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Search Results: 1 - 10 of 8844 matches for " Xueyun Gu "
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Accuracy Analysis on the Automatic Registration of Multi-Source Remote Sensing Images Based on the Software of ERDAS Imagine  [PDF]
Debao Yuan, Ximin Cui, Yahui Qiu, Xueyun Gu, Li Zhang
Advances in Remote Sensing (ARS) , 2013, DOI: 10.4236/ars.2013.22018
Abstract:

The automatic registration of multi-source remote sensing images (RSI) is a research hotspot of remote sensing image preprocessing currently. A special automatic image registration module named the Image Autosync has been embedded into the ERDAS IMAGINE software of version 9.0 and above. The registration accuracies of the module verified for the remote sensing images obtained from different platforms or their different spatial resolution. Four tested registration experiments are discussed in this article to analyze the accuracy differences based on the remote sensing data which have different spatial resolution. The impact factors inducing the differences of registration accuracy are also analyzed.

Research on Pedestrian Detection Technology Based on MSR and Faster R-CNN  [PDF]
Xueyun Zhao, Chaoju Hu
Journal of Computer and Communications (JCC) , 2018, DOI: 10.4236/jcc.2018.67006
Abstract: In order to avoid the problem of poor illumination characteristics and inaccurate positioning accuracy, this paper proposed a pedestrian detection algorithm suitable for low-light environments. The algorithm first applied the multi-scale Retinex image enhancement algorithm to the sample pre-processing of deep learning to improve the image resolution. Then the paper used the faster regional convolutional neural network to train the pedestrian detection model, extracted the pedestrian characteristics, and obtained the bounding boxes through classification and position regression. Finally, the pedestrian detection process was carried out by introducing the Soft-NMS algorithm, and the redundant bounding box was eliminated to obtain the best pedestrian detection position. The experimental results showed that the proposed detection algorithm achieves an average accuracy of 89.74% on the low-light dataset, and the pedestrian detection effect was more significant.
Expression of Acetaldehyde Dehydrogenase in Gefitinib-resistant Human Lung Adenocarcinoma HCC-827/GR Cells
Tingting YANG, Jingjing GU, Ting LIU, Haibin MA, Xiaona MA, Jin TAO, Yiran JIN, Xueyun LIANG
- , 2018, DOI: : 10.3779/j.issn.1009-3419.2018.06.01
Abstract: Background and objective Tumor recurrence and drug resistance are the main causes of death in tumor patients. The family of acetaldehyde dehydrogenase (ALDH) is closely related to the proliferation, migration, invasion and resistance of tumor cells, and different ALDH subtypes are expressed in different tumor cells. The aim of this study is to elucidate the ALDH subtype in human lung adenocarcinoma HCC-827/GR cells, which resistant to the gefitinib. Methods The human lung adenocarcinoma HCC-827 cells were used to generate the gefitinib-resistant HCC-827/GR cells; the expression of ALDH subtype in either HCC-827 or HCC-827/GR was detected by flow cytometry; The proliferative capacity and sensitivity to gefitinib of hcc-827/GR cells were analyzed by MTT assay before and after treatment with 100 μmol/L diethyllaminaldehyde (DEAB); Real-time quantitative PCR was used to detect the expression of ALDH subtypes at mRNA levels in hcc-827 cells and hcc-827/GR cells. Results Compared with HCC-827 cells, the positive rate of ALDH in HCC-827/GR cells increased. The proliferation ability of HCC-827/GR cells decreased after treatment with 100 μmol/L DEAB. Compared with HCC-827 cells, the expression of ALDH1A1 and ALDH1L1 mRNA was increased in hcc-827/GR cells, but the ALDH3B2 expression was decreased. Conclusion ALDH might be used as a molecular biomarker to test the gefitinib-resistant to lung adenocarcinoma cancer cells, and the ALDH1A1 may play a role in gefitinib resistance in lung cancer. ?
Optoelectronic Properties of GaN-Based Light-Emitting Diodes with Different Mesa Structures  [PDF]
Xueyun Song, Xianghua Zeng, Junbin Zhang, Yuzhe Jin, Xiangdong Meng
Materials Sciences and Applications (MSA) , 2012, DOI: 10.4236/msa.2012.312122
Abstract: GaN/InGaN lighting-emitting diodes with different mesa structures are studied. The current-voltage characteristics, light output power, luminous efficiency, and peak wavelength of the GaN/InGaN lighting-emitting diodes with different mesa patterns are compared. It shows that the current-voltage characteristics of the chips with more mesa areas are im- proved greatly by reducing the current crowding. With higher injection current the light output powers of GaN-based LED with more mesa areas are enhanced. And the chips with more P-electrode area have a smaller red shift and a little bit blue shift due to the reduction of the current crowding.
RETRACTED: Long-Term Diverse Fertilizer Management on Weed Species and Communities in Winter Wheat Field  [PDF]
Ni Ni Than, Shulan Zhang, Benhua Sun, Hua Yi, Xueyun Yang
American Journal of Plant Sciences (AJPS) , 2017, DOI: 10.4236/ajps.2017.88122
Abstract:

Short Retraction Notice

The first author didn’t get permission to publish this paper from her supervisor, Prof. Xueyun Yang.

This article has been retracted to straighten the academic record. In making this decision the Editorial Board follows COPE's Retraction Guidelines. The aim is to promote the circulation of scientific research by offering an ideal research publication platform with due consideration of internationally accepted standards on publication ethics. The Editorial Board would like to extend its sincere apologies for any inconvenience this retraction may have caused.

Editor guiding this retraction: Prof. Sukumar Saha (EiC of AJPS).

Please see the article page for more details. The full retraction notice in PDF is preceding the original paper which is marked \"RETRACTED\".

A Factorial Validation of Knowledge-Sharing Motivation Construct  [PDF]
Qinxuan Gu, Yingting Gu
Journal of Service Science and Management (JSSM) , 2011, DOI: 10.4236/jssm.2011.41009
Abstract: While there is increasingly strategic importance in knowledge, it is facing new challenges to manage knowledge effectively. The paper studies the motivational construct model for knowledge sharing from the perspective of content theories and social motivation theories. The data collected by using the questionnaire survey from a variety of industries was analyzed on the basis of interviews and pretest. The results of exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) showed the motivational construct model for knowledge sharing was comprised of existence motivation, relatedness motivation, growth motivation and norm motivation. The results extended the perspectives for knowledge sharing motivation and provided theoretical evidences for facilitating knowledge sharing behavior.
Surface-Enhanced Raman Scattering Study of Silver Nanoparticles Prepared by Using MC as a Template
Yudong Lu,Shanyuan Feng,Xueyun Liu,Lihui Chen
Journal of Nanomaterials , 2013, DOI: 10.1155/2013/984831
Abstract: A good Ag-based SERS substrate has been prepared by one-pot reaction using methyl cellulose as a template. Effects of methyl cellulose concentration, silver ammonia chloride solution concentration, reaction duration, and reducing agent on silver nanoparticles were discussed in this paper. The performance of the obtained Ag nanoparticles was characterized by UV-visible spectroscopy, transmission electron microscopy, and surface-enhanced Raman spectroscopy. Results show that the reducing agent plays a crucial role in the performance of silver nanoparticles. Optimum preparation conditions of synthesis of SERS substrates were as follows: 10?mM silver ammonia chloride and 0.2% MC at 75°C, reducing in 0.2% reducing agent at 120?min. TEM studies reveal that particles are mostly spherical and rod in shape with an average size of 80?nm. Silver nanoparticles prepared with MC as a template have been shown to provide strong SERS enhancement signals of R6G, which can be used as a good Ag-based SERS substrate in the analytical environment for routine measurements. 1. Background Surface-enhanced Raman scattering (SERS) has been known and intensely studied for over 50 years. The possibility of utilizing colloidal dispersions of Ag or Au in aqueous solutions as a method for enhancing Raman scattering was first demonstrated by Creighton et al. in 1979 [1]. In recent years, with the ever-growing knowledge of plasmonic properties of nanomaterials and the constantly improved engineering capability, SERS has been transformed into a useful analytical technique with some significant advantages for sensitive chemical analysis and interfacial studies [2–5]. It is well known experimentally that the most intense SERS signals are obtained from molecules adsorbed to microscopically rough silver surfaces, such as silver colloids and silver nanoparticles of various shapes [6–9]. Since the last decade a large spectrum of research has been focused to control the size and shape, which is crucial in tuning physical, chemical, and optical properties of nanomaterials. A large variety of synthetic approaches have been explored for the preparation of silver nanoparticles with different morphologies, for example, hydrothermal synthesis [10–12], microemulsion [13, 14], electrochemical deposition [15–17], photochemical method [18, 19], γ-ray irradiation, and so forth [20–22]. Among these approaches “soft” templates are commonly used in order to obtain silver nanoparticles with different morphologies. A range of “soft” templates, such as PVP [23, 24], poly (acrylic acid) [25], CTAB [11], SDS
Multi-objective Optimization of Multi-Agent Elevator Group Control System Based on Real-time Particle Swarm Optimization Algorithm  [PDF]
Yanwu Gu
Engineering (ENG) , 2012, DOI: 10.4236/eng.2012.47048
Abstract: In order to get a globally optimized solution for the Elevator Group Control System (EGCS) scheduling problem, an algorithm with an overall optimization function is needed. In this study, Real-time Particle Swarm Optimization (RPSO) is proposed to find an optimal solution to the EGCS scheduling problem. Different traffic patterns and controller mechanisms for EGCS are analyzed. This study focuses on up-peak traffic because of its critical importance to modern office buildings. Simulation results show that EGCS based on Multi-Agent Systems (MAS) using RPSO gives good results for up-peak EGCS scheduling problem. Besides, the elevator real-time scheduling and reallocation functions are realized based on RPSO in case new information is available or the elevator becomes busy because it is unavailable or full. This study contributes a new scheduling algorithm for EGCS, and expands the application of PSO.
Research on the Cultivation of “Managerial” Accounting Talents’ IT Quality  [PDF]
Lingyan Gu
Open Journal of Accounting (OJAcct) , 2012, DOI: 10.4236/ojacct.2012.11002
Abstract: The rapid development of information technology puts forward higher request on the accounting personnel’s IT quality. This paper begins with the analysis about the information technologies which impact on accounting personnel in order to discuss what IT quality should be possessed by accounting personnel. Then according to the target of “managerial” accounting talents cultivation mode, it proposes several suggestions for the university about how to cultivate the “managerial” accounting talents’ IT quality.
The Allocation of Family Guanxi-Oriented Control Rights
—Evidence from Family Listed Companies of Zhejiang China
 [PDF]

Lingyan Gu
American Journal of Industrial and Business Management (AJIBM) , 2014, DOI: 10.4236/ajibm.2014.42016
Abstract:

Different from the market-oriented control mechanism in British and American, the guanxi-oriented control mechanism is a significant feature in Chinese family business. This paper proposes the concept of family guanxi-oriented control rights allocation for the first time. Based on the analysis about the influencing factors of the family guanxi-oriented control rights allocation, we use the sample companies coming from Zhejiang province of China to do further discussion. We find that 1) the actual controllers of Zhejiang family listed companies mainly have blood relationship; 2) parts of companies allocate the control rights between the family members who have more than three kinds of guanxi; 3) the controlling families prefer to control the board of the listed companies; 4) the intergenerational succession of control rights in Zhejiang family listed companies has been highlighted.

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