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LED with many advantages such as high brightness, long-lifetime, and energy-saving has been successfully applied to various fields, especially on special lighting applications. At low temperatures, LED is more uniform in illumination and has a higher luminous efficiency, which is regarded as the next generation refrigeration system lighting. As well as in some cold regions, LED has also become the...
In order to improve the thermal fatigue lifetime of Package-on-Package (PoP), this paper taking PoP thermal reliability the cost and rework into consideration, different edge bonding structure (i.e. 100% edge bonding, 50% edge bonding, and 10% edge bonding) are used to improve thermal reliability. At the same time, the effect of different edge bonding patterns (i.e. only the bottom packege, or both...
LED with the advantages of high brightness, long-lifetime, energy-saving and environmental protection is widely used in varieties of fields especially the lighting industry. Thermal performance is the key to high power LED lighting integration, which has got broad concern and research. And the thermal management and thermal reliability has been improved quickly in recent years. While, more and more...
Bacillus subtilis (B. subtilis) is a kind of Gram positive bacteria possessing multiple enzyme systems, which might be useful in wastewater treatment. In this paper, in order to confirm whether Bacillus subtilis BS7.29, a novel strain isolated from soil in our previous work, could be applied in the wastewater treatment, its effects on assimilation of ammonium, transformation of nitrite, and degradation...
Micro extrinsic Fabry-Perot interferometric (MEFPI) sensors are fabricated by chemically etching Er-doped fibers with mixed hydrochloric (HCl) and hydrofluoric (HF) acid and fusion splicing. Compared with MEFPI sensors fabricated by etched single-mode fibers, the sensor performance is greatly improved by the chemical reaction between HCl acid and doped Er2O3. A maximum visibility of ~24 dB is obtained,...
We have experimentally obtained the reflection transfer function of a phononic bandgap nano-crystal including phase information by using a single-quantum-well in a phonon cavity. Our time-domain investigations help to resolve the apparent ldquosuperluminalrdquo paradox.
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