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Feature deformation network with multi-range feature enhancement for agricultural machinery operation mode identification

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International Journal of Agricultural and Biological Engineering 2024年第4期17卷 265-275页

作者： weixin Zhai Zhi Xu Jinming Liu Xiya Xiong Jiawen Pan Sun-Ok Chung Dionysis Bochtis Caicong Wu College of Information and Electrical Engineering China Agricultural UniversityBeijing 100083China Key Laboratory of Agricultural Machinery Monitoring and Big Data Application Ministry of Agriculture and Rural AffairsBeijing 100083China Department of Smart Agricultural Systems Graduate SchoolChungnam National UniversityDaejeon 34134Republic of Korea Institute for Bio-Economy and Agri-Technology(iBO) Centre for Research and Technology-Hellas(CERTH)Thessaloniki 57001Greece

Utilizing the spatiotemporal features contained in extensive trajectory data for identifying operation modes of agricultural machinery is an important basis task for subsequent agricultural machinery trajectory *** the present study,to effectively identify agricultural machinery operation mode,a feature deformation network with multi-range feature enhancement was ***,a multi-range feature enhancement module was developed to fully explore the feature distribution of agricultural machinery trajectory ***,to further enrich the representation of trajectories,a feature deformation module was proposed that can map trajectory points to high-dimensional space to form feature ***,EfficientNet-B0 was used to extract features of different scales and depths from the feature map,select features highly relevant to the results,and finally accurately predict the mode of each trajectory *** validate the effectiveness of the proposed method,experiments were conducted to compare the results with those of other methods on a dataset of real agricultural *** the corn and wheat harvester trajectory datasets,the model achieved accuracies of 96.88%and 96.68%,as well as F1 scores of 93.54%and 94.19%,exhibiting improvements of 8.35%and 9.08%in accuracy and 20.99%and 20.04%in F1 score compared with the current state-of-the-art method.

关键词： road-field trajectory classification efficientNet feature deformation network multi-range feature enhancement agricultural machinery operation mode recognition

Evolutionary dynamics and comparative pathogenicity of clade 2.3.4.4b H5 subtype avian influenza viruses,China,2021–2022

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Virologica sinica 2024年第3期39卷 358-368页

作者： siru Lin Junhong Chen Ke Li Yang Liu siyuan Fu Shumin Xie Aimin Zha Aiguo Xin Xinyu Han Yuting Shi Lingyu Xu Ming Liao weixin Jia National Avian Influenza Para-Reference Laboratory Guangdong Engineering Laboratory for Medicament of Zoonosis Prevention and ControlKey Laboratory of Zoonoses Prevention and Control of Guangdong ProvinceLaboratory for Lingnan Modern AgricultureCollege of Veterinary MedicineSouth China Agricultural UniversityGuangzhou510642China Key Laboratory of Zoonoses Key Laboratory of Animal Vaccine DevelopmentMinistry of AgricultureGuangzhou510642China Institute of Poultry Management and Diseases Yunnan Animal Science and Veterinary InstituteKunming650000China

The recent concurrent emergence of H5N1,H5N6,and H5N8 avian influenza viruses(AIVs)has led to significant avian mortality *** 2020,frequent human-animal interactions have been *** gain insight into the novel H5 subtype AIVs(i.e.,H5N1,H5N6 and H5N8),we collected 6102 samples from various regions of China between January 2021 and September 2022,and identified 41 H5Nx *** analyses on the evolution and biological properties of these isolates were *** analysis revealed that the 41 H5Nx strains belonged to clade 2.***.4.4b,with 13 related to H5N1,19 to H5N6,and 9 to *** based on global 2.***.4.4b viruses showed that all the viruses described in this study were likely originated from H5N8,exhibiting a heterogeneous evolutionary history between H5N1 and H5N6 during 2015–2022 worldwide.H5N1 showed a higher rate of evolution in 2021–2022 and more sites under positive selection pressure in 2015–*** antigenic profiles of the novel H5N1 and H5N6 exhibited notable *** hemagglutination inhibition assay suggested that some A(H5N1)viruses may be antigenically distinct from the circulating H5N6 and H5N8 *** challenge assays demonstrated that the H5N8 virus(21GD001_H5N8)displayed the highest pathogenicity in mice,followed by the H5N1 virus(B1557_H5N1)and then the H5N6 virus(220086_H5N6),suggesting a heterogeneous virulence profile of H5 AIVs in the mammalian *** on the above results,we speculate that A(H5N1)viruses have a higher risk of emergence in the ***,these findings unveil a new landscape of different evolutionary history and biological characteristics of novel H5 AIVs in clade 2.***.4.4b,contributing to a better understanding of designing more effective strategies for the prevention and control of novel H5 AIVs.

关键词： Avian influenza virus(AIV) H5 subtypes AIVs Evolutionary Pathogenicity

Effect of preload forces on multidimensional signal dynamic behaviours for battery early safety warning

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Journal of Energy Chemistry 2024年第5期92卷 484-498页

作者： Kuijie Li Jiahua Li Xinlei Gao Yao Lu Depeng Wang weixin Zhang Weixiong Wu Xuebing Han Yuan-cheng Cao Languang Lu Jinyu Wen Shijie Cheng Minggao Ouyang School of Electrical and Electronic Engineering Huazhong University of Science and TechnologyWuhan 430074HubeiChina State Key Laboratory of Automotive Safety and Energy Tsinghua UniversityBeijing 100084China Energy and Electricity Research Center Jinan UniversityZhuhai 519070GuangdongChina Department of Mechanical Engineering Imperial College LondonLondon.SW7:2AZ.UK

Providing early safety warning for batteries in real-world applications is *** this study,comprehensive thermal abuse experiments are conducted to clarify the multidimensional signal evolution of battery failure under various preload *** time-sequence relationship among expansion force,voltage,and temperature during thermal abuse under five categorised stages is *** characteristic peaks are identified for the expansion force,which correspond to venting,internal short-circuiting,and thermal *** particular,an abnormal expansion force signal can be detected at temperatures as low as 42.4°C,followed by battery thermal runaway in approximately 6.5 ***,reducing the preload force can improve the effectiveness of the early-warning method via the expansion ***,reducing the preload force from 6000 to 1000 N prolongs the warning time(i.e.,227 to 398 s)before thermal runaway is *** on the results,a notable expansion force early-warning method is proposed that can successfully enable early safety warning approximately 375 s ahead of battery thermal runaway and effectively prevent failure propagation with module *** study provides a practical reference for the development of timely and accurate early-warning strategies as well as guidance for the design of safer battery systems.

关键词： Lithium-ion battery Thermal runaway Preload force Expansionforce Early warning Multidimensional signal

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高保真电视胸腔镜肺叶切除术模拟

系统仿真学报 2020年第5期32卷 826-836页

作者：彭柳司伟鑫郑睿廖祥云徐东亮王平安武汉理工大学湖北武汉430070 中国科学院深圳先进技术研究院广东深圳518055 香港中文大学计算机科学与工程系香港999077

电视胸腔镜(VATS, Video-assisted thoracoscopic surgery)肺叶切除术仿真系统对外科医生手术培训及规划具有重要价值。为实现高保真电视胸腔镜肺叶切除术的模拟,设计了一套有效模拟VATS手术过程中不同手术操作的肺叶切除术模拟器。采... 详细信息

电视胸腔镜(VATS, Video-assisted thoracoscopic surgery)肺叶切除术仿真系统对外科医生手术培训及规划具有重要价值。为实现高保真电视胸腔镜肺叶切除术的模拟,设计了一套有效模拟VATS手术过程中不同手术操作的肺叶切除术模拟器。采用基于位置的动力学仿真框架实现了手术器械-软组织和软组织间交互作用、软组织切割以及手术缝合操作引起的变形模拟;并采用了Marching Cubes算法对模型进行面绘制,尤其是切割操作的渲染;使用GPU并行计算的方法加速手术模拟和面绘制。实验结果表明,本文方法可实现高保真、稳定、高效的VATS手术仿真效果。

关键词：胸腔镜肺叶切除术交互式仿真形变切割缝合

王阳明“志”与“良知”关系新论——以“知与充与遏者,志也”为中心

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中国哲学史 2024年第4期 83-88页

作者：孔维鑫清华大学哲学系

阳明揭致良知前,“志”在地位和功能上类似于揭致良知后的“良知”。其中“知与充与遏者,志也,天聪明也”一句能够容许“志”具有分辨意念善恶的能力这种强解读,“天聪明”便是对“志能知意念善恶”能力的描述。弱一点的解读方式可以是... 详细信息

阳明揭致良知前,“志”在地位和功能上类似于揭致良知后的“良知”。其中“知与充与遏者,志也,天聪明也”一句能够容许“志”具有分辨意念善恶的能力这种强解读,“天聪明”便是对“志能知意念善恶”能力的描述。弱一点的解读方式可以是“志”结合着“是非之心”一并发挥了“自知”的功能,但认清私意的关键在于志切。其中的机制是“志”籍由其“指向至善性”来区分同已的和异已的意念,籍由其“持续实践性”不断地对于同己的意念便扩充之,对于异已的意念则遏制之。比拟一些学者将晚期“良知自知”解说为“情感主义”的,揭致良知前“志”的“自知”机制则可谓“意志主义”的。

关键词：王阳明志良知自知

Atomically Precise Design of PtSn Catalyst for the Understanding of the Role of Sn in Propane Dehydrogenation

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Precision Chemistry 2024年第6期2卷 245-255页

作者： Hui Ye Lina Cao Minghui Gu Han Nie Qingqing Gu Bing Yang Yunxing Bai Qinxue Nie weixin Huang Junling Lu Institute of Advanced Technology Key Laboratory of Precision and Intelligent ChemistryDepartment of Chemical PhysicsHefei National Research Center for Physical Sciences at the MicroscaleKey Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education InstitutesUniversity of Science and Technology of ChinaHefei 230026P.R.China CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsThe Chinese Academy of SciencesDalian 116023P.R.China

Propane dehydrogenation(PDH),an atom-economic reaction to produce high-value-added propylene and hydrogen with high efficiency,has recently attracted extensive *** severe deactivation of Pt-based catalysts through sintering and coking remains a major challenge in this high-temperature *** introduction of Sn as a promoter has been widely applied to improve the stability and selectivity of the ***,the selectivity and stability of PtSn catalysts have been found to vary considerably with synthesis methods,and the role of Sn is still far from fully *** gain in-depth insights into this issue,we synthesized a series of PtSn/siO_(2)and SnPt/siO_(2)catalysts by varying the deposition sequence and Pt:Sn ratios using atomic layer deposition with precise *** found that PtSn/siO_(2)catalysts fabricated by the deposition of SnO_(x)first and then Pt,exhibited much better propylene selectivity and stability than the SnPt/siO_(2)catalysts synthesized the other way *** demonstrate that the presence of Sn species at the Pt-siO_(2)interface is of essential importance for not only the stabilization of PtSn clusters against sintering under reaction conditions but also the promotion of charge transfers to Pt for high *** the above,the precise regulation of the Sn content is also pivotal for high performance,and the excess amount of Sn might generate additional acidic sites,which could decrease the propylene selectivity and lead to heavy coke *** findings provide deep insight into the design of highly selective and stable PDH catalysts.

关键词： Propane dehydrogenation PtSn catalysts sintering coke formation acidity

血清胆碱酯酶水平与急性脑梗死病情严重程度及预后的相关性

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中国医科大学学报 2016年第5期45卷 417-421页

作者：李春瑶司味鑫赵越王国文张鸿中国医科大学附属盛京医院神经内科沈阳110004

目的探讨血清胆碱酯酶(CHE)水平与急性脑梗死患者的病情严重程度及预后的相关性。方法选择急性脑梗死患者325例作为病例组,另选取体检中心健康体检者101例作为对照组。用速率法测定血清CHE水平。根据梗死灶直径和发病1年后的改良Rankin... 详细信息

目的探讨血清胆碱酯酶(CHE)水平与急性脑梗死患者的病情严重程度及预后的相关性。方法选择急性脑梗死患者325例作为病例组,另选取体检中心健康体检者101例作为对照组。用速率法测定血清CHE水平。根据梗死灶直径和发病1年后的改良Rankin评分(mRS评分)对病例组进行分组。对所收集资料进行统计学分析。结果中小面积脑梗死组血清CHE水平明显高于对照组(P<0.01);大面积梗死组血清CHE水平明显低于对照组(P<0.01)。病例组梗死面积、入院时NIHSS评分、发病1年后的mRS评分均与血清CHE之间存在负相关关系(r=-0.302、-0.232、-0.455,P<0.001)。血清CHE、年龄、入院时NIHSS评分及梗死灶直径可能为脑梗死预后的独立影响因素。结论急性脑梗死患者早期血清CHE水平与患者的梗死面积及病情严重程度相关,可能是脑梗死预后的独立影响因素。

关键词：胆碱酯酶脑梗死预后梗死面积 mRS评分

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交互式基于点的外科手术软组织变形仿真

系统仿真学报 2015年第10期27卷 2380-2386页

作者：山君良司伟鑫李小萌王琼彭延军袁志勇王平安山东科技大学信息科学与工程学院青岛266590 中国科学院深圳先进技术研究院深圳518055 香港中文大学计算科学与工程系武汉大学计算机学院武汉430079

近年来,手术仿真领域中交互式生物力学仿真技术取得了显著的进步,但仍存在一些问题亟需解决。例如,大形变情况下的软组织形变模型,碰撞检测以及体积守恒等。因此提出了一种简单有效的计算框架来解决这些问题。为了更好地在计算机上重现... 详细信息

近年来,手术仿真领域中交互式生物力学仿真技术取得了显著的进步,但仍存在一些问题亟需解决。例如,大形变情况下的软组织形变模型,碰撞检测以及体积守恒等。因此提出了一种简单有效的计算框架来解决这些问题。为了更好地在计算机上重现人体器官的力学性质,采用基于点的方法来模拟大变形下的弹性固体,并且通过引入基于位置的方法模拟手术场景中复杂交互,摩擦过程和体积守恒,较大程度的提高了虚拟手术场景中复杂交互的实时性及稳定性。该方法经过多种基准问题的验证,实验结果表明该计算框架在视觉效果以及稳定性方面的有效性。此外,该变形计算模型可较好的扩展应用于交互式穿刺和剪切仿真中。

关键词：基于点的方法基于位置的方法交互式外科手术仿真生物力学响应变形计算模型

蕨麻正丁醇提取物与有氧运动对高血压大鼠心肌纤维化调控机制

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分子植物育种 2024年第14期22卷 4776-4784页

作者：杨伟鑫南阳职业学院体育学院南阳474550

蕨麻(Potentilla anserina L.,PA)具有很高的营养价值和医疗保健功能,有很大的开发利用潜力。蕨麻正丁醇提取物(Potentilla anserina L.n-butanol extract,PABE)具有心脏保护作用。本研究旨在探讨蕨麻正丁醇提取物(PABE)与有氧运动(RE)... 详细信息

蕨麻(Potentilla anserina L.,PA)具有很高的营养价值和医疗保健功能,有很大的开发利用潜力。蕨麻正丁醇提取物(Potentilla anserina L.n-butanol extract,PABE)具有心脏保护作用。本研究旨在探讨蕨麻正丁醇提取物(PABE)与有氧运动(RE)协同作用对自发性高血压(SHR)大鼠心肌纤维化的影响及其潜在机制。通过设立正常对照组、单独高血压组、单独运动组、不同剂量PABE组以及PABE联合运动组,本研究通过RT-qPCR技术检测了心肌纤维化标志物α-SMA、collagenⅠ、collagenⅢ、MMP-2、MMP-9及TIMP-1的mRNA表达水平,评估了PABE与RE对心肌纤维化的调控效果。结果显示,与高血压模型组相比,PABE处理组和运动组均能显著降低α-SMA、collagenⅠ、collagenⅢ、MMP-2和MMP-9的表达,提高TIMP-1的表达,其中PABE与RE的联合应用效果更为显著。这表明蕨麻正丁醇提取物与有氧运动的结合更有效地抑制了高血压大鼠心肌纤维化的进展,可能通过调节心肌细胞外基质重塑相关基因的表达来发挥作用。本研究为高血压心肌纤维化的综合治疗提供了新的策略和理论依据。

关键词：蕨麻(Potentilla anserina L.) 蕨麻正丁醇提取物(PABE) 有氧运动(RE) 心肌纤维化自发性高血压大鼠(SHR) 心肌细胞外基质重塑