Schematic Realization Research Articles

A High Efficiency Transmission Architecture for Electric Vehicles

<div class="section abstract"><div class="htmlview paragraph">A Dual Power Split Electronic Continuously Variable Transmission (DPS-ECVT) with an input-split, output coupled, split-power-path configuration is proposed for improving overall system efficiency and range for electric vehicles. By modulating the power split ratio between the mechanical (planetary gear meshes) and electrical (Motor Generator Units) driveline components, a continuous range of gear ratios operating at higher efficiency is obtained. The proposed concept leverages two power-split units that lead to significantly reduced power flow through the electrical drivelines (compared with single speed EV transmissions as well as single power-split E-CVTs) while providing the same overall ratio spread for transmission operation. A multi-layered optimization is performed, first an inner layer optimization on the operational control strategy to maximize the end-of-cycle SOC (State of Charge) of the battery for a given set of transmission design parameters, and then subsequently an outer layer optimization on the design parameters to maximize the overall efficiency over multiple configurations of the given architecture. The performance of the architecture is bench-marked using simulation models derived from a Chevy Bolt baseline that are simulated on the EPA highway (HWFET) and the urban (UDDS) driving cycles. An effective gain of 13.6 percent in the range is demonstrated. A stick-diagram schematic realization of the optimized configuration is also presented.</div></div>

The complexity of Boolean functions in the Reed–Muller polynomials class

This paper considers the problem of transforametion of Boolean functions into canonical polarized polynomials (Reed–Muller polynomials). Two Shannon functions are introduced to estimate the complexity of Boolean functions in the polynomials class under consideration. We propose three Boolean functions of n variables whose complexity (in terms of the number of terms) coincides with value. We investigate the properties of functions and propose their schematic realization on elements AND, XOR, and NAND.

Single-level schematic realization of basic operations of modular arithmetic in unitary codes

Some problems in the schematic realization of basic operations of modular arithmetic (operations of addition and multiplication modulo 5 and modulo 7) for the case of data representation in unitary codes are considered. Single-level logical schemes of modular adders and multipliers synthesized using EXCLUSIVE OR with a threshold are presented. These logical schemes are more efficient (in both complexity and depth) than the existing analogs.

Lanthanide Complexes and Quantum Dots: A Bright Wedding for Resonance Energy Transfer (Eur. J. Inorg. Chem. 21/2008)

AbstractThe cover picture shows the schematic realization of a homogeneous fluoroimmunoassay using Förster resonance energy transfer (FRET) from luminescent lanthanide complexes (LLCs – an example of a Tb complex is shown in the top right corner) to a biocompatible CdSe/ZnS quantum dot (QD). Excitation of the immunocomplex formed by the association of QD‐labeled antibodies, antigen and LLC‐labeled antibodies by UV light (e.g. 315 nm) leads to a long‐lived Tb and QD luminescence (luminescence spectra shown in the bottom right corner) due to FRET sensitization by the LLCs. This new immunoassay approach opens doors to extremely sensitive background‐free fluoroimmunoassays suitable for multiplexing by using several different QDs as FRET acceptors with a single LLC donor. Details are discussed in the Microreview by L. J. Charbonnière and N. Hildebrandt on p. 3241 ff.

Beam-preshaping axicon focusing

An approach to efficient axially symmetric focusing of a light beam to an extended line segment is studied wherein the on-axis intensity and the scale of transverse intensity distribution can be controlled precisely and simultaneously at any point of the segment. Schematic realization is based on employing two phase-only optical components in tandem, the first of which, with a disk form, performs prior central light beam shaping and marginal correction to smooth the edge slopes, while the second one, with an annular form, is used for the appropriate axicon-type focusing of a light beam to the segment. An instance is given of converting a collimated Gaussian laser beam into an oscillation-free nondiffracting zero-order Bessel beam reproduced on a finite interval.

Methods of identifying the parameters of thermophysical objects and their schematic realization

Methods of identifying the thermal diffusivity and thermal activity without loss of integrity and with introduction into the experimental object are considered. Identification schemes based on electrical models with tunable parameters are presented.