MODFLOW 中现有的降水补给数据和井流数据是基于每个剖分网格输入的，导致基于 MODF-LOW 建立大区域水流数值模型前处理的降水补给文件和井流文件存储开销过大、读取效率低。为此，通过改进现有的降水补给子程序包 RCH 及开发新的子程序包 RAW，给出了一种基于面状补排项的数据输入新方法。改进后的 MODFLOW 程序通过读取 RCH 文件或 RAW 文件中每个分区的补排量数据，以及每个网格对应的分区编号，在程序内部实现了补排量向每个模型网格的分配。RAW 子程序包实现了多层面状补排量的表达，可用于面状的地下水开采、农业回灌等源汇项的处理。相对于原始的源汇项数据存储方式，基于新方法建立的华北平原地下水流模型，RCH 及 RAW 文件大小分别减小为原来的1/145和1/255，整个模型数据的读取时间的加速比为7．46。

Reading and writing precipitation and well data are all based on each grid in the existing MODFLOW.So building regional groundwater flow numerical models with refined spatial and temporal discretization often involves storing and reading large quantities of well and precipitation data.However, the storage requirement can be prohibitive and the program efficiency can be quite low.To address this problem,we have modified the existing package RCH and also developed a new package named RAW (recharge and well ), which is based on the existing packages in MODFLOW. The improved MODFLOW program can only read values of every subarea and the subarea number of each grid which is stored in the RCH or RAW file,and then allocates the values to corresponding grids.With the RAWpackage,the area recharge and discharge could occur in all layers.Therefore,it could be used to simulate the source and sink term,like groundwater exploitation and agricultural irrigation return.The correctness has been verified

采用固定床微分反应器，在常压、450～500℃、甲烷体积分数10％～35％条件下，进行铜基催化剂上甲烷催化燃烧动力学特性研究。研究表明，甲烷分压对反应速率影响显著，而氧气分压的影响可以忽略。采用最小二乘法进行动力学模型参数估计，建立的反应动力学模型为-rCH4＝1．61×10^7×e^-108000/RT×pCH4^0．5。检验结果表明，所建模型与实验数据良好相容，是适宜和可信的。根据实验结果推断甲烷催化燃烧分两步进行，首先氧气快速与铜基催化剂上活性空位点反应，形成吸附氧气分子；随后吸附氧气分子和甲烷分子反应，生成二氧化碳和水。

An experimental investigation of methane combustion on copper-based catalyst was carried out in a micro-fixed bed reactor under atmospheric pressure at 450~500 ℃ with inlet methane volume fraction between 10%and 35%.The influence of methane partial pressuer on reaction rate is found to be significant, while that of oxyge n is nelg ecat ble.Parameters of the kinetic model were estimta ed using the least squares method.The resulted kinetic model of methane catalytic combustion is-rCH4=1.61 ×107 ×e-108 000/RT ×pCH40.5 .Predicted and experimental values of methane conversion agree well with each other, which shows the reliability and accuracy of the model.The above reaction can be described as a two-step reaction according to the experimental result. Oxygen reacts quickly with the active vacancy sites of the catalyst to form adsorbed oxygen molecules which reacts with methane molecule to form carbon dioxide and water.

加强对后浇带施工技术在房建工程中的要点的研究是十分必要的.本文作者结合多年来的工作经验,对后浇带施工技术在房建工程中的要点进行了分析,具有重要的参考意义.

It’s very necessary to Enhanced the resea-rch of the late grouting zone construction technology in construction engineering.In this article, the author combines years of experience to analysis the late gro-uting zone construction technology in construction engineering, which has important reference significa-nce.

为了有效减少建筑工程决算超支的情况发生,保证工程的施工进度和施工质量,我们有必要对建筑企业项目工程造价管理与控制的有效措施进行深入的研究与探析.本文就主要探讨了建筑工程的造价管理和成本控制.

In order to effectively reduce the cost overruns in the construction budget of the project and to ensure the prog-ress and quality of construction, it is necessary to deeply resea-rch and analysis the effective measures of cost management and control in the construction enterprise project. This article mainly discusses the cost management and cost control of con-struction engineering.

本文主要结合笔者多年的城市规划实践经验，研究了在新时期背景下，城市规划的设计与管理工作对城市建设的调控作用，并给出了新时期现代化城市规划方向与具体措施，以期促进我国城市建设的可持续发展，仅供读者参考。

This paper, combined with the author’s many years of practical experience of city planning, carried out the resea-rch of the function of design and management of city planning on the city construction in the new era background and pro-posed the planning direction of modern city and specific me-asures in new era, in order to promote the sustainable devel-opment of city construction, offering reference for readers on-l y.