Subjects: Information Science and Systems Science >> Information Security Technology submitted time 2023-11-23
Abstract： In the online ride-hailing platform, the order dispatch algorithm serves as the infrastructure for providing services to match drivers and passengers, which directly affects the rights and travel experience of drivers and passengers. How to test and ensure the fairness of the order dispatch algorithm is critical to the orderly operation of the online ride-hailing platform and protecting the rights and interests of both drivers and passengers. This paper proposes a non-intrusive fairness test method for online ride-hailing order dispatch algorithms. There is no need to go into the details of the algorithm. Only the scene information and the dispatch results are needed to conduct the algorithm fairness test. This method greatly reduces the calculation cost and can protect corporate confidentiality and user privacy. It first characterizes algorithm fairness through statistical modeling of randomness. Then it uses hypothesis testing methods to verify algorithm fairness, and finally uses zero-knowledge proof technology to build contactless trust. In the study, Didi Chuxing data was used to verify the fairness of the algorithm based on pick-up distance. The experiment verified the feasibility and effectiveness of this method, and demonstrated the potential of this framework for larger-scale and more complete algorithm fairness testing.
Peer Review Status:
Awaiting Review
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-05-18 Cooperative journals: 《计算机应用研究》
Abstract： In order to improve the statistical properties of multipath fading and more accurate description of wireless channel. This paper proposed an improved simulation model based on Monte Carlo method (MCM) for uncorrelated multiple Rayleigh fading channels. Based on the angle of arrival (AOA) , the multipath element (k) is introduced into the new simulation model, which improved the爉ethod of evaluating AOA. Through the simulation analysis of the channel model parameters AOA, k, the number of low frequency oscillator and the mean square error (MSE) , the results show that a pretty good agreement statistical property of the new model and those of the underlying reference model has been observed. Compared with MCM, the new model has a significant improvement in the autocorrelation properties in the same conditions and the MSE is about a quarter of the original. The new method is useful for the design of wireless channel simulator, frequency-selective channel.
Subjects: Materials Science >> Materials Science (General) submitted time 2016-11-04 Cooperative journals: 《金属学报》
Abstract：通过Bridgman定向凝固技术对Al-12%Ni（质量分数）过共晶合金在1~100μm/s的生长速率范围内进行恒速定向凝固以及不同初始生长条件和变速比下的跃迁加速定向凝固实验，获得耦合共晶组织的条件。研究发现，生长速率为1μm/s时，经过一定距离生长后，组织中无单独生长的初生相，获得耦合共晶组织；而当生长速率为2～100μm/s时，初生Al3Ni相领先生长且呈现典型小平面生长特性。跃迁加速实验表明，跃迁加速前的初始组织对最终组织有决定性影响，只有当跃迁前的组织中无单独生长的初生相时，跃迁后才可在较高生长速率下获得耦合共晶组织。同时定向凝固可以有效提高Al-12%Ni合金的强度和塑性，跃迁加速获得的耦合共晶组织延伸率也得到进一步提高。
Hits
Hits
Downloads
Comment