人体尿液中黄蝶呤水平检测及其意义

目的：探讨尿黄蝶吟与癌症的关系及临床意义．方法：采用荧光光度结合纸层析法测定了29例健康人、11例普通病人、23例癌症病人的尿黄蝶呤水平。结果：癌症患者尿黄蝶呤含量明显高于健康人。普通病人与健康人的尿黄蝶呤水平相差不大,健康组中老年人的尿黄蝶呤含量高于年轻人。淋巴瘤、肝癌、胃癌患者尿黄蝶呤水平较高．结论：尿黄蝶呤的含量与人的年龄大小有关。黄蝶呤有可能作为淋巴瘤、肝癌和胃癌等癌症的肿瘤标志物。     

涂装-体化技术在生产中的应用研究

传统喷涂工艺中没有中涂喷漆线,而需要采用在面漆线转两圈的工艺对有特殊要求的驾驶室进行中涂、面漆喷涂,耗时、耗能,不仅降低涂装喷漆线产能,还会加剧产能与市场需求的矛盾.本研究根据汽车厂原有工艺条件开发出驾驶室中涂、套色、涂胶一体化工艺技术,系统介绍了一体化技术开发背景、工艺技术流程以及技术应用情况.新工艺对原生产线进行重...     

利用RBI技术及EDIS系统提升海上平台检测水平的方法

一、海上平台检测业务现状 近年我国近诲油田急速发展,海上平台处在严酷的海洋环境中。海上设施的老化、机械使用年限的延长以及构件腐蚀、连续运转等因素,给生命和财产安全带来了危害。海油发展油建公司检测中心是接受油公司委托,开展海上平台检测的专业服务单位。     

大米中11种有机氯农药残留量的同时测定

用气相色谱一电子捕获检测器法 ,对我省出口大米中 1 1种有机氯农药残留量进行了测定。样品用丙酮 乙腈 ( 3 :7)混合液进行提取 ,弗罗里硅土净化 ,以DB -1 70 1毛细管柱作为分离柱 ,能有效分离 1 1种有机氯农药 ,并能去除大米基质的干扰。该法在 0 .0 0 5～ 0 .2mg/kg具有良好的线性 ,检出限为 0 .0 0 5mg/kg ,在对我省出口大米有机氯农残检测中 ,获得了较为满意的结果。     

北极太平洋扇区深海沉积物的细菌多样性研究

对北极太平洋扇区4个站位深海表层沉积物样品,采用PCR结合变性梯度凝胶电泳(PCR-DGGE)技术进行了细菌16S rRNA基因V3区序列的系统发育分析.结果表明,沉积物中的细菌多样性丰富,获得的40条序列归属于4个细菌类群:变形细菌(Proteobacteria,占全部序列的75%)、噬纤维菌-屈挠杆菌-拟杆菌群(Cytophaga-Flexibacter-Bacteroides,CFB,占10%)、放线细菌(Actinobacteria,占10%)和酸杆菌(Acidobacteria,占5%).其中变形细菌(包括α、β、γ和δ-Proteobacteria),而γ-Proteobacteria占全部序列的62.5%,是很明显的优势类群.在这些细菌类群中,β、γ-Proteobacteria在4个站位沉积物中均有分布.     

快速查找共享文件夹的真实路径

共享文件夹设置起来很方便，有时候时间久了，自己都忘了把那些文件夹共享，要想取消共享文夹反而麻烦了，下面笔者介绍两个简单的方法，可以快速查看共享文件夹的真实路径。     

Effective and Efficient Multi-Facet Web Image Annotation

The vast amount of images available on the Web request for an effective and efficient search service to help users find relevant images.The prevalent way is to provide a keyword interface for users to submit queries.However,the amount of images without any tags or annotations are beyond the reach of manual efforts.To overcome this,automatic image annotation techniques emerge,which are generally a process of selecting a suitable set of tags for a given image without user intervention.However,there are three main challenges with respect to Web-scale image annotation:scalability,noiseresistance and diversity.Scalability has a twofold meaning:first an automatic image annotation system should be scalable with respect to billions of images on the Web;second it should be able to automatically identify several relevant tags among a huge tag set for a given image within seconds or even faster.Noise-resistance means that the system should be robust enough against typos and ambiguous terms used in tags.Diversity represents that image content may include both scenes and objects,which are further described by multiple different image features constituting different facets in annotation.In this paper,we propose a unified framework to tackle the above three challenges for automatic Web image annotation.It mainly involves two components:tag candidate retrieval and multi-facet annotation.In the former content-based indexing and concept-based codebook are leveraged to solve scalability and noise-resistance issues.In the latter the joint feature map has been designed to describe different facets of tags in annotations and the relations between these facets.Tag graph is adopted to represent tags in the entire annotation and the structured learning technique is employed to construct a learning model on top of the tag graph based on the generated joint feature map.Millions of images from Flickr are used in our evaluation.Experimental results show that we have achieved 33% performance improvements compared with those single facet approaches in terms of three metrics:precision,recall and F1 score.     

寻·信息时代的必修课——桌面搜索·7项指标大比拼

随着大家的硬盘越来越大，文件也越存越多，而且很多人都没有分门别类整理硬盘的习惯，时间一长就忘了自己把某个文件都在哪了，虽然个人电脑上的资料不如互联网那样海量，但是Windows自带的搜索功能查找速度太慢，     

让电脑插上手机的翅膀 M2P个人信息中心

大家想想看如果手机能和电脑随时随地的连接在一起那会怎么样呢?用手机遥控电脑、把手机的精彩短信随时随地的保存到电脑中、让电脯自动回复手机的短信……这些以前很难想象的事现在部在一个软件的帮助下成为了可能,它就是M2P个人信息中心(Mobile to PC,手机到个人电脑)。     

设置改一改，QQ连接更顺畅

内网用户用QQ进行语音聊天或者文件传输时会遇到不少困难，虽然新版的QQ在这方面有了些改进，较少出现以前那种。对不起，您和对方处于不同防火墙后或者有一方使用TCP／HTTP登录QQ，双方都不是会员，无法建立连接”的情况了，一般可以连接上，不过速度差别很大，2003以上版的QQ在建立连接时都会显示出连接方式，一般有以下四种。