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空间信息引导的双分支实时语义分割算法

北京航空航天大学学报 2025年第1期51卷 19-29页

作者：侯志强戴楠程敏捷李富成马素刚范九伦西安邮电大学计算机学院西安710121 陕西省网络数据分析与智能处理重点实验室西安710121 西安邮电大学通信与信息工程学院西安710121

针对实时语义分割模型大量缩减参数造成特征空间信息损失,以及特征缺少上下文信息导致分割类别预测不准确的问题,提出一种基于空间信息引导的双分支实时语义分割算法。该算法采用双分支结构分别获取特征的空间信息和语义信息,为更好地... 详细信息

针对实时语义分割模型大量缩减参数造成特征空间信息损失,以及特征缺少上下文信息导致分割类别预测不准确的问题,提出一种基于空间信息引导的双分支实时语义分割算法。该算法采用双分支结构分别获取特征的空间信息和语义信息,为更好地保留空间信息,设计了一种空间引导模块(SGM),同时捕获特征的局部信息和周围上下文信息,并通过通道加权给予重要信息更高的权重,有效弥补了图像高分辨率特征在降采样过程中的信息损失;为进一步强化特征的上下文信息表征能力,设计了池化特征增强模块(PFEM),采用不同尺寸的池化核捕获多尺度特征信息,并采用条状池化核对特征之间的长距离依赖关系进行建模,更好地确定分割区域的类别。在Cityscapes和CamVid数据集上对所提算法进行验证,平均交并比分别达到77.4%和74.0%,检测速度分别达到49.1帧/s和124.5帧/s,在保证实时分割的情况下有效提升了精度,获得了良好的语义分割性能。

关键词：图像处理实时语义分割卷积神经网络空洞卷积上下文信息

消防员负重爬楼梯下肢肌肉疲劳特性及评估方法

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清华大学学报(自然科学版) 2025年第1期65卷 165-173页

作者：徐明伟王科刘昱彤王佳戴超冯瑞侯志强北京石油化工学院安全工程学院北京102617 清华大学安全科学学院北京100084 中国地质大学(北京)工程技术学院北京100083 北京科技大学大安全科学研究院北京100083 北京科技大学土木与资源工程学院北京100083

为分析消防员在负重爬楼梯过程中的步态特征及其对能量消耗的影响,该文基于步态参数建立支持向量机(SVM)模型预测能量消耗。实验选取24名受试者先后进行A、B两组实验,分别在无负重和负重条件下进行爬楼梯,采集步态数据并进行统计分析。... 详细信息

为分析消防员在负重爬楼梯过程中的步态特征及其对能量消耗的影响,该文基于步态参数建立支持向量机(SVM)模型预测能量消耗。实验选取24名受试者先后进行A、B两组实验,分别在无负重和负重条件下进行爬楼梯,采集步态数据并进行统计分析。结果显示:在负重状态下,受试者步频、步长、跨步长、双脚支撑相、速度显著减小,而能量消耗、单脚支撑相、周期时间等步态参数显著增大。步态参数相关性分析表明,能量消耗与双脚支撑相、周期时间、速度、步长、跨步长之间存在显著关联。该研究构建了SVM模型来预测能量消耗,模型展现出良好的拟合度(R^(2)=0.85836)。对负重爬楼梯过程中的疲劳风险进行评估,发现大多数受试者面临较高的运动强度和疲劳风险。该研究为优化消防员训练和提高其工作效率提供了理论和实证支持。

关键词：高层救援火灾事故下肢肌肉肌肉疲劳负重爬楼梯

不同加载速率对煤岩组合体巴西劈裂特性的影响

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河南理工大学学报（自然科学版） 2025年第1期44卷 29-36页

作者：陈岩王嘉豪邓良涛洪紫杰荣腾龙侯志强河南理工大学能源科学与工程学院河南焦作454000 煤炭安全生产与清洁高效利用省部共建协同创新中心河南焦作454000 河南理工大学土木工程学院河南焦作454000

目的为了研究煤岩组合体在采掘过程中的抗拉特性,方法以煤岩组合体为研究对象,利用RMT-150B实验机对其进行不同加载速率下的巴西劈裂试验,分析加载速率对煤岩组合体劈裂破坏的强度特征、破坏形态、能量特征和裂纹演化的影响。结果结果表... 详细信息

目的为了研究煤岩组合体在采掘过程中的抗拉特性,方法以煤岩组合体为研究对象,利用RMT-150B实验机对其进行不同加载速率下的巴西劈裂试验,分析加载速率对煤岩组合体劈裂破坏的强度特征、破坏形态、能量特征和裂纹演化的影响。结果结果表明:煤岩组合体的应力-应变曲线大致经历了压密阶段、弹性阶段、屈服阶段、破坏阶段,其破坏模式与加载速率无关,均沿着圆盘交界面裂成两半;煤岩组合体的抗拉强度与加载速率呈正相关,加载速率较小时,试样的抗拉强度随加载速率变化十分显著;当加载速率增大时,试样的抗拉强度增幅减小;不同加载速率下,煤岩组合体试样的能量集中在0.33~0.42 J,且试样抗拉强度越大,损伤所需的能量也越大;应力-裂纹应变峰前曲线经历裂纹闭合阶段、弹性阶段、裂纹扩展阶段,轴向裂纹损伤应力与抗拉强度值接近,裂纹参数具有明显的加载速率效应。结论研究结果对于揭示煤岩组合结构拉伸破坏机理具有重要理论价值。

关键词：煤岩组合体巴西劈裂强度特征能量特征裂纹演化

Biomimetic lubricant-grafted surfaces on laser-textured microwell arrays with multifunctionality

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Friction 2024年第12期12卷 2707-2725页

作者： Xiaorui SONG zhiqiang hou Zhehao GAN Yuyao HU Hongyu ZHENG Yongling WU Mingming LIU Centre for Advanced Laser Manufacturing(CALM) School of Mechanical EngineeringShandong University of TechnologyZibo 255000China School of Environmental and Material Engineering Yantai UniversityYantai 264405China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

Recently,various slippery liquid-infused porous surfaces(SLIPS)have been fabricated for the protection of various ***,these SLIPSs are limited by their underlying storage structure and superficial lubricant layer,showing poor ***,inspired by the high-strength structure of Shell nacre’s“brick-mud”layer,we fabricated an all-inorganic composite coating by using wet chemically etched MXene as a brick and an aluminum phosphate binder(AP)as ***,a series of microwell-array structures were designed and prepared on the coating via nanosecond ultrafast laser writing ablation ***,the textured surface was modified by a silane coupling ***-terminated polydimethylsiloxane(PDMS)was tightly grafted onto the porous surface through a thiol-ene click reaction to obtain lubricant grafted texture surface(LGTS).The prepared LGTS showed good lubrication properties for multiple phases,including various liquids,ice crystals,and *** exhibits excellent chemical stability and mechanical durability under deionized water impact,centrifugal test,strong acid solutions,anti/de-icing cycles,and high-intensity ***,the proposed strategy for constructing robust LGTS will greatly promote theoretical research on super wetting interfacial materials and their applications in the fields of antifouling,anti/de-icing,and lubricating protection.

关键词： laser texture lubricant covalent grafting omniphobicity anti-icing

Optimization of high-pressure processing-assisted extraction of pectic polysaccharides from three berries

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Food Quality and Safety 2023年第1期7卷 1-12页

作者： Xinxin Hu Chengxiao Yu Shokouh Ahmadi Yuying Wang Xingqian Ye zhiqiang hou Shiguo Chen College of Biosystems Engineering and Food Science National-Local Joint Engineering Laboratory of Intelligent Food Technology and EquipmentZhejiang Key Laboratory for Agro-Food ProcessingZhejiang Engineering Laboratory of Food Technology and EquipmentZhejiang UniversityHangzhouChina Zhejiang University Zhongyuan Institute ZhengzhouChina Shandong(Linyi)Institute of Modern Agriculture Zhejiang UniversityLinyiChina Fuli Institute of Food Science Zhejiang UniversityHangzhouChina Ningbo Research Institute Zhejiang UniversityHangzhouChina

Background and objectives:High-pressure processing(HPP)is a promising assistive method to extract pectic polysaccharides with high rhamnogalacturonan I(RG-I)domain and berries are sources of such pectic *** study extracts pectic polysaccharides from goji berry,raspberry,and cranberry,examines how HPP influences the pectic polysaccharide structure of three berries,and provides a basis for the extraction and modification of pectic polysaccharides with specific structure and *** and methods:An orthogonal test was performed to optimize the HPP-assisted alkali method to extract the high yield and high RG-I content pectic polysaccharides from three *** information of pectic polysaccharides extracted by the HPP method and conventional methods were compared from the perspectives of monosaccharide composition,molecular weight,Fourier transform infrared spectroscopy,***:For raspberry,the optimal conditions consisted of a pressure of 50o MPa,a pH of 13,and a pressure-holding time of 12 min,while the optimal conditions for goji berry and cranberry were both 40o MPa,pH 13,and 15 *** the optimal conditions,the yields for goji berry,raspberry,and cranberry were 10.49%,16.63%,and 17.52%,respectively,and RG-l contents were 81.85%,83.30%,and 63.22%,*** showed an effect to degrade homogalacturonan backbones and side chains and increase the RG-I content to some ***:HPP-assisted alkali method was revealed to be an efficient method to extract high RG-I content pectic polysaccharides,especially for cranberry,and was a potential method to modify pectic polysaccharide structure in a certain way.

关键词： Pectic polysaccharide High-pressure processing Rhamnogalacturonan-I Structural characteristics

Cotransport of nanoplastics with nZnO in saturated porous media:From brackish water to seawater

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Journal of Environmental Sciences 2025年第2期148卷 541-552页

作者： Yuanzhang hou Yange Wang Yidi Zhang Zhibo Lu Zhenbo Zhang zhiqiang Dong Yuping Qiu Department of Environmental Science College of Environmental Science and EngineeringTongji UniversityState Key Laboratory of Pollution Control and Resources ReuseShanghai Institute of Pollution Control and Ecological SecurityShanghai 200092China School of Medicine Tongji UniversityShanghai 200065China Municipal Environmental Protection Engineering Co. Ltd of CERC Shanghai GroupShanghai 201906China China Railway Engineering Group Co. Beijing 100039China

The ocean serves as a repository for various types of artificial ***(NPs)and nano zinc oxide(nZnO),which are frequently employed in personal care products and food packaging materials,are likely simultaneously released and eventually into the ocean with surface ***,their mutual influence and shared destiny in marine environment cannot be *** study examined how nanomaterials interacted and transported through sea sand in various salinity *** showed that NPs remained dispersed in brine,while nZnO formed *** seawater of 35 practical salinity units(PSU),nZnO formed heteroaggregates with NPs,inhibiting NPs mobility and decreasing the recovered mass percentage(Meff)from 24.52%to 12.65%.In 3.5 PSU brackish water,nZnO did not significantly aggregate with NPs,and thus barely affected their ***,NPs greatly enhanced nZnO transport with Meff increasing from 14.20%to 25.08%,attributed to the carrier effect of higher mobility *** from brackishwater to seawater was simulated in salinity change experiments and revealed a critical salinity threshold of 10.4 PSU,below which the mobility of NPs was not affected by coexisting nZnO and above which nZnO strongly inhibited NP *** study highlights the importance of considering the mutual influence and shared destiny of artificial nanoparticles in the marine environment and how their interaction and cotransport are dependent on changes in seawater salinity.

关键词： Homoaggregate Heteroaggregate Transport Sea sand Salinity threshold

Study on the relative radiometric correction of CBERS satellite CCD image

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Science China(Technological Sciences) 2005年第S2期48卷 12-28页

作者： GUO Jianning, YU Jin, ZENG Yong, XU Jianyan, PAN zhiqiang & hou Minghui China Center for Resource Satellite Data and Application, Beijing 100830, China China Ctr Resource Satellite Data & Applicat Beijing 100830 Peoples R China

The main payload on CBERS-01/02 of China-Brazil Earth Resources Satellite (CBERS) is a push-broom CCD camera with moderate spatial and radiant resolution. Because at lab the data for calibration at satellite assembly stage were unable to be collected, and also because the onboard calibrator after launch was in a different state from imaging, the calibration of CCD image got a series of difficulties involved. In practice, two methods are used in the processing on the ground station: One is extracting calibration data by statistics from the image itself, and the other is the method of histogram match. It was proved that the latter can calibrate the image much better, because it can remove the effect of unstable response of the camera largely and also can overcome the nonlinearity of the camera basically by using Look-Up Table (LUT) calculated from histogram statistics of different temporal images. Considering the problems of CBERS-01, a lot of calibration tests were done before the launch of CBERS-02, in which a set of lab coefficients for relative calibration was formulated after the data collection by using integration-hemisphere in the stage of satellite assembly test. During the on-orbit test, it was found that the calibration result from such coefficients was not satisfying, especially there being response difference between 3 detector arrays, which was attributed to the unstable dark currents of the CCD camera. This paper comes up with a statistic method to remove such response difference. In this method the middle detector array was used as reference to find the response differences of adjacent similar features between these arrays and it was proved to have a broad adaptability.

关键词： CBERS satellite CCD camera relative radiometric calibration relative radiometric correction assembly test.

Structural Basis for the Interaction of 14-3-3<i>β</i>with Tricarboxylic Acid Cycle Intermediate Malate

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Journal of Biosciences and Medicines 2017年第8期5卷 36-47页

作者： zhiqiang hou Lijing Su Xiaoyan Liu Department of Biophysics Dallas USA Center for Alzheimer and Neurodegenerative Disease Dallas USA Center for the Genetics of Host Defense Dallas USA Department of Microbiology University of Texas Southwestern Medical Center Dallas USA

The protein family of 14-3-3(s) has risen to a position of higher importance as an adaptor protein in cell biology. The seven highly conserved human 14-3-3 proteins coordinate diverse cellular processes including apoptosis, DNA damage response, protein trafficking, and others. In liver hepatocytes, 14-3-3β binds to Ser196-phosphorilated glucose-responsive carbohydrate response element-binding protein (ChREBP) to inhibit converting excess carbohydrate to fat by regulating the nuclear/cytosol trafficking of ChREBP. Here, we report X-ray crystal structures of homodimeric mammalian 14-3-3β in its apo, Malate-bound forms. The determined apo structure was captured with one monomer in the closed state, whereas the other one had an open conformation. Strikingly, 14-3-3β binds Malate dynamically with a double-closed state, which is distinct from all previously characterized 14-3-3(s) and target ligand-binding modes. Malate docks into a first-time observed cofactor pocket located at the concaved interface of 14-3-3β helices α2, α3, α4 through mainly electrostatic and hydrogen interactions. Such a Tricarboxylic Acid Cycle intermediate Malate bond model might offer a new approach to further analyze insulin-independent 14-3-3/ChREBP pathway of de novo fat synthesis in the liver.

关键词： Crystal Structure 14-3-3 Protein ChREBP Transcription Activation Malate Malic Acid

The influence of space environmental factors on the laser-induced damage thresholds in optical components

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High Power Laser Science and Engineering 2024年第4期12卷 79-89页

作者： Bin Ma Shuang Guan Dongyue Yan Qiaofei Pan zhiqiang hou Ke Wang Jiaqi Han Institute of Precision Optical Engineering School of Physics Science and EngineeringTongji UniversityShanghaiChina MOE Key Laboratory of Advanced Micro-Structured Materials Tongji UniversityShanghaiChina Shanghai Frontiers Science Center of Digital Optics Tongji UniversityShanghaiChina Shanghai Professional Technical Service Platform for Full-Spectrum and High-Performance Optical Thin Film Devices and Applications Tongji UniversityShanghaiChina

This paper systematically investigated the impact mechanisms of proton irradiation,atomic oxygen irradiation and space debris collision,both individually and in combination,on the laser damage threshold and damage evolution characteristics of HfO_(2)/SiO_(2) triple-band high-reflection films and fused silica substrates using a simulated near-Earth space radiation experimental *** the high-reflection film samples,the damage thresholds decreased by 15.38%,13.12% and 46.80% after proton,atomic oxygen and simulated space debris(penetration) irradiation,*** coupling irradiation of the first two factors resulted in a decrease of 26.93%,while the combined effect of all the three factors led to a reduction of 63.19%.Similarly,the fused silica substrates exhibited the same pattern of laser damage performance ***,the study employed high-precision fixed-point in situ measurement techniques to track in detail the microstructural changes,surface roughness and optical-thermal absorption intensity before and after proton and atomic oxygen irradiation at the same location,thus providing a more accurate and comprehensive analysis of the damage *** addition,simulations were conducted to quantitatively analyze the transmission trajectories and concentration distribution lines of protons and atomic oxygen incident at specific angles into the target *** research findings contribute to elucidating the laser damage performance degradation mechanism of transmissive elements in near-Earth space environments and provide technical support for the development of high-damage-threshold optical components resistant to space radiation.

关键词： coupling effects laser-induced damage thresholds optical components space environments