4 results about "Research Object" patented technology

A system and method for managing clinical research trials is disclosed. The system and method may include a centralized secure database with information on clinical research trial participants, clinical research trial events, investigator and administrator inputs, and communication of participants, investigators and administrators. In one embodiment, the system and method allows investigators to contact participants without disclosing confidential contact information of the participants to the investigators by storing health information and contact information in separate databases. In one embodiment, administrators may access clinical research trial information through a secure web portal.

The invention discloses an aero-engine turbine blade reliability evaluation method based on fracture mechanics. The method comprises the following steps: S1, establishing a simplified model of a bladesection by taking a turbine blade as a research object, calculating a stress intensity factor of the turbine blade containing an initial I-type crack at a blade root by applying a finite element method, substituting the stress intensity factor into a shape factor calculation formula, and determining a shape factor parameter; S2, establishing a turbine blade reliability model based on the generalized stress intensity interference model; and S3, establishing a probability density function of load and fracture toughness, establishing a probability life model and a reliability model for the bladein combination with a Paris formula, and solving the model to obtain the change condition of the reliability of the turbine blade along with the life. According to the method, initial defects existing in the blade are considered, on the basis of the initial defects, the crack propagation life of the I-shaped cracks on the surface of the blade under the cyclic load is established, and life prediction and reliability evaluation of the blade can be more accurate.

The invention discloses a multi-objective evaluation method of calming designs of an open campus. The method comprises the following steps: 1) collecting traffic data of a campus inside and outside based on the to-be-opened campus, wherein the traffic data include vehicle driving speed and queuing-up time; 2) carrying out simulation experiment, wherein traffic simulation software VISSIM is utilized to simulate traffic conditions before and after campus opening on the basis of the traffic data of the campus inside and outside of the research object; 3) evaluating passage efficiency, social environmental benefits and economic benefits according to simulation experiment: and 4) traversing all calming schemes to evaluate feasibility of the design schemes, and selecting a scheme with highest utility from feasible schemes. According to the method of the invention, "the passage efficiency, the environmental benefits and the economic benefits" are comprehensively considered, multi-objective evaluation is carried out, evaluation on the design schemes has comprehensiveness and effectiveness, and an evaluation result has authoritativeness.