再论Internet网上药学资源的利用

21世纪是一个信息化的时代,Internet的产生使信息资源共享成为现实。更重要的是Internet中包含着大量的最新医药资料,它在药学领域的各个方面都有极大的应用价值。文献[1]主要介绍了Internet的入门和初步利用网上药学资源的方法。现在笔者向广大药学工作者做进一步的介绍。1　重要的药学网址[2,3]1.1　主要的中文药学信息资源1)大学、研究所、图书馆等药学研究所设立的专业网站,如:中国生物医学文献数据库,http://www.imicams.ac.cn/cbm.html由中国医学科学医学信息所网站提供,可用免费帐号test检索更新数据库(即尚未采用光盘出版的文…     

Internet上煤炭信息资源的检索

一、了解与利用Ｉｎｔｅｒｎｅｔ上的搜索引擎Ｉｎｔｅｒｎｅｔ上的各种信息资源浩如烟海 ,要进行检索犹如大海捞针 ,只有按图索骥才能事半功倍。如何获得所关心内容的网页或网址尤为重要。在Ｉｎｔｅｒｎｅｔ上有许多搜索引擎 (ＳｅａｒｃｈＥｎｇｉｎｅｓ)供检索使用。表 1列出了一些有名的网上中、英文搜索引擎。ＡｌｔａＶｉｓｔａ网站不仅是最大的网站之一 ,还具有检索特殊语言文件的优点 ,可进行英语、德语、法语、意大利语、西班牙语和荷兰语简单文本文件的互译。Ｈｏｔｂｏｔ具有大量的检索词条。Ｙａｈｏｏ是最大最常用的检索工具 …     

我国药品标准管理文献计量学分析

目的深入了解我国关于药品标准管理的研究进展与实际应用。方法通过中文期刊全文数据库（CNKI）与中文科技期刊数据库（VIP）检索出的相关文献．对文献的时间分布、期刊分布、机构来源分布及文献涉及的内容分布等方面进行研究，并就我国的药品标准管理现状进行归纳与分析。结论我国药品标准管理的研究尚存在一些空白。药品标准管理体系建设亟待发展与完善。     

《水利水电技术标准全文检索系统》的内容及特点

本文对2000版《水利水电技术标准全文检索系统》的内容、系统特点、系统结构、全文库的特征字段设置及系统运行环境作了介绍。     

浅谈城市信息化建设对B2C的推动

现在的电子商务直接与广大消费者相关的一种模式是“ＢｔｏＣ”模式（ＢｂｕｓｉｎｅｓｓＣｃｕｓｔｏｍｅｒ，即商家对顾客，以下简写为“Ｂ２Ｃ”）。Ｂ２Ｃ的出现，引发了一场购物方式的革命，用户只需上网，检索自己所需的商品，选中后，通过在线支付，便可以舒心地在家中等待商家以最快的速度把商品送到自己手中了。据统计，在我国的商务网站中，以网上购物类为数最多（１５００家以上），占商务网站总数的６０％左右，而在这类Ｂ２Ｃ网站中又分为综合类网上购物商城和专销某类产品的网上专卖店。目前网上商店所销售的商品种类集…     

企业动态网站的开发

传统的静态网页已满足不了当前网站的需求，动态网站技术成为目前最热门的话题。介绍了动态网站的概念及技术，论述了如何利用动态网站技术ASP和动态数据库开发出企业网站的产品查询、网上订购、用户留言本以及企业内部信息提交系统等模块．以实现网站和客户的动态交互的功能。     

利用高科技创新服务模式,让企业享用“指尖上”的招投标——丹阳市公共资源交易中心开通微信平台

正近日,丹阳市公共资源交易中心开通了招投标微信平台与招投标手机版网站,提供"指尖上"的服务,以信息手段打通服务企业的"最后一公里"。该微信平台是由中心信息部自主研发,同时整合了中心手机版网站,实现了中心网站、手机版网站、微信公众服务号的有机统一(三个平台内容同步更新;自动跳转到相应的方式,电脑访问网站、手机访问手机版网站,微信可发送关键字得到相应回复)。目前该平台微信端共设置有"招标信息"、"重要通知"和"咨询投诉"等三个栏目。其中,     

中国包装信息网已开通

中国包装信息网本着“信息全面、查询简捷、方便企业”的原则确定了“热点新闻、企业大全、供求信息、市场行情、相关网站、国外组织、反馈表、分类广告”等栏目，基本复盖了包装行业企业所关心的热点问题。热点新闻：主要提供与包装行业相关的新闻，力争做到及时、准确、全面。企业大全：按纸、塑料、金属、机械、陶瓷玻璃、研究机构等分为六大类、几十个小项，包含了全国几万家企业，检索方式简便快捷。供求信息：由企业远程登陆，直接上网发布信息不受时间地域限制，任何企业均为在网上发布本企业的供求意向。市场行情：提供包装企业所需…     

企业标准检索软件的研制

介绍了“企业标准检索软件”的结构、工作流程及其功能等,阐述了该软件可对企业标准全面、准确、快速检索,并可实现人工检索所不能实现的多途径、系列检索等功能.     

有关化学品中毒急救的网上信息源

根据国际惯例 ,“物质安全数据卡”是每一种化工产品必须具有的技术文件 ,对于化工产品的研究、开发、生产、经营 ,尤其是对于化学品中毒的紧急救治等 ,有重要的参考价值。此类文件有其特定的格式和内容 ,通常包括 1 0部分信息 ;有其丰富的网上来源 ,其检索方法也有一定程度的特殊性。本文详细介绍了上述内容 ,以便使这种全文本、免费的网上信息资源能够得到充分、有效的利用。     

Understanding corporate B2B web sites' effectiveness from North American and European perspective

The globalization of economic activities has led multinational business-to-business (B2B) firms to use their corporate web sites extensively to communicate with their stakeholders. Using a field study of 368 business customers, this paper examines three factors of information that influence corporate web sites' effectiveness in a B2B context and whether these factors differ by web site user's national origin. Results indicate that informativeness of a corporate web site is important for both North American and European visitors. Quality of information is important for European users but not an important aspect for North American users. Usability is the most important factor for North American users but it is not important for European users. Implications of these results are discussed for managerial practices and further research.     

Revisions in Repeat-Sales Price Indexes: Here Today,Gone Tomorrow?

Price indexes based on the repeat-sales model are revised all the way to the beginning of the sample every time a new quarter of information becomes available. Revisions can adversely affect practitioners. In this paper we examine this revision process both theoretically and empirically. The theory behind the repeat-sales method says that revisions should lower the standard error of the estimated indexes; we prove that, in fact, the revised index is more efficient than the original one. This implies that large samples should make revisions trivial. However, our data, and the Freddie-Fannie data, suggest that revisions are large, insensitive to sample size and systematic; revisions are more likely to be downward than upward. In Los Angeles and Fairfax, revisions are usually downward and statistically significant. This bias in initial repeat-sales estimates is caused by sample selectivity; properties with only one or two years between sales do not appreciate at the same rate as other properties. We hypothesize that these "flips" are improved (possibly cosmetically) between sales. One implication of our analysis is that flips should be removed or downweighted before calculating repeat-sales indexes. The same model estimated without flips appears free of bias. We find small increases in efficiency from adding up to 4,300 observations to a base of 1,200.     

WHEN DO CONSUMERS SEARCH?*

This paper provides empirical evidence relating search to price movements. We measure consumer search directly from traffic statistics for web sites that report gasoline prices. We show empirically that consumers search more as prices rise than they do when prices fall. Asymmetric search patterns have consequences for price behavior. Our findings indicate that retail margins are squeezed by increased search. In addition, we show that there is more price dispersion when prices are falling than when prices are either stable or rising. Our results provide a search‐based explanation for the ‘rockets and feathers’ phenomenon of asymmetric price adjustment.     

利用DOM及DEM数据进行输电工程勘测设计研究

依据山东省地理信息中心已有1／10000比例尺的DOM（数字正射影像图,Digital Orthophoto Map）和DEM（数字高程模型,Digital Elevation Model）数据,通过核线共线方程恢复生成大场景三维立体模型,然后进行架空输电线路路径优选、测量平断面图,再进行外业采集交叉跨越和重要断面数据,并用外业实际测量数据对原数据进行拟合修正,最后生成三维漫游。研究将标准测量4D数据应用到架空输电工程勘测设计全过程,通过工程实际应用,提出了应用方法及注意事项等。     

Search algorithm,repetitive information,and sales on online platforms

A prominent feature of online sales is that buyers rely on the search tools offered by platforms to process information when searching for products. We develop a model that captures how the search algorithm affects buyers’ search processes, which further influences market equilibrium and welfare. If a platform adopts a highly unequal search algorithm, buyers are likely to obtain repetitive information about a small group of sellers, which causes buyers to consider fewer options and suppresses competition. By using data from food delivery platforms, we provide empirical evidence that markets with less equal distributions of store rankings in search results have higher average prices and more concentrated sales. We suggest that regulators should restrict search algorithms from showing repetitive information.     

中国地区工业竞争力评价

工业竞争力是近年来学术界研究的一个重要领域。本文在对现有研究成果进行间要回顾的基础上，提出了一个衡量地区工业竞争力的基本理论框架，即地区工业竞争力是由市场影响力、工业增长力、资源配置力、结构转换力和工业创新力有机构成的综合体。根据这一基本理论框架，我们设计了一个简便的测度地区工业竞争力的综合评价指标体系，并据此对当前我国各地区的工业竞争力状况进行了初步评价，提出了增强地区工业竞争力的政策建议。     

Fortune 500 manufacturer web sites: Innovative marketing strategies or cyberbrochures?

Forecasts for business-to-business electronic commerce over the next few years are in the trillions. Manufacturers represent a significant portion of business-to-business activity and their web sites an integral component of business-to-business electronic commerce. Should they choose to, manufacturers can use their web sites not only to conduct electronic commerce but also to engage in a wide range of marketing communications. Marketing communication activities include advertising, sales promotion, public relations, and direct marketing. The results of our content analysis of 188 Fortune 500 manufacturer web sites indicated that few manufacturers use a broad range of marketing communications activities. Analysis of differences in the use of marketing communications on web sites suggests that some aspects of web site marketing communications differ based on manufacturer characteristics such as sales, R&D to sales ratio, and net income.     

A Model of Localized Mortgage Lending Behavior*

Loan administration costs and the costs of search for information about risk are found to be determinants of spatial interest rate differentials. These costs are independent of dollar loan size; therefore, rational lending policies can produce higher interest rates (or lower term to maturity) in low-income communities. But the premium (lower maturity) should be related to lower loan size and risk differentials. Public policy should be directed toward compiling and verifying an information bank which would allow lenders to search efficiently for information about risk. An empirical methodology designed to test for mortgage deficiency in minority areas was developed through case studies. This indicated the utility of specifying the supply and demand for mortgages at the neighborhood level of aggregation. Trends in neighborhood property values were identified as important and overlooked measures of lending risk. Further exploration of the hypothesis that Spanish-speaking areas are mortgage deficient is suggested by the cases.     

Biases in demand analysis due to variation in retail distribution

Aggregate demand models typically assume that consumers choose between all available products. Since consumers may be unwilling to search across every store in a given market for a particular item, this assumption is problematic when product assortments vary across stores. Using supermarket scanner data for five product categories we demonstrate that approximately one third of products have limited retail distribution, which account for one fourth of dollar sales. Monte Carlo analysis demonstrates that the level of limited product availability observed in the data can significantly bias the results of aggregate demand models that incorrectly assume all consumers in a given market face the same choice set.     

对制定产品标准中一些问题的探讨

针对在制定产品标准中存在的一些问题,提出产品标准已不仅是作为组织生产的依据,企业不必为他人制定产品标准;行业在制定特定型号的产品标准时应该谨慎行事;产品标准中净含量的标注不能一概而论等四个论点.并就其进行了论述和探讨.