查询词典 information retrieval

50 Is a standard network protocol of information retrieval, especially used in the fieldof online bibliographic retrieval.

9.50是网络信息检索的标准协议，目前主要应用于联机书目检索领域。

In this paper,the design and the implementation of a rule induction based IE system is presented for automating Web information retrieval by DOM parsing and rules for retrieval,extraction and mapping.

通过文档对象模型解析以及检索、抽取、映射等规则的定义，设计并实现了一种具有规则归纳能力的信息抽取系统，用于Web信息的自动检索。

In information retrieval,relevance feedback is an effective way to improve retrieval performance.

在信息检索领域，相关反馈是提高检索性能的有效方法之一。

Latent semantic index LSIis a new algebraic model for information retrieval, which maps documents and queries vectors into a lower dimensional space by singular value decomposition, so that the inherent vagueness associated with a retrieval process based on keyword sets is considerably reduced and semantic association among the documents is highlighted consequently.

隐含语义索引是一种新型的信息检索模型，它通过奇异值分解，将词向量和文档向量投影到一个低雏空间，消减了词和文档之间的语义模糊度，使得文档之间的语义关系更为明晰。

Essentially, this paper shows that the findability"s degree of network information resource and the satisfaction of user"s information need are two sides of one contradiction. The key of resolving the problem is not only the traditional information organization facing the network information resource itself but also needing the intelligence workers to consider users and the interactive between "World III" and "World II" more. The form of interactive is the information retrieval behavior of network users.

笔者指出：网络信息资源的可检索性程度和用户信息需求的满足本质上是一个问题的两个方面，而解决问题的关键不只在于面向网络信息资源本身的传统信息组织工作，更多地在于&世界三&与&世界二&之间的互动，而互动的形式就是网络用户的信息检索行为。

In essentially, ontology is the des cription of the relationships between objective concepts, so the information retrieval technology based on ontology provides knowledge and semantic matching, also, it makes up the bug, and it will be more round and precision than the traditional retrieval technology that based on keywords and database.

本体是对客观概念和概念之间关系的规范和描述，因此基于本体的信息服务检索是基于知识的、语义上的检索，它弥补了传统的基于关键字的检索技术的缺陷，从而在查准率和查全率上有更好的保证。

With library digitalizing process moving forward continuously, digital library will be not only a information retrieval and service system based on digitalization resource or resource system, but also a kind of the development mechanism to get together information resource, information service and information use campaign with user as core.

随着图书馆数字化进程的不断推进，数字图书馆将不仅是一个基于数字化资源的信息检索和服务系统或资源系统，而是一种以用户为核心来聚合信息资源、信息服务、信息利用活动的动态机制。

Since the concept-based retrieval is one of the most important ways of intellectualized information retrieval.

概念检索是实现智能信息检索的重要方式之一。

In this paper,a commodity information retrieval model is presented, which integrates semantic retrieval and multi-attribute decision method.

提出一种结合语义检索和多属性决策方法的商品信息检索模型。

In this paper, we propose an information retrieval method that tightly integrates description logic reasoning and traditional information retrieval technique.

如何准确表达用户意图，判断网页与用户需求的相关性是信息检索技术研究的重要方向。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。