Abstract: A personal feature information security assurance system. The system is composed of a personal information acquiring and verifying apparatus, a service management platform, and a centralized supervision and management platform. On the basis of the verification of existing personal feature information, structural settings, which are determined by an information subject person and the management platform, and increase, decrease or vary graphics and modify parameter conditions in acquired information, are added, or combinations of different changes to information are determined to express different situations and actual requirements, the use security is assured by means of active and variable verification, and the security can still be effectively assured even if the personal feature information is stolen or lost.

Abstract: A security verification system featuring user autonomy includes a client applied to wired and wireless communication devices and a server corresponding to the client, and contains management and control platforms at all levels and associated devices. The management and control platforms ensure the security of connection between the client and the server. The management and control platforms and the server provide different user interfaces and different application permissions according to autonomous access conditions set after authentication of the client, and take further action according to different input authorization confirmations, so as to achieve the practical effect of safely handling various situations and realize customized setting. With the simple, rational and easy-to-implement structural features, the system can ideally overcome the shortcomings of existing client applications, and can effectively and reliably ensure the security of client applications and meet different individualized needs.

Abstract: Provided is a simple and convenient self-locking nut.

Abstract: Disclosed is a ring type locknut, where a frustum-shaped internal thread concave cavity is arranged on a nut, inside which an annular member with frustum-shaped internal and external threads matching the concave cavity nut is provided, an eccentric value based on a specification thread fit clearance is set between internal threads and external threads of the annular member, so that when the annular member is screwed into a bolt together with the nut for locking, the expected objective that the nut will not loosen by only locking a single structure is achieved thanks to a comprehensive effect of the formed original nut structure, the eccentricity of the annular member and the structure of multiple properties of the tapered thread; the single-structure nut is used in a superposed mode, or the annular member is arranged on another nut, so that the overall anti-loosening effect is improved by the double-nut structure.

Abstract: A lock nut includes: a first nut having a tapered cavity; and a second nut including a base portion and a tapered lug boss arranged the base portion. The tapered lug boss can be coupled inside the tapered cavity. The first and second nuts are used in pair by self-locking. A straight slot is formed in the lug boss. Under the locking action of the first nut, the straight slot is deformed to further lock a bolt, or is discontinuously engaged with teeth of the bolt to increase an effective stress surface and locking performance of the second nut for locking the bolt. A convex reinforcing rib extends on a first surface of the first nut. An annular groove is formed in a second surface of the second nut. The convex reinforcing rib is coupled with the annular groove to enhance the strength and reliability of locking.

Abstract: A method of packaging by heat sealing, including: a) transporting films to a heat sealing packaging station; b) pressing two layers of the films with a positioning blocking element to position the films and block the air flow between a packaging cavity and a packaging line; c) performing heat sealing to the two layers of the films at the packaging line by a heat sealing device; and d) resetting the heat sealing device and the positioning blocking element, and cooling and solidifying the films bonded at the packaging line.

Abstract: A method of packaging by heat sealing, including: a) transporting films to a heat sealing packaging station; b) pressing two layers of the films with a positioning blocking element to position the films and block the air flow between a packaging cavity and a packaging line; c) performing heat sealing to the two layers of the films at the packaging line by a heat sealing device; and d) resetting the heat sealing device and the positioning blocking element, and cooling and solidifying the films bonded at the packaging line.