摘要：资源发现是P2P应用所面临的最核心问题之一.无结构P2P方面的已有工作主要采用了查询消息泛洪和信息索引机制,这会造成严重的网络带宽负担以及巨大的索引维护开销.提出了一种无结构P2P环境下能够节约带宽、易维护的自适应搜索算法,即***根据用户的访问历史抽取用户的兴趣属性,并遵循用户的访问行为模式,以自发的方式组织基于用户兴趣属性的应用层smallWorld覆盖网络,然后基于覆盖网络实现了高效的文件定位.分析了影响搜索性能的关键因素,针对small World网络特点分别设计了基于兴趣度、基于本体距离和基于兴趣宽度等有效的查询消息转发策略.最后实验显示,SWAPS以其高成功率、低带宽消耗和很小的响应时间能够显著的提高搜索性能,而且对用户的访问行为体现出良好适应性.

摘要：In view of the current situation of the residential environment in small towns,some methods of ecological compensation design were discussed,such as the improvement of planting quality,the selection of suitable tree species,reasonable construction and management methods,expansion of space and so ***,some rational suggestions were put forward on strengthening the ecological and cultural construction of residential areas and enhancing residents' awareness of environmental protection.

摘要：本文将介绍CAN总线节点的设计以及在实时操作系统small RTOS51下CAN总线的数据接收与发送原理。读者通过阅读本文可以了解一个CAN节点的设计过程,CAN总线接口驱动程序的编写以及实时操作系统small RTOS51简单应用。

摘要：Based on the introduction of style feature and small towns' characteristics,problems existing in small towns' style features in China have been analyzed by taking style planning of Zhangwang Town as an example,and how to perform style features of small towns has been *** considers that small town's feature spatial layout should be well-proportioned,stepped,and closely linked with natural ***,the construction of feature perception system has been analyzed in the perspective of point,line and ***,the construction form of characteristic space and neighborhood space has been *** manages to find an operable way of thinking for town's style construction,so as to enrich regional feature.

摘要：本研究利用small RNA深度测序对长沙、永州、邵阳等地采集的甘薯种质资源病毒症状样品进行鉴定,发现样品中含有与甘薯曲叶病毒同源的系列。设计引物进行PCR扩增,鉴定出24个SPLCV-AC1基因片段序列,经NCBI-Blast比对,与10个不同株系SPLCV同源性达96%以上。为进一步获得SPLCV全长序列,设计背靠背引物,经PCR扩增、鉴定,获得3个SPLCV全长序列。系列进化分析显示,这3个SPLCV分离物聚为同一分支,其中SPLCV(76)序列大小2 774 bp,与甘薯乔治亚曲叶病毒中国分离物、甘薯金脉病毒具有较高同源性;SPLCV(47)序列大小2 777 bp,与甘薯河南曲叶病毒分离物具有较高同源性;SPLCV(68)序列大小2 832 bp,与甘薯广西曲叶病毒分离物具有96%的同源性。以上同源系列与small RNA测序显示结果相一致。本研究结果为甘薯病毒病防控提供理论依据。

摘要：In this study, the overall planning of Ji Townlet in Jianshan Town, Tujia-Miao Autonomous Prefecture was analyzed. The landscape planning & design of small townlets combined with the natural environment, humanist resources and ethnic features in ethnic area were discussed.

摘要：small and medium-sized modular reactors normally are reactors whose power usually less than 300 MW,also,the primary circuit loop such as core,heat exchanger,pump are integrated in the pressure vessel,due to its integration and lower power,the small modular reactor could under the standardized assembly line production and then transported to the destination,in addition,because of the lower power and characteristic of LBE,the LBE cooled small fast reactor could realize natural circulation and then have inherent ***,the small fast reactor could get flexible application such as centralized heating,water desalination and power supply for remote area and marine or space *** view of those,small and medium-sized modular reactors have been a hot area of research these years.

摘要：Since the 21st century, the construction of small towns in Guangxi Zhuang Autonomous Region has been accelerated obviously and has already taken shape, but there are still some problems such as old towns not being well protected, new towns constructed in unified style, regional culture not being excavated and town features without characteristics. Thus, this paper analyzed some actual cases in Guangxi which are successful in designing the overall image of small towns, including Cendou Xincun, Xing'an County and Yangshuo Dongling, found that all constructions show rich elements of traditional houses, characteristics of local houses and distinctive cultures of folk houses, and concluded that tradition was the source to construct the features of small towns, innovation was the basis to develop small towns and culture was the core to sublimate the features of small towns. It was considered that traditional architectures could only be integrated with modern architectures by fully excavating cultural characteristics of regional architectures, combining with regional tourism industry and motivating local people to participate in reconstruction, to enhance local styles and national features, and create a beautiful, comfortable and harmonious living environment, so the overall regional styles and features of small towns can be represented and proceeded, comprehensive competitiveness and strong vitality can be given to those towns.

摘要：本文分别从系统功能、硬件结构和任务设计几个部分,介绍了以嵌入式操作系统small RTOS51为软件平台,开发设计的一种智能型、可视化、多功能的光电效应实验系统,并给出了一组实测数据。

摘要：介绍了以嵌入式操作系统small RTOS51为软件平台,开发设计的一种智能型、可视化、多功能的光电效应实验系统,并给出了一组实测数据.