12 research outputs found
Studies of the atomization mechanism in a graphite furnace—I. The contents of the gaseous impurities in the furnace and their variations
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Year-End Rush and Career Tournament: Theory and Evidence from Chinese Patent Applications
No full textThis paper proposes a tournament theory to explain the year-end rush phenomenon—the pervasive surge in organizational activities or investments at period-ends. In a multi-period tournament with observable interim performance, lagging contestants exert disproportionately high effort in later periods to catch up. Because the final period is not subject to future catching-up, the marginal return to effort peaks at the end, generating an effort surge. The model predicts a monotonically increasing relationship between a contestant's interim performance rank and the extent of his year-end rush. We test these predictions using data on patent applications across Chinese cities, where official promotion is well-known to follow tournament-style competition. Our results show: (i) a robust year-end patent application surge, and (ii) a monotonic relationship between a city’s rush intensity and its interim performance rank within its province. While China’s patent growth target policy has been criticized for exacerbating year-end rushes and reducing patent quality, we demonstrate that the underlying driver is the bureaucratic tournament; growth targets merely exacerbate it. Additional evidence highlights the role of patent agencies in facilitating patent rush
Analysis on Urban Traffic Network States Evolution Based on Grid Clustering and Wavelet De-noising
No full textInvestigation of the atomization mechanism of copper in a graphite furnace using X-ray photoelectron spectroscopy
No full textHighly flexible all-solid-state supercapacitors based on carbon nanotube/polypyrrole composite films and fibers
No full textFlexible all-solid-state film-shaped supercapacitors in both film and fiber configurations have been fabricated by depositing polypyrrole (PPy) onto freestanding carbon nanotube (CNT) films and also by directly twisting the composite films into thin fibers. These CNT/PPy films and fibers maintain a porous structure in which PPy is coated on individual CNTs as well as their interconnections. The specific capacitance of a solid CNT/PPy composite film supercapacitor reaches 139.2 F g(-1) (27.8 mF cm(-2), 10 mV s(-1)) and 331.4 F g(-1) (5 mV s(-1)) in a solid fiber supercapacitor when directly twisting the CNT/PPy composite film into a fiber, which is attributed to the uniform PPy coating throughout the CNT film and both inside and outside of the fiber. These devices show high stability during 10 000 charge and discharge cycles, and good flexibility under bending and twisting. Our CNT/PPy film and fiber-shaped supercapacitors have many potential applications in flexible electronics and energy storage textiles.National Natural Science Foundation [NSFC 51502267]; China Postdoctoral Science Foundation [2015M582200]SCI(E)[email protected]; [email protected]
The research and rectification on the test of immunity to electromagnetic RF fields for electrical energy meter
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