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Institution

Xi'an Jiaotong University

EducationXi'an, China
About: Xi'an Jiaotong University is a education organization based out in Xi'an, China. It is known for research contribution in the topics: Heat transfer & Dielectric. The organization has 85440 authors who have published 99682 publications receiving 1579683 citations. The organization is also known as: '''Xi'an Jiaotong University''' & Xi'an Jiao Tong University.


Papers
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Journal ArticleDOI
TL;DR: A critical review of the recent advances of organometallic acetylide complexes, dendrimers and polymers as high performance OPL materials of the next generation which can favorably optimize the optical limiting/transparency trade-off issue.
Abstract: Within the scope of nonlinear optics, optical power limiting (OPL) materials are commonly regarded as an important class of compounds which can protect the delicate optical sensors or human eyes from sudden exposure to damaging intense laser beams. Recent efforts have been devoted to developing organometallic acetylide complexes, dendrimers and polymers as high performance OPL materials of the next generation which can favorably optimize the optical limiting/transparency trade-off issue. These metallated materials offer a new avenue towards a new family of highly transparent homo- and heterometallic optical limiters with good solution processability which outperform those of current state-of-the-art visible-light-absorbing competitors such as fullerenes, metalloporphyrins and metallophthalocyanines. This critical review aims to provide a detailed account on the recent advances of these novel OPL chromophores. Their OPL activity was shown to depend strongly on the electronic characters of the aryleneethynylene ligand and transition metal moieties as well as the conjugation chain length of the compounds. Strategies including copolymerization with other transition metals, change of structural geometry, use of a dendritic platform and variation of the type and content of transition metal ions would strongly govern their photophysical behavior and improve the resulting OPL responses. Special emphasis is placed on the structure–OPL response relationships of these organometallic acetylide materials. The research endeavors for realizing practical OPL devices based on these materials have also been presented. This article concludes with perspectives on the current status of the field, as well as opportunities that lie just beyond its frontier (106 references).

299 citations

Journal ArticleDOI
TL;DR: A series of injectable conductive hydrogels based on chitosan-graft-polyaniline (CP) copolymer and oxidized dextran (OD) with "smart" delivery vehicles with electro-responsiveness and pH-responsive properties for triggered and localized release of drugs are designed.

299 citations

Journal ArticleDOI
TL;DR: In this paper, a transition from a mixed pseudocubic and R3c structure to a purely pseudo-cubic structure was observed as x increased with the optimum properties obtained for mixed compositions, where the highest energy densities were achieved for BN15F-BT, due to the enhanced breakdown field strength and large maximum polarization.
Abstract: Lead-free ceramics with high recoverable energy density (Wrec) and energy storage efficiency (η) are attractive for advanced pulsed power capacitors to enable greater miniaturization and integration In this work, dense bismuth ferrite (BF)-based, lead-free 075(Bi1−xNdx)FeO3-025BaTiO3 (BNxF-BT) ceramics and multilayers were fabricated A transition from a mixed pseudocubic and R3c to a purely pseudocubic structure was observed as x increased with the optimum properties obtained for mixed compositions The highest energy densities, W ∼ 41 J cm−3 and Wrec ∼ 182 J cm−3, were achieved for BN15F-BT, due to the enhanced breakdown field strength (BDS ∼ 180 kV cm−1) and large maximum polarization (Pmax ∼ 40 μC cm−2) The multilayers of this composition possessed both a high Wrec of 674 J cm−3 and η of 77% and were stable up to 125 °C Nd doped BF-based ceramics with enhanced BDS and large Wrec are therefore considered promising candidates for lead-free energy storage applications

299 citations

Proceedings ArticleDOI
13 Aug 2012
TL;DR: 3D beamforming is proposed and evaluated, where 60 GHz signals bounce off data center ceilings, thus establishing indirect line-of-sight between any two racks in a data center, thus improving link range and number of concurrent transmissions in the data center.
Abstract: Modern data centers are massive, and support a range of distributed applications across potentially hundreds of server racks. As their utilization and bandwidth needs continue to grow, traditional methods of augmenting bandwidth have proven complex and costly in time and resources. Recent measurements show that data center traffic is often limited by congestion loss caused by short traffic bursts. Thus an attractive alternative to adding physical bandwidth is to augment wired links with wireless links in the 60 GHz band.We address two limitations with current 60 GHz wireless proposals. First, 60 GHz wireless links are limited by line-of-sight, and can be blocked by even small obstacles. Second, even beamforming links leak power, and potential interference will severely limit concurrent transmissions in dense data centers. We propose and evaluate a new wireless primitive for data centers, 3D beamforming, where 60 GHz signals bounce off data center ceilings, thus establishing indirect line-of-sight between any two racks in a data center. We build a small 3D beamforming testbed to demonstrate its ability to address both link blockage and link interference, thus improving link range and number of concurrent transmissions in the data center. In addition, we propose a simple link scheduler and use traffic simulations to show that these 3D links significantly expand wireless capacity compared to their 2D counterparts.

298 citations

Journal ArticleDOI
TL;DR: Sensitivity analyses reveal that interventions, such as intensive contact tracing followed by quarantine and isolation, can effectively reduce the control reproduction number and transmission risk, with the effect of travel restriction of Wuhan on 2019-nCov infection in Beijing being almost equivalent to increasing quarantine by 100-thousand baseline value.
Abstract: English Abstract: Background: Since the emergence of the first pneumonia cases in Wuhan, China, the novel coronavirus (2019-nCov) infection has been quickly spreading out to other provinces and neighbouring countries. Estimation of the basic reproduction number by means of mathematical modelling can be helpful for determining the potential and severity of an outbreak, and providing critical information for identifying the type of disease interventions and intensity. Methods: A deterministic compartmental model was devised based on the clinical progression of the disease, epidemiological status of the individuals, and the intervention measures. Findings: The estimation results based on likelihood and model analysis reveal that the control reproduction number may be as high as 6.47 (95% CI 5.71-7.23). Sensitivity analyses reveal that interventions, such as intensive contact tracing followed by quarantine and isolation, can effectively reduce the control reproduction number and transmission risk, with the effect of travel restriction of Wuhan on 2019-nCov infection in Beijing being almost equivalent to increasing quarantine by 100-thousand baseline value. Interpretation: It is essential to assess how the expensive, resource-intensive measures implemented by the Chinese authorities can contribute to the prevention and control of the 2019-nCov infection, and how long should be maintained. Under the most restrictive measures, the outbreak is expected to peak within two weeks (since January 23rd 2020) with significant low peak value. With travel restriction (no imported exposed individuals to Beijing), the number of infected individuals in 7 days will decrease by 91.14% in Beijing, compared with the scenario of no travel restriction. Mandarin Abstract: 背景:自从中国武汉出现第一例肺炎病例以来,新型冠状病毒(2019-nCov)感染已迅速传播到其他省份和周边国家。通过数学模型估计基本再生数,有助于确定疫情爆发的可能性和严重性,并为确定疾病干预类型和强度提供关键信息。 方法:根据疾病的临床进展,个体的流行病学状况和干预措施,设计确定性的仓室模型。 结果:基于似然函数和模型分析的估计结果表明,控制再生数可能高达6.47(95%CI 5.71-7.23)。敏感性分析显示,密集接触追踪和隔离等干预措施可以有效减少控制再生数和传播风险,武汉封城措施对北京2019-nCov感染的影响几乎等同于增加隔离措施10万的基线值。 解释:必须评估中国当局实施的昂贵,资源密集型措施如何有助于预防和控制2019-nCov感染,以及应维持多长时间。在最严格的措施下,预计疫情将在两周内(自2020年1月23日起)达到峰值,峰值较低。与没有出行限制的情况相比,有了出行限制(即没有输入的潜伏类个体进入北京),北京的7天感染者数量将减少91.14%。

298 citations


Authors

Showing all 86109 results

NameH-indexPapersCitations
Feng Zhang1721278181865
Yang Yang1642704144071
Jian Yang1421818111166
Lei Zhang130231286950
Yang Liu1292506122380
Jian Zhou128300791402
Chao Zhang127311984711
Bin Wang126222674364
Xin Wang121150364930
Bo Wang119290584863
Xuan Zhang119153065398
Jian Liu117209073156
Andrey L. Rogach11757646820
Yadong Yin11543164401
Xin Li114277871389
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
2023306
20221,655
202111,508
202011,183
201910,012
20188,215