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基于改进DeepLabV3+的非结构化道路可行驶区域检测

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中国农机化学报 2025年第2期46卷 271-278页

作者：段小勇何超刘学渊西南林业大学机械与交通学院昆明市650224

为实现非结构化林间道路可行驶区域的快速准确识别,针对林间道路边界不明显、道路形状不规范以及道路覆盖等问题,提出一种基于改进DeepLabV3+的林地非结构化道路分割模型。使用MobileNetV3网络代替传统DeepLabV3+主干网络以实现轻量化设... 详细信息

为实现非结构化林间道路可行驶区域的快速准确识别,针对林间道路边界不明显、道路形状不规范以及道路覆盖等问题,提出一种基于改进DeepLabV3+的林地非结构化道路分割模型。使用MobileNetV3网络代替传统DeepLabV3+主干网络以实现轻量化设计,使图像分割速度及实时性显著提升;在主干网络解码器部分引入CBAM注意力机制,通过对ASPP模块参数调整,增强对非结构化道路在边界区域的特征提取与识别;采用融合损失函数,提高模型收敛速率及准确度,避免模型在复杂环境下出现错误检测区域。结果表明,改进后的DeepLabV3+检测平均帧数提升26.69帧/s,较原模型检测速率提升约54%,检测准确率提升至91.26%,同时,在强光、逆光以及路面积水等多种情况下均未出现漏检、误检和边界分割不清晰等现象,为非结构化道路自动驾驶提供技术参考。

关键词：非结构化道路语义分割 DeepLabV3+ 注意力机制损失函数

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交叉上市企业信息披露规制与股价崩盘风险--来自新《证券法》实施的经验证据

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财经论丛 2025年第1期 80-91页

作者：王夺李延喜何超胡云戈大连理工大学经济管理学院辽宁大连116024

对于同一信息,交叉上市企业在不同市场进行披露的时点可能存在差异,这会导致投资者产生不同反应,进而引发股价出现不同程度的波动,2020年颁布的新《证券法》对此进行了关注与规制。本文以2017-2022年A股上市公司为样本,采用双重差分模... 详细信息

对于同一信息,交叉上市企业在不同市场进行披露的时点可能存在差异,这会导致投资者产生不同反应,进而引发股价出现不同程度的波动,2020年颁布的新《证券法》对此进行了关注与规制。本文以2017-2022年A股上市公司为样本,采用双重差分模型从股价崩盘风险视角检验了新《证券法》对交叉上市企业信息披露的规制效果。研究发现,新《证券法》实施后,相较于非交叉上市企业,交叉上市企业的股价崩盘风险显著降低,且该过程主要通过降低投资者意见分歧与减少管理层坏消息隐藏机制实现。异质性分析发现,当管理层具有较高坏消息隐藏动机或隐藏机会,投资者信息环境较为恶劣时,新《证券法》实施效果更为凸显。本文研究结果表明,新《证券法》实施为资本市场互联互通提供了法律保障,通过完善信息披露制度有效促进我国资本市场稳定并推动企业国际化进程。

关键词：交叉上市信息披露规制股价崩盘风险新《证券法》

劳动价值论视角下生态产品价值实现机制的系统构建

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价格月刊 2025年第2期 1-8页

作者：贺超蒋雯文崔权雪北京林业大学经济管理学院北京100083

生态产品价值实现与“两山”理念一脉相承,是对马克思劳动价值论的丰富和发展,体现了党和国家推进生态文明建设的坚定决心。现有的生态产品内涵尚未形成科学共识,理论研究滞后实践的困境尤为突出。通过剖析生态产品价值构成,厘清了建构... 详细信息

生态产品价值实现与“两山”理念一脉相承,是对马克思劳动价值论的丰富和发展,体现了党和国家推进生态文明建设的坚定决心。现有的生态产品内涵尚未形成科学共识,理论研究滞后实践的困境尤为突出。通过剖析生态产品价值构成,厘清了建构生态产品价值实现机制的内在逻辑;从排他性、非竞争性等属性出发,提出了以明晰产权建构生态产品价值实现机制的实践优化方向;讨论了设置、界定产权和维护产权的交易成本约束问题。基于研究结论,提出了以生态产品价值实现统筹国土、自然资源资产登记确权工作,创新以价值实现为导向的生态产品产权体系,强化技术支撑,降低产权路径交易成本,进一步聚焦纯公共资源类生态产品的保护,引导推动生态产业化来强化产权路径的效果等对策建议。

关键词：生态产品价值实现机制劳动价值论 “两山”理念产权

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Single probes and resonant four-wave-mixing enabling novel correlative light electron microscopy workflow

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Light(Science & Applications) 2023年第6期12卷 933-934页

作者： Long Chen chao he Division of Structural Biology Wellcome Trust Centre for Human GeneticsUniversity of OxfordOxford OX37BNUK Department of Engineering Science University of OxfordOxford OX13PJUK

Correlative light electron microscopy prefers single probes with stable performance in both optical and electron *** researchers have shown how to harness gold nanoparticles featuring exceptional photostability and fo... 详细信息

关键词： mixing wave exceptional

Towards higher-dimensional structured light

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Light(Science & Applications) 2022年第8期11卷 1650-1666页

作者： chao he Yijie Shen Andrew Forbes Department of Engineering Science University of OxfordParks RoadOxfordOX13PJUK Optoelectronics Research Centre University of SouthamptonSouthamptonSO171BJUK School of Physics University of the WitwatersrandPrivate Bag 3Johannesburg2050South Africa

Structured light refers to the arbitrarily tailoring of optical fields in all their degrees of freedom(DoFs),from spatial to *** orbital angular momentum(OAM)is perhaps the most topical example,and celebrating 30 years since its connection to the spatial structure of light,control over other DoFs is slowly gaining traction,promising access to higher-dimensional forms of structured ***,harnessing these new DoFs in quantum and classical states remains challenging,with the toolkit still in its *** this perspective,we discuss methods,challenges,and opportunities for the creation,detection,and control of multiple DoFs for higher-dimensional structured *** present a roadmap for future development trends,from fundamental research to applications,concentrating on the potential for larger-capacity,higher-security information processing and communication,and beyond.

关键词： light dimensional slowly

Homeostasis of Synapses:Expansion During Wakefulness,Contraction During Sleep

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Neuroscience Bulletin 2017年第3期33卷 359-360页

作者： chao he Zhian Hu Department of Physiology Collaborative Innovation Centerfor Brain ScienceThird Military Medical UniversityChongqing 400038China

Sleep is a universal biological process occurring in almost every species of animal,and the loss of sleep has detrimental effects,especially impairments in cognition[1,2].Yet,the neuronal function of sleep is still on... 详细信息

关键词： synaptic neuronal homeostasis universal potentiation hypothesis cognition Homer shrinkage greatest

On inertial navigation and attitude initialization in polar areas

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Satellite Navigation 2020年第1期1卷 40-45页

作者： Yuanxin Wu chao he Gang Liu Shanghai Key Laboratory of Navigation and Location-based Services School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Flight Automatic Control Research Institute Xi’an 710065China

Inertial navigation and attitude initialization in polar areas become a hot topic in recent years in the navigation community,as the widely-used navigation mechanization of the local level frame encounters the inherent singularity when the latitude approaches 90°.Great endeavors have been devoted to devising novel navigation mechanizations such as the grid or transversal *** paper highlights the fact that the common Earth-frame mechanization is sufficiently good to handle the singularity problem in polar *** results are reported to demonstrate the singularity problem and the effectiveness of the Earth-frame mechanization.

关键词： Inertial navigation Mechanization Polar areas Attitude initialization

Sleep Disturbance: An Early Sign of Alzheimer’s Disease

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Neuroscience Bulletin 2020年第4期36卷 449-451页

作者： chao he Zhian Hu Chenggang Jiang Department of Physiology Institute of Brain and IntelligenceThird Military Medical UniversityChongqing 400038China Department of Medical Psychology Chongqing Health Center for Women and ChildrenChongqing 400021China Department of Sleep and Psychology Daping HospitalThird Military Medical UniversityChongqing 400042China

Alzheimer's disease(AD)is a progressive neurodegenerative disorder associated with cognitive impairment in older *** accumulation of insoluble forms of amyloid-β(Aβ)in plaques in extracellular spaces and the aggregation of hyperphosphorylated microtubule-associated protein tau in neurofibrillary tangles in neurons are considered to be central pathological features of A D[1,2].

关键词： Alzheimer Aβ tau

OFDMA-PON with MQAM downlink for flexible allocation

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Journal of Systems Engineering and Electronics 2019年第6期30卷 1090-1095页

作者： he chao WANG Ruyan TAN Zefu TAN Xiang’an Key Laboratory of Ubiquitous Sensing and Networking in Chongqing Chongqing University of Posts and TelecommunicationsChongqing 400065China School of Communication and Information Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065China Key Laboratory of Signal and Information Processing Chongqing Three Gorges UniversityChongqing 404100China Operation&Maintenance Department of Wanzhou Branch China UnicornChongqing 404100China

In this paper, the 40-Gbps orthogonal frequency division multiple access(OFDMA) technology enabled by subcarrier allocation in the form of integrated architecture for the intra-cell is proposed in the downlink transmission passive broadband optical access system. The data-carrying subcarriers in the inverse fast Fourier transform/fast Fourier transform(IFFT/FFT) size of1 024 points are successfully divided into three sub-channels,in which each sub-channel has 256 useful subcarriers, by using adaptive dynamic bandwidth allocation(DBA). Taking the inherent advantages of M-ary quadrature amplitude modulation(MQAM)modulation mechanism into account, the performance of the absolutely identical MQAM format over the different sub-channels for the downstream OFDMA-passive optical network(PON) is investigated based on the intensity modulation direct detection(IMDD) system by simulations. The results show that three parallel4 QAM or 16 QAM or 64 QAM OFDMA data, which are transmitted over three sub-channels, is more suitable for different sub-channel allocations, respectively. In addition, comparing with single port4/16/64 QAM OFDM over the same access system, the receiver sensitivity economizes – 0.6 d Bm, 0.6 d Bm, 4.6 d Bm at the bit error rate(BER) value of 10-3 respectively.

关键词： orthogonal frequency division multiple access(OFDMA) passive optical network(PON) downlink transmission dynamic bandwidth allocation(DBA).