陡变，拼音dǒu biàn，突然改变或变化。
天气陡变。
图像的边缘表现为图像上的不连续性，边缘检测就是检测图像上的不连续点或陡变点。
The edge of image is manifested as discontinuity in image, what edge detection means is to doled (in the image ) those discontinuous points or sharp variation points.
断层影响30米的范围内为应力陡变区，该范围内冲击地压发生的次数占全部次数的90 %。
The area of 30m which is influenced by fault is a sudden change area in stress, and 90% of all rock burst frequencies take place in this area.
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