基于Gabor滤波与Tamura纹理特征的板材分类研究

板材表面的纹理特征是木质板材表面最为直观的特性,同时也是建筑装潢质量和木制品品质的重要评价指标。以中国东北部常见的红松、落叶松、白桦、水曲柳和柞木等5种树种的弦切、径切图像作为研究对象,提出一种基于多通道Gabor滤波和Tamura纹理特征的板材纹理特征提取方法,克服了传统方法在提取样本图像的全局特征时对局部纹理特征不敏感的问题。具体是将基于视觉心理学的Tamura纹理特征与Gabor滤波器进行结合,在不同频率、不同方向上共24组滤波器的虚部卷积图像上进行纹理特征参数提取,结合上述的纹理特征参数在BP神经网络、KNN和支持向量机分类器上进行分类试验,最佳特征参数体系的识别率达97.8%。     

农业无税 农民如何种田

随着农业税减免步伐的进一步加快，全国各地的农民对土地的耕种，由过去的厌耕、弃耕，迅速转变为精耕、抢耕，种田热在全国各地迅速兴起，但如何种田，不少农民很茫然。本刊编辑部策划本组报造就农民如何种田、新形势下政府如何指导农业生产、农业科技人员在农民种田中所起的作用等方面进行探讨，虽然不能面面俱到，但具有一定的借鉴和参考价值，希望各级政府及广大农民能从这组报道中受到启迪。     

⒆芟叩娜砑逑到峁狗

占际醯玫搅私峡斓姆⒄?超高速FOY的工业化生产速度已近8000rn/dn,各种一步法FDY工艺技术不断得到开发和应用,工艺技术随着高速卷绕机技术的发展不断得到完善。POY—DTY工艺在新尤?,骚动不安、食欲不振 ,让主人十分心痛。 2 0 0 0年 7月以来 ,我们对 14 7条患皮肤病的宠物犬实     

沉痛悼念我国果树学家李育农教授

我国著名果树学家,中国共产党员,西南大学李育农教授于2006年1月22日22时50分在重庆北碚因病逝世,享年86岁。李育农,曾用名李学应,男,汉族,1921年11月17日出生于云南省昭通市,1942年毕业于国立浙江大学农学院园艺系,1947年加入中国共产党,1953年从云南大学调至西南农学院任教,1     

The ECVP/ESVP summer school in veterinary pathology: high-standard, structured training for young veterinary pathologists

This article describes the ECVP/ESVP Summer School in Veterinary Pathology, a new annual two-week European training facility established by the European College of Veterinary Pathologists (ECVP) in collaboration with the European Society of Veterinary Pathology (ESVP). The aim of the Summer Schools is to provide Europe-wide, harmonized, top-standard theoretical and practical post-graduate training for veterinarians specializing in veterinary pathology. In particular, it aims to support trainees in veterinary pathology in their individual preparation for the ECVP certifying examination. Ultimately, it aims to provide young pathologists with the skills and knowledge necessary to participate in international, high-quality research and the tools for applying international standards to their own research and for independent study for the ECVP certifying examination, even if they do not work in comparable academic environments and do not have the same level of local support and training. The ECVP/ESVP Summer Schools take place in European countries, with local organization from a university department of veterinary pathology. Each event comprises modules provided by internationally recognized specialists in their specific fields of expertise on different organ systems, diseases of specific species, specific techniques, and specific topics relevant to pathology, forming a cycle of four events to cover all major topics. Every two years a mock exam is organized as a tool to monitor individual progress in preparing for the ECVP certifying examination.     

AAHA/AAFP pain management guidelines for dogs and cats

Pain management in dogs and cats has undergone a dramatic evolution in the past decade. Current approaches focus on anticipation and prevention of pain, as well as both pharmacologic and non-pharmacologic management techniques. The veterinary team plays an essential role in educating pet owners about recognizing and managing pain in their pets.