搜索结果: 1-10 共查到“工学 apples”相关记录10条 . 查询时间(0.015 秒)
Optimization of Osmotic Dehydration of Apples Slices in Dates Syrup Using the Response Surface Methodology
Apples Slices Dates Syrup
2016/6/2
Osmotic dehydration of apple slices in continuous kinetic was studied using dates syrup at different concentration (52-74%), temperature (30-60°C), time (15-240 min). The response surface methodology ...
基于机器视觉和信息融合的邻接苹果分割算法（Separating Adjoined Apples Based on Machine Vision and Information Fusion）
苹果 机器视觉 信息融合
2009/11/24
提出了利用亮度和颜色的信息融合来分割邻接苹果的方法。首先使用Lab模型对苹果图像进行分割，然后计算分割后每个区域的面积，并判断其是否为邻接苹果区域。接着在邻接区域内计算亮度信息，利用亮度产生的亮斑对邻接苹果进行分割。这样，在邻接区域以外的部分，亮度信息产生的噪声被Lab模型的信息屏蔽，而邻接区域以内的部分，具有惟一性的亮度信息可以较好分割经Lab模型处理后的邻接苹果。实验表明，此算法对邻接苹果识别...
电激励信号频率对红点病苹果采后电学特性影响（Influence of Frequency of Electric Excitation Signal on Dielectric Property of Fuji Apples with Red-dot Disease）
苹果 红点病 电特性 激励信号
2009/11/3
研究了红点病富士苹果采后果实电特性的变化规律，为从电特性角度揭示红点病病害发病的内在机制提供理论参考。运用LCR电子测量仪测定了20℃恒温条件下贮藏70 d的红点病果实在100 Hz、1 kHz、10 kHz、100 kHz和1?MHz频率下复阻抗等电学参数。结果表明，在同一贮藏时间下，随着频率的增加，不论是病果还是正常果其果实的介电常数ε′、复阻抗Z、电抗X和电感Lp值均在减小；果实的Z、X和...
基于K均值聚类的绿色苹果识别技术（Segmentation Algorithm for Green Apples Recognition Based on K-means Algorithm）
苹果 机器视觉 图像识别
2009/11/3
针对颜色和背景相近的绿色苹果，提出了一种基于K-均值聚类的苹果图像识别算法。该算法以8×8像素的正方形区域为分割单位。选择颜色差R-B作为颜色特征，选择灰度均值m，标准偏差σ和熵e作为纹理特征，形成特征向量空间。采用间隙统计法确定苹果图像的最佳聚类数。 将特征向量空间和最佳聚类数作为输入，运用本文算法对苹果图像进行聚类和分割。对200幅图像识别实验结果表明，在顺光和逆光情况下，算法均能实现果实与背...
基于机器视觉的苹果识别和形状特征提取（Recognition and Shape Features Extraction of Apples Based on Machine Vision）
苹果 机器视觉 图像识别
2009/9/11
提出了利用色差R—G和色差比(R—G)/(G—B)相结合的苹果识别方法。在顺光、逆光等不同情况下对拍摄的苹果图像进行了识别，并对识别后的图像进行消除噪声、区域填充等预处理，获得苹果的轮廓图像。针对轮廓图像，采用遗传算法进行形状特征提取。采取多次运行遗传算法，并依次转换目标轮廓点为背景点的方法，处理果实图像邻接、重叠问题。实验结果表明：苹果识别方法在一定程度上消除了阴影、逆光、土壤等影响，识别率达9...
Comparison of Soluble and Plastidal Polyphenol Oxidase in Mature Apples
polyphenol oxidase plastid subcellular localization
2009/6/17
Polyphenol oxidase (PPO) is transported to plastid after translation. However, we often detect PPO activity in a soluble fraction of apple. Here we examined the location of PPO in retail apples. PPO a...
The Effect of Ultrasound Pre-Treatment and Air-Drying on the Quality of Dried Apples
fresh apple dried apple ultrasound and air-drying process sensory properties
2014/3/10
In order to develop environmentally sound, energy inexpensive and well scalable drying techniques that maintain high quality of dried fruit, optimisation of integrated process (ultrasound and air-dryi...
Mathematical Modelling of Some Nutrient Losses during Heat Treatment of Stewed Apples
Keywords vitamin C polyphenols model reaction Arrhenius
2014/3/10
Vitamin C (later noted VITC) and polyphenols (later noted PP) were regarded as main nutritional markers in the transformation process of stewed apples after an in situ measurement campaign at two lead...
Monitoring of pesticide residues in apples from Slovakia for baby food production
pesticides apples baby food sample preparation fast CG
2014/3/17
There is a basic lack of information about the presence of pesticide residues in apples obtained from farms in Slovakia collaborating with baby food producer. Residues of several pesticides (widely us...
Evaluation of long term storage of apples by means of fractal analysis
storage fractal apples flesh structure
2014/2/28
Realization of long-term apple storage requires the most detailed information about the flesh structure and texture, whose quality is contributing by responsible way to the whole quality of the evalua...