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Papers by Liu bo
Microwave and Optical Technology Letters, 2008
A fiber ring down with a weak long period grating (WLPG) for temperature and strain sensing is pr... more A fiber ring down with a weak long period grating (WLPG) for temperature and strain sensing is proposed and demonstrated. The sensing devices consist of two matched fiber Bragg gratings, a section of single mode fiber, a WLPG, a pulsed laser source, and a photodiode. The LPG incorporated in fiber ring cavity is used as sensing element, the induced resonance wavelength shift of which will cause an additional loss in the cavity. As a result, the amplitude of applied temperature variation or strain can be obtained by simply measuring the fiber ring down time. The proposed sensing system has advantages of easy configuration and rapid response. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 111–114, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23006
In order to improve the communication speed, low-delay anonymous communication systems, such as T... more In order to improve the communication speed, low-delay anonymous communication systems, such as Tor, prefer high performance router when selecting routers. This choice makes routers' selection being local. This paper first proposes router selecting algorithm based on location diversity and RTT; then a hierarchical location-diversity-based low-delay anonymous communication framework is presented. This framework's security is analyzed and a simulation experiment and result analysis is given. The theoretic analysis and simulation experiment indicate that the HLLACF can prevent AS-Level passive attack and other similar attacks well while decreasing communication delay and HLLACF also scales well.
Solar Energy Materials and Solar Cells, 2003
IEEE/OSA Journal of Lightwave Technology, 2008
(Abstract)The paper analyses the relations between entities and activities based on enterprise su... more (Abstract)The paper analyses the relations between entities and activities based on enterprise subject databases, and proposes the affinitive degree and the polymeric degree for entities based on active-entity relations to create the polymeric degree matrix. According to the sizes of entity polymeric degrees, the method for dividing subject databases is presented to obtain the core entity pair, which is used to polymerize the same entity between the other second entity pair and the core one. The entity pair is calculated with weighted polymeric degrees to divide into some subject databases based on the core entity pairs. The example compares the calculation results of the affinitive degree matrix and the polymeric degree matrix, which shows that it is distinctly reflect the affinity and the trend among entities by creating subject databases based on the polymeric degree
Microwave and Optical Technology Letters, 2008
A fiber ring down with a weak long period grating (WLPG) for temperature and strain sensing is pr... more A fiber ring down with a weak long period grating (WLPG) for temperature and strain sensing is proposed and demonstrated. The sensing devices consist of two matched fiber Bragg gratings, a section of single mode fiber, a WLPG, a pulsed laser source, and a photodiode. The LPG incorporated in fiber ring cavity is used as sensing element, the induced resonance wavelength shift of which will cause an additional loss in the cavity. As a result, the amplitude of applied temperature variation or strain can be obtained by simply measuring the fiber ring down time. The proposed sensing system has advantages of easy configuration and rapid response. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 111–114, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23006
In order to improve the communication speed, low-delay anonymous communication systems, such as T... more In order to improve the communication speed, low-delay anonymous communication systems, such as Tor, prefer high performance router when selecting routers. This choice makes routers' selection being local. This paper first proposes router selecting algorithm based on location diversity and RTT; then a hierarchical location-diversity-based low-delay anonymous communication framework is presented. This framework's security is analyzed and a simulation experiment and result analysis is given. The theoretic analysis and simulation experiment indicate that the HLLACF can prevent AS-Level passive attack and other similar attacks well while decreasing communication delay and HLLACF also scales well.
Solar Energy Materials and Solar Cells, 2003
IEEE/OSA Journal of Lightwave Technology, 2008
(Abstract)The paper analyses the relations between entities and activities based on enterprise su... more (Abstract)The paper analyses the relations between entities and activities based on enterprise subject databases, and proposes the affinitive degree and the polymeric degree for entities based on active-entity relations to create the polymeric degree matrix. According to the sizes of entity polymeric degrees, the method for dividing subject databases is presented to obtain the core entity pair, which is used to polymerize the same entity between the other second entity pair and the core one. The entity pair is calculated with weighted polymeric degrees to divide into some subject databases based on the core entity pairs. The example compares the calculation results of the affinitive degree matrix and the polymeric degree matrix, which shows that it is distinctly reflect the affinity and the trend among entities by creating subject databases based on the polymeric degree