天然岩体由于裂隙的存在,渗透性具有明显的各向异性,研究裂隙岩体的渗透特性对准确刻画库区渗流场特征、保证洞室水封性具有重要意义。以宁波某地下水封洞库主洞室裂隙岩体裂隙特征统计数据为基础,分析得到优势裂隙组各项特征,应用Monte...天然岩体由于裂隙的存在,渗透性具有明显的各向异性,研究裂隙岩体的渗透特性对准确刻画库区渗流场特征、保证洞室水封性具有重要意义。以宁波某地下水封洞库主洞室裂隙岩体裂隙特征统计数据为基础,分析得到优势裂隙组各项特征,应用Monte-Carlo随机模拟技术生成二维离散裂隙网络(DFN)模型,并计算得到不同尺寸试样的等效渗透系数。结果表明:试样尺寸达到110 m × 110 m后,试样可等同于连续介质,此时的试样为裂隙岩体渗流表征单元体(REV)。展开更多
2,3-Dichlorobenzoic acid was prepared from 2,3-dichloroaniline by diazotization and Sandmeyerreaction to give 2,3-dichlorobenzonitrile and followed by hydrolysis with an overall yield of 58%.
The new ternary complex of [Lu(POA)3phen]n (POA is phenoxy acetic acid, phen is 1,10 phenanthroine) was synthesized and crystal structure was determined by X ray diffraction.The crystal structure belongs to monoclinic...The new ternary complex of [Lu(POA)3phen]n (POA is phenoxy acetic acid, phen is 1,10 phenanthroine) was synthesized and crystal structure was determined by X ray diffraction.The crystal structure belongs to monoclinic system with space group P21/n.a=20.394(3)? ,b=8.513(1)? , c=20.708(3)? ,β =107.70(1)° ,V=3425.1(8)? 3,Z=4,Dc=1.568Mg· m- 3,μ (MoKα )=2.939mm- 1. Each Lu3+ ion is nine coodinated. Coordination polyhedron is a distorted trigonal prism. The carboxylate groups in the complex are bonded to the lutetium ion in the bridged bidentate and the bridged tridentate. Lutetium ions were linked by the bridged carboxylate groups, resulting in an infinite chain.展开更多
文摘天然岩体由于裂隙的存在,渗透性具有明显的各向异性,研究裂隙岩体的渗透特性对准确刻画库区渗流场特征、保证洞室水封性具有重要意义。以宁波某地下水封洞库主洞室裂隙岩体裂隙特征统计数据为基础,分析得到优势裂隙组各项特征,应用Monte-Carlo随机模拟技术生成二维离散裂隙网络(DFN)模型,并计算得到不同尺寸试样的等效渗透系数。结果表明:试样尺寸达到110 m × 110 m后,试样可等同于连续介质,此时的试样为裂隙岩体渗流表征单元体(REV)。
文摘2,3-Dichlorobenzoic acid was prepared from 2,3-dichloroaniline by diazotization and Sandmeyerreaction to give 2,3-dichlorobenzonitrile and followed by hydrolysis with an overall yield of 58%.
文摘The new ternary complex of [Lu(POA)3phen]n (POA is phenoxy acetic acid, phen is 1,10 phenanthroine) was synthesized and crystal structure was determined by X ray diffraction.The crystal structure belongs to monoclinic system with space group P21/n.a=20.394(3)? ,b=8.513(1)? , c=20.708(3)? ,β =107.70(1)° ,V=3425.1(8)? 3,Z=4,Dc=1.568Mg· m- 3,μ (MoKα )=2.939mm- 1. Each Lu3+ ion is nine coodinated. Coordination polyhedron is a distorted trigonal prism. The carboxylate groups in the complex are bonded to the lutetium ion in the bridged bidentate and the bridged tridentate. Lutetium ions were linked by the bridged carboxylate groups, resulting in an infinite chain.