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Using recycled cathode ray tube (CRT) funnel glass as a substitute for sand contributes to both reducing natural aggregate consumption and the disposal of CRT funnel glass. Currently, most studies have focused on the mechanical and durability properties of mortar or concrete containing CRT glass as fine aggregate. However, the study of the dynamic loadings (e.g., earthquake load, wind load and impact...
For revealing the influences of thermomigration effect (TM) on the creep properties of interconnecting solder joints in electronic packaging industry, the creep behavior of Cu/Sn0.7Cu/Cu solder joints were researched under temperature gradient of 1043°C/cm and isothermal temperature of 100°C(median temperature) with different shear stress, respectively. It is approved that the creep lifetime of the...
BACKGROUNDThe efficacy of methoprene can vary with surface substrates, application methods and environmental conditions. The objectives of the present study were to examine the effects of temperature and grain type on the long‐term persistence and efficacy of methoprene in controlling Rhyzopertha dominica from Guangzhou, China.
RESULTSMethoprene applied at 1 mg kg‐1 caused >90% suppression of...
This paper presents a microsecond, high current pulse generator to drive quantum cascade lasesrs. The driver systems consist of pulse generator; power amplifier; fast switches and constant current supply circuits. The pulse width and pulse repetition rate are varied from 1μs to 100μs and 1 kHz to 2 kHz, respectively. Pulsed peak current could achieve 2.2 ampere. The whole systems are of great value...
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