Revalidation of Obidosus Roewer, 1913 and description of two new cave-dwelling species of Protimesius Roewer, 1913 from Brazil (Opiliones: Stygnidae)

The penial and tarsal morphology of Protimesius is studied and morphological data support the revalidation of Obidosus with the subsequent new combinations (20 species) and restored combinations (two species). Emended diagnoses are proposed for both genera, and two cave-dwelling new species of Protimesius are described and illustrated: P. lucifer sp. nov. (Pará state) and P. orcus sp. nov. (Ceará state). An identification key to the species of Protimesius and distributional maps of Obidosus and Protimesius are provided.

http://www.zoobank.org/urn:lsid:zoobank.org:pub:C4E9C04D-A646-41E4-AE59-B6D0C951DEAB     

梯度网络平稳点集合的Hopfield稳定性与吸引域

给出梯度神经网络模型的电路实现 ,证明了网络平稳点集合的全局 Hopfield稳定性。对各个平稳点吸引域的几何估计得到了相关结果 ,这为网络初始输入的数量与方向判定提供了基本的量度参数准则。     

顶凌覆盖节水增产技术研究

通过1998年、2000年的试验研究，系统分析了顶凌覆盖技术在高寒区节水增温保温、增产增收的机理及其应用效果。提出该技术可以缓解低温干旱特别是春旱对农业生产的困扰，是一项可以抗旱保春播增产增收的实用技术，在高寒地区具有较高的推广价值。     

三峡库区移民区曲溪小流域能源利用分析

通过分析小流域的能源资源现状、不同时期能源需求变化对生态环境的影响、秸秆利用对坡耕地生产力的影响、经济发展对生物质能需求影响、节能及替代能源对生物质能需求的影响等,提出了解决能源问题,促进生态环境持续改善的对策.     

浅析西部地区文献信息资源的重组

阐述了西部地区文献信息资源重组应遵循的原则以及文献信息资源重组的条件，并提出了文献信息资源重组的措施。     

一种三角形分解的大集和超大集

混-4三角形分解的大集,记为LT4(v,λ,4λ),是一个集族{(X,(β)r):1≤r≤v-2/λ}.其中,X是一个v元素,每一个(X,(β)r)是一个混-4三角形分解T4(v,λ,4λ).混-4三角形分解的超大集,记为OLT4(v,1,4),是一个集族{(X\{x},(A)x):x∈X}.其中,X是一个v 1元集,每一个(X\{x},(A)x)是一个混-4三角形分解T4(v,1,4).给出了LT4(v,λ,4λ)和OLT4(v,1,4)存在的充分必要条件.     

四川红层分布区地下水水化学若干问题探讨——以自贡市为例

利用钻孔试验分析了自贡红层分布区地下水水化学的水平及垂直分布特征,探讨了该区地下水的水化学特征及形成原因,进而探讨红层水资源开采等引起的咸淡水混合、水质变化等相关环境问题.     

欠发达地区实施跨越式技术创新的探讨

文章简述了跨越式技术创新及其在国内外的普遍现象，指明了欠发达的山西实施跨越式技术创新的有利条件及其应采取的措施。     

Molecular cloning and expression of interleukin Ibeta (IL-1β) from red seabream (Pagrus major)

The interleukin 1β (IL-1β) cDNA was cloned from the red seabream (Pagrus major) by homology cloning strategy. A cDNA fragment was amplified by PCR using two degenerated primers, which were designed according to the conserved regions of other known IL-1β sequences, and elongated by 3' ends and 5' ends RACE PCR to get the full length coding sequence of red seabream IL-1β (RS IL-1β). The sequence contained 1252 nucleotides that included a 5' untranslated region (UTR) of 84bp, a 3' UTR of 410 bp and an open reading frame (ORF) of 759 nucleotides which could be translated into a putative peptide of 253 amino acids with molecular weight of 28.6 kD and putative isoelectric point pI of 5.29. The deduced peptide contained two potential N-glycosylation sites and an identifiable IL1 family signature, but lacked the signal peptide and the clear ICE cut site, which were common in other nonmammalian IL-1β genes. The RS IL-1β had the highest homology with piscine IL-1β according to phylogenetic tree analysis.     

A data model for regions with indeterminate boundaries

Most of spatial phenomena like natural vegetation units and land use areas constantly change over time and have uncertainty spatial extents. Till now, a considerable number of data models have been proposed for spatial objects with sharp boundaries as well as with indeterminate boundaries. However, they mainly concern space and time or space and fuzziness and not yet integrate them into a single unified framework. This paper introduces a formal definition of the conceptual fuzzy spatiotemporal data model, called FSTDM for fuzzy regions based on fuzzy set theory. We also contribute a method of manipulating queries with the presence of both temporal predicate and fuzzy spatial predicate in the condition clause efficiently. We then implement a prototype system.Through the experimental results, we prove that our work can be used to build a specialized system such as GIS, spatial database, and so on.