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数字化转型如何影响企业技术创新?——基于内外双重视角的实证研究

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企业经济 2024年第9期43卷 48-59页

作者：陈少林胡兵张明重庆对外经贸学院跨境商务学院重庆合川401520 重庆师范大学经济与管理学院重庆沙坪坝401331 西南大学国家治理学院重庆北碚400715

数字化转型对企业技术创新能力提升与竞争优势重塑具有重要意义。本文基于中国A股上市公司样本数据,实证考察数字化转型对企业技术创新的影响及作用机制。结果发现:数字化转型显著促进企业技术创新“增投”“扩量”“改质”及“提效”;... 详细信息

数字化转型对企业技术创新能力提升与竞争优势重塑具有重要意义。本文基于中国A股上市公司样本数据,实证考察数字化转型对企业技术创新的影响及作用机制。结果发现:数字化转型显著促进企业技术创新“增投”“扩量”“改质”及“提效”;机制研究表明,数字化转型能够通过对内提升人力资本水平和改善信息披露质量,对外缓解供应链集中度与降低环境不确定性促进企业技术创新;异质性分析发现,数字化转型对非劳动密集企业与领导企业的技术创新产出和效率,知识产权保护较强地区企业创新投入、质量与效率以及市场化水平较低地区企业整体技术创新水平的积极影响均更为明显。为此,政府应全力支持企业数字化转型,企业需主动选择适用性数字化转型方案,同时也需重视发挥领导企业在行业数字化转型中的示范作用,以此全面促进企业技术创新。

关键词：数字化转型创新投入创新产出创新效率作用机制

基于导电油墨层电阻层析成像的混凝土裂缝损伤识别

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传感技术学报 2024年第6期37卷 1084-1089页

作者：蔡晨宁陈少林刘丽娜南京航空航天大学民航学院江苏南京211106 南京航空航天大学金城学院江苏南京211156

为解决混凝土裂缝损伤的监测问题,提出利用石墨烯碳油墨在混凝土表面制备导电层,利用电阻层析成像技术进行裂缝损伤识别。通过比较损伤前后导电层边界电压变化,利用TV-SB正则化算法重建损伤引起的电导率变化分布图像以确定裂缝损伤情况... 详细信息

为解决混凝土裂缝损伤的监测问题,提出利用石墨烯碳油墨在混凝土表面制备导电层,利用电阻层析成像技术进行裂缝损伤识别。通过比较损伤前后导电层边界电压变化,利用TV-SB正则化算法重建损伤引起的电导率变化分布图像以确定裂缝损伤情况。分别进行人工模拟裂缝和混凝土梁弯曲裂缝检测实验,来验证所提方法对裂缝损伤识别的效果。实验结果表明,导电油墨层性能良好,电阻层析成像技术重建的电导率变化图像能够较好地反映裂缝损伤的位置和长度等信息,可为混凝土裂缝损伤的监测和识别提供一种有前景的技术。

关键词：混凝土结构监测电阻层析成像裂缝损伤识别导电油墨层

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软土基础核岛厂房振动台试验数值模拟分析

地震工程与工程振动 2024年第4期44卷 46-61页

作者：上官云翔陈少林吕昊景立平南京航空航天大学民航学院江苏南京210016 山东科技大学安全与环境工程学院山东青岛266590 中国地震局工程力学研究所地震工程与工程振动重点实验室黑龙江哈尔滨150080

采用土-结相互作用分区分析方法(partitioned analysis of soil-structure interaction,PASSI),对软土地基核岛厂房振动台试验中的筏基-混凝土框架模型以及桩基-混凝土框架模型进行了数值模拟,对比分析了振动台试验结果与数值模拟结果,... 详细信息

采用土-结相互作用分区分析方法(partitioned analysis of soil-structure interaction,PASSI),对软土地基核岛厂房振动台试验中的筏基-混凝土框架模型以及桩基-混凝土框架模型进行了数值模拟,对比分析了振动台试验结果与数值模拟结果,并对软土地基下核岛厂房土-基础-结构的地震响应特征进行了分析。对2种模型输入调幅为0.05、0.10、0.20 g的RG160、Chi-Chi与Landers地震波,对比分析了各工况下振动台试验与数值模拟的土体与结构加速度放大系数、楼层反应谱、筏基底部土压力时程、桩身应变以及桩身弯矩。结果表明:数值模拟结果能较好地反映振动台试验结果;经过土层放大作用,随着楼层的增高,振动台试验和数值模拟中的加速度放大系数随之增大,反映了同样的规律;振动台试验与数值模拟所得的土-结体系的反应谱均与输入地震动频谱特征及体系的振动特性相关;振动台试验中,筏板基础会出现倾覆现象,筏基底部土压力时程表现出“东高西低”的现象,但数值模拟中筏基底部的土压力时程未出现此种现象,其原因是数值模拟中未考虑土体与基础的接触非线性;数值模拟中群桩的地震响应与试验的宏观现象基本吻合,定量上有差异,是数值模拟中未考虑桩的非线性所致。

关键词：软土地基核岛厂房地震响应土-结相互作用数值模拟

Seismic response characteristics of nuclear island structure at generic soil and rock sites

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Earthquake Engineering and Engineering Vibration 2023年第3期22卷 667-688页

作者： Lv Hao chen shaolin Department of Civil and Airport Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China College of Safety and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China College Resources Shandong University of Science and TechnologyTai’an 271019China

The number of traditionally excellent coastal lithologic nuclear power plants is *** is a trend to develop nuclear power plants on soil sites in inland ***,the seismic safety and adaptability of non-rock nuclear power plant(NPP)sites are the key concerns of nuclear safety *** the five site categories are clearly defined in the AP1000 design control documents,the effects of nuclear power five site conditions and soil nonlinearity on the seismic response characteristics of nuclear island buildings have not been systematically considered in previous related *** this study,targeting the AP1000 nuclear island structure as the research object,three-dimensional finite element models of a nuclear island structure at five types of sites(firm rock site(FR),soft rock site(SR),soft-to-medium soil site(SMS),upper bound soft-to-medium site(SMS-UB),and soft soil site(SS))are *** partitioned analysis method of soil-structure interaction(PASSI)in the time-domain is used to investigate the effects of site hardness and nonlinearity on the acceleration,displacement,and acceleration response spectrum of the nuclear island structure under seismic *** incremental equilibrium equation and explicit decoupling method are used to analyze the soil nonlinearity described by the Davidenkov model with simplified loading-reloading *** results show that,in the linear case,with the increase of site hardness,the peak ground acceleration(PGA)and the peak of acceleration response spectrum of the nuclear island structure increase except for the FR site,while the maximum displacement *** nonlinear analysis,as the site hardness increases,the PGA,maximum displacement,and the peak of acceleration response spectrum of the nuclear island structure *** peak value of the acceleration response spectrum in the nonlinear case is greater than that in the linear case for FR,while smaller for SR and soil *** site nonlinear

关键词： partitioned analysis for SSI site conditions nuclear structure explicit-implicit integration scheme incremental algorithm for nonlinear analysis

A hexahedron element formulation with a new multi-resolution analysis

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Science China(Physics,Mechanics & Astronomy) 2015年第1期58卷 65-74页

作者： XIA YiMing chen shaolin Civil Engineering Department Nanjing University of Aeronautics and Astronautics

A multiresolution hexahedron element is presented with a new multiresolution analysis(MRA)*** MRA framework is formulated out of a mutually nesting displacement subspace sequence,whose basis functions are constructed of scaling and shifting on element domain of a basic node shape *** basic node shape function is constructed from shifting to other seven quadrants around a specific node of a basic isoparametric element in one quadrant and joining the corresponding node shape functions of eight elements at the specific *** MRA endows the proposed element with the resolution level(RL)to adjust structural analysis *** a result,the traditional 8-node hexahedron element is a monoresolution one and also a special case of the proposed *** meshing for the monoresolution finite element model is based on the empiricism while the RL adjusting for the multiresolution is laid on the solid mathematical *** simplicity and clarity of shape function construction with the Kronecker delta property and the rational MRA enable the proposed element method to be more rational,easier and efficient in its implementation than the conventional mono-resolution solid element method or other MRA *** multiresolution hexahedron element method is more adapted to dealing with the accurate computation of structural problems.

关键词： hexahedron element multiresolution analysis (MRA) resolution level (RL) basic node shape function mutually nesting displacement subspace sequence scaling and shifting

拟南芥HHP2基因对韧皮部蔗糖装载的调控功能

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西北农林科技大学学报（自然科学版） 2024年第8期52卷 122-132,142页

作者：于修远徐启玉尹世娇陈少林 LIESCHE Johannes 西北农林科技大学生命科学学院陕西杨凌712100 西北农林科技大学旱区生物质能研究中心陕西杨凌712100 西北农林科技大学旱区作物逆境生物学国家重点实验室陕西杨凌712100

【目的】探究膜蛋白HHP2在韧皮部蔗糖装载中的作用与机制,为作物增产增效提供理论依据。【方法】利用多种生物信息学分析方法,对HHP2及其同源蛋白序列以及HHP2基因的转录表达谱进行分析,以预测其功能并发掘其他同源蛋白。使用荧光共聚... 详细信息

【目的】探究膜蛋白HHP2在韧皮部蔗糖装载中的作用与机制,为作物增产增效提供理论依据。【方法】利用多种生物信息学分析方法,对HHP2及其同源蛋白序列以及HHP2基因的转录表达谱进行分析,以预测其功能并发掘其他同源蛋白。使用荧光共聚焦显微镜对HHP2蛋白和蔗糖转运蛋白SUC2进行共定位分析,利用荧光共振能量转移试验检测HHP2与SUC2蛋白的互作,通过七叶树苷摄取试验检测HHP2对SUC2蛋白的直接影响。通过实时荧光定量PCR和Western-Blot试验,分析和比较hhp2突变体SUC2基因的转录水平和蛋白水平;利用离子色谱方法分析和比较hhp2突变体的韧皮部蔗糖输出效率;采用AlphaFold和Autodock软件,对HHP2蛋白结构及HHP2和蔗糖分子之间的潜在对接能力进行分析。【结果】HHP2同源蛋白共有5个保守模体和1个保守结构域。HHP2基因在拟南芥叶和茎等蔗糖输出器官中低表达,在根、花和种子等蔗糖需求器官中高表达。在本氏烟草远轴面表皮细胞中瞬时表达HHP2,发现其与SUC2蛋白共定位。HHP2与SUC2蛋白存在互作,且HHP2能抑制SUC2的蔗糖转运活性。HHP2缺失突变分析表明,HHP2是SUC2的负调控因子,HHP2缺失突变导致SUC2转录水平提高至6倍左右,蛋白水平提高至1.3倍左右,hhp2缺失突变体的蔗糖转运效率提高至2倍左右。分子对接分析表明,HHP2可能通过与蔗糖结合发挥其调控功能。【结论】HHP2是SUC2的负调控因子,参与调控植物体内蔗糖的转运与分配,可能是分子育种的潜在靶标。

关键词：拟南芥膜蛋白蔗糖转运调控因子

A RECTANGULAR SHELL ELEMENT FORMULATION WITH A NEW MULTI-RESOLUTION ANALYSIS

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Acta Mechanica Solida Sinica 2014年第6期27卷 612-625页

作者： Yiming Xia Yuanxue Liu shaolin chen Gan Tang Chongqing Key Laboratory of Geomechanics and Geoenvironmental Protection Department of Civil Engineering Logistical Engineering University Civil Engineering Department Nanjing University of Aeronautics and Astronautics

A multi-resolution rectangular shell element with membrane-bending based on the Kirchhoff-Love theory is proposed. The multi-resolution analysis （MRA） framework is formulated out of a mutually nesting displacement subspace sequence, whose basis functions are constructed of scaling and shifting on the element domain of basic node shape functions. The basic node shape functions are constructed from shifting to other three quadrants around a specific node of a basic element in one quadrant and joining the corresponding node shape functions of four elements at the specific node. The MRA endows the proposed element with the resolution level （RL） to adjust the element node number, thus modulating structural analysis accuracy accordingly. The node shape functions of Kronecker delta property make the treatment of element boundary condition quite convenient and enable the stiffness matrix and the loading column vectors of the proposed element to be automatically acquired through quadraturing around nodes in RL adjusting. As a result, the traditional 4-node rectangular shell element is a mono-resolution one and also a special case of the proposed element. The accuracy of a structural analysis is actually determined by the RL, not by the mesh. The simplicity and clarity of node shape function formulation with the Kronecker delta property, and the rational MRA enable the proposed element method to be implemented more rationally, easily and efficiently than the conventional mono-resolution rectangular shell element method or other corresponding MRA methods.

关键词： rectangular shell element multi-resolution analysis (MRA) resolution level (RL),basic node shape function mutually nesting displacement subspace sequence scaling and shifting

基于自适应ANN的高效核电设备易损性分析方法研究

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震灾防御技术 2024年第1期19卷 108-118页

作者：刘鸿泉陈少林孙晓颖吴绍恒南京航空航天大学南京211106 中国地震局工程力学研究所哈尔滨150080 中国核电工程有限公司北京100840

传统的结构或设备易损性分析方法需要提供大量的数值模拟样本,这对于规模庞大的核电结构并不适用。为此,研究核电设备高效易损性分析方法,首先,基于拉丁立方法构建随机地震动-土-结构样本,采用高效时域SSI分区并行计算方法得到部分样本... 详细信息

传统的结构或设备易损性分析方法需要提供大量的数值模拟样本,这对于规模庞大的核电结构并不适用。为此,研究核电设备高效易损性分析方法,首先,基于拉丁立方法构建随机地震动-土-结构样本,采用高效时域SSI分区并行计算方法得到部分样本模型的地震响应;然后,采用有限的数值模拟结果训练人工神经网络模型(ANN),通过量化ANN预测误差和精确度指标,采用自适应算法进行后续数值模拟和ANN训练,直至满足精确度阈值要求。该方法可以优化计算样本的选择,控制数值模拟的样本数量,提高易损性分析的计算效率。此外,将ANN不确定性整合到易损性曲线计算公式中,分别基于对数正态假定的回归法和蒙特卡洛(MC)增量法对某核电设备进行了易损性分析,并验证了ANN不确定性量化方法的正确性。

关键词：易损性分析人工神经网络蒙特卡洛法土-结构相互作用核电设备

RAPD tagging of a salt tolerant gene in rice

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Chinese Science Bulletin 1998年第4期43卷 330-332页

作者： Ding Haiyuan Zhang Gengyun Guo Yan chen shaolin chen Shouyi Chinese Acad Sci Inst Genet Plant Biotechnol Lab Beijing 100101 Peoples R China

A salt tolerant rice mutant was obtained through tissue culture. The inheritance of salt tolerance in F2 population of mutant crossed with its original variety under salt stress was studied. According to the standard, the ratio of salt tolerant: sensitive was about 3:1 suggesting that there was a major gene related to salt tolerance in the mutant. By RAPD analysis with 220 10mer primers, the gene was tagged by a 1.0 kb DNA fragment named OPS1210 which was located on chromosome 7. The genetic distance between the major salt tolerant gene was 16.4 cm.

关键词： rice salt tolerant mutant line RAPD molecular marker.