渔业科学数据智能RSS阅读器的设计研究

针对传统RSS阅读器在实际应用中接收大量冗余信息的问题,提出一种智能化的RSS阅读器。该阅读器基于渔业科学数据平台,采用向量空间模型,运用中文分词、对象持久化等技术实现智能原理,设计实现了智能化RSS阅读器。实验证明：该阅读器的过滤有效性为86.2%,过滤准确性为82.4%,能够较好地过滤掉与用户不相关的信息。应用结果表明：渔业科学数据智能RSS阅读器的实现可使用户获得更精准的信息。     

酵母铬对围产后期奶牛抗氧化能力的影响

选用20头胎次相近和分娩期相近的中国荷斯坦奶牛,随机分为4组,对照组为基础日粮,3个处理组在基础日粮中分别添加3．0、6．0和9．0g／a的酵母铬。试验期为2周,从分娩当天持续到产后14d。结果表明,（1）与对照组相比,添加酵母铬可以提高血清中总抗氧化能力（T—AOC）,超氧化物歧化酶（SOD）和谷胱苷肽过氧化物酶（GSHPx）的活力（P〈0．01）,降低丙二醛的浓度;（2）酵母铬降低了皮质醇含量,提高了胰岛素活性。本试验条件下,发现基础日粮添加9．0g／d的酵母铬,使铬添加水平为0．8mgCr／kg时,效果较好。为研究在日粮中添加不同水平的酵母铬对围产后期奶牛抗氧化性能的影响提供依据。     

Recent Advances in Molecular Biological Applications in Sri Lankan Tea （Camellia sinensis） Industry： An Overview on the Achievements During Last Ten Years

For tea,which is predominantly out-breeding woody perennial,genetic improvement through conventional approaches is relatively ineffective,slow and costly.As a potential tool to enhance the process,Tea Research Institute of Sri Lanka （TRISL） has integrated molecular biology to supplement the conventional program and is in progress.To date,a considerable progress has been achieved in the key areas such as genetic characterization and estimation of genetic diversity,isolation and characterization of EST and genomic SSRs,construction of SSR primers,construction of genetic maps and marker assisted selection and application of genomic approaches to understand the role of secondary metabolites disease resistance in tea and in this paper,a summarized version of above studies is presented.     

Tea Art Education for Elementary School Students in Hangzhou City of Zhejiang Province in China——A Case of Caihe Second Elementary School

Caihe Second Elementary School,a public school in Hangzhou city of Zhejiang province in China,has shown excellent performance at practicing tea art education for students as a part of after-school activities it encourages.In this paper,the author figured out significance of tea art in Chinese society by discussing ＂why elementary students learn Chinese tea art＂ through observation on tea art education at Caihe Second Elementary School and interview with persons involved.     

Discussion and Evaluation of How ＂Tea Culture＂ is Defined

The essence of tea culture stems from the meeting of tea＇s inherent morality,its roots in nature,and human cultural activity.Because it is intertwined with traditional philosophy,Chinese tea culture is well-established and flourishing.The definitions and delineations of tea culture are varied,but any definition should reflect tea culture＇s relativity in space and time and human-centered nature,especially the spiritual needs of humans.     

Further studies on feline respiratory virus diseases

Extract

The July 1973 issue of the New Zealand Journal of Agriculture discussed the Tama revolution. No mention was made of the possibility of nitrite poisoning in cattle grazing ‘Grasslands Tama’ (tetraploid westerwolds) ryegrass. There have been deaths from nitrite poisoning in cattle grazing Tama ryegrass and other crops in many districts this year, and this experience with a brief discussion on nitrite/nitrate poisoning is presented for the guidance of those who may be considering Tama ryegrass as a fodder crop.     

新型职业农民培育创新机制探究

在农村劳动力流失的背景下,农民培训体系缺乏合理规范与科学设置、市场发展非均 衡化等问题严重制约着新型农民培育机制的形成与发展。因此积极建立并健全农村培训机制, 能够有效推动我国农民培训事业的快速发展。本文结合农民培育机制的重要性,探析农民培育 的现状,提出相应的创新路径。     

基于自主导航和全方位转向的农用机器人设计

为了提高农业作业的自动化程度,在对传感器技术、信息技术、自动导航技术等进行研究的基础上,设计了一种自动导航农用轮式移动机器人.针对目前农业机器人存在的操纵、路径跟踪等技术问题,机器人采用四轮全方位转向,操纵灵活;利用CAN总线使导航、控制等模块的通讯效率得以改善;选用模糊控制模仿人在路径跟踪控制时的控制策略,提高了移动机器人的智能化程度.仿真和试验表明机器人有较好的转向性能且在速度为1 m/s时跟踪路径的偏差为0.1 m左右.     

白榆种源的地理变异和基因型稳定性

本文报道了在14个试验点所作46个种源的地理变异和生态稳定性研究结果。发现我国白榆种源间存在着极大的异质性。生长力随纬度方向呈渐变模式,分布区南部黄淮流域的种源生长快,分布区北部各种源生长慢。试验点生境的优劣,对白榆生长影响很大,并存在有一定的种源×地点的交互作用。因此,根据多点的综合分析,提出了各种源的生产力和生态稳定性参数,为各造林地区选用适宜种源提供了依据。