7,669 research outputs found
PrisCrawler: A Relevance Based Crawler for Automated Data Classification from Bulletin Board
Nowadays people realize that it is difficult to find information simply and
quickly on the bulletin boards. In order to solve this problem, people propose
the concept of bulletin board search engine. This paper describes the
priscrawler system, a subsystem of the bulletin board search engine, which can
automatically crawl and add the relevance to the classified attachments of the
bulletin board. Priscrawler utilizes Attachrank algorithm to generate the
relevance between webpages and attachments and then turns bulletin board into
clear classified and associated databases, making the search for attachments
greatly simplified. Moreover, it can effectively reduce the complexity of
pretreatment subsystem and retrieval subsystem and improve the search
precision. We provide experimental results to demonstrate the efficacy of the
priscrawler.Comment: published in GCIS of IEEE WRI '0
Recommended from our members
Highly flexible, foldable, and rollable microsupercapacitors on an ultrathin polyimide substrate with high power density.
The design and functionality of extremely flexible, foldable, and rollable microsupercapacitors (MSCs) with in-plane interdigital electrodes that consist of single-walled carbon nanotube (SWCNT) networks on an ultrathin polyimide substrate are demonstrated through experiments and finite element simulations. The all-solid-state MSCs can be reversibly bent, folded, and rolled purely elastically without degradation of their electrical performance. The simulation results confirm that the deformation in bent, folded, and rolled MSCs is purely elastic. The high power density (1125 W cm-3) and small time constant (1 ms) of the present MSCs are comparable to those of aluminum electrolytic capacitors. The MSCs operate at scan rates of up to 1000 V s-1, are characterized by a volumetric capacitance of 18 F cm-3 and an energy density of 1.6 mWh cm-3, and exhibit superior electrochemical stability with 96% capacity retention even after 100,000 charge/discharge cycles. The developed MSCs demonstrate high potential for integration in flexible and wearable electronic systems
Efficient generation of many-body singlet states of spin-1 bosons in optical superlattices
We propose an efficient stepwise adiabatic merging (SAM) method to generate
many-body singlet states in antiferromagnetic spin-1 bosons in concatenated
optical superlattices with isolated double-well arrays, by adiabatically
ramping up the double-well bias. With an appropriate choice of bias sweeping
rate and magnetic field, the SAM protocol predicts a fidelity as high as 90%
for a sixteen-body singlet state and even higher fidelities for smaller
even-body singlet states. During their evolution, the spin-1 bosons exhibit
interesting squeezing dynamics, manifested by an odd-even oscillation of the
experimentally observable squeezing parameter. The generated many-body singlet
states may find practical applications in precision measurement of magnetic
field gradient and in quantum information processing.Comment: 8 pages, 8 figures, submitted to Phys. Rev.
- …