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深度分层融合超像素分割的深度视频去噪算法

青岛大学学报（工程技术版） 2020年第1期35卷 11-15页

作者：韩丰泽董文帅张维忠青岛大学计算机科学技术学院山东青岛266071 青岛大学附属医院急诊科山东青岛266071

针对传统的视频去噪方法对深度视频去噪效果不理想,导致丢失轮廓信息和深度值信息的问题,本文提出一种新的深度视频分层去噪与彩色图像超像素分割相结合的深度视频去噪算法。首先获取深度视频的深度信息,根据深度值分布,将深度视频帧分... 详细信息

针对传统的视频去噪方法对深度视频去噪效果不理想,导致丢失轮廓信息和深度值信息的问题,本文提出一种新的深度视频分层去噪与彩色图像超像素分割相结合的深度视频去噪算法。首先获取深度视频的深度信息,根据深度值分布,将深度视频帧分层去噪,然后将去噪后的每一深度层合并为深度帧,将与深度帧相对应的彩色帧进行超像素划分,填补去除噪声后产生的深度值空白区域的深度值,去除深度视频噪声,或根据物体周边深度值,消除并填补由物体遮挡产生的干扰噪声。实验结果表明,该算法能够消除深度视频噪声,有效解决了深度视频噪声导致画面凌乱,目标物体辨识难,无关物体遮蔽深度信息,获取深度信息困难等问题,减少噪声对公共客流统计项目的干扰,具有较好的实时性和鲁棒性。该研究在公共交通客流统计项目以及医院急诊患者数量统计项目上进行了验证,具有一定的实际应用价值。

关键词：深度视频去噪分层去噪超像素划分深度值填充客流统计

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远程卒中医疗的研究进展和应用现状

国际脑血管病杂志 2015年第2期23卷 111-115页

作者：金巍时芳芳董文帅陈静任传成顾勇复旦大学附属上海第五人民医院神经内科上海200240 复旦大学附属上海第五人民医院肾内科上海200240

尽管循证医学证据表明，重组组织型纤溶酶原激活剂能有效开通闭塞血管，但由于其治疗时间窗短和存在出血风险，目前的溶栓率普遍较低。临床研究表明，远程卒中医疗能有效缩短患者就诊时间、提高溶栓率、降低出血风险和改善患者转归。尽... 详细信息

尽管循证医学证据表明，重组组织型纤溶酶原激活剂能有效开通闭塞血管，但由于其治疗时间窗短和存在出血风险，目前的溶栓率普遍较低。临床研究表明，远程卒中医疗能有效缩短患者就诊时间、提高溶栓率、降低出血风险和改善患者转归。尽管目前远程卒中医疗的应用受到技术、政策和资金等多方面的限制，但随着相关技术的日趋成熟，远程卒中医疗将会在卒中治疗中发挥越来越重要的作用。

关键词：卒中脑缺血远程医学血栓溶解疗法时间因素

一种基于智能移动终端的家庭成员安全监护系统设计与实现

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测绘工程 2018年第12期27卷 44-50页

作者：符晨曦程钢董文帅岳俊升张清兰河南理工大学测绘与国土信息工程学院河南焦作454000 矿山空间信息技术国家测绘地理信息局重点实验室河南焦作454000

为了增强儿童、老年人等群体独自出行的安全性,设计一种基于智能移动终端的家庭成员安全监护系统。该系统结合了移动互联网、智能终端操作系统、GNSS定位、地理围栏等技术,实现对被监护者的实时定位和测速,并根据被监护者是否超速、是... 详细信息

为了增强儿童、老年人等群体独自出行的安全性,设计一种基于智能移动终端的家庭成员安全监护系统。该系统结合了移动互联网、智能终端操作系统、GNSS定位、地理围栏等技术,实现对被监护者的实时定位和测速,并根据被监护者是否超速、是否摔倒和是否超出虚拟围栏范围等,对监护者的安全状态进行判断并自动发出预警。系统以SuperMap为空间分析和服务平台,进行基于Android的移动智能系统开发。经测试,系统功能完善,性能稳定,有助于提高被监护人员的人身安全,有良好的应用价值和应用前景。

关键词：安全监护智能移动终端 Android开发地理围栏

An eikonal equation-based earthquake location method by inversion of multiple phase arrivals

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Science China Earth Sciences 2024年第6期67卷 1802-1817页

作者： Gaoyue LAO Dinghui YANG Shaolin LIU Guiju dong wenshuai WANG Kui LIU National Institute of Natural Hazards Ministry of Emergency Management of ChinaBeijing 100085China School of Earth Sciences Yunnan UniversityKunming 650091China Department of Mathematical Sciences Tsinghua UniversityBeijing 100084China School of Mathematics and Statistics Ningxia UniversityYinchuan 750021China

The precise determination of earthquake location is the fundamental basis in seismological community,and is crucial for analyzing seismic activity and performing seismic *** arrivals are generally used to practically determine earthquake ***,first-arrival traveltimes are not sensitive to focal ***,they cannot accurately constrain focal *** improve the accuracy,researchers have analyzed the depth phases of earthquake *** traveltimes of depth phases are sensitive to focal depths,and the joint inversion of depth phases and direct phases can be implemented to potentially obtain accurate earthquake ***,researchers can determine earthquake locations in layered *** layered models can only represent the first-order feature of subsurface structures,the advantages of joint inversion are not fully explored if layered models are *** resolve the issue of current joint inversions,we use the traveltimes of three seismic phases to determine earthquake locations in heterogeneous *** three seismic phases used in this study are the first P-,sPg-and *** calculate the traveltimes of the three seismic phases by solving an eikonal equation with an upwind difference scheme and use the traveltimes to determine earthquake *** verify the accuracy of the earthquake location method by the inversion of three seismic phases,we take the 2021 M_(S)6.4 Yangbi,Yunnan earthquake as an example and locate this earthquake using synthetic and real seismic *** tests demonstrate that the eikonal equation-based earthquake location method,which involves the inversion of multiple phase arrivals,can effectively improve earthquake location accuracy.

关键词： Earthquake location Eikonal equation Fast marching method Heterogeneous model

Catalytic oxidative desulfurization of fuels in acidic deep eutectic solvents with [(C_6H_(13))_3P(C_(14)H_(29))]_3PMo_(12)O_(40) as a catalyst

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Petroleum Science 2018年第4期15卷 841-848页

作者： Wei Jiang Hao Jia Zhanglong Zheng Linhua Zhu Lei dong Wei Liu wenshuai Zhu Huaming Li Institute for Energy Research Jiangsu University School of Chemistry and Chemical Engineering Jiangsu University Key Laboratory of Tropical Medicinal Plant Chemistry of Education Hainan Normal University

Deep eutectic solvents(DESs) are a new class of green solvents analogous to ionic liquids due to their biodegradable capacity and low cost. However, the direct extractive desulfurization of diesel oil by DESs cannot meet the government’s standard. In this work, amphiphilic polyoxometalates were synthesized and characterized by FT-IR and mass *** oxidative desulfurization results showed that benzothiophene(BT) could be completely removed by employing a [(CH)P(CH)]PMoO, DES(ChCl/2 Ac) and HOsystem. It was also found that the organic cation of catalysts played a positive role in oxidative desulfurization. The reaction conditions, such as reaction temperature and time, the amount of catalyst and DES and HO/S(O/S) molar ratio, were optimized. Different sulfides were tested to determine the desulfurization selectivity of the optimal reaction system, and it was found that 97.2% of dibenzothiophene(DBT) could be removed followed by 80.7% of 4-MDBT and 76.0% of 4,6-DMDBT. After reaction, the IR spectra showed that the catalyst [(CH)P(CH)]PMoOwas stable during the reaction process and the oxidative product was dibenzothiophene sulfone(DBTO). Furthermore, the catalyst can be regenerated and recycled for four runs with little loss of activity.

关键词： Diesel Oxidative desulfurization Deep eutectic solvents Polyoxometalates H_2O_2

Strategies for Improving the Brightness of Aggregation-Induced Emission Materials at Aggregate Level

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Chinese Journal of Chemistry 2023年第10期41卷 1249-1259页

作者： Yixiong Gui Keyao Chen Yan Sun Yonghong Tan wenshuai Luo dongxia Zhu Yu Xiong Dingyuan Yan dong Wang Ben Zhong Tang Center for AIE Research College of Materials Science and EngineeringShenzhen UniversityShenzhenGuangdong 518060China School of Science and Engineering Shenzhen Institute of Molecular Aggregate Science and EngineeringThe Chinese University of Hong KongShenzhenGuangdong 518172China Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province Department of ChemistryNortheast Normal UniversityChangchunJilin 130024China

The brightness of fluorescent agents directly determines the imaging performance as *** various fluorophores,small organic species are promising given its exact purity/composition and excellent ***,chromophores with planar geometry may suffer from the undesirable aggregation-caused quenching(ACQ)***,luminogens showing aggregation-induced emission(AIE)features are preferable as the aggregates which are the most common used *** this review,we mainly focus on the strategies employed for boosting the brightness of AIE-active luminogens(AIEgens).From molecule to mor-phology levels,approaches that regulate electronic transition processes of the molecule or the packing extent of aggregates in order to confine molecular motion,reduceπ-πstacking,disrupt fluorophore-water interactions,etc.,are *** the end,the current challenges and perspectives are briefly *** anticipate that this review will stimulate new insights and more efforts for the advancement of ultrabright AIEgens.

关键词： Aggregation-induced emission Fluorescence brightness Restriction of molecular motion Radiative energy decay Electron transfer π-πstacking

Titanium alloy composited with dual-cytokine releasing polysaccharide hydrogel to enhance osseointegration via osteogenic and macrophage polarization signaling pathways

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Regenerative Biomaterials 2022年第1期9卷 372-388页

作者： Yaping Wang Zujian Feng Xiang Liu Chunfang Yang Rui Gao wenshuai Liu Wenbin Ou-Yang Anjie dong Chuangnian Zhang Pingsheng Huang Weiwei Wang Department of Polymer Science and Engineering Key Laboratory of Systems Bioengineering(Ministry of Education)School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Key Laboratory of Innovative Cardiovascular Devices Chinese Academy of Medical SciencesBeijing 100037China Tianjin Key Laboratory of Biomaterial Research Institute of Biomedical EngineeringChinese Academy of Medical Sciences and Peking Union Medical CollegeTianjin 300192China Structural Heart Disease Center National Center for Cardiovascular DiseaseChina and Fuwai HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100037China

Titanium alloy has been widely used in orthopedic surgeries as bone defect ***,the regeneration of high-quality new bones is limited due to the pro-inflammatory microenvironment around implants,resulting in a high occurrence rate of implant loosening or failure in osteological *** this study,extracellular matrix-mimetic polysaccharide hydrogel co-delivering BMP-2 and interleukin(IL)-4 was composited with 3D printed titanium alloy to promote the osseointegration and regulate macrophage response to create a pro-healing microenvironment in bone ***,it is discovered from the bioinformatics data that IL-4 and BMP-2 could affect each other through multiple signal pathways to achieve a synergistic effect toward *** composite scaffold significantly promoted the osteoblast differentiation and proliferation of human bone marrow mesenchyme stem cells(hBMSCs).The repair of large-scale femur defect in rat indicated that the dual-cytokinedelivered composite scaffold could manipulate a lower inflammatory level in situ by polarizing macrophages to M2 phenotype,resulting in superior efficacy of mature new bone regeneration over the treatment of native titanium alloy or that with an individual ***,this work highlights the importance of M2-type macrophages-enriched immune-environment in bone *** biomimetic hydrogel–metal implant composite is a versatile and advanced scaffold for accelerating in vivo bone regeneration,holding great promise in treating orthopedic diseases.

关键词： hydrogel composite scaffold bone regeneration cytokine delivery macrophage polarization

Magnetic covalent organic framework nanospheres-based miRNA biosensor for sensitive glioma detection

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Bioactive Materials 2022年第8期7卷 145-151页

作者： dong Liang Xiaoyi Zhang Yi Wang Taotao Huo Min Qian Yibo Xie wenshuai Li Yunqiu Yu Wei Shi Qianqian Liu Junle Zhu Chun Luo Zhijuan Cao Rongqin Huang School of Pharmacy Key Laboratory of Smart Drug DeliveryMinistry of EducationFudan UniversityShanghai201203China Center for Advanced Low-dimension Materials State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of ChemistryChemical Engineering and BiotechnologyDonghua UniversityShanghai201600China Department of Neurosurgery Affiliated Hospital of Nantong UniversityNantong226001China Department of Neurosurgery Tongji HospitalTongji University School of MedicineShanghai200065China

Sensitive detection and accurate diagnosis/prognosis of glioma remain urgent ***,dispersed magnetic covalent organic framework nanospheres(MCOF)with uniformed Fe3O4 nano-assembly as cores and high-crystalline COF as shells were prepared by monomer-mediated in-situ interface growth *** on the unique interaction between MCOF and hairpin DNA,a fluorescent signal amplified miRNA biosensor was *** could realize the sensitive detection of miRNA-182 in different matrixes,where the detection limit,linearity range and determination coefficient(R^(2))in real blood samples reached 20 fM,0.1 pM-10 pM and 0.991,***,it possessed good stability and precision as observed from the low intra-day/inter-day RSD and high extraction *** a result,it could quantify miRNA-182 in serum of glioma patients,the concentration of which was significantly higher than that of healthy people and obviously decreased after ***,a proof-of-concept capillary chip system using this biosensor was proposed to realize the visualized detection of miRNA-182 in *** findings suggest a robust way for sensitive detection and accurate diagnosis/prognosis of glioma.

关键词： Blood samples Fluorescence signal amplification biosensor Glioma diagnosis Magnetic COF nanospheres miRNA detection

Spectral Clustering with Eigenvalue Similarity Metric Method for POL-SAR Image Segmentation of Land Cover

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Journal of Geographic Information System 2018年第1期10卷 150-164页

作者： Shuiping Gou Debo Li dong Hai wenshuai Chen Fangfang Du Licheng Jiao Xidian University Xi’an China

A simple and fast approach based on eigenvalue similarity metric for Polarimetric SAR image segmentation of Land Cover is proposed in this paper. The approach uses eigenvalues of the coherency matrix as to construct similarity metric of clustering algorithm to segment SAR image. The Mahalanobis distance is used to metric pairwise similarity between pixels to avoid the manual scale parameter tuning in previous spectral clustering method. Furthermore, the spatial coherence constraints and spectral clustering ensemble are employed to stabilize and improve the segmentation performance. All experiments are carried out on three sets of Polarimetric SAR data. The experimental results show that the proposed method is superior to other comparison methods.

关键词： Polarimetric Synthetic Aperture Radar Eigenvalue Mahalanobis Distance Spectral Clustering Image Segmentation