一种适合于网络专家系统的通用理论(英文)

描述运用于工业自动化的一种自适应自学习方法。基于此方法,Ａｐｔｒｏｎｉｘ公司开发出一套通用软件工具－ＳＴＩＭＴＭ,并应用于不同工业领域。ＳＴＩＭ可用于构造各类专家系统。基于因素空间理论,ＳＴＩＭ具有一系列独特之处,比如自动化、自学习,以及自翻译。如果与因特网,嵌入式控制器以及可编程逻辑控制器等结合使用,ＳＴＩＭ则成为一个十分有效的工具,可应用于远程连通与控制、模式识别、机器故障诊断,以及自动化加工过程中的传感器数据融合     

Mutagenic effects of sulfur dioxide onSaccharomyces cerevisiae diploid strains

Summary In resting cells of diploidSaccharomyces cerevisiae strains sulfur dioxide induces at very high frequency: a) respiratory deficinet mutants: b) mutants with altered methionine metabolism. In growing cells the following kinds of mutants appear: a) revertants for respiration; b) mutants altered in the methionine metabolism; c) SO₂-resistants. It is suggested that sulfur dioxide acts as a selective agent through the induction SO₂-resistant mutantsAcknowledgments. This investigation was supported by grant of C.N.R., Roma. The authors are grateful to Prof. Domenico L. Palenzona for helpful comments and suggestions.     

Action of some compounds on the adenosine triphosphate pool ofStreptococcus faecalis

Résumé Les auteurs étudient le contenu en ATP chez leStreptococcus faecalis, après l'addition de glucose et en présence de diverses substances. Les effets les plus évidents ont été ceux du dicumarol augmentant la valeur de la constante d'entrée et la quantité de l'ATP; du 2,4-dinitrophénol augmentant les 2 constantes (d'entrée et de décomposition); de l'arsénate réduisant la quantité de l'ATP; de l'azide augmentant la constante de décomposition; et de Ja gramicidine qui augmente non seulement la constante de décomposition mais réduit aussi la quantité de l'ATP dans le «pool».     

克拉2气田石油地质特征

克拉2气田位于库车拗陷克拉苏构造带中段, 是双重构造中呈串珠状分布的一系列褶皱中的一个局部构造. 含气层系以下白垩统巴什基奇克组砂岩为主, 其次为下第三系库姆格列木群白云岩段和砂砾岩段及下白垩统巴西盖组砂岩. 天然气中甲烷含量大于97%, 属于干气, 气源为侏罗系煤系地层. 克拉2号构造圈闭形成于西域期, 成藏期晚. 下第三系厚层膏盐区域盖层形成的良好封盖条件及其成藏期晚是克拉2大气田得以很好保存的根本原因. 克拉2气田的异常高压是由于西域期来自北部的强烈构造挤压作用而形成的.     

“名词”意义是否宽泛了点？

<中国科技术语>编辑部: 收到你们的<中国科技术语>第一期,非常感谢.读了这期文章,深感不仅是刊物名称的改动,也看到内容的拓宽与提高.     

Differential lethality in developmental stages ofDrosophila following X-irradiation

Summary ADrosophila melanogaster line has been treated with ionizing radiations. The dose-response relationship has been studied upon separate treatment of male and female gametes. The results show that while the total survival is similar, at different developmental stages differences can be observed between progenies from treated male and female gametes. It is suggested that developmental patterns may affect the expression of induced mutations.     

Differential lethality following treatment with ionizing radiations of various energies inDrosophila

Summary Male and female gametes ofDrosophila were treated with various doses of ionizing radiations: X-rays at different energy, and gamma-rays from 2 sources given singly and in 2 temporal sequences. The induced lethality was assessed in successive developmental stages by scoring the number of eggs, larvae and adults. The results clearly show that the effects of various radiations appear in terms of difference among developmental stages and/or between treated sexes/genotypes. It is suggested that the various energies affected different gene functions which are not completely independent, as supported by the non-additive effects of the two temporal sequences.Acknowledgments. The authors wish to thank Prof. D.L. Palenzona for valuable discussion and criticism and Mrs C. Brunaleschi and Mr E. Boschieri for their technical assistance.     

Tumour biology: senescence in premalignant tumours

Oncogene-induced senescence is a cellular response that may be crucial for protection against cancer development, but its investigation has so far been restricted to cultured cells that have been manipulated to overexpress an oncogene. Here we analyse tumours initiated by an endogenous oncogene, ras, and show that senescent cells exist in premalignant tumours but not in malignant ones. Senescence is therefore a defining feature of premalignant tumours that could prove valuable in the diagnosis and prognosis of cancer.