seeding in spoon-type seed-metering device of small and medium-sized potato planter is *** on the physical mechanism of different measured capacitance values between two fixed capacitor plates with different media,a miss-seeding detection scheme based on a spatial capacitance sensor is proposed first.A simple and efficient spatial capacitance sensor that can obtain as large capacitance measurement value as possible is designed,and a dual CPU coordinated seed-monitoring and compensation control system architecture is ***7745 is selected for the capacitance measure of the spatial capacitance sensor,and the code of grating encoder is also recorded at the same ***,when each potato spoon passing through the space surrounded by the capacitor plates,the maximum net capacitance fluctuation and its corresponding position can be acquired.A suitable threshold can distinguish between normal-seeding and miss-seeding ***,it should be emphasized that,this monitoring system only requires one monitoring ***,based on obtained information,an improved miss-seeding catching-up compensation plan is put *** utilizing the powerful memory capability of the CPU,this system does not need to complete compensation immediately after the miss-seeding ***,the miss-seeding information and the location of the accident can be just marked in advance,and only when the opportunity arrives,can the miss-seeding catching-up compensation be truly *** this way,the position of the seed-monitoring points can be free from restriction,and the control strategy can therefore be significantly *** soil tank test data showed that,the identification accuracy of the miss-seeding detection system was not less than 94%.When the seed-metering chain speeds are 0.2,0.3,and 0.4 m/s,the average success rates of the miss-seeding compensation system are 94.32%,83.65%,and 75.00%,respectively.T

关键词： potato planter seed-metering monitoring miss-seeding spatial capacitance sensor maximum net capacitance fluctuation improved catching-up compensation

Potato planter test bed based on capacitive precision seed-monitoring and miss-seeding compensation system

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International Journal of agricultural and Biological engineering 2022年第6期15卷 104-112页

作者： Hua Zhang Wuyun Zhao Wei Sun Guanping Wang Xiaolong Liu Bin Feng Linrong Shi Yan Liu Hongling Li mechanical and electrical engineering college Gansu Agricultural UniversityLanzhouGansu 730070China

Potato seed-monitoring is the premise of its precise ***,for anti-dust,anti-vibration performance and durability,the existing photoelectric monitoring schemes have obvious congenital ***,a capacitive precision seed-monitoring idea was proposed in this *** theoretical basis is that the variation of dielectric between the capacitor plates will inevitably induce the fluctuation of the detected capacitance ***,the construction of a space capacitance sensor,and the acquisition of the net capacitance fluctuation caused by the seed spoon passing through the space area of the capacitor plates,were the core focuses of this ***,the system theory and working principle were ***,a space capacitance sensor that meets all the requirements was analyzed and *** then,its spatial arrangement was described in detail,and most important of all,the technology roadmap of the net capacitance fluctuation measurement was put *** this purpose,MAX038 and GD32F407 were selected to work together to measure the *** this way,the top value of the space capacitance when a spoon passed through the space capacitance sensor was detected,at the same time,the corresponding grating encoder information was also recorded,so,the net capacitance fluctuation of this process was *** on this result,normal-seeding,miss-seeding,and multi-seeding were *** subtly,with the cooperation of the grating encoder,the position of the seed-metering monitoring point was configured *** for miss-seeding,a predictive impact compensation concept was *** on the theories above,the software core links related to seed-monitoring and compensation control were ***,a potato planter test bed based on this study was *** the Long-7 cutting potato as test samples,it was found that,the capacitance measurement error was no higher than 0.6%;no misjudgment on miss-seeding was found,however,for

关键词： potato planter capacitive precision seed-monitoring space capacitance sensor miss-seeding compensation system

Design and experiment of an upper-side-discharge straw-returning and bundle self-unloading integrated corn residual film recycling machine

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International Journal of agricultural and Biological engineering 2023年第5期16卷 61-70页

作者： Xiaolong Liu Wuyun Zhao Hua Zhang Guanping Wang Wei Sun Fei Dai Hui Li Shanglong Xin mechanical and electrical engineering college Gansu Agricultural UniversityLanzhou 730070China

Due to the arid climate,flat terrain,certain irrigation sources and high popularization of mechanical harvest in Hexi Irrigation Area of gansu Province,the widely adopted half film-flat-mulching for corn cultivation faces serious adverse situations,such as high soil compactness,strong film-soil adhesion,significant straw stubble and thick covering accumulation on ***,a new kind of segmented combination upper-side-discharge straw-returning and bundle self-unloading integrated corn residual film recycling machine was *** scheme was characterized by small volume,low resistance,low complexity and film-impurities twice *** is constructed based on the concept of module subsection *** was composed of film surface straw cleaning device and the followed residual film recycling machine,in terms of function,any usage requirements of separate and joint operations can be *** film surface straw cleaning device is responsible for the removal of vertical corn straw and ground covering beyond the *** its stubble cutter roller obtuse-angle Lshaped blades paired single-helix arrangement is simple,it runs smoothly and the straw crushing effect is good *** layout that upper-side-discharge straw-returning cross-range screw conveyor auger is back and beyond the stubble cutter roller,eliminates the common connecting transportation mechanism between crushing and straw-returning section,so that,the system structure can be optimized and the efficiency has been significantly *** integrated residual film recycling machine is composed of triangular pyramid arc two-stage wing(TPATSW)type film lifting shovel,rod-tooth-belt type film-impurities separation device and semi-enclosed shaftless bundle film *** them,TPATSW type film lifting shovel has good corn root whisker cutting effect,low soil contact resistance and small soil congestion area,but its ability to lift film is strong,more importantly,the special seg

关键词： corn segmented combination film surface straw cleaning straw-returning TPATSW type film lifting shovel filmimpurities twice separation semi-enclosed shaftless bundle film collector self-unloading

Investigation of interaction effect between static and rolling friction of corn kernels on repose formation by DEM

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International Journal of agricultural and Biological engineering 2021年第5期14卷 238-246页

作者： Linrong Shi Xiaoping Yang Wuyun Zhao Wei Sun Guanping Wang Bugong Sun college of mechanical and electrical engineering Gansu Agricultural UniversityLanzhou 730070China

The coefficient of static friction(SF),the coefficient of rolling friction(RF)for particles are two key parameters affecting the repose angle formation and flow *** this paper,the interaction effects of SF and RF on the formation process of corn repose angle was investigated by the discrete element ***,five shape kinds of corn models(horse tooth,spherical cone,spheroid,oblate,and irregular shape)were ***,aluminum cylinder and organic glass box were used to conduct the simulation experiments with taking SF and RF as independent factors and seeing the repose angle as dependent *** on simulation results the regression equations were *** results showed the relation between two factors and the rotational kinetic energy is not nonlinear,and SF does not significantly restrict the flow of corn models after increasing the flow direction,and the effect of SF on the contact number between corns and the bottom plate is remarkable,while the effect of RF on the contact number is not ***,the interaction effect of two factors on the repose angle was analyzed by variance analysis and results showed SF and RF all have a significant impact on the repose ***,their interaction effect has an impact on the repose angle.

关键词： corn kernels coefficient of static friction coefficient of rolling friction repose angle interaction influence

Analysis of the metering performance for typical shape maize seeds using DEM

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International Journal of agricultural and Biological engineering 2023年第1期16卷 26-35页

作者： Linrong Shi Wuyun Zhao Wei Sun Xiaoping Yang Guanping Wang Shanglong Xin college of mechanical and electrical engineering Gansu Agricultural UniversityLanzhou 730070China

The irregular shape,varying internal compositions,and uneven distributions of maize seeds can degrade the metering performance of maize *** study investigates the effect of irregular maize on the performance of a high-filling-rate seed metering device using *** results show that the seed population in the seed box formed large and small cycles of seed transport due to the disturbances caused by the three *** increasing angular speed of the three wheels reduced the rate of seed filling in the seed filling regions by gravity and *** addition,an analysis of the repose angle formed by the dropped seed indicated that the angular speed of the taking seed wheel has a certain *** large angular speed reduced the coefficient of variation of the seed drop *** repose angle of the horse tooth seed was greater than those of the ***,the irregular maize seed can also reduce the coefficient of variation of the seed drop location.A comparison between the simulation and experiment results indicates the number of metering seed were basically the same.

关键词： maize seeds seed metering performance DEM verification

Effects of typical corn kernel shapes on the forming of repose angle by DEM simulation

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International Journal of agricultural and Biological engineering 2022年第2期15卷 248-255页

作者： Linrong Shi Wuyun Zhao Xiaoping Yang college of mechanical and electrical engineering Gansu Agricultural UniversityLanzhou 730070China

Corn kernel shape is an important feature to improve the accuracy of simulation results,also the repose angle is often used to calibrate model parameters in *** this study,the effects of the corn kernel shapes on the behavior during corn kernels accumulation were investigated in ***,the DEM models of three typical shapes of corn kernels were ***,the influences of the corn kernel shapes on the process of forming repose angle were investigated,such as corn kernels distance change,energy conversion,and the contact number between corn *** show that the corn kernel shape has a significant effect on the repose angle *** irregular shape of corn kernels limit their rolling when adding the corn kernel length in one or two *** addition,the irregular shapes of corn kernels increase the contact number and extend simulation *** shape corn kernels need to be mixed with irregular shape corn kernels to improve their ***,observation of the trajectory of corn kernel repose angles indicates that spherical corn kernels contact the bottom plate early,and forming small cone first,then the cone becomes bigger to change the direction of other corn kernels from top to bottom.

关键词： corn kernel shape energy conversion repose angle DEM

Motion simulation and test on threshed grains in tapered threshing and transmission device for plot wheat breeding based on CFD-DEM

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International Journal of agricultural and Biological engineering 2019年第1期12卷 66-73页

作者： Fei Dai Xuefeng Song Wuyun Zhao Zhengsheng Han Fengwei Zhang Shilin Zhang college of mechanical and electrical engineering Gansu Agricultural UniversityLanzhou 730070China

Mechanization of field experiments is the only way to improve crop breeding and seed propagation *** order to further clarify and improve the working performance of tapered threshing device for plot breeding,and reduce the remaining seeds in the device,the numerical simulation was carried out on the motion process of materials in the longitudinal-axial tapered cylinder threshing and transmission device of the plot wheat breeding combine harvester based on CFD-DEM *** results showed that,threshing and transmission of particles and short stalks at axial direction could be realized under the influence of air ***,the material transference and distribution rule and stream field distribution rule of air flow in the threshing and transmission device were obtained,the variations of velocity and displacement of particles and short stalks with time were obtained;the motion trajectories and forms of particles in different types of retention were also *** rotating speed of 1300-1600 r/min for the tapered threshing cylinder in the verification test,the particle retention rate in the enclosure was 0-0.13%,while in the simulation the particle retention rate in the enclosure was 0-0.11%,only a 0.02%difference between *** results proved a favorable feasibility to simulate the working performance of the tapered threshing and transmission device for plot breeding through gas-solid coupling method.

关键词： particle threshing and transmission tapered threshing and transmission device hydromechanics calculation discrete element numerical simulation test