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The paper presents an agent-based simulation to model supply chains (SCs) and evaluate the bullwhip effect, an important index to measure the stability of SCs, under the stochastic demand and lead time. We carried out a series of numerical experiments to measure the bull whip effects in two scenarios. In the first scenario with a simple 2-tier SC, the results of simulation were obtained and compared...
Supply chain disruptions and risks have been garnering more attention in recent years owing to the occurrence of several high-profile disruptions and many published works acknowledge the increasing vulnerability to disruptions in supply chains. Few, however, explicitly embrace complex systems (CS) approach as a holistic, system-wide perspective towards supply chain risk management (SCRM). This paper...
In this paper, using relative low cost 130nm RFCMOS, a high linearity, SAW-less, LTE transmitter with quadrature passive voltage mixer driven by bootstrapped 25% duty-cycle LO is presented. A tunable LC tank is added between mixer and Pre-PA amplifier (PPA). As the result, requirement on linearity of reconstruction lowpass filter (LPF), mixer and PPA are reduced. The linearity of mixer is further...
A CMOS RF front-end for the Long-Term Evolution (LTE) direct conversion receiver is presented in this paper. With low noise transconductance amplifier (TCA), current commutating passive mixer and transimpedance operational amplifier (TIA), the RF front-end structure enables high-integration, high linearity and simple frequency planning for LTE multi-band applications. Large variable gain is achieved...
The continual advancement and capacity of RFID technology is spurring a wide acceptance and growing interest in various entities in the supply chain. Its benefits, as opposed to the prevalent bar code, are enticing with myriad possibilities envisioned to attaining better operational efficiencies. In an era where product lifecycles and order lead times are ever decreasing and customer demands tenacious,...
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