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To take full advantages of Wide Bandgap power semiconductor devices, breakthroughs on power module development are heavily explored nowadays. This paper introduces a 1.2kV SiC half bridge intelligent power module utilizing 80μm flexible epoxy-resin as substrates instead of traditional Direct-bonded Copper, for better thermal-stress management and lower cost. The investigation on the flexible epoxy-resin...
Big data and cloud platform technology continue to develop, making the rapid development of the medical industry, the level of medical electronic higher and higher. Thus, medical data is also more rich mode, incomplete, timing, redundancy characteristics. However, the scientific use of medical data is critical to medical outcomes. In this paper, the characteristics of medical data, the current hotspot...
The stability precision is the key technical factor of optical-electro inertially stabilized platform. Combined with the mechanism of inertially stabilized platform system, the mathematical model of the pitch gimbal of inertially stabilized platform is established. The disturbance impacts of stability precision are analyzed and concluded in this paper. And the expression about how the disturbance...
Jet dispensing is one of the key technologies in LED packaging as the consistency of the dispensed volume can directly affect the LED color and quality. Studying the dynamics of silicone-phosphor during the jet dispensing process is of great value. In this paper, a multi-physical model was developed and verified by the experiments. The silicone-phosphor thread profile during the jet dispensing process...
This paper introduces a type of channel models especially suitable for demanding air interface evaluations like the case in many 5G communication systems will be. The map-based channel model is based on the digital information of the environment and uses a deterministic method to search for the propagation links. Most often used link calculation method is ray-tracing. Also here the examples are covered...
Next Generation Passive Optical Network Stage 2 (NG-PON2) features multiple wavelength channels. Channel bonding combines multiple NG-PON2 wavelength connections in parallel to increase the access network throughput beyond the capacity of a single connection. It enhances the access network peak rate provisioning. Channel bonding is actively studied in the ITU Telecommunication Standardization Sector...
Channel bonding is a key endeavor in the ITU Telecommunication Standardization Sector (ITU-T) to increase the peak rate of the Next Generation Passive Optical Network Stage 2 (NG-PON2) system. It manages several parallel wavelength channels in NG-PON2 as a single link. In this paper, we investigate the NG-PON2 layering structure and propose the sublayer changes to support channel bonding. The problem...
We report a dual-gate nanoribbon-based Ion-sensitive field-effect transistor (NR-ISFET) biosensor system for detection of Cordyceps sinensis's DNA (CorDNA). Direct label-free detection of the CorDNA is achieved by conductance measurements of the NR-ISFET biosensors with both Au and SiO2 as sensing layers. Compared with previous methods for CorDNA detection, the NR-ISFET biosensor demonstrates smaller...
Dynamic spectrum access (DSA) technique has emerged as a fundamental approach to mitigate the spectrum scarcity problem. As a key form of DSA, the government is proposing to release more federal spectrum for sharing with commercial wireless users. However, the flourish of federal-commercial sharing hinges upon how the federal privacy is managed. In current DSA proposals, the sensitive exclusion zone...
We propose a channel bonding system structure and algorithms for 100 Gb/s PON. The algorithms schedule FEC codeword transmission among four 25 Gb/s wavelength channels, and they are demonstrated with high efficiency and low latency.
Advanced power module packaging technology is currently being heavily investigated to take full advantage of Wide Band Gap (WBG) power semiconductor devices. As one of most widely applied power module technologies, intelligent power modules, typically for automotive industries, work well to achieve higher operating frequencies with lower losses by integrating gate driver circuits with power semiconductor...
Wavelength channel bonding coordinates multiple physical interfaces for data transmission between the Passive Optical Network (PON) central office and user side equipments. It provides a high speed logical channel to the user services, and the logical channel capacity is the sum of the rates of the bonded wavelength channels. Wavelength channel bonding gains strong support from operators in designing...
Radio propagation models play a crucial role in realizing effective spectrum sharing. Unlike propagation models that do not use the exact details of terrain, terrain-based propagation models are effective in identifying spatial spectrum sharing opportunities for the secondary users (SUs) around an incumbent user (IU). Unfortunately, terrain-based propagation models, such as the Irregular Terrain Model...
In this paper, we presented a wafer-level encapsulated Thermoresistive Micro Calorimetric Flow (TMCF) sensor with the integrated packaging by using the proprietary InvenSense CMOS MEMS technology. For the nitrogen gas flow from −26m/s to 26m/s, the pulsed operated TMCF sensor (device size = 3.4mm2) under the Constant Temperature Difference (CTD) mode achieved a normalized sensitivity of 112.4μV/(m/s)/mW...
Failure analysis is carried out in an irregular way because failure occurred in different situations with different phenomena. Experiences are usually needed to do failure analysis. When a new failure case occurs, it is difficult to make an effective scheme to implement the failure analysis without experiences. To solve this problem, an analysis method based on reliability physics is proposed in this...
To investigate how PDs influenced by the oil flow speed and temperature in transformer oil, experiments with different PD defect models were carried out and parameters were recorded. Test results shown that the PD properties have significant relevance with the oil flow speed and oil temperature. At a certain temperature, the partial discharge voltage (PDIV) would increase while the maximum PD charges...
In recent years, high-speed railway represented by LanXinXian is gradually deeper into the desert area. As a result, the sand dust is a potential threat to the railway [1]. Lines in the sand-dust environment will cause friction between grain of sand and the surface of insulator, and then the surface become out of flatness, which will makes the surface of the insulator gathered a large number of charge,...
To research the feasibility of applying of frequency domain dielectric spectroscopy method in the state diagnosis of generator insulation condition. Dielectric dissipation factor tanδ and relative dielectric constant of test specimens of generator stator bar of different aging degrees under multi-factor accelerated aging are tested by frequency domain spectroscopy (FDS) method. And the quantitative...
To study the influence of aging on time dielectric spectroscopy, the polarization/depolarization current method in time domain dielectric response technique is used for the aging state of generator insulation. Therefore, a multi-factor test is carried out for stator bars and the polarization/depolarization current is tested for stator bars after different aging time. Meanwhile, the influence of different...
In order to solve power failure caused by high operating temperature, resulting in clamp breakdown on 500kV transmission line, a simplified electric contact calculated model is established to calculate the contact resistance, and a finite element model of clamp electric contact is established in ANSYS. The relation of the maximum temperature of clamp and contact pressure is analyzed, and the temperature...
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