Driving behavior modeling is very important in the research area of road traffic systems safety analysis. The characteristics of action of recovering from erroneous driving condition underlying road traffic accident o...Driving behavior modeling is very important in the research area of road traffic systems safety analysis. The characteristics of action of recovering from erroneous driving condition underlying road traffic accident or incident scenarios is quantitatively analyzed, the model of action of recovering from erroneous driving condition is set up according to the identification of erroneous driving condition and the measurement of correction from erroneous driving condition. And then, the probability of action of recovering from erroneous driving condition has been measured based on a revised decision tree. The measure process uses a combination of test data and subjective judgments of driving behavior. It can provide a very helpful theoretical basis for the further analysis of driving behavior in road traffic system.展开更多
The autonomous navigation of an electric vehicle requires the implementation of a number of sensors and actuators intended to inform it about his environment or his position and velocity and deliver necessary inputs. ...The autonomous navigation of an electric vehicle requires the implementation of a number of sensors and actuators intended to inform it about his environment or his position and velocity and deliver necessary inputs. That＇s why it is important to detect and locate sensor and actuator faults as soon as possible to enable the operator to run the vehicle in degraded mode or use the fault tolerant control system if it exists. The main purpose of this paper deals with sensors or actuators faults diagnosis of autonomous vehicle. A diagnosis method using a nonlinear model of the vehicle is developed. Nonlinear state space model of the autonomous electric vehicle is used with the method of nonlinear analytical redundancy to detect and to isolate faults occurred on sensors or actuators. Computer simulations are carried out to verify the effectiveness of the method.展开更多
We present a quantum secret sharing protocol against collective-amplitude-damping noise. Each logical qubit is encoded in two qubit noiseless states. So it can function over such a noisy channel. The two agents encode...We present a quantum secret sharing protocol against collective-amplitude-damping noise. Each logical qubit is encoded in two qubit noiseless states. So it can function over such a noisy channel. The two agents encode their messages on each logical qubit only by performing a permutation operation on two physical qubits. Although each logical qubit received by each agent only carries a bit of information, the boss Alice can read out her agents' information by discriminating two orthogonal states by performing single-qubit measurements assisted by local operation and classical communication (LOCC).展开更多
Objective To study the relationship between severity of skeletal Class Ⅲ malocclusion and the patient's emotional status, as well as motivation for seeking surgical correction and satisfaction with the outcome o...Objective To study the relationship between severity of skeletal Class Ⅲ malocclusion and the patient's emotional status, as well as motivation for seeking surgical correction and satisfaction with the outcome of the surgery Methods One hundred and forty consecutive Chinese patients with skeletal Class Ⅲ malocclusion who had been treated with a combined orthodontic and surgical approach were studied Sixty seven percent (40 males and 54 females) responded to a questionnaire Fifty four percent had two jaw deformities, 32% mandibular hyperplasia and 14% maxillary hypoplasia Surgical procedures: 77% received two jaw surgeries, 15% maxillary advancement and 8% mandibular setback This was a retrospective study based on questionnaires with numerical scale ranked answers (0: not at all; 1: a little; 2: moderately; 3: quite a bit; and 4: extremely) Results ANB angle was significantly negatively correlated with feelings about the nickname related to their facial problems (embarrassment: r =-0 30, P <0 01; worn out r =-0 32, P <0 01; angry r = -0 24, P <0 05) ANB angle also had a significant negative correlation with the reasons for having the surgery (pressure from their friends: r =-0 21, P <0 05, and referred by physician: r =-0 24, P <0 05) Changes in life style as a result of surgery were significantly negatively correlated with the ANB angle before treatment, positive influence on relationships with the opposite sex ( r =-0 25, P <0 05), positive influence in social activiies ( r =-0 22, P <0 05) Conclusion The psychological status before surgery and the outcome following orthognathic surgery in patients with skeletal Class Ⅲ malocclusion were closely related to severity of the malocclusion展开更多
文摘Driving behavior modeling is very important in the research area of road traffic systems safety analysis. The characteristics of action of recovering from erroneous driving condition underlying road traffic accident or incident scenarios is quantitatively analyzed, the model of action of recovering from erroneous driving condition is set up according to the identification of erroneous driving condition and the measurement of correction from erroneous driving condition. And then, the probability of action of recovering from erroneous driving condition has been measured based on a revised decision tree. The measure process uses a combination of test data and subjective judgments of driving behavior. It can provide a very helpful theoretical basis for the further analysis of driving behavior in road traffic system.
文摘The autonomous navigation of an electric vehicle requires the implementation of a number of sensors and actuators intended to inform it about his environment or his position and velocity and deliver necessary inputs. That＇s why it is important to detect and locate sensor and actuator faults as soon as possible to enable the operator to run the vehicle in degraded mode or use the fault tolerant control system if it exists. The main purpose of this paper deals with sensors or actuators faults diagnosis of autonomous vehicle. A diagnosis method using a nonlinear model of the vehicle is developed. Nonlinear state space model of the autonomous electric vehicle is used with the method of nonlinear analytical redundancy to detect and to isolate faults occurred on sensors or actuators. Computer simulations are carried out to verify the effectiveness of the method.
基金supported by the National High Technology Research and Development Program of China (Grant No. 2009AA01Z441)the National Basic Research Program of China (Grant No. 2007CB311100)+3 种基金the National Natural Science Foundation of China (Grant Nos. 60873191,60821001 and 61003290)the Specialized Research Fund for the Doctoral Program of Higher Education (Grant Nos. 20091103120014 and 2009000-5110010)Beijing Natural Science Foundation (Grant Nos. 1093015 and1102004)the ISN Open Foundation
文摘We present a quantum secret sharing protocol against collective-amplitude-damping noise. Each logical qubit is encoded in two qubit noiseless states. So it can function over such a noisy channel. The two agents encode their messages on each logical qubit only by performing a permutation operation on two physical qubits. Although each logical qubit received by each agent only carries a bit of information, the boss Alice can read out her agents' information by discriminating two orthogonal states by performing single-qubit measurements assisted by local operation and classical communication (LOCC).
文摘Objective To study the relationship between severity of skeletal Class Ⅲ malocclusion and the patient's emotional status, as well as motivation for seeking surgical correction and satisfaction with the outcome of the surgery Methods One hundred and forty consecutive Chinese patients with skeletal Class Ⅲ malocclusion who had been treated with a combined orthodontic and surgical approach were studied Sixty seven percent (40 males and 54 females) responded to a questionnaire Fifty four percent had two jaw deformities, 32% mandibular hyperplasia and 14% maxillary hypoplasia Surgical procedures: 77% received two jaw surgeries, 15% maxillary advancement and 8% mandibular setback This was a retrospective study based on questionnaires with numerical scale ranked answers (0: not at all; 1: a little; 2: moderately; 3: quite a bit; and 4: extremely) Results ANB angle was significantly negatively correlated with feelings about the nickname related to their facial problems (embarrassment: r =-0 30, P <0 01; worn out r =-0 32, P <0 01; angry r = -0 24, P <0 05) ANB angle also had a significant negative correlation with the reasons for having the surgery (pressure from their friends: r =-0 21, P <0 05, and referred by physician: r =-0 24, P <0 05) Changes in life style as a result of surgery were significantly negatively correlated with the ANB angle before treatment, positive influence on relationships with the opposite sex ( r =-0 25, P <0 05), positive influence in social activiies ( r =-0 22, P <0 05) Conclusion The psychological status before surgery and the outcome following orthognathic surgery in patients with skeletal Class Ⅲ malocclusion were closely related to severity of the malocclusion
