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Subdiffusive Source Sensing by a Regional Detection Method.
Motivated by the fact that the danger may increase if the source of pollution problem remains unknown, in this paper, we study the source sensing problem for subdiffusion processes governed by time fractional diffusion systems based on a limited number of sensor measurements. For this, we first give some preliminary notions such as source, detection and regional spy sensors, etc. Secondly, we investigate the characterizations of regional strategic sensors and regional spy sensors. A regional detection approach on how to solve the source sensing problem of the considered system is then presented by using the Hilbert uniqueness method (HUM). This is to identify the unknown source only in a subregion of the whole domain, which is easier to be implemented and could save a lot of energy resources. Numerical examples are finally included to test our results
Bad Data Injection Attack and Defense in Electricity Market using Game Theory Study
Applications of cyber technologies improve the quality of monitoring and
decision making in smart grid. These cyber technologies are vulnerable to
malicious attacks, and compromising them can have serious technical and
economical problems. This paper specifies the effect of compromising each
measurement on the price of electricity, so that the attacker is able to change
the prices in the desired direction (increasing or decreasing). Attacking and
defending all measurements are impossible for the attacker and defender,
respectively. This situation is modeled as a zero sum game between the attacker
and defender. The game defines the proportion of times that the attacker and
defender like to attack and defend different measurements, respectively. From
the simulation results based on the PJM 5 Bus test system, we can show the
effectiveness and properties of the studied game.Comment: To appear in IEEE Transactions on Smart Grid, Special Issue on Cyber,
Physical, and System Security for Smart Gri
Development of a remanence measurement-based SQUID system with in-depth resolution for nanoparticle imaging
We present a remanence measurement method using a superconducting quantum interference device (SQUID) to detect trace amounts of magnetic nanoparticles (MNPs). Based on this method, a one-dimensional scanning system was established for imaging. The system was calibrated with 25 nm diameter Fe 2 O 3 nanoparticles (NPs), and the sensitivity of the NPs was found to be 10 ng at a distance of 1.7 cm and the spatial resolution was ~1 cm. A theoretical model of this system was developed and applied to the deconvolution of scanned images of phantoms with two NP injection spots. Using the developed SQUID system, we were able to determine not only the amount and horizontal positions of the injections, but also their depths in the phantoms.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/65080/2/pmb9_10_n01.pd
Re-conceptualizing foreignness : the English translation of Chinese calligraphic culture
Foreignness is one primary concern of Translation Studies. Chinese calligraphy, with its unique aesthetic pursuits and cultural underpinnings, presents an unusual case of foreign otherness in relation to the English language. Thus, theories derived from the translation of Chinese calligraphic culture into English can contribute to our existing knowledge of the nature of translation. Despite sporadic endeavors, translation issues related to Chinese calligraphy remain largely under-researched. This thesis constructs a theoretical framework that offers new perspectives on translating foreignness by exploring how the culture of Chinese calligraphy, concretized in the discourses of classical treatises, has been translated into English since the early 20th century. The study of English discourses on Chinese calligraphy, which include linguistic translation, cultural translation, cultural domestication, and statements of facts, reveals a special translational mode that features an interactive and flexible re-contextualization of Chinese calligraphic culture. This study finds that while the traditional practice of translation does not guarantee cross-cultural comprehensibility, the English texts have accommodated the culture of Chinese calligraphy by reconstructing its basics and resorting to visual means of representation. This thesis divides textual manifestations of Chinese calligraphic culture into three parts –– terms, descriptions and metaphors. For terms, I hold that the study of their translations from etymological perspectives implies the possibility of an endless debate on what constitutes a good translation. My study demonstrates that the repeated use of some widely accepted translations is harmless to cultural genuineness and cross-cultural understanding. For descriptive expressions, translation effects diverge from bringing out literal meanings to revealing cultural meanings. Besides, cultural dilution of varying degrees is found in translation. Calligraphic metaphors, which exemplify traditional Chinese worldviews and correlative thinking patterns, are largely unfamiliar to English-speaking readers. My study reveals a re-contextualizing endeavor that revitalizes these metaphors in the Anglo-American context. On the basis of the case study of the English texts on Chinese calligraphy, this thesis proposes a new theoretical framework for re-conceptualizing foreignness. The three components of this framework are bicultural competency, intercultural competency, and cross-cultural attitudes, all gravitating towards the goal of understanding foreignness. In addition, I introduce three levels of foreign knowledge that cover one’s perception of foreignness at different stages of understanding and with different depths. I also propose to expand the meaning of intercultural integration that is a key manifestation of intercultural competency. One salient part of this framework is that I place anthropological and traditional Chinese zhihui approaches under the structure of cross- cultural attitudes. Such a theoretical advancement empowers the explanative mechanism of the framework. Finally, I argue that the representation of foreignness as it is can be accomplished by strategic re-contextualization, and thus meanings lost in one place can be regained somewhere else
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