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Your search keyword '"Jiang, Xiuzhen"' showing total 13 results
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13 results on '"Jiang, Xiuzhen"'

6. Characterization of prolidase activity using capillary electrophoresis with tris(2,2'-bipyridyl)ruthenium(II) electrochemiluminescence detection and application to evaluate collagen degradation in diabetes mellitus

Author

Yuan, Jipei, Li, Tao, Yin, Xue-Bo, Guo, Li, Jiang, Xiuzhen, Jin, Wenrui, Yang, Xiurong, and Wang, Erkang

Subjects
Electrophoresis -- Usage, Diabetes -- Analysis, Chemistry
Abstract

A new method for prolidase (PLD, EC 3.4.13.9) activity assay was developed based on the determination of proline produced from enzymatic reaction through capillary electrophoresis (CE) with tris(2,2'-bipyridyl)ruthenium(II) [Ru[(bpy).sub.3.sup.2+]] electrochemiluminescence detection (ECL). A detection limit of 12.2 fmol (S/N = 3) for proline, corresponding to 1.22 x [10.sup.-8] units of prolidase catalyzing for 1min was achieved. PLD activity determined by CE-ECL method was in agreement with that obtained from the classical Chinard's one. CE-ECL showed its powerful resolving ability and selectivity as no sample pretreatment was needed and no interference existed. The clinical utility of this method was successfully demonstrated by its application to assay PLD activity in the serum of diabetic patients in order to evaluate collagen degradation in diabetes mellitus (DM). The results indicated that enhanced collagen degradation occurred in DM.

Published
2006

7. Service-driven resource allocation based on energy efficiency in UUDN

Author

Hong Ji, Jiang Xiuzhen, and Xi Li

Subjects
Service (systems architecture), Resource (project management), Computer science, business.industry, Distributed computing, Cellular network, Wireless, Resource allocation, Resource management, business, 5G, Efficient energy use
Abstract

By introducing the concept of the network serving user, user-centric ultra dense network (UUDN) is proposed as a promising approach of 5G. The access point group (APG), which consists of one or several APs, is dynamically organized to serve each user in UUDN. The APs within an APG need to cooperate to serve a user, and then the resource allocation is much different compared to that in traditional cellular networks. How to effectively allocate the resource among APs within an APG is a crucial issue to serve a user. Considering user's different service flow and system energy efficiency, in this paper we propose a service-driven resource allocation scheme for UUDN to maximize the energy efficiency. This scheme can jointly allocate power and sub-carriers among the serving APs to satisfy user's demand. Besides, it adjusts the number of APs dynamically to serve users according to their service flow. Simulation results show that compared with the existing algorithms, the proposed scheme has better performance in satisfying user's demand and improving system energy efficiency.

Published
2017

13. Mechanism analysis on biofouling detection based on optical fiber sensing technique

Author

Ma, Huiping, Yuan, Feng, Liu, Yongmeng, and Jiang, Xiuzhen

Abstract

More attention is paid to on-line monitoring of biofouling in industrial water process systems. Based on optical fiber sensing technology, biofouling detection mechanism is put forward in the paper. With biofouling formation, optical characteristics and the relation between light intensity and refractive index studied, schematic diagram of optical fiber self-referencing detecting system and technological flowchart are presented. Immunity to electromagnetic interference and other influencing factors by which the precision is great improved is also remarkable characteristic. Absorption spectrum of fluid medium molecule is measured by infrared spectrum and impurity is analyzed by character fingerprints of different liquid. Other pollutant source can be identified by means of infrared spectrum and arithmetic research of artificial neural networks (ANN) technology. It can be used in other fields such as mining, environment protection, medical treatment and transportation of oil, gas and water.

Published
2010
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