全塑通信电缆的施工安装

1进局及成端 由于全塑通信电缆允许直接上列做成端,所以在规划设计中,每条进局电缆的容量最好与总配线架每列的容量呈整数倍的关系。例如总配线架每列为1200对线的,则进局电缆可选用1200对/条或2400对/条等等。这样就可以用进局电缆直接做成端上列,省去做电缆成端接头。 利用全塑全色谱的通信电缆直接做总配线架成端时,原有的缆芯每25对线组合的基本单位及其外面缠绕的色谱扎     

Multi-task entity linking with supervision from a taxonomy

Knowledge and Information Systems - Entity linking is the task of resolving ambiguous mentions in documents to their referent entities in a knowledge graph (KG). Existing solutions mainly rely on...     

An Overview of Cotton Gland Development and Its Transcriptional Regulation

Cotton refers to species in the genus Gossypium that bear spinnable seed coat fibers. A total of 50 species in the genus Gossypium have been described to date. Of these, only four species, viz. Gossypium, hirsutum, G. barbadense, G. arboretum, and G. herbaceum are cultivated; the rest are wild. The black dot-like structures on the surfaces of cotton organs or tissues, such as the leaves, stem, calyx, bracts, and boll surface, are called gossypol glands or pigment glands, which store terpenoid aldehydes, including gossypol. The cotton (Gossypium hirsutum) pigment gland is a distinctive structure that stores gossypol and its derivatives. It provides an ideal system for studying cell differentiation and organogenesis. However, only a few genes involved in the process of gland formation have been identified to date, and the molecular mechanisms underlying gland initiation remain unclear. The terpenoid aldehydes in the lysigenous glands of Gossypium species are important secondary phytoalexins (with gossypol being the most important) and one of the main defenses of plants against pests and diseases. Here, we review recent research on the development of gossypol glands in Gossypium species, the regulation of the terpenoid aldehyde biosynthesis pathway, discoveries from genetic engineering studies, and future research directions.     

基于AutoCAD VBA技术的回转型刀具专用CAM软件开发

基于AutoCAD VBA技术开发了一套用于回转型刀具刀刃加工的专用CAM软件。首先分析了通用CAM软件加工此类零件的缺点。在此基础上,研究了新的加工方法,即“先卷绕、后补偿”,并用VBA开发工具在AutoCAD中编程实现了该方法。实践证明,用该软件生成的数控代码能够加工出合格的回转刀具。     

深基坑围护桩最大间距分析

排桩式结构是目前基坑支护工程中应用最广泛的形式,合理选取桩距可节省支护工程造价。引用土拱概念分析基坑排桩支护结构,提出的悬臂式排桩支护结构桩净距的计算公式,通过工程实例进行验算,证明比较合理。     

Thermochemical Properties of Solid Complexes of Rare Earth Nitrates with Methionine

ＴｈｅｒｍｏｃｈｅｍｉｃａｌＰｒｏｐｅｒｔｉｅｓｏｆＳｏｌｉｄＣｏｍｐｌｅｘｅｓｏｆＲａｒｅＥａｒｔｈＮｉｔｒａｔｅｓｗｉｔｈＭｅｔｈｉｏｎｉｎｅＧａｏＳｈｅｎｇｌｉ（高胜利），ＹａｎｇＸｕｗｕ（杨旭武），ＲｅｎＤｅｈｏｕ（任德厚）ＳｈｉＱｉｚ...     

Φ460mm PQF三辊连轧管机组的工艺装备优化及生产实践

介绍了针对高合金钢钢管的生产工艺特点,对Ф460 mm PQF三辊连轧管机组的工艺布置、工艺参数及设备结构等所做的优化设计、改造及其应用效果。生产实践证明:对该机组所做的优化措施合理有效,满足了高合金钢钢管的生产要求;尤其是设计阶段对主轧线能力的优化提高,避免了因轧制能力不足而出现高合金钢钢管轧制困难的情况发生。     

管道下向焊技术在大兴南高压A调压站施工中的应用

本文通过对大兴南高压A调压站工程下向焊技术的介绍,给出了下向焊技术几个关键控制点,即下向焊焊机的选择、下向焊焊接工艺评定及焊接规程的制定、下向焊焊接缺陷产生的机理和预防措施.