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Influences of mechanized tillage and sowing modes on soil physical properties,soybean yield and economic benefits in mollisols region of Northeast China

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International Journal of Agricultural and Biological Engineering 2024年第3期17卷 130-139页

作者： haitao chen Jian Sun Yiming Zhang Jinyou Qiao College of Engineering Northeast Agricultural UniversityHarbin 150030China Heilongjiang Province Technology Innovation Center of Mechanization and Materialization of Major Crops Production Harbin 150030China College of Mechanical and Electrical Engineering East University of HeilongjiangHarbin 150066China

Appropriate mechanized straw returning and tillage sowing techniques were effective means to optimize soil physical properties and enhance agricultural productivity,as well as important measures for the conservation and restoration of mollisols region in Northeast *** the condition of full-scale maize straw returning,four mechanized tillage and sowing modes were set,including plough tillage and sowing(PTS),combined tillage and sowing(CTS),no-tillage and sowing(NTS),and no-tillage and sowing with straw mulching(NTSM).In 2020 and 2021,the study investigated the effects of different mechanized tillage and sowing modes on soil physical properties,soybean yield and economic *** results showed that during the pod-setting and pod-filling period of soybean,the NTS and NTSM treatments exhibited better effects on deep soil insulation and shallow soil moisture retention,the soil physical structure of PTS and CTS treatments were relatively *** with PTS and CTS treatments,NTS and NTSM treatments significantly increased soil gravimetric water content(SWC)by 2.35%to 7.98%in the 5-15 cm soil layer and increased soil temperature(ST)by 3.94%to 10.42%in the 25-35 cm soil layer(p0.05),the soybean yield of NTSM treatment in 2021 significantly increased by 7.30%and 5.84%over PTS and CTS treatments,*** the average annual profit per unit area of NTSM treatment increased by 12.84%,12.41%and 8.57%compared with PTS,CTS and NTS treatments,***,it was recommended to combine NTS

关键词： mechanized tillage and sowing modes full-scale straw returning soil physical properties soybean yield economic benefits mollisols conservation

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Reflection behavior of insensitive explosive detonation propagating around a cylinder

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Acta Mechanica Sinica 2024年第7期40卷 55-65页

作者： Zixuan Zhang Yuan Wang Xiaomian Hu haitao chen Institute of Applied Physics and Computational Mathematics Beijing 100094China Graduate School of China Academy of Engineering Physics Beijing 100088China

Insensitive explosive detonation has wide applications in compressing and driving inert materials,and thereby the interaction between detonation and inert materials has received more *** this paper,a two-dimensional numerical simulation based on the Euler multiphase flow framework is used to investigate the reflection behavior of the insensitive explosive detonation propagating around a *** results show that there is a critical incident angle,defined as transition angle for detonation propagating around the cylinder,below which the regular reflection(RR)on the cylinder surface is *** the incident angle is greater than the transition angle,RR changes to Mach *** transition angle is larger than that obtained by polar curve theory and the change of incident angle is used to interpret above *** addition,the influence of cylindrical radius and detonation reaction zone width on the reflection behavior is *** the cylindrical radius increases,the height of Mach stem increases while the transition angle decreases and gradually approaches the value in pole curve *** Neumann reflection is observed when the reaction zone width is relatively *** is because the energy release rate in the reaction zone is high for small reaction zone width,resulting in the formation of a series of compression waves near the cylindrical interface.

关键词： Insensitive explosive detonation Cylindrical inert material Reflection behavior

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Research and test of the measurement sensing device for the downforce of no-till planter row unit gauge wheels

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International Journal of Agricultural and Biological Engineering 2024年第2期17卷 250-259页

作者： Jiajie Shang Liyi Liu Ruifeng Zhang Hongcheng Li Shouyin Hou Hongxin Liu haitao chen College of Engineering Northeast Agricultural UniversityHarbin 150036China College of Mechanical and Electrical Engineering Suqian UniversitySuqian 223800JiangsuChina

To effectively obtain the downforce of the gauge wheels in real time,mechanical models of the interaction among the ground,gauge wheels,gauge wheel arms,and depth adjustment lever were constructed.A measuring method was proposed for monitoring the downforce through a two-dimensional radial sensing device,and a corresponding prototype was *** simulation analysis of the sensing device with ANSYS,a 45°angle was determined to exist between the strain gauge axis and the sensing device axis,and the Wheatstone bridging circuit of R1+R3−R5−R7(R stands for resistance strain gauge,different figures represent the strain gauge number)and R2+R4−R6−R8 was *** to performance and calibration tests for the sensing device,the maximum interaction effect between the X and Y axes was 2.52%,and the output signal was stable and *** standard error of the slope of the fitting equation of the downforce calculation model is *** to the field test,the average downforce of the gauge wheels was 1148,1017,843,and 713 N,at different sowing speeds of 6,8,10,and 12 km/h,*** coefficients of variation were 0.40,0.41,0.62,and 0.71,*** results indicate that the downforce fluctuation of the gauge wheels became more severe with increasing planting *** the strain simulation analysis and field test verified that the measurement method is accurate and reliable,the performance of the sensing device is stable,the measurement method and sensing device meet the application requirements and lay a foundation for the research of accurate and stable control of downforce of no-till planter.

关键词： no-till planter gauge wheel downforce two-dimensional radial force sensing device strain analysis measurement mode and method

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Sedimentary Characteristics,Ages,and Environmental Significance of Gravel Deposits and Loess in Shandong,Eastern China:Regional Response to Global Change Since the Last Glacial Period

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Acta Geologica Sinica(English Edition) 2024年第2期98卷 491-504页

作者： WANG Min KONG Fanbiao KONG Xianglun chen haitao WANG Jiawei MIAO Xiaodong JIA Guangju HAN Mei XU Shujian Department of Geography and Tourism Qilu Normal UniversityJinan 250014China School of Geography and Environment Shandong Normal UniversityJinan 250014China Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection Linyi UniversitySchool of Resources and EnvironmentLinyiShandong 276005China College of Earth Science and Engineering Shandong University of Science and TechnologyQingdaoShandong 266590China

Investigation of rarely studied gravel layers found in the loess in Shandong Province,eastern China,reveals the fabric characteristics of two gravel layers(G1,G2)and the sedimentary characteristics of loess at the typical and well-preserved Heiyu section(HY),where,to determine the paleoclimatic changes during Marine Isotope Stage *** stimulated luminescence dates of the HY formation range from 0.26±0.02 ka to 39.00±2.00 *** addition,the ages of G1 and G2 were estimated using the Bayesian model to be 39.60-40.50 and 29.00-29.50 ka.G1 and G2 are mainly composed of fine and medium gravel,both of which were subangular to subrounded limestone,with gravel directions to NE and *** average flow velocity,average depth,and flood peak flow of G1 are 1.10 m/s,0.49 m,and 37.04 m^(3)/s,respectively,calculated using the flow energy method,whereas those of G2 are 0.98 m/s,0.38 m,and 18.38 m^(3)/s,*** of climate proxy indices show that the sedimentary environment of the gravel and loess in HY might be a regional response to global change.

关键词： paleoenvironment geochronology gravel layer sedimentology Pleistocene Shandong Province

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Genome editing in plants using the TnpB transposase system

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aBIOTECH 2024年第2期5卷 225-230页

作者： Qi Li Yongqiang Wang Zhuoting Hou Hang Zong Xuping Wang Yong EZhang Haoyi Wang haitao chen Wen Wang Kang Duan School of Ecology and Environment Northwestern Polytechnical UniversityXi’an 710129China Sanjie Institute of Forage Yangling 712100China Key Laboratory of Zoological Systematics and Evolution Institute of ZoologyChinese Academy of SciencesBeijing 100101China State Key Laboratory of Stem Cell and Reproductive Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China

The widely used clustered regularly interspaced short palindromic repeats(CRISPR)/CRISPR-associated nuclease(Cas)system is thought to have evolved from IS200/IS605 *** proteins,encoded by one type of IS200/IS605 transposon,are considered to be the evolutionary ancestors of Cas12 nucleases,which have been engineered to function as RNA-guided DNA endonucleases for genome editing in bacteria and human *** nucleases,which are smaller than Cas nucleases,have been engineered for use in genome editing in animal systems,but the feasibility of this approach in plants remained ***,we obtained stably transformed genome-edited mutants in rice(Oryza sativa)by adapting three recently identified TnpB genome editing vectors,encoding distinct TnpB nucleases(ISAam1,ISDra2,and ISYmu1),for use in plants,demonstrating that the hypercompact TnpB proteins can effectively edit plant ***2 and ISYmu1 precisely edited their target sequences,with no off-target mutations detected,showing that TnpB transposon nucleases are suitable for development into a new genome editing tool for *** modifications improving the genome-editing efficiency of the TnpB system will facilitate plant functional studies and breeding programs.

关键词： ISAam1 ISDra2 ISYmu1 Plant genome editing Rice TnpB transposon endonuclease

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相干涡旋和刃型位错在海洋湍流中的相互作用

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中国激光 2024年第8期51卷 126-136页

作者：陈海涛高曾辉成都师范学院物理与工程技术学院四川成都611130 宜宾学院四川省计算物理高校重点实验室四川宜宾644000

类比相干光束中刃型位错概念,提出一种新的相干奇点——相干刃型位错。对高斯-谢尔模光束携带的相干涡旋和刃型位错在海洋湍流中的相互作用进行研究。基于扩展的惠更斯-菲涅耳原理,得到了该光束在海洋湍流环境下的交叉谱密度表达式,并... 详细信息

类比相干光束中刃型位错概念,提出一种新的相干奇点——相干刃型位错。对高斯-谢尔模光束携带的相干涡旋和刃型位错在海洋湍流中的相互作用进行研究。基于扩展的惠更斯-菲涅耳原理,得到了该光束在海洋湍流环境下的交叉谱密度表达式,并将其用于研究相干涡旋和刃型位错的相互作用。研究发现:相干刃型位错在相干涡旋的作用下发生断裂并转化成相干涡旋。在光束传输过程中,光场中有单个或成对相干涡旋的产生或湮灭现象发生。二者之间的作用特点不仅与传输距离有关,还受光束初始参数和海洋湍流参数的影响。二者之间的作用规律与自由空间光涡旋和刃型位错的作用规律不同。

关键词：激光光学奇点光学部分相干光束相干奇点相干涡旋海洋湍流

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定向毫米波网络邻居发现协议

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国防科技大学学报 2024年第1期46卷 160-169页

作者：梁仕杰赵海涛张姣陈海涛魏急波王俊芳中国电子科技集团公司第五十四研究所河北石家庄050081 国防科技大学电子科学学院湖南长沙410073

针对定向毫米波网络各节点间无波束方向先验信息导致邻居发现困难的问题,提出了一种基于盲交汇算法的邻居发现协议,推导了邻居发现过程中时隙长度、波束个数与邻居发现时间之间的理论关系。进一步,为了缩短邻居发现的时间,在盲交汇算法... 详细信息

针对定向毫米波网络各节点间无波束方向先验信息导致邻居发现困难的问题,提出了一种基于盲交汇算法的邻居发现协议,推导了邻居发现过程中时隙长度、波束个数与邻居发现时间之间的理论关系。进一步,为了缩短邻居发现的时间,在盲交汇算法的邻居发现协议的基础上,提出了基于位置预测的邻居发现协议。仿真结果表明,基于盲交汇算法的邻居发现协议的最长邻居发现时间小于无协调的定向邻居发现协议,波束个数N接近2n(2n-11,n∈Z)时,平均邻居发现时间低于无协调的定向邻居发现算法。此外,基于位置预测的邻居发现协议可以有效缩短邻居发现时间。

关键词：毫米波盲交汇邻居发现 MAC协议

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3种微生物对豆豉发酵过程中挥发性物质的影响

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食品科学 2024年第11期45卷 100-109页

作者：冯亮钟日升王书奇陈海涛北京工商大学轻工科学技术学院北京市食品风味化学重点实验室北京100048

以米曲霉菌、乳酸菌、异常威克汉姆酵母菌为发酵菌,探究3种微生物对豆豉发酵过程中挥发性物质的影响。结果表明,无接种空白组、单独接种米曲霉组、单独接种乳酸菌组、米曲霉乳酸菌混合接种组以及异常威克汉姆酵母组的总挥发性化合物含... 详细信息

以米曲霉菌、乳酸菌、异常威克汉姆酵母菌为发酵菌,探究3种微生物对豆豉发酵过程中挥发性物质的影响。结果表明,无接种空白组、单独接种米曲霉组、单独接种乳酸菌组、米曲霉乳酸菌混合接种组以及异常威克汉姆酵母组的总挥发性化合物含量分别为5 145.88、13 972.15、9 006.07、4 359.72 μg/kg以及5 169.42 μg/kg。米曲霉可增加醇类、有机酸类、酮类以及酯类物质的含量;乳酸菌可增加醇类、有机酸类的含量;米曲霉乳酸菌混合发酵可增加醇类、有机酸类的含量,但效果不如各纯种菌单独发酵;异常威克汉姆酵母可增加醇类、有机酸类的含量。与无接种空白组相比,各接种发酵组吡嗪类、酚类物质的含量均降低。综合对比,米曲霉最适合豆豉发酵,其他菌种可以辅助调节豆豉发酵过程中挥发性化合物的生成。研究结果可为我国传统风味豆豉的工业化生产提供一定的理论参考。

关键词：豆豉挥发性物质微生物发酵

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基于SAC算法的含柔性负荷电-气互联系统的频率与气压协调控制策略

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智慧电力 2024年第4期52卷 8-14页

作者：张磊光陈海涛杨军国网河南驻马店供电公司河南驻马店463000 武汉大学电气与自动化学院湖北武汉430010

现今,电燃气系统在维持微电网稳定、经济、灵活运行方面发挥着重要作用。当其受到电力与天然气负荷扰动时,控制器需要协调微电网频率和天然气管道节点的燃气压力。为此,提出1种基于柔性动作评价(SAC)算法的电-气互联系统的频率-气压协... 详细信息

现今,电燃气系统在维持微电网稳定、经济、灵活运行方面发挥着重要作用。当其受到电力与天然气负荷扰动时,控制器需要协调微电网频率和天然气管道节点的燃气压力。为此,提出1种基于柔性动作评价(SAC)算法的电-气互联系统的频率-气压协调控制策略。首先,在分析天然气管网及耦合设备运行特性的基础上,建立天然气输送动态模型。其次,基于可控负荷用户行为的随机性,建立了包括微型燃气轮机(MT),电转气(P2G)设备、可控负荷、分布式电源和负荷的微电网负载频率控制模型。此外,根据微电网频率与气压2个控制目标,设计了控制器的结构。最后,设置不同工况进行仿真,结果表明所提策略能协调系统的频率与气压。

关键词：频率控制微电网电气耦合系统 SAC算法柔性负荷

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面向视频卫星的多目标跟踪技术

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中国空间科学技术 2024年第1期44卷 144-153页

作者：陈海涛马骏李峰鹿明鲁啸天张南河南大学软件学院开封475100 中国空间技术研究院钱学森空间技术试验室北京100094 中国航天科技创新研究院先进智能算法中心北京100163

随着面阵探测器的广泛使用,面向视频卫星的多目标跟踪具有重要意义,但基于图结构的多目标跟踪方法,在图的构建中,大多数从相邻帧提取线索,而忽略了以往帧的线索。针对这个问题,提出了一个端到端的图网络框架,利用从多帧中提取的运动特... 详细信息

随着面阵探测器的广泛使用,面向视频卫星的多目标跟踪具有重要意义,但基于图结构的多目标跟踪方法,在图的构建中,大多数从相邻帧提取线索,而忽略了以往帧的线索。针对这个问题,提出了一个端到端的图网络框架,利用从多帧中提取的运动特征、外观特征、拓扑信息等多种线索,对图的节点、边和全局变量进行构建。实现这个统一框架的一个关键原则是为不同的线索和不同的来源(轨迹和检测目标)设计兼容的特征表示和图网络更新机制。该框架以前馈的方式运行,并以在线的方式进行训练。在公共数据集VISO、MOT16、MOT17基准上评测,取得了99.8%、48.8%、51.8%的多目标跟踪精度,优于其他相关多目标跟踪算法,并通过消融试验验证了各个线索对多目标跟踪性能提高的有效性,未来在智慧交通、智慧城市、军事战争等诸多领域具有广泛应用场景。

关键词：多目标跟踪视频卫星图结构时空信息运动特征外观特征

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