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Informed Trading, Heterogeneity Investment, Liquidity Shocks and the Valuation of Credit Default Swaps

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Journal of Shanghai Jiaotong university(Science) 2016年第1期21卷 69-80页

作者：杨星范纯李刚 college of Economics Jinan University Institute of Finance Yuexiu Financial Holdings Group Co. Ltd.

This paper explores the effect of informed trading, heterogeneity investment and liquidity shocks on the valuation of credit default swaps(CDSs). Under the condition of asymmetric information, the informed trading plays an important role in the valuation of CDS. Instruction order flow has a significant influence on CDS *** the scope of influence changes in accordance with different time interval, company status and the size of bid-ask spread. Heterogeneity of investors seriously affects the market liquidity and subsequently affects the CDS price. The bigger heterogeneity of the investment philosophy, investment habits, investment preference and so on is the bigger risk for market liquidity, and the higher price for CDS shall be. On the contrary, the conclusion is also consistent. The effectiveness of liquidity, whether it is before or after the financial crisis, dominates the fluctuation of CDS price. The premium of liquidity accounts for 36% to 50% of the CDS price.

关键词： informed trading heterogeneity investment liquidity shocks valuation of credit default swaps

Thermo-economic analysis of a direct supercritical co_(2) electric power generation system using geothermal heat

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Frontiers in Energy 2022年第2期16卷 246-262页

作者： Xingchao WANG Chunjian PAN Carlos EROMERO Zongliang QIAO Arindam BANERJEE Carlos RUBIO-MAYA Lehua PAN Department of Mechanical Engineering Colorado School of MinesGoldenCO 80401USA National Renewable Energy Laboratory(NREL) GoldenCO 80401USA Energy Research Center Lehigh UniversityBethlehemPA 18015USA Key Laboratory of Energy Thermal conversion and control of the Ministry of Education Southeast UniversityNanjing 210096China Department of Mechanical Engineering and Mechanics Lehigh UniversityBethlehemPA 18015USA Mechanical Engineering Universidad Michoacán de San Nicolas de HidalgoMoreliaMichoacán C.P.58030Mexico Energy Geosciences Division Lawrence Berkeley National LaboratoryUniversity of CaliforniaBerkeleyCA 94720USA

A comprehensive thermo-economic model combining a geothermal heat mining system and a direct supercritical co_(2) turbine expansion electric power generation system was proposed in this *** by this integrated model,thermo-economic and optimization analyses for the key design parameters of the whole system including the geothermal well pattern and operational conditions were performed to obtain a minimal levelized cost of electricity(LcoE).Specifically,in geothermal heat extraction simulation,an integrated wellbore-reservoir system model(T2Well/Eco_(2)N)was used to generate a database for creating a fast,predictive,and compatible geothermal heat mining model by employing a response surface methodology.A parametric study was conducted to demonstrate the impact of turbine discharge pressure,injection and production well distance,co_(2) injection flowrate,co_(2) injection temperature,and monitored production well bottom pressure on LcoE,system thermal efficiency,and capital *** was found that for a 100 MWe power plant,a minimal LcoE of$0.177/kWh was achieved for a 20-year steady operation without considering co_(2) sequestration *** addition,when co_(2) sequestration credit is$1.00/t,an LcoE breakeven point compared to a conventional geothermal power plant is achieved and a breakpoint for generating electric power generation at no cost was achieved for a sequestration credit of $2.05/t.

关键词： geothermal heat mining supercritical co_(2) power generation thermo-economic analysis optimization

Alternative 3D Modeling Approaches Based on complex Multi-Source Geological Data Interpretation

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Transactions of Tianjin University 2014年第1期20卷 7-14页

作者：李明超韩彦青缪正建高伟 State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin University Tianjin Dredging co. Ltd

Due to the complex nature of multi-source geological data, it is difficult to rebuild every geological structure through a single 3D modeling method. The multi-source data interpretation method put forward in this analysis is based on a database-driven pattern and focuses on the discrete and irregular features of geological data. The geological data from a variety of sources covering a range of accuracy, resolution, quantity and quality are classified and integrated according to their reliability and consistency for 3D modeling. The new interpolation-approximation fitting construction algorithm of geological surfaces with the non-uniform rational B-spline(NURBS) technique is then presented. The NURBS technique can retain the balance among the requirements for accuracy, surface continuity and data storage of geological structures. Finally, four alternative 3D modeling approaches are demonstrated with reference to some examples, which are selected according to the data quantity and accuracy specification. The proposed approaches offer flexible modeling patterns for different practical engineering demands.

关键词： multi-source data geological data interpretation interpolation-approximation fitting 3D geological sur-face modeling

Distribution Properties of Internal Air Voids in Ultrathin Asphalt Friction course

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Journal of Wuhan University of Technology(Materials Science) 2023年第3期38卷 538-546页

作者：林宏伟杜晓博 ZHONG Changyu WU Ping LIU Wenchang SUN Mutian ZHANG Hongchao Key Laboratory of Road and Traffic Engineering of Ministry of Education Tongji UniversityShanghai 201804China Postdoctoral Station of Mechanical Engineering Tongji UniversityShanghai 201804China Guangzhou Highway Engineering Group co. LtdGuangzhou 510075China Inner Mongolia Road and Bridge Group co. LtdHohhot 010051China

The distribution characteristics of air voids in ultrathin asphalt friction course(UAFC) samples with different gradations and compaction methods were statistically analyzed using X-ray computed tomography(CT) and image analysis techniques. Based on the results, compared with the AC-5 sample, the OGFC-5mixture has a higher air void ratio, a larger air void size and a greater number of air voids, with the distribution of internal air voids being more uniform and their shapes being more rounded. The two-parameter Weibull function was applied to fit the gradation of air voids. The fitting results is good, and the function parameters are sensitive to changes in both mineral gradation and compaction method. Moreover, two homogeneity indices were proposed to evaluate the compaction uniformity of UAFC samples. compared with the Marshall method,the SGC method is more conducive to improve the compaction uniformity of UAFC samples. The compaction method significantly influences the air void distribution characteristics and compaction uniformity of AC-5sample, but has a less significant impact on OGFC-5 sample. The experimental results in the study provides a solid foundation for further explorations on the internal structure and mixture design of UAFC.

关键词： ultrathin asphalt friction course air void characterization air void gradation homogeneity evaluation X-ray CT

Research on the Critical Buckling Pressure of Bucket Foundations with Inner compartments for Offshore Wind Turbines

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Journal of Ocean University of China 2023年第2期22卷 419-428页

作者： SUN Guodong LIU Run LI Qingxin HUANG Guoyu ZHOU Zhenbo ZHANG Cheng State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China Southern Offshore Wind Power Joint Development co. Ltd.Zhuhai 519080China Changjiang Survey Planning Design and Research co. Ltd.Wuhan 430010China

In the process of suction penetration of bucket foundations with inner compartments for offshore wind turbines,most researches focus on soil seepage failure and soil plugs,while the buckling of foundations is rarely ***,theoretical calculation methods for critical buckling pressures of the skirt and bulkheads of the bucket foundation are first presented according to the stability theory of a cylindrical shell and the small deflection theory of a thin plate,***,two types of models with and without considering the skirt-soil interaction are developed for the calculation of critical buckling pressure of the bucket *** a practical project as an example,theoretical and numerical methods are used to obtain the critical buckling pressures of a bucket *** this work,the theoretical method and the finite element model considering the skirt-soil interaction for calculating the critical buckling pressure of bucket foundations are firstly *** results can help to optimize the design process of offshore wind turbine foundations and improve the safety of offshore wind power systems.

关键词： offshore wind power bucket foundation suction penetration critical buckling pressure

Preparation of Incompact Strontium Aluminate Phosphors

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Journal of Rare Earths 2004年第Z1期22卷 149-152页

作者： Luo Xixian Xiao Zhiguo Xia Wei Cao Wanghe Photoelectron Technology Institute Dalian Maritime University Dalian 116026 China Dalian Luming Light Science & Technology co. Ltd.Dalian 116025 China Dalian Luming Light Science & Technology Co. Ltd.Dalian 116025 China Dalian Luming Light Science & Technology Co. Ltd.Dalian 116025 China Photoelectron Technology Institute Dalian Maritime University Dalian 116026 China

The incompact long afterglow pigment SrAl2O4: Eu, Dy was synthesized by ceramics *** agglomerated starting raw material had little effect on the synthesis of SrA12O4 matrix through solid-state reaction method,but the shrinkage and densification was retarded greatly by the agglomerated powder by the formation of large and extensive pore *** sintering mechanism is surface diffusion ( without flux B2O3 ) and grain boundary diffusion (with B2O3 as flux)respectively, and the as-prepared long afterglow pigment glows in the dark for over 4000 min.

关键词： long afterglow strontium aluminate rare earths

Numerical Investigation of an Oscillating Airfoil using Immersed Boundary Method

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Journal of Thermal Science 2011年第5期20卷 413-422页

作者： Guohua Zhong Lin Du Xiaofeng Sun Aviation China Engineering General Electric Co. Shanghai 201203 China School of Jet Propulsion Beihang University B eijing 100191 China

Based on the immersed boundary method, a numerical simulation for an oscillating airfoil is established and a preliminary analysis of the oscillating airfoil is presented with an emphasis on the physical understanding of fluid-structure interaction. In order to validate the method, two simulation cases： oscillating circular cylinder at low K-C number and two degrees of freedom oscillating cylinder are carded out first and the results are in good agreement with the previous re：searches. In the oscillating airfoil simulation, it is found that the reduced velocity U^＊. is a very sensitive factor and especially U^＊-2.8 is the critical stable boundary in the present work. The method shows the predominance of time saving in computational process for such a complicated fluid-structure interac- tion problem.

关键词： turbomachinery IB method fluid-structure interaction.

Effect of co addition on crystallization and magnetic properties of FeSiBPCu alloy

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Progress in Natural Science:Materials International 2014年第6期24卷 649-654页

作者： Rui Xiang Shaoxiong Zhou Bangshao Dong Guangqiang Zhang Zongzhen Li Yanguo Wang Chuntao Chang China Iron & Steel Research Institute Group Advanced Technology & Materials Co. Ltd. Institute of Physics Chinese Academy of Sciences PO Box 603 Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences

The effects of co addition on the microstructure,crystallization processes and soft magnetic properties of(Fe1 xcox)83Si4B8P4Cu1(x?0.35,0.5,0.65)alloys were *** experimental results demonstrated that the addition of co decreased the thermal stability against crystallization of the amorphous phase,and thus improved the heat treatment temperature of this *** co Si BPCu nanocrystalline alloys with a dispersedα0-Fe co phase were obtained by appropriately annealing the as-quenched ribbons at 763 K for 10 ***α0-Fe co with grains size ranging from 9 to 28 nm was identified in primary *** coercivity(Hc)markedly increased with increasing x and exhibited a minimum value at x0.35,while the saturation magnetic flux density(Bs)shows a slight ***(Fe0.65co0.35)83Si4B8P4Cu1nanocrystalline alloy exhibited a high saturation magnetic flux density Bsof 1.68 T,a low coercivity,Hcof 5.4 A/m and a high effective permeability meof 29,000 at 1 k Hz.

关键词： Crystallization Soft magnetic properties Microstructure High temperature Nanocrystalline alloy

Characterizing and Analyzing the Airflow Field inside the Nozzle Block of Murata Vortex Spinning

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Journal of Donghua University(English Edition) 2008年第6期25卷 670-675页

作者：竺韵德邹专勇邬建明薛文良程隆棣 Ningbo Yunsheng co. Ltd Key Laboratory of Textile Science & Technology Ministry of EducationDonghua University

A three-dimensional computational fluid dynamics model is developed by software Fluent 6.2, to simulate the flow field inside the nozzle block of the Murata vortex spinning. The flowing state and the distribution law of static pressure and velocity are characterized and analyzed. The relationship between the flowing state and the structure of the vortex spun yarn is also discussed. The research results can enhance the understanding of the yarn formation principle from viewpoint of the airflow field law inside the nozzle block of Murata vortex spinning.

关键词： murata vortex spinning nozzle block flow field simulation yarn formation