搜索结果: 1-15 共查到“工学 Split”相关记录21条 . 查询时间(0.109 秒)
BUILDING FOOTPRINT DATABASE IMPROVEMENT FOR 3D RECONSTRUCTION: A DIRECTION AWARE SPLIT AND MERGE APPROACH
Photogrammetry 3D reconstruction building footprint split and merge segmentation
2016/3/1
In the context of 3D reconstruction of wide urban areas, the use of building footprints has shown to be of great help to achieve both
robustness and precision. These footprints however often present ...
Computation of Turbomachinery Flow by a Convective-Upwind-Split-Pressure (CUSP) Scheme
Turbomachinery Flow Convective-Upwind-Split-Pressure (CUSP) Scheme
2015/7/2
An artificial dissipation scheme using the concepts of SLIP and CUSP is implemented on top of a base line three-dimensional turbomachinery flow code.The original baseline code uses a finite-volume met...
AN INTERACTIVE SCHEME FOR BUILDING MODELING USING THE SPLIT-MERGE-SHAPE ALGORITHM
Three-dimensional GIS Urban,
2015/6/1
The most important feature in urban modeling is the 3D building model. It is essential in many applications, such as 3D GIS, cyber city,
true-orthophoto generation, etc. Due to the huge demand of 3D...
3D Mesh Automatic Blanking and Split Technology in Urban Planning
Building model model segmentation shape description visualization, mesh
2014/4/22
In 3D digital urban planning applications, a model file may contain multiple building models, however, a single model or model component are very often needed to be used and operated independently. Th...
Optical and electronic techniques eliminate the 10·log(N) upstream optical penalty inherent in 1×N optical splitters. With appropriate physical-layer hardware, any standards-based PON supports N > 204...
变分水平集模型已成为多相图像分割的基本框架,其求解过程通常为计算水平集函数演化方程的稳态解,计算效率不高。为提高计算效率,本研究采用n个水平集函数划分n个区域的分段常值多相图像分割变分模型,将对水平集函数的优化问题转化为对离散的二值水平集函数的优化问题;然后将其转化为凸优化问题,再通过对结果阈值化得到原问题的解,并且本研究设计了相应的Split Bregman算法;最后通过多个平面图像分割实例说明...
Fast Implementation of the Split-Step Fourier Method using a Graphics Processing Unit
Optical communications Fiber optics communications
2015/6/9
We describe how simulations based on the Split-Step Fourier Method can be significantly accelerated by using commodity graphics hardware. Results for a benchmark scenario are provided to highlight per...
128 x 8 split and 60 km Long-reach PON Transmission using 27 dB-gain Hybrid Burst-mode Optical Fiber Amplifier and Commercial Giga-bit PON System
Optical communications Fiber optics amplifiers oscillators
2015/6/5
We demonstrate error free transmission of a 128 x 8 split and 60 km long-reach PON system over 12 hours; a loss budget of over 60-dB is achieved by combining a hybrid burst-mode optical fiber amplifie...
Fortistis: Split Extension in Dense Passive Optical Networks by Inline Amplification with Remote ASE-Shaped Pump Delivery via Colorless Optical Network Units
Fiber optics communications Networks Multiplexing
2015/6/4
A method for extending the customer density via ASE-pumped splitters in the tree in a WDM/TDM-PON is presented. The influence of Rayleigh backscattering in the feeder is faced,originally prohibiting a...
A Novel Anaerobic Reactor:Split Fed Anaerobic Baffled Reactor (SFABR)
Brewery wastewater microbial ecology reactor performance
2009/10/12
Excessive substrate feeding during start-up can lead to the accumulation of volatile fatty acids and a concomitant decrease in pH in anaerobic reactors with plug flow characteristics. In addition, plu...
一种改进的Split-Merge图像分割算法
图像分割 Split-Merge算法 贪心法
2009/9/18
图像分割的经典算法Split-Merge算法思路简洁、运算效率高，但存在边界定位不准确和过分割等问题。针对过分割问题提出了一种改进的Split-Merge算法，在合并过程中引入全局目标函数，并在目标函数中定义了长度项，使用贪心法完成合并过程。长度项以及贪心法的使用促使相邻区域充分合并，有效地克服了过分割等问题，取得了较好的分割效果。
Combined modal split and assignment model for the multimodal transportation network of the economic circle in China
combined model multimodal transportation network economic circle mode choice network equilibrium variational inequality
2010/11/1
Economic circles have been formed and developing in China. An economic circle consists of more than one closely adjoining central cities and their influence zones. It is always the major engine for th...
Dual-Band Split-Ring Antenna Design for WLAN Applications
Split-ring microstrip antenna dual-band
2009/7/28
A dual-band microstrip antenna based on split-ring elements is introduced for WLAN (2.4/5.2 GHz) applications. The proposed split-ring antenna (SRA) has a compact novel design which provides about 2% ...
改进Split-Merge分割用于蝗虫图像
图像分割 分裂合并法 脉冲耦合神经网络
2009/7/22
为了更好地分割蝗虫图像，对传统Split-Merge算法做出改进：用PCNN来进行分裂，采用一种简化的Mumford-Shah模型进行合并。该方法的优点是：分裂阶段不仅无效分割数目减少，而且无方块效应，对边缘定位准确；合并阶段能够理想地将分裂后的区域合并为感兴趣的前景与不感兴趣的背景，误合并与欠合并大幅减小。实验对成虫与幼虫图像均进行分割。综合比较，该算法性能较优。
Upstream burst-mode operation of a 100km reach, 16 x 512 split hybrid DWDM-TDM PON using tuneable external cavity lasers at the ONU-side
Upstream burst-mode operation split hybrid DWDM-TDM PON tuneable external cavity lasers ONU-side
2015/7/16
This paper presents the first burst-mode system tests of a new hybrid 10Gb/s DWDM-TDM PON. The upstream channels in the network are enabled by combining novel, cost-effective tuneable ONU lasers and a...