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This paper proposes a two stage actuator system that consists of a coarse actuator driven by a ball screw with an AC motor (the first stage) and a fine actuator driven by a voice coil motor (the second stage). The proposed actuators are applied to make a wide-bandwidth bilateral control system. The first stage has a wide moving range with a narrow control bandwidth, and the second stage has a narrow...
When visualizing graphs into node-link diagrams, angular resolution is often used as one of the aesthetic criteria measuring the diagram quality in terms of human comprehension. However, angular resolution has not been empirically validated for its relevance to humans. In addition, although many force-directed algorithms have been proposed for automatic graph drawing, performance evaluation of these...
There has recently been a significant growth in interest in determining the mechanical properties of living human cells. Much of this work has centred around the application of the Hertz Contact Stress model to force/displacement curves that are obtained from atomic force microscopy. However, it is widely recognised that the conventional Hertzian approach, that is based upon a linear elastic model...
As an innovation form and a new target of organizational, virtual organization shows its great advantages and vitalities in the network economy increasingly. It can not only enhance the core competitiveness of organization effectively, but also protect the implementation of the core competitiveness strategy in organization forcefully. This paper mainly discusses the inner relation between knowledge...
In this paper, I find that in the corporation governance literatures the research of corporation governance learning is a gap and that the corporate governance is as a learning process. I present the assumption of governance man and a learning theory of the corporation governance. The corporation governance learning is a force not to be ignored, sometime it determine the corporation success or failure,...
In today's global economic integration, the competition of enterprises is the competition of talents. Today is also the era of knowledge economy, the management enterprises is the management of culture and talents. Human resources management (HRM) has a vital role in the development of enterprises. In the HRM of enterprises, enterprise culture should serve as the spirit guidance. Managers should improve...
Confronted with global energy crisis and environmental deterioration, residence regeneration has attracted more and more attention for dealing with the ageing urban residences. On the reference of electromagnetic field theory in physics, the mathematical formula of field force of residence is established. We demonstrate that " field force" F is proportional to "residential Value"...
the focus of knowledge management is Knowledge Sharing (KS). But how to measure KS performance scientifically is not defined. Knowledge capital (KC) is introduced to measure the efficiency & extent of knowledge sharing, by analyzing how KS contribute to three dimensions of KC respectively, and finding three dimensions be "main force"," field force", "drive force"...
University students are very valuable asset of the motherland, and they are the future of motherland, the hope of nation. The identifications of the university students to the motherland, the Chinese nation, Chinese culture and the socialism road of Chinese characteristics are related to the construction of well-to-do society in China and the realization of Chinese Renaissance. The meaning of the...
Driving force of globalization, FDI represents an exceptional opportunity for third world countries to accelerate their development. This study examines the bi-directional connection between FDI and economic growth in Cameroon. The methodology is based on regressions of FDI and Cameroonian GDP for the period (1980 – 2009). The results confirm the positive link between FDI and economic growth. On the...
The practice-based view of truth of Marxist New Philosophy, which opposes to the view of truth of objectivism (namely the view of truth of materialism) in western philosophy, uses the mode of practical thinking and logic of practice as its basic characteristic, and understands the truth-related issues based on practice. As a unity of objectivity and subjectivity, cogniyion and practice, the truth...
As a complex and systematic project, a scientific and reasonable establishment of university systems is an embodiment of the value orientation and the pursuit of beliefs of university administrators, ensuring the implement of university spirits and running ideas as well as the achievement of a university's strategic development. Therefore, how to guarantee sound and well-organized university systems...
A novel device, which looks like a mug, has been proposed for measuring the impedance of human hand. The device is designed to have convenient size and light weight similar to an ordinary coffee mug. It contains a 2-axis inertia sensor to monitor vibration and a small motor to carry an eccentric mass (m=100gr, r=2cm, rpm=600). The centrifugal force due to the rotating mass applies a dynamic force...
This paper is focused on investigating force regulation strategies employed by human central nervous system (CNS). The mechanism responsible for force control is extremely important in people's lives, but not yet well understood. We formulate the general model of force regulation and identify several possible control strategies. An experimental approach is used to determine which of the force control...
A model for the simulation of motoneuron firing behavior and muscle force during sustained constant-force isometric contractions was developed. It provides a non-linear relationship between the excitation to the motoneuron pool of a muscle and the firing behavior of motor units; it implements muscle mechanical changes induced by fatigue and it comprises a feedback loop to maintain the muscle force...
In order to provide natural, biomimetic control to recently developed powered ankle prostheses, we must characterize the impedance of the ankle during ambulation tasks. To this end, a platform robot was developed that can apply an angular perturbation to the ankle during ambulation and simultaneously acquire ground reaction force data. In this study, we detail the design of the platform robot and...
Young's Modulus was measured on the trachea and first three generations of pig airways by compression. A simple and low-cost system for measuring the elastic properties of small bio-materials is presented. The force-displacement measurements have been undertaken on dissected cartilage and trachea mucosa from pig trachea and bronchial segments. Young's Modulus of trachea wall, 1.78±0.51 MPa, is found...
Robotic assistance for rehabilitation and enhancement of human locomotion has become a major goal of biomedical engineers in recent years. While significant progress to this end has been made in the fields of neural interfacing and control systems, little has been done to examine the effects of mechanical assistance on the biomechanics of underlying muscle-tendon systems. Here, we model the effects...
In the presented work, standard and high-density electrocorticographic (ECoG) electrodes were used to record cortical field potentials in three human subjects during a hand posture task requiring the application of specific levels of force during grasping. We show two-class classification accuracies of up to 80% are obtained when classifying between two-finger pinch and whole-hand grasp hand postures...
Quantification of arm stiffness is of great interest for a wide group of different research branches, because modulation of muscular stiffness represents the principal mechanism of motor control of movements. Past literature concentrated efforts in defining different methods to identify multijont hand stiffness, but the required computational burden make them hard to implelement. In the present work...
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