14,929 research outputs found
Wage Increases, Labor Market Integration, and the Lewisian Turning Point: Evidence from Migrant Workers
Labor and Human Capital,
Migration and Labor Mobility in China
China has witnessed the largest labor migration since the reform and opening up policies were implemented. According to the most recent statistics, the total number of rural to urban migrant workers reached 136 million. Migrants are defined as persons who have left out of township for more than 6 months. The migration flow has propelled the economic and societal transition in China through labor productivity enhancement and social restructuring. Accordingly, the Chinese government has improved the migration policies with increasing migration flow and the changes of labor market situations. This report is organized as follows. Section one briefly introduces when and how the migration started by reviewing the history, size and trend, impacts of migration in China and the vulnerability of migrants. Section two reviews the main migration policy changes in the past three decades. Section three illuminates the Lewisian turning point that marks economic development and transitioning in China. Section four discusses the relevance of China’s experiences to other developing economies in terms of economic development and migration policy changes.Migration in China, Labor mobility, Impact of crisis
Controllability Analysis and Degraded Control for a Class of Hexacopters Subject to Rotor Failures
This paper considers the controllability analysis and fault tolerant control
problem for a class of hexacopters. It is shown that the considered hexacopter
is uncontrollable when one rotor fails, even though the hexacopter is
over-actuated and its controllability matrix is row full rank. According to
this, a fault tolerant control strategy is proposed to control a degraded
system, where the yaw states of the considered hexacopter are ignored.
Theoretical analysis indicates that the degraded system is controllable if and
only if the maximum lift of each rotor is greater than a certain value. The
simulation and experiment results on a prototype hexacopter show the
feasibility of our controllability analysis and degraded control strategy.Comment: 21 pages, 7 figures, submitted to Journal of Intelligent & Robotic
System
Determination of mixing angle through decays
We study decays, the quark content of
and the mixing angle of and . We calculate not only the
factorizable contribution in QCD facorization scheme but also the
nonfactorizable hard spectator corrections in QCDF and pQCD approach. We get
consistent result with the experimental data of and
predict the branching ratio of . We suggest two ways
to determine mixing angle . Using the experimental
measured branching ratio of , we can get the
mixing angle with some theoretical uncertainties. We
suggest another way to determine mixing angle using both
of experimental measured decay branching ratios to avoid theoretical uncertainties.Comment: arXiv admin note: substantial text overlap with arXiv:0707.263
Hexaaquacadmium(II) 2,2′-(azinodimethylidyne)dibenzenesulfonate dihydrate
In the title compound, [Cd(H2O)6](C14H10O6N2S2)·2H2O, the complete cation and anion are each generated by crystallographic inversion symmetry. In the crystal structure, the components form a three-dimensional network by way of O—H⋯O and O—H⋯N hydrogen bonds
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