Vegetable cover film to "five"

1. Prevent the occurrence of roasted seedlings in mulching and cold vegetable mulching. There are two reasons: one is that the bleed is not timely or the amount of bleed is not enough, the film burns the seedlings under high temperature; the second is the rigorous closing of the planting holes, etc. High-humidity gas bursts out of the hole and damages the crop's stems and leaves. The prevention method is to release the wind in a timely manner. Usually, the membrane holes and the planting holes that lead to the seedlings must be sealed. There are also two reasons for the occurrence of cold seedlings (including frost and cold damage) in mulching film cultivation: first, early planting (seeding), and second, cold spring. The prevention method is to increase temporary cover to prevent cold.

2, to prevent the shortage of fertilizer and water There is a shortage of fertilizer and water in the mulching cultivation of vegetables, which is usually due to the increased demand for fertilizer and water from vegetables, and the peak period is advanced. However, the base fertilizer and bottom mash are insufficient, or the management of fertilizer and water does not keep up. Prevent methods: First, increase the amount of basal fertilizer and pouring enough water; Second, according to the characteristics of plastic film cultivation and the need for fertilizer and water law, timely fertilizer and watering.

3, to prevent grassland in the middle and late grassland in the latter part of the grassland, can be taken to solve the following methods: First, the choice of weeding film or black film; Second, manual weeding; Third, when the weeds arch up the film, directly on the film pressure earth stuffy grass .

4, to prevent the density of vegetables covered with plastic film cover cultivation, generally lower than the density of conventional open cultivation of 5% to 15%.

5. Prevention and control of insect pests Due to the advancement of mulch-covered cultivation materials, some diseases and pests will also occur in advance, and prevention and control should be implemented as soon as possible.

Face Attendance Machines

Face attendance machine is the use of face attendance machine, the use of face recognition technology, the use of face differences to identify personnel. Through the extraction of portrait feature points, using the principle of biostatistics to establish a face feature template for personnel login, and in recognition of the user's face image update to improve accuracy.
Face attendance machine is the use of today's international science and technology field of high precision technology - face recognition technology (integration of computer image processing technology and biostatistics principle in one), the use of computer image processing technology from the video to extract portrait feature points, using the principle of biostatistics to analyze and establish face feature template. When a registered person walks past the Facial Recognition machine, it prompts "hello" or the person's name to indicate successful attendance. Moreover, it also has the image update function, if the image is taken as the first face, stored for the second face, if the first face image is consistent with the second face image, face recognition attendance machine will automatically store the first face image to update the second face image. This method can keep the user's face image updated, reduce the influence of face shape change on recognition, and increase the accuracy of recognition.

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