Hangzhou, China

China Jiliang University

www.cjlu.edu.cn/
Hangzhou, China

China Jiliang University is a university situated in Hangzhou, the capital city of Zhejiang Province and founded in 1978. Wikipedia.


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Albert J.,Carleton University | Shao L.-Y.,China Jiliang University | Caucheteur C.,University of Mons
Laser and Photonics Reviews | Year: 2013

Optical fiber gratings have developed into a mature technology with a wide range of applications in various areas, including physical sensing for temperature, strain, acoustic waves and pressure. All of these applications rely on the perturbation of the period or refractive index of a grating inscribed in the fiber core as a transducing mechanism between a quantity to be measured and the optical spectral response of the fiber grating. This paper presents a relatively recent variant of the fiber grating concept, whereby a small tilt of the grating fringes causes coupling of the optical power from the core mode into a multitude of cladding modes, each with its own wavevector and mode field shape. The main consequence of doing so is that the differential response of the modes can then be used to multiply the sensing modalities available for a single fiber grating and also to increase the sensor resolution by taking advantage of the large amount of data available. In particular, the temperature cross-sensitivity and power source fluctuation noise inherent in all fiber grating designs can be completely eliminated by referencing all the spectral measurements to the wavelength and power level of the core mode back-reflection. The mode resonances have a quality factor of 105, and they can be observed in reflection or transmission. A thorough review of experimental and theoretical results will show that tilted fiber Bragg gratings can be used for high resolution refractometry, surface plasmon resonance applications, and multiparameter physical sensing (strain, vibration, curvature, and temperature). © 2012 by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Chen D.,Tsinghua University | Chen D.,China Jiliang University | Feng H.,Tsinghua University | Li J.,Tsinghua University
Chemical Reviews | Year: 2012

Graphene, which consists of a one-atom-thick planar sheet comprising an sp-bonded carbon structure with exceptionally high crystal and electronic quality, is a novel material that has emerged as a rapidly rising star in the field of material science. Facile electron transfer between graphene and redox species opens up opportunities for sensing strategies based on direct electron transfer rather than mediation. It is not surprising, therefore, that graphene has recently attracted great attention worldwide from the electrochemical community. Despite its short history, this 2D material has already revealed potential applications in electrochemistry, and remarkably rapid progress in this area has already been made. The oxygen functional groups have been identified as mostly in the form of hydroxyl and epoxy groups on the basal plane, with smaller amounts of carboxy, carbonyl, phenol, lactone, and quinone at the sheet edges.


Chen D.,Tsinghua University | Chen D.,China Jiliang University | Tang L.,Tsinghua University | Li J.,Tsinghua University
Chemical Society Reviews | Year: 2010

Graphene, as the fundamental 2D carbon structure with exceptionally high crystal and electronic quality, has emerged as a rapidly rising star in the field of material science. Its sudden discovery in 2004 led to an explosion of interest in the study of graphene with respect to its unique physical, chemical, and mechanical properties, opening up a new research area for materials science and condensed-matter physics, and aiming for wide-ranging and diversified technological applications. In this critical review, we will describe recent advances in the development of graphene-based materials from the standpoint of electrochemistry. To begin with, electron transfer properties of graphene will be discussed, involving its unusual electronic structure, extraordinary electronic properties and fascinating electron transport. The next major section deals with the exciting progress related to graphene-based materials in electrochemistry since 2004, including electrochemical sensing, electrochemiluminescence, electrocatalysis, electrochemical energy conversion and FET devices. Finally, prospects and further developments in this exciting field of graphene-based materials are also suggested (224 references). © 2010 The Royal Society of Chemistry.


Kuang M.,China Jiliang University | Li Z.,Harbin Institute of Technology
Energy | Year: 2014

Low-volatile fuels such as anthracite and lean coal are widely used in power generators throughout the world. In comparison with tangential-fired and wall-arranged furnaces, down-fired boilers are thought to be more suitable for firing anthracite and lean coal. Currently, down-fired boilers are widely in service and have developed rapidly in China over the past 20 years. In this paper, a comprehensive review of investigations into the gas/particle flow, combustion and NOx emission characteristics within various types of down-fired boilers is presented. The published work disclosed that down-fired boilers suffered similarly from various problems such as late coal ignition, poor combustion stability, low burnout (carbon in fly ash typically in the range 7-15%), heavy slagging, high NOx emissions (typically in the range 1100-2100mg/m3 at 6% O2), and asymmetric combustion. Again, the causes of these problems and various solutions in dealing with them were introduced in turn. Although causes of these problems are complicated, the reported deficiencies such as the premature mixing between high-speed secondary air and low-speed fuel-rich coal/air flow, short coal/air flow penetration depth, downward coal/air flow washing over walls, shallow air-staging conditions, and asymmetric flow-field formation contribute great efforts to develop these problems. To summarize experiences and the lessons in those reported solutions, a series of suggestions for organizing reasonable combustion in down-fired furnaces have been provided so as to achieve timely ignition, symmetric and stable combustion, weak slagging, good burnout, and low NOx emissions. © 2014 Elsevier Ltd.


Li J.,China Jiliang University
Optics Communications | Year: 2010

We designed a narrow bandpass terahertz wave filter using photonic crystals with a line defect. An inserted linear defect in one-dimensional photonic crystal structures for a channeled filtering in the terahertz range are studied and designed theoretically. By using transfer matrix method, we examined the transmittance spectra for the proposed terahertz wave filter has a 3 dB transmission loss bandwidth of 20 MHz ranging from 0.29998 THz to 0.30001 THz. The simulated results show that a very narrow transmission band and high transmission (higher than 99.99%) centered at λ0, and very sharp edges can be achieved. © 2010 Elsevier B.V. All rights reserved.


A siphon drainage type rainfall remote measurement device with self-compensation function is provided. The bottom existence of a rain collection barrel (2) is connected via a flexible tube (14) to the bottom of a rainfall measuring tube (13) to which a siphon (5) is attached. The tube (13) and a measurement instrument (6) are installed on a holding frame (9). The instrument (6) is connected to a pressure sensor (12) and an accumulator (11) at the bottom of the tube (13). The whole device is fixed in an outer barrel (1). According to the pressure of the bottom of the tube (13), the sensor (12) measures the height of the water level in the tube (13) which is directly proportional to the rainfall. The sensor (12) signal processed by the instrument (6) is transformed into the rainfall, processed by a compensation algorithm and sent by GSM or GPRS.


This invention discloses a parallel spiral transmission line structure sensing cable for rock and soil deformation distributed measurement. A circular cross-section silicone rubber is tightly wounded by two insulated wires. The two insulated wires make the spiral cable. Out of the spiral cable is the silicone rubber pipe). They constitute a sensing cable. A termination matching impedance ZL is connected to one end of the two wires. TDR measurement instrument is connected to the other end of the two wires. This invention implements a distributed positioning and measuring rock and sail deformation. It solves the dilemma of measuring at unchanged and the changed is not measured in the landslides, ground subsidence and other geotechnical deformation monitoring. It provides good tool for distributed deformation measurement.


A method and apparatus for remote siphon drainage type rainfull measurement with self-compensation function are provided. The exit in the bottom of the water butt (2) is connected to the bottom of the rainfall measuring tube (13) by the water hose (14). The siphon (5) is in the wall of the rainfall measuring tube (13). The rainfall measuring tube (13) and measuring device (6) are installed on the support bracket (9). The measuring device (6) is connected with the pressure sensor (12) installed in the bottom of rainfall measuring tube (13) and battery (11). The whole apparatus is installed in the outer barrel (1). According to the pressure of the bottom of the rainfall measuring tube (13), pressure sensor (12) can measure the height of the water level of the rainfall measuring tube (13). The height of the water level is in proportional to the rainfall. The signal of the pressure sensor (12) is processed by the measuring device (6), converted into rainfall, then processed by compensation algorithm and at last sent via GSM or GPRS.


This present disclosure provides a sensing cable of parallel spiral transmission line structure for distributed sensing and measuring of rock-soil mass deformation. A circular cross-section of a silicone strip is tightly wounded by two mutually-insulated wires. The two mutually-insulated wires form the spiral cable. The two mutually-insulated wires are wrapped around and covered by a silicone shroud. They constitute a sensing cable. A termination matching impedance is connected to one end of each of the two mutually-insulated wires. A time domain reflectometry measurement instrument is connected to the other end of the two mutually-insulated wires. The present disclosure implements a distributed positioning and measurement of rock-soil mass deformation.


Li J.,China Jiliang University
IEEE Antennas and Wireless Propagation Letters | Year: 2011

An omnidirectional broad-bandwidth microstrip array antenna is proposed, fabricated, and tested. The operating bandwidth of the antenna with usable broadside radiation patterns is about 1910 MHz (2.75-4.66 GHz), which is quite suitable for the application of the WiMAX 3.5-GHz system. The overall dimension of the antenna comes around 550 × 10 × 0.85 mm3. This antenna has the advantages of simple configuration, low profile, compactness, and low fabrication cost. Microwave experiments and numerical simulations are performed to demonstrate its functionalities. © 2006 IEEE.

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