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The Effects of Farmyard Manure and Mulch on Soil Physical Properties in a Reclaimed Coastal Tidal flat Salt-Affected Soil

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Journal of Integrative Agriculture 2014年第8期13卷 1782-1790页

作者： ZHANG Jian-bing YANG Jing-song YAO Rong-jiang YU Shi-peng LI Fu-rong HOU Xiao-jing State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Dongtai Institute of Tidal flat Nanjing Branch of the Chinese Academy of Sciences

Careful soil management is important for the soil quality and productivity improvement of the reclaimed coastal tidal flat saline land in northern Jiangsu Province, China. Farmyard manure（ FYM） and mulch applications, which affect soil characteristics and plant significantly, are regard as an effective pattern of saline land improvement. As a conventional management in the study region, FYM and mulch are used for the amendment of the new reclaimed tidal flat regularly, but little is known about their effects on soil physical properties functioning. A study was conducted on a typical coastal tidal flat saline land, which was reclaimed in 2005, to evaluate the effects of FYM, polyethylene film mulch（PM）, straw mulch（SM）, FYM combined with PM（FYM＋PM）, FYM combined with SM（FYM＋SM）, on soil hydraulic properties and soil mechanical impedance. CK represented conventional cultivation in study area without FYM and mulch application and served as a control. The experiment, laid out in a randomized complete block design with three replications, was studied in Huanghaiyuan Farm, which specialized in the agricultural utilization for coastal tidal flat. Result showed that capillary water holding capacity（CHC）, saturated water content（SWC）, saturated hydraulic conductivity（ Ks） and bulk density（BD）, cone index（CI） were affected significantly by the FYM and mulch application, especially in the 0-10 cm soil layer. FYM and mulch management increased CHC, SWC and Ks over all soil depth in the order of FYM＋SM〉FYM＋PM〉FYM〉SM〉PM〉CK. With the contrary sequence, BD and CI decreased significantly; however, FYM and mulch application affected BD and CI only in the upper soil layers. CHC, SWC and Ks decreased significantly with the increasing of soil depth, BD and CI, and a significant liner equation was found between CHC, SWC, Ks and BD, CI. With the highest CHC（38.15%）, SWC（39.55%）, Ks（6.00 mm h-1） and the lowest BD（1.26 g cm-3） and CI（2.71 MPa）, the combined management of FYM and SM was reco

关键词： farmyard manure mulch hydraulic property soil mechanical impedance tidal flat northern Jiangsu Province

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基于忆阻器的原位卷积策略用于精确盲文识别（英文）

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Science China Materials 2024年

作者：张翔鸿覃琮尧彭文鸿秦宁浦程恩平吴建鑫范裕阳杨倩陈惠鹏 Institute of Optoelectronic Display National & Local United Engineering Lab of Flat Panel Display Technology Fuzhou University State Key Laboratory of ASIC and System School of Microelectronics Fudan University Zhicheng College Fuzhou University Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China

大数据时代下,提高信号处理效率至关重要.由于传统计算架构的计算设备中存储单元和计算单元相互分离,未来将面临着计算效率的限制.基于多电导态器件的阵列电路可实现全硬件卷积神经网络(CNNs),具备提高计算效率的潜力.然而,在处理大规...

大数据时代下,提高信号处理效率至关重要.由于传统计算架构的计算设备中存储单元和计算单元相互分离,未来将面临着计算效率的限制.基于多电导态器件的阵列电路可实现全硬件卷积神经网络(CNNs),具备提高计算效率的潜力.然而,在处理大规模卷积计算时,仍存在大量器件冗余,导致计算功耗低、计算成本高.本文创新性地提出了一种基于忆阻器的器件级原位卷积策略:以忆阻器的导电丝、掺杂面积和极化面积等的动态变化作为卷积运算过程,单个器件的电导切换所需的时间作为计算结果,通过忆阻器独特的尖峰数字信号体现卷积计算.通过忆阻器将复杂的模拟信号合理地编码为简单的数字信号,成功在单个器件上完成了卷积计算,这对于复杂信号处理和计算效率提高至关重要.在器件级原位卷积计算的基础上,本文进一步实现了盲文信号的特征识别和噪声过滤.本文所提的基于单个忆阻器的器件级原位卷积计算,将推动具有大规模卷积计算能力的复杂CNNs的构建,促进神经形态计算领域的创新和发展.

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High-precision Thickness Setting Models for Titanium Alloy Plate Cold Rolling without Tension

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Chinese Journal of Mechanical Engineering 2015年第2期28卷 422-429页

作者： WANG Xiaochen YANG Quan HE Fei SUN Youzhao XIAO Huifang National Engineering Research Center of flat Rolling Equipment University of Science and Technology Beijing

Due to its highly favorable physical and chemical properties,titanium and titanium alloy are widely used in a variety of *** of the low output of a single batch,plate cold rolling without tension is the most common rolling production method for titanium *** method is lack of on-line thickness closed-loop control,with carefully thickness setting models for precision.A set of high-precision thickness setting models are proposed to suit the production *** of frequent variations in rolling specification,a model structural for the combination of analytical models and statistical models is adopted to replace the traditional self-learning *** deformation resistance and friction factor,the primary factors which affect model precision,are considered as the objectives of statistical ***,the coefficient fitting of deformation resistance analytical model based on over-determined equations set is ***,a support vector machine（SVM）is applied to the modeling of the deformation resistance and friction *** setting models are applied to a 1450 plate-coiling mill for titanium alloy plate rolling,and then thickness precision is found consistently to be within 3%,exceeding the precision of traditional setting models with a self-learning method based on a large number of stable rolling *** application performance is *** proposed research provides a set of high-precision thickness setting models which are well adapted to the characteristics of titanium alloy plate cold rolling without tension.

关键词： titanium alloy cold rolling deformation resistance friction factor support vector machine

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用于低能耗人工视觉系统的具有互补光调制和低功耗的双极突触有机/无机异质结晶体管

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Science China Materials 2024年第5期67卷 1500-1508页

作者：刘常飞高昌松黄伟龙连敏锐许晨晖陈惠鹏郭太良胡文平 Institute of Optoelectronic Display National&Local United Engineering Lab of Flat Panel Display TechnologyFuzhou UniversityFuzhou350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350100China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou350207China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University&Collaborative InnovationCenter of Chemical Science and Engineering(Tianjin)Tianjin300072China

光电突触晶体管将光传感和突触功能集成到单个器件中,在视觉信息采集、识别、记忆和处理的神经形态计算具有显著的优势.然而,现有光电突触的权重更新主要是基于光刺激和电刺激分别调节突触的兴奋和抑制.这种方式严重限制了器件的处理速... 详细信息

光电突触晶体管将光传感和突触功能集成到单个器件中,在视觉信息采集、识别、记忆和处理的神经形态计算具有显著的优势.然而,现有光电突触的权重更新主要是基于光刺激和电刺激分别调节突触的兴奋和抑制.这种方式严重限制了器件的处理速度和应用场景.在这项工作中,我们提出了双极突触有机/无机异质结晶体管(BSOIHT),可以有效地模拟光刺激下的双向(兴奋/抑制)突触行为.此外,通过优化电极接触位置以及电极材料,晶体管的载流子注入得到了显著改善,使得突触事件功耗降至2.4 fJ.此外,采用BSOIHT构建的神经形态视觉系统,有效地促进了图像预处理,将识别准确率从44.93%大幅提高到87.01%.这为构建低能耗的人工视觉系统提供了新的途径.

关键词： photoelectric synaptic transistor artificial vision system low energy consumption bipolar heterojunction transistor

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Study and Application of Camber Control Model of Intermediate Slab in Rough Rolling

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Journal of Iron and Steel Research International 2014年第9期21卷 817-822页

作者： Hai-yu WANG Quan YANG Xiao-chen WANG Feng HE Yu-feng CHEN National Engineering Research Center of flat Rolling Equipment University of Science and Technology Beijing

In order to solve the camber problem of intermediate slab in a domestic conventional hot rolling mill, a three dimensional elastic-plastic dynamic model was built through finite element method to quantitatively calculate the influence of lateral flow factors in different entry thicknesses, reductions, reduction ratios differences on both sides and width factors. Thus, the extending difference at outlet of intermediate slab in length was transformed into thickness difference on both sides by the results, and then the tilting value of roll gap reduction to control the camber was calculated. Based on the above results, the camber control model of intermediate slab in rough rolling was estab- lished. The practical application on the rough rolling mill obtained a decent control effect, and it proved that this model had a high accuracy.

关键词： rough rolling iritermediate slab camber lateral flow factor finite element method

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Rectangular Section Control Technology for Silicon Steel Rolling

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Journal of Iron and Steel Research International 2015年第3期22卷 185-191页

作者： Xiao-chen WANG Quan YANG You-zhao SUN National Engineering Research Center of flat Rolling Equipment University of Science and Technology Beijing

Rectangular section control technology （RSCT） was introduced to achieve high-precision profile control during silicon steel rolling. The RSCT principle and method were designed, and the whole RSCT control strategy was developed. Specifically, RSCT included roll contour design, roiling technology optimization, and control strategy development, aiming at both hot strip mills （HSMs） and cold strip mills （CSMs）. Firstly, through the high-performance variable crown （HVC） work roll optimization design in the upper-stream stands and the limited shifting technology for schedule-free rolling in the downstream stands of HSMs, a hot strip with a stable crown and limited wedge, ：local spot, and single wave was obtained, which was suitable for cold rolling. Secondly, an approximately rectangular section was obtained by edge varying contact （EVC） work roll contour design, edge-drop setting control, and. closed loop control in the upper-stream, stands of CSMs. Moreover, complex-mode flatness control was realized by coordinating multiple shape-control methods in the downstream stands of CSMs. In addition, the RSCT approach was applied in several silicon-steel production plants, where an outsicanding performance and remarkable economic benefits were observed.

关键词： silicon steel rectangular section control technology hot rolling cold rolling edge drop

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具有稳定阈值开关特性的全印刷IGZO忆阻器阵列用于人工伤害感受器

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Science China Materials 2024年第8期67卷 2661-2670页

作者：彭文鸿刘常飞许晨辉覃琮尧秦宁浦陈惠鹏郭太良胡文平 Institute of Optoelectronic Display National&Local United Engineering Lab of Flat Panel Display TechnologyFuzhou UniversityFuzhou 350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350100China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University&Collaborative InnovationCenter of Chemical Science and Engineering(Tianjin)Tianjin 300072China

人工感知系统的大规模制备与图案化对实现仿生系统至关重要.传统工艺的图案化受限于掩膜版,难以大规模制备.喷墨打印技术的无掩膜图案化制备能力十分适配目前大规模制备的需求.然而,在器件的制造上,打印技术往往局限于制造简单的器件或... 详细信息

人工感知系统的大规模制备与图案化对实现仿生系统至关重要.传统工艺的图案化受限于掩膜版,难以大规模制备.喷墨打印技术的无掩膜图案化制备能力十分适配目前大规模制备的需求.然而,在器件的制造上,打印技术往往局限于制造简单的器件或在复杂器件中制备图案化的有源层.在此,我们实现全喷墨打印IGZO忆阻器阵列用于模拟伤害感受器.通过在全金属氧化物的ITO/IGZO/ITO忆阻器中加入一层Ag,实现了稳定的阈值切换特性,大的电流开关比(10~5),10~4次循环扫描的出色开关耐久性和良好的空间均匀性.我们分析了器件基于Ag导电丝的传导方式和LIF特性,如积累爆发、自泄露等,证明了忆阻器作为人工神经元的潜力.最后,我们利用该器件稳定的阈值切换特性,成功实现了人工伤害感受器,包括阈值、松弛、无适应和敏化.我们的工作证明了喷墨打印技术在实现仿生系统中拥有着巨大的应用潜力.

关键词：喷墨打印技术有源层忆阻器人工神经元图案化金属氧化物循环扫描感知系统

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Crustal structure and sedimentation history over the Alleppey platform, southwest continental margin of India:Constraints from multichannel seismic and gravity data

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Geoscience Frontiers 2018年第2期9卷 549-558页

作者： P.Unnikrishnan M.Radhakrishna G.K.Prasad Department of Earth Sciences Indian Institute of Technology Bombay flat 3 "Muruga Kripa"

The Alleppey Platform is an important morphological feature located in the Kerala-Konkan basin off the southwest coast of India. In the present study, seismic reflection data available in the basin were used to understand the sedimentation history and also to carry out integrated gravity interpretation. Detailed seismic reflection data in the basin reveals that:(1) the Alleppey Platform is associated with a basement high in the west of its present-day geometry(as observed in the time-structure map of the Trap Top(K/T boundary)),(2) the platform subsequently started developing during the Eocene period and attained the present geometry by the Miocene and,(3) both the Alleppey platform and the Vishnu fracture zone have had significant impact on the sedimentation patterns(as shown by the time-structure and the isochron maps of the major sedimentary horizons in the region). The 3-D sediment gravity effect computed from the sedimentary layer geometry was used to construct the crustal Bouguer anomaly map of the *** 3-D gravity inversion of crustal Bouguer anomaly exhibits a Moho depression below the western border of the platform and a minor rise towards the east which then deepens again below the Indian shield. The 2-D gravity modelling across the Alleppey platform reveals the geometry of crustal extension,in which there are patches of thin and thick crust. The Vishnu Fracture Zone appears as a crustal-scale feature at the western boundary of the Alleppey platform. Based on the gravity model and the seismic reflection data, we suggest that the basement high to the west of the present day Alleppey platform remained as a piece of continental block very close to the mainland with the intervening depression filling up with sediments during the rifting. In order to place the Alleppey platform in the overall perspective of tectonic evolution of the Kerala-Konkan basin, we propose its candidature as a continental fragment.

关键词： Gravity Seismic reflection Alleppey platform Rifting Continental fragments Western continental margin of India

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本征可修复的导电聚合物/水凝胶纳米复合薄膜及其独特的体沟道用于实现高性能、柔性和可修复的有机光电晶体管

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Science China Materials 2024年第5期67卷 1491-1499页

作者：严育杰朱晓婷张国成汪秀梅韩笑李伟洲孙东亚李月婵王义谢安陈惠鹏 School of Materials Science and Engineering Xiamen University of TechnologyKey Laboratory of Functional Materials and Applications of Fujian ProvinceXiamen Key Laboratory of High Performance Metals and MaterialsXiamen UniversityXiamen361024China Institute of Optoelectronic Display National&Local United Engineering Laboratory of Flat Panel Display TechnologyFuzhou UniversityFuzhou350002China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou350207China Fujian University of Technology Fuzhou350108China School of Engineering Anhui Agricultural UniversityHefei230036China

柔性有机光电晶体管(OPTs)在大机械形变的下一代可穿戴系统中至关重要.然而,目前报道的大多数OPTs都是场效应基结构,其界面电荷传输和本征低跨导的特性限制了OPTs的机械柔性和光电性能的发展.此外,沟道层的p共轭半导体聚合物也缺乏特殊... 详细信息

柔性有机光电晶体管(OPTs)在大机械形变的下一代可穿戴系统中至关重要.然而,目前报道的大多数OPTs都是场效应基结构,其界面电荷传输和本征低跨导的特性限制了OPTs的机械柔性和光电性能的发展.此外,沟道层的p共轭半导体聚合物也缺乏特殊的可修复位点,使其很难实现薄膜的自我修复功能.本文报道了一个具有独特体沟道和强修复功能的柔性高光电性能的OPTs.该OPTs使用有机电化学晶体管架构,由3D体沟道的可修复导电聚合物/水凝胶复合薄膜组成.该器件不仅在遭受损伤后能够在100 ms内有效恢复其机械和电学性能,同时还展现出出色的机械柔性.更重要的是,该器件实现了紫外光波段的高光测性能,其中光响应度高达1.01×10^(5)A W^(-1),探测率达1.01×10^(5)A W^(-1),外量子效率达3.03×104%.结果表明,具有独特体沟道和本征可修复功能的OPTs在下一代可穿戴电子器件的使用中具有潜在应用价值.

关键词： electrochemical transistor interface phototransistor healing volumetric channel flexibility

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Deformation resistance prediction of tandem cold rolling based on grey wolf optimization and support vector regression

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Journal of Iron and Steel Research International 2023年第9期30卷 1803-1820页

作者： Ze-dong Wu Xiao-chen Wang Quan Yang Dong Xu Jian-wei Zhao Jing-dong Li Shu-zong Yan National Engineering Technology Research Center of flat Rolling Equipment University of Science and Technology BeijingBeijing 100083China

In the traditional rolling force model of tandem cold rolling mills,the calculation of the deformation resistance of the strip head does not consider the actual size and mechanical properties of the incoming material,which results in a mismatch between the deformation resistance setting and the actual state of the incoming material and thus affects the accuracy of the rolling force during the low-speed rolling process of the strip *** inverse calculation of deformation resistance was derived to obtain the actual deformation resistance of the strip head in the tandem cold rolling process,and the actual process parameters of the strip in the hot and cold rolling processes were integrated to create the cross-process dataset as the basis to establish the support vector regression(SVR)*** grey wolf optimization(GWO)algorithm was used to optimize the hyperparameters in the SVR model,and a deformation resistance prediction model based on GWO–SVR was *** with the traditional model,the GWO–SVR model shows different degrees of improvement in each stand,with significant improvement in stands S3–*** prediction results of the GWO–SVR model were applied to calculate the head rolling setting of a 1420 mm tandem rolling *** head rolling force had a similar degree of improvement in accuracy to the deformation resistance,and the phenomenon of low head rolling force setting from stands S3 to S5 was obviously ***,the thickness quality and shape quality of the strip head were improved accordingly,and the application results were consistent with expectations.

关键词： Tandem cold rolling Cross-process data application Deformation resistance prediction Support vector regression Grey wolf optimization Rolling force accuracy

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