搜索结果: 1-15 共查到“知识库 工学 STEM”相关记录21条 . 查询时间(0.328 秒)
Simultaneous expansion and harvest of hematopoietic stem cells and mesenchymal stem cells derived from umbilical cord blood
生物反应器 UCB MSCs RWV GCSC
2023/3/1
The simultaneous expansion and harvest of hematopoietic stem cells and mesenchymal stem cells derived from umbilical cord blood were carried out using bioreactors. The co-culture of umbilical cord blo...
FOREST STEM VOLUME CALCULATION USING AIRBORNE LIDAR DATA
Aerial LiDAR nDSM tree height canopy height stand volume Pleaides multispectral image
2017/7/12
Airborne LiDAR data have been collected for the city of Istanbul using Riegl laser scanner Q680i with 400 kHz and an average flight height of 600 m. The flight campaign was performed by a ...
TREE STEM RECONSTRUCTION USING VERTICAL FISHEYE IMAGES: A PRELIMINARY STUDY
Dense Reconstruction Fisheye Image Rectification Photogrammetry
2016/11/11
A preliminary study was conducted to assess a tree stem reconstruction technique with panoramic images taken with fisheye lenses. The concept is similar to the Structure from Motion (SfM) technique, b...
FAST AND ROBUST STEM RECONSTRUCTION IN COMPLEX ENVIRONMENTS USING TERRESTRIAL LASER SCANNING
Terrestrial Laser Scanning Stem Detection Cylinder Fitting RANSAC Self-adaptive Cylinder Growing Point Cloud Sampling
2016/7/27
Terrestrial Laser Scanning (TLS) is an effective tool in forest research and management. However, accurate estimation of tree parameters still remains challenging in complex forests. In this paper, we...
COMBINED TREE SEGMENTATION AND STEM DETECTION USING FULL WAVEFORM LIDAR DATA
LIDAR Analysis Segmentation Forestry Vegetation
2015/11/10
The study highlights a new method for the delineation of tree crowns and the detection of stem positions of single trees from dense airborne LIDAR data. At first, we combine a method for surface recon...
Use of nonparametric regression methods for developing a local stem form model
Norway spruce spline stem curve taper
2015/5/5
: A local mean stem curve of spruce was represented using regression splines. Abilities of smoothing spline
and P-spline to model the mean stem curve were evaluated using data of 85 carefully measur...
BIOMASS ESTIMATION OF INDIVIDUAL TREES USING STEM AND CROWN DIAMETER TLS MEASUREMENTS
Terrestrial laser scanning biomass tree measurements
2014/6/5
The objective of this study was to make preliminary investigations between accurately measured field biomasses and terrestrial laser scanning (TLS) measurements including tree crown and stem diameters...
ESTIMATION OF TREE STEM ATTRIBUTES USING TERRESTRIAL PHOTOGRAMMETRY
Measurement Image Algorithms Forestry Inventory Point Cloud Close Range Method
2014/4/28
The objective of this work was to create a method to measure stem attributes of standing trees on field plots in the forest using terrestrial photogrammetry. The primary attributes of interest are the...
Stem cell technology using bioceramics: hard tissue regeneration towards clinical application
Stem cell technology bioceramics hard tissue regeneration towards clinical application
2010/10/12
Mesenchymal stem cells (MSCs) are adult stem cells which show differentiation capabilities toward various cell lineages. We have already used MSCs for treatments of osteoarthritis, bone necrosis and b...
Artificial extracellular matrix for embryonic stem cell cultures: a new frontier of nanobiomaterials
Artificial extracellular matrix embryonic stem cell cultures frontier of nanobiomaterials
2010/10/12
Nanobiomaterials can play a central role in regenerative medicine and tissue engineering by facilitating cellular behavior and function, such as those where extracellular matrices (ECMs) direct embryo...
基于计算机视觉的葡萄茎直径高精度测量方法（High Accuracy Measurement of Grape Stem Diameter Based on Computer Vision）
萄萄 茎直径 计算机视觉 非接触测量 图像处理
2009/12/28
提出了基于计算机视觉的葡萄茎直径测量方法，采用双边滤波降低图像噪声，通过Otsu阈值分割和BloB分析实现葡萄茎与背景的分离，应用基于特征点的定位方法得到茎直径测量位置，由茎直径所包含像素数和尺寸当量计算出茎直径值，从而实现茎直径连续测量。实验和现场应用表明，系统测量重复精度可达±0.5μm。
Response of cambium in Norway spruce (Picea abies) to heating and cooling of stem
Norway spruce (Picea abies) cambium cell differentiation xylem phloem heating cooling
2009/11/26
The effect of experimental heating and cooling in a part of the stem of Norway spruce (Picea abies) on cambial activity and cell differentiation was studied. Experiments were performed for 30 days; he...
Research on the Control of Growth/Differentiation of Tissue Stem Cells; Possible Applications of Laser Technology for the Understanding of Inductive Tissue Regeneration
Fregenerative medicine Stem cell Differentiation
2009/6/8
In addition to infectious diseases, life-style related diseases become a more common reason for medication of elderly people than ever. Dysfunction of organs is an underlying cause of these diseases. ...
The effectiveness of pineapple stem protease (bromelain) in enzymatic browning inhibition was evaluated on apple juice and compared with that of L-cysteine and ascorbic acid at 25±1°C. The relative ef...
Porous hydroxyapatite and biphasic calcium phosphate ceramics promote ectopic osteoblast differentiation from mesenchymal stem cells
calcium phosphate ceramics porous structure osteogenesis
2010/1/19
Because calcium phosphate (Ca–P) ceramics have been used as bone substitutes, it is necessary to investigate what effects the ceramics have on osteoblast maturation. We prepared three types of Ca–P ce...