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The power efficiency and performance of fully integrated charge pumps are highly dependent on the types of capacitors used in the pumping stages. A sample but not so well-known circuit technique that can minimize power losses is charge recycling applied to the parasitic capacitors always allocated with the useful capacitors at the core of every pumping stage. This paper discusses the possibility of...
The paper focuses on the management of the e-waste and, based on a comparative analysis of the level of awareness of the danger of the improper disposal of them, in Romania and the Republic of Moldova. The collection of data for the study was based on a distribution of a survey with 19 questions in both countries with 202 and 27 questionnaires in Romania and Republic of Moldova respectively. The results...
In the last decade, Romania began a reorganization process in the municipal solid waste (MSW) sector considering the new EU principles regarding the MSW prevention, reuse and recycling before final disposal. The paper present the results of a comparison of three alternative scenarios for energy recovery (ER) from municipal solid waste in Romania considering landfilling, separate collection, mechanical-biological...
A human-like mobile robotic system for humus production, from earthworms (Eisenia foetida), in urban areas, was developed, built up and tested. The system could be separated in two modules for a better understanding, Software and Hardware. The Software implements a fuzzy control algorithm aimed to keep the best environment conditions inside the humus production zone, an in this way maximize the humus...
NAND flash memory has been used for the data storage of mobile devices, Laptops, and various embedded systems, but requires a garbage collection mechanism due to its erase-before-write characteristic. Garbage collection consists of a series of activities (such as read, write, and erase operations) that usually degrade the lifetime and the performance of NAND-based storage systems. In this paper, we...
Microgrids using renewable energy generators and energy storage are being suggested as a solution to rural electrification for many developing countries, even those with existing transmission / distribution networks. This is being driven by the rapidly falling costs of both solar and energy storage. However, the technology is changing rapidly in this area and existing technical standards often do...
The Industry 4.0 paradigm requires new technologies and methods not only to improve the profitability and the quality of the industrial production and products, but also new strategies to reduce the social and environmental impact of the production process. Many line manufacturing chains unbox and assembly components to create products, but create a large amount of waste that sometimes can't be recycled...
Compute-intensive simulations typically chargesubstantial workloads on an online simulation platform backedby limited computing clusters and storage resources. Some (ormost) of the simulations initiated by users may accompany inputparameters/files that have been already provided by other (orsame) users in the past. Unfortunately, these duplicatesimulations may aggravate the performance of the platform...
An ultra-low power regulated charge pump system based on charge recycling between a tank capacitor and the charge pump output load capacitor is presented. The proposed circuit is implemented using a 55 nm UMC High Voltage CMOS technology with a power supply of 1.2V. Simulation results show a maximum current reduction of about 38% compared to a conventional regulated charge pump system. Rise time until...
This paper briefs the design and analysis of recycling folded cascode amplifier using potential distribution method (PDM). Recycling folded cascode amplifier exhibits improved performance in terms of gain, unity gain frequency, slew rate compared to the conventional folded cascode amplifier. While designing of gain boosting amplifier architectures employing cascode structures, designers often found...
Increasing rate of plastic waste generation all over the world is a great environmental concern due to the non-biodegradability nature of this material. Therefore numerous researches and industries are focusing on how to use these petrochemical-based wastes. Due to their high calorific value, they are considerable sources for energy recovery. Different energy recovery technologies such as pyrolysis,...
The paper presents models and estimation algorithm of the air stream velocities in pneumatic material transport for supervisory and direct control layers of electromagnetic milling system. The algorithm uses redundant measurement system and identifies parameters of the first principle model to increase reliability of the measurements and to give rise of the fault detection system.
The lead-free solders are adopted to avoid lead pollution in the past decades, however, the mechanical behaviors under complex loading are still requires further study. For example, change of environment temperature is one of the hazards affecting the electronics reliability, especially the temperature cycles which will increase the temperature damage rapidly and the working life could be reduced...
The paper presents the application of the linearizing control technique for stabilization of the isopropanol concentration in the ultrasonic nebulization process. The isopropanol concentration has to be kept constant to make the nebulization process more efficient. This is achieved by manipulating the inlet flow rate of a fresh isopropanol-water mixture. Because the content of the vessel is not well-mixed,...
In the milling circuit with an electromagnetic mill, a pneumatic system is used to transport the material and to maintain several parameters of the process. The pneumatic system contains three air inlets with controllable flaps and each inlet stream serves a different purpose, however, they are strongly physically coupled through the rest of the installation. Thus, position of each control flap strongly...
The article presents results of research on evaluation of the quality of material obtained in the milling and classification installation with the electromagnetic mill. Several methods of indirect on-line measurements in the process of separating the recycle stream from the final product stream were investigated. The methods discussed in the paper are moisture content measurements of the milled material...
The process of loose materials grinding is directly dependent on the type of feed and its physical parameters resulting from presence of water in the material. The grinding process in the electromagnetic mill installation is carried out on dry material, using pneumatic transport and classification system with recycle. Preliminary analyses have shown the possibility to significantly improve the product...
The global supply of heavy rare earth magnets can become risky with the rocketing demand of rare earth permanent magnet (PM) machines. This paper focuses on the PM Alternating Current (AC) machines with magnet direct-reuse concept, dedicated to mild hybrid vehicle applications. The designs shall both fulfill all the requirements of the applications and the principle of simple magnet disassembly. Several...
Considering the convenience of third-party recycler, this paper uses the Hotelling competition model and the Stackelberg game to study the recycling competition between a producer and a third-party recycler in the waste electronic and electrical equipment (WEEE) recycling market. Stackelberg game theory is used to study the pricing decisions of recycling of WEEE for producer and third-party recycler...
Waste management is that the tactic of treating solid wastes and offers reasonably solutions for usage things that don't belong to trash. It's regarding but trash bin be used as a valuable resource. Waste management disposes of the merchandise and substances that we simply have use throughout a secure and economical manner. Researchers are finding out waste management for over a century, and for over...
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