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segy1
地震波场数值模拟是研究复杂地区地震资料采集处理和解释的有效辅助手段，地震波场数值模拟的主要方法包括两大类，即几何射线法和波动方程法。有限差分法是波动方程法中非常重要的一种方法，它的主要优点是占用内存小，计算速度快。论文采用高阶交错网格差分技术对一阶速度-应力弹性波方程进行数值求解,并对差分方程稳定性条件、频散问题以及边界条件处理进行了讨论。(Numerical simulation of seismic wave is a effective auxiliary means for studying seismic data acquisition, processing and interpretation. The main methods of seismic wave numerical simulation include two major categories, namely, the geometric ray method and the wave equation. Finite difference method, which main advantages are the small memory and computing speed, is one of the very important way for wave equation simulation. Paper uses the high order staggered-grid difference method for numerical calculation of the first order elastic wave equation with velocity and stress. And the stability condition of difference equation, dispersion problems, as well as boundary condition are discussed. )
- 2010-08-19 15:36:53下载
- 积分：1
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SVR
训练SVR模型做预测,可调整训练集和测试集比例及SVR参数，预测性能用MAP反映(The training SVR model can be used for prediction. The proportion of training set and test set and the parameters of SVR can be adjusted. The prediction performance can be reflected by MAP.)
- 2021-03-29 09:39:10下载
- 积分：1
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plsql8[1].0
PL/SQL Developer V8.0.4.1514 注册机版(PL/SQL Developer V8.0.4.1514 RI Edition)
- 2020-06-25 21:40:02下载
- 积分：1
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knn_svm_tree
说明： 对于iris数据集的knn、svm、决策树算法分类的简单实现(Simple implementation of KNN, SVM and decision tree algorithm classification for iris dataset)
- 2020-10-13 17:06:06下载
- 积分：1
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oracle
说明： oracle 数据库导入导出；自定义导入导出参数；(oracle database import and export custom import and export parameters )
- 2011-03-29 09:46:32下载
- 积分：1
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diyizhang
数据的逻辑结构、存储结构及它们之间的关系和相应的基本操作运算的定义和实现。
本书围绕数据结构的三种基本结构：线性结构（第2-5章）、树形结构（第6章）和图形结构（第7章）展开讨论，研究解决如下问题：一个具体问题的逻辑数据结构是什么？适宜选用什么样的存储结构？采用什么样的操作实现算法效率更高？
(Logical structure of data storage structure and the relationship between them and the corresponding basic operation and the realization of the definition of computing. The book data structure around three basic structure: a linear structure (the first chapter 2-5), tree-like structure (Chapter 6) and graphics structure (Chapter 7) initiate discussions to resolve the following issues: a specific problem What is the logic of the data structure? Suitable choice of what kind of storage structure? What kind of operation to achieve more efficient algorithm?)
- 2008-12-19 23:57:19下载
- 积分：1
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竖井开挖啊
说明： 基于flac3d 5.0隧道开挖所使用的循环命令(Cyclic commands used in tunnel excavation based on FLAC3D 5.0)
- 2020-06-21 13:40:01下载
- 积分：1
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oraclexmltutorial
oracle XML 文档
oracle XML 文档(oracle oracle XML )
- 2007-04-26 21:48:38下载
- 积分：1
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craft
Data Structures for Text Editing
- 2013-09-23 06:12:49下载
- 积分：1
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74025819
提供了4种解常微分方程组的c++代码：定步长四阶龙格-库塔(Runge-Kutta)法(RK4->RKDUMP)；(In this paper, four c codes for solving ordinary differential equations are provided: the fourth order Runge-Kutta (Runge-Kutta) method with fixed step size (RK4-))
- 2018-11-20 16:57:32下载
- 积分：1
