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In order to exert the autonomy of Unmanned Aerial Vehicle's(UAV) decision-making, based on fuzzy cognitive map (FCM), UAV's autonomous decision-making model is established. However, when UAV cannot make certain decision because of self-limiting, Manned Aerial Vehicle(MAV) will make intervention. Thus this paper designs three levels of limited intervention collaborative decision-making mechanism. By...
Due to the complex environment conditions, many surveillance videos are captured from cameras which are influenced by shaking more or less. This presents a significant challenge for background-modeling-based video coding since it is difficult to generate good background frames from such shaking videos. To solve this problem, this paper proposes a global motion compensation method using motion vectors...
The difference in statistical scales will bring different statistical results, so it is important and necessary to select statistical grids for the geographical conditions information statistics. This paper proposes a method of selecting statistical scale of geographical information with spatial autocorrelation being taken into account. By using geographic conditions census data and taking building...
Through the research on the evaluation method of bill of quantities valuation mode, we found that the traditional manual review has been completely unable to meet the requirements of listing the bid assessment. Besides, the paper studied on invoicing system, evaluation methods and invoicing software, analyzed the feasibility and necessity of the electronic auxiliary evaluation, expounded the application...
An effective heuristic by using Max-algebra model for solving a blocking flow-shop problem based on dynamic programming is proposed. We establish a Max-algebra model through combining job sequence function and timed D-subsets, and further propose a heuristic based on dynamic programming algorithm. The performance of the heuristic is verified effectively.
Models of quantum effect photo-detector array towards MCM-package is established to systematically study the fatigue life of solder joint under different geometrical sizes, and stress of different material with temperature changed by softwares. Thermal-mechanical simulations are carried out on assembly model in order to positioning SED dissipated in solder joints and carrier during thermal cycles...
Conical twin-screw is a kind of surface body with complex geometric parameters. In order to realize rapid and accurate 3D modeling, according to the generation theory of the screw kinematics, this paper proposes a swept modeling method based on the spiral curve. In the method, the trajectory of spiral curve and the tooth profile section are taken as swept path and primitive respectively. By the vertical...
Salsa20 was proposed by Daniel Bernstein and is one of the finalists of eSTREAM project. Related-cipher attack was introduced by Hongjun Wu in 2002 and applied to block ciphers. The related ciphers can be considered as ciphers with the same round function, but with different round numbers. There has not been any related-cipher attack applied to Salsa20 stream cipher. In this paper, we apply related-cipher...
This paper studied the seismic response characteristics and seismic performance of arch concrete bridge. Nonlinear analysis using three-dimensional analytical model was conducted considering 18 modified ground motions. A linear analysis was applied to observe the dynamic response characteristics for the arch bridge after dampers installed. Finally, the damper location effect on the bridge seismic...
A constant-diameter cam gets its name because the centers of the rollers are a constant distance apart. This paper presents an Accuracy analysis and optimization design method for constant-diameter cam mechanism. Factors affecting the accuracy of cam are studied in the paper. The influences of the roller radial runout, cam machining error and the base circle radius on accuracy are analyzed. Then,...
Based on the “larger probability is priory to pick up” principle in savage attack, the best algorithm with computational complexity of O(n) is given to solve the equivalent problem of (X+K)mod2n and X ⊕ K, which improving the Guess and Determine attack on SNOW1.0 of Hawkes, the data complexity of our attack decrease to 1/32 of Hawkes's and the computational complexity keeps the same as before.
This paper analyzes three factors that impact on the principle point accuracy: the instrument tilt error in the measurement process, the number of sampling points and the scope field of view angle (scope that the sampling points coverage). For the third factor, this paper builds the mathematical model and makes derivation of formula. The result shows that the three factors have different impacts on...
Lots of researches have been done on computer animation of tree swaying in wind. Some of them employed artificial simplification methods which could not achieve faithful swaying motion, others adopted complicated physical principles which would involve vast computation and fail to get an appropriate rendering speed. This paper presents a series of convenient interactive physical based methods for...
The fuzzy system with network structure as the forecasting model, and the improved genetic algorithm is taken to confirm system parameters. A case study of load forecasting in a certain power network shows that the model which is based on this way has a better fitting precision.
Different forecasting methods can lead to very different results in power system load forecast, in order to improve forecasting accuracy, a nonlinear combined forecasting method based on fuzzy adaptive variable weight is introduced. Not only the nonlinearity of electric load forecasting is considered, but also the advantage of variable weight combined forecasting is also utilized. The determination...
This article bases on the commercial bank credit risk research, has a foothold of the bank risk management and proposes the credit risk elements transmission model. The random dynamic transmission chain of the commercial banks credit risk elements transmission under information-based environment is established and given. According to the probability density function of risk elements, how risk elements...
It is important to carry out the economic evaluation for a project before the project investment. However, when risk factors are considered, the crisp traditional method such as Internal Rate of Return (IRR) could be difficult competent for the economic evaluation. In this paper, based on the IRR method, a new model is discussed in order to estimate the random changes of risk elements how to transfer...
Region-based and clustering-based techniques are two of the most important segmentation methods, and both of them have their advantages and disadvantages. In this paper, we present a color image segmentation method combining region-growing with non-parametric clustering technique. First, a bottom-up region-merging technique is used to yield an intermediate result. This procedure takes into account...
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