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Working with molecular structures
能量梯度可视化实例
Chemcraft从Gamess-US输出文件中提取分子轨道系数和基组信息，以等密度面的形式呈现分子轨道或由密度值着色的表面（平面、球体）（参加图3）。Chemcraft提供用轨道执行操作的一些可能性（例如将一个轨道乘以另一个轨道）。创建轨道的公式取自GAMESS-US分发的PLTROB程序的源代码。用密度值计算立方体能被很好地优化。注意，如果文件中有多个分子轨道系数表，Chemcraft可以提取它们中的每一个并允许它们被渲染（例如，在MCSCF计算中，可以显示规范或自然轨道）。除了轨道的可视化，Chemcraft还提供了一个简单实用的工具，用于自动确定原子轨道形成每个分子轨道，这对分析轨道很有用。
Chemcraft basics
Chemcraft comprises a set of graphical tools for facilitating working with quantum chemistry computations. It provides convenient utilities, which help to prepare new jobs for calculation and analyze computed results. Among the main functions of the program is visualization of output files produced by quantum-chemical packages. The main supported packages are Gamess (US version and the PCGamess) and Gaussian94-09.
Chemcraft **化学计算的图形软件
Chemcraft包含一组便于**化计算的图形工具。它提供了方便的实用程序，有助于准备新的工作来计算和分析计算结果。其主要功能是对**化学包生成的输出文件的可视化。主要支持的软件包是Gamess（美国版本和PCGamess）和Gaussian94-09。
Chemcraft对于Gamess用户
Chemcraft给Gamess-US输出文件提供了非常详细的可视化。文件中的下列数据可以以图形方式呈现
Chemcraft is a graphical program for working with quantum chemistry computations. It is a convenient tool for visualizing computed results and preparing new jobs for a calculation. Chemcraft is mainly developed as a graphical user interface for the GAMESS (US version and the PCGamess/Firefly) and Gaussian program packages. For dealing with other computation types, the possibility to import/export coordinates of atoms in text format can be easily used. Chemcraft itself does not perform calculations, but can significantly facilitate the use of widespread quantum chemistry packages. Chemcraft runs under Windows and Linux (but the Linux version has some disadvantages).
Chemcraft extracts tables of molecular orbital coefficients from the output files, which can be visualized in the form of isosurfaces or colored figures. The program can read orbitals from GAMESS/Gaussian output files and Gaussian Checkpoint files (.chk, .fch), as well as computed maps in Gaussian Cube files and ADF ASCII TAPE41 files. For Gaussian computations, "#P GFINPUT POP(FULL)" should be specified in input file, so that the orbitals and basis set information are printed in the output file.
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