An Improved Algorithm for Acoustic Radiation Force Impulse Imaging Based on Loupas Approach

YouXin,ShiDan,YinHao,LiuYu,Dongc Liu 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.12

With the purpose of solving the issue that there are errors in the traditional Loupas Algorithm used in ARFI and the effects of imaging are not as good as expected, this thesis will talk about an improved method to solve this proplem.Based on Loupas Algorithm, it is presented that we can get more accurate computing result of the displacement by changing the size of the sampling time windows and calculating the average speed according to the 2D autocorrelator.The method presented in this paper is aimed at doing computing refering to the tiny displacement caused by the push from ARFI and comparing between the displacement-time graph of the focus of the windows with different value.Finally,from these,people can know the most suitable value of the sampling time windows.Compared with the result of the experientunder traditional Loupas Algorithm,that of this experient has improved a lot.As a result,not only Elastographic Contrast-to-Noise Ratio has been improved,but also the image quality.

论香港本土主义的流变及其公法应对

Man, Lai Pui,Yinhao, Tan Korea Consensus Institute(KCI) 2019 Analyses & alternatives Vol.3 No.1

Throughout history, there are three clues of dualistic structures for the development of Hong Kong's nativism. First, inward attribution and outward lookingare two paths to the formation of Hong Kong's nativism. In the dualistic framework of "self-others", nativism is formed. The formation path of "outward looking"can be seen everywhere in the construction history of Hong Kong's nativism. It is under the reflection of "two mirrors" with Britain and Chinese mainland that Hong Kong people acquire the concept of "Hong Kong's nativism". Second, there are two aspects of Hong Kong's nativism: economic and cultural aspect and political aspect. With the gradual development of Hong Kong's history, these two aspects come into being and are closely bound up, thus constituting Hong Kong's nativism today. The third clue is the most critical one. The subjectivity of colonization and decolonization are two different forms of Hong Kong people's subjectivity. These three clues run through the whole process of the construction of Hong Kong nativism, and are carried out in three stages of development: "Origin (1960s-1970s): Preliminary Construction of Hong Kong's Nativism", "Development of Hong Kong's Nativism (1980s-1997): Awakening of Political Aspect" and "Formation and Alienation of Hong Kong's Nativism (1997-present): Deformed "decolonization". Along the evolution of Hong Kong's nativism, with the disintegration of colonialism, Hong Kong people have gradually transited from the subjectivity of colonization to the subjectivity of decolonization, but the process of "decolonization" has not been completed up to now.When nativism loses its native complex from the perspective of "inherent in China", and further develops into the "separatism" of anti-constitutional system and anti-national continuity and unity, it will challenge the stability of the relationship between the central government and the Special Administrative Region under the "one country, two systems". At the same time, it will have a greater impact on the political structure and the rule of law system of Hong Kong, and trigger a series of public law problems that need to be solved urgently. In this regard, on the one hand, we should re-clarify the relationship between the central government and the region under the "one country, two systems" in light of the new situation of democratic political development in Hong Kong, and improve Hong Kong's governance mechanism on the basis of the constitution and the basic law; on the other hand, we should actively learn from the German defensive democracy system to systematically interpret, integrate and apply Hong Kong's existing legal resources so as to effectively curb the development of local separatist forces.

论香港本土主义的流变及其公法应对

Lai Pui Man,Tan Yinhao 사단법인 코리아컨센서스연구원 2019 분석과 대안 Vol.3 No.1

Throughout history, there are three clues of dualistic structures for the development of Hong Kong’s nativism. First, inward attribution and outward lookingare two paths to the formation of Hong Kong’s nativism. In the dualistic framework of “self-others”, nativism is formed. The formation path of “outward looking”can be seen everywhere in the construction history of Hong Kong’s nativism. It is under the reflection of “two mirrors” with Britain and Chinese mainland that Hong Kong people acquire the concept of “Hong Kong’s nativism”. Second, there are two aspects of Hong Kong’s nativism: economic and cultural aspect and political aspect. With the gradual development of Hong Kong’s history, these two aspects come into being and are closely bound up, thus constituting Hong Kong’s nativism today. The third clue is the most critical one. The subjectivity of colonization and decolonization are two different forms of Hong Kong people’s subjectivity. These three clues run through the whole process of the construction of Hong Kong nativism, and are carried out in three stages of development: “Origin (1960s-1970s): Preliminary Construction of Hong Kong’s Nativism”, “Development of Hong Kong’s Nativism (1980s-1997): Awakening of Political Aspect” and “Formation and Alienation of Hong Kong’s Nativism (1997-present): Deformed “decolonization”. Along the evolution of Hong Kong’s nativism, with the disintegration of colonialism, Hong Kong people have gradually transited from the subjectivity of colonization to the subjectivity of decolonization, but the process of “decolonization” has not been completed up to now. When nativism loses its native complex from the perspective of “inherent in China”, and further develops into the “separatism” of anti-constitutional system and anti-national continuity and unity, it will challenge the stability of the relationship between the central government and the Special Administrative Region under the “one country, two systems”. At the same time, it will have a greater impact on the political structure and the rule of law system of Hong Kong, and trigger a series of public law problems that need to be solved urgently. In this regard, on the one hand, we should re-clarify the relationship between the central government and the region under the “one country, two systems” in light of the new situation of democratic political development in Hong Kong, and improve Hong Kong’s governance mechanism on the basis of the constitution and the basic law; on the other hand, we should actively learn from the German defensive democracy system to systematically interpret, integrate and apply Hong Kong’s existing legal resources so as to effectively curb the development of local separatist forces.

Criteria for evaluating working fluids in loop gravity-assisted heat systems

Chen Jianxun,Liu Jinping,Xu Xiongwen,Liang Lingjiao,Yu Yinhao 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.9

A loop gravity-assisted heat pipe (LGHP) is characterized by passive heat dissipation and extensive application prospect. Dissimilar working fluids give rise to noticeable differences in their working performance (Critical heat flux (CHF)). Consequently, it is of great significance to evaluate the performance of LGHP working fluid for its design. In accordance with the basic theories of CHF and hydrodynamics, the pressure drop models of laminar, smooth turbulence, and completely rough turbulence flows were established, and an extensible two-phase composite property parameter was obtained. On this basis, the physical property parameter of transitional rough turbulent flow was also derived. Finally, as persuasively illustrated by the experimental results, there was almost a linear association between CHFs and the derived physical parameter. As a result, the physical parameters derived in this paper can be employed as favorable criteria for the selection of LGHP working fluid.