Abstract: Provided are an N-phenylimine derivative and a preparation method and use thereof. Provided is an N-phenylimine derivative, being selected from the group consisting of: a 1,2,4-oxadiazole-N-phenylimine derivative represented by formula 1, a 1,3,4-oxadiazole-N-phenylimine derivative represented by formula 2, an N-phenylimine amide (ester) derivative represented by formula 3, and an N-phenylimine benzoate derivative represented by formula 4.

Abstract: A reflow oven central monitoring method includes setting standard operating parameters of a reflow oven, acquiring real-time operating parameters of the reflow oven, and comparing the real-time operating parameters respectively to the standard operating parameters to determine whether a difference exceeds a predetermined range. If the difference exceeds the predetermined range, workpieces are stopped from flowing into the reflow oven, a position of abnormal workpieces is locked, an alarm signal is sent, a prompt of locking the position of the abnormal workpieces is sent, and at least one of the real-time operating parameters is provided for inspection of the abnormal workpieces. The standard operating parameters include a standard temperature of each reheating zone of the reflow oven, a conveying speed of the reflow oven, and an oxygen content. The real-time operating parameters respectively correspond to the standard operating parameters.