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Optimization Mechanism of Mechanical Properties of Basalt Fiber-Epoxy Resin Composites by Interfacially Enriched Distribution of Nano-Starch Crystals

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Chinese Journal of Mechanical Engineering 2024年第3期37卷 289-296页

作者： Yanpeng Wei jiale zhao Jian Zhuang Peng Zhang Zhiwu Han College of Biological and Agricultural Engineering Jilin UniversityChangchun 130025China Key Laboratory of Bionics Engineering Ministry of EducationJilin UniversityChangchun 130025China Weichai Lovol Heavy Industry Co. LTDWeifang 261031China

Fibre reinforced polymer composites have become a new generation of structural materials due to their unique advantages such as high specific strength,designability,good dimensional stability and ease of large-area monolithic ***,the problem of interfacial bonding between the resin matrix and the fibres limits the direct use of reinforcing fibres and has become a central difficulty in the development of basalt fibre-epoxy *** paper proposes a solution for enhancing the strength of the fibre-resin interface using maize starch nanocrystals,which are highly yield and ***,in this paper,corn starch nanocrystals(SNC)were prepared by hydrolysis,and were deposited on the surface of basalt fibers by electrostatic *** that,in order to maximize the modification effect of nano-starch crystals on the interface,the basalt fiber-epoxy resin composite samples were prepared by mixing in a pressureless molding *** test results shown that the addition of basalt fibers alone led to a reduction in the strength of the *** of 0.1 wt%SNC on the surface of basalt fibers can make the strength consistent with pure epoxy *** the adsorption amount of SNC reached 0.5 wt%,the tensile strength of the samples was 23.7%higher than that of pure epoxy *** is due to the formation of ether bond homopolymers between the SNC at the fibre-epoxy interface and the epoxy resin,which distorts the originally smooth interface,leading to increased stress concentration and the development of *** enhances the binding of basalt *** conclusions of this paper can provide an effective,simple,low-cost and non-polluting method of interfacial enhancement modification.

关键词： Basalt fibres Epoxy resin Fibre reinforced composites Starch nanocrystals Eco-friendly

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Screening and impurity removal device to improve the accuracy of moisture content detection device for rice

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International Journal of Agricultural and Biological Engineering 2022年第6期15卷 113-123页

作者： Han Tang Changsu Xu jiale zhao Yijia Wang College of Engineering Northeast Agricultural UniversityHarbin 150030China College of Biological and Agricultural Engineering Jilin UniversityChangchun 130025China Department of Industrial and Manufacturing Systems Engineering The University of Hong KongPokfulam Road 999077China

An online detection device that used the capacitance method to detect the moisture content of rice in a combine harvester was designed and found a low detection accuracy because of the high impurity content of the *** solve this problem,a screening and impurity removal device was designed in this study,and the structural parameter range of the screw conveyor was the focus of the *** determine the best structural parameters and operating parameters of the device,models of rice grains and short stems were established by the discrete element *** Discrete Element Method(DEM)simulation test was carried out according to the Box-Behnken response surface *** the rotating speed was 300 r/min,the diameter of spiral blade was 146 mm,the pitch was 80 mm,the diameter of rotating shaft was 30.6 mm,and the minimum impurity content was 0.27%.The density distributions and movement characteristics of the rice grains and short stems in the optimized screening and impurity removal device were *** experiment was carried out to compare data for the moisture content of rice measured by the online moisture content detection device before and after the installation of the screening and impurity removal device and the results of the 105°C drying *** results showed that the impurity content of rice ranged from 0.26%to 0.37%,and the maximum effective screening rate was 90.99%after *** screening and impurity removal device significantly reduced the error in the moisture content measured by the online detection device,the error range was 0.12%-2.55%.This study provides a method for accurate online detection of moisture content and provides a reference for the design and simulation of related screening devices.

关键词： combine harvester parameter optimization rice motion characteristics discrete element model

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Design of bionic locust mouthparts stubble cutting device

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International Journal of Agricultural and Biological Engineering 2020年第1期13卷 20-28页

作者： jiale zhao Mingzhuo Guo Yun Lu Dongyan Huang Jian Zhuang College of Biological and Agricultural Engineering Jilin UniversityChangchun 130022China The Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun 130022China

Given the technical problems of low maize stubble breaking efficiency,large cutting torque and high power consumption faced during springtime no-till planting in Northeast China,we designed a high-performance coupling bionic stubble cutting device capable by integrating the structure(multi-segment and serrate)and cutting mode(isokinetic and symmetrical)of locust *** of bionic construction,mechanism design,theoretical analysis,parameter optimization,Arduino systems and intelligent control were combined to design a planetary gear mechanism and an intelligent speed control *** particular,the bionic cutting blade could reconstruct the multi-segment and serrate structure of locust mouthparts,while the planetary gear mechanism and the intelligent speed control system jointly comprised the bionic drive system,which could simulate the isokinetic and symmetrical cutting mode,thereby bionically coupling morphological structures and movement *** of comparative tests showed the coupling bionic cutting device could reduce the cutting torque by 26.6%-31.6%and the power consumption by 21.9%-26.1%.This work confirmed that coupling bionic method can significantly improve the stubble cutting efficiency,which was a valuable contribution to the design of stubble cutting device for no-till planter.

关键词： bionics locust mouthparts cutting device corn stubble

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Analysis and experiment on cutting performances of high-stubble maize stalks

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International Journal of Agricultural and Biological Engineering 2017年第1期10卷 40-52页

作者： zhao jiale Huang Dongyan Jia Honglei Zhuang Jian Guo Mingzhuo College of Biological and Agricultural Engineering Jilin UniversityChangchun 130025China Key Laboratory of Bionics Engineering Ministry of EducationJilin UniversityChangchun 130025China

In the cold areas of Northeast China,maize high-stubble cutting is a novel stalk conservation tillage method,in which the maize stalks are under a unilaterally-fixed no-support cutting ***,reducing the cutting resistance and power consumption of maize stalks under this status is very significant for the development of high-efficiency high-stubble cutting *** on a self-designed testing system that highly restored the maize high-stubble cutting conditions and by means of experimental design and mathematic statistics,the effects of working parameters(blade angle,blade shape,cutting speed and cutting angle)on the maximum cutting resistance and power consumption were *** analyzing stress conditions during the stalk cutting process,six mathematic models were built to express the relationships between individual factors and the maximum cutting resistance or cutting power *** model optimization,the parameter combination for optimal cutting performance of maize stalks under unilaterally-fixed no-support cutting status was obtained:blade angle is 18°,blade shape is isosceles triangle,cutting speed is 9.5 m/s,and cutting angle is 75°.Field validation experiments under this parameter combination showed that the maximum cutting resistance was(55.23±3.50)N(declined by 11.04%),and power consumption was(11.41±1.04)J(declined by 16.65%).The research findings can be a reference for the design and development of maize high-stubble cutting devices.

关键词： cutting performances blade angle working parameters high-stubble conservation tillage mechanism analysis maize

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A Deep Deterministic Policy Gradient-Based Method for Enforcing Service Fault-Tolerance in MEC

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Chinese Journal of Electronics 2024年第4期33卷 899-909页

作者： Tingyan LONG Peng CHEN Yunni XIA Yong MA Xiaoning SUN jiale zhao Yifei LYU College of Computer Science Chongqing University School of Computer and Software Engineering Xihua University School of Computer and Information Engineering Jiangxi Normal University School of Computer and Information Science Chongqing Normal University

Mobile edge computing(MEC) provides edge services to users in a distributed and on-demand *** to the heterogeneity of edge applications, deploying latency and resource-intensive applications on resourceconstrained devices is a key challenge for service providers. This is especially true when underlying edge infrastructures are fault and error-prone. In this paper, we propose a fault tolerance approach named DFGP, for enforcing mobile service fault-tolerance in MEC. It synthesizes a generative optimization network(GON) model for predicting resource failure and a deep deterministic policy gradient(DDPG) model for yielding preemptive migration *** show through extensive simulation experiments that DFGP is more effective in fault detection and guaranteeing quality of service, in terms of fault detection accuracy, migration efficiency, task migration time, task scheduling time,and energy consumption than other existing methods.

关键词： Fault tolerance Multi-access edge computing Processor scheduling Fault detection Image edge detection Fault tolerant systems Quality of service

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Land Use Effects on the Distribution and Speciation of Heavy Metals and Arsenic in Coastal Soils on Chongming Island in the Yangtze River Estuary, China

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Pedosphere 2016年第1期26卷 74-84页

作者： ZHENG Rong zhao jiale ZHOU Xiu MA Chao WANG Li GAO Xiaojiang Department of Environmental Science and Engineering Fudan University Center of Analysis and Measurement Fudan University

The reclamation of tidal fiats has been one of the important approaches to replenish the arable lands in the coastal areas; pollution status of reclaimed soils has received wide attention recently, especially for the study of heavy metals due to the relative high pollutant concentrations in wetlands. To understand the impact of land use change on heavy metal and arsenic （As） geochemistry by the reclamation of wetlands for agriculture, surface soils and soil profiles were collected from the agricultural land reclaimed in the 1990s and the intertidal flat wetland at Dongtan on Chongming Island in the Yangtze River Estuary, China. The soil samples were analyzed for total concentrations and chemical speciation of chromium （Cr）, zinc （Zn）, copper （Cu）, lead （Pb）, nickel （Ni）, cadmium （Cd） and As using inductively coupled plasma mass spectrometry （ICP-MS）. Results showed that soil properties （salinity, total organic carbon and grain-size distribution） and the concentrations of heavy metals and As in the soils differed under the different land use types. The conversion of wetland to forest had caused obvious losses of all the measured heavy metals. In paddy field and dryland with frequent cultivation, the concentrations of Cr, Zn, Cu, Ni and As were higher when compared to forest land which was disturbed rarely by human activities. Speciation analysis showed that Cr, Zn, Cu, Ni and As were predominated by the immobile residual fraction, while Pb and Cd showed relatively higher mobility. In general, metal （except Ni） and As mobility decreased in the following order： wetland 〉 dryland 〉 paddy field 〉 forest land, which suggested that the reclaimed soils had lower metal and As mobility than the intertidal fiat wetland. The results of this study contribute to a better understanding of the effects of land use on heavy metals and As in the reclaimed soils of the study area and other similar coastal areas.

关键词： chemical fraction dryland forest land intertidal flat paddy field reclaimed soils wetland

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Design and experiment of bionic stubble breaking-deep loosening combined tillage machine

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International Journal of Agricultural and Biological Engineering 2021年第4期14卷 123-134,I0002页

作者： jiale zhao Yun Lu Mingzhuo Guo Jun Fu Yijia Wang College of Biological and Agricultural Engineering Jilin UniversityChangchun 130025China Key Laboratory of Bionics Engineering Ministry of EducationJilin UniversityChangchun 130025China Department of Industrial and Manufacturing Systems Engineering The University of Hong KongPokfulam RoadHong KongChina

Under the conditions of straw returning operation,there are three major technical bottlenecks in the Phaeozem region of northeast China,namely low stubble breaking rate,poor tillage depth consistency,and high fuel *** this research,a bionic stubble-deep loosening combined tillage machine(BSD)was designed through bionic prototype analysis,coupled bionic analysis,coupled bionic design,theoretical analysis and application of intelligent control *** consists of a bionic stubble breaking device and a bionic self-excited vibratory deep loosening *** on the unique biting pattern of locust mouthparts on maize rootstocks,the bionic stubble breaking device adopted a new multi-segment serrated bionic structure and a symmetrical rotational motion,which could significantly increase the stubble breaking rate(p<0.05)and reduce the resistance to stubble breaking operations(p<0.05).Based on the unique biology of the hare’s paws,toes and nails,the bionic self-excited vibration deep loosening device adopted a new series-parallel composite bionic elastic system and an intelligent tilling depth control system with a fuzzy algorithm,which significantly improved the tilling depth consistency(p<0.05).The operational performance of the BSD was verified at different operating speeds through comparative experiments and reveals the mechanism of its excellent performance through theoretical *** final experiment results showed that,at the same operating speed,the BSD improved the stubble breaking rate by 9.62%and 10.67%,reduced the stubble breaking torque by 28 N·m and 33 N·m,reduced the tillage depth coefficient of variation by 12.73%and 13.48%,and reduced the specific fuel consumption by 36 g/km·h and 40 g/km·h compared to the two most common *** operating performance of the three kinds of machines will decrease with the increase of operating speed,and the BSD has the least decrease.

关键词： bionics stubble breaking deep loosening combined tillage machine

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Friction wheel transmission of no-tillage corn planters

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International Journal of Agricultural and Biological Engineering 2017年第4期10卷 87-97页

作者： Jia Honglei Zhang Zhuo Chen Zhi Zheng Tiezhi zhao jiale Guo Mingzhuo College of Biological and Agricultural Engineering Jilin UniversityChangchun 130025China Key Laboratory of Bionics Engineering Ministry of EducationJilin UniversityChangchun 130025China China National Machinery Industry Corporation Beijing 100080China Jilin Agricultural Mechanization Management Center Changchun 130022China

To overcome the unfavorable factors of ground wheel-driven chain transmission when a no-tillage planter operates on straw mulching fields,a friction wheel transmission based on ground wheel transmission was designed in this *** stability,i.e.,the effects of friction wheel tyre pressure on stability of machine transmission was investigated via validation of main *** relationships among tyre pressure,deformation and load were determined via theoretical *** tyre pressure extreme for transmission is 25.90 psi,the maximum pressure imposed on the friction wheel tyre is 14 kN,the maximum deformation of friction wheel is 8.7 *** stabilities of friction wheel slip rate and seeding distance were investigated via field tests and alteration of friction wheel tyre *** processing the test data,it can be found that the minimum tyre pressure for acquisition of friction wheel slip rate was 24.35 *** processing the data of seeding distance,it can be validated that the tyre pressure was kept unchanged following the optimal transmission effect of the transmission through the abrupt change of working speed,which further proved the feasibility of the new friction wheel *** transmission of friction wheel can reduce 14.67%in variation coefficient of seed spacing at the speed of 5 km/h,and 16.22%at the speed of 8 km/h.

关键词： no-tillage planter corn friction wheel transmission slip rate field test variation coefficient seeding distance

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Stalk cutting mechanism of no-tillage planter for wide/narrow row farming mode

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International Journal of Agricultural and Biological Engineering 2017年第2期10卷 26-35页

作者： Jia Honglei Jiang Xinming Yuan Hongfang Zhuang Jian zhao jiale Guo Mingzhuo College of Biological and Agricultural Engineering Jilin UniversityChangchun 130022China Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun 130022China

A no-tillage planter of narrow row spacing was designed according to the agronomic requirements of wide/narrow row farming mode in the black soil region of Northeast *** to the narrow spacing of the seeder unit,a gear-tooth stalk cutting mechanism was designed in order to prevent residues from blocking the *** basic parameters,number and edge curve of the stalk cutting blade were designed and ***-factor and three-level combined orthogonal experiments were conducted using the factors of working speed(1.12 m/s,1.57 m/s and 2.02 m/s),tillage depth(75 mm,90 mm and 105 mm)and cutter spacing(15 mm,30 mm and 45 mm),which significantly affected stalk cutting rate and soil disturbance *** optimal combination is the working speed of 1.62 m/s,tillage depth of 92 mm and cutter spacing of 35 *** this condition,the stalk cutting rate is more than 90%and soil disturbance rate is 7.5%-12.0%.The performance of the new no-tillage planter was tested by using the above *** results showed that the no-tillage planter of narrow row spacing came up to the relevant national standards in China.

关键词： conservation tillage no-tillage planter wide/narrow row farming stalk cutting mechanism soil disturbance rate direct sowing corn Northeast China

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Design and test of bionic wide-ridge soybean tilling-sowing machine

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International Journal of Agricultural and Biological Engineering 2019年第1期12卷 42-51页

作者： Honglei Jia Mingzhuo Guo jiale zhao Dongyan Huang Jian Zhuang Jiangtao Qi College of Biological and Agricultural Engineering Jilin UniversityChangchun 130022China Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun 130022China

The insufficient accumulated temperature of the plow layer during spring tillage in Northeast China severely restricts soybean root growth and whole-plant *** regional soil viscosity further complicates *** order to seek a solution to these problems,field comparative tests were conducted to investigate the effects of shallow-loosening(SL)and reshaping ridge(RR)on soil temperature and soybean root *** with conventional tillage(CT),SL and RR significantly increased the soil temperatures within 0-25 cm(p<0.05)and 0-15 cm(p<0.05),*** particular,higher soil temperature within 15-25 cm was established after SL than after RR(p<0.05).Additionally,SL promoted substantially more vigorous soybean development(seedling height)than RR(p<0.05),which in turn led to a significant outperformance over CT(p<0.05).Further,bionics,reverse engineering,and curve fitting were combined to design a hare claw toe bionic shallow-loosening shovel and a pangolin scale bionic ridging shovel with anti-drag *** verification tests confirmed that these two bionic tillage devices outperformed the conventional tillage device in reducing tractive drag by 13%-19%.Based on the results of these tests,a 2BGD-6(110)bionic wide-ridge soybean tilling-sowing machine was designed,which was capable of shallow-loosening,reshaping ridge and *** new machine significantly reduced the tractive drag,efficiently loosened the soil,increased soil temperature,and accelerated soybean root *** study can provide a theoretical and practical reference for soybean production in Northeast China.

关键词： bionics tillage shallow-loosening soybean reshaping ridge soil temperature

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