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It is important to close the control loop by providing tactile feedback to prosthesis users. An increasing number of researchers attempt to improve grasping performance by providing various types of tactile feedbacks. In our study, we improve the performance by a virtual environment in which subjects acquire two key grasping-related properties, including object's stiffness, economically holding power...
The Lambert W function possesses branches labelled by an index k. The value of W therefore depends upon the value of its argument z and the value of its branch index. Given two branches, labelled n and m, the branch difference is the difference between the two branches, when both are evaluated at the same argument z. It is shown that elementary inverse functions have trivial branch differences, but...
Modern mathematics is becoming more attractive for the education system because of the possibility to adapt its fundamental structures in applications and development of cognitive and creative abilities of the individual. Such subject are related to fractal geometry, which was "revived to life" by B. Mandelbrot beginning with the 70s of XX century. In this paper, we give applications of...
A Bloom filter is a simple space-efficient randomized data structure used to represent set in order to support membership queries. So it is very useful to search the wanted data from the all entries. In this paper, we analyze the probability of the false positive rate of the Bloom filter used in various applications up to now and present the revised false positive rate of Bloom filter.
Quadrature oscillator based on the operational transresistance amplifier (OTRA) is presented in this paper. The proposed quadrature oscillator circuit uses two OTRAs as main active building blocks and a few external passive components to generate the oscillations. The circuit provides independent control over the condition of oscillation and frequency of oscillation. A prototype circuit is implemented...
With the prosperity of the Open Source Software, various software communities are formed and they attract huge amounts of developers to participate in distributed software development. For such software development paradigm, how to evaluate the skills of the developers comprehensively and automatically is critical. However, most of the existing researches assess the developers based on the Implementation...
Inverted pendulum is a nonlinear, multivariable and instability system. In the past, without considering the effects of measurement noise and output noise of the sensor in the processing of inverted pendulum control, the strong random jitter occur, and the control accuracy and stable of the inverted pendulum is reduced. Because the Kalman filter can estimate the signal is corrupted by the noise, the...
The exploration of the mechanism of human behavior becomes very hot and interesting due to its importance and complexity. With the improvement of network technology, online social networks have developed rapidly and changed the traditional way of people's communication. Large amount of data of user behavior is recorded, which gives us an opportunity to study the mechanism of human behavior. In this...
We study the controllability of the linear and nonlinear systems with constant control, where the matrices are continuous, the nonlinear function is a vector function and continuous.
K-12 teachers, especially the ones who teach reading and literacy, are expected to guide their students to read in order to learn. Teachers can promote good reading habits among K-12 readers by offering books that match their interests. Unfortunately, finding the right book for each individual or group of students is not an easy task due to the huge volume of books available these days that cover...
This paper addresses the problem of automated agent-based one-to-many negotiation for multi-issue service pro-curement and presents a robust negotiation mechanism to enhance the procurement process. Software agents represent service sellers and service buyers. Agents are assumed to have goals and constraints when buying and selling services. Automating the service procurement process can provide fast...
Trust is one source of information that has been widely adopted to personalize online services for users, such as in product recommendations. However, trust information is usually very sparse or unavailable for most online systems. To narrow this gap, we propose a principled approach that predicts implicit trust from users' interactions, by extending a well-known trust antecedents framework. Specifically,...
In geometric constraint solving, the constraints are represented with an equation system F(U, X) = 0, where X denotes the unknowns and U denotes a set of parameters. The target solution for X is noted XT. A witness is a couple (UW, XW) such that F(UW, XW) = 0. The witness is not the target solution, but they share the same combinatorial features, even when the witness and the target lie on two distinct...
SEM is a burgeoning multivariate data analysis method. ARMA is one of the most widely used model about time series data. This paper compare the mathematical model about the SEM and ARMA model, and find they are similar. So we can process ARMA model with SEM.
The trust is one of the crucial and important factors for decision making in online social network. In this paper, we compute explicitly the level of trust, distrust and uncertainty between two users using social interactions. The study of social interactions is fundamental to understanding the dynamics of relationships between users and their behaviors in the social network. We use later this formulation...
In this paper, the model of jet dispensing process is developed by decomposing the dispenser into three parts. This model includes all the important system parameters, such as the fluid viscosity, the diameter and length of nozzle and backflow chamber. In this model, the fluid flow is assumed to be steady state flow at each moment. During the whole jetting process, the fluid flow state changes with...
This paper shows the design of a galvanically isolated phase-shifted dc-dc converter. The converter, rated at a power of 1kW and an input current of 50 A, is designed to connect a fuel cell to a 48V dc bus of a UPS system. Special attention is given to the design of the planar transformer, which consists of several stacked PCBs. The copper losses, including skin and proximity effects, as well as the...
Effective category management by grocery stores requires product category evaluation. Previous studies have evaluated product categories using point-of-sales shopping behavior data. Recent developments in radio frequency identificatio technology facilitate the tracking of customer shopping paths within a store and aggregated stay time in sales areas. In addition to radio frequency identificatio data,...
Based on the theory of the Lagrange's method of multipliers, prove the problems of restricting the part of the best restrictive optimization problem needing to the K-T conditions skillfully. This method can avoid the trivial derivation, rely on the superior difficulty knowledge, it is easy to understand and command.
Artificial bee colony algorithm is a new population-based evolutionary method based on the intelligent behavior of honey bee swarm. It has shown more effective than other biological-inspired algorithms. However, there are still insufficiencies in ABC algorithm, which is good at exploration but poor at exploitation and its convergence speed is also an issue in some cases. For these insufficiencies,...
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