The concepts of rock strength intervals are presented in this work,furthermore,central values of intervals and their corresponding credibility are provided using two-case study based on blind data theory and fuzzy int...The concepts of rock strength intervals are presented in this work,furthermore,central values of intervals and their corresponding credibility are provided using two-case study based on blind data theory and fuzzy interval estimation.60 granite specimens are first tested,the compressive strength interval and tensile strength interval are[103.68,219.61]and[7.53,11.86]MPa,while the tested mean values of compressive strength and tensile strength are 152.86 and 10.14 MPa,the credibilities are less than58.4%and around 70.4%,respectively,the credibility of shear strength is between 40%and 60%.Then 70 other rock specimens are designed and tested,the similar conclusions can be reached.The results show that the conventional definite values are the particular values within the intervals,and the credibility of them often fails to reach the high-precision engineering requirement.The results demonstrate the feasibility and application potential of this proposed algorithm for the engineering practice.The references for engineering value selection of rock strength under different credibility or according to frequency distribution of central values are provided to increase the reliability and precision of calculation.展开更多
Discuss the problem of infinite increasing coin list in anonymous E-cash systems, which reduce the efficiency of whole system greatly. Though some methods are suggested, no one can solve the problem with high efficien...Discuss the problem of infinite increasing coin list in anonymous E-cash systems, which reduce the efficiency of whole system greatly. Though some methods are suggested, no one can solve the problem with high efficiency and flexibility. Here, we use the technique of adding information in blind signatures to deal with this problem. Through adding timestamp in signatures, we can separate the valid period of all used coins into pieces. Only the coins in the last stage are recorded. So the scale of the coins list is controlled. We also analyze the anonymity of these data, and add some indispensable restrictions to them. These restrictions can ensure that the imported data don’t break the anonymity of the customers. In order to fulfill these qualifications, we lead to the concept of restricted common data (RCD). Furthermore, we propose two schemes to add RCD in the blind signature. The simple one is easy to implement, while the complex one can note the value of the coin. The usage of RCD leads to little additional cost, as well as maintaining the anonymity of customers. This method fits for most kinds of anonymous E-cash systems.展开更多
基金Project(2011DA105287-MS201605)supported by the State Key Laboratory of Coal Mine Disaster Dynamics and Control,ChinaProject(51374242)supported by the National Natural Science Foundation of ChinaProject(106112016CDJXY240004)supported by the Fundamental Research Funds for the Central Universities,China
文摘The concepts of rock strength intervals are presented in this work,furthermore,central values of intervals and their corresponding credibility are provided using two-case study based on blind data theory and fuzzy interval estimation.60 granite specimens are first tested,the compressive strength interval and tensile strength interval are[103.68,219.61]and[7.53,11.86]MPa,while the tested mean values of compressive strength and tensile strength are 152.86 and 10.14 MPa,the credibilities are less than58.4%and around 70.4%,respectively,the credibility of shear strength is between 40%and 60%.Then 70 other rock specimens are designed and tested,the similar conclusions can be reached.The results show that the conventional definite values are the particular values within the intervals,and the credibility of them often fails to reach the high-precision engineering requirement.The results demonstrate the feasibility and application potential of this proposed algorithm for the engineering practice.The references for engineering value selection of rock strength under different credibility or according to frequency distribution of central values are provided to increase the reliability and precision of calculation.
文摘Discuss the problem of infinite increasing coin list in anonymous E-cash systems, which reduce the efficiency of whole system greatly. Though some methods are suggested, no one can solve the problem with high efficiency and flexibility. Here, we use the technique of adding information in blind signatures to deal with this problem. Through adding timestamp in signatures, we can separate the valid period of all used coins into pieces. Only the coins in the last stage are recorded. So the scale of the coins list is controlled. We also analyze the anonymity of these data, and add some indispensable restrictions to them. These restrictions can ensure that the imported data don’t break the anonymity of the customers. In order to fulfill these qualifications, we lead to the concept of restricted common data (RCD). Furthermore, we propose two schemes to add RCD in the blind signature. The simple one is easy to implement, while the complex one can note the value of the coin. The usage of RCD leads to little additional cost, as well as maintaining the anonymity of customers. This method fits for most kinds of anonymous E-cash systems.
