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For the various changes of the environment inside and outside the body, the nervous system expresses the information with different firing patterns. The key point of revealing the neural coding mechanism is to analysis the neuronal firing activity. In particular, Spiking and bursting are two most common firing patterns. Relevant researches have demonstrated their remarkable performance on information...
As the applications of micro electronic mechanical system (MEMS) are booming, more and more research and development activities are involved in the MEMS industry. For every new MEMS product with new functions, the manufacturing process will be tailored to cope with the changes. This requires reliability work to ensure the robustness of the new process. Thus, failure analysis plays an important role...
Although nano-particles have attracted extensive studies in material science and technology for decades, how to measure the particle size efficiently and conveniently still remains to be a problem unsolved. In this paper, Si nano-particles prepared by annealing a very thin amorphous Si layer were inspected by atomic force microscopy (AFM) as well as SEM and TEM e-beam techniques. Results extracted...
Based on Meridian system, failure analysis of an advanced process LCD driver IC were conducted using laser voltage probing (LVP) and dynamic laser stimulation (DLS) techniques. The results demonstrate that LVP technique can effectively track cell transmission signal and intensity, and that failed location can be further identified accurately by using DLS technique followed by layout circuit analysis.
This work presents a near-field microwave resonator combining with a micro-channel and cell trappings for detecting biological cells. A hairpin sensor with a high-Q dielectric resonator allows the detection of a small variation of DUT in the micro-channel by measuring the scattering parameters responses at resonance frequencies of around 2.2 GHz. The sensor is a microfluidic device constructed from...
A novel hollow-core fiber (HCF) curvature sensor based on a tapered HCF sandwiched between two single mode fibers (Butterfly-Shape Structure) is proposed and experimentally demonstrated. The collapsed region around the first fusion interface excites the high-order modes, and the butterfly shape couples the high-order modes back into the core and interferes with the fundamental mode in the second fusion...
A novel refractive index (RI) sensor based on an asymmetrical Mach-Zehnder interferometer (MZI) with two different step-like tapers is proposed. The step-like taper is fabricated by fusion splicing two half tapers with an appropriate offset. By further applying offset and discharging to the last fabricated step-like taper of MZI, influence of taper parameters on interference spectrum is investigated...
Although some developments have been achieved in finger vein recognition recently, the image deformation problem has received relatively less attention and still intractable. In this paper, the reason and the harmfulness of this problem are analyzed firstly. And then, a deformable finger vein recognition framework is proposed to deal with this problem, consisting of the improved vein PCA-SIFT feature...
We present the AP16-OL7 database which was released as the training and test data for the oriental language recognition (OLR) challenge on APSIPA 2016. Based on the database, a baseline system was constructed on the basis of the i-vector model. We report the baseline results evaluated in various metrics defined by the AP16-OLR evaluation plan and demonstrate that AP16-OL7 is a reasonable data resource...
The earth-mode traveling wave attenuates when propagating along the cable or overhead line and the high-frequency components attenuate faster than the low-frequency components. Therefore, the ratio between the amplitudes of high-frequency component and low-frequency component decreases monotonously as the fault distance increases. Thus, when a constant value is taken for earth modulus velocity, the...
The traveling wave differential protection is an ideal main protection scheme of VSC-HVDC transmission line which is flexible, reliable and immune to the distributed capacitive current. However, it is seriously influenced by the unbalanced current due to the errors of traveling wave attenuation characteristic, time synchronization and calculating truncation. This unbalanced current would cause protection...
Given that the features of different traditional fault location methods and the widespread use of FTU, a hybrid fault location method based on matrix and impedance method for power distribution systems is proposed in this paper. Firstly, the simulated fault current vector is formed by the FTUs' status and network topology. In this vector, the positive elements correspond to the faulted sections. So...
A single-terminal traveling wave fault location method for VSC-HVDC transmission lines based on S-transform is proposed. S-transform is applied to analyze the amplitude variation of the line-mode fault traveling wave signal on each frequency component. The moments corresponding to the modulus maximums of the high frequency components are exactly the traveling wave arrival times. Combining with the...
With the development of smart distribution network, the distribution system is introduced with a large number of distributed generations (DGs). It becomes an active network that both the load and fault currents flow two-way, which leads to serious impacts on the protection's selectivity and sensitivity. In this paper, by analyzing current characteristics of a typical distribution network with DGs,...
Aiming at massive participation and open access education, Massive Open Online Courses (MOOCs) have attracted millions of learners over the past few years. However, the high dropout rate of learners is considered to be one of the most crucial factors that may hinder the development of MOOCs. To tackle this problem, statistical models have been developed to predict dropout behavior based on learner...
We present the OC16-CE80 Chinese-English mixlingual speech database which was released as a main resource for training, development and test for the Chinese-English mixhngual speech recognition (MixASR-CHEN) challenge on O-COCOSDA 2016. This database consists of 80 hours of speech signals recorded from more than 1,400 speakers, where the utterances are in Chinese but each involves one or several Enghsh...
The current interruption capacity of gas gap can be enhanced by series connecting with vacuum gap in hybrid circuit breaker. For the purpose of compensating the inferior interruption performance of CO2 gas gap, as the substitute for SF6 gas gap, the interruption principle and the dielectric strength recovery process of the series gaps of vacuum gap and CO2 gas gap are studied in this paper. Based...
CO2 gas is a possible substitute for SF6 gas in circuit breaker with relatively superior arc interruption performance. To enhance the interruption capacity of the circuit breaker which employs CO2 gas as its arc interruption dielectric, the interruption principle of the hybrid circuit breaker composed of vacuum interrupter and CO2 gas interrupter is studied. Based on the black-box arc models of hybrid...
By series connected with vacuum circuit breaker, the relatively limited arc-interruption capacity of the gas circuit breaker, which employs CO2 gas as the substitution to SF6 gas, can be compensated to match with or approach to the interruption capacity of SF6 gas circuit breaker. To investigate and optimize the voltage distribution between vacuum gap and CO2 gas gap, the three dimension models of...
Impedance spectroscopy is a very powerful tool to characterize and separate physical processes that can occur simultaneously in any material. For parallel plate capacitors, consideration of the modulus has proven to be very effective to study materials that exhibit a spatial variation in conductivity in the direction of the electric field. This was demonstrated with in-situ impedance measurements...
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