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101.
负载型催化剂的浸渍制备涉及到大量的经验规律,这就使得其条件参数的选择成为一个比较复杂的不确定性问题,借助于专家系统方法可望解决此类问题。本文在单组分浸渍系统的基础上,形成了一个多组分浸渍制备的专家系统原型IACES—Ⅱ,该系统由Prolog和Fortran语言编码,具备处理数值和非数值信息的功能。在IACES-Ⅱ系统中,采用集总的方法将浸渍参数的优化选择问题分解为若干子问题,并采用“规则架+规则体”这种基本结构来形成知识库的整体结构。然后,通过基于目标的推理给出如下浸渍参数:(1)吸附形式,(2)离子形式,(3)浸渍体系稳定的pH值范围,(4)竞争吸附剂,(5)操作参数(初始浓度,载体用量和溶液体积之比,浸渍时间等)。 相似文献
102.
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104.
Jure Zupan 《Mikrochimica acta》1986,89(1-6):243-260
The main aspects of handling large amounts of complex information, in general, and spectroscopic data, in particular, are described and discussed. In the first part, the basic terms and procedures are defined and illustrated with examples from different spectrometries. The items such as the representation of complex data of different types, measurement — and information — pace, metrics of a multi-dimensional space, different types of transformations, information content of a given representation, the concept of a frame, the holistic and reductionistic aspect of information are explained in more detail.In the second part, the organization of complex data with the intention of forming an expert system is discussed. Emphasis is put on the clustering of data, on the criteria for clustering, and on the ways and means governing the formation of hierarchies of clusters and frames they represent. Furtheron, a model for an expert system (which is able to acquire new information, i. e. which is able to learn, and to use the acquired knowledge for predicting the structural features of unknown compounds) based on the hierarchical organization of a large amount of data is outlined.Finally, the prospects and limitations of expert systems based on the hierarchical clustering of large data collections are discussed. 相似文献
105.
三好学生的模糊综合评选模型 总被引:11,自引:2,他引:9
通过分析目前三好学生评选中存在的不足之处 ,构建了三好学生综合评选指标体系 ,应用模糊综合评价理论建立了三好学生模糊综合评选模型 ,介绍了如何应用专家调查法来确定各指标的权重 . 相似文献
106.
计算统计是数理统计的一个重要分支,而统计专家系统是计算统计中一极热门的话题。本文简介了统计专家系统的概念及发展过程,并根据本人所作的工作介绍了统计专家系统的基本结构和构造过程等。最后对未来的统计专家系统提出了一点设想。 相似文献
107.
In this paper, we consider developmental lines of computer-assisted decision support (with consideration of knowledge-based approaches) for data analysis problems. First, we discuss some situations where it is obviously appropriate to apply computer-assisted decision support in connection with data analysis tasks. Then, a brief historical retrospect is given viewing the development of this area of research and its interfaces to knowledge-based approaches. Against this background we illustrate two prototypes of knowledge-based decision support systems for specific data-analysis problems related to fields of interest of our own. Finally, we indicate possible progress and future activities in this area. 相似文献
108.
Matthias Otto 《Mikrochimica acta》1987,91(1-6):445-453
Chemometric methods are described that provide effective means to enhance the information of analytical methods in material analysis and to enable knowledge engineering tools to be applied within the field. Typical applications are outlined for depth-profile analysis, for pattern recognition on ceramic systems as well as for the utilization of expert systems. 相似文献
109.
计算机辅助有机化合物结构解析ESESOC-Ⅱ 总被引:2,自引:0,他引:2
简要介绍了有机化合物结构自动解析专家系统ESESOC-Ⅱ及其结构产生器由分子式穷举生成有机化合物结构异构体的基本算法。主要讨论了结构产生器的穷举性、非冗性和有效性问题。 相似文献
110.
An Expert System for EPMA 总被引:2,自引:0,他引:2
Cécile Fournier Claude Merlet Pierre F. Staub Olivier Dugne 《Mikrochimica acta》2000,132(2-4):531-539
Experimental parameters for an electron microprobe are numerous and their choice influence the quality and accuracy of the
analysis results. The expert system intends to optimise the choice of every parameter as well as to automate the stages of
a quantitative analysis for all kinds of materials. In short, the expert system aims to master the accuracy of results and
to control the time of analysis.
The starting point of the expert system is an interactive questionnaire about the sample and about the expectations of the
analysis (the accuracy of the result and/or the duration of the analysis). Then, the expert system makes a semi-quantitative
analysis on the sample. It gives the sample composition in a first approximation. This is necessary for the expert system
to optimise all the parameters for an accurate quantitative analysis. Each parameter is modelled by a specific algorithm.
The expert system selects the parameters by minimising, at every stage, the statistical error generated by the algorithm.
In this way, it operates in a sufficiently independent way to create a quantitative analysis configuration adapted to an unknown
sample.
The expert system employs the usual methods of quantification but the results are obtained in half the time. Moreover, the
accuracy of the result is guaranted by the statistical error calculation as the expert system is running. 相似文献