AN APPLICATION OF IMAGE PROCESSING TECHNIQUES IN COMPUTED TOMOGRAPHY IMAGE ANALYSIS     

FINTAN J. McEVOY 《Veterinary radiology & ultrasound》2007,48(6):528-534

An estimate of the thickness of subcutaneous adipose tissue at differing positions around the body was required in a study examining body composition. To eliminate human error associated with the manual placement of markers for measurements and to facilitate the collection of data from a large number of animals and image slices, automation of the process was desirable. The open-source and free image analysis program ImageJ was used. A macro procedure was created that provided the required functionality. The macro performs a number of basic image processing procedures. These include an initial process designed to remove the scanning table from the image and to center the animal in the image. This is followed by placement of a vertical line segment from the mid point of the upper border of the image to the image center. Measurements are made between automatically detected outer and inner boundaries of subcutaneous adipose tissue along this line segment. This process was repeated as the image was rotated (with the line position remaining unchanged) so that measurements around the complete circumference were obtained. Additionally, an image was created showing all detected boundary points so that sites of measurement could be checked by visual inspection. This paper provides a detailed account of this macro, illustrates the effect of its components on the image, and the applicability of standard image processing techniques to veterinary imaging.  相似文献   

The whole amino acid profile as indicator of the nutritional condition in cultured marine fish larvae     

J.B. CARA  F.J. MOYANO  J.L. ZAMBONINO  & F.J. ALARCÓN 《Aquaculture Nutrition》2007,13(2):94-103

The effect of variations in the amount or quality of food provided on the amino acid profile of larvae, was tested in two marine fish species, the Senegal sole (Solea senegalensis) and the sea bass (Dicentrarchus labrax). The objective was to assess whether such nutritionally suboptimum dietary patterns, which simulate situations that may occur in hatcheries, result in variations in the concentration of one or more amino acids that could be used as indicators of nutritional condition of larvae. Restriction in the normal food ration by 60% had no clear effect on the amino acid profile of sea bass, while the concentration of some amino acids (Arg, Ala and Phe) showed significant variations in sole. Feeding on artificial diets, which have shown their inadequacy a priori, resulted also in no significant effect on the profile of sea bass, but in a dramatic modification of the amino acid profile in sole. In addition, changes in the amino acid profiles considered as a whole were evaluated using the cluster analysis instead of paired comparisons between amino acid concentrations in each treatment. The analysis clearly separated profiles of larvae fed restrictedly or inadequately from their controls, irrespective of the species. This demonstrated the potential value of evaluating whole changes in amino acid profile as nutritional indicator. Besides, it was demonstrated that sensitivity of larvae to nutritional changes that may be reflected in the amino acid profile is greatly conditioned by the species and developmental stage.  相似文献   

基于AHP的道路黑点交通安全影响因素分析及应用   总被引：1，自引：1，他引：0  

丁柏群  田丰福 《森林工程》2007,23(5):62-64

阐述道路黑点交通事故的生成特征,通过AHP法建立交通安全影响因素的层次结构模型,形成了诸因素重要程度量化分析方法,为减少和预防密集型交通事故提供切实依据;应用该方法对某大型交叉口进行了分析和计算,确定了各安全影响因素的权重,提出了相应的安全保障措施。  相似文献   

农药产品中添加未经登记成分的调查与分析     

黄琼辉 《福建农业学报》2012,27(4):437-442

通过连续6年的福建省农药市场监测,对擅自添加未经登记农药成分的278份样品进行统计分析,研究表明:被添加农药的产品主要为杀虫剂,剂型主要为乳油、可湿性粉剂,多登记在蔬菜、果树、茶树、水稻、棉花上;添加的农药品种主要为有机磷类和拟除虫菊酯类杀虫剂,其防治对象与原产品相比有的属于防治谱相同,有的属于扩大杀虫谱。同时指出该行为的危害性,提出加强监管、出台检测标准和判定标准的建议。  相似文献   

液相色谱-离子阱质谱联用技术定性检测渔药中喹诺酮类抗菌素   总被引：2，自引：0，他引：2  

邹红梅 《福建水产》2007,(2):24-27

建立了高效液相色谱-质谱联用技术定性检测渔药中喹诺酮类抗菌素的方法.利用喹诺酮类化合物的质荷比(m/z)和其荧光光谱特性对渔药中恩诺沙星、环丙沙星、诺氟沙星、氧氟沙星四种喹诺酮类化合物进行定性分析,结果表明该方法快速可行,方法检出限分别为1.29 ng、1.23 ng、1.08 ng、1.00 ng,可用于渔药中喹诺酮类抗菌素的监控.  相似文献   

旱区农业要大力推广喷灌与滴灌机械化   总被引：1，自引：0，他引：1  

李有田 《中国农机化》2007,(1):37-38

经过对喷灌与滴灌技术原理的探讨,提出旱区农业要发展推广喷灌和滴灌技术,并就喷灌与滴灌技术应用中的选型、配置、安装等方面的问题作分析。  相似文献   

苦水玫瑰产地土壤重金属污染评价与溯源解析     

李军  杨云钦  台喜生  焦亮  陈伟  臧飞  李开明 《农业工程学报》2023,39(16):223-234

探明特色农产品产地土壤重金属污染特征及其污染来源可促进特色农作物产业的健康有序发展,对于助力乡村振兴和发展乡村特色产业具有重要意义。该研究以苦水玫瑰产地土壤为研究对象,应用内梅罗综合污染指数法、污染负荷指数法和改进物元可拓模型来量化土壤重金属As、Cd、Cr、Cu、Hg、Ni、Pb和Zn的污染水平并进行对比分析,还利用正定因子矩阵模型(positive matrix factorization, PMF)进行土壤重金属溯源解析。结果表明:1)研究区土壤除Hg和Cr的均值低于兰州市和甘肃省土壤背景值之外,其余As、Cd、Cu、Ni、Pb和Zn的均值都高于二者的背景值,但所有元素的测定值均低于《土壤环境质量农用地土壤污染风险管控标准(试行)(GB 15 618-2018)》(pH值大于7.5)的筛选值。2)内梅罗综合污染指数和污染负荷指数分别处于0.71～2.02和0.64～1.48之间,均值为1.41和1.17,土壤总体上为轻度污染。改进物元可拓模型评价结果显示研究区土壤总体上处于尚清洁状态,与内梅罗综合污染指数与污染负荷指数评价结果基本一致,但改进物元可拓模型的评价结果更具有实际指导意...  相似文献   

变量筛选方法对郁闭度遥感估测模型的影响比较   总被引：2，自引：0，他引：2  

琚存勇  邸雪颖  蔡体久 《林业科学》2007,43(12):33-38

比较基于偏最小二乘回归的Bootstrap方法与传统的平均残差平方和(RMSq)准则所选变量建立模型的精度差别.结果表明:Bootstrap方法是一种更优秀的变量筛选方法,比RMSq方法精度提高约5%;而且它不受变量多带来的运算困难的限制,更便于实际应用.  相似文献   

Research Progress on Speciation of Selenium Compounds in Plants     

Cheng Jianzhong  Yang Ping  Gui Renyi 《中国林业科技(英文版)》2012,(3):83-83

All factors affecting the PCR system in Pinus massoniana Lamb were investigated one by one.The results show that the optimum PCR system of EST-SSR were:2μL 10×Buffer(Mg²⁺ Free), 30 ng template DNA,0.187 5 mmol/L dNTPs, 3.75 mmol/L Mg²⁺,8 pmol primer pair,1.0 U Taq DNA poly-merase in total 20μL reaction system. Finally,a total of 11 isolates of P.massoniana was used for testing the stability of the PCR amplification.The results prove that the optimum PCR system was stable,reliable,highly repetitive.  相似文献   

Rocky Desertification Dynamic Analysis and the Development of Management Information System   总被引：6，自引：0，他引：6  

YAN Xue-li  XIE Shi-you College of Geographical Science  Southwest University  Chongqing 《（《农业科学与技术》）编辑部》2008,(2)

With the background of severe rocky desertification in the west of China and the objective of ecological environment construction and poverty elimination,the management information system of rocky desertification was designed according to the natural and humane characteristics in Nanchuan of Sichuan Province. The system was composed of data management module,information query module for rocky desertification,spatial analysis module and dynamic monitoring module.  相似文献