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Extracting Relevant Terms from Mashup Descriptions for Service Recommendation

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Tsinghua Science and Technology 2017年第3期22卷 293-302页

作者： yang zhong Yushun Fan Department of Automation Tsinghua UniversityBeijing 100084China

Due to the exploding growth in the number of web services, mashup has emerged as a service composition technique to reuse existing services and create new applications with the least amount of effort. Service recommendation is essential to facilitate mashup developers locating desired component services among a large collection of candidates. However, the majority of existing methods utilize service profiles for content matching, not mashup descriptions. This makes them suffer from vocabulary gap and cold-start problem when recommending components for new mashups. In this paper, we propose a two-step approach to generate high-quality service representation from mashup descriptions. The first step employs a linear discriminant function to assign each term with a component service such that a coarse-grained service representation can be derived. In the second step, a novel probabilistic topic model is proposed to extract relevant terms from coarse-grained service representation. Finally, a score function is designed based on the final high-quality representation to determine recommendations. Experiments on a data set from *** show that the proposed model significantly outperforms state-of-the-art methods.

关键词： service recommendation topic model mashup descriptions linear discriminant function

Asymptotic Tail Probability of Randomly Weighted Sums of Dependent Random Variables with Dominated Variation

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Acta Mathematicae Applicatae Sinica 2011年第2期27卷 277-280页

作者： Hai-zhong yang School of Statistics Xi'an University of Finance and Economics Xi'an 710100 China

This paper investigates the asymptotic behavior of tail probability of randomly weighted sums of dependent and real-valued random variables with dominated variation, where the weights form another sequence of nonnegat... 详细信息

关键词： randomly weighted sums tail probability dominated variation

Regulation of sporopollenin synthesis for pollen wall formation in plant

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Science China(Life Sciences) 2016年第12期59卷 1335-1337页

作者： zhong-Nan yang College of life and environmental sciences Shanghai Normal University

Pollen wall is the most complicated cell wall in plant. It is composed of outer exine and inner intine with the exine fiar- ther divided into sexine and nexine. The composition of in- tine layer is generally considered to be same as a plant cell wall which is mainly composed of cellulose. Nexine layer can only be observed under transmission electron microscope. Recent investigation suggested that the major composition of nexine is arabinogalactan proteins （Jia et al., 2015）.

关键词： pollen cellulose outer

Alternaria toxin-induced resistance against rose aphids and olfactory response of aphids to toxin-induced volatiles of rose plants

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2012年第2期13卷 126-135页

作者： Fa-zhong yang Li LI Bin yang Key Laboratory of Forest Disaster Warning and Control in Yunnan Province Southwest Forestry UniversityKunming 650224China

The search for active toxins for managing weeds or plant diseases is believed to be a promising avenue of investigation. However, the effects of Alternaria toxins on insects have just begun to be investigated. Bioactivities of toxins from four strains of Altemaria alternata on Rosa chinensis and rose aphid Macrosiphum rosivorum were tested in the present study. At a concentration of 50.0 pg/ml, the crude extract （toxin） of strain 7484 was found not to be harmful to rose plants with excised leaf-puncture method （P≥0.079）, and rose plants showed enhanced resistance to rose aphids when this Altemaria toxin was sprayed on the plants （P≤0.001）. However, this toxin caused no detrimental effects on aphids in insecticidal bioassay at a concentration of 10.0 to 160.0 μg/ml （P≥0.096）. Therefore, the Alternaria toxin had significantly induced the resistance of rose plants against rose aphids, demonstrating that the resistance mechanism triggered by the Altemaria toxin in the rose plant may also be used by the plant to defend itself against insects. Further bioassays aimed to discover the olfactory responses of aphids to the toxin-induced volatiles of host plants. The aphids were significantly more attracted to both volatiles emitted and collected from control rose plants than to both volatiles emitted and collected from the toxin-treated rose plants （P≤0.014）. This result showed that the toxin-induced resistance related to the volatile changes of host plants.

关键词： Alternaria altemata Macrosiphum rosivorum Rosa chinensis Toxin Plant resistance Olfactory response Volatile Headspace collection

Some Results on Subelliptic Equations

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Acta Mathematica Sinica,English Series 2006年第6期22卷 1695-1704页

作者： Li MA De zhong CHEN yang yang Department of Mathematical Sciences Tsinghua University Beijing 100084 P. R. China

In this paper, we consider the principal on R^n, and we find a comparison principle for such semi-linear sub-elliptic equation in the whole R^n and infinitely many positive solutions of the problem. eigenvalue problem for Hormander＇s Laplacian principal eigenvalues. We also study a related prove that, under a suitable condition, we have

关键词： principal eigenvalue Hormander's Laplacian positive solution

Allogeneic hematopoietic stem cell transplantation in a 3-year-old boy with congenital pyruvate kinase deficiency: A case report

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World Journal of Clinical Cases 2021年第12期9卷 2916-2922页

作者： zhong-yang Ma Xue yang Department of Pediatrics Key Laboratory of Birth Defects and Related Diseases of Women and ChildrenWest China Second University HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND The understanding regarding genetic variation,pathophysiology,and complications associated with pyruvate kinase deficiency(PKD)in red blood cells has been explained largely,and supportive treatment is currently the main management *** managements,including transplantation and genome editing,supplying for substitute dugs of the pyruvate kinase,are all under *** SUMMARY We herein report a 3-year-old boy with severe transfusion-dependent PKD cured by unrelated identical peripheral blood stem cell transplantation(PBSCT).Hemoglobin was corrected to a normal level by gene correction after PBSCT,with no complication related to the *** Hematopoietic stem cell transplantation could be a substitute for transfusiondependent PKD.

关键词： Pyruvate kinase deficiency Transfusions Hematopoietic stem cell transplantation Peripheral blood stem cells Peripheral blood stem cell transplantation Case report

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纤维增强复合材料表面防护涂层的研究进展

涂料工业 2025年第1期55卷 82-88页

作者：陶旭陈旭邹向赵永林杨忠哈尔滨乐普实业有限公司哈尔滨150090 中车青岛四方机车车辆股份有限公司山东青岛266111 上海阿宝实业有限公司上海201408 吉利汽车集团有限公司浙江宁波315336

在纤维增强复合材料表面涂覆一层防护涂层,可赋予其优异的综合性能,提高其使用效率并延长服役寿命。文中首先介绍了纤维增强复合材料的分类、应用和发展方向,轻量、环保、智能化是未来的发展趋势。随后,讨论了纤维增强复合材料表面防护... 详细信息

在纤维增强复合材料表面涂覆一层防护涂层,可赋予其优异的综合性能,提高其使用效率并延长服役寿命。文中首先介绍了纤维增强复合材料的分类、应用和发展方向,轻量、环保、智能化是未来的发展趋势。随后,讨论了纤维增强复合材料表面防护涂层的分类,重点论述了其表面防护涂层的附着力增强策略和方法。进一步论述了交通运输、能源装备等领域中纤维增强复合材料表面防护涂层的开发策略和应用研究现状。最后,针对存在的问题进行总结与展望,明确表面防护涂层的水性化是大势所趋,且涂层的开发将紧密结合性能、成本及环保等指标。

关键词：玻璃纤维碳纤维复合材料涂层表面防护

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On the Index of Finite Determinacy of Vector Fields with Resonances

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Acta Mathematica Sinica,English Series 2008年第8期24卷 1401-1408页

作者： Vincent NAUDOT Jia zhong yang Mathematics Institute University of Warwick Coventry CV4 7AL U.K. LMAM School of Mathematical Sciences Peking University Beijing 100871 P. R. China

In this paper we study normal forms for a class of germs of 1-resonant vector fields on R^n with mutually different eigenvalues which may admit extraneous resonance relations. We give an estimation on the index of finite determinacy from above as well as the essentially simplified polynomial normal forms for such vector fields. In the case that a vector field has a zero eigenvalue, the result leads to an interesting corollary, a linear dependence of the derivatives of the hyperbolic variables on the central variable.

关键词： index of finite determinacy normal forms resonance vector fields

A video conferencing system based on SDN-enabled SVC multicast

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Frontiers of Information Technology & Electronic Engineering 2016年第7期17卷 672-681页

作者： En-zhong yang Lin-kai ZHANG Zhen YAO Jian yang School of Information Science and Technology University of Science and Technology of China

Current typical video conferencing connection is bridged by a multipoint control unit(MCU),which may cause large delay and communication bottleneck for the whole *** the development of network technology,a video conferencing system can be implemented based on software-defined networking(SDN),which makes the service controllable and improves the scalability and ***,a video encoding method called scalable video coding(SVC) can also *** this paper,we propose a video conferencing architecture based on SDN-enabled SVC multicasting,which discards the traditional Internet group management protocol(IGMP) and *** system implements SVC multicast streaming to satisfy different device capabilities of various conference *** SDN controller is responsible for dynamically managing and controlling the layers of a video stream when a conference member faces network ***,a conference manager is designed to facilitate the management of the conference *** results show that our system can not only provide a flexible and controllable video delivery,but also reduce the network usage while guaranteeing the quality of service(QoS) of video conferencing.

关键词： Software-defined networking(SDN) Multicast Scalable video coding Video conferencing system