354 research outputs found
Characteristics of the Jinwuwei and Its Relationship to the Xingjun System
No full textThis article analyzes the relationship between the Jinwuwei 金吾衛, which was one of the twelve central guards (Shierwei 十二衛), and the system of the army in the field (Xingjun 行軍), through an examination of Tang period tactical manuals, like Taibaiyin-jing 太白陰経, and the statutes concerning the duties of Jinwuwei contained in Tongdian (通典).The research to date argues that since the main duty of the Jinwuwei was to patrol the capital palace, it was more a security police force than an army regiment. This notion is based on Tangliudian 唐六典, by and large an explanation of various Tang institutions. However, according to Tongdian, the majority of the statutes concerning the duties of Jinwuwei was derived from the Xingjun system as described in the Tang tactical manuals.During the Beizhao 北朝 and Sui-Tang periods, whenever an army in the field was organized, a unit called yuhoujun 虞候軍 was usually formed within it to take charge of reconnaissance and sentry duties during military operations, the same duties entrusted to the Jinwuwei. In other words, the main purpose of the Jinwuwei was to guard the Emperor like a yuhoujun unit, whenever he journeyed away from the capital.The author concludes that the Jinwuwei should be considered essentially a yuhoujun unit within the Shierwei, the army in the field (Xingjun) under the direct command of the Emperor.journal articl
Semantic Search and Visual Exploration of Computational Notebooks
No full textCode search is an important and frequent activity for developers using computational notebooks (e.g., Jupyter). The flexibility of notebooks brings challenges for effective code search, where classic search interfaces for traditional software code may be limited. In this thesis, we propose, NBSearch, a novel system that supports semantic code search in notebook collections and interactive visual exploration of search results. NBSearch leverages advanced machine learning models to enable natural language search queries and intuitive visualizations to present complicated intra- and inter-notebook relationships in the returned results. We developed NBSearch through an iterative participatory design process with two experts from a large software company. We evaluated the models with a series of experiments and the whole system with a controlled user study. The results indicate the feasibility of our analytical pipeline and the effectiveness of NBSearch to support code search in large
notebook collections. As one important aspect of the future directions, the search quality of NBSearch was further improved by
incorporating the impact of markdowns in notebooks, and its performance was evaluated by comparing to the original implementation
High-contrast visualization of upconversion luminescence in mice using time-gating approach
No full textPublished: February 25, 2016Optical imaging through the near-infrared (NIR) window provides deep penetration of light up to several centimeters into biological tissues. Capable of emitting 800 nm luminescence under 980 nm illumination, the recently developed upconversion nanoparticles (UCNPs) suggest a promising optical contrast agent for in vivo bioimaging. However, presently they require high-power lasers to excite when applied to small animals, leading to significant scattering background that limits the detection sensitivity as well as a detrimental thermal effect. In this work, we show that the time-gating approach implementing pulsed illumination from a NIR diode laser and time-delayed imaging synchronized via an optical chopper offers detection sensitivity more than 1 order of magnitude higher than the conventional approach using optical band-pass filters (S/N, 47321/6353 vs 5339/58), when imaging UCNPs injected into Kunming mice. The pulsed laser illumination (70 μs ON in 200 μs period) also reduces the overall thermal accumulation to 35% of that under the continuous-wave mode. Technical details are given on setting up the time-gating unit comprising an optical chopper, a pinhole, and a microscopy eyepiece. Being generally compatible with any camera, this provides a convenient and low cost solution to NIR animal imaging using UCNPs as well as other luminescent probes.Xianlin Zheng, Xingjun Zhu, Yiqing Lu, Jiangbo Zhao, Wei Feng, Guohua Jia, Fan Wang, Fuyou Li, and Dayong Ji
Based on Financial Management Mode of Construction Enterprises Based on Computer Technology
No full text
On Bernstein inequalities for multivariate trigonometric polynomials in ,
No full textsummary:Let be the space of all trigonometric polynomials of degree not greater than with complex coefficients. Arestov extended the result of Bernstein and others and proved that for and . We derive the multivariate version of the result of Golitschek and Lorentz for all trigonometric polynomials (with complex coeffcients) in variables of degree at most
Determinants of China’s Energy Imports: An Empirical Analysis
No full textSustained economic growth in China has triggered a surge of energy imports, especially oil imports. This paper investigates the determinants of China’s energy import demand by using cointegraiton and VECM techniques. The findings suggest that, in the long run, growth of industrial production and expansion of transport sectors affect China’s oil imports, while domestic energy output has a substitution effect. Thus, as the Chinese economy industrializes and the automotive sector expands, China’s oil imports are likely to increase. Though China’s domestic oil production has a substitution effect on imports, its growth is limited due to scarce domestic reserve and high exploration costs. It is anticipated that China will be more dependent on overseas oil supply regardless of the world oil price.Energy consumption, energy imports, China and VECM
Photonic Integration Circuits in China
No full textPhotonic integrated circuits (PICs) technologies in China have made rapid progress in the past decade. In this paper, recent advances and future prospective of PICs in China are introduced and discussed, respectively. More than nine major projects in the field of PICs have been issued. Various material platforms and technologies have been developed to realize photonic integrated devices for many applications focusing on broadband communication, such as optical and wireless network, optical interconnects, and optical coherent communication. Many research achievements and breakthrough have been made under the support of these projects, such as silicon photonics transceiver, InP- based transceiver, and optical and microwave signal processing chips. It can be expected that the PICs technology will be continuously supported in the next five years, since it has been considered as one of the key enabling technologies for supporting several national major assignments and strategies, such as broadband communication, supercomputing and datacenter.National Natural Science Foundation of China [61321063, 61090390, 61522509, 61535012]; National High-Tech Research and Development Program of China [2011AA010303, 2011AA010305]; Thousand Young Talent ProgramSCI(E)[email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected]
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