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A new “heatsink-less” LED based T8 retrofit design is proposed in this study. The lamp consisted of light emitting elements directly attached on a flexible substrate. The substrate is mount on to the inner wall of a full cylindrical glass tube. The design is intended to simplify the lamp construction. However, since the metal-based heat sink is eliminated, the thermal design is a concern. Finite element...
In this paper, a quick and efficient approach is proposed to estimate the in-vivo RF induced heating of small medical implants under MRI procedure. The method is based on scaling the in-vivo incident electric fields. Numerical and experimental studies demonstrate the efficiency and accuracy of the proposed method.
A new “heatsink-less” LED based T8 retrofit design is proposed in this study. The lamp consisted of light emitting elements directly attached on a flexible substrate. The substrate is mount on to the inner wall of a full cylindrical glass tube. The design is intended to simplify the lamp construction. However, since the metal-based heat sink is eliminated, the thermal design is a concern. Finite element...
The heating of orthopedic implants under MRI RF fields were investigated 1.5T and 3T systems. Modeling and experiments were performed on an orthopedic device at different sizes inside an ASTM phantom. It is observed that the induced energy deposition near the device is almost linearly related to the dimension of the orthopedic implants when the device is less than 10 cm in length. Higher temperature...
The building of the SPF animal research centre in Taichang, Jiangshu is reinforced concrete frame structure. The longest beam of the building is 83 meters and the sizes of the beam sections are very large. The beams we called are mass beams. When we design the building construction, we need to think about the influence of the temperature because of the mass concrete. In this paper, using the finite...
A new operation strategy has been proposed to reduce the programming voltage in RESET operation of phase change memory (PCM). The amorphous state generated after first pulse would restrict the current flowing through the phase change materials, increasing the heat efficiency. Thus, the amorphous state in the second pulse would increase. The accumulative amorphous state would cover the bottom electrode...
In this study, the fluidized bed evaporator of natural circulation with different the holdup of solid particle are experimental studied. The holdup of solid particle, pressure fluctuation signals and heat flux are measured. Analyses of chaotic time series on pressure fluctuation signals are conducted to determine the relationship between chaotic characterizations parameter. The values of Kolmogorov...
The Surrounding Analysis Method (SAM) in thermodynamics was founded by professor Chen Guitang of Jilin University. It is a new distinctive course theory system, which is found on the recent knowledge. The SAM is not only due to Professor Chen's long-term teaching experience in thermodynamics, but also due to his thorough study for every classical thermodynamic theory system. The SAM studies the equilibrium...
The electronic industry is moving toward smaller, faster, and cheaper. In the case of CSP or BGA, the components are reducing in pitch and ball size but increasing in package size. Due to the high complexity in design, many components inevitably suffer from warpage at soldering temperature, and consequently result in head-in-pillow (HIP) defect. The symptom of this defect is that the solder ball on...
This paper describes an optimized hardware and software design for the heat meter. It is equipped with the international popular low-power consumption single-chip microcontroller MSP430FW425, temperature sensor Pt1000, impeller flow meter and zero energy-consuming magnetic sensor. They improve the precision and sensitivity of heat measurement. It also concludes the RFID module which has realized the...
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