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Journal of Oceanology and Limnology 2024年第4期42卷 1261-1271页

作者： Yeshao PENG ziao chen Qiong DENG Zhen JIA Lingxin KONG Peng ZHU Youhou XU Zhicai SHE Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation Pinglu Canal and Beibu Gulf Coastal Ecosystem Observation and Research Station of GuangxiCollege of Marine SciencesBeibu Gulf UniversityQinzhou 535011China

The chloride channel 7 gene(CLC 7)of the Hong Kong oyster Crassostrea hongkongensis was cloned and named ChCLC *** cDNA was 2572 bp in length,with a 5′non-coding region containing 25 bp,a 3′non-coding region containing 327 bp,and an open reading frame of 2298 *** 7 has 96.8%and 92.1%homology with CLC 7 of Crassostrea gigas and Crassostrea virginica,respectively,and it was clustered with CLC 7 of *** and ***-PCR showed that ChCLC 7 was expressed in all eight tissues,with the highest in adductor muscle and second in *** ChCLC 7 expression pattern in gill was altered significantly under high salinity stress with an overall upward and then downward *** RNA interference,the expression of ChCLC 7 and survival rate of oyster under high salinity stress was reduced significantly,and so did the concentration of hemolymph chloride ion in 48-96 h after RNA *** believed that ChCLC 7 could play an important role in osmoregulation of *** by regulating Cl^(-)*** study provided data for the analysis of molecular mechanism against oyster salinity stress.

关键词： Crassostrea hongkongensis chloride channel 7 salinity stress RNA interference

Symmetric Variation of Monomers for Constructing 1D/2D Imine-Based Covalent Organic Frameworks

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CCS Chemistry 2024年第4期6卷 941-952页

作者： Pengzhong Shi Kai Wang ziao chen Jiawei Wang Kaifu Lin Ngangnseh Leboh Solange Yanfeng Yue Zhiyong Guo College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108 Department of Chemistry Delaware State UniversityDoverDelaware 19901

Synthetic control of topology connectivity is the crowning achievement for covalent organic framework(COF)*** a large number of one-,two-,and three-dimensional(1D,2D,and 3D)COFs have been reported,their topology structure constructions are restricted to the use of symmetric monomers with the purpose of increasing the crystallinity and/or ***,three imine-linked COFs with different topology nets(namely,sql-b and sql-c)were constructed by symmetric variation of monomers via the condensation of a tetra-amine monomer with a D2h-symmetry and lower C_(2v)-symmetric dialdehyde monomers,bearing a phenolic hydroxyl group at different *** results indicated that a reasonable introduction of the phenolic hydroxyl group could effectively tune the topological structure of COFs at the molecular level during the crystallization ***,the remarkable difference in the dye uptake ability between these COF materials indicated that the fabricated specific pore geometries,as well as different steric hindrance and H-bonding interactions,played a pivotal role in accessing molecules in the ***,this work might boost the explorations of COF materials with expected topologies and pore geometries from conventional monomers through bottom-up synthesis methodology by molecular designing and engineering.

关键词： covalent organic framework topology/dimension regulation molecular symmetry substituent effect molecular sieving

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基于可变形三维图卷积的轻量级点云分类研究

计算机工程 2024年第9期50卷 255-265页

作者：蔡俊民梁正友孙宇陈子奥广西大学计算机与电子信息学院广西南宁530004 广西大学广西多媒体通信与网络技术重点实验室广西南宁530004

现有深度学习方法在处理点云分类任务时,依赖于点的绝对坐标,存在模型复杂度较大的问题。对此,提出一种轻量级的点云分类网络DMGCN-3D。使用自适应空洞K近邻(KNN)算法构造图结构,尽可能捕捉局部更广泛空间的几何结构信息,并减少计算开支... 详细信息

现有深度学习方法在处理点云分类任务时,依赖于点的绝对坐标,存在模型复杂度较大的问题。对此,提出一种轻量级的点云分类网络DMGCN-3D。使用自适应空洞K近邻(KNN)算法构造图结构,尽可能捕捉局部更广泛空间的几何结构信息,并减少计算开支;构造可变形三维图卷积,引入可学习的点与点之间的方向向量来获取相对特性,在特征提取过程中保证点云的置换不变性与尺度不变性;构建多头自注意力模块,通过残差结构将分组变换注意力(GSA)与多层感知机(MLP)相结合,MLP有助于保持原始点云信息的完整性,GSA使得网络能够学习特征内部的自相关性,在提高特征表达能力的同时降低参数总量;使用空间变换网络结合MLP来学习点云特征;对所提取的特征进行融合以得到更综合的特征,将其用于点云分类。实验结果表明,DMGCN-3D在ModelNet10、ModelNet40、ScanObjectNN数据集上的总体精度分别达到96.5%、94.7%、81.9%,比DGCNN分别提高2.9、2.1、3.8个百分点,参数总量相比DGCNN、LDGCNN、3DGCN模型分别降低52.9%、23.9%、3.3%,且DMGCN-3D能够保持较高的鲁棒性。

关键词：点云分类可变形三维图卷积自适应多头自注意力轻量级网络

A deep learning-based approach for flow field prediction in a dual-mode combustor

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Propulsion and Power Research 2024年第2期13卷 178-193页

作者： chen Kong ziao Wang Fuxu Quan Yunfei Li Juntao Chang Harbin Institute of Technology Harbin 150001China

Accurate acquisition of the distribution ofﬂow parameters inside the supersonic combustor is of great signiﬁcance for hypersonicﬂight *** is an interesting attempt to introduce a data-driven model to a supersonic combustor forﬂowﬁeld *** paper proposes a novel method for predicting theﬂowﬁeld in a dual-mode combustor.Aﬂowﬁeld prediction convolutional neural network with multiple branches is *** investiga-tions for a strut variable geometry combustor have been conducted to obtainﬂowﬁeld data for training the network as aﬂowﬁeld prediction ***ﬂowﬁeld data are obtained by changing the equivalent ratio,incomingﬂow condition and geometry of the supersonic *** Mach number distribution can be obtained from the trainedﬂowﬁeld predic-tion model using the combustor wall pressure as input with high *** accuracy ofﬂowﬁeld prediction is discussed in several ***,the combustion mode detection is im-plemented on the predictionﬂowﬁeld.ª2024 The *** services by Elsevier *** behalf of KeAi Communications ***.

关键词： Flowﬁeld prediction Deep learning(DL) Convolutional neural networks(CNNs) Data-driven model Dual-mode combustor Variable geometry combustor

Spin-orbit torque effect in silicon-based sputtered Mn_(3)Sn film

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Chinese Physics B 2024年第10期33卷 394-399页

作者： Sha Lu Dequan Meng Adnan Khan ziao Wang Shiwei chen Shiheng Liang School of Physics Hubei UniversityWuhan 430062China Key Laboratory for Intelligent Sensing System and Security of Ministry of Education Wuhan 430062China

Noncollinear antiferromagnet Mn_(3)Sn has shown remarkable efficiency in charge-spin conversion,a novel magnetic spin Hall effect,and a stable topological antiferromagnetic state,which has resulted in great interest from researchers in the field of spin-orbit *** research has primarily focused on the spin-orbit torque effect of epitaxially grown noncollinear antiferromagnet Mn_(3)Sn ***,this method is not suitable for large-scale industrial *** this study,amorphous Mn_(3)Sn films and Mn_(3)Sn/Py heterostructures were prepared using magnetron sputtering on silicon *** spin-torque ferromagnetic resonance measurement demonstrated that only the conventional spin-orbit torque effect generated by in-plane polarized spin currents existed in the Mn_(3)Sn/Py heterostructure,with a spin-orbit torque efficiency of ***,we prepared the perpendicular magnetized Mn_(3)Sn/CoTb heterostructure based on amorphous Mn_(3)Sn film,where the spin-orbit torque driven perpendicular magnetization switching was achieved with a lower critical switching current density(3.9×10^(7)A/cm^(2))compared to Ta/CoTb *** research reveals the spin-orbit torque effect of amorphous Mn_(3)Sn films and establishes a foundation for further advancement in the practical application of Mn_(3)Sn materials in spintronic devices.

关键词： spintronics noncollinear antiferromagnetism spin-orbit torque

Modeling urban redevelopment:A novel approach using time-series remote sensing data and machine learning

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Geography and Sustainability 2024年第2期5卷 211-219页

作者： Li Lin Liping Di chen Zhang Liying Guo Haoteng Zhao Didarul Islam Hui Li ziao Liu Gavin Middleton Center for Spatial Information Science and Systems George Mason UniversityFairfaxVA22030USA Department of Geography and Geoinformation Science George Mason UniversityFairfaxVA22030USA

Accurate mapping and timely monitoring of urban redevelopment are pivotal for urban studies and decisionmakers to foster sustainable urban *** mapping methods heavily depend on field surveys and subjective questionnaires,yielding less objective,reliable,and timely *** advancements in Geographic Information Systems(GIS)and remote-sensing technologies have improved the identification and mapping of urban redevelopment through quantitative analysis using satellite-based ***,challenges persist,particularly concerning accuracy and significant temporal *** study introduces a novel approach to modeling urban redevelopment,leveraging machine learning algorithms and remote-sensing *** methodology can facilitate the accurate and timely identification of urban redevelopment *** study’s machine learning model can analyze time-series remote-sensing data to identify spatio-temporal and spectral patterns related to urban *** model is thoroughly evaluated,and the results indicate that it can accurately capture the time-series patterns of urban *** research’s findings are useful for evaluating urban demographic and economic changes,informing policymaking and urban planning,and contributing to sustainable urban *** model can also serve as a foundation for future research on early-stage urban redevelopment detection and evaluation of the causes and impacts of urban redevelopment.

关键词： Urban redevelopment Urban sustainability Remote sensing Time-series analysis Machine learning

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基于接口协议的路由器攻击防御设计与实现

网络新媒体技术 2023年第5期12卷 27-32页

作者：陈子傲陈俊强武汉邮电科学研究院武汉430000 烽火通信科技股份有限公司武汉430073

网络设备经常会收到大量针对设备CPU的报文攻击,为了提高设备CPU的防护能力,一般需要在设备本机部署相应的攻击防御策略进行防护。为了提高路由器等现有网络设备的攻击防护能力,采用了基于接口协议的CAR限速策略,在接口维度上进行智能... 详细信息

网络设备经常会收到大量针对设备CPU的报文攻击,为了提高设备CPU的防护能力,一般需要在设备本机部署相应的攻击防御策略进行防护。为了提高路由器等现有网络设备的攻击防护能力,采用了基于接口协议的CAR限速策略,在接口维度上进行智能攻击感知,将相关配置通过操作平台数据平面对象FDPO的形式映射在驱动数据平面对象DDPO,并写入转发表中,实现接口维度的流量分类和限速。经过实验,拦截了98%以上的恶意流量,有效完成攻击防御。

关键词：网络攻击攻击检测流量分类 CAR 限速防攻击

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上海海岸带演变及生态系统服务价值变化

上海海洋大学学报 2024年第2期33卷 409-423页

作者：崔子奥高郭平陈洁上海海洋大学海洋科学与生态环境学院上海201306

为了开展上海海岸带演变及生态系统服务价值(Ecosystem service value,ESV)变化研究,实验基于1990、2000、2010和2020年Landsat遥感影像数据,分析上海海岸带岸线长度变化特征;结合Globe Land 30的数据,利用空间分析,开展1990—2000年、2... 详细信息

为了开展上海海岸带演变及生态系统服务价值(Ecosystem service value,ESV)变化研究,实验基于1990、2000、2010和2020年Landsat遥感影像数据,分析上海海岸带岸线长度变化特征;结合Globe Land 30的数据,利用空间分析,开展1990—2000年、2000—2010年和2010—2020年等3个时期内土地变化和土地转移研究;在此基础上,构建上海海岸带ESV模型,厘清2000—2020年上海海岸带ESV时空变化特征。结果表明:1990—2020年间,受人类活动和自然因素影响,上海大陆岸线长度呈先增加后缓慢减小到再增加的变化趋势,崇明岛岸线减少,长兴岛和横沙岛岸线长度增加。同时,由于人类活动强度和沿海工程力度加大,海岸带土地利用面积变化显著,耕地和建设用地增多。此外,由于土地扩建,研究期间上海海岸带呈ESV增加趋势,但其湿地ESV在2010—2020间下降28.59%。就空间分布而言,上海海岸带ESV从中高值区域逐渐向低和极低区域转变,到2020年,单位面积ESV极高地区已基本消失。城市进程中建设用地的开发和沿海湿地生态系统的减少是造成上海海岸带ESV变化的主要原因。本研究可为服务上海市指导海岸带环境管理以及可持续发展提供科学依据和决策支持。

关键词：海岸带生态系统服务土地利用围填海当量因子上海

苗绣纹样搜索中草图和文本检索的认知负荷对比研究

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包装工程 2024年第4期45卷 253-261页

作者：陈靖翕陈洋王子翱彭莉贵州大学贵阳550025

目的为了探究一种更高效的苗绣纹样检索方式,通过对手绘草图检索及文本检索过程中的认知负荷来进行对比研究。方法首先通过构建认知负荷信息检索过程模型,对5个认知阶段的平均认知负荷及所需时间进行实验对比;其次通过眼动指标(持续注... 详细信息

目的为了探究一种更高效的苗绣纹样检索方式,通过对手绘草图检索及文本检索过程中的认知负荷来进行对比研究。方法首先通过构建认知负荷信息检索过程模型,对5个认知阶段的平均认知负荷及所需时间进行实验对比;其次通过眼动指标(持续注视时间、眼球扫视振幅、眼球直径)及NASA-TLX评估对两种检索过程的认知负荷进行分析;最后基于眼动追踪得到可视化眼动数据(热点图、注视轨迹)验证是否符合检索任务需求。结论基于手绘草图的图形检索方式更适合于苗绣纹样检索,通过主、客观融合对比实验验证了草图检索的高效性,同时也验证了眼动追踪和NASA_TLX具有相关性,能更有效地进行认知负荷测量。

关键词：草图检索认知负荷眼动追踪苗绣纹样

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使用净现值法优化余热回收换热器

工业加热 2017年第3期46卷 1-3,8页

作者：李子奥陈晓瑜肖松昆明理工大学冶金与能源工程学院云南昆明650093

引入最优化方法,提出以净现值(NPV)为优化目标,以余热回收换热器换热面积为设计变量的优化设计模型。引入传热单元数(NTU)作为换热面积的度量,分析NTU变化对NPV的影响,从而确定优化方案,并且获得最优化条件下空气预热出口温度(t_2)。通... 详细信息

引入最优化方法,提出以净现值(NPV)为优化目标,以余热回收换热器换热面积为设计变量的优化设计模型。引入传热单元数(NTU)作为换热面积的度量,分析NTU变化对NPV的影响,从而确定优化方案,并且获得最优化条件下空气预热出口温度(t_2)。通过对燃烧二甲醚年产4万t玻璃炉窑烟气余热回收换热器的分析,结果显示在NTU=1.51时,换热器得到最大净现值NPV=7.53万元,空气预热出口温度t_2=100℃。同时,每年可节约燃料194.1 t和减少CO_2的排放量33.82。因此,采用余热回收换热器优化设计模型,通过对投资后整个运行期内的经济效果分析,可以对回收方案的合理性进行更为全面的评价。

关键词：净现值(NPV) 传热单元数(NTU) 余热回收换热器经济效益