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For the effective operation of series input modular systems, it is essential to maintain input voltage sharing (IVS) or keep output voltages/currents constant (OVC/OCC). This paper investigates the steady state performance of the series input multiple outputs (SIMO) system. Based on small signal analysis, the inherent instability mechanism of OVC/OCC control strategies is revealed. Since ensuring...
This paper investigates flyback auxiliary power supply system of the input series modular power electronic converter. Through utilizing the input series output independent (ISOI) structure, a modular auxiliary power supply scheme is proposed. And in order to ensure input voltage sharing (IVS) between each auxiliary power supply module, A novel master slave input voltage sharing control strategy is...
With rapid improvement in information and communication technologies, industrial automation systems are under the revolution. Legacy industrial automation systems lack flexibility and interoperability due to multi-layered architecture. From industrial cyber-physical system point of view, a new system architecture is needed to allow vertical and horizontal integration between all devices and systems...
Shallow trench isolation chemical mechanical polishing (STICMP) technology has been widely applied in the fabrication of ultra large scale integrated (ULSI). In STI-CMP, the defect, topography control, thickness uniformity and so on are all so critical, especially, scratch defect is the major problem. Pad, disk, agglomerated slurry particles and foreign particles are the main sources of the tiny scratch...
Contact temperature sensor is susceptible to environment factors that cause large measurement error in industry or in outfield affecting it's analysis of dynamic characteristics. Then this paper designs a IIR digital filter based on the core of FPGA Spartan-6, using differential equation structure which can be separated by two parts of zero and pole that completes the structure of filter. Zero part...
General linear model (GLM) is a most popularly method of functional magnetic imaging (fMRI) data analysis. The key of this model is how to constitute the design-matrix to model the interesting effects better and separate noises. In this paper, the new general linear convolution model is proposed by introducing dynamic characteristic function as hemodynamic response function for the processing of the...
Effect of electromigration (EM) on microstructural evolution of the Cu/Sn3.0Ag0.5Cu/Cu line-type interconnect was in situ investigated. It is interesting to note that Sn grain orientation was becoming the most crucial factor to dominate the EM behavior of downsizing bumps. When the c-axis of β-Sn grain was parallel to the electron flow direction, a larger EM flux was induced from the cathode toward...
Synchrotron radiation real-time imaging technology was conducted to in situ observe the interfacial reaction in line-type Cu/Sn-9Zn/Ni interconnect under a current density of 2.0 × 104 A/cm2 at 230 °C. The reverse polarity effect in Cu/Sn-9Zn/Ni interconnects undergoing L-S EM was verified by the continuous growth of the intermetallic compound (IMC) layer at the cathode while the thinning of that...
A new dynamic calibration system composed of semiconductor laser, infrared detector and calibrated thermocouple is established to conduct dynamic calibration of K-type thermocouple. The advantage of the system is the application of a laser whose rise time is nanosecond-level. With it, the dynamic calibration of thermocouple can achieve millisecond-level time constant. In the dynamic calibration process,...
Synchrotron radiation real-time imaging technology was conducted to in situ observe the interfacial reaction in line-type Cu/Sn-9Zn/Ni interconnect under a current density of 2.0 × 104 A/cm2 at 230 °C. The reverse polarity effect in Cu/Sn-9Zn/Ni interconnects undergoing L-S EM was verified by the continuous growth of the intermetallic compound (IMC) layer at the cathode while the thinning of that...
In order to eliminate the sensor's dynamic error, a method that improved recursive least squares method is proposed. Gradient descent method is used to generate the initial value of the filter parameters, then the recursive least squares method (RLS) algorithm is used to optimize the parameters. The algorithm is tested and verified on the matlab platform. The time-domain response and frequency domain...
Synchrotron radiation real-time in situ imaging technology was conducted to investigate the interfacial reaction in line-type Cu/Sn-9Zn/Cu interconnect under a current density of 1.2×104 A/cm2 at 250 °C. A reverse polarity effect, i.e., the intermetallic compound (IMC) layer at the cathode grew continuously while that at the anode was restrained, was observed in Cu/Sn-9Zn/Cu interconnects. With increasing...
The relationships between the morphology of Ag3Sn phases and the cooling rate, solder volume and 0.7 wt.% Cu addition into Sn-3.5Ag solder were investigated in this study. The morphology of Ag3Sn phases in the solder joints was greatly affected by the cooling rate. In Sn-3.5Ag/ENEPIG (electroless nickel electroless podium immersion gold) solder joints, large plate-like Ag3Sn phases formed on the interfacial...
The line-type Cu/Sn/Cu and Cu/Sn/Ni interconnects were used to investigate the dissolution of substrates under a current density of 2.0×104 A/cm2 at 150 °C for 50 h, 100 h and 200 h. For comparison, the line-type Cu/Sn/Cu and Cu/Sn/Ni interconnects were also aged at 150 °C for 50h, 100 h and 200 h. According to the experimental results, as the cathodes, no matter Cu or Ni, the dissolution of substrates...
Adaptive codebook makes the codebook-based precoding vectors change adaptively with the channels by including the spatial covariance. However, the large intervals of the long-term (typically 20ms or even longer) feedback often incur a sharp performance loss in high-speed scenarios. In this paper, per-cell codebook design for separately quantizing local channel state information (CSI) and the dynamic...
As a representative of virtual community, online social networks get rapid development, and become the “light spot” of the internet industry. Although online social networks gain rapid development, few researchers pay attention to the disciplinary of online social networks. In order to study the factors that influence the behavior intention of social networking users, a theoretical framework based...
In recent years, the crisis caused by mass incidents occurred from time to time, having strongly affected the social stability. Based on different periods of crisis, leaders should try to reduce the occurrence of mass incidents crisis by using different methods of leadership, changing leadership path and adopting the "five forces" leadership model in order to ensure the overall stability...
In this paper, the inner boundary conditions of a simply supported rectangular Mindlin plate with a finite-length Part-through crack is first obtained. The part-through crack on the plate surface having an arbitrary length and depth is assumed to be open, non-propagating and parallel to one side of the plate. Based on Mindlin plate theory and Hamilton theory, we got the governing equations of motion...
A mutual information registration based on modified simplex optimization method is presented in this paper to improve the speed of medical image registration. For two MRI and PET images, the principal axis method is adopted to achieve the rough registration, and the modified simplex algorithm is employed to implement global search using the mutual information as similarity measure. Results indicate...
In order to realize real-time correction for sensor's dynamic error, a novel test system is designed. In this design, TMS320F2812 DSP is adopted for data acquisition and storage, the dynamic compensation algorithm is used for data processing. In this paper, the dynamic compensation algorithm is based on Particle Swarm Optimization(PSO), with this algorithm a dynamic compensator can be realized without...
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