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CCT and TTT Diagrams to Characterize Crystallization Behavior of Mold Fluxes

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Journal of Iron and Steel Research International 2008年第4期15卷 32-37页

作者： WEN Guang-hua liu hui TANG ping College of Materials Science and Engineering Chongqing University Chongqing 400044 China

The isothermal and non-isothermal experiments were performed to construct the continuous cooling transformation （CCT） and temperature time transformation （TTT） diagrams of four industrial mold fluxes through visual observations in an experimental apparatus based on the single hot thermocouple technique （SHTT）. The results of the CCT diagrams indicate that ① the crystallization temperature of mold fluxes lowers as the cooling rate increases, ② the mold fluxes have larger critical cooling rate, higher crystallization temperature, and less onset time of crystallization when the basicity increases or the viscosity decreases, ③ the influences of the melting points of the mold fluxes on their crystallization tendency are not significant. Isothermal tests show that the onset time of crystallization decreases at first, and then increases, and finally represents a ＂C＂ shape with increasing isothermal temperature. The TTT diagrams of four industrial mold fluxes were divided into two separate ＂C＂ shape regions. The crystal phase of C20A selected was analyzed by X-ray diffraction, which is cuspidine （Ca4 Si2 O7F2 ） over I 100 ℃ and calcium silicon oxide fluoride （Ca2SiO2F2） below 1 100℃. When compared with the TTT diagram, the CCT diagram can provide a more realistic estimate of the critical cooling rate of the mold fluxes. Thus, both the CCT and TTT diagrams can unambiguously describe the crystallization phenomena of the mold fluxes.

关键词： mold flux CCT TTT critical cooling rate crystallization

Video-assisted thoracic surgery―the past, present status and the future

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2006年第2期7卷 118-128页

作者： LUH Shi-ping liu hui-ping Department of Cardiothoracic Surgery Taipei Tzu Chi Medical University Hospital Taiwan 231. China Department of Cardiothoracic Surgery Taipei Chang Gung Memorial Hospital Taiwan 231 China

Video-assisted thoracic surgery (VATS) has developed very rapidly in these two decades, and has replaced conven-tional open thoracotomy as a standard procedure for some simple thoracic operations as well as an option or a complementary procedure for some other more complex operations. In this paper we will review its development history, the present status and the future perspectives.

关键词： Video-assisted thoracic surgery (VATS) Pneumothorax Empyema Lung cancer Esophagus Mediastinum

Anomalous Optical and Electronic Properties of CaTiO3 Perovskites

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Communications in Theoretical Physics 2007年第3X期48卷 563-570页

作者： liu hui-ping DUAN Yi-Feng YI Lin Department of Physics and State Key Laboratory of Laser Technology Huazhong University of Science and TechnologyWuhan 430074 China

With the help of the first-prlnciples full potential linearized augmented plane wave method, absorption coefficients, reflect/vity, dielectric behavior and electronic properties, including electronic energy bands, density of states and charge density distributions, are studied for the tetragonal and cubic CaTiO3. By considering the thermal expansion effects, an approximate method is proposed for the study of the stability of ground state and a tendency of phase transition, based on the minimum free energy principle. Subsequently, numerical calculations are carried out by using the first-principles perturbation method. We demonstrate that the high-temperature phase is cubic. It is shown that optical spectra in tetragonal phase exhibit single-peak feature and differ from multi-peak character in cubic. We find that strong orbital hybridization results in the co-valent bonds between Ti 3d and O 2p electrons and forms two-type dipoles （Ti-Ol and Ti-02） in tetragonal, while the Ti-O dipoles are identical in cubic. It is argued that crystal structure determines the dipole distributions and leads to some electron states among which the dipole-dipole transit/on forbidden is a key, causing such anomalous optical phenomena with the insulator characteristics. The predicted charge density distribution and the tendency of phase transition from tetragonal to cubic are in good agreement with experimental observations.

关键词： first-principles calculations CaTiO3 perovskites optical and electronic properties

Monte Carlo Study of Planar Rotator Model with Weak Dzyaloshinsky-Moriya Interaction

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Communications in Theoretical Physics 2006年第4X期46卷 663-667页

作者： SUN Yun-Zhou liu hui-ping YI Lin Department of Physics and State Key Laboratory of Laser Technology~ Huazhong University of Science and Technology Wuhan 430074 China

With the help of an improvement Monte Carlo method, the Berezinskii-Kosterlitz-Thouless phase transition arising in two-dimensional planar rotator model with weak Dzyaloshinsky-Moriya （DM） interaction is investigated. The effects of the DM interaction on specific heat, susceptibility, and magnetization are simulated. The critical temperature of transitions is determined by the so-called Binder cumulant and the susceptibility of finite-size scaling. We find that the chiral Z2 symmetry reduced by the DM interactions plays an important role in a two-dimensional XY spin system, typically, the critical temperature is sensitive to weak DM spin couplings.

关键词： Monte Carlo method Berezinskii-Kosterlitz-Thouless phase transition Dzyaloshinsky-Moriya interaction XY model

Sheath Criterion for a Collisional Electronegative Plasma Sheath in an Applied Magnetic Field

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Chinese Physics Letters 2011年第12期28卷 191-194页

作者： ZOU Xiu liu hui-ping QIU Ming-hui SUN Xiao-Hang School of Science Dalian Jiaotong UniversityDalian 116028 Department of Physics Mathematics and Physics Science Class Tsinghua UniversityBeijing 100084

The sheath criterion for a collisional electronegative plasma sheath in an applied magnetic field is *** is assumed that the system consists of hot electrons,hot negative ions and cold positive *** effect of an applied magnetic field on the sheath criterion is *** results reveal that the magnetic field has effects on both the upper and lower limits,which cause the range of the ion Mach number to *** addition,the numerical calculations of the electronegative plasma sheath are carried out to demonstrate the effects of sheath criterion on the characteristics of the sheath.

关键词： criterion Criterion assumed

Double Ionization of Helium by Partially Stripped Oxygen Ions

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Chinese Physics Letters 1996年第6期13卷 428-431页

作者： CAI Xiao-hong SHEN Zi-yong CHEN Xi-meng liu Zhao-yuan liu hui-ping MA Xin-wen HOU Ming-dong Department of Modern Physics Lanzhou UniversityLanzhou 730000 Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000

New measurement of the ratio of the double ionization cross section to that of the single ionization of helium induced by 2.0-7.5 MeV partially stripped O^(q+) ion(q=1,2,3,4)is *** the measured data with the Olson-Schlachter scaling,the double ionization cross section of helium by partially stripped oxygen ion is *** is found that the v/qeff dependence of the obtained double ionization cross section agrees well with the(v/qeff)^(-4) law.

关键词： ionization Oxygen double

Efficacy of Aidi Injection(艾迪注射液)on Overexpression of P-Glycoprotein Induced by Vinorelbine and Cisplatin Regimen in Patients with Non-Small Cell Lung Cancer

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Chinese Journal of Integrative Medicine 2017年第7期23卷 504-509页

作者： MA Jun-jie liu hui-ping College of Basic Medicine Nanjing University of Chinese Medicine Department of Oncology Jiangsu Shuyang Hospital of Traditional Chinese Medicine Department of Thoracic Surgery Nanjing BenQ Hospital Affiliated to Nanjing Medical University

Objective：To investigate the efficacy of Aidi Injection（艾迪注射液） on overexpression of P-glycoprotein（P-gp） induced by vinorelbine and cisplatin（NP） regimen in patients with non-small cell lung cancer（NSCLC）, and study the difference between intravenous administration and targeting intratumor administration of Aidi Injection with thoracoscope. Methods：Totally 150 patients with NSCLC were randomly assigned to the control group, the intravenous group and the intratumor group by the random envelope method, 50 cases in each group. The patients were treated with NP regimen（2 cycles）, NP regimen（2 cycles） plus Aidi intravenous injection, or NP regimen（2 cycles） plus Aidi intratumor injection with thoracoscope, respectively for 6 weeks. The clinical efficacy was observed based on Response Evaluation Criteria in Solid Tumors（RECIST） rules, the expression of P-gp in the tumor tissue was tested before, 3 and 6 weeks after treatment, the safety was evaluated by monitoring the toxicity in the process of treatment, and the progressionfree survival（PFS） was measured. Results：Fifteen cases dropped out because of the irreconcilable conditions which had no relationship with the treatment, 4 in the control group, 5 in the intravenous group, and 6 in the intratumor group, respectively. Compared with the control group, the response rates（complete remission ＋ partial response） and the disease control rates（complete remission ＋ partial response ＋ stable disease） were significantly higher, the P-gp expressions were significantly decreased after 3 and 6 weeks of treatment, and the Kaplan-Meier survival curves of PFS were significantly longer in the intravenous and intratumor groups（P〈0.05 or P〈0.01）, and the intratumor group showed better effects than the intravenous group（P〈0.05 or P〈0.01）. Compared with the control group, the occurrences of rash, nausea and leukocytopenia were significantly decreased in the intravenous and intratumor groups（P〈0.05）, but without significant difference betwee

关键词： Aidi Injection thoracoscopy non-small cell lung cancer P-glycoprotein vinorelbine and cisplatin regimen targeting intratumor injection with thoracoscope

Influence of Laser Wavelength on Laser-induced Breakdown Spectroscopy Applied to Semi-Quantitative Analysis of Trace-Elements in a Plant Sample

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Chinese Physics Letters 2010年第6期27卷 85-88页

作者： ZHANG Da-Cheng MA Xin-Wen WEN Wei-Qiang ZHANG Peng-Ju ZHU Xiao-Long LI Bin liu hui-ping Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 Graduate University of Chinese Academy of Sciences Beijing 100049

Laser-induced breakdown spectroscopy （LIBS） as a powerful analytical technique is applied to analyze trace- elements in fresh plant samples. We investigate the LIBS spectra of fresh holly leaves and observe more than 430 lines emitted from 25 elements and molecules in the region 230-438nm. The influence of laser wavelength on LIBS applied to semi-quantitative analysis of trace-element contents in plant samples is studied. The results show that the UV laser has lower relative standard deviations and better repeatability for semi-quantitative analysis of trace-element contents in plant samples. This work may be helpful for improving the quantitative analysis power of LIBS applied to plant samples.

关键词： LASER spectroscopy QUANTITATIVE research TRACE elements WAVELENGTHS STANDARD deviations NUCLEAR physics

Study and application on fire extinguishing and preventing with light-paste material for coalmine

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Journal of Coal Science & Engineering(China) 2011年第3期17卷 340-344页

作者： XIAO Yang DENG Jun LI Shu-gang liu Xin WU hui-ping Key Laboratory of Western Mine Exploitation and Hazard Prevention Ministry of Education College of Energy Science ＆ Engineering Xi＇an University of Science and Technology Xi＇an 710054 China

For preventing and extinguishing the spontaneous combustion of coal seam, based on the importance for sealing air leakage channels in roadway, developed a material of light-paste for coalmine, and research its ingredient, proportion and performance. The result indicates that the component ratio of the material is which PB exciting agent is 20%, complex reinforcing agent is 2%, complex expansion agent is 1%, and A-material is 77%. The performances of compressive strength, swelling ratio and expansion time are optimum. The light-paste material can effectively seal air leakage channels for preventing and extinguishing the spontaneous combustion of coal seam in coalmine.

关键词： light-paste exciting agent reinforcing agent swelling ratio expansion time