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Search Results: 1 - 10 of 6674 matches for " Dongxiao Hou "
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1-(2,6-Dichlorobenzoyl)-3-(3-nitrophenyl)thiourea dimethylformamide solvate
Min Li,Dongxiao Hou
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536809055056
Abstract: In the title compound, C14H9Cl2N3O3S·C3H7NO, the two aromatic rings enclose a dihedral angle of 32.93 (12)°. The thiourea molecule exists in its thione form in the solid state with typical C=S and C—N bond lengths. In the crystal, N—H...O hydrogen bonds exist between the thiourea and carbonyl groups on the same and neighboring molecules. In addition, each dimethylformamide solvate molecule forms a hydrogen bond to one N atom of the thiourea group.
Analysis of Vertical-Horizontal Coupling Vibration Characteristics of Rolling Mill Rolls Based on Strip Dynamic Deformation Process
Dongxiao Hou,Rongrong Peng,Haoran Liu
Shock and Vibration , 2014, DOI: 10.1155/2014/543793
Abstract: Nonlinear dynamic rolling forces in the vertical and horizontal directions are, respectively, established, considering the impact of vertical and horizontal directions vibration of rolls. Then a vertical-horizontal coupling nonlinear vibration dynamic model of rolling mill rolls is proposed, based on the interactions between this dynamic rolling force and mill structure. The amplitude-frequency equations of the main resonance and inner resonance are carried out by using multiple-scale method. The characteristics of amplitude frequency under nonlinear stiffness, damping, and amplitude of the disturbance are obtained by adopting the actual parameters of 1780 rolling mills. Finally, the bifurcation behavior of the system is studied, and it is found that many dynamic behaviors such as period, period-3 motion, and chaos exist in rolling mill, and this behavior could be restrained effectively by choosing proper system parameters. 1. Introduction The vibration of rolling mill often occurs in rolling process. The occurrence of vibration not only affects the quality of rolling products, but also leads to breakdown of the rolling equipment. In order to understand the vibration behaviors of mills, a number of models have been developed during the past few decades [1–5]. However, in most open literatures, the vibrations in the horizontal direction and in the vertical direction are studied separately. In recent years, the coupling relationship in rolling mill is proposed; Hu et al. studied the linear vibration characteristics in vertical and horizontal direction [6]. Yang et al. studied the stability of coupling dynamic vertical model of cold rolling mill, which consists of the rolling process model, the mill roll stand structure model, and the hydraulic servo system model [7]. In the process of studying rolling mill vibration, modeling of rolling force directly determines the accuracy of vibration model. In the early years, the rolling force in the rolling process is quasistatic, which assumes that only dynamic variations in roll spacing produce variations in force, strip speed, and strip thickness to those occurring under steady-state conditions [8–10]. Yun et al. proposed a dynamic model of rolling mill, which considers the rate variation of change of the roll spacing. But in order to simplify calculation, he only selected the linear section of rolling force by using Taylor formula [11]. In fact, most of the literatures adopted the method of Yun, by taking the rolling force as a linear factor and neglecting nonlinear section. In this paper, nonlinear dynamic
Proteomic analysis of prolactinoma cells by immuno-laser capture microdissection combined with online two-dimensional nano-scale liquid chromatography/mass spectrometry
Yingchao Liu, Jinsong Wu, Guoquan Yan, Ruiping Hou, Dongxiao Zhuang, Luping Chen, Qi Pang, Jianhong Zhu
Proteome Science , 2010, DOI: 10.1186/1477-5956-8-2
Abstract: Proteins from immuno-LCM captured prolactin cells were digested; resulting peptides were separated by two dimensional-nanoscale liquid chromatography (2D-nanoLC/MS) and characterized by tandem mass spectrometry. All MS/MS spectrums were analyzed by SEQUEST against the human International Protein Index database and a specific prolactinoma proteome consisting of 2243 proteins was identified. This collection of identified proteins by far represents the largest and the most comprehensive database of proteome for prolactinoma. Category analysis of the proteome revealed a widely unbiased access to various proteins with diverse functional characteristics.This manuscript described a more comprehensive proteomic profile of prolactinomas compared to other previous published reports. Thanks to the application of immuno-LCM combined with online two-dimensional nano-scale liquid chromatography here permitted identification of more proteins and, to our best knowledge, generated the largest prolactinoma proteome. This enlarged proteome would contribute significantly to further understanding of prolactinoma tumorigenesis which is crucial to the management of prolactinomas.Prolactinomas are the most common pituitary tumors, representing 25%-44% of all pituitary adenoma cases [1]. Although most are pathologically benign and grow slowly, prolactinomas show many symptoms in patients: amenorrhea, galactorrhea and dysgenesis in female patients and infertility and erectile dysfunction in male. Moreover, a number of prolactinomas belie their histology by perisellar invasion and postoperative recurrence. Comprehensive molecular dissection of prolactinoma pathogenesis is demanded for further understanding of this kind of tumors. Increasing evidences suggest that characterization at DNA or RNA level alone would not be sufficient to elucidate the mechanisms of this disease as lots of posttranslational modifications exist and pituitary adenoma proteomics would offer an efficient means for a com
Estimation of Phytoplankton Responses to Hurricane Gonu over the Arabian Sea Based on Ocean Color Data
Dongxiao Wang,Hui Zhao
Sensors , 2008, DOI: 10.3390/s8084878
Abstract: In this study the authors investigated phytoplankton variations in the Arabian Sea associated with Hurricane Gonu using remote-sensing data of chlorophyll-a (Chl-a), sea surface temperature (SST) and winds. Additional data sets used for the study included the hurricane and Conductivity-Temperature-Depth data. Hurricane Gonu, presenting extremely powerful wind intensity, originated over the central Arabian Sea (near 67.7oE, 15.1oN) on June 2, 2007; it traveled along a northwestward direction and made landfall in Iran around June 7. Before Hurricane Gonu, Chl-a data indicated relatively low phytoplankton biomass (0.05-0.2 mg m-3), along with generally high SST (>28.5 oC) and weak wind (<10 m s-1) in the Arabian Sea. Shortly after Gonu’s passage, two phytoplankton blooms were observed northeast of Oman (Chl-a of 3.5 mg m-3) and in the eastern central Arabian Sea (Chl-a of 0.4 mg m-3), with up to 10-fold increase in surface Chl-a concentrations, respectively. The Chl-a in the two post-hurricane blooms were 46% and 42% larger than those in June of other years, respectively. The two blooms may be attributed to the storm-induced nutrient uptake, since hurricane can influence intensively both dynamical and biological processes through vertical mixing and Ekman Pumping.
The pathway of the interdecadal variability in the Pacific Ocean
Dongxiao Wang,Zhengyu Liu
Chinese Science Bulletin , 2000, DOI: 10.1007/BF02886211
Abstract: Cases of the interdecadal variability in the Pacific Ocean and their evolution were examined in the paper with the statistic methods (CEOF and composite analysis) over the period of 1950–1993. Observations of oceanic temperatures in the upper 400 m revealed an obvious region of the interdecadal signals in the central North Pacific. Such signals propagated southwestward, then subducted to the subtropics. The hypothesized link for interdecadal oceanic variability between the subtropics and the tropics, especially with the western tropical Pacific was unraveled in order to detect the cause of decadal signals in the tropics. The thermal anomalies subducted in the central North Pacific east to the dateline only reach 18°N. There has been no further southward propagation since then due to a certain barrier. The origin of the interdecadal signals in the western tropical Pacific was traced to the southern tropical Pacific. There is a meridional pathway around the dateline where the signals were loaded. These variabilities were in the nature of the thermocline circulation.
Diagnostic analysis on the northern South China Sea winter counter-wind current
Bo Hong,Dongxiao Wang
Chinese Science Bulletin , 2006, DOI: 10.1007/s11434-006-9009-y
Abstract: The winter counter-wind current (also named the South China Sea Warm Current (SCSWC)) in the northern South China Sea (SCS) has been known well for decades, but its mass and momentum origination have not be quantitatively evaluated before. In this paper, the high resolution three-dimensional ocean circulation model is adopted to reproduce the circulation in the northern SCS. The diagnostic analyses are performed to investigate the momentum budget in the northern SCS continental shelf/slope and the momentum propulsion of the SCSWC. It is indicated that the across-shelf pressure gradient and the across-shelf transport are responsible for the formation of the SCSWC, while the along-shelf pressure gradient is balanced by the surface stress, bottom stress, and Coriolis force. The magnitude of the terms in the along-shelf momentum equation is smaller than that in the across-shelf one. The analysis on the momentum budget in the northern SCS will benefit the marine environmental prediction in the future.
Electric Power Customer Positioning Model Based on Decision Tree
Yingchun Guo,Dongxiao Niu
Modern Applied Science , 2009, DOI: 10.5539/mas.v2n2p35
Abstract: The electric power consumer positioning analysis is a very important aspect of the electric power consumer relationship management, and the decision tree is a usual tool to implement classification analysis. Based on the segmentation of electric power consumers, this article mainly discusses how to construct the decision tree of electric power consumer positioning by ID3 algorithm, introduce this concrete operation process, and accordingly offers technical supports for the electric power marketing department to better hold consumer characters and implement individual services.
Application Research on Activity Based Costing in a Trading Company
Chengfeng Long,Dongxiao Niu
International Journal of Business and Management , 2009,
Abstract: This article introduces the basic ideas of activity based costing (ABC), and studies how the ABC method is implemented in A Trading Company combining the actual situation of this company. The research results have some reference values for the company which takes trading as its main business.
Researches on Knowledge-Enabled Customer Relationship Management in Electric Power Enterprises
Yingchun Guo,Dongxiao Niu
International Journal of Business and Management , 2009,
Abstract: Along with enhancing competition in electric power market, the business idea and management mode in electric power enterprises are changing from power supply and management to electric power marketing service gradually. Constructing knowledge-enabled customer relationship management system in electric power enterprises and optimizing customer services are important ways to realize the “customer-centered” business idea. This paper discusses the customer relationship management (CRM) system based on knowledge in electric power enterprises, researching how to mine useful information for enterprise decision from amounts of customer data and provide important support for decisions in modern electric power enterprises. In this paper, authors firstly study the idea and process of knowledge mining and knowledge management in CRM, and then research its application in electric power enterprises.
An Analysis Model of Power Customer Satisfaction Based on the Decision Tree
Yingchun Guo,Dongxiao Niu
International Journal of Business and Management , 2009,
Abstract: Power enterprises are facing fierce competition in their shares in customers. In this situation, it shouldn’t be neglected how to intensify their customer relationship management. Positive customer relationship depends on their satisfaction with the products and service provided by the power enterprises. Therefore, an analysis on customer satisfaction seems to be particularly important. With a reasonable evaluation index system about power customer satisfaction, this article puts forward an analysis model of customer satisfaction based on the decision tree, hence providing a new method to know about customer satisfaction. This method will not only help to evaluate the satisfaction degree of the customer, but expose some major problems and solutions in the improvement of customer satisfaction.
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