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Search Results: 1 - 10 of 44528 matches for " Xiaoyu Wu "
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The Impact of Electronic Banking on the Credit Risk of Commercial Banks
—An Empirical Study Based on KMV Model
 [PDF]

Zheng Zhao, Yue Lan, Xiaoyu Wu
Journal of Mathematical Finance (JMF) , 2016, DOI: 10.4236/jmf.2016.65054
Abstract: Due to the birth of the age of Big Data and the development of Internet finance, electronic banking has been booming. With the application of descriptive statistics, KMV model, panel data regression and robustness testing, this paper examines the validity of KMV model as a measurement of the credit risk of financial institutions, and reveals the impact of electronic banking on the credit risk of commercial banks. The findings are as follows: First, the default distance based on the KMV model can well reflect the credit risk of banks; Second, the growing electronic banking may increase the credit risk, considering the lack of governmental and industrial regulation; At last, the credit risk of banks under different systems have their unique characteristics, so that a clearly defined division of responsibilities for risk control and supervision is needed.
The Effect of Initial Oxidation on Long-Term Oxidation of NiCoCrAlY Alloy  [PDF]
Chao Zhu, Xiaoyu Wu, Yuan Wu, Gongying Liang
Engineering (ENG) , 2010, DOI: 10.4236/eng.2010.28077
Abstract: The initial oxidation behavior of Ni-6.5Co-17.8Cr-3.7Al-0.5Y alloy is investigated at 800°C-1000°C. X-ray diffraction results show that the dominant Cr2O3 phase and secondary α-Al2O3 and NiO phases are observed on the surface of samples at all initial stages (oxidized for 16 hours). YAlO3 and θ-Al2O3 can only be detected at low temperature (800°C) while the spinel NiCr2O4 is only observed at 900°C and 1000°C. Though the growth rates of α-Al2O3 and Cr2O3 are comparable at 900°C, the former becomes much lower than the latter when the temperature changes to 1000°C. Scanning electron microscopy (SEM) images show that the α-Al2O3 grows from some irregular ditches in the chromia scale at 900°C. However, cracking and spalling are more serious at 1000°C without α-Al2O3-grown-ditches, which is in accordance with the growth rates of these oxides at different temperatures. The cracking can be explained by the results of Raman determination which indicate that the stress on the surface of specimen oxidized at 1000°C is higher than that at 900°C. Owing to this condition, a preoxidation treatment on the NiCoCrAlY alloy for 16 hours is prepared at 900°C, and then thermal cycling oxidation test is conducted at 1000°C for 200 hours. The result indicates that the initial preoxidation treatment at 900°C improves the oxidation resistance of alloy at 1000°C.
Experimental study on bending constitutive relation of steel box-concrete combined member
Wenjuan Yao,Wu Yang,Xiaoyu Liu
International Journal of Computer Science Issues , 2013,
Abstract: According to the direct homogenization theory of inhomogeneous material, a single medium homogenization constitutive model of the confined concrete in the steel box-concrete combined member has been established, and model parameters have been determined by the measured data of the bending test. By analyzing the theoretical ultimate strength and overall process curve, the results obtained is consistent with the curve measured by the test, which proves the bending constitutive relation of steel box-concrete combined member is correct.
Effect of Different Irradiation Times on the Occlusion of Dentinal Tubules When Using a Nd:YAG Laser: An in Vitro SEM Study  [PDF]
Xiaoyu Guo, Jinhua Yu, Roger J. Smales, Huifen Chen, Haiyan Si, Younong Wu
Open Journal of Stomatology (OJST) , 2015, DOI: 10.4236/ojst.2015.53011
Abstract: Objective: To evaluate the effect of different irradiation times on the occlusion of dentinal tubules when using Nd:YAG laser. Background data: Dentin hypersensitivity is a frequent problem that has limited treatment success despite many chemical and physical therapies. Methods: Four coronal dentin disks 2 mm thick were cut with a low-speed diamond saw from four freshly extracted intact first molars. The coronal dentin surface of each disk was divided into four regions, each approximately 2 mm × 3 mm. The dentin surfaces were treated with 27% EDTA then the four regions irradiated separately in a randomized pattern with a Nd:YAG laser (120 mJ, 5 Hz), using irradiation times of 0 s, 20 s, 40 s and 60 s, representing laser energies of 0 J/cm2, 200 J/cm2, 400 J/cm2 and 600 J/cm2, respectively. SEM photomicro-graphs were taken at 1500× and 3000× to calculate the dentinal tubule orifice occlusion rates and to measure the tubule diameters, respectively. Results: For the laser irradiation times of 0 s, 20 s, 40 s and 60 s, the corresponding dentinal tubule occlusion rates were 2.05 (SD 0.29)%, 10.01 (1.71)%, 23.58 (2.51)% and 90.23 (2.24)%, respectively; and the tubule diameters were 4.18 (0.32) μm, 3.46 (0.24) μm, 1.69 (0.32) μm and 0.12 (0.02) μm, respectively. There were significant differences among all groups for both measured variables (p ≤ 0.005). Conclusions: Within the limitations of this in Vitro study, when using a Nd:YAG laser at 120 mJ and 5 Hz, an irradiation time of 60 s achieved the best sealing of the coronal dentinal tubule orifices.
Efficiency and Advantages of Percutaneous Femoroplasty versus Proximal Femoral Replacement for Proximal Femur Metastases  [PDF]
Jinming Zhang, Jianfa Xu, Ze Li, Xiaoyu Zhang, Hongzeng Wu, Helin Feng
Open Journal of Orthopedics (OJO) , 2018, DOI: 10.4236/ojo.2018.810038
Abstract: Background: The proximal femur is the most common site of bone metastasis, and metastasis at this site can cause chronic, intolerable pain and even result in pathologic fractures, thereby negatively affecting patients’ quality of life. Selecting an appropriate method for resecting metastasis within the proximal femur requires thorough consideration of various factors, including the biological behavior of the primary tumor, the extent of the femur lesion, the current general systemic condition of the patient, and perioperative risks. Objective: To compare the perioperative safety of and early functional recovery following percutaneous femoroplasty (PFP) and proximal femoral replacement (PFR) in treating patients with metastasis of the proximal femur. Methods: We retrospectively analyzed the cases of 53 patients with proximal femur metastases who received surgical treatment by either PFP (n = 28) or PFR (n = 25). Perioperative blood loss, surgical time, and perioperative complications were compared between groups. Pain intensity according to the visual analogue scale (VAS) and early postoperative function according to the Karnofsky Performance Scale (KPS) were evaluated at 3, 7, and 30 days as well as 6 months after surgical treatment. Results: In the PFP group, the VAS scores were lower soon after operation than preoperation (P < 0.05). In the PFR group, compared with the preoperative scores, the VAS scores briefly increased at 3 days postoperation (P < 0.05) and then decreased (P < 0.05). The mean scores of either group at first three follow-up evaluations were significantly different between the two groups (P < 0.01), but not at the 6-month follow-up (P > 0.05). PFP significantly and immediately improved patients’ quality of life as measured by the KPS in the early period after surgery (preoperative vs 3 days postoperative, P < 0.01), but the patients who underwent PFR suffered a short-term decrease in quality of life (preoperative vs 3 days postoperative, P < 0.01). Blood loss (P < 0.01) and operating time (P < 0.01) were significantly less than PFP. The complication rate was higher in the PFR group (28%) than in the PFP group (3.6%). The results also showed no difference in survival time between the two groups. Conclusion: PFP is an attractive minimally invasive therapeutic option for proximal femur metastasis that can significantly improve the patient’s quality of life in the short term.
Strength of Intramolecular Hydrogen Bonds
Strength of Intramolecular Hydrogen Bonds

JIANG Xiaoyu,WU Wei,MO Yirong,()
- , 2018, DOI: 10.3866/PKU.WHXB201708174
Abstract: The concept of resonance-assisted hydrogen bonds (RAHBs) highlights the synergistic interplay between the π-resonance and hydrogen bonding interactions. This concept has been well-accepted in academia and is widely used in practice. However, it has been argued that the seemingly enhanced intramolecular hydrogen bonding (IMHB) in unsaturated compounds may simply be a result of the constraints imposed by the σ-skeleton framework. Thus, it is crucial to estimate the strength of IMHBs. In this work, we used two approaches to probe the resonance effect and estimate the strength of the IMHBs in the two exemplary cases of the enol forms of acetylacetone and o-hydroxyacetophenone. One approach is the block-localized wavefunction (BLW) method, which is a variant of the ab initio valence bond (VB) theory. Using this approach, it is possible to derive the geometries and energetics with resonance shut down. The other approach is Edmiston’s truncated localized molecular orbital (TLMO) technique, which monitors the energy changes by removing the delocalization tails from localized molecular orbitals. The integrated BLW and TLMO studies confirmed that the hydrogen bonding in these two molecules is indeed enhanced by π-resonance, and that this enhancement is not a result of σ constraints.
The concept of resonance-assisted hydrogen bonds (RAHBs) highlights the synergistic interplay between the π-resonance and hydrogen bonding interactions. This concept has been well-accepted in academia and is widely used in practice. However, it has been argued that the seemingly enhanced intramolecular hydrogen bonding (IMHB) in unsaturated compounds may simply be a result of the constraints imposed by the σ-skeleton framework. Thus, it is crucial to estimate the strength of IMHBs. In this work, we used two approaches to probe the resonance effect and estimate the strength of the IMHBs in the two exemplary cases of the enol forms of acetylacetone and o-hydroxyacetophenone. One approach is the block-localized wavefunction (BLW) method, which is a variant of the ab initio valence bond (VB) theory. Using this approach, it is possible to derive the geometries and energetics with resonance shut down. The other approach is Edmiston's truncated localized molecular orbital (TLMO) technique, which monitors the energy changes by removing the delocalization tails from localized molecular orbitals. The integrated BLW and TLMO studies confirmed that the hydrogen bonding in these two molecules is indeed enhanced by π-resonance, and that this enhancement is not a result of σ constraints
Are Hong Kong Investors Interested in Shenzhen-Hong Kong Stock Connect
—An Investor Behavior Analysis Based on Shanghai-Hong Kong Stock Connect
 [PDF]

Xiaoyu Liao
Open Journal of Social Sciences (JSS) , 2016, DOI: 10.4236/jss.2016.43036
Abstract: In November 2014, Shenzhen-Hong Kong Stock Connect was opened. It has been more than one year until now. Although its transaction is not as expected, the opening of Shenzhen-Hong Kong Stock Connect is a must. Hong Kong investors investing in the A-share market in the Chinese mainland by Shenzhen-Hong Kong Stock Connect are mainly small- and medium-sized institutional investors who have not obtained QFII quota. Through the analysis of their investment behaviors, we have found that the preference of Hong Kong investors is single and concentrated. They extremely prefer financial blue-chip AH share. They will try to invest in growth stock in the unfamiliar A-share market, mainly mid cap stock with relatively high valuation, relatively low dividend, a certain risk and relatively good growth ability. They prefer information technology shares. The opening of Shenzhen-Hong Kong Stock Connect will bring opportunities different from those of Shenzhen-Hong Kong Stock Connect.
Study on the Recommended Model Based on Personal Information System  [PDF]
Xiaoyu Dai
Journal of Computer and Communications (JCC) , 2018, DOI: 10.4236/jcc.2018.610004
Abstract: This paper classifies the scenario elements which affect the real-time information needs of mobile commerce users, and proposes a nomination model that integrates the user’s personalized context elements. In this model, the top K scenarios that have the greatest impact on each user’s instant information demands are calculated from the user’s current scenario and historical data, thereby constructing a user personalized situation and improving it as an input condition that existing scenario-based multi-dimensional information recommendation algorithm is used for project nomination. Result/Conclusion: The improved algorithm and other three algorithms were compared by Movie lens and MBook Crossing dataset. The experimental results show that the model has higher prediction accuracy and can effectively improve user satisfaction and more effectively and solve personalized nomination issues in a mobile commerce environment.
Nuo Dance of Jiangxi: From the Community Dance to Ritual Significance in Catherine Bell’s Model  [PDF]
Xiaoyu Yang
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.611018
Abstract: The study focuses on the ritual phenomena in the traditional local Chinese community dance Nuo in Jiangxi, China. Catherine Bell’s (1953-2008) model for ritual theory and ritual Practices is applied to this study, as she starts her career from a study of Chinese local Taoist religion and ritual studies. Nuo Dance is a popular form of primitive community dance in Jiangxi Province, China, as its religious ritual features are significant.
Oligomerization study of NHR3 and NHR4 domains from ETO protein involved in t(8;21)-associated acute myeloid leukemia
Wu Donghui,Yang Haitao,Xue Xiaoyu,Liang Wenxue,Miao Xiaoyu,Chen Saijuan,Pang Hai
Chinese Science Bulletin , 2005, DOI: 10.1007/BF02897381
Abstract: Little had been known about ETO protein until t(8;21) was found in 12%–15% of acute myeloid leukemia which resulted in AML1-ETO fusion protein. ETO protein has four conserved nervy homology regions termed NHR1-4. A lot have already been known about NHR 1,2,4: NHR1 is homologous with theDrosophila TATA-box-associated factor 110 (TAF110); NHR2 is a dimerization domain associated with mSin3A/HDAC; NHR4 is MYND class of zinc fingers associated with NCoR/SMRT/HDAC. Only the function of NHR3 remains unclear. In order to investigate whether NHR3 domain could participate in oligomerization, we cloned and purified this domain. Through gel filtration chromatography, dynamic light scattering and dissolved crystal electrophoresis, we found that NHR3 domain was a tight tetramer. Then we cloned NHR3+4 domain (i.e. NHR3 domain plus NHR4 domain), and discovered, by gel filtration chromatography and native PAGE, that NHR3+4 domain could form dimer in solution. This was the first time to observe that NHR3 and NHR4 domains may have some contribution to the oligomerization of ETO protein, which might recruit corepressors in the form of dimer, and stabilize ETO dimerization through convergent strength of NHR2, NHR3 and NHR4 domains and then stabilize corepressors recruitment. These speculations are very worthy of further evaluation.
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