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The use of reliable or at least realistic friction models is a key factor in simulation studies related to antilock brake control systems. In the literature a plethora of strongly nonlinear tyre-road friction models are available. Certain models have singular expressions in the arguments of exponential terms in the vicinity of zero car body velocity though this region has practical significance. Since...
In this paper, we study two dancers' coupled body dynamics when dancing a waltz. A linear inverted pendulum (LIPM) model for biped locomotion is utilized as each dancer's dynamic model, and a balance controller for each dynamic model is introduced. A pair of dancers are then modeled as two spring-damper-connected LIPMs with their respective controllers. Assuming a perfect rhythmic and synchronized...
Technology innovation is the important factor about private enterprise's survival and development. To the private enterprise, the necessity of transformation firstly comes from its own developing requirements. Extensive developing mode which once played leading role in private enterprise hasn't been meet the requirements of economic development. On the other hand, this necessity also comes from market...
Sit to stand is one of the essential physical tasks of normal daily function, it requires coordinated constructions of the muscle of the lower extremities and truck. Specifically, subjects with movement disorder have reported to experience difficulties in rising from a seated position. Based on the captured signals, the angle and angular velocity of the STS, this paper simulate the STS on SimMechanics...
Focuses on the theme of employment effections in service industry, especially in the general service industry, this paper discusses influencing factors and analysis their effections on service industry employment, and makes an empirical analysis between service industry employment and influencing factors with 1990-2008 data of china, the research indicated that the increase of national income level,...
Theory of life cycle in tourist destination put forward by Butler is a kind of theory describing evolution and change in recreation site, based on this theory, feature and law of life cycle at 2 types of representative artificial ecological recreation site in Chengdu, Huanhuaxi Brook and Sansheng Village, are analyzed, interior and exterior factors influencing change of their life cycle are analyzed,...
In this paper, we present a neuromuscular elbow model with both motor unit pool recruitment and Hill-based contraction dynamics. The model builds upon various models reported in the literature and provides a way to quantify force and movement variability in both isometric and non-isometric contractions. The model's accuracy in estimating muscle force variability at low force levels (at less than 20%...
Regulation of cell growth and proliferation has a fundamental role in tissue development, organogenesis, and disease progression. Conserved distribution of the number of sides of cells with a mean value of six was found in a variety of proliferating epithelia. Previous studies have shown that clones of proliferating cells bounded by quiescent cells have fewer sides than normal epithelia. However,...
This paper presents a new identification method for the biomechanical parameters of human tissues for the purpose of improving the accuracy of dynamic organ simulation. We describe the formulation of the method, and also design a robotic system to implement the method using a robotic probe, a medical imaging device, and a numerical simulator for the finite element analysis (FEA). We carried out an...
Advancements in computational techniques have provided the ability to utilize detailed models in surgical training systems. The development of more complicated procedures coupled with reduced training time for medical residents has driven the need for accurate reality-based medical simulators. Extensive research has been conducted in the area of modeling general deformation of biological tissue; however...
Striated muscle represents a unique type of actuator in that it depends on living tissue. Models of muscle have historically focused on the role of actuator, using properties that do not adapt over time. This paper extends the foundation of Hill-based muscle models by considering muscle as a tissue composed of well-mixed composite materials (at the level of fascicle), and identifies three specific...
This paper addresses a diagnostic palpation system based on the measurement of nonlinear elasticity. An indentation probe is used to press against breast tissue. Then, the measured reaction force is used to estimate the parameters of nonlinear elasticity, which enables the identification of tissue type, such as fat, muscle, mammary gland or tumor. Here, we present the basic concept of our study and...
In this paper, we develop a mechanics-based dynamic model for bevel-tip flexible needle insertion into soft tissues. We use Newton-Euler formulation to account for the effect of actuation, friction, tissue interactions, and bevel-tip forces on the needle. The soft tissue deformation is modeled by finite element analysis, whereas the mechanics-based model is used to predict needle deflections due to...
Automated handling of compliant musculoskeleton has been an area of growing interest due to the needs of processing natural products mechanically. Motivated by the interests to understand the effect of bio-structural deformation on the blade location/force in poultry industry where high yield breast meats are harvested at production speed, a dimension-based method is proposed to characterize bio-structural...
Comparison between the organic worm-like chain (WLC) model and inorganic ferroelectric materials is present. The connection between this model and the bioinformatics metric is discussed. Similarity between the Hamiltonians of the WLC model and ferroelectric materials suggested that the evolution of molecular domain boundaries and the domain switching of ferroelectric chevron structures are closed...
In this paper, a simulation model of pedestrian flow based on geographical cellular automata, GCAP Model, is established. The GCAP Model takes the walking suitability of the roads into consideration, and uses six dynamic parameters to simplify tactically the decision-making process of pedestrians in their movements. The simulation results show that the model is quite sensitive to different road conditions...
The design and implementation of an FPGA core that parallelises all the necessary operations to compute the non-bonded interactions in a MD simulation with the purpose of accelarating the LAMMPS MD software is presented in this paper. Our MD processor core com-prised of 4 identical pipelines working independently in parallel to evaluate the non-bonded potentials, forces and virials was implemented...
Factoring plays a crucial role in solving the financing problems, which are common among small and medium enterprises (SMEs). In this paper, we develop decision models by considering non-recourse factoring and recourse factoring respectively in a supply chain which includes a bank and a seller. Then we find the optimal discount rate of factoring in two scenarios. Finally, we study the influence of...
In this paper, multibody system dynamics simulation for manipulators and legged robots with high joint elasticities, particularly with focus on collision modeling, is addressed. We present the architecture of a newly developed toolbox in conjunction with a detailed discussion of a realistic contact, friction and stiction model, which is validated with real measurement data of a bouncing ball. The...
The difference of governance tradition and governance system resulted in the different governance bodies of US and China, which is reflected in the different governance idea, power and system of the two countries. The governance bodies of US shows the strong idea of self-governance, the separation of power, and the diversity and multi-centers in system, while the authority of China believes that the...
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