3,878 research outputs found
WEEE Resource Ecological Compensation Mechanism Design
With the rising awareness of green sustainable development, waste electrical and electronic products (WEEE) resource processing has become a hot issue. Establishing an ecological compensation mechanism is of important to solve the current difficulties in constructing WEEE resource processing. WEEE resource ecological compensations beneficial to alleviate the pressure of WEEE on ecological environment and promote sustainable and coordinated development of WEEE supply chain. The paper aims to improve the ecological compensation system by systematically combing ecological compensation theory and practical experience of ecological compensation mechanism. Taking Shandong Province as an example, WEEE resource ecological compensation mechanism framework from the aspects of compensation subject, compensation object, compensation method and compensation standard is constructed. The guarantee measures for constructing WEEE resource ecological compensation mechanism in Shandong Province are also proposed
Left-Right Asymmetry of Weak Interaction Mass of Polarized Fermions in Flight
The left-right polarization-dependent asymmetry of the weak interaction mass
is investigated. Based on the Standard Model, the calculation shows that the
weak interaction mass of left-handed polarized fermions is always greater than
that of right-handed polarized fermions in flight with the same velocity in any
inertial frame. The asymmetry of the weak interaction mass might be very
important to the investigation of neutrino mass and would have an important
significance for understanding the parity nonconservation in weak interactions.Comment: 8 pages, 2 figures, corrected calculatio
Efficient spin-current injection in single-molecule magnet junctions
We study theoretically spin transport through a single-molecule magnet (SMM)
in the sequential and cotunneling regimes, where the SMM is weakly coupled to
one ferromagnetic and one normalmetallic leads. By a master-equation approach,
it is found that the spin polarization injected from the ferromagnetic lead is
amplified and highly polarized spin-current can be generated, due to the
exchange coupling between the transport electron and the anisotropic spin of
the SMM. Moreover, the spin-current polarization can be tuned by the gate or
bias voltage, and thus an efficient spin injection device based on the SMM is
proposed in molecular spintronics.Comment: 4 figure
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