致仔猪水肿病大肠杆菌的分离鉴定及耐药性分析

从疑似仔猪水肿病病料中通过细菌分离、生理生化试验、动物试验和PCR试验,分离到了10株致仔猪水肿病的大肠杆菌.利用药物敏感性试验,对分离的10株大肠杆菌进行了耐药性检测,结果表明：10株大肠杆菌对2种抗生素都耐药,且许多菌株有多重耐药现象.     

Optimal design on wideband directional coupler

Combining the modified Bethe small holes coupling theory with McDonald thickness theory and field averaging correction factor, it is accurate to design the weak coupling waveguide directional coupler. While the coupling is tight, the decrease of the field strength in the main waveguide caused by aperture should not be neglected. For a −6 dB directional coupler is described in this article, the theoretical value of coupling is good agree to the simulation value, by simulated and optimized with the professional software computer simulation technology (CST). In the designed waveband, the error of coupling between theoretical value and simulating one is less than 0.25 dB. The error of coupling between simulation value and designed value is less than 0.5 dB. To improve the isolation, some spaces between two adjacent holes are turned from the traditional ? centre guided wavelength. The performance of isolation has 5 dB improvement, and length of the coupling area is only 51.06 mm.     

高职学前教育专业舞蹈分层教学的实践

舞蹈是理论与实践紧密相连,操作性极强的艺术课程,也是高职学前教育专业的一门专业课程。目前高职学前教育专业生源分别来自于职高和普高,学生的舞蹈基础差异较大。为了将舞蹈教学的目标真正落到实处,应当实行分层教学,按不同的教学对象,选择不同的教学内容和方法,制定新的考核标准。     

混凝土结构的劣化分析与控制

结构混凝土的劣化常常导致结构过早地进行维修或拆除,甚至发生严重事故.有些基层结构设计工程师在设计中往往仅考虑结构的受力状态及变形程度,而对混凝土随时间和环境变化产生性能劣化的认识不清,重视不够.从混凝土自身形成过程、混凝土状态特点与环境因素间相互作用方面,定性分析了其内部损伤发展的各个阶段及影响机理,并结合多年在污水处理工程上的设计经验及有关规范要求,在工程设计、施工管理及使用维护方面提出一些控制措施,以利于建筑物、构筑物使用寿命的提高.     

云计算环境下应用层DDOS攻击特点及防范研究

本文研究云计算环境下应用层DDOS攻击特点及其对应的防御方法,文章先对应用层DDOS攻击的分类和特点做了相关分析．对正常用户访问和应用层DDOS攻击的行为特征进行比较分析。对应用层DDOS攻击依据特点进行分类并设计相应的检测算法．分多种类多阶段对其进行检测．设计相关实验,实验表明算法可以较好的发现和防御应用层DDOS攻击的发生．     

“But I just want a book!” Is your discovery layer meeting your users’ needs?

Abstract

In January 2016, the University of Toledo Libraries implemented EBSCO Discovery Services (EDS) as its discovery layer. Administrators questioned whether users were able to find consortial material in the EDS, so they assembled a task force to conduct a pilot usability test. The task force gathered demographic data and recorded the screens of 25 students answering six task questions. Results showed participants could easily find most items except books, and for tasks that were open-ended, many students continued searching even though they found relevant material. To determine why participants could not find books, the task force consulted with EBSCO and discovered a configuration problem that was easily resolved by editing a mapping table and adding a custom limiter for print books. The searching issue was more difficult to determine, and the task force suggests a lack of library instruction may be at least partly to blame. Libraries invest significant resources in discovery layers. If users have difficulty using them or finding relevant material for their assignments, libraries need to address that issue and instruction is one solution. This pilot study reports on what the University Libraries did to make the EDS more usable for its users.     

论《我弥留之际》中本得仑家庭的解体

《我弥留之际》是威廉.福克纳最优秀的作品之一。自出版以来,评论家们一直从不同的角度来解读它。该故事首先是一部家庭小说。在细读文本的基础上,透过文化研究和女性主义等视角研究本得伦家庭的解体,得出亲人之间相互孤立、家庭中心的缺失和家庭成员的精神危机是本得仑家庭解体的根源。通过本得伦家,福克纳旨在反映普遍的人类关系并探讨处在现代社会中的人类的普遍危机。     

罗伯特·弗罗斯特：一个孤独的诗人

二十世纪美国著名诗人罗伯特·弗罗斯特的诗歌看似简单明了,充满田园风光,其实饱蘸孤独。这孤独缘于他生活的动荡年代,缘于他居住的荒芜地区（新英格兰地区）,更缘于他人生的厄运以及他对人生的感悟。隐喻及其它写作技巧的综合运用构成了“暗隐的孤独的快乐”。     

土壤放线菌分离纯化实验的研究

通过精品实验项目"细菌纯种分离和培养"的实施,在环境专业本科生中开展了土壤放线菌的分离、纯化实验。在老师的带领下,学生从崇明岛采集了土壤样品,利用浇注平板法、划线分离法对土壤中的放线菌进行分离、纯化并得到其纯菌。由16S rDNA序列分析结果初步判断:该放线菌为灰黄链霉菌。通过实验中的学习,学生亲身体会了野外采样的过程,锻炼了学生的实践动手能力,激发了学生的学习热情,加深了学生对微生物基础理论知识的理解,促进了学生创新思维和创新能力培养和提高。