68results about How to "Overcome application flaws" patented technology

The invention relates to a ferrum (Fe)-based amorphous alloy material, in particular to a Fe-based amorphous alloy strip for treating printing and dyeing wastewater and a preparation method thereof. According to the conventional literatures and technical data, an alloy component with Fe-based amorphous alloy strip forming capacity is selected; and general requirements show that the selected alloy component comprises more than 50 percent of Fe atoms, preferably 60 to 85 percent, so the reduction decoloring capacity of the Fe atoms is exerted. The amorphous alloy strip is obtained by adding a small amount of other elements and performing rapid solidification by using melt spinning equipment. The decrystallization of zero-valent Fe is realized by preprocessing technology; the decoloring capacity of the Fe atoms is kept; the rusting consumption of the Fe in the wastewater treatment process is effectively reduced; the strip is repeatedly and persistently utilized on the premise of guaranteeing the decoloring rate; the technical defects and the application defects in the conventional method for treating the printing and dyeing wastewater by using reducing Fe powder or waste cast Fe scraps are overcome; and the Fe-based amorphous alloy strip relates to the field of potential application of decrystallization technology in the industrial field, and has an extremely high application prospect.

The invention relates to a piezoelectric fiber containing a metal core with part coated with an electrode, which comprises a metal core (1), a piezoelectric material (2) coating the metal core (1) anda coating electrode (3) coating the outer surface of the piezoelectric material (2). The surface of the piezoelectric material (2) comprises an electrode coated part (3) and a non electrode coated part (4); the electrode coated part (3) is a coated electrode (31) which partially covers the surface of the piezoelectric material (2) along the extending direction of the piezoelectric fiber containing a metal core. The piezoelectric fiber containing a metal core with part coated with electrode of the invention can realize the driving functions of driving components such as traditional piezoelectric bimorphs, can be used as micro-drivers and for energy recycling and vibration control, and especially can realize the function of bending vibration, thus overcoming the application disadvantages ofthe existing piezoelectric fibers.

The invention discloses a separation and purification method of methionine. The separation and purification method includes the steps of firstly, adding acid into methionine salt for acidification, cooling, crystalizing, performing suction filtration to obtain filtrate and methionine crystals, and further washing the methionine crystals to obtain washing liquor and wet methionine; secondly, combining the filtrate and washing liquor obtained in the first step to obtain mixed liquid, concentrating the mixed liquid to obtain mother liquor with salt content being 10-28wt% and methionine content being 2-5%, decoloring the mother liquor, filtering with a precision filter, performing homogeneous membrane electrodialysis, and desalting until salt in a light chamber is lowered to 3-7wt%; thirdly, performing heterogeneous membrane electrodialysis on the solution in the light chamber after the treatment of the second step so as to perform deep desalting until the salt in the light chamber is lowered to below 0.1wt% to obtain a methionine aqueous solution, and further concentrating and crystalizing the methionine aqueous solution to obtain the methionine. The method has the advantages that the salt liquid containing the methionine needs not to be diluted, inorganic salt filtrate containing the methionine needs not to be concentrated repeatedly, and the methionine can be prevented from having thermal decomposition caused by the repeated concentration to generate malodorous gas.

The invention discloses a face recognition method and system, wherein the face recognition method mainly includes a face recognition process and a key verification process. The face recognition process includes: collecting the user's face image or video, detecting the face area and determining the facial feature information required for recognition, matching the collected facial feature information with the facial feature information pre-stored in the system, and if the match is consistent Then send face recognition success information. The key verification process includes: after receiving the successful face recognition information, randomly generate a new key and send it to the user's mobile terminal and system information database, the user enters the received key, and compares it with the key stored in the system Compare and record the information if it is correct. The present invention adopts the double verification method of face recognition and random key, avoids the system application defects that may occur when only relying on the face recognition method or the key verification method, and simply and effectively improves the safety and effectiveness of the system.