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Huizhou Movement and its significance in Pearl River Mouth Basin, China

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Petroleum Exploration and Development 2020年第3期47卷 483-498页

作者： SHI Hesheng DU Jiayuan MEI Lianfu ZHANG Xiangtao HAO Shihao LIU Pei deng peng ZHANG Qin Exploration Department of CNOOC Ltd. Beijing 100010China Shenzhen Branch of CNOOC Ltd. Shenzhen 518000China Key Laboratory of Tectonics and Petroleum Resources Ministry of EducationChina University of GeosciencesWuhan 430074China

The Huizhou Movement refers to the Middle Eocene tectonic transition from the early to the late Wenchang Rifting stage(about 43 Ma ago) in the Pearl River Mouth Basin. Based on seismic reflection, drilling, logging and geological data, fault characteristic analysis, denudation thickness recovery, magmatism statistics, regional tectonic dynamics comparison and other methods are used to reveal the characteristics, properties and dynamic mechanism of the Huizhou Movement. The Huizhou Movement mainly shows the North-South transition of rifting and the migration along the faults, basement uplift, magmatic diapir and stratigraphic denudation. It is believed that the Huizhou Movement is a comprehensive reflection of plate interaction and lithospheric thinning process in the Pearl River Mouth Basin, which is closely related to the transition of lithosphere from initial rifting to rapid thinning, the India-Eurasia hard collision and the change of subduction direction of the Pacific plate. The Huizhou Movement has significant influence and control on the Paleogene hydrocarbon-generating sags and the development of hydrocarbon source rocks, sedimentary system and deep high-quality reservoir, hydrocarbon migration and accumulation in the Pearl River Mouth Basin.

关键词： Huizhou Movement hydrocarbon accumulation Eocene Paleocene Pearl River Mouth Basin

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Direct ink writing of multifunctional gratings with gel-like MXene/norepinephrine ink for dynamic electromagnetic interference shielding and patterned Joule heating

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Nano Research 2024年第3期17卷 1585-1594页

作者： Pei-Zhu Jiang Zhiming deng peng Min Lvxuan Ye Cheng-Zhang Qi Hao-Yu Zhao Ji Liu Hao-Bin Zhang Zhong-Zhen Yu Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029China State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China School of Chemistry CRANN and AMBERTrinity College DublinDublin D02PN40Ireland

Intelligent electromagnetic interference(EMI)shielding modulators with a wide tuning range and cyclic stability are urgently needed but their fabrication remains challenging.A gel-like MXene/norepinephrine ink is developed and multifunctional MXene gratings with wide EMI shielding effectiveness(SE)tuning range,superior reversibility,and high mechanical flexibility are constructed by direct ink writing approach for dynamic EMI shielding and patterned Joule heating *** modulable MXene/norepinephrine grating with a high conductivity of 3510 S·cm-1 can conveniently realize the seamless modulation of the EMI SE by adjusting the angle between the MXene grating filaments and the electric field of the incident electromagnetic waves,offering highly reversible switching between shielding“On”(28.0 dB)and“Off”(0.5 dB)***,due to the optimized integration of the MXene ink and the rationally designed pattern,a superior specific EMI SE of 95,688.2 dB·cm^(2)·g^(-1) is achieved in the“On”***,the MXene/norepinephrine ink can be used to fabricate many complex patterned gratings with superior stability,instant responsibility,and superb mechanical flexibility,exhibiting a unique patterned Joule heating *** writing of multifunctional gratings paves a means for developing intelligent EMI shielding materials,wearable electronic devices,and advanced thermal management materials.

关键词： MXene ink direct ink writing electromagnetic interference shielding multifunctional gratings Joule heating

雷暴风作用下大跨度桥梁抖振响应智能预测研究

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中国公路学报 2023年第8期36卷 87-95页

作者：陶天友邓鹏王浩石棚东南大学混凝土及预应力混凝土结构教育部重点实验室江苏南京211189 东南大学土木工程学院江苏南京211189

面向特异风环境桥梁风振实时推演,开展了雷暴风作用下大跨度桥梁抖振响应智能预测研究。以苏通大桥实测数据为基础,分析了风场参数与主梁抖振响应之间的相关性,确定了桥梁雷暴风效应的主要关联参数。基于前馈神经网络(FNN)、卷积神经网... 详细信息

面向特异风环境桥梁风振实时推演,开展了雷暴风作用下大跨度桥梁抖振响应智能预测研究。以苏通大桥实测数据为基础,分析了风场参数与主梁抖振响应之间的相关性,确定了桥梁雷暴风效应的主要关联参数。基于前馈神经网络(FNN)、卷积神经网络(CNN)、长短期记忆网络(LSTM)、门控循环单元(GRU)等典型神经网络模型,以主要风场关联参数及历史抖振响应作为输入,开展了桥梁抖振响应预测网络架构与模型训练,并对比分析了4种模型的预测效果。研究结果表明:雷暴风作用下大跨度桥梁的抖振响应主要与平均风速、平均风向、脉动风速均方差、紊流积分尺度等风场参数密切相关;待预测的桥梁抖振响应与历史风场及桥梁状态参数有关,需考虑二者的记忆效应;FNN与CNN未能较好地表征该记忆效应,故预测结果与实测值仅趋势相近,预测误差相对较大;GRU与LSTM的预测效果总体较好,GRU在雷暴风风速较大时的预测效果最优;LSTM在高风速下的预测效果略低于GRU,但在风速较低时的抖振预测精度最高,即具有更强的泛化能力。研究结果可为雷暴风易发区大跨度桥梁的安全运维提供借鉴与参考。

关键词：桥梁工程抖振响应深度学习雷暴风大跨度桥梁响应预测

HHO optimized support vector machine classifier for traditional Chinese medicine syndrome differentiation of diabetic retinopathy

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International Journal of Ophthalmology(English edition) 2024年第6期17卷 991-1000页

作者： Li Xiao Cheng-Wu Wang Ying deng Yi-Jing Yang Jing Lu Jun-Feng Yan Qing-Hua peng School of Chinese Medicine Hunan University of Chinese MedicineChangsha 410208Hunan ProvinceChina School of Informatics Hunan University of Chinese MedicineChangsha 410208Hunan ProvinceChina Hunan Provincial Key Laboratory for Prevention and Treatment of Ophthalmology and Otolaryngology Diseases with Chinese Medicine Hunan University of Chinese MedicineChangsha 410208Hunan ProvinceChina Hunan Provincial Engineering and Technological Research Center for Prevention and Treatment of Ophthalmology and Otolaryngology Diseases with Chinese Medicine and Protecting Visual Function Hunan University of Chinese MedicineChangsha 410208Hunan ProvinceChina

AIM:To develop a classifier for traditional Chinese medicine(TCM)syndrome differentiation of diabetic retinopathy(DR),using optimized machine learning algorithms,which can provide the basis for TCM objective and intelligent syndrome ***:Collated data on real-world DR cases were collected.A variety of machine learning methods were used to construct TCM syndrome classification model,and the best performance was selected as the basic *** Algorithm(GA)was used for feature selection to obtain the optimal feature *** Hawk Optimization(HHO)was used for parameter optimization,and a classification model based on feature selection and parameter optimization was *** performance of the model was compared with other optimization *** models were evaluated with accuracy,precision,recall,and F1 score as ***:Data on 970 cases that met screening requirements were *** Vector Machine(SVM)was the best basic classification *** accuracy rate of the model was 82.05%,the precision rate was 82.34%,the recall rate was 81.81%,and the F1 value was 81.76%.After GA screening,the optimal feature combination contained 37 feature values,which was consistent with TCM clinical *** model based on optimal combination and SVM(GA_SVM)had an accuracy improvement of 1.92%compared to the basic *** model based on HHO and GA optimization(HHO_GA_SVM)had the best performance and convergence speed compared with other optimization *** with the basic classification model,the accuracy was improved by 3.51%.CONCLUSION:HHO and GA optimization can improve the model performance of SVM in TCM syndrome differentiation of *** provides a new method and research idea for TCM intelligent assisted syndrome differentiation.

关键词： traditional Chinese medicine diabetic retinopathy Harris Hawk Optimization Support Vector Machine syndrome differentiation

酶法破壁提取蜂花粉功能成分的工艺优化及抗氧化活性分析

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食品安全质量检测学报 2024年第9期15卷 278-286页

作者：任志斌邓鹏尹雷吴杰曲军霞陈洁徐宏楠何志勇曾茂茂烟台新时代健康产业有限公司烟台264006 江南大学食品学院无锡214122

目的探索酶解结合超声和碱解从而高效破壁和提取蜂花粉中的活性成分。方法采用扫描电镜对蜂花粉微观结构进行分析,并使用高效液相色谱法分析酚类物质的组成和含量变化。结果经12.5%碱性蛋白酶酶解1 h后,蜂花粉酶解上清液的总酚含量、总... 详细信息

目的探索酶解结合超声和碱解从而高效破壁和提取蜂花粉中的活性成分。方法采用扫描电镜对蜂花粉微观结构进行分析,并使用高效液相色谱法分析酚类物质的组成和含量变化。结果经12.5%碱性蛋白酶酶解1 h后,蜂花粉酶解上清液的总酚含量、总黄酮含量和2,2’-联氮-二(3-乙基-苯并噻唑啉-6-磺酸)二铵盐[2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)ammonium salt,ABTS]阳离子自由基清除能力最高,分别为(14.14±0.23)mg GAE/(g·dw),(2.34±0.04)mg RE/(g·dw)和(167.06±1.39)μmol TE/(g·dw)。将酶解辅以超声协同0.3 mol/L NaOH处理后,总酚、总黄酮、ABTS阳离子自由基清除能力及铁离子还原能力相比未处理花粉分别提高了191%、39%、69%和162%。扫描电镜结果显示,碱处理酶解后花粉细胞壁破碎程度显著增加,花粉内含物质从裂口处向外溢出,与理化指标趋势一致。最佳工艺条件为0.3mol/LNaOH超声-碱处理1h,调节pH至7,12.5%的碱性蛋白酶于50℃下酶解1 h。结论超声碱处理可辅助酶解实现蜂花粉的高效破壁,同时小肽、多酚、黄酮等营养成分也进一步溶出,促进了蜂花粉的高值化利用。

关键词：蜂花粉破壁酶解碱处理酚类物质

Spontaneous anchoring Cl into α-Co（OH）2 as efficient and stable oxygen reduction electrocatalysts for seawater battery

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Rare Metals 2024年第7期43卷 3074-3083页

作者： Wang Zheng Xue-Rong Zheng Qi Lu Yan-Hui Cao Yang Wang Hai-peng Fu Jin-Feng Zhang Yi-Da deng Wen-Bin Hu School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin University State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan University Key Laboratory of Electromagnetic Processing of Materials Ministry of EducationNortheastern University

Seawater battery is an advanced energy storage system that enables conversion of chemical energy to electricity by consuming metals,dissolved oxygen and seawater in anode,cathode and electrolyte,***,the oxygen reduction reaction（ORR） activity and stability of electrocatalysts can be easily deactivated due to the severe Cl-permeation and corrosion in seawater ***,we developed a structural buffer engineering strategy by spontaneously anchoring Cl-into α-Co（OH）2as efficient and stable ORR electrocatalysts,in which the ultrathin α-Co（OH）2nanosheets were synthesized using an ultrafast solution high-temperature shock（SHTS） *** large lattice space（～ 0.8 nm） of layered α-Co（OH）2ensured the spontaneously penetration of Cl-into the lattice structure and replaced part of OH-to form α-Co（OH）*** continuous leaching and compensating of saturated Cl in α-Co（OH）2-xClxcould enhance the Cl-corrosion resistance and modulate electronic structure of Co metallic sites,thus improving the ORR electrocatalytic activity and stability in seawater *** α-Co（OH）2-xClxseawater batteries display superior onset and half-wave potentials of 0.71 and 0.66 V,respectively,which are much better than the counterparts of α-Co（OH）2and of β-Co（OH）2with no Cl-penetrating and no buffer *** α-Co（OH）2-xClx-based seawater batteries display stable open-circuit potential of 1.69 V and outstanding specific capacity of 1345 mAh·g-1.

关键词： Seawater battery Oxygen reduction electrocatalyst Solution high-temperature shock Structural buffer engineering

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复杂环境下机器人多传感器融合定位方法

电子测量与仪器学报 2023年第12期37卷 48-57页

作者：邓鹏罗静荆楚理工学院电子信息工程学院荆门448000

为了解决在斜坡、特征退化以及GNSS信号丢失等复杂环境下连续精确的定位问题,提出了基于地面约束的多传感器融合方案,用于提高SLAM算法的整体性能。首先提出了不同系统状态下的关键帧选取策略。通过在起始位置增加关键帧的数量,避免了... 详细信息

为了解决在斜坡、特征退化以及GNSS信号丢失等复杂环境下连续精确的定位问题,提出了基于地面约束的多传感器融合方案,用于提高SLAM算法的整体性能。首先提出了不同系统状态下的关键帧选取策略。通过在起始位置增加关键帧的数量,避免了因子图优化后产生的定位跳变,从而得到连续准确的位姿输出。同时,针对误差累积所导致回环检测失效,利用该关键帧策略,有效地增大当前帧的子关键帧集合,提高了回环检测算法的鲁棒性。其次,针对IMU在长时间运行后高度方向上漂移过大的问题,本文根据提取的地面点构建地面约束,并引入因子图中进行优化。最后,利用搭建的移动机器人实验平台,完成了校园不同场景的数据采集,验证本文算法的有效性,并在KITTI数据集与LIO-SAM算法进行了对比测试,通过误差分析表明本文算法具有更优的定位精度。

关键词：多传感器融合复杂环境地面点云提取关键帧选取策略

The Modification on the Discreteness of Park-Ang Damage Index Based on Bayesian Methodology

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Journal of Harbin Institute of Technology(New Series) 2014年第1期21卷 102-108页

作者： Yi-Bin He peng deng Chao Zhang Pu-Sheng Shen College of Civil Engineering Hunan University

The discreteness is a common deficiency which impedes damage indices' practical application. It is caused by the arbitrary linear combination and some missing necessary variables. In order to deal with this problem,the correction term was added to the widely cited Park-Ang damage index. The unknown parameters in the correction term were obtained by the maximum likelihood estimation of these parameters' posterior distributions updated through Bayesian methodology. And the specimens for Bayesian updating were selected from PEER column database and Kawashima Earthquake Engineering Laboratory. Through model simplification process,a simplified modification was adopted,which has improved its goodness of fit to the experimental data. It has been found that the concrete core area and cross sectional area ratio,the longitudinal reinforcement ratio and the damage concentration factor are the critical variables affecting the error of the original damage index.

关键词： bayesian methodology damage index reinforced concrete seismic behavior

Abrasive Wear Behavior and Mechanism of High Chromium Cast Iron

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Journal of Iron and Steel Research(International) 2015年第1期22卷 84-90页

作者： Ting SUN Ren-bo SONG Xu WANG peng deng Chun-jing WU School of Materials Science and Engineering University of Science and Technology Beijing

The abrasive wear behavior of high chromium cast iron （containing 12.9 mass% chromium） austenitized at 1 050 ℃ for 2 h and austempered in salt bath at 320 ℃ for 4 h was evaluated. Abrasive wear was performed using alumina abrasive under four different loads, namely 50, 100, 150, and 200 N, for 36000 cycles. The worn surfaces and wear debris were analyzed by scanning electron microscopy, laser confocal microscopy and X-ray diffraction. Micro hard- ness profiles were also obtained in order to analyze the strain-hardening effects beneath the contact surfaces. Results indicate that the retained austenite in high chromium cast iron has experienced induced martensitic transformation af- ter tests, for small amounts of retained austenite could be detected by X-ray diffraction. In addition, there is a close relationship between wear mechanism and test load. Under the condition of lower test load, the wear mechanism is an uninterrupted and repeated process, during which matrix is cut at first and then fine carbides flake off. As to high- er test load, scratching and spalling induced by cleavage fracture of blocky carbide are the wear mechanism.

关键词： high chromium cast iron abrasive wear wear mechanism wear behavior martensitic transformation