Check the state of the straw separated : if the straw is seriously broken , the cylinder and the concave must be adjusted to lessen excessive threshing ; if the straw is complete and unbroken , the quantity of wind shall be increased to make the chaff on the sieve surface the state of floating or the opening of the chaffer shall be slightly increased to make the grain fall through the sieve 检查单个稻草的状况：如果稻草严重受损，必须调节滚筒和凹面以减小脱粒过猛；如果稻草完好无损，则必须增大风量使得谷筛表面的废渣飘浮起来，或者慢慢加大谷筛孔，使得谷物穿过谷筛。
In this system , we employed a newly developed holographic filed concave grating as splitting beams element , as well as multi - channel photodetector - ccd ( charge coupled devices ) as spectrum detection . these all solidified the foundation of measurement ; microcomputer control make the system automatic 采用新型的全息平场凹面光栅作为分光元件，并引入多通道光电探测器件ccd进行光谱信号探测，为光谱反射率的测量准备了物质条件；采用微型计算机控制，达到自动化测量。
This thesis discusses maslov ' s method , wavelet transform and their applications to asymptotic evaluation of wave equations in high frequency fields . the method of solving wave equations in caustic domain by symplectic geometrical theory , and the method of simplifying two - dimension wave equations in slowly varying nonhomogeneous medium by wavelet - transform theory are proposed . the caustics phenomena of electromagnetic wave propagation in concave reflector , the singularities of caustics , and the method of computing wave fields in and far away from the caustics in concave reflector are also discussed 本论文探讨了maslov方法在波动方程高频近似中的应用及焦散区的具体求解方法；讨论了用小波变换化简二维非均匀缓变介质条件下的波动方程；本文还讨论了凹面反射的焦散现象、凹面反射焦散区的奇性种类，讨论了二、三维凹面反射波动场非焦散区、焦散区的计算方法。
