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Structural damage will cause a sudden variation of aircraft's quality, center of gravity and aerodynamic characteristics, as well as the destruction of longitudinal symmetry, thus bringing strong coupling. These pose serious threat to flight security. The present paper studies a kind of damaged aircrafts by presenting the nonlinear 6-DOF model of structural damaged aircraft and analyzing its dynamic...
It is of great importance for service providers to evaluate the impact of inter-cell co-channel interference on the achievable data rate in cellular networks. In this paper, the cumulative distribution function (CDF) of the inter-cell interference factor is derived. On this basis, closed-form expression of the maximum achievable rate subject to the interference from finite planar cells is analyzed...
Relationship management plays a decisive role in Chinese enterprises. In this paper, relationship embeddedness is defined as relationship strength and relationship stability, which can be further divided into relationship sustainability, relationship tightness, relationship integrity, relationship reciprocity and relationship stability. The six external relationship bodies are defined as suppliers,...
Pulmonary nodules are potential manifestation of lung cancer. Accurate segmentation of juxta-vascular nodules and ground glass opacity (GGO) nodules are an important and active area of research in medical image processing. At present, the classical segmentation algorithm of pulmonary nodules can not accurately obtain the boundary information of pulmonary nodules. In order to solve the problem, a new...
With the development of the economy and rapid population growth, the range of contaminated groundwater is getting bigger and bigger. Groundwater pollution has a slow process, and it is not easy to find and difficult to control. Once polluted, it takes more than ten years, sometimes even decades to recover. Groundwater pollution has a close relationship with people's health. This paper mainly discusses...
This paper presents a novel approach for estimating mode shape for participation (MSFP) among areas or main power plants involving inter-area oscillation (IAO) mode, by analyzing power deviation (ΔP) signals. The case study has been carried out on a planning case in East China Power Grid (ECPG). The results indicate that the proposed algorithm is effective, and imply its potential applicability in...
The manipulation and measurement of quantum dynamics are often performed with respect to the spectral properties of the system to be controlled. However, such frequency-domain characteristic were rarely incorporated in the modeling and synthesis, which were usually done in the time domain. This paper proposes a frequency-domain model for a class of open quantum systems in which the control is achieved...
A new electrode coating slag system CaO-CaF2-BaO-TiO2-SiO2 has been designed on the base of existing basic slag system. In view of uniform design method and computer program, the experiments were arranged. Nine to eleven coating composition were taken as independent variables (X1 ∼ X11) which were divided into five levels in all twenty-nine experiments. Deposition efficiency and power consumption...
A 149 tubes simplified physical model is established by reasonable simplified assumed conditions. The basic differential equations of fluid flow and heat-transfer are obtained on the base of the thermodynamic process of superheater heat transfer. Spatial distribution of thermodynamic parameters under steady-state and dynamic working process is achieved directly by simulating the whole superheater...
The worm is still one of the most serious threat to the Network security. The logical worm propagation model could characterize the propagation of Internet worms more exactly, and could be more helpful to carry out the worm protection, detection and suppression technology research. In the initial phase of this paper, a heterogeneous network oriented worm propagation model namely Enhanced-AAWP was...
In view of the present virtual hysteroscopy laparoscopic system problems, combined with various processing algorithms, discussed deeply the key techniques about collision detection, deformation computation, and path planning of virtual hysteroscopy laparoscopy surgery simulator system. Subsequently, these three key techniques involved in the virtual hysteroscopy laparoscopy surgery simulator system...
Microbial biofilms are encountered in a wide variety of applications, especially in wastewater treatment systems. Biofilm dynamics in wastewater treatment has been paid much attention, and the simulation of the biofilm growth has been studied with many approaches in recent years. To simulate the real microbial biofilm growth, this paper proposed the confined diffusion limited aggregation (DLA) models...
To reveal the migration and transformation rule of nitrogen in the vadose zone and groundwater and to determine the migration mathematical model, we researched the migration and transformation rule of ammonia nitrogen, nitrate nitrogen, nitrite nitrogen in the vadose zone and groundwater by the soil column leaching experiment. The results indicate: using ammonium bicarbonate shows a stronger alkalinity...
This study explores students' continuance intention in e-learning education system by synthesizing Bhattacherjee's IS continuance theory as basis with the unified theory of acceptance and use of technology (UTAUT), and innovation diffusion theory. The integrated model was empirically tested with 180 bachelor students who had the experience of using the e-learning education system. The results indicate...
In this paper, an dynamics model is established for telerobot. Based on the dynamics model, the authors design a new dual-mode adaptive fuzzy control system and use Lyapunov stability theory to prove the stability of the system and the boundness of tracking error. In order to improve robustness, the dual-mode adaptive fuzzy controller is modified and equipped with self-adjusting and new switching...
Abdominal aortic aneurysm (AAA) rupture is believed to occur when the mechanical stress acting on the wall exceeds the strength of the wall tissue. In endovascular aneurysm repair, a stent-graft in a catheter is released at the aneurysm site to form a new blood vessel and protect the weakened AAA wall from the pulsatile pressure and, hence, possible rupture. In this paper, we propose a framework to...
According to the nonlinearity of the industrial process, it is difficult for traditional predictive control algorithm to establish an accurate mathematical model. In the paper, a two-step predictive control algorithm based on the least square support vector machine (LS-SVM) is proposed. In this algorithm, the nonlinear system is turned into linear system by adding the appropriate intermediate variables...
Cycloid planetary gear plays an important role in precision transmission. Accuracy control of transmission is an extra crucial requirement for design and manufacture. Firstly presented a mathematical approach for precision analysis on cycloid gear, it enable predict mesh stiffness, backlash and angular transmission error with consideration of manufacture tolerance, elastic deformation in cycloid gear...
Arch is a typical complex structure comparing with beam and plate in bridge system. This paper investigates the damage characteristic combining the crack location with the crack intensity in arch. Initially, the first four displacement modes of intact and different damaged arch are simulated and the displacement mode changes are obtained. Next, the wavelet transformation is applied to the displacement...
In this paper, the existence theorem of solutions of initial value problems for nonlinear singular discrete systems with delay have been established by monotone iterative technique combined with the method of upper and lower solutions. Moreover the solution is obtained as limits of monotone sequences. Each member of these sequences is a solution of linear singular discrete systems which can explicitly...
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