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PROGRESS IN PHASE INVERSION EMULSIFICATION FOR EPOXY RESIN WATERBORNE DISPERSIONS

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Chinese Journal of Polymer Science 2007年第2期25卷 137-143页

作者： Zhen-zhong yang State Key Laboratory of Polymer Physics and Chemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China

In this review, our recent work in phase inversion emulsification （PIE） for polymer （especially epoxy resin） waterborne dispersions is summarized. Based on experimental results about PIE process, the physical model is proposed which can guide the synthesis of the waterborne dispersions such as polymer/nanoparticle composite dispersion. In the presence of a latent curing catalyst, PIE can give a crosslinkable epoxy resin waterborne dispersion. The dispersions can form cured transparent coatings with some unique properties such as UV shielding. They are promising in functional coatings, waterborne resin matrices for composites, and sizing for high performance fibers.

关键词： Phase inversion emulsification Epoxy resin Waterborne dispersions.

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

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

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

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

Drift of Spiral Waves in Complex Ginzburg-Landau Equation

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Communications in Theoretical Physics 2006年第4期45卷 647-652页

作者： yang Jun-zhong ZHANG Mei School of Science Beijing University of Posts and Telecomunications Beijing 100876 China Center for Advanced Study Tsinghua University Beljing 100084 China

The spontaneous drift of the spiral wave in a finite domain in the complex Ginzburg Landau equation is investigated numerically. By using the interactions between the spiral wave and its images, we propose a phenomeno... 详细信息

关键词： oscillatory medium spontaneous drift of spiral wave attractor

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

Conformists and Contrarians in a Kuramoto Model with Uniformly Distributed Natural Frequencies

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Communications in Theoretical Physics 2013年第6期59卷 684-688页

作者： YUAN Di yang Jun-zhong School of Science Beijing University of Posts and Telecommunications Beijing 100876 China School of Physics and Electrical Engineering Anyang Normal University Anyang 455000 China

A generalization of the Kuramoto model in which oscillators are coupled to the mean field with random signs is investigated in this work. We focus on a situation in which the natural frequencies of oscillators follow a uniform probability density. By numerically simulating the model, we find that the model supports a modulated travelling wave state except for already reported 7r state and travelling wave state in the one with natural frequencies following Lorenztian probability density or a delta function. The dependence of the observed dynamics on the parameters of the model is explored and we find that the onset of synchronization in the model displays a non-monotonic dependence on both positive and negative coupling strength.

关键词： Kuramoto model modulated travelling wave state conformist contrarian