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DETERMINING TOOTH OCCLUSAL SURFACE RELIEF INDICATOR BY MEANS OF AUTOMATED 3D SHAPE ANALYSIS
Photogrammetry 3D reconstruction Automation Non-contact measurements Odontometry
2017/6/19
Determining occlusal surface relief indicator plays an important role in odontometric tooth shape analysis. An analysis of the parameters of surface relief indicators provides valuable information abo...
PHOTOGRAMMETRY-BASED AUTOMATED MEASUREMENTS FOR TOOTH SHAPE AND OCCLUSION ANALYSIS
Photogrammetry 3D reconstruction Automation Segmentation Dentistry Odontometry Occlusiometry Odontotomy
2016/11/11
Tooth measurements (odontometry) are performed for various scientific and practical applications, including dentistry. Present-day techniques are being increasingly based on 3D model use that provides...
Challenges of Photogrammetric Intra-Oral Tooth Measurement
Medicine Dentistry Automation Application
2015/12/17
Recording the surface shape of a living tooth would seem to be a straightforward photogrammetric task, but the researchers’
experiences in developing a procedure for routine intra-oral tooth measurem...
Three-dimensional image analysis for quantification of tooth movements and landmark changes
Orthodontics Dental Image Tooth Movement Three-dimensional
2015/1/12
Quantification of treatment outcomes (tooth displacement and bony changes) is the key to advance orthodontic research and improve clinical practices. Traditionally, treatment outcome were quantified b...
Tooth Cusp Radius of Curvature as a Dietary Correlate in Primates
Tooth Cusp Radius Curvature Dietary Correlate Primates
2014/10/24
Tooth cusp radius of curvature (RoC) has been hypothesized to play an important role in food item breakdown, but has remained largely unstudied due to difficulties in measuring and modeling RoC in mul...
Geometry Design and Tooth Contact Analysis of Crossed Beveloid Gears for Marine Transmissions
beveloid gears loaded tooth contact analysis crossed axes marine transmission
2011/8/5
Beveloid gears, also known as conical gears, gain more and more importance in industry practice due to their abilities for power transmission between parallel, intersected and crossed axis.
双压力角非对称齿轮轮齿接触分析（Tooth Contact Analysis for Unsymmetric Gear with Double Pressure Angles）
齿轮传动 轮齿接触分析 双压力角
2010/12/28
对双压力角非对称齿轮在修形和误差条件下的啮合过程进行了全面推导，并编制了轮齿接触分析(TCA)计算机数值仿真程序。通过对非对称齿轮与标准对称齿轮进行仿真计算，得出双鼓形非对称齿轮在有安装误差的情况下，接触迹的偏移量比标准对称齿轮小，传动误差的幅值比标准对称齿轮有明显降低，因此具有良好的传动平稳性和较高的承载能力。
四轴联动数控螺旋锥齿轮铣齿机的齿长曲率修正（4-axis CNC Spiral Bevel Gear Machine Tooth-profile Lengthwise Curvature Modification）
螺旋锥齿轮铣齿机 加工坐标系 轮齿接触分析
2010/12/28
常规机床对螺旋锥齿轮的齿长曲率进行修正时，需从机床上拆装铣刀盘，并重新调整其行程直径，过程繁琐。对此利用国产四轴数控铣齿机，建立铣齿加工坐标系，以及径向刀位、切削滚比变化多项式。用轮齿接触分析（TCA）的方法，以被加工齿面的接触路径、传动误差作为评价目标，研究径向刀位、切削滚比的变化对齿长曲率修正的规律。TCA分析及铣齿实验结果表明，不改变铣刀盘直径，即可实现对齿长曲率的修正，同时可更加灵活地控制...
Develop mono-block tooth implants using automate design and FEM analysis
Automation engineering process CAD systems CAM systems Mono-block Dental implant
2009/12/1
Purpose: Purpose of this paper is present a new approach to modelling and design the low cost mono-block
dental implants based on the integration of the computer aided techniques. This approach prov...
机床误差对螺旋锥齿轮齿形的影响规律（Effect of Machine Tool Errors on the Tooth Form of Spiral Bevel Gears）
螺旋锥齿轮 机床误差 齿形 理论齿面
2009/8/11
基于螺旋锥齿轮齿面分析的数学模型，采用最优化算法和一种新的计算齿形误差的方法，计算了误差齿面与理论齿面在理论齿面法线方向的齿形误差。通过引入机床调整误差和刀具参数误差，分析了各种误差对螺旋锥齿轮齿形的影响规律，以图形的方式表示了误差齿面相对于理论齿面的偏离方向以及误差值的大小，为机床的精度设计、齿形误差的修正以及指导实际加工提供了理论依据。通过实际的磨齿加工和检测对算法以及分析结果进行了验证。
研究了基于数控加工螺旋锥齿轮齿面误差修正技术。提出了一种由摇台型机床调整参数向Free-Form机床转换的方法，建立了基于数控加工齿面误差模型；在此基础上，以齿面误差平方和最小为目标函数，优化摇台型机床调整参数，再将其转换为数控加工形式，从而实现数控齿面修正。最后通过算例表明，经过改变加权系数和优化可以达到齿面误差较高精度修正要求。 Based on NC machining, the tooth...
OTDM Add–Drop Multiplexer using a Saw-Tooth Pulse Shaper
OTDM Add–Drop Multiplexer Saw-Tooth Pulse Shaper
2015/8/6
We experimentally demonstrate the use of saw-tooth control pulses to enhance the performance of time-domain add–drop multiplexers based on cross-phase modulation in fibre and subsequent offset filteri...
Timing jitter tolerant OTDM Demultiplexing using a Saw-Tooth Pulse Shaper
Timing jitter tolerant OTDM Demultiplexing Saw-Tooth Pulse Shaper
2015/7/31
Saw-tooth pulses, shaped using a fiber Bragg grating, provide timing jitter tolerant OTDM data demultiplexing in a scheme based on cross-phase modulation in fibre, with subsequent offset filtering.