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Lumbar spine localisation method based on feature fusion

CAAI Transactions on Intelligence Technology 2023年第3期8卷 931-945页

作者： Yonghong Zhang Ning hu Zhuofu Li Xuquan Ji Shanshan Liu Youyang Sha Xiongkang Song Jian Zhang Lei hu Weishi Li Robotics Institute School of Mechanical Engineering and AutomationBeihang UniversityBeijingChina Beijing Zhuzheng Robot Co. LTDBeijingChina Department of Mechanical Aerospace and Biomedical EngineeringUniversity of TennesseeKnoxvilleTennesseeUSA Department of Orthopaedics Peking University Third HospitalBeijingChina Engineering Research Center of Bone and Joint Precision Medicine Ministry of EducationBeijingChina Beijing Key Laboratory of Spinal Disease Research BeijingChina School of Biological Science and Medical Engineering Beihang UniversityBeijingChina Department of Computer Science University of WarwickCoventryUK

To eliminate unnecessary background information,such as soft tissues in original CT images and the adverse impact of the similarity of adjacent spines on lumbar image segmentation and surgical path planning,a two‐stage approach for localising lumbar segments is ***,based on the multi‐scale feature fusion technology,a non‐linear regression method is used to achieve accurate localisation of the overall spatial region of the lumbar spine,effectively eliminating useless background information,such as soft *** the second stage,we directly realised the precise positioning of each segment in the lumbar spine space region based on the non‐linear regression method,thus effectively eliminating the interference caused by the adjacent *** 3D Intersection over Union(3D_IOU)is used as the main evaluation indicator for the positioning *** an open dataset,3D_IOU values of 0.8339�0.0990 and 0.8559�0.0332 in the first and second stages,respectively is *** addition,the average time required for the proposed method in the two stages is 0.3274 and 0.2105 s ***,the proposed method performs very well in terms of both pre-cision and speed and can effectively improve the accuracy of lumbar image segmentation and the effect of surgical path planning.

关键词： CT image lumbar spatial orientation multi‐scale information fusion

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Ternary core-shell structured transition metal chalcogenide for hybrid electrochemical capacitor

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Chinese Chemical Letters 2018年第12期29卷 1799-1803页

作者： Hengqi Liu Depeng Zhao Pengfei hu Xiang Wu School of Materials Science and Engineering Shenyang University of Technology

Hybrid structured semiconductor nanomaterials possess excellent electrochemical performances owing to the synergistic effects from two components. Herein we report a novel CoMo;S;@Zn-Co-S core-shell structure as the electrode materials for asymmetric supercapacitor. The unique electrode structure is beneficial to rapid electron transport and the ion diffusion due to the existence of many vast *** as-synthesized core-shell structured electrode exhibits an overall improved electrochemical performance. Moreover, a quasi-solid state asymmetric supercapacitor is fabricated. It reveals a specific capacitance of 0.84 C/cm;collected at 4mA/cm;and an energy density of 1.87 mWh/cm;at a power density of 31.99 W/cm;.

关键词： CoMo_2S_4@Zn-Co-S Core-shell structure Supercapacitor Specific capacitance High energy density

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Hierarchical Non-linear Image Registration Integrating Deformable Segmentation

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Journal of Shanghai Jiaotong university(Science) 2005年第4期10卷 327-332页

作者： RAN Xin（冉鑫） QI Fei-hu（戚飞虎） Dept. of Computer Science ＆ Eng. Shanghai Jiaotong Univ. Shanghai 200030 China

A hierarchical non-linear method for image registration was presented, which integrates image segmentation and registration under a variational framework. An improved deformable model is used to simultaneously segment and register feature from multiple images. The objects in the image pair are segmented by evolving a single contour and meanwhile the parameters of affine registration transformation are found out. After that, a contour-constrained elastic registration is applied to register the images correctly. The experimental results indicate that the proposed approach is effective to segment and register medical images.

关键词： image segmentation image registration deformable model

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基于传递函数的IGBT模块结温估计及老化监测方法

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天津理工大学学报 2025年第1期41卷 36-43页

作者：孙谢鹏杜明星胡经纬天津理工大学复杂系统控制理论及应用天津市重点实验室天津理工大学电气工程与自动化学院

绝缘栅双极型晶体管(insulated gate bipolar transistor, IGBT)模块的Cauer模型与可靠性密切相关，因此研究Cauer模型及其参数的提取方法具有重要的实际意义。基于此，以三阶Cauer模型为例，研究了基于底板温度传递函数的热网络模型参... 详细信息

绝缘栅双极型晶体管(insulated gate bipolar transistor, IGBT)模块的Cauer模型与可靠性密切相关，因此研究Cauer模型及其参数的提取方法具有重要的实际意义。基于此，以三阶Cauer模型为例，研究了基于底板温度传递函数的热网络模型参数提取方法，并利用该模型实现了结温准确估计和老化状态监测。首先，建立了底板温度传递函数与热网络模型参数的关系，确定了三阶Cauer频域模型的热阻和热容。其次，根据得到的三阶Cauer频域模型反推出结温传递函数，进而求得结温表达式，实现IGBT模块结温估计并实验验证其准确性。最后，将该方法与国际电工委员会(international electrotechnical commission, IEC)标准下的总热阻计算方法相比，计算误差小于1%,且实现了结温的准确估计。此外，基于此方法可以实现对IGBT模块、热界面材料(thermal interface material, TIM)和散热片散热效果的状态监测。

关键词：绝缘栅双极型晶体管 Cauer频域模型传递函数结温估计状态监测

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A mild and efficient method for nucleophilic aromatic fluorination using tetrabutylammonium fluoride as fluorinating reagent

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Chinese Chemical Letters 2010年第2期21卷 151-154页

作者： hu, Yu Feng Luo, Jun Lue, Chun Xu Nanjing Univ Sci & Technol Sch Chem Engn Nanjing 210094 Peoples R China

Anhydrous tetrabutylammonium fluoride(TBAF_(anh).) has been found to be a highly efficient fluorinating reagent for nucleophilic aromatic fluorinations such as fluorodenitration or halogen exchange(Halex) *** products were formed in high to excellent yields under surprisingly mild reaction conditions and no phenol or ether side-products were detected in these reactions.

关键词： TBAF_(anh). Fluoroaromatics Fluorodenitration Halex

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Genome-wide mapping of QTL associated with heterosis in the RIL-based NCIII design

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Chinese Science Bulletin 2012年第21期57卷 2655-2665页

作者： HE XiaoHong hu ZhongLi ZHANG Yuan-Ming Section on Statistical Genomics State Key Laboratory of Crop Genetics and Germplasm Enhancement&Chinese National Center for Soybean ImprovementCollege of AgricultnreNanjing Agricultural UniversityNanjing 210095China State Key Laboratory of Hybrid Rice College of Life SciencesWuhan UniversityWuhan 430072China

Heterosis represents one of the most revolutionary advancements in crop *** the genetic dissection of heterosis,NCIII design is one of the most powerful and widely used mating ***,the methodologies for quantitative trait loci (QTL) detection in the design were mostly based on composite interval ***,in this study,our purpose was to develop a statistical method for mapping epistatic QTL associated with heterosis in the RIL-based NCIII ***,we derivated the expectations of two classical linear transformations,Z 1 and Z 2,while a quantitative trait was controlled by two QTL with digenic epistasis and arbitrary linkage under the F ∞ and F 2 metric ***,we constructed an epistatic genetic model that includes all markers on the whole genome simultaneously,and estimated all the parameters in the model by the empirical Bayes ***,a series of Monte Carlo simulation experiments was carried out to confirm the proposed *** results show that:(1) all the augmented genetic parameters for main-effect QTL could be rightly identified with satisfactory statistical power and precision;(2) the statistical powers in the detection of augmented epistatic effects were substantively affected by the signs of pure epistatic effects;(3) it is more difficult to detect epistatic QTL than to detect main-effect QTL;(4) statistical power is higher in the RIL-based NCIII design than in the F 2-based NCIII design,especially in the detection of the augmented epistatic effect that consists of two pure epistatic effects in opposite directions.

关键词：数量性状位点全基因组杂种优势设计测绘上位性效应统计方法复合区间作图

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Light-responsive nanocomposites combining graphene oxide with POSS based on host-guest chemistry

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Chinese Chemical Letters 2019年第3期30卷 717-720页

作者： Zhiwei Teng Bingtao Wang Yingying hu Danqian Xu State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology Zhejiang University of Technology Institute of Packaging Engineering Ningbo Institute of Technology Zhejiang University

Based on the reversible host-guest inclusion/exclusion of cyclodextrin-functionalized graphene oxide(GO-CD) and azobenzene-terminated polyhedral oligomeric silsesquioxane(Azo-POSS), a novel kind of light-responsive nanocomposites GO-POSS was developed under mild condition. ~1H NMR, ET-IR,TG, TEM and UV-vis spectroscopy were conducted to characterize the chemical composition and photoresponsive performance of obtained GO-POSS nanocomposites. The results demonstrated that nanocagestructured POSS and nanosheet GO components in GO-POSS exhibited pronounced supra molecular assembly/disassembly behavior upon UV/vis irradiation. Moreover, GO-POSS nanocomposites showed good water dispersity and had remarkable impact on oxygen permeability of conventional PVA-coated films under varied light irradiation conditions, which would be valuable for developing smart gas barrier materials in packaging.

关键词： Graphene oxide POSS Light-responsiveness Host-guest inclusion Oxygen permeability

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A new approach of proration-injection allocation for water-flooding mature oilfields

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Petroleum 2015年第1期1卷 27-30页

作者： Shuyong hu Yongkai Li Ziwei Wang Guoqiang hu State Key Laboratory of Oil&Gas Reservoir Geology Exploitation Engineering Southwest Petroleum UniversityChengduSichuanPeople's Republic of China

This paper presents a new method of injection-production allocation estimation for water-flooding mature *** suggested approach is based on logistic growth rate functions and several type-curve matching *** the relationship between these equations,oil production and water injection rate as well as injection-production ratio can be easily *** calculation procedure developed and outlined in this paper requires very few production data and is easily ***,an oilfield case has been *** synthetic and field cases validate the calculation procedure,so it can be accurately used in forecasting production data,and it is important to optimize the whole injection-production system.

关键词： Logistic growth models Injection-production allocation Oil production Water injection rate Injection-production ratio

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ONLINE GRINDING WHEEL WEAR COMPENSATION BY IMAGE BASED MEASURING TECHNIQUES

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Chinese Journal of Mechanical Engineering 2006年第4期19卷 509-513页

作者： WAN Daping hu Dejin WU Qi ZHANG Yonghong School of Mechanical and Power Engineering Shanghai Jiaotong University Shanghai 200030 China School of Information and Communication Nanjing University of Information Science ＆ Technology Nanjing 210044 China

Automatic compensation of grinding wheel wear in dry grinding is accomplished by an image based online measurement method. A kind of PC-based charge-coupled device image recognition system is schemed out, which detects the topography changes of the grinding wheel surface. Profile data, which corresponds to the wear and the topography, is measured by using a digital image processing method. The grinding wheel wear is evalualed by analyzing the position deviation of the grinding wheel edge. The online wear compensation is achieved according to the measure results. The precise detection and automatic compensation system is integrated into an open structure CNC curve grinding machine. A practical application is carried out to fulfil the precision curve grinding. The experimental results confirm the benefits of the proposed techniques, and the online detection accuracy is less than 5 um. The grinding machine provides higher precision according to the in-process grinding wheel error compensation.

关键词： Grinding wheel Wear Compensation Online measurement Charge-coupled device (CCD)

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MECHANICAL PROPERTIES AND MICROSTRUCTURES OF Ti(C,N) BASED CERMETS

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中国有色金属学会会刊：英文版 1996年第4期6卷 117-121页

作者： Liu, N hu, ZH Cui, K Liu, CL ANhuI INST TECHNOL DEPT MAT SCI & ENGNHEFEI 230069PEOPLES R CHINA huAZHONG UNIV SCI & TECHNOL WUHAN 430074PEOPLES R CHINA BEIJING GEN RES INST IRON & STEEL BEIJING 100081PEOPLES R CHINA

ＭＥＣＨＡＮＩＣＡＬＰＲＯＰＥＲＴＩＥＳＡＮＤＭＩＣＲＯＳＴＲＵＣＴＵＲＥＳＯＦＴｉ（Ｃ，Ｎ）ＢＡＳＥＤＣＥＲＭＥＴＳ￥ＬｉｕＮｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉ... 详细信息

ＭＥＣＨＡＮＩＣＡＬＰＲＯＰＥＲＴＩＥＳＡＮＤＭＩＣＲＯＳＴＲＵＣＴＵＲＥＳＯＦＴｉ（Ｃ，Ｎ）ＢＡＳＥＤＣＥＲＭＥＴＳ￥ＬｉｕＮｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ，ＡｎｈｕｉＩｎｓｔｉｌｕｔｅ...

关键词： Ti(C,N) based cermets mechanical properties microstructure

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