Selection and Configuration Optimization for Customizable Cloud Services

Hongxia Zhang,Fei Wang,Jiuyun Xu,Jiashu Guo 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.4

Cloud services is a typical trait of cloud computing. It allows tenants rent customizable services transparently, and guarantees substantial cost savings for the providers. With the significant number of cloud services, a key challenge when providing customizable cloud services is how to manage those services and find an optimized configuration service rapidly that maximizes tenants’ preferences, subject to resource constraints. To help address this challenge, this paper introduces a novel approach to support the modeling and configuration of customizable cloud services. In particular, we propose a customizable service selecting and configuring optimization approach based on a heuristic approach, which can quickly derive an optimized valid service selection by evaluation different configurations that optimize tenants’ preferences under resource limitations. The scalability and performance of the algorithms is investigated in detail. And the obtained experimental results demonstrate the feasibility of the proposed method.

Why do Sovereign Wealth Funds Invest in Asia?

Hongxia Zhang,Heeho Kim 한국무역학회 2021 Journal of Korea trade Vol.25 No.1

Purpose – This paper aims to examine the determinants of SWFs’ investment in Asian countries and to identify consistent investment patterns of SWFs in specific target firms from Asia, particularly China and South Korea. Design/methodology – This study extends the Tobin’s Q model to examine the relationship between SWF investments in target firms and their returns with other firm-level control variables. We collect consistent data on SWF investments and the matched firm-level data on target firms, which of observation is 1,512 firms (333 in South Korea and 1,179 in China) targeted by 20 SWF sources during 1997–2017. The panel random effect model is used to estimate the extended Tobin’s Q model. The robustness of the estimations is tested by the simultaneous equation models and the panel GEE model. Findings – The evidence shows that sovereign wealth funds are more inclined to invest in the financial sector with a monopoly position and in large firms with higher growth opportunity and superior cash asset ratios in China. In contrast to their investments in China, sovereign wealth funds in South Korea prefer to invest in strategic sectors, such as energy and information technology, and in large firms with high performance and low leverage. Sovereign wealth funds’ investments tend to significantly improve the target firm’s performance measured by sales growth and returns in both Korea and China. Originality/value – The existing literature focuses on examining the determination of SWFs investment in the developed countries, such as Europe and the United States. Our paper contributes to the literature in three ways; first, we analyzes case studies of SWF investments in Asian markets, which are less developed and riskier. Second, we examine whether the determination of SWF investment in Asian target firms depends on the different time periods, on types of sources of SWFs, and on acquiring countries. Third, our research uses vast sample data on target firms in longer time periods (1997-2017) than other previous studies on the SWFs for Asian markets.

A novel elsinochrome A derivative: a study of drug delivery and photodynamic activity

Zhang, Yang,Xie, Jie,Zhang, Luyong,Li, Cong,Chen, Hongxia,Gu, Ying,Zhao, Jingquan Korean Society of Photoscience 2009 Photochemical & photobiological sciences Vol.8 No.12

Elsinochrome A (EA) possesses the highest singlet-oxygen quantum yield (0.98) amongst the perilenoquinoid pigments and may be suitable as a phototherapeutic drug. However, there have been virtually no studies into its medicinal applications. Based on the analysis of chemical derivatives of hypocrellins (the same family as EA), 5-(3-mercapto-1-propanesulfonic acid)-substituted elsinochrome A (MPEA) with an amphiphilicity was designed and synthesized by considering drug delivery and biological activity requirements. MPEA possesses a water solubility of 5.1 mg $mL^{-1}$, which is just sufficient to enable dissolution at a clinically acceptable concentration, while its partition coefficient (n-octanol/phosphate buffered saline) of 7 guarantees affinity to biological targets. MPEA could photogenerate semiquinone anion radicals and reactive oxygen species, especially singlet oxygen, at a yield of 0.73, which approaches that for hypocrellin B. Biological tests confirmed that the photodynamic activity of MPEA was as high as 60% of that of its parent EA, which is significantly higher than that of most other photosensitizers.

Approaching Cicero’s Contact and Communication Zones: Stereotypes, Belittling, and Inverted Roles in Pro Cluentio

Hongxia Zhang 중앙대학교 중앙사학연구소 2020 중앙사론 Vol.0 No.51

본고는 하나의 중요한 사례인 『크루엔티우스를 위한 변론』에 나타난 키케로의 수사적 의사소통 전략에 초점을 맞춘다. 서론에서 “접촉지대”와 “고정관념”의 의미, 그리고 사회학자 Erving Goffman의 상호작용 모델을 분석의 틀로 간략하게 정의하여 짧게 소개한 뒤에, 본문을 두 개의 주요 부분으로 나눠 비교하는 방식으로 진행한다. 로마 사회의 고상한 남성과 어머니라는 이미지의 전형을 키케로가 변호하는 피고인 대 오피아니쿠스 Oppianicus the Elder와 사시아 Sassia의 적대자들로 구성된 반대 이미지와 비교함으로써 키케로가 적용한 전략을 보여준다. 로마의 남성과 로마의 어머니에 반대하는 자들에 대한 키케로의 묘사는 다른 무엇보다도 고정관념, 과소평가, 그리고 역할뒤집기의 충돌에 의해 세밀하게 전개된다. 전략을 짜는 것에 대한 상세한 검토를 통해, 키케로의 설득 방식을 상하 의사소통방식의 일방적 행위가 아닌, 이미 존재하는 청중의 경험과 기대라는 틀 속에서 그가 쌓아올린 이미지들을 세심한 계획 하에 고정시킨 것으로 이해하려 했다. 이러한 구도를 정확하게 인지한 상태에서 키케로는 크루엔티우스의 결백함을 증명하기 위해 목표를 정하고 틀을 구축하여 최종적으로 판사들을 설득시켰다. This article focuses on the rhetorical communication strategy of Cicero in one important course case, Pro Cluentio. After a short introduction where I briefly define the meaning of “contact zone”, “stereotype”, and the interaction model of the sociologist Erving Goffman as framework of my analysis, I proceed in two main sections, and in a comparative way. By contrasting the typical image of being a decent Roman man and Roman mother in Roman society with the anti-images constructed of the antagonists of Cicero’s defendant, Oppianicus the Elder and Sassia, I shall show the case strategy applied by our orator. Cicero’s portrayal of an anti-Roman man and an anti-Roman mother is carefully conducting by clashing stereotypes, belittling, and inverting roles, among others. Through a detailed examination of the framing strategy, I attempt to understand Cicero’s way of persuasion not as a one-directional act of top-down-communication but as a carefully designed anchoring of his constructed images in the already existing frames of experience and expectation of the audience. Exactly knowing these frames, Cicero targeted, framed, and eventually convinced the judges of the innocence of Cluentius.

The formation of magnetic properties in slag glass-ceramic and the effect on performance

Zhang Hongxia 한양대학교 세라믹연구소 2017 Journal of Ceramic Processing Research Vol.18 No.8

Ferrimagnetic glass-ceramics based on the CMAS system are successfully prepared by melting method, using two hazardousindustrial wastes as starting materials. Influences of iron oxide additions on various properties in the slag glass-ceramics havebeen investigated by using DSC, XRD, STEM, HRTEM, SEM, RUS and VSM. The results indicate that the main crystallinephases of the glass-ceramics are augite and the initial nucleation phases are magnetite. Augite as a major crystalline phase andmagnetite as a minor phase are precipitated with high iron oxide content. The comprehensive properties of glass-ceramicsshow a decreased tread with the gradual increase of the iron oxide content. The experimental data of magnetic hysteresis cyclesat room temperature are analyzed with a maximum applied magnetic field of 20 kOe. It can be noted that the variations ofhysteresis parameters in the glass-ceramics are largely dependent on content of magnetite phases.

Real time path planning using trapezoidal acceleration profile for omnidirectional mobile robot

Zhang, Hongxia,Byun, Kyung Seok 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10

In the paper, we consider path planning for an omni-directional mobile robot. Previous solutions to this problem computed paths made up of circular arcs connected by tangential line segments. Such, paths have a non continuous curvature profile. So we propose an efficient solution to the problem that is continuous curvature, the method is used trapezoidal acceleration. Given the desired initial position and orientation of the robot as ( Astart , Vstart , Pstart ) and the desired final position and orientation as ( Atarg et , Vt arg et , Pt arg et ) , it derives successful continuous path with the trapezoidal acceleration method.

Temperature effects on dielectric liquid lenses

Zhang, Hongxia,Ren, Hongwen,Xu, Su,Wu, Shin-Tson The Optical Society 2014 Optics express Vol.22 No.2

Timed Model Checking Service-Oriented Product Lines

Hongxia Zhang,Fei Wang 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.7

Modeling and verification of behavioral variability in service-oriented product line descriptions is very important. Time is a pivotal parameter in representing behaviors of services, which is difficult for scalable modeling and efficient automated checking. In this paper, we describe an approach for modeling and efficient verification of service-oriented product lines. Firstly, we propose feature timed automata, formalism designed to describe the combined behavior of a timed service family, which leverages on establishing relationships between features and transitions. Then, we present feature computation tree logic to model timed properties of service families, which extend computation tree logic to take into account the products constraints. Finally, using our methodology, we analyze a travel agency service family using the model checker UPPAAL. The experiment shows that our approach helps to verify timed service families effectively in the early phases of development.

The Effect of Surface Modifications on the Magnetic Properties of Ni<SUB>0.5</SUB>Zn<SUB>0.5</SUB>Fe₂O₄ Nanoparticles

Wei Zhang,Hongxia Wang,Faling Zhang,Zhengnan Qian,Wenhui Su 한국자기학회 2008 한국자기학회 학술연구발표회 논문개요집 Vol.- No.-

Structure Design and Analysis of a Compact Breast Biopsy Robot under MRI Environment

Yongde Zhang,Haiyan Du,Yuqin Li,Hongxia Zhang 보안공학연구지원센터(IJSIP) 2014 International Journal of Signal Processing, Image Vol.7 No.2