问题描述 页面添加信息，点击提交显示添加成功，但是我的.txt文件里面没有新增的数据 原错误代码 （没...
When NAs are included as a name with the scale_linetype_manual, an incorrect error occurs: Error in grid.Call.graphics(C_lines, x$x, x$y, index, x$arrow) : invalid hex digit in 'color' or 'lty' The error says that the linetype or color g...
The utility model discloses a safe protective fence for a large-scale manual press line. The safe protective fence comprises a protective fence body; a rectangular connecting block is arranged at one side of the protective fence body; a plurality of fixed insertion slots at intervals are formed...
In management of modern large greenhouse, greenhouse environment monitoring and control are very important, now even on a small scale before greenhouse management is manual management, this traditional management methods are not only costly and inefficient, is not in line with modern production. ...
MANUAL COMPUTATION ENGINEERING TECHNICAL PROPOSAL OF MIXED DIGITAL SCALE AND CARRY LINE DIGITAL ENGINEERING METHODZhizhong LIJuyuan XU
The invention relates to the field of digital engineering method and manual computation for improving speed of computation and reducing calculation error ratio, wherein a mixed-Q digit system is employed for digital engineering, is which a digital code is added to each digit of k common Q-digit...
MANUAL COMPUTATION ENGINEERING TECHNICAL PROPOSAL OF MIXED DIGITAL SCALE AND CARRY LINE DIGITAL ENGINEERING METHODZhizhong LIJuyuan XU