The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The ship deformation is an inevitable and severe problem for surface ships, especially when the ship is large or the sea condition is rough. Moreover, the positioning or detecting precision of the shipboard equipment will significantly decreases due to the ship deformation. So it is of great significance that estimating the ship deformation angle and restraining its effect in practice. Since ship...
The paper aims to analyze related requirements of community health performance management, build the business model of performance management and provide references for the subsequent development of performance management information system. It applies literature research, current situation investigation, in-depth interviews, key success factors (KSF) and other analysis methods to identify core needs...
In deep lunar soil sampling, the drilling mechanism is driven by the loading wire rope through a driving mechanism. This paper is aimed at establishing an accurate dynamic model of the removable loading wire rope and analyzing its influence on the drilling process. In the process of drilling, there exists material transportation at the boundaries, so the length and mass of the upper and lower wire...
Police patrol district design presents a multi-objective optimization problem with two goals: minimizing workload variation between patrol districts and minimizing the response time for officers responding to calls for service. We evaluate three different methods for scoring district designs: a closed form probability based approach, a discrete-event simulation based on hypercube models for spatial...
Hodgkin-Huxley(HH) equation is a classical model in electrophysiology and has been studied by many scholars. Applying stability theory, and taking maximal sodium conductance gna and potassium conductance gk as variables, in this study we analyze the stability and bifurcations of the model. Bifurcations are found when the variables change, and bifurcation points and boundary are calculated. When gna...
Interference is one of key factors of performance degradation in wireless communications. Various interference models have been proposed in the literature. However, most of them did not take node mobility into account. In fact, as an interferer approaches a carrier sensing range due to node mobility, the transmitted frame may also encounter a collision. Due to the interfering source, it is necessary...
In order to research the attitude algorithm with angular rate input under the conical motion, a optimal three-sample rotation vector algorithm based on single-step Newton backward interpolation is proposed. Using the principle of limited rigid body rotation and the characteristic of angular rate input, three-sample rotation vector algorithm is derivated. To minimum attitude errors, three-sample rotation...
Autopilot is an important part of aircraft, for the flight parameters of aircraft Changing in a wide range, on the basic of analyzing the typical trajectory, the trajectory of feature points were selected, taking pitch control loop for example, a sub- PID autopilot was designed using classical control theory, using single-mode Transient suppression method, the overload due to control surface transition...
Due to the complexity of structure as well electromagnetic coupling, accurate calculation of self and mutual inductances of stator and rotor windings for doubly fed brushless machine (DFBM) with cage rotor is difficult which is likely to lead to inaccuracy in performance analysis. In this paper, a method of parameter calculation and performance simulation based on combined magnetic field analysis...
Oversampling is a widely applied sampling method in default risk modeling. Although arbitrarily increased portions of the defaulted in sampling makes logistic estimation more efficiently, it will bring biased estimation results at the same time. We present a simple Bayesian analysis method to derive the offset logistic modeling to correct oversampling bias. It is pointed out that the real value of...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.