Ab Initio Study of Mechanism of Forming Spiro-Ge-Heterocyclic Ring Compound From Cl2Ge=Ge: and Formaldehyde

Xiuhui Lu,Yongqing Li,Jingjing Ming 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.12

The H2Ge=Ge: and its derivatives (X2Ge=Ge:, X = H, Me, F, Cl, Br, Ph, Ar……) is a new species. Its cycloaddition reactions is a new area for the study of germylene chemistry. The mechanism of the cycloaddition reaction between singlet state Cl2Ge=Ge: and formaldehyde has been investigated with CCSD(T)//MP2/6-31G* method. From the potential energy profile, it could be predicted that the reaction has only one dominant reaction pathway. The reaction rule presented is that the two reactants first form a fourmembered Ge-heterocyclic ring germylene through the [2+2] cycloaddition reaction. Because of the 4p unoccupied orbital of Ge: atom in the four-membered Ge-heterocyclic ring germylene and the π orbital of formaldehyde forming a π→p donor-acceptor bond, the four-membered Ge-heterocyclic ring germylene further combines with formaldehyde to form an intermediate. Because the Ge: atom in intermediate hybridizes to an sp3 hybrid orbital after transition state, then, intermediate isomerizes to a spiro-Ge-heterocyclic ring compound via a transition state. The research result indicates the laws of cycloaddition reaction between H2Ge=Ge: and formaldehyde, and laid the theory foundation of the cycloaddition reaction between H2Ge=Ge: and its derivatives (X2Ge=Ge:, X = H, Me, F, Cl, Br, Ph, Ar……) and asymmetric π-bonded compounds, which is significant for the synthesis of small-ring and spiro-Ge-heterocyclic compounds. The study extends research area and enriches the research content of germylene chemistry.

Ab Initio Study of Mechanism of Forming Germanic Bis-Heterocyclic Compound between Dimethyl-Germylene Carbene (Me_2Ge=C:) and Acetone

Xiuhui Lu,Xin Che,Zhenxia Lian,Yongqing Li 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.1

The mechanism of the cycloaddition reaction of forming germanic bis-heterocyclic compound between singlet dimethylgermylene carbene and acetone has been investigated with CCSD(T)//B3LYP/6-31G^* method. From the potential energy profile, it can be predicted that, this reaction has one dominant channel. The presented rule of this dominant channel is that the two reactants firstly form a four-membered ring carbene (RC4) through the [2+2] cycloaddition reaction. Due to sp^2 hybridization of carbene C atom in RC4, RC4 further combines with acetone to form a reactant complexe (RC5). Due to the further sp^3 hybridization of carbene C atom in RC4, RC5 isomerizes to a germanic bisheterocyclic compound (P6) via the transition state (TS5).

Small Signal Stability and V-P Control of Islanded AC Microgrid at Constant Frequency

Xiuhui Tang,Daming Zhang 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5

An islanded AC microgrid with V-P controlled power regulation and current regulation at constant frequency is proposed in this paper. Stability feature, control behavior, coefficient influence has been studied to demonstrate the voltage-power droop control method. In summary, active power and current are well regulated, while voltage error is reduced with power coefficient diminution.

체험형 VR 시뮬레이션 플랫폼의 휴리스틱 사용성 평가

딩슈후이(Xiuhui Ding),장영직(Young Jick Jang),윤태수(Tae Soo Yun) 한국콘텐츠학회 2018 한국콘텐츠학회 종합학술대회 논문집 Vol.2018 No.5

Ab Initio Study of Mechanism of Forming Spiro-Ge-Heterocyclic Ring Compound From C₂Ge=Ge: and Formaldehyde

Lu, Xiuhui,Li, Yongqing,Ming, Jingjing Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.12

The $H_2Ge=Ge:$ and its derivatives ($X_2Ge=Ge:$, X = H, Me, F, Cl, Br, Ph, Ar${\ldots}{\ldots}$) is a new species. Its cycloaddition reactions is a new area for the study of germylene chemistry. The mechanism of the cycloaddition reaction between singlet state Cl2Ge=Ge: and formaldehyde has been investigated with CCSD(T)//MP2/$6-31G^*$ method. From the potential energy profile, it could be predicted that the reaction has only one dominant reaction pathway. The reaction rule presented is that the two reactants first form a fourmembered Ge-heterocyclic ring germylene through the [2+2] cycloaddition reaction. Because of the 4p unoccupied orbital of Ge: atom in the four-membered Ge-heterocyclic ring germylene and the ${\pi}$ orbital of formaldehyde forming a ${\pi}{\rightarrow}p$ donor-acceptor bond, the four-membered Ge-heterocyclic ring germylene further combines with formaldehyde to form an intermediate. Because the Ge: atom in intermediate hybridizes to an $sp^3$ hybrid orbital after transition state, then, intermediate isomerizes to a spiro-Ge-heterocyclic ring compound via a transition state. The research result indicates the laws of cycloaddition reaction between $H_2Ge=Ge:$ and formaldehyde, and laid the theory foundation of the cycloaddition reaction between $H_2Ge=Ge:$ and its derivatives ($X_2Ge=Ge:$, X = H, Me, F, Cl, Br, Ph, Ar${\ldots}{\ldots}$) and asymmetric ${\pi}$-bonded compounds, which is significant for the synthesis of small-ring and spiro-Ge-heterocyclic compounds. The study extends research area and enriches the research content of germylene chemistry.

Ab Initio Study of Mechanism of Forming Germanic Bis-Heterocyclic Compound between Dimethyl-Germylene Carbene (Me₂Ge=C:) and Acetone

Lu, Xiuhui,Che, Xin,Lian, Zhenxia,Li, Yongqing Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.1

The mechanism of the cycloaddition reaction of forming germanic bis-heterocyclic compound between singlet dimethylgermylene carbene and acetone has been investigated with CCSD(T)//B3LYP/6-$31G^*$ method. From the potential energy profile, it can be predicted that, this reaction has one dominant channel. The presented rule of this dominant channel is that the two reactants firstly form a four-membered ring carbene (RC4) through the [2+2] cycloaddition reaction. Due to $sp^2$ hybridization of carbene C atom in RC4, RC4 further combines with acetone to form a reactant complexe (RC5). Due to the further $sp^3$ hybridization of carbene C atom in RC4, RC5 isomerizes to a germanic bisheterocyclic compound (P6) via the transition state (TS5).

압델라티브 케시시의 창작 스타일 및 카메라 움직임 분석: 영화 <생선 쿠스쿠수>와 <가장 따뜻한 색, 블루>를 중심으로

이수혜 ( Li Xiuhui ) 한국영화교육학회 2024 영화교육연구 Vol.18 No.1

이 논문은 압델라티브 케시시 감독의 세 편의 영화를 연구 대상으로 하여, 영화가 현실 생활을 기록하고 표현하는 매체로서의 역할과 영화와 리얼리즘, 카메라 움직임과의 관계를 통해 압델라티브 케시시 감독의 창작 스타일을 설명하고자 한다. 프랑스 감독 압델라티브 케시시의 영화 작품을 분석함으로써, 영화가 예술 형태로서의 중요성을 드러내고, 영화 리얼리티를 대표하는 프랑스 사회를 반영하여 현대 사회 문화 소통의 일부를 함축한다. 압델라티브 케시시의 영화는 특수 촬영 기법을 통해 독특한 시각 효과를 창조하는 데 능하다. 그는 자주 핸드헬드 촬영과 트래킹 샷을 사용하여 관객이 이야기에 더 잘 몰입할 수 있도록 하며, 사회 문제, 인간 탐구, 역사적 사건 등 중요한 주제를 연구한다. 압델라티브 케시시의 영화 <생선 쿠스쿠수>, <가장 따뜻한 색, 블루>을 통해, 영화와 카메라 움직임, 리얼리즘과의 관계를 확인하고, 그가 다양한 주제에 대한 깊은 사고와 독특한 표현 방식을 보여준다. This paper aims to explain the directorial style of Abdellatif Kechiche, understanding its characteristics through the relationship between film creation, camera movement, and the aesthetics of realism cinema. Thus, I intend to explore Kechiche's directorial style through two films, The Secret of the Grain and Blue Is the Warmest Color. His style and camera movement are quite unique, combining depth and artistry with strong audiovisual effects and visual impact. Born in Tunisia and emigrated to Nice, France, with his parents at the age of six, Kechiche is a talented director known especially for his works reflecting the lives of the underprivileged immigrants and advocating for social justice. Kechiche's films often reveal the hardships, dreams, and cultural conflicts of immigrant life, presenting a world that is both real and moving to the audience. His movies are not just descriptions of individual fates but are deep explorations of social issues, receiving widespread attention and acclaim both domestically and internationally. The Secret of the Grain and Blue Is the Warmest Color are among his representative works, showcasing class differences and the complexity of human nature. The paper is structured as follows: the first part introduces the research purpose, theme, and background; the second part discusses the relationship between his film creation and the aesthetics of realism cinema; the third part delves into how his film works display his unique visual creation style through camera movement. Kechiche's directorial style is imbued with an inherent sense of realism, dedicating significant effort to character development and emotional expression. Through extended shots and emotive scenes, he immerses the audience into the characters' inner worlds. Both The Secret of the Grain and Blue Is the Warmest Color showcase Kechiche's captivating and unique style, while also offering a profound understanding of realism cinema aesthetics. These films not only move the audience emotionally but also provide deep insights into human nature and society.

Image Generation Method Based on Image Edge Information

Yanqiu Liu,Xiuhui Wang 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.4

An algorithm was proposed to generate automatically embedded image. With the use of outline matching and shape deformation, the proposed method can insert an interior object with partial deformation into an outer object image, having better results by considering the cavity of the outer object. The embedded object is easily observed because its color is opposite to the outer object while the outer object’s cavity can be part of the interior object. By designing method which is applied to express object’s edge strength, the matching result of the algorithm can be optimized.

Gait Recognition Algorithm Based on Feature Fusion of GEI Dynamic Region and Gabor Wavelets

( Jun Huang ),( Xiuhui Wang ),( Jun Wang ) 한국정보처리학회 2018 Journal of information processing systems Vol.14 No.4

The paper proposes a novel gait recognition algorithm based on feature fusion of gait energy image (GEI) dynamic region and Gabor, which consists of four steps. First, the gait contour images are extracted through the object detection, binarization and morphological process. Secondly, features of GEI at different angles and Gabor features with multiple orientations are extracted from the dynamic part of GEI, respectively. Then averaging method is adopted to fuse features of GEI dynamic region with features of Gabor wavelets on feature layer and the feature space dimension is reduced by an improved Kernel Principal Component Analysis (KPCA). Finally, the vectors of feature fusion are input into the support vector machine (SVM) based on multi classification to realize the classification and recognition of gait. The primary contributions of the paper are: a novel gait recognition algorithm based on based on feature fusion of GEI and Gabor is proposed; an improved KPCA method is used to reduce the feature matrix dimension; a SVM is employed to identify the gait sequences. The experimental results suggest that the proposed algorithm yields over 90% of correct classification rate, which testify that the method can identify better different human gait and get better recognized effect than other existing algorithms.

Kernel Fisher Discriminant Analysis for Natural Gait Cycle Based Gait Recognition

Jun Huang,Xiuhui Wang,Jun Wang 한국정보처리학회 2019 Journal of information processing systems Vol.15 No.4

This paper studies a novel approach to natural gait cycles based gait recognition via kernel Fisher discriminantanalysis (KFDA), which can effectively calculate the features from gait sequences and accelerate the recognitionprocess. The proposed approach firstly extracts the gait silhouettes through moving object detection andsegmentation from each gait videos. Secondly, gait energy images (GEIs) are calculated for each gait videos, andused as gait features. Thirdly, KFDA method is used to refine the extracted gait features, and low-dimensionalfeature vectors for each gait videos can be got. The last is the nearest neighbor classifier is applied to classify. The proposed method is evaluated on the CASIA and USF gait databases, and the results show that ourproposed algorithm can get better recognition effect than other existing algorithms.