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The recent years have witnessed great achievements in medical robotic devices, and further challenges will come and need to be conquered for more technically advanced and acceptable medical robotic devices. Magnetic-based approaches are highly promising to provide solutions for the new generation of medical robotic devices, due to the desirable characteristics in the interaction between the human...
A novel dual-band patch antenna based on metamaterial transmission line (TL) with zero refraction characteristic is proposed. The metamaterial TL proposed is constructed by a series capacitive gap between two metal patches combined with a complementary single Archimedean spiral resonator (CSASR) etched in the ground plane. The equivalent circuit model is applied to analyze the proposed antenna. The...
Magnetic based strategies are promising to provide solutions for new medical robotic devices. In this paper, we derive an analytical approach for magnetic flux modeling and calculation of force/torque formulas based on a current model. This work is useful for the magnetic design and interaction analysis of medical devices, e.g. for endoscopic procedures.
Nowadays, the development of traction motors of high speed train require highly to the bearing's performance. Magnetic-fluid bearing, as a new kind bearing with so many advantages we need, has got lots of attention. And the key problems of Magnetic-fluid bearing are lubrication and reliability. In this paper, we focus on the temperature field problems which influence the lubrication performance as...
Single pump flow ripple characteristics associated with its structure had been widely researched. However, dual-pump converging flow ripple characteristics are seldom noticed. This paper aims at investigating the flow ripple properties of dual-pump sources in hydraulic systems. A common algorithm to calculate the sum of two period and piecewise functions with different phase is proposed and the mathematical...
The paper is focused on investigating the stiffness characteristic of a hydraulic assisted turning system in low-floor trams. Equations to illustrate the operating processes of the simplified and the completed systems are presented respectively. Simulation works done in Matlab/Simulinkshow that the throttle valve and damping cylinder will reduce the stiffness of the system. The results also display...
Defending against spam in tagging system is a verychallenging task. This paper presents ReSpam, a novel reputationbased mechanism of defending against tag spam in taggingsystems. In ReSpam, timing behaviors and voting methods areintroduced to defend tag spam. Each user has a global reputationwhich can increase or decrease after some judgement given bythe tagging system. When the system finds that...
Multi-layer lithography machine is one of the crucial equipments in the semiconductor integrated circuit industry. Recently, more and more research interests have been attracted to develop higher precision lithography machine. The error analysis plays an important role in the development of ultra-precision lithography machine. In this paper, the error analysis of six degrees of freedom micro-displacement...
In this paper, the simulink model of the Brushless DC Motor (BLDCM), which's the actuator of the Electro-Mechanical Braking (EMB) system, was established. And then, typical faults of the BLDCM were analyzed. These faults included the faults of the motor, the power transistor, and the Hall sensor. In addition, the detailed theoretical analysis of these faults simulation results and their effect on...
The combined effects of shunt and luminescence coupling on the measurement artifacts of external quantum efficiency (EQE) are modeled and analyzed for the top, middle and bottom subcells of multi-junction solar cells. The measurement artifacts of a Ge bottom cell caused by the combined effects are explained with the models.
Based on the theory of non-convex interval goal programming and the discrete resources ideology, this paper constructs three basic storage resources allocation models, to illustrate the relationship between the aggregate requirement and the gross capability of storage in a group enterprise. Numerical results for the oil country tubular goods (OCTG) of 17 subcompanies of a group oil enterprise, verified...
The spacecraft TT&C resources scheduling (STRS) studies the problem of how to allocating the tracking, telemetry and command (TT&C) resources reasonably and satisfying the various requests of different spacecrafts for TT&C services. This article analyzes the spacecraft TT&C requirements and determines the crucial objects and procedures of STRS activities. The constraints and rules...
Simulation modeling is an increasingly popular and effective tool for analyzing transportation problems that are not amendable to study by other means. For any simulation study, model calibration and validation is a crucial step to obtaining any results from analysis. This paper proposed a systematic, practical procedure for microscopic simulation model calibration and validation. The validity of...
Brand image refers to the set of associations linked to the brand that consumers hold in memory, which is the key driver of brand equity, Because of its complexity, multi-dimensional and situational feature as yet there is no system and model in conformity for the construction of brand image. By now most of the research about brand association focused on consumer goods, while ignored the industry...
Interval number, as a simple description of the uncertain information, is a widely used signal processing tool in many actual programming problems. Therefore, the ordering of interval numbers is the key to solve programming problems. In this paper, based on the structural property of interval numbers, by distinguishing principal indices and secondary indices, we put forward a compound quantitative...
In many real-world topic detection tasks, the process of the topic detection is often interactive, which means the users are likely to interfere the reason process by expressing their preferences. We proposed an algorithm, iOLDA, and the software framework for interactive topic evolution pattern detection based on Latent Dirichlet Allocation (LDA). To abate those topics not interested or related,...
According to a new horizontal moving mechanism called `Side-Wheel Operating Simultaneously', the moving process of the high-speed & high acceleration stacker for starting and accelerating was simulated and analyzed with multi-body system method. The result showed that the stacker is able to accelerate stably and fast with the designed maximum acceleration and speed.
How to effectively locate resources is a very important factor affecting the performance of large distributed environment. Some resource discovery methods have been already proposed, which utilizes Small World phenomena. In this paper, on the base of Kleinberg Small World model, this paper proposes an efficient decentralized construction approach SSWCP (Scalable Small World Construction Protocol),...
Symbols are used in scatterplots to encode data in a way that is appropriate for perception through human visual channels. Color is believed to be the most dominant channel with lightness regarded as the most important one of three color dimensions. We study lightness perception in scatterplots in the context of analytic tasks requiring symbol discrimination. More specifically, we performed an experiment...
Objective: The mathematical model prediction has been widely recognized among many disease forecasting methods. But different models will show out distinct prediction results of different diseases, as well as their occurrence locations. In this study, ARMA, exponential smoothing and seasonal index model were adopted for predicting incidence of Newcastle disease, and evaluating the precision of these...
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