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护砌管沟法在高水位流砂地段的应用

石油工程建设 2009年第5期35卷 24-25页

作者：张强牟宗元于颖辽河油田油建二公司辽宁盘锦124010

福建LNG管道工程途经的泉港区涂岭镇汶阳村段,属于海冲击平原,地表0.1 m以下为砂砾,遇水液化,无法成沟,而且LNG管道与一条沿河堤的自来水管道平行敷设,间距仅2 m,LNG管道施工时必须保证自来水管道的安全。文章以该段工程为例,介绍了在... 详细信息

福建LNG管道工程途经的泉港区涂岭镇汶阳村段,属于海冲击平原,地表0.1 m以下为砂砾,遇水液化,无法成沟,而且LNG管道与一条沿河堤的自来水管道平行敷设,间距仅2 m,LNG管道施工时必须保证自来水管道的安全。文章以该段工程为例,介绍了在高水位流砂地段敷设管道时,采用小型轮式机械开挖管沟和用编织袋装砂砾石护砌的施工方法,不但成功解决了管沟成型和近距离自来水管道保护两个施工难题,而且方案操作简易可行、安全可靠。

关键词：高水位地段砂砾层管道敷设管沟护砌

AN OUTBREAK OF LEGIONNAIRES' DISEASE

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中华医学杂志(英文版) 1987年第12期100卷 956-956页

作者： Wang Yan-ying Zhang Shi-qing Wang Jia-ming Sun Shao-yin mu zong-yuan Bai Da-zhong Wan Chao-qun Li Jin-rui Anti-epidemicStation FangshanCounty Beijing Anti-epidemicStation FangshanCounty Beijing Anti-epidemicStation FangshanCounty Beijing Anti-epidemicStation FangshanCounty Beijing Anti-epidemicStation FangshanCounty Beijing Anti-epidemicStation FangshanCounty Beijing InstituteofEpidemiologyandMicrobiology ChineseAcademyofPreventiveMedicine BeijingAnti-EpidemicStation Beijing

An outbreak of type I Legionnaires' disease (LD) was confirmed etiologically and serologically. The morbidity was 38.2%. No significant correlation was found between incidence and sex, or age, or history of smoking. The case distribution showed a significant degree of housing (p<0.01). The possibility of infection through water and air contamination was eliminated. This paper shows evidence of person-to-person transmission. The infection may affect many body systems and lacks specific symptoms in our 39 LD cases.

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3D Vane序列结合膈肌导航技术在肝脏TIWI中应用的可行性探讨

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中国CT和MRI杂志 2025年第1期23卷 109-111页

作者：穆晶袁颖首都医科大学附属北京友谊医院放射科北京100050

目的对比分析常规肝脏T1WI快速成像屏气检查3D mDixon序列与应用膈肌导航技术在自由呼吸下采集的3D Vane序列的图像质量,探讨膈肌导航技术结合3D Vane序列自由呼吸下扫描肝脏T1WI检查中的可行性。方法选取2023年3月至10月期间的70名肝... 详细信息

目的对比分析常规肝脏T1WI快速成像屏气检查3D mDixon序列与应用膈肌导航技术在自由呼吸下采集的3D Vane序列的图像质量,探讨膈肌导航技术结合3D Vane序列自由呼吸下扫描肝脏T1WI检查中的可行性。方法选取2023年3月至10月期间的70名肝脏MR扫描患者,根据患者屏气情况分成A组(≥18s)、B组(0.05)。实验B组3D Vane序列的SNR为35.84±9.10,高于3D mDixon序列,差异有统计学意义(P<0.05),实验B组3D Vane序列图像主观评分均高于3D mDixon序列,差异有统计学意义(P<0.05)。结论膈肌导航技术结合3D Vane序列可用于腹部T1WI中扫描。对于屏气欠佳或无法屏气配合的患者可在自由呼吸下扫描,获得到满足诊断要求的影像。

关键词：膈肌导航技术 3D VANE 自由呼吸肝脏T1WI

Research of Automated Test Case Generation for Spreadsheet Part in Document Format Translator

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Chinese Journal of Electronics 2014年第2期23卷 243-247页

作者： mu Yongmin DING yuan Beijing Information Science & Technology University

Document format translator can achieve information sharing and interoperability between the office document national standard UOF(Uniform office format) and the international standard ISO29500(Open office XML, OOXML). There are several difficult issues in the manual test of document format translator: the manual test case design is complicated due to the complexity of document standard; test case coverage rate is hard to evaluate and test blind spots are hard to avoid. This paper brings about methods to solve these problems by achieving automated test case generation. Analyzing the XML Schema of document standard in logical level, building UML object model in conceptual level, designing objectoriented algorithm based on *** platform, operate the underlying XML code of spreadsheet in physical level,and then compress underlying XML code to generate new spreadsheet documents as test case. A formal definition about the UOF document standard is presented and statistics of functional test point is conducted so as to measure test case coverage rate. Experiments have shown that this method can realize the automated generation of test cases,improve the efficiency of test work, decrease test case redundancy and avoid test blind spots.

关键词： Document format standard Office software Automated test case generation XML

Fatigue-crack-initiation numerical modelling of a Ni-base powder metallurgy alloy

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航空动力学报 2012年第12期27卷 2778-2785页

作者： mu, yuan-Wei Lu, Shan Zhang, Hong School of Power and Energy Northwestern Polytechnical University Xi'an 710072 China

A simplified three-dimensional numerical model was presented to simulate the micro-crack nucleation and growth to some predefined dimension(approximately 0.38 mm) on the throat surface of a Ni-base powder metallurgy(PM) *** numerical simulation of micro-crack initiation was based on the Tanaka-mura micro-crack initiation models,where individual grains of the mesoscopic model were simulated using the Voronoi *** improvements were made in the model.(1) Considering crack initiation along with 12 principal slip systems on octahedral slip planes of face centered cubic(FCC) crystal in three-dimensional(3-D) models.(2) Considering the effect of secondary phase precipitate due to impinging slip and dislocation pileup.(3) The Tanaka-mura theory of fatigue-crack-initiation from notches was applied to simulate the crack initiation from another crack tip.(4) The coalescence of random initiated micro-cracks was simulated once they intersected with each other and a macro-crack was finally *** calculated results were in good agreement with the experimental data which verified the rationality of the simulation *** applicability of the proposed model for treating fatigue-crack-initiation life in engineering structures was preliminarily achieved.

关键词：信号模拟动力系统数字化 3D模型

A Lightweight Network with Dual Encoder and Cross Feature Fusion for Cement Pavement Crack Detection

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Computer Modeling in Engineering & Sciences 2024年第7期140卷 255-273页

作者： Zhong Qu Guoqing mu Bin yuan School of Computer Science and Technology Chongqing University of Posts and TelecommunicationsChongqing400065China School of Software Engineering Chongqing University of Posts and TelecommunicationsChongqing400065China

Automatic crack detection of cement pavement chiefly benefits from the rapid development of deep learning,with convolutional neural networks(CNN)playing an important role in this ***,as the performance of crack detection in cement pavement improves,the depth and width of the network structure are significantly increased,which necessitates more computing power and storage *** limitation hampers the practical implementation of crack detection models on various platforms,particularly portable devices like small mobile *** solve these problems,we propose a dual-encoder-based network architecture that focuses on extracting more comprehensive fracture feature information and combines cross-fusion modules and coordinated attention mechanisms formore efficient feature ***,we use small channel convolution to construct shallow feature extractionmodule(SFEM)to extract low-level feature information of cracks in cement pavement images,in order to obtainmore information about cracks in the shallowfeatures of *** addition,we construct large kernel atrous convolution(LKAC)to enhance crack information,which incorporates coordination attention mechanism for non-crack information filtering,and large kernel atrous convolution with different cores,using different receptive fields to extract more detailed edge and context ***,the three-stage feature map outputs from the shallow feature extraction module is cross-fused with the two-stage feature map outputs from the large kernel atrous convolution module,and the shallow feature and detailed edge feature are fully fused to obtain the final crack prediction *** evaluate our method on three public crack datasets:DeepCrack,CFD,and *** results on theDeepCrack dataset demonstrate the effectiveness of our proposed method compared to state-of-the-art crack detection methods,which achieves Precision(P)87.2%,Recall(R)87.7%,and F-score(F1)87.4%.Thanks to our lightweight cr

关键词： Shallow feature extraction module large kernel atrous convolution dual encoder lightweight network crack detection

Ghost Module Based Residual Mixture of Self-Attention and Convolution for Online Signature Verification

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Computers, Materials & Continua 2024年第4期79卷 695-712页

作者： Fangjun Luan Xuewen mu Shuai yuan Department of Computer Technology School of Computer Science and EngineeringShenyang Jianzhu UniversityShenyang110168China Liaoning Province Big Data Management and Analysis Laboratory of Urban Construction Shenyang Jianzhu UniversityShenyang110168China Shenyang Branch of National Special Computer Engineering Technology Research Center Shenyang Jianzhu UniversityShenyang110168China

Online Signature Verification (OSV), as a personal identification technology, is widely used in various ***, it faces challenges, such as incomplete feature extraction, low accuracy, and computational heaviness. Toaddress these issues, we propose a novel approach for online signature verification, using a one-dimensionalGhost-ACmix Residual Network (1D-ACGRNet), which is a Ghost-ACmix Residual Network that combines convolutionwith a self-attention mechanism and performs improvement by using Ghost method. The Ghost-ACmix Residualstructure is introduced to leverage both self-attention and convolution mechanisms for capturing global featureinformation and extracting local information, effectively complementing whole and local signature features andmitigating the problem of insufficient feature extraction. Then, the Ghost-based Convolution and Self-Attention(ACG) block is proposed to simplify the common parts between convolution and self-attention using the Ghostmodule and employ feature transformation to obtain intermediate features, thus reducing computational ***, feature selection is performed using the random forestmethod, and the data is dimensionally reducedusing Principal Component Analysis (PCA). Finally, tests are implemented on the MCYT-100 datasets and theSVC-2004 Task2 datasets, and the equal error rates (EERs) for small-sample training using five genuine andforged signatures are 3.07% and 4.17%, respectively. The EERs for training with ten genuine and forged signaturesare 0.91% and 2.12% on the respective datasets. The experimental results illustrate that the proposed approacheffectively enhances the accuracy of online signature verification.

关键词： Online signature verification feature selection ACG block ghost-ACmix residual structure

Methacrylated gelatin and platelet-rich plasma based hydrogels promote regeneration of critical-sized bone defects

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Regenerative Biomaterials 2024年第4期3卷 66-81页

作者： Shichao Lian Zhiyu mu Zhengchao yuan muhammad Shafiq Xiumei Mo Weidong mu Department of Traumatic Orthopaedics Shandong Provincial HospitalShandong UniversityJinanShandong 250012China Zoucheng People’s Hospital ZouchengShandong 273500China Department of Medical Physics and Biomedical Engineering University of LondonLondon WC1E 6BTUK State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative MedicineCollege of Biological Science and Medical EngineeringDonghua UniversityShanghai 201620PR China Innovation Center of NanoMedicine(iCONM) Kawasaki Institute of Industrial PromotionKawasaki-KuKawasaki 210-0821Japan

Physiological repair of large-sized bone defects requires instructive scaffolds with appropriate mechanical properties,biocompatibility,biodegradability,vasculogenic ability and *** objective of this study was to fabricate in situ injectable hydrogels using platelet-rich plasma(PRP)-loaded gelatin methacrylate(GM)and employ them for the regeneration of large-sized bone *** performed various biological assays as well as assessed the mechanical properties of GM@PRP hydrogels alongside evaluating the release kinetics of growth factors(GFs)from *** GM@PRP hydrogels manifested sufficient mechanical properties to support the filling of the tissue *** biofunction assay,the GM@PRP hydrogels significantly improved cell migration and ***,transcriptome RNA sequencing of human umbilical vein endothelial cells and bone marrow-derived stem cells were performed to delineate vascularization and biomineralization abilities of GM@PRP *** GM@PRP hydrogels were subcutaneously implanted in rats for up to 4 weeks for preliminary biocompatibility followed by their transplantation into a tibial defect model for up to 8 weeks in *** defects treated with GM@PRP hydrogels manifested significant bone regeneration as well as angiogenesis,biomineralization,and collagen *** on the biocompatibility and biological function of GM@PRP hydrogels,a new strategy is provided for the regenerative repair of large-size bone defects.

关键词： large-sized bone defect repair platelet-rich plasma hydrogel tissue scaffold gelatin methacrylate

Mechanism Study of Transport and Distributions of Trace Metals in the Bohai Bay, China

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China Ocean Engineering 2019年第1期33卷 73-85页

作者： LI yuan-yi FENG Huan yuan De-kui GUO Lei mu Di Department of Mechanics School of Mechanical EngineeringTianjin University State Key Laboratory of Hydroscience and Engineering Department of Hydraulic EngineeringTsinghua University Department of Earth and Environmental Studies Montclair State University Guangdong Research Institute of Water Resources and Hydropower School of Marine Science and Engineering Hebei University of Technology

This study shows that there are two regions with high trace metal concentrations in the Bohai Bay, China. The numerical hydrodynamic model coupled with geochemical analysis was applied to understand the mass transport and sedimentation in the bay. The modeling results show that the two regions are located within the residual current vortexes. Results from the particle-tracking model indicate that the trace metals released from the land sources enter the regions and take a relatively long residence time in the vortexes. The sediment radionuclide data indicates that the two regions experienced continuous and high sedimentation, and trace metals are prone to deposit in the regions. The correlations among trace metals, residual currents and radionuclides data suggest that the tides are the governing factor controlling the distributions of the trace metals in the bay. The consistence among these results also supports the reliabilities of the numerical simulation results of water and trace metal transport in this study.

关键词： trace metal sediments sedimentation radionuclides numerical model residual current