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Coherent anti-Stokes Raman spectroscopy is achieved on microsecond time scale with two frequency combs and a heterodyne detection with a local oscillator. The vibrational transitions reach a signal-to-noise ratio of 1600 with linear concentration dependence.
Energy harvesting techniques have been developed more than a decade and received much attention in realizing long-term energy autonomous microsystems. Many converter topologies and circuit techniques have been reported to effectively convert the harvested energy to usable outputs. In this paper, major green energy sources as well as the equivalent circuits are reviewed. In addition, maximum power...
We present an automatic algorithm for symmetrizing facade layouts. Our method symmetrizes a given facade layout while minimally modifying the original layout. Based on the principles of symmetry in urban design, we formulate the problem of facade layout symmetrization as an optimization problem. Our system further enhances the regularity of the final layout by redistributing and aligning boxes in...
Nowadays, increasing amount of parts and sub-assemblies are publicly available, which can be used directly for product development instead of creating from scratch. In this paper, we propose an interactive design framework for efficient and smart assembly modeling, in order to improve the design efficiency. Our approach is based on a probabilistic reasoning. Given a collection of industrial assemblies,...
In this paper, a quasi-self-complementary antenna (QSCA) for multifunctional (i.e., wideband and dual-band wireless local area network (WLAN)) applications is presented. The proposed antenna consists of a pie-shaped radiating patch fed by a 50-Ω microstrip line and its complementary metal structure connected to the ground plane. With properly adjusting the angle (θ) of the pie-shaped notch and the...
A spherical conductive particle immersed in a uniform electric field acquires a charge distribution that displays odd symmetry with respect to the equatorial plane perpendicular to the applied field, while the internal field exhibits even symmetry. This configuration in symmetry is preserved in metal particles for a large intensity applied field, owing to the abundance in electrons. In extrinsic semiconductor...
This work proposes a planar LTE/WWAN monopole antenna fed by a T-shaped strip to obtain eight-band operation for 4G tablet computers. The impedance bandwidths across dual operating bands approach 298 / 1153 MHz at the LTE / WWAN bands, respectively. The proposed planar monopole antenna has the antenna size of only 35 × 10 × 0.8 mm3. The measured peak gains and antenna efficiencies are approximately...
In this paper we have simulated an in vitro lung cancer microenvironment by dielectrophoresis (DEP) patterning. Heterogeneous cells were patterned on the glass substrate, above which a microfluidic gradient is integrated to generate different concentration of target therapy drug (Iressa). Taking advantage of DEP pattern and microfluidic gradient, we designed a biochip to mimic the in vivo conditions...
With the help of the strong nonlinear optical response in silicon nanophotonic wire waveguides complex sources and devices can be integrated on a chip. We demonstrate mid-infrared wavelength translators and frequency combs Furthermore, we open up the possibility for the integration of nonlinear optical functions at telecom wavelengths by exploiting more exotic nonlinear interactions in silicon waveguides...
In this paper, a new type of high precision double buffered MEMS acceleration seismometer is introduced. The MEMS sensor technology, £ — delta 24 bits A/D conversion technology are adopted in our method. Furthermore, FPGA extended SDRAM is utilized for the implementation. Experiments show that the detector performance compared with France's DSU3 Sercel co, frequency response reaches 0–784Hz; Power...
For the multisensor linear discrete time-invariant systems with correlated noises, a reduced dimension weighted measurement fusion algorithm is presented. Furthermore, an optimal reduced dimension weighted measurement fusion white noise deconvolution estimator is given. Its computational burden is greatly reduced. A simulation example for a 3-sensor system with Bernoulli-Gaussian input white noise...
A photo-electron detection system with 32 PIN photodiodes in 1D array has been designed and implemented within 16cm width. There are mainly two parts in this system: the photodiode frontend with weak signal modulation and sampling, the signal processing backend with parallel signal processing and data transfer. The weak current signal of 32 PIN photodiodes' output is first amplified for about 104...
This study focuses on modeling guided waves propagating in bones with a multilayered model to simulate the phenomenon of osteoporosis. Double layer bone phantoms with a layer of water simulating soft tissue are used to discuss the dispersion relation of guided waves. The theoretical model is based on recursive asymptotic stiffness matrix method. A laser ultrasound technique is used to measure the...
With the development of Integrated Circuit (IC) process, the power of a chip increases dramatically. To improve the power and temperature characteristics of a chip, the method that reduces power by increasing delay is presented in the paper based on the electro-thermal coupling among power, temperature and delay by taking repeater heat transfer effect into consideration. Optimized interconnect length...
In this paper, an ultra-wideband (UWB) monopole antenna preventing interference from worldwide interoperability for microwave access (WiMAX), C-band, and wireless local area network (WLAN) systems is presented. The proposed antenna has an octagonal radiating patch with an H-shaped slot embedded. The required dual band-rejected properties can be simply obtained by adjusting the parameters of the H-shaped...
By introducing the fractional-order difference into the updating formulas of the velocity and position, fractional-order particle swarm optimization algorithm is proposed. The effects on the convergence rate and accuracy are analyzed, by introducing fractional-orders in the updating formulas for the velocity and position. Moreover, the linear increasing methods to adjust the fractional-orders are...
In tomosynthesis imaging, two kinds of metal artifacts will influence diagnosis: undershooting and ripple. In this paper we propose a novel metal artifact reduction (MAR) algorithm to reduce the both of these effects. First, the raw projection data are analyzed and metal areas are identified through segmentation. Then the metal areas are filled with an interpolated value based on the neighborhood...
To reduce the amount of computation time between tools and blank models in five-axis CNC machining process simulation, this paper presented a new cutting algorithm using improved Voxel model and tool revolving body. This algorithm is simple and clear with reliable calculation rate. By using the improved Voxel model, this paper showed a way to solve the problems that the classic voxel model cost too...
A mid-infrared octave spanning frequency comb is generated in a silicon waveguide. By beating the generated comb on a photodetector with a narrow linewidth lightsource the linewidth of the lines is measured to be <100kHz.
This paper proposes parallel and distributed algorithms for solving very large-scale sparse optimization problems on computer clusters and clouds. Modern datasets usually have a large number of features or training samples, and they are usually stored in a distributed manner. Motivated by the need of solving sparse optimization problems with large datasets, we propose two approaches including (i)...
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