Performance Comparation of TR and FDE in the MB - IR - UWB System Based on MIMO

Yu Xin,Qi Lin,Dou Zheng,Lin Yun 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.3

In order to improve the channel capacity of the multiband impulse radio ultra-wide-band (MB-IR-UWB) system, the multiple input and multiple output (MIMO) technology is introduced to MB-IR-UWB system, and we get a new MB-IR-UWB system based on MIMO. But the introduction of MIMO technology brings multi-stream interference (MSI) and same frequency interference (SFI). Meanwhile, there may be inter-symbol interference (ISI) over the multipath channel proposed by IEEE 802.15.3a. To eliminate these interferences, it is necessary to add an equalization technique which is a technique used for increasing the energy of the desired signal and reducing the energy of the undesired signal. In this system, we introduce time reversal (TR) equalization and frequency domain equalization (FDE) to the new system and compare the performance of the two equalizations. In this paper, by MATLAB simulation, we compare the robustness to channel and the anti-interference performance of two different equalizations in the MB-IR-UWB system based on MIMO.

咽頭音化假說에 대한 재검정

진위신(CHEN, Yuxin),이경철(LEE, Kyungchul) 동북아시아문화학회 2023 동북아시아문화학회 국제학술대회 발표자료집 Vol.2023 No.10

This study embarks on an intricate analysis of the unique characteristics that differentiate Class 3 and non-Class 3 syllables within the realm of Chinese phonology. Particular emphasis is placed on their historical manifestations in Old Chinese and Middle Chinese, two crucial periods in the evolution of the Chinese language. Utilizing scientific statistical techniques—specifically, Chi-Squared tests, Yates correction, and Fisher’s Exact tests—this research aims to bolster the precision and dependability of its conclusions. In an innovative move to broaden the scope, our research sample transcends the limitations of internal Chinese lexical material. We also incorporate related vocabulary from Sino-Hmong-Mien and Sino-Kuki-Chin (Mizo) languages. This multi-lingual approach offers a more comprehensive lens through which the unique features of Class 3 and non-Class 3 syllables can be examined and verified. The studys findings robustly corroborate the prior work of Chen Yuxin and Lee Kyung Chul (2022), solidifying the argument that the primary differentiating factor between Class 3 and non-Class 3 syllables in Old Chinese is their opposition based on pharyngeal prenuclear glides. Remar kably, these glides are observed to undergo an evolutionary shift towards *j prenuclear glides during the Middle Chinese period. By deploying a series of rigorous scientific validations, this study doesnt just validate previous theories but strives to lay a stronger foundation for future research in Chinese phonology. Such rigorous methodologies and expanded dataset are expected to be instrumental in refining our understanding of historical linguistic shifts and providing a more robust theoretical framework for subsequent scholarly endeavors in the domain of Chinese phonology.

트랜스-히말라야어와 몽몐어의 시각에서 본 上古漢語의 咽頭音化假說

진위신(Chen, Yuxin),이경철(Lee, Kyong chul) 동북아시아문화학회 2023 동북아 문화연구 Vol.1 No.77

In Chinese historical phonology, the issue of Grade III has posed intricate challenges, including complexities like the elusive distinctions between Grade III and non-Grade III phonological features. Various theories have been proposed by the academic community over the years, such as the Long and Short Vowel Hypothesis, and the Initial Pharyngealization Hypothesis. This study primarily focuses on the Initial Pharyngealization Hypothesis in Old and Middle Chinese and conducts a comparative analysis of pharyngealization in both Chinese and Tangut languages. The research predominantly employs relational words between Chinese and Hmong-Mien languages, as well as cognates between Chinese and Tibetan languages. Simultaneously, it builds on the academic foundation laid by Chen Yuxin Lee Kyung-Chul and Xun Gong, embarking on a comprehensive comparative analysis. The findings unveil significant similarities between Chinese and Tangut languages concerning the ‘yod’ issue. Through two distinct investigations into Chinese-Tibetan cognates and Chinese-Hmong Mien relational words, this paper validates that the Grade III in Chinese is unrelated to ‘yod’. Moreover, the study of relational words from the Chinese and Mong-Mien languages further corroborates that non-Grade III in Chinese are intricately tied to pharyngealization. Drawing from the results, it can be concluded that the pharyngealization hypothesis in Chinese is underpinned by clear evidence. Furthermore, in future explorations within this domain, the author believes that a profound study of cognates in the Chinese-Bai languages holds significant merit.

Outcomes of salvage liver transplant for recurrent hepatocellular carcinoma

Yuxin Guo,Ek-Khoon Tan,Thinesh-Lee Krishnamoorthy,Chee-Kiat Tan,Ban-Hock Tan,Thuan-Tong Tan,Ser-Yee Lee,Chung-Yip Chan,Peng-Chung Cheow,Alexander Y. F. Chung,Prema Raj Jeyaraj,Brian K. P. Goh 한국간담췌외과학회 2019 Annals of hepato-biliary-pancreatic surgery Vol.23 No.1

Backgrounds/Aims: Salvage liver transplantation (SLT) is a therapeutic strategy for recurrent hepatocellular carcinoma (HCC). However, it remains controversial with compromised survival outcomes and increased perioperative morbidity compared to primary liver transplant (PLT). In the present work, we describe our institution’s experience on SLT by comparing outcomes of SLT to PLT for HCCs. Methods: Retrospective analysis was conducted for 49 transplant patients from 2006-2017. A comparative analysis was carried out between 14 SLT patients and 35 PLT patients. Results: SLT patients demonstrated significantly shorter time to recurrence than PLT patients (median=5.5 versus 23 months, p<0.001) with a trend towards increased perioperative major morbidity (42.9% versus 37%, p=0.711), inferior 5-year overall survival (61% versus 75%, p=0.345) and inferior 5-year recurrence-free survival (57% versus 72%, p=0.263). However, overall survival from the point of primary resection over a 10-year period showed no statistical difference between the 2 groups (SLT=60% versus PLT=61%, p=0.685). Conclusions: SLT is a viable treatment strategy for HCCs. However, it exhibited poorer short-term perioperative and oncologic outcomes than PLT. SLT requires better patient selection with liver donor grafts for optimization of resource allocation in this era of organ shortage. Considering the worldwide shortages in liver grafts, it is hypothesized that optimization of a salvage transplant strategy may improve resource allocation and reap optimal patient outcomes.

A recent trend: application of graphene in catalysis

Yuxin Yan,Woo In Shin,Hao Chen,Shar‑Mun Lee,Sivakumar Manickam,Svenja Hanson,Haitao Zhao,Edward Lester,Tao Wu,Cheng Heng Pang 한국탄소학회 2021 Carbon Letters Vol.31 No.2

Abstract Graphene, an allotrope of carbon in 2D structure, has revolutionised research, development and application in various disciplines since its successful isolation 16 years ago. The single layer of sp2-hybridised carbon atoms brings with it a string of unrivalled characteristics at a fraction of the price of its competitors, including platinum, gold and silver. More recently, there has been a growing trend in the application of graphene in catalysis, either as metal-free catalysts, composite catalysts or as catalyst supports. The unique and extraordinary properties of graphene have rendered it useful in increasing the reactivity and selectivity of some reactions. Owing to its large surface area, outstanding adsorptivity and high compatibility with various functional groups, graphene is able to provide a whole new level of possibilities and flexibilities to design and synthesise fit-for-purpose graphene-based catalysts for specific applications. This review is focussed on the progress, mechanisms and challenges of graphene application in four main reactions, i.e., oxygen reduction reaction, water splitting, water treatment and Fischer–Tropsch synthesis. This review also summarises the advantages and drawbacks of graphene over other commonly used catalysts. Given the inherent nature of graphene, coupled with its recent accelerated advancement in the synthesis and modification processes, it is anticipated that the application of graphene in catalysis will grow exponentially from its current stage of infancy.

Molecular Cloning of Three UDP-Glucuronate Decarboxylase Genes That Are Preferentially Expressed In Gossypium Fibers From Elongation to Secondary Cell Wall Synthesis

Yuxin Pan,Xingfen Wang,Hengwei Liu,Guiyin Zhang,Zhiying Ma 한국식물학회 2010 Journal of Plant Biology Vol.54 No.5

UDP-xylose (UDP-Xyl) is a nucleotide sugar used as substrate for producing non-cellulose materials, e. g., hemicellulose and pectic polysaccharide, in the fibers of cotton (Gossypium). Its biosynthesis is catalyzed from UDP-glucuronic acid (UDP-GlcA) by UDP-glucuronate decarboxylase (UXS). Here, we first cloned GhUXS1 in Gossypium hirsutum and Gossypium barbadense based on a transcript-derived fragment that originated from our cDNA–AFLP transcriptome profiling in cotton. GhUXS2and GhUXS3 were also isolated via homology-based cloning. GhUXS nucleotide sequences were identical between the two species, and the deduced amino acid residues had the conserved motif of the UXS family, i.e.,GxxGxxG, Ser residues, and YxxxK. GhUXS1 was expressed in Escherichia coli and generated UXS activity that converted UDP-GlcA to UDP-Xyl. Semiquantitative RT-PCR results showed that GhUXSs transcripts were preferentially expressed during fiber development, from elongation through the stage of secondary cell wall synthesis. Although at the same number of days postanthesis they were more abundant in G. hirsutum, expression was sustained for a longer period in G. barbadense. These different patterns of expression may affect quality and partially explain why the latter species has better fiber strength.

Repeat liver resection versus salvage liver transplant for recurrent hepatocellular carcinoma: A propensity score-adjusted and -matched comparison analysis

Yuxin Guo,Ek-Khoon Tan,Nicholas L. Syn,Thinesh-Lee Krishnamoorthy,Chee-Kiat Tan,Reina Lim,Ser-Yee Lee,Chung-Yip Chan,Peng-Chung Cheow,Alexander Y. F. Chung,Prema Raj Jeyaraj,Brian K. P. Goh 한국간담췌외과학회 2019 Annals of hepato-biliary-pancreatic surgery Vol.23 No.4

Backgrounds/Aims: Repeat liver resection (RLR) and salvage liver transplantation (SLT) are viable treatment options for recurrent hepatocellular carcinoma (HCC). With possibly superior survival outcomes than RLR, SLT is however, limited by liver graft availability and poses increased perioperative morbidity. In this study, we seek to compare the outcomes of RLR and SLT for patients with recurrent HCC. Methods: Between 1999 and 2018, 94 and 16 consecutive patients who underwent RLR and SLT respectively were identified. Further retrospective subgroup analysis was conducted, comparing 16 RLR with 16 SLT patients via propensity-score matching. Results: After propensity-score adjusted analyses, SLT demonstrated inferior short-term perioperative outcomes than RLR, with increased major morbidity (57.8% vs 5.4 %, p=0.0001), reoperations (39.1% vs 0, p<0.0001), renal insufficiency (30.1% vs 3%, p=0.0071), bleeding (19.8% vs 2.2%, p=0.0289), prolonged intensive care unit stay (median=4 vs 0 days, p<0.0001) and hospital stay (median= 19.8 vs 7.1days, p<0.001). However, SLT showed significantly lower recurrence rate (15.4% versus 70.3%, p=0.0005) and 5-year cumulative incidence of recurrences (19.4% versus 68.4%, p=0.005). Propensity-matched subgroup analysis showed concordant findings. Conclusions: While SLT offers potentially reduced risks of recurrence and trended towards improved long-term survival outcomes relative to RLR, it has poorer short-term perioperative outcomes. Patient selection is prudent amidst organ shortages to maximise allocated resources and optimise patient outcomes.

Image Nonlinear Resizing Algorithm Based on Salient Region

Yuxin Tian,Shan Liang 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.8

Numerical prediction of vortex and swirl angle analysis in sump models

Yuxin Zhao,Beong-ha Kim,Young-Ho Lee 한국신재생에너지학회 2014 한국신재생에너지학회 학술대회논문집 Vol.2014 No.05

Research on the purchase intention of metaverse music performances based on the theory of perceived value

Yuxin Mao,Rui Cao KOREA INSTITUTE FOR HUMANITIES AND SOCIAL SCIENCES 2023 Journal of Arts and Cultural Studies(ACS) Vol.2 No.2

The digital transformation has enabled the metaverse concept.Metaverse music performances are presented to the public in a new art form by the continuous efforts major enterprises. Purpose: Investigating the purchase intention of metaverse music performances can promote this model. Methods: This paper analyzes the purchase intention of metaverse music performances based on the theory of perceived value. SPSS 24 was used for analysis. Results: Teenagers are willing to consume these performances. Secondly, the functional, emotional, social, price, and environmental values all impact the consumption willingness of performances. Among these, functional, emotional, environmental, and social values positively impact consumption intention. Environmental value is the main reason for consumers' willingness to consume. The Metaverse music performances price value hurts consumer intentions. Conclusion: The enterprises using metaverse for music performances should consider music preformances price value control, The willingness to pay according to the conditional value assessment model and direct inquiry are 166.61 and 161.31 yuan respectively.