A novel 1D Ladder-like coordination polymer [Na3Er(2,6-PDA)3]·11.5H2O (2,6-H2PDA is pyridine-2,6-dicarboxylic acid) has been synthesized and the crystal structure was determined by X-ray diffraction. The crystal ...A novel 1D Ladder-like coordination polymer [Na3Er(2,6-PDA)3]·11.5H2O (2,6-H2PDA is pyridine-2,6-dicarboxylic acid) has been synthesized and the crystal structure was determined by X-ray diffraction. The crystal structure of the complex belongs to Monoclinic system with space group P21/c, a=0.969 7(3) nm, b=1.914 6(6) nm, c=1.803 1(6) nm, β=91.524(5)°, V=3.346 6(18) mm3, Z=4, Dc=1.863 g·cm-3, μ=2.645 mm-1. The coordination geometry configuration of Er3+ center is tricapped trigonal prism. The structures of the title compound exhibit a novel 1D Ladder-like chain.展开更多
应用面向对象的程序设计语言Visual C++对三维参数化图形设计软件SolidWorks进行二次开发,将知识工程的思想与集装箱起重机梯子平台的设计相结合,开发出基于知识工程的集装箱起重机梯子平台智能快速设计系统(Intelligent and Rapid Desi...应用面向对象的程序设计语言Visual C++对三维参数化图形设计软件SolidWorks进行二次开发,将知识工程的思想与集装箱起重机梯子平台的设计相结合,开发出基于知识工程的集装箱起重机梯子平台智能快速设计系统(Intelligent and Rapid Design System for Stairs and Plats of Container Crane,IRDS-SPCC).综合参数化设计、特征建模和软件集成等技术,将产品的特征和产品中凝聚的知识、经验和规则一体封装,提出了"自上而下"的智能布梯的设计思路,并建立内容丰富的实例库,实现了从集装箱起重机梯子平台总体设计到零部件设计与分析的数字化.该系统的研究可为集装箱起重机整机设计及其他大型复杂机械产品的设计提供可借鉴的经验.展开更多
In this paper we describe a new copper diphosphonate compound [NH2(C2H4)2NH2]Cu3(hedp)2(H2O)4(hedp=1 hydroxyethyli denediphosphonate, CH3C(OH)(PO3)2) synthesized under hydrothermal conditions. Single crystal structure...In this paper we describe a new copper diphosphonate compound [NH2(C2H4)2NH2]Cu3(hedp)2(H2O)4(hedp=1 hydroxyethyli denediphosphonate, CH3C(OH)(PO3)2) synthesized under hydrothermal conditions. Single crystal structure determination reveals that the compound contains anionic ladder like chains of {Cu3(hedp)2(H2O)4}n which are linked by moderately strong inter chain hydrogen bonds, forming a supramolecular layer. The protonated piperazine fill the spaces between the layers.展开更多
文摘A novel 1D Ladder-like coordination polymer [Na3Er(2,6-PDA)3]·11.5H2O (2,6-H2PDA is pyridine-2,6-dicarboxylic acid) has been synthesized and the crystal structure was determined by X-ray diffraction. The crystal structure of the complex belongs to Monoclinic system with space group P21/c, a=0.969 7(3) nm, b=1.914 6(6) nm, c=1.803 1(6) nm, β=91.524(5)°, V=3.346 6(18) mm3, Z=4, Dc=1.863 g·cm-3, μ=2.645 mm-1. The coordination geometry configuration of Er3+ center is tricapped trigonal prism. The structures of the title compound exhibit a novel 1D Ladder-like chain.
文摘应用面向对象的程序设计语言Visual C++对三维参数化图形设计软件SolidWorks进行二次开发,将知识工程的思想与集装箱起重机梯子平台的设计相结合,开发出基于知识工程的集装箱起重机梯子平台智能快速设计系统(Intelligent and Rapid Design System for Stairs and Plats of Container Crane,IRDS-SPCC).综合参数化设计、特征建模和软件集成等技术,将产品的特征和产品中凝聚的知识、经验和规则一体封装,提出了"自上而下"的智能布梯的设计思路,并建立内容丰富的实例库,实现了从集装箱起重机梯子平台总体设计到零部件设计与分析的数字化.该系统的研究可为集装箱起重机整机设计及其他大型复杂机械产品的设计提供可借鉴的经验.
文摘In this paper we describe a new copper diphosphonate compound [NH2(C2H4)2NH2]Cu3(hedp)2(H2O)4(hedp=1 hydroxyethyli denediphosphonate, CH3C(OH)(PO3)2) synthesized under hydrothermal conditions. Single crystal structure determination reveals that the compound contains anionic ladder like chains of {Cu3(hedp)2(H2O)4}n which are linked by moderately strong inter chain hydrogen bonds, forming a supramolecular layer. The protonated piperazine fill the spaces between the layers.
