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25982results about How to "Avoid cracking" patented technology

Cast form water borne coating and technique for preparing the same

The invention relates to an auxiliary material for casting a mould, in particular to a casting mould water-based coating formulation for a sand mould or an expendable pattern casting (EPC), and a process for preparing the same. The casting mould water-based coating formulation consists of refractory powder, a suspending agent, a bonding agent, a surfactant, a defoaming agent, a corrosion remover and water. The process comprises the following steps: adding the suspending agent to the water directly, and mixing and dispersing the mixture in a high speed dispersion machine; adding auxiliary agents including the defoaming agent, the surfactant, the corrosion remover, and the like to the water, and mixing the auxiliary agents; adding the refractory powder to the mixture to be mixed; and adding the bonding agent to the mixture to be mixed, and then adding water to adjust the coating until the coating has the thickness in a using state to obtain the finished product. The coating prepared by the process has the effects that the coating ensures that a high-density low-viscosity coating has excellent suspension property and storage stability, a coating layer is not easy to crack after drying, the coating is advantageous to improve the capacity of the coating to resist high temperature metal corrosion, and the like.
Owner:深圳市景鼎现代科技有限公司

Access control method and access control system

The invention discloses an entrance guard control method and an entrance guard control system. The method provided by the invention comprises the following steps of: obtaining a door-opening request and a user account number which are input by a user by an entrance guard switch apparatus and sending the door-opening request and the user account number to an entrance guard managing system at the far end; storing a corresponding relation between the user account number and a user mobile terminal sign by the entrance guard managing system; responding the entrance guard managing system to the door-opening request to generate a password and a check code which correspond to the user account number; sending the password to a mobile terminal corresponding to the user account number and sending the check code to the entrance guard switch apparatus according to the corresponding relation between the user account number and the user mobile terminal sign; obtaining the password input by the user by the entrance guard switch apparatus; utilizing the check code to check the password and executing a door-opening operation after the check is passed. The technical scheme provided by the invention is as follows: the entrant does not need to carry a key substitution and also does not need to remember complicated password so that the system provided by the invention is convenient for user to use and the problem of losing the password is not existed; and the password is not easy to be cracked so that the safety is high.
Owner:ZTE CORP

Touch screen mobile phone based on fingerprint identification and login unlocking method for touch screen mobile phone

The invention discloses a touch screen mobile phone based on fingerprint identification and a login unlocking method for the touch screen mobile phone. A fingerprint acquirer is arranged behind a touch screen sensing controller. When the touch screen mobile phone is logged in and unlocked, the login unlocking method comprises the following steps of: 1, judging whether a fingerprint sample needs to be set, and if so, providing a fingerprint input frame on a touch screen, collecting fingerprint data acquired in the fingerprint input frame and storing the fingerprint data as the fingerprint sample, otherwise, entering into the step 2 for checking; 2, collecting the fingerprint data acquired in the fingerprint input frame provided on the touch screen, comparing the fingerprint data acquired in the fingerprint input frame with the fingerprint sample, judging whether the fingerprint data is matched with the fingerprint sample, and if the fingerprint data is matched with the fingerprint sample, entering a system of the mobile phone, otherwise, stepping into the step 3; 3, judging whether the number of checking times reaches a preset checking time upper limit, and if the number of checking times reaches the preset checking time upper limit, entering into the step 4, otherwise, returning to the step 2 for rechecking; and 4, indicating a user to input a personal identification number (PIN) code of the mobile phone, judging whether the PIN code of the mobile phone is correct, and if the PIN code of the mobile is correct, entering into the system of the mobile phone, otherwise, forbidding the user to enter into the system of the mobile phone.
Owner:WUHAN UNIV
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