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下颌运动分析系统在口腔修复临床应用的研究现状

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口腔颌面修复学杂志 2024年第1期25卷 51-56,63页

作者：田国兵王帆武峰山西医科大学口腔医院修复科·口腔疾病防治与新材料山西省重点实验室太原030001

随着数字化技术的发展,口腔修复领域的不同流程正在逐步跨入高效精准治疗阶段。颌位关系的正确转移是制作高质量修复体的先决条件,其中下颌运动分析系统能够记录下颌运动在动态和静态条件下的运动轨迹而显著优于传统机械面弓。当前下颌... 详细信息

随着数字化技术的发展,口腔修复领域的不同流程正在逐步跨入高效精准治疗阶段。颌位关系的正确转移是制作高质量修复体的先决条件,其中下颌运动分析系统能够记录下颌运动在动态和静态条件下的运动轨迹而显著优于传统机械面弓。当前下颌运动分析系统应用于口腔修复领域,主要包括前牙美学修复,牙体缺损修复、牙列缺损修复、颞下颌关节病变及咬合重建等。基于此,本文对下颌运动分析系统在口腔修复领域中的临床应用研究现状进行综述,以期为相关领域的临床应用和研究提供参考。

关键词：下颌运动分析系统机械面弓数字化技术虚拟架

the influence of coupling mode of methane leakage and debris input on anaerobic oxidation of methane

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Acta Oceanologica Sinica 2021年第8期40卷 78-88页

作者： Rui Xie daidai wu Jie Liu Guangrong Jin tiantian Sun Lihua Liu Nengyou wu Key Laboratory of Gas Hydrate Guangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou 510640China Guangzhou Marine Geological Survey China Geological SurveyMinistry of Natural ResourcesGuangzhou 510075China Institution of South China Sea Ecology and Environmental Engineering Chinese Academy of SciencesGuangzhou 510301China Evaluation and detection technology Laboratory of Marine Mineral Resources Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Key laboratory of Gas Hydrate Ministry of Natural ResourcesQingdao 266071China

Anaerobic oxidation of methane(AOM) is an important biogeochemical process, which has important scientific significance for global climate change and atmospheric evolution. this research examined the δ^(34)S, terrigenous clastic indices of tiO_(2) and Al_(2)O_(3), and times for formation of the Ba front at site SH1, site SH3 and site 973-4 in the South China Sea. three different coupling mechanisms of deposition rate and methane flux were discovered. the different coupling mechanisms had different effects on the role of AOM. At site 973-4, a high deposition rate caused a rapid vertical downward migration of the sulphate–methane transition zone(SMtZ), and the higher input resulted in mineral dissolution. At site SH3, the deposition rate and methane flux were basically in balance,so the SMtZ and paleo-SMtZ were the most stable of any site, and these were in a slow process of migration. At site SH1, the methane flux dominated the coupled mode, so the movement of the SMtZ at site SH1 was consistent with the general understanding. Understanding the factors influencing the SMtZ is important for understanding the early diagenesis process.

关键词： methane seep terrestrial detrital material anaerobic oxidation of methane gas hydrate

the Influence of typhoon'Hongxia'on the Intrusion of the Kuroshio Current into the South China Sea

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Journal of Ocean University of China 2023年第2期22卷 297-312页

作者： GAO Shumin HAN Shuzong WANG Shicheng wu dexing WANG Mingjie wu Kejian LIU Lili College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China Physical Oceanography Laboratory Ocean University of ChinaQingdao 266100China tianjin Key Laboratory for Oceanic Meteorology Tianjin 300074China tianjin Institute of Meteorological Science Tianjin 300074China

this paper uses the Coupled Ocean-Atmosphere-Wave-Sediment transport(COAWSt)model to analyze the impact of typhoon‘Hongxia’on the velocity and position movement of the Kuroshio axis,the impact of typhoons on the Kuroshio intrusion into South China Sea(SCS),the corresponding water,heat,and salt fluxes,and the impact of Kuroshio water in the northeastern *** typhoon‘Hongxia’passed,the Kuroshio intrusion into the SCS was the most significant at 21?N *** the vertical direction,the Kuroshio intrusion was strongest in the subsurface layer,leading to the most significant changes in temperature and salinity in the northeastern part of the SCS in the subsurface *** the influence of the southeastern monsoon in summer,a large amount of low-salinity water accumulates at the surface of the northeastern part of the SCS,and Kuroshio intrusive water remains in the bottom and middle portions of the subsurface *** westward deviation of the Kuroshio axis caused by the typhoon displays a certain lag compared with the hot and salty water intrusion into the SCS approximately 7 d *** impact of the typhoon on the Kuroshio intrusion into the SCS lasts for 20 *** typhoon caused increases in the water,heat,and salt fluxes associated with the Kuroshio intrusion into the SCS,and the contribution of the typhoon to these fluxes was as high as 40%.Under typhoon conditions,the maximum Kuroshio intrusion flux reached more than twice that before the typhoon.

关键词： typhoon Kuroshio intrusion South China Sea COAWSt coupling model flux

the existence and stability of traveling waves with transition layers for the S-K-t competition model with cross-diffusion

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Science China Mathematics 2010年第5期53卷 124-147页

作者： wu YaPing Zhao Ye Capital Normal Univ Dept Math Beijing 100048 Peoples R China Beijing Inst Petrochem technol Dept Math & Phys Beijing 102617 Peoples R China

this paper is concerned with the existence and stability of traveling waves with transition layers for a quasi-linear competition system with cross diffusion,which was first proposed by Shegesada,Kawasaki and *** one of the random diffusion rates is small and the cross-diffusion rate is not small,by the geometric singular perturbation method,the existence of traveling waves with transition layers is ***,by the detailed spectral analysis and topological index method,the traveling waves with transition layers are proved to be locally exponentially stable with shift.

关键词： traveling waves existence stability cross-diffusion spectral analysis unstable bundle

Extraordinary transmission and reflection in Pt-symmetric two-segment-connected triangular optical waveguide networks with perfect and broken integer waveguide length ratios

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Chinese Physics B 2019年第10期28卷 367-375页

作者： Jia-Ye wu Xu-Hang wu Xiang-Bo Yang Hai-Ying Li Guangzhou Key Laboratory for Special Fiber Photonic devices School of Information and Optoelectronic Science and EngineeringSouth China Normal UniversityGuangzhou 510006China Laboratory of Nonlinear Fiber Optics School of Electronic and Computer EngineeringPeking UniversityShenzhen 518055China

By adjusting the waveguide length ratio, we study the extraordinary characteristics of electromagnetic waves propagating in one-dimensional(1d) parity-time-symmetric(Pt-symmetric) two-segment-connected triangular optical waveguide networks with perfect and broken integer waveguide length ratios respectively. It is found that the number and the corresponding frequencies of the extremum spontaneous Pt-symmetric breaking points are dependent on the waveguide length ratio. Near the extremum breaking points, ultrastrong extraordinary transmissions are created and the maximal can arrive at, respectively, 2.4079 × 10^14 and 4.3555 × 10^13 in both kinds of networks. However, bidirectional invisibility can only be produced by the networks with broken integer waveguide length ratio, whose mechanism is explained in detail from the perspective of photonic band structure. the findings of this work can be useful optical characteristic control in the fabrication of Pt-symmetric optical waveguide networks, which possesses great potential in designing optical amplifiers,optical energy saver devices, and special optical filters.

关键词： parity-time symmetry optical waveguide network integer broken ratios

An Analytical Method of Calculating Back-EMF in dual Consequent Hybrid Excitation Synchronous Machine

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Chinese Journal of Electrical Engineering 2018年第1期4卷 52-59页

作者： Jie wu Jing Yin School of Electrical and Information Engineering Zhengzhou University of Light IndustryZhengzhou 450002China

In order to solve the problem of asymmetric bidirectional flux control capability in hybrid excitation machine,a novel structure called dual consequent hybrid excitation synchronous(dCHES)machine is presented in this ***,the analysis of back-EMF for the machine with complex electromagnetic structure such as dCHES machine should utilize 3-d finite element analysis(FEA),which will require huge resources and computing *** order to avoid using 3-d FEA to analyze the back-EMF of complex structure,an analytical method of calculating back-EMF is presented in this *** electromagnetic field in 3-d space can be simplified as a 2-d field by dividing the 3-d field into several simple zones,the resultant effect equals to the summation of every single 2-d field's *** to electromagnetic theory,the analytical formula of back-EMF is obtained on the basis of Fourier *** influence of main parameters on back-EMF waveform under sine and trapezoidal flux distribution is discussed *** theoretical result shows that the trapezoidal air-gap flux distribution would generate a sine ***,the presented analytical method is verified and evaluated with experimental results.

关键词： Analytical method back-EMF dCHES machine hybrid excitation machine

Numerical simulation on dendritic growth of Al-Cu alloy under convection based on the cellular automaton lattice Boltzmann method

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Chinese Physics B 2022年第9期31卷 575-586页

作者： Kang-Wei Wang Meng-wu wu Bing-Hui tian Shou-Mei Xiong School of Automotive Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Advanced technology for Automotive Components Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China

A numerical model is developed by coupling the cellular automaton(CA)method and the lattice Boltzmann method(LBM)to simulate the dendritic growth of Al-Cu alloy in both two and three *** improved decentered square algorithm is proposed to overcome the artificial anisotropy induced by the CA cells and to realize simulation of dendritic growth with arbitrary *** on the established CA-LBM model,effects of forced convection and gravity-driven natural convection on dendritic growth are *** simulation results show that the blocking effect of dendrites on melt flow is advanced with a larger number of *** competitive growth of the converging columnar dendrites is determined by the interaction between heat flow and forced ***-driven natural convection leads to highly asymmetric growth of equiaxed *** sinking downwards of the heavy solute,chimney-like or mushroom-like solute plumes are formed in the melt in front of the columnar dendrites when they grow along the gravitational *** details on dendritic growth of Al-Cu alloy under convection are revealed by 3d simulations.

关键词： simulation cellular automaton dendritic growth melt convection

融合1d-CNN与BiGRU的类不平衡流量异常检测

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计算机应用 2024年第8期44卷 2493-2499页

作者：陈虹齐兵金海波武聪张立昂辽宁工程技术大学软件学院辽宁葫芦岛125105

网络流量异常检测是利用各种检测技术分析判断网络流量,发现网络中潜在的攻击,是一种有效的网络安全防护方法。针对高维海量数据和不同攻击类别的网络流量数据不均衡而导致检测准确率低、误报率高的问题,提出一种融合一维卷积神经网络(1... 详细信息

网络流量异常检测是利用各种检测技术分析判断网络流量,发现网络中潜在的攻击,是一种有效的网络安全防护方法。针对高维海量数据和不同攻击类别的网络流量数据不均衡而导致检测准确率低、误报率高的问题,提出一种融合一维卷积神经网络(1d-CNN)和双向门控循环单元(BiGRU)的类不平衡流量异常检测模型。首先,针对类不平衡数据,通过使用改进的合成少数类过采样技术(SMOtE)即Borderline-SMOtE和基于高斯混合模型(GMM)的欠采样聚类技术进行平衡处理;然后,使用1d-CNN提取数据的局部特征,并利用BiGRU更好地提取数据中的时序特征;最后,在UNSW-NB15数据集对所提模型进行验证,所提模型的准确率为98.12%,误报率为1.28%。结果表明,所提模型提高了对少数攻击的识别率,检测精度高于其他经典机器学习和深度学习模型。

关键词：流量异常检测不平衡处理特征选择卷积神经网络双向门控循环单元

定量Ct测量身体组分在肝硬化门静脉高压并发症中的应用价值

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放射学实践 2024年第7期39卷 913-918页

作者：刘田田陈其春吴旱秋詹昊宫希军安徽医科大学第二附属医院放射科合肥230601 安徽医科大学医学影像研究中心合肥230601

目的:基于定量Ct(QCt)探讨肝硬化患者身体组分定量指标与门静脉高压并发症的相关性及其应用价值。方法:纳入2021年11月-2023年2月于本院就诊的134例肝硬化患者,受试者均行腹部Ct平扫,收集临床资料并用QCt Pro软件测量每例受试者L2/3层... 详细信息

目的:基于定量Ct(QCt)探讨肝硬化患者身体组分定量指标与门静脉高压并发症的相关性及其应用价值。方法:纳入2021年11月-2023年2月于本院就诊的134例肝硬化患者,受试者均行腹部Ct平扫,收集临床资料并用QCt Pro软件测量每例受试者L2/3层面皮下及内脏脂肪面积(SAt、VAt)、腰椎骨密度(BMd)、肝脏脂肪分数(Fat%-QCt)、L3椎体水平全腹肌和椎旁肌面积(SMA、PMA)及肌内脂肪面积并计算肌内脂肪含量(IMAC-S、IMAC-P)。在不同Child-Pugh分级中进行组间资料对比,并根据有无门静脉高压并发症将患者分为两组比较身体组分差异,Mann-Whitney U检验或Kruskal-Wallis H检验、t检验或单因素ANOVA检验、χ^(2)检验用于各组间基本资料与身体组分的差异性分析;采用二元Logistic回归分析与肝硬化门静脉高压并发症相关的QCt指标,采用受试者操作特征(ROC)曲线分析不同模型的识别效能。结果:Fat%-QCt、SAt、椎旁肌内脂肪面积、IMAC-P在不同Child-Pugh分级中差异有统计学意义(Ptic回归分析显示SAt是肝硬化门静脉高压并发症的独立相关因素(Pt、SAt联合全腹肌指标、SAt联合椎旁肌指标的ROC曲线下面积(AUC)分别为0.727、0.772、0.769(Pt联合全腹肌指标的敏感度及特异度分别为0.734、0.800,优于SAt、SAt联合椎旁肌指标,识别效能最高。结论:SAt减少是肝硬化门静脉高压并发症风险增加的独立危险因素,SAt联合全腹肌指标能较好地识别肝硬化门静脉高压并发症。

关键词：肝硬化门静脉高压,并发症身体组分定量Ct