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A type of handhold computer that has been researched successfully is introduced as the application case and practical usage effect about fault tolerance technology in the machine. At the meantime, it can be as a usage for reference while the same type of machine brings in fault tolerance technology in order to increase its reliability. So, it has greater availability and extended character. 相似文献
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《保鲜与加工》2003,(10):97-100
It is very difficult to simulate the motion process of drill by accurate mathematics model for the complexity and invisibility of stratum. The fault of drill is usually identified and disposed by personal experience so far. This means it can not estimate the trend of the equipment running good or not and the reason conduced the fault or location and degree of fault by data measured. Farther, it can not give the expert suggestions. Based on the studying of drill fault, artificial intelligence and expert system have been used in the petroleum drilling engineering, the theory and method of fault diagnosis intelligence system for drill have been studied. It also constitutes the expert knowledge database of graphic Fuzzy Neural Network for the familiar fault of drill. The intelligence reasoning machine which consists of expert rule, Fuzzy logic and artificial Neural Network have been bring forward. And the fault diagnosis system it makes for drill can be applied in complex system which includes multi-variable, multi-parameter and multi-process. 相似文献
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The inherent fault tolerance of multilayer neural networks (MLNs) is due to thedistributed properties of information processing and information storage in an MLN , and the inher-ent fault-masking capability of every neuron. Also,the concept of inherent fault tolerance of MLNsis formalized, Finally, perceptrons and three-layer nets are shown inherently fault tolerant underreasonable statistical conditions,respectively. 相似文献
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The interconnection network used in a multiprocessor system provides an effective mechanism for the data exchange between the processors and is one of the dominating factors of performance of the system. The fault tolerance of an interconnection network can be measured by the probability that the network keeps functional in the presence of failures. The authors examine the fault tolerance of four regular interconnection networks (i.e. hypercube, crossed cube, Moius cube, and locally twisted cube) with the probabilistic approach. Experimental results show that all these interconnection networks display excellent fault tolerance. Moreover, the crossed cube enjoys the highest probabilistic of connectivity among them. 相似文献
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Analysis and Strategic Decision of Extinguishments System at the Initial Stage of Fire in Commercial Buildings 
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下载免费PDF全文 The best chance to extinguish the fire in commercial buildings is at the initial stage of a fire.For the problems during extinguishments at the initial stage of fire,a fire extinguishment system model at initial stage of fire in commercial buildings is designed.The fire data come from the fire cases in Chinese commercial buildings.The expected value and Variance of probability of basic events are calculated by using Bayesian statistical analysis method,which has overcome the difficulty from inefficient fire datum and obtaining repeated fire experience.Then the failure probability of extinguishments system at initial stage of fire is concluded from fault tree analysis and the error propagation analysis of fault tree is made.A systematic strategic decision has been made finally. 相似文献
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水稻籼型不育系萌发期和幼苗期的耐盐性评价 总被引：1，自引：0，他引：1
为了鉴定水稻籼型不育系在不同生育阶段的耐盐性,筛选出适合耐盐杂交水稻新组合测配的强耐盐不育系,笔者分别在萌发期、幼苗期对8个水稻籼型不育系进行耐盐性鉴定,以耐盐品种FL478、盐敏感品种IR29为对照。结果显示：盐胁迫对水稻种子的萌发起到抑制作用,抑制效应随盐浓度的提高而增强,10 g/L NaCl浓度胁迫能较好反映水稻不育系萌发期耐盐性的差异。‘沪旱7A’、Y58S在萌发期的耐盐性最好,与FL478均属于1级,具极强的耐盐性;‘荃9311A’的盐害级别为3级,具强耐盐性。盐胁迫对水稻幼苗的生长也起到明显的抑制作用,8 g/L NaCl浓度胁迫下的枯叶率性状能较好反映水稻不育系幼苗期耐盐性的差异,‘沪旱11A’与耐盐对照FL478耐盐性相仿。 相似文献
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M. Ratinam A. M. Abd El Moneim M. C. Saxena 《Journal of Agronomy and Crop Science》1994,173(5):345-353
Enhancement of cold tolerance is an important aspect in breeding forage legumes in view of increasing interest in extending the cultivation of these crops. Three classes of characters — morphological, morpho-physiological and biochemical — were considered in selection for cold-tolerance between and within forage legume species under contrasting growing conditions in the field and a plastic house.
Significant correlation was found between cold damage and concentration of sugars m roots of various forage legume species which were grown under field conditions and subjected to natural frost. Both morphological as well as morpho-physiological characters were related to cold tolerance in Lathyrus ochrus (L.) DC. This indicated that chemical constituents cannot be used as a sole criterion to select for winter-hardy strains of this species. Root-shoot ratio showed a consistent relationship with tolerance to cold irrespective of the growing conditions and season. Hence, sugar concentration and root-shoot ratio are useful characters in testing species found cold tolerant by other methods. The root-shoot ratio could be used for testing cold tolerance under controlled conditions. The number of primary branches per plant, root weight and shoot weight may be used as morphological characters in selection for cold tolerance in L. ochrus under field conditions. 相似文献
Significant correlation was found between cold damage and concentration of sugars m roots of various forage legume species which were grown under field conditions and subjected to natural frost. Both morphological as well as morpho-physiological characters were related to cold tolerance in Lathyrus ochrus (L.) DC. This indicated that chemical constituents cannot be used as a sole criterion to select for winter-hardy strains of this species. Root-shoot ratio showed a consistent relationship with tolerance to cold irrespective of the growing conditions and season. Hence, sugar concentration and root-shoot ratio are useful characters in testing species found cold tolerant by other methods. The root-shoot ratio could be used for testing cold tolerance under controlled conditions. The number of primary branches per plant, root weight and shoot weight may be used as morphological characters in selection for cold tolerance in L. ochrus under field conditions. 相似文献
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外源一氧化氮对盐胁迫下烟草幼苗生理及抗氧化性的影响 总被引：2，自引：0，他引：2
为探究外源一氧化氮（NO）对盐胁迫下烟草幼苗的影响,为了解烟草抗盐机制和生产应用提供一定参考,以烟草品种K326为研究对象,使用硝普钠（sodium nitroprusside,SNP）作为外源一氧化氮供体,研究不同处理烟草幼苗的生理及抗氧化性。试验结果表明,盐胁迫会显著抑制幼苗的正常生长发育,通过使用不同浓度的SNP预处理后,烟草幼苗叶片含水率明显上升,根系活力上升,提高了胁迫环境下的叶绿素含量,渗透物质含量显著增加,幼苗体内的多种抗氧化酶含量显著升高,过氧化氢含量和MDA含量下降,降低了膜脂过氧化的程度,保护细胞结构不被破坏,降低叶片细胞透性。试验结果说明,外源一氧化氮可以有效提高烟草幼苗的耐盐性,并且具有明显的浓度效应,0.10mmol/L SNP预处理的效果最好,试验结果为提高烟草的耐盐性提供一定依据。 相似文献
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On the basis of fault diagnosis expert system, the rough set theory is introduced. Knowledge representation system table is taken as a major tool to reduce the rules of expert system in which unnecessary properties are eliminated. The redundancy of fault diagnosis information is revealed. The complexity of fault diagnosis expert system's structure is also reduced. The decision making rules are given finally. 相似文献
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以新疆杨叶片为外植体,研究新疆杨组织培养再生体系建立的主要影响因素。结果表明:诱导愈伤组织的最佳培养基组合为MS+0.5 mg/L 6-BA+0.5 mg/L 2,4-D;愈伤组织分化的最佳培养基组合为MS+0.1 mg/L TDZ+0.3 mg/L IBA,不定芽增殖的最佳培养基组合为MS+1.0 mg/L 6-BA+0.3 mg/L IBA,诱导生根的最佳培养基组合为1/2MS+0.5 mg/L IBA,新疆杨组培苗在生根培养基上形成的根条数多,苗体健壮,生根率达到100%。本研究成功建立了新疆杨组织培养再生体系,为其转基因研究工作奠定了基础。 相似文献
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水分胁迫对不同木薯品种叶片生理生化的影响 总被引：2，自引：0，他引：2
木薯作为一种重要的亚热带粮食/能源作物,备受重视。为了探索水分胁迫对不同木薯品种的影响,对3个木薯栽培品种进行了不同梯度的干旱处理,利用相关及判别分析方法研究其相关生理生化指标与木薯抗旱性的关系。结果表明,随着水分胁迫强度的增加,不同木薯品种Fv/Fm有不同程度的降低,测试品种中SC124降低幅度最大,SC5变化最小;ABA含量则有所增强,变化幅度因供试品种而异,SC124变化最为显著,SC5增强幅度最小。本次测试的木薯3个品种的抗旱能力显示,SC5相对较耐干旱,SC124相对不耐干旱。 相似文献
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On the use of spectral reflectance indices to assess agro‐morphological traits of wheat plants grown under simulated saline field conditions 下载免费PDF全文
下载免费PDF全文 S. E. El‐Hendawy W. M. Hassan Y. Refay U. Schmidhalter 《Journal of Agronomy and Crop Science》2017,203(5):406-428
Successful breeding of plants for salinity stress tolerance requires realistic growing conditions and fast, non‐destructive evaluation techniques for phenotypic traits associated with salinity tolerance. In this study, we used subsurface water retention technique (SWRT) as a growing condition and spectral measurements as an evaluation method to assess different agro‐morphological traits of salt‐tolerant (Sakha 93) and salt‐sensitive (Sakha 61) wheat genotypes under three salinity levels (control, 60, and 120 mm NaCl). The effects of salinity on agro‐morphological traits were evaluated and related with forty‐five published vegetation‐ and water‐spectral reflectance indices (SRIs) taken at both the heading and grain milk growth stages for each salinity level, genotype, and growth stage. In general, the agro‐morphological traits gradually decreased as salinity levels increased; however, the reduction in these traits was more pronounced in Sakha 61 than in Sakha 93. The effect of salinity levels and their interaction with genotypes on the SRIs was only evident at the grain milk stage. The performance of the spectral reflectance indices depicted that the closest associations with agro‐morphological traits depended on salinity level, degree of salt tolerance of the genotypes, and growth stage. The SRI‐based vegetative indices correlated better with growth and yield of Sakha 93 than SRI‐based water indices and vice versa for Sakha 61. The SRI‐based vegetative and water indices are effective for assessment of agro‐morphological traits at early growth stages under high salinity level. The functional relationship between grain yield per hectare and the best SRIs was linear for the high salinity level and Sakha 61; however, the quadratic model was found to best fit this relationship for the control, moderate salinity level, and Sakha 93. The overall results indicate that the usefulness of the SRIs for assessment of traits associated with salinity tolerance is limited to salinity level and growth stage. 相似文献
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This paper presents a reactive power optimization method which combines thelinear programming model with secure correction. In correction. this mOdel presents a new idea inwhich the feasible control region of con trol variables is resolved by over constrained state varlables. This method is quick and reliable and overcomes oscillation of a general linear programming model. 相似文献
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Genetic divergence among cold tolerant rices (Oryza sativa L.) 总被引：1，自引：0，他引：1
Summary Genetic divergence was investigated among 17 rice varieties known to possess some degree of cold tolerance at different growth stages. The 17 varieties and their 102 F1 hybrids with 6 male testers were studied for isozyme variation at 15 loci, spikelet fertility, and degree of cold tolerance at various stages. Multivariate analyses of the data provided several schemes of divergence based on various sources of evidence. All schemes gave similar results, and separated the varieties into japonica and indica groups. The japonica group displayed specific isozymes, a low F1 fertility with indica testers, and a high degree of cold tolerance which was expressed in the F1 progenies. The indica group displayed contrasting specific isozymes, a high F1 fertility with indica testers, and a moderate to low degree of cold tolerance which was not expressed in the F1 progenies. One variety, ARC 6000, displayed unique traits in most schemes and was classified into a distinct type based on the isozymes. The results emphasize that cold tolerance is a major trait for classification of rice into two varietal groups and that proper characterization of potential donors is essential in breeding. Isozyme studies are useful tools for this purpose. 相似文献
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Cinara Lima Echart José Fernandes Barbosa-Neto David F. Garvin Suzana Cavalli-Molina 《Euphytica》2002,126(3):309-313
Aluminum (Al) tolerance in roots of two cultivars of barley was studied using hematoxylin staining and root re-growth procedures.
This study was performed in two F2 segregating populations originated from crosses between the tolerant FM-404 and sensitive Harrington cultivars. The F2 progeny analysed with hematoxylin staining revealed a segregation ratio of 3 tolerant: 1 sensitive, showing that the Al tolerance
is controlled by a single gene with complete dominance for tolerance. The root re-growth measures do not confirm the 3:1 ratio.
This last result can be explained due to the occurrence of genes that affect root growth rate or to the difficulties found
in the evaluation of root re-growth. Barley has a complex root system, which makes it difficult to measure root re-growth
after an extended period in nutrient solution. Due to the simplicity, reliability and better precision, the hematoxylin staining
is the best procedure to determine the Al tolerance and its inheritance in barley.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
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In order to solve the incipient fault diagnose problem of the transmission system, a networking condition monitoring and failure diagnosis system based on B/S and C/S hybrid architecture for wind turbine transmission system is designed in the paper. Firstly, the paper analyzes the demands of condition monitoring and fault diagnosis system for wind turbine transmission system, and designs its overall framework and function modules. Then, combining with the data acquisition equipment, by the .NET and SQL Server platform, the paper designs condition monitoring and failure diagnosis system for wind turbine transmission system, which includes the functions of networking data acquisition, remote condition monitoring, signal analysis, fault diagnosis and database as well. The system has been successfully applied to a condition monitoring and fault diagnosis of wind turbine transmission system. 相似文献