Abstract: Methods and systems for heavy metal separation and recovery from heavy metal-containing sludge or wastes. The method utilizes ultrasonic treatment assisted acid leaching process to separate and recover different heavy metals from multi metals-containing sludge. The technique can be cost effectively implemented for heavy metal separation and purification processes in the real world at industrial scales.

Abstract: Methods and systems for simulating IP networks. Routing Clusters are formed by grouping routers that are connected directly or indirectly and are running the same routing protocol. Routers that are configured to run more than one routing protocols became Border Routers for routing clusters based on these routing protocols. Routing tables are formed by flooding the routers inside the routing clusters and by flooding routes across routing links by redistribution command.

Abstract: A high efficiency power controller comprising of a driver circuit to convert to direct current (DC) voltage from alternating current (AC) voltage is used for drive solid state lighting (SSL) including light emitting diode (LED) and organic light emitting diode (OLED). The driver circuit is comprises of an AC-DC limited current unit, sensor processor, signal generator, feedback controller and SSL lamp module, which converts the AC supply voltage to a DC voltage by using a negative feedback current and voltage limiting circuit for powering SSL. The invented driver circuit operates at high efficiency with low power consumption. The current and voltage feedback circuit mode from current, voltage, light intensity and thermal temperature for SSL possesses reliable DC power driver without any flash during lighting.