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Repeated release of cerium oxide nanoparticles altered algal responses:Growth,photosynthesis,and photosynthetic gene expression

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Eco-Environment & Health 2024年第3期3卷 290-299页

作者： Saibo Liu Jingheng Han Xiaowu Ma Xiaoshan Zhu Han Qu Guorong Xin xiaochen huang State Key Lab of Biocontrol Guangdong Provincial Key Laboratory of Plant ResourcesSchool of Agriculture and BiotechnologyShenzhen Campus of Sun Yat-sen UniversityShenzhen 518107China College of Ecology and Environment Hainan UniversityHaikou 570228China College of Environment and Ecology Key Laboratory of the Three Gorges Reservoir Region's Eco-EnvironmentMinistry of EducationChongqing UniversityChongqing 400045China

The expanding production of engineered nanomaterials(ENMs)can eventually cause their increased release into and presence in aquatic ecosystems,potentially threatening the health of aquatic organisms and the stability of the ecological ***,ENMs are repeatedly released into real-world aquatic environments in relatively low concentrations,potentially affecting photosynthesis in primary producers such as ***,knowledge regarding the effects of repeated exposure to ENMs on algal photosynthesis is still ***,the physiological responses of the freshwater algae Chlorella vulgaris following single and repeated exposures to cerium oxide nanoparticles(CeO2 NPs)were investigated at 10 mg/L,with a focus on *** results showed that repeated exposures triggered increased photosynthetic pigment contents,oxidative stress levels,decreased photosynthetic performance,and lower biomass in *** compared to a single ***-related genes(i.e.,petA,petB,psaA,atpB,and rbcL)were found to be upregulated following repeated *** for petB,repeated rather than single exposure treatment significantly upregulated its expression levels by 2.92–10.24-fold compared to unexposed ***,increased exposure times could aggravate the interaction between CeO2 NPs and algae,elevating 8.13%,12.13%,and 20.51%Ce distribution on the algal cell surface or intracellularly,compared to a single *** study is the first to investigate the effects of ENM exposure times on algal photosynthesis,providing new insights into the assessment of the risks these materials pose to real-world aquatic environments.

关键词： Cerium oxide nanoparticles Environmental risks Repeated exposures Algae Photosynthesis Gene expression level

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轴向柱塞泵智能化关键技术研究进展及发展趋势

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机械工程学报 2024年第4期60卷 32-49页

作者：张军辉刘施镐徐兵黄伟迪吕飞黄晓琛浙江大学流体动力基础件与机电系统全国重点实验室杭州310027

轴向柱塞泵是航空航天、远洋船舶、工程机械等高端装备液压系统的“心脏”,为液压系统输送具有稳定压力、流量的传动“血液”。轴向柱塞泵的可靠性和安全性直接影响液压系统甚至整机的性能,因此,利用智能化技术对其实现预测性维护是近... 详细信息

轴向柱塞泵是航空航天、远洋船舶、工程机械等高端装备液压系统的“心脏”,为液压系统输送具有稳定压力、流量的传动“血液”。轴向柱塞泵的可靠性和安全性直接影响液压系统甚至整机的性能,因此,利用智能化技术对其实现预测性维护是近年来的研究热点。同时,装备无人化和智能化的发展趋势也使得轴向柱塞泵的智能化技术受到重点关注。为探明轴向柱塞泵智能化技术的发展方向,给出其高质量发展的可行路径,从智能状态监测、智能故障诊断、智能寿命预测和智能决策调控四个方面系统性地综述轴向柱塞泵智能化技术的发展历程和研究现状。探讨轴向柱塞泵智能化关键技术的现有问题及难点,总结智能化关键技术发展面临的挑战,并对未来发展趋势进行展望。

关键词：轴向柱塞泵智能化故障诊断寿命预测状态监测

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机器学习与计算机视觉技术在食品质量评价中的研究进展

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食品科学 2024年第12期45卷 1-10页

作者：黄晓琛张凯利刘元杰陈洪黄凤洪魏芳中国农业科学院油料作物研究所油料脂质化学与营养湖北省重点实验室油料油脂加工技术国家地方联合工程实验室湖北武汉430062 中国农业大学信息与电气工程学院农业农村部农业信息获取技术重点实验室北京100083 湖北洪山实验室湖北武汉430070

近年来,随着社会对食品质量和安全的关注度不断提高,计算机视觉技术在食品质量评价领域逐渐受到重视并开始广泛应用。通过学习技术,如人工神经网络、卷积神经网络和支持向量机等,研究人员能够利用大量的食品图像和相关数据进行训练,从... 详细信息

近年来,随着社会对食品质量和安全的关注度不断提高,计算机视觉技术在食品质量评价领域逐渐受到重视并开始广泛应用。通过学习技术,如人工神经网络、卷积神经网络和支持向量机等,研究人员能够利用大量的食品图像和相关数据进行训练,从而实现对食品质量的自动评估和监测。特别是深度学习技术的发展,使得计算机能够更加准确地识别食品的外观、形状、颜色等特征,进而对其进行分类、预测和质量检测。除了在食品质量评价中的常规应用,学习技术还被用于更复杂的任务,如食品缺陷检测、异物检测、新鲜度评估等。这些技术不仅可以提高食品生产和加工的效率,还能够减少人为因素带来的误差,从而确保食品质量和安全。然而,尽管学习技术在食品质量评价中的应用取得了显著进展,但仍然存在一些挑战需要克服。例如,食品图像数据集的获取和标注成本较高,数据质量和数量的不足可能会影响模型的性能和泛化能力。此外,模型的可解释性和透明性也是一个重要问题,尤其是在需要对食品质量评价结果做出解释或决策的情况下。因此,未来的研究需要继续探索如何提高数据集的质量和规模、优化模型的鲁棒性和可解释性,以及开发更加高效和可持续的食品质量评价系统。

关键词：机器学习食品质量计算机视觉食品检测

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简易肺部超声评分法对乳腺癌术后放疗后放射性肺损伤的评估

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中国超声医学杂志 2024年第8期40卷 875-879页

作者：张伟夏祯尹克杰刘尧赫黄骁辰缪青南京医科大学附属肿瘤医院超声科南京大学医学院附属鼓楼医院医学影像科南京医科大学附属肿瘤医院医学装备部南京医科大学附属肿瘤医院病理科

目的本研究旨在评估简易超声肺部评分法在乳腺癌术后放疗后放射性肺损伤(RILI)中的有效性。方法研究共纳入67例单侧乳腺癌术后放疗后患者。通过两胸八分区简易经胸肺部超声评分法对患侧及健侧肺部情况进行探查，分别记录各个分区的B... 详细信息

目的本研究旨在评估简易超声肺部评分法在乳腺癌术后放疗后放射性肺损伤(RILI)中的有效性。方法研究共纳入67例单侧乳腺癌术后放疗后患者。通过两胸八分区简易经胸肺部超声评分法对患侧及健侧肺部情况进行探查，分别记录各个分区的B线、胸膜和并发症情况并评分，相加得到简易肺部超声评分，分析放疗剂量及放疗时间对评分的影响，以高分辨率CT为标准，评估简易肺部超声评分法对RILI的诊断价值。结果患侧简易肺部超声评分显著高于健侧，胸膜评分与B线评分呈正相关，并发症评分与放疗时间和胸膜评分呈正相关。简易肺部超声评分法评估中-重度肺间质损伤的受试者工作特征(ROC)曲线下面积(AUC)为0.867。结论简易肺部超声评分法能快速有效识别乳腺癌术后放疗导致的中至重度RILI,有望成为评估RILI严重程度的影像学指标。

关键词：肺部超声放射性肺损伤量化评分

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Coupled evolution of piston asperity and cylinder bore contour of piston/cylinder pair in axial piston pump

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Chinese Journal of Aeronautics 2023年第8期36卷 395-407页

作者： Fei LYU Junhui ZHANG Shoujun ZHAO Kun LI Bing XU Weidi huang Haogong XU xiaochen huang State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China Beijing Institute of Precision Mechatronics and Controls Beijing 100076China Qing’an Group Co. Ltd.Xi’an 710077China

The wear condition of the piston/cylinder pair is crucial to the performance and reliability of the axial piston *** hard piston surface,the soft cylinder bore surface,and the interface oil film affects each other during the wear ***,in the mixed lubrication region,the geometry of the hard piston surface asperity directly affects the wear of soft cylinder bore surface,while the asperities may deform or even degrade when penetrating and sliding against the cylinder *** far,there is no suitable method to simulate their coupled *** paper proposed a wear process simulation model considering the real-time interaction between the elasto-plastic deformation of the piston surface asperity,the wear contour of the cylinder bore,and the lubrication condition of the *** offline library of the elasto-plastic constitutive behavior of the asperity based on the finite element method(FEM)is established as a part of the simulation model to precisely analyze the deformation and degradation of the asperity and quickly invoke them in the numerical wear process *** simulation and experimental results show that the piston asperity and the cylinder bore contour converge to a steady state after running-in for about 0.5 *** distribution of the simulated asperity degradation and wear depth is also verified by the experiment.

关键词： Asperity Contour Coupled evolution Piston/cylinder pair Wear process

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Effect of complex hydraulic variables and physicochemical factors on freshwater mussel density in the largest floodplain lake,China

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Ecological Processes 2023年第1期12卷 232-245页

作者： Chenchen Jia Chenhuizi Wu xiaochen huang Chunhua Zhou Shan Ouyang Xiongjun Liu Xiaoping Wu School of Life Sciences Nanchang UniversityNanchang 330031China Guangdong Provincial Key Laboratory of Conservation and Precision Utilization of Characteristic Agricultural Resources in Mountainous Areas School of Life SciencesJiaying UniversityMeizhou 514015China

Background Habitat degradation and flow regime alterations are two of the most prominent and common impact factors to freshwater mussel *** of the correlation between freshwater mussel distribution,density and habitat characteristics is important for maintaining and restoring their biodiversity and ecological *** on predicting habitat suitability of freshwater mussels is lacking in ***,we aimed to analyze the correlation between freshwater mussel density and complex hydraulic and physicochemical variables to predict habitat *** The results showed that four complex hydraulic variables(boundary Reynolds number,critical shear stress,bed roughness and mean sediment particle size)and four physicochemical variables(water temperature,chlorophylla,transparency and pH)were key factors for predicting habitat suitability of freshwater *** mussel density was significantly correlated with Froude number,water temperature and *** Our results confirmed that higher freshwater mussel density would be associated with areas that are stable in complex hydraulic and physicochemical *** results provide an important insight into the conservation of freshwater mussel diversity and their habitat restoration in China and globally.

关键词： Habitat suitability Freshwater mussel Complex hydraulic variable Habitat degradation

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Performance optimization for high speed axial piston pump considering cylinder block tilt

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中国航空学报:英文版 2023年第9期36卷 437-450页

作者： Haogong XU Junhui ZHANG Shoujun ZHAO Junyuan CHEN Weidi huang xiaochen huang Fei LYU Qi SU Bing XU State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310058China Beijing Institute of Precision Mechatronics and Controls Beijing 100076China Jiangsu Jinling Intelligent Manufacturing Research Institute Co LtdNanjing 210006China

Increasing the rotating speed is considered as an efficient approach to upgrade the power-to-weight ratio in an axial piston pump,but penalized by more leakage and more severe wear resulting from the adverse cylinder block *** studies mainly focused on the bearing characteristic of the valve plate/cylinder block pair,but the spline coupling also plays a key role in the undesired cylinder block tilt,which has been little studied.A theoretical model for the rotating assembly is presented to investigate the effect of the spline coupling length on the cylinder block tilt and the performance of the valve plate/cylinder block pair.A typical high-speed axial piston pump with the displacement of 5.2 mL/r at 10000 r/min was studied by simulation and *** shows that the optimal spline coupling length is one value increased by 2 mm from the original,bringing a remarkable leakage reduction under the high-speed condition by decreasing the cylinder block tilting *** experiment result matches well with the *** influences of the spline coupling on the cylinder block tilt and the leakage were demonstrated.

关键词： Cylinder block tilt High-speed axial piston pump Leakage Spline coupling Wear

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Effects of different atmospheres on the arc erosion behaviors of Ti_(3)SiC_(2)cathodes

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Science China(Technological Sciences) 2021年第3期64卷 620-628页

作者： ZHOU ZiJue FENG Yi ZHAO Hao QIAN Gang ZHANG JingCheng ZHANG XueBin huang xiaochen School of Materials Science and Engineering Hefei University of TechnologyHefei 230009China Instrumental Analysis Center Hefei University of TechnologyHefei 230009China School of Material and Chemical Engineering Bengbu UniversityBengbu 233030China

The effects of ambient atmospheres on the arc erosion behaviors of Ti_(3)SiC_(2)cathodes were investigated at 5.5 kV in argon,nitrogen,air,and *** mass loss of the cathodes increased in the order of argon,nitrogen,air,and oxygen and the morphologies were measured by 3D laser scanning confocal microscope with a gradual blooming *** spectroscopy,X-ray diffraction,and X-ray photoelectron spectroscopy were employed to detect the components of erosion *** erosion-chemical products mainly consisted of TiNx in nitrogen,TiN_(x),TiO_(2)and SiO_(2)in air,TiO_(2)and SiO_(2)in *** arc energy was responsible for the arc erosion characteristics in different atmospheres.

关键词： Ti_(3)SiC_(2) atmosphere arc erosion

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Arc corrosion behavior of Cu-Ti_3AlC_2 composites in air atmosphere

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Science China(Technological Sciences) 2018年第4期61卷 551-557页

作者： huang xiaochen FENG Yi QIAN Gang ZHAO Hao SONG ZhaoKun ZHANG JingCheng ZHANG XueBin School of Materials Science and Engineering Hefei University of TechnologyHefei 230009China Instrumental Analysis Center Hefei University of TechnologyHefei 230009China

The arc corrosion evolution of Cu-20 vol.% Ti_3 AlC_2 cathodes is presented here. After eroded by 3, 4, 5, 6, 7, 8, 9, 10 kV DC voltage, respectively, the surface morphologies were characterized by field emission scanning electron microscope with craters and protrusions. Compared to small craters and dense protrusions of the morphology by high voltage, the eroded surface was covered with bigger craters and sparse protrusions at low voltage. No crack was discovered on the surface even at 10 kV. By means of energy dispersive spectroscopy and Raman spectroscopy, the decomposition of Cu-20 vol.% Ti_3 AlC_2 cathode to CuO,Al__2 O_3 and TiO_2 were proved. Meanwhile, W anode is oxidized to WO_2. The peak current increases with the increasing breakdown voltage, which is recorded by a digital memory oscilloscope.

关键词： Cu-Ti_3AlC_2 arc erosion FE-SEM Raman spectroscopy

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大健康产业背景下基于产教研融合的“食品工艺学”课程改革探索

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农产品加工 2024年第2期 123-125页

作者：黄晓辰梁乐欣蔡友华马金魁肇庆学院食品与制药工程学院广东肇庆526061 广东肇庆星湖生物科技股份有限公司广东肇庆526040

在国家战略布局与国民健康需求双重驱动的背景下,大健康产业发展步入快车道,对食品专业人才的培养提出了新要求。“食品工艺学”是食品类专业的主干课程,服务于食品开发、生产及质量控制方面应用型专业人才的培养。课程团队立足于新形... 详细信息

在国家战略布局与国民健康需求双重驱动的背景下,大健康产业发展步入快车道,对食品专业人才的培养提出了新要求。“食品工艺学”是食品类专业的主干课程,服务于食品开发、生产及质量控制方面应用型专业人才的培养。课程团队立足于新形势下大健康产业发展需求,以产教研融合为抓手,提出推进“食品工艺学”课程教学改革的具体策略,旨在培养出适应区域经济社会发展需求的高素质应用型食品专业人才,助力食品产业的健康发展。

关键词：产教研融合食品工艺学大健康课程改革

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