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A compact and wideband CPW-fed Quasi-Yagi antenna is proposed and experimentally demonstrated in this paper. Impedance, radiation, and gain characteristics of this antenna are presented, and a prototype antenna is fabricated and measured. The measured impedance bandwidth, defined by −10dB reflection coefficient, can reach an operating bandwidth of 97% from 3.41 to 9.84GHz, over which the antenna exhibits...
There is an explosion in the number of new approaches being developed for extracting information from biological data, creating a need for intelligent ways to utilize so many methods. We take a perspective based on viewing methods as filters which reject undesired data and which may have complementary and redundant performance. We consider approaches for efficiently combining such filters. We provide...
Multimodal brain monitoring is an important approach to gain insight into brain function, modulation, and pathology. We have developed a unique micromachined neural probe capable of real-time continuous monitoring of multiple physiological, biochemical and electrophysiological variables. However, to date, it has only been used in anesthetized animals due to a lack of an appropriate interface for awake...
In this paper we apply techniques for numerical estimation of system resolution from imaging, to the regression problem of relating biological data to phenotypes. Our approach can be viewed as an extension of Backus-Gilbert theory, which attempts to find the most concentrated estimator that may be reliably computed in an inverse problem. Applied to a regression model, we estimate a minimal combination...
Schizophrenia (SZ) is a complex mental disorder associated with genetic variations, brain development and activities, and environmental factors. There is an increasing interest in combining genetic, epigenetic and neuroimaging datasets to explore different level of biomarkers for the correlation and interaction between these diverse factors. Sparse Multi-Canonical Correlation Analysis (sMCCA) is a...
We present a way to observe Spin Hall effect in subwavelength gratings. A spinning evanescent wave can be asymmetrically transformed into propagation waves through one certain diffraction order by a periodical subwavelength grating. By detecting diffraction field distribution behind the grating, we observed spin-dependent diffraction patterns. Furthermore, replacing the periodical grating by a Fibonacci...
Phase change memory (PCM) is a new kind of non-volatile storage. Compared to traditional memory, it has many advantages, such like lower-energy use, higher density and better scalability. PCM is supposed to replace DRAM and become the next generation of memory in embedded systems. However, PCM still has some disadvantages, such as the limitation of writing times. Although some approaches have been...
We report on the development of a body-pitch estimator that uses a hybrid Kalman filter to fuse sensory information from linear potentiometers for lengths, infrared rangers for body pitch and height, and a gyro for pitch rate. The estimator is implemented in a quadruped robot with only two active degrees of freedom and four linear compliant legs. The estimator consists of multiple models that are...
In this paper, we simplify the dynamics of a bounding quadrupedal robot by using a planar and conservative model which has a rigid body and two massless virtual spring legs to separately simulate the effects of the front and hind legs. The quantitative formulation of the model is derived by using the Lagrangian method. We proceed to search for stable operation points in state space, and the local...
Performance evaluation of tracking methods includes methods of relative and absolute performance. Absolute tracking performance is the robust end result presented to a user which determines the product solution for real world analysis. However, to achieve robust performance, the tracking method is subject to the sensor data, filtering performance, and associated models, which requires relative performance...
Urban functional zones refer to areas (or regions) of a city which provide specific urban functions for peoples who lived in the city. The spatial layout of buildings in functional zone show a specific pattern, e.g. residual areas usually have similar builds and the positions of which are highly organized. In this paper, we show that it is possible to identify urban functional zones from a remote...
Compared with traditional linear Synthetic Aperture Radar (SAR), Circular-SAR(CSAR) can achieve 360-degree observation of targets. For this reason, CSAR is the best mode of SAR to exploit target feature extraction on azimuth directions. Over larger azimuth angular extents the energy reflected by targets is, in general, not uniform and most targets exhibit only limited scattering persistence. The algorithm...
Remotely sensed mineralized alteration information is of great significance to geological prospecting and extracting such alteration information in high vegetated areas is difficult. Based on ASTER data, the following processes are performed. First, the ASTER data are geometrically corrected and atmospherically corrected, and water and shadow are masked. Then, principal component analysis method is...
Conventional rotation forest does not consider process dynamics. In order to use process dynamics and nonlinearity for classification, a canonical rotation forest (Canonical RF) is proposed and used for process fault diagnosis. For each time instant, a past vector and a future vector are formed. Canonical variate analysis is used for features extraction to obtain dynamic and uncorrelated features...
In order to realize automatic on-line monitoring of driver fatigue state, an automatic driver fatigue state early warning system based on vision on-line real time detection is established by analyzing driver's eye and mouth states. Firstly, this system use VJ detector algorithm to detect the face, and then in the face region of interest (FROI), MB-LBP feature is used to find the eye region and locate...
Two-stage-riser fluidized catalytic pyrolysis with multiple reaction zones, which can deal with different feedstocks with specific properties, offers better yield of propylene than traditional FCC processes. However, optimal operation of such a process often involves multiple conflicting objectives and requires trade-offs between these different objectives. Hence, a systematic multi-objective optimization...
The paper discusses the slip control problem of a type of deep-sea mining vehicle (DSMV) which is driven by valve controlled hydraulic motors. The dynamics of the DSMV on a slope with a side angle is considered and the mathematical model of relationship between traction force and resistances is established for slip control purpose. A sliding mode control algorithm is proposed to decrease the slip...
A polymer/multi-walled carbon nanotube (MWCNT) composite sensor array based on a flexible polyimide substrate equipped with a thermostatic microheater to provide different working temperatures was developed for gas sensing. The thermostatic microheater provided nine working temperatures ranging from 20°C to 60°C. Each microheater element included a 3 × 3 polymer/MWCNT composite sensor array, which...
A very small antenna for full metal housing tablet that can provide GPS and WLAN 2.4/5.2/5.8 GHz operations is presented. The dimension of the proposed antenna is 6×7 mm2, and it is only 0.03λ at GPS frequency. Antenna size miniaturization and multiband resonances are achieved by combining the monopole antenna self-resonant mode, PCB ground mode and cavity mode with proper excitation and impedance...
To provide timely feedbacks to users, nearly every respectable Internet service now imposes a password strength meter (PSM) upon user registration or password change. It is a rare bit of good news in password research that well-designed PSMs do help improve the strength of user-chosen passwords. However, leading PSMs in the industrial world (e.g., Zxcvbn, KeePSM and NIST PSM) are mainly composed of...
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