Application of Independent Finance Certification Agency in the Decision Process of Vendor Selection

Luan Chunxiao 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.5

This paper introduces independent finance certification agency to supervise the vendor selection process under the circumstance of the dynamic and incomplete information market. Using the signaling theory under unsymmetric information of game theory, a multidimension signaling model of the strategic choice is established. The game model is set up and the equilibrium calculated out following the description of the key elements of the buyer and vendor in above market. Upon separating equilibrium, the provider dispatches the signal stands for his actual category to maintain the performance of the market. Upon pool equilibrium, the inefficient provider rather than efficient one occupies the core position which results in loss of the latter. Case result shows that the buyer can adopt the signals from the Independent finance certification agency as a significant element when making decision. As a result the introduction of independent finance certification agency can effectively and efficiently supervise the vendor selection process in incomplete information market.

A 3D Nitrate-bridging Heterometal-azido Inorganic Polymer Containing Cd₈ Cube: Synthesis, Structure, Topology and Fluorescence

Luan, Feng,Xu, Ling,Gao, Yuan,Liu, Bing Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.5

Gene Expression Profiling in the Pituitary Gland of Laying Period and Ceased Period Huoyan Geese

Luan, Xinhong,Cao, Zhongzan,Xu, Wen,Gao, Ming,Wang, Laiyou,Zhang, Shuwei Asian Australasian Association of Animal Productio 2013 Animal Bioscience Vol.26 No.7

Huoyan goose is a Chinese local breed famous for its higher laying performance, but the problems of variety degeneration have emerged recently, especially a decrease in the number of eggs laid. In order to better understand the molecular mechanism that underlies egg laying in Huoyan geese, gene profiles in the pituitary gland of Huoyan geese taken during the laying period and ceased period were investigated using the suppression subtractive hybridization (SSH) method. Total RNA was extracted from pituitary glands of ceased period and laying period geese. The cDNA in the pituitary glands of ceased geese was subtracted from the cDNA in the pituitary glands of laying geese (forward subtraction); the reverse subtraction was also performed. After sequencing and annotation, a total of 30 and 24 up and down-regulated genes were obtained from the forward and reverse SSH libraries, respectively. These genes mostly related to biosynthetic process, cellular nitrogen compound metabolic process, transport, cell differentiation, cellular protein modification process, signal transduction, small molecule metabolic process. Furthermore, eleven genes were selected for further analyses by quantitative real-time PCR (qRT-PCR). The qRT-PCR results for the most part were consistent with the SSH results. Among these genes, Synaptotagmin-1 (SYT1) and Stathmin-2 (STMN2) were substantially over-expressed in laying period compared to ceased period. These results could serve as an important reference for elucidating the molecular mechanism of higher laying performance in Huoyan geese.

Synthesis of a highly conductive and large surface area graphene oxide hydrogel and its use in a supercapacitor

Luan, V.,Tien, H.,Hoa, L.,Hien, N.,Oh, E. S.,Chung, J.,Kim, E.,Choi, W.,Kong, B. S.,Hur, S. Royal Society of Chemistry 2013 Journal of materials chemistry. A, Materials for e Vol.1 No.2

A Comparison of Computation Offloading Schemes in Multi-Access Edge Computing

Luan N.T. Huynh,Xuan-Qui Pham,Tri D.T. Nguyen,Eui-Nam Huh 한국정보과학회 2018 한국정보과학회 학술발표논문집 Vol.2018 No.6

Prediction model of stall evolution stages in a centrifugal impeller based on characteristic analysis of the hydraulic torque of blades and support vector machine

Luan Shi,Zhuqing Liu,Wei Yang,Yaojun Li,Xiaodong Liu,Ran Tao 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.10

If a centrifugal impeller is in deep stall, it requires a large amount of additional energy to break free. As such, it is crucial to study the prediction method of impeller stall and establish its relationship with force and torque. This study employs a computational fluid dynamics numerical simulation method to analyze the flow field within the impeller of a centrifugal pump, while monitoring the changes in hydraulic torque of the blades. By examining the impeller’s internal flow field characteristics and external (energy performance) characteristics curves under different working conditions, the stall process was classified into three stages: germination, transition and stabilization. The evolution of stall cells under different stall stages was also analyzed. We utilized time-frequency conversion and analysis to extract characteristic parameters from instantaneous hydraulic torque results generated under different working conditions. A more effective model for predicting impeller stall stages was built by virtue of support vector machine algorithm. The proposed model exhibits improved feasibility and effectiveness in comparison to traditional prediction methods. It is expected to have significant implications for stable operation monitoring and safety protection of centrifugal pumps.

산동지역(山東地域) 용산시대(龍山時代)~早期 청동기시대(靑銅器時代)의 문화(文化)와 사회변천(社會變遷)-해대지역(海岱地域) 용산문화(龍山文化) 시기(時期)의 사회(社會)를 중심으로-

( Luan Fengshi ) 한국고대학회 2013 先史와 古代 Vol.38 No.-

황하와 회하 하류의 해대 지구는 중국 신석기시대부터 조기 청동기시대에 이르는 기간 동안의 몇 개 주요한 문화 구계 가운데 하나였다. 이 구역의 고고문화는 조기부터 만기에 이르기까지 편편동 유물복합, 후리문화, 북신문화, 대문구문화, 용산문화, 악석문화와진 주문문화(상주문화)의 순서로 변모되었다. 지금으로부터 4,000~5,000년 전의 용산시대 는 이 지구에 초기국가가 탄생하는 중요한 시기에 해당한다. 조와 도작농업과 도기 제작으로 대표되는 수공업이 용산문화 시기에 큰 발전을 이루었고, 이것이 초기국가 탄생의 물질적 기초를 이루었다. 용산문화 시기의 취락과 고분 자료를 통해서 볼 때, 일반적으로 하나의 취락 내부에 4등급의 취락 구조가 존재하고 있었는데, 이는 핵심가정, 대가정, 가족, 종족 등의 사회조직과 대응된다. 구역 내 취락 형태를 통해 용산문화 시기에 이미 규모가 상이한 취락군이 출현하였음을 알 수 있는데, 일반취락군의 내부에는 대형, 중형, 소형 취락이 피라미드 구조를 이루고 있었다. 게다가 약간의 특정 구역에는 특대형, 대형, 중형, 소형의 4등급의 취락 형태가 형성되어 있기도 하였다. 이들 3등급과 4등급의 구조를 갖추고 있는 취락군 내에는 대개 1개의 대형 성지취락이 중심을 이루고 있으면서 그 아래에 수량이 일정하지 않은 중형과 소형 취락을 통할하고 있었는데, 이는 중국 고대 문헌 기록에 언급되어 있는 전형적인 "도, 읍, 취"의 사회 구조에 부합된다. The Haidai Region, located in the lower Yellow River and Huai River, is one of the main cultural regions in China covering from the Neolithic to Early Bronze Age. Bianbiandong remains, Houli, Beixin, Dawenkou, Longshan, Yueshi, and Zhenzhumen (Shang and Zhou Periods) are the archaeological cultures developed in this area. Among them, the Longshan Period is the crucial stage to develop the early states since the foundations for early civilization, such as the cultivations of millet and rice, and handicraft in making delicate pottery, both experienced tremendous advances in this period. According to the house remains and burials, four-level house structure is believed to exist with in a single settlement, which reflects nuclear family, extended family, kinship, and clan respectively in social context. Beyond this, the LongshanCulture also witnessed the development of settlement clusters, most of which consisted of big, medium, and small settlements. In some special area, even four different levels of settlement, namely huge, big, medium, and small, evolved in this period. Among those three or four level structures, a big city settlement was centered by dozens of medium and small settlements, which accorded with the structure of ``City, Town, and Settlement`` described by Chinese ancient documents.

EXAMPLES OF SIMPLY REDUCIBLE GROUPS

Luan, Yongzhi Korean Mathematical Society 2020 대한수학회지 Vol.57 No.5

Simply reducible groups are important in physics and chemistry, which contain some of the important groups in condensed matter physics and crystal symmetry. By studying the group structures and irreducible representations, we find some new examples of simply reducible groups, namely, dihedral groups, some point groups, some dicyclic groups, generalized quaternion groups, Heisenberg groups over prime field of characteristic 2, some Clifford groups, and some Coxeter groups. We give the precise decompositions of product of irreducible characters of dihedral groups, Heisenberg groups, and some Coxeter groups, giving the Clebsch-Gordan coefficients for these groups. To verify some of our results, we use the computer algebra systems GAP and SAGE to construct and get the character tables of some examples.

Identifying New Technologies in Product and Processes through Patent Databanks

Luan Carlos Santos Silva,Carla Schwengber ten Caten,Silvia Gaia,Renata Tilemann Facó,Lidiana Zocche,Rosana Travessini 한국유통과학회 2015 The Journal of Industrial Distribution & Business( Vol.6 No.3

Purpose - This paper’s aim is to analyze the technological information in patent databanks as a strategy in prospecting for new technologies. Research design, data, and methodology - We detail the major free electronic database sources for patent information, the patent documents, the patent document structures, INID codes (Internationally Agreed Numbers for the Identification of Data), indexation, references, and classification notions. Additionally, we review and analyze information on the activities of the Center of Dissemination Documentation and Technological Information (CEDIN) from the National Institute of Intellectual Property (INPI) of Brazil for the period 2000 to 2011. Results - The research shows that the technological information contained in the patents could provide a wide range of functionality within companies and universities. Conclusions - In recent years, (CEDIN), a specialist in intellectual property, has been serving internal and external users by providing guidance on the basis of patents and other literature, but the number of users served is still small. In order to familiarize more potential users of such technological information, task forces should be created among INPI, universities, and companies.

Polyurethane sponges decorated with reduced graphene oxide and silver nanowires for highly stretchable gas sensors

Luan, Yange,Zhang, Shaolin,Nguyen, Thuy Hang,Yang, Woochul,Noh, Jin-Seo Elsevier 2018 Sensors and actuators. B Chemical Vol.265 No.-

<P><B>Abstract</B></P> <P>Unlike the stretchable physical sensors such as stretchable pressure sensors, strain sensors, and temperature sensors, few works have been reported on the stretchable gas sensors. This study presents that stretchable gas sensors can be fabricated by decorating reduced graphene oxide/silver nanowires (rGO/AgNWs) hybrids on the porous polyurethane (PU) sponges using a facile dip-coating method. The sensors show good room-temperature responses to NO<SUB>2</SUB> gas under both a bending strain (r = 3 mm) and a large tensile strain up to 60%. The response of about −15% is measured at a 50 ppm of NO<SUB>2</SUB> under a 60% strain. Furthermore, reducing gases like acetone and ethanol can also be detected under the large strains. The results of this study offer a new insight into realization of highly stretchable and easy-to-fabricate gas sensors.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Highly stretchable gas sensors are fabricated by the dip-coating method. </LI> <LI> The electrical properties of the sensors can be easily tuned. </LI> <LI> The sensors can detect an oxidizing gas, NO<SUB>2</SUB>, and reducing gases, acetone and ethanol. </LI> <LI> The stretchable gas sensors work stably even under large strains up to 60%. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>