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The Method of Single Peak Fourier Analysis of Measuring the Size of Mosaic Block and Microstrain by X-ray Diffraction

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Journal of Materials Science & Technology 2000年第1期16卷 67-70页

作者： Ming CHANG (tianjin Institute of Technology, tianjin 300191, china) tianjin Institute of Technology Tianjin 300191 China

The values of mosaic block size and microstrain measured by the method of Voigt function are sometimes largely erroneous and difficult to be revised. In this paper, the causes of the 'hook effect' which inevitably exists in the method of Fourier analysis are explained; then the method for resolving this effect is put forward; and finally the method of hypothetical function is used to simplify the method of the Fourier analysis from multi-peak to single-peak. By introducing the parameter m, this method can not only indicate the degree of errors, but also revise them as well, it is simple, clear and able to accomplish the intricate pattern calculation quickly by the aid of computer. In the end, we argue the identity between method of the approximate function and the Fourier analysis, and give a more accurate proportional coefficient k.

关键词： Measurement theory

Sequence stratigraphic framework and distribution of depositional systems for the Paleogene in Liaodong Bay area

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Science china Earth Sciences 2008年第S2期51卷 1-10页

作者： ZHU XiaoMin1,DONG YanLei1,YANG JunSheng1,ZHANG Qin1,LI DeJiang2,XU ChangGui3 & YU Shui3 1 National Key Laboratory of Petroleum Resources and Prospecting,china University of Petroleum,Beijing 102249,china 2 Research Institute of Petroleum Exploration and Development——Langfang,Petrochina,Langfang 065007,china 3 Technology Department of cnooc tianjin Company,tianjin 300452,china china Univ Petr Natl Key Lab Petr Resources & Prospecting Beijing 102249 Peoples R China Petrochina Res Inst Petr Explorat & Dev Langfang Langfang 065007 Peoples R China cnooc tianjin Co Dept Technol Tianjin 300452 Peoples R China

With a comprehensive geological and geophysical data base,the Paleogene in the Liaodong Bay area,which consists of the Kongdian,Shahejie and Donghying Formations from the base to top,was divided into 4 second-order sequences and 8 third-order sequences based on the characteristics of the se-quence boundaries. Each third-order sequence is subdivided into the lowstand,lake transgressive and highstand systems tracts. The Lowstand systems tract (LST) is mainly composed of progradational parasequence sets,while the lake transgressive systems tract (TST) largely consists of the retrograda-tional parasequence sets and the highstand systems tract (HST) is dominated by the progradational parasequence sets. The main types of depositional systems include the shallow lake,semi-deep lake,deep lake,delta,fan delta,braided fluvial delta and nearshore subaqueous fan. The braided fluvial delta and fan delta depositional systems are mainly confined to the sequences of the lower SEs4-Ek,SEs3 and SEs1+2,while the sequences of SEd3,SEd2 and SEd1 are dominated by the delta and nearshore subaqueous fan depositional systems with the latter being developed at the downthrown side of the basin-bounding fault in each sequence. The evolution of the depositional systems is always con-trolled by the paleo-tectonic setting and the ancient landform in the space and geological time. It is concluded that the most favorable reservoirs are distributed in the Liaoxi low uplift and the central Liaozhong sag.

关键词： Liaodong Bay area Paleogene sequence stratigraphy sequence boundary depositional system

Expert consensus on radiotherapy combined with immunotherapy for esophageal cancer(2024 edition)

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Radiation Medicine and Protection 2024年第2期5卷 59-67页

作者： Professional Committee of Radiation Oncology china Anti-Cancer Association branch of Radiation Oncology Chinese Medical Association branch of Radiation Oncology TreatmentPhysician Chinese Medical Doctor Association Qingsong Pang Jun Wang Zhouguang Hui Wencheng Zhang 不详 tianjin Medical University Cancer Institute&Hospital Tianjin 300060China the Fourth Hospital of Hebei Medical University Shijiazhuang 050011China National Cancer Center National Clinical Research Center for CancerCancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China tianjin Medical University Cancer Hospital China

Radiotherapy represents an essential treatment approach for esophageal *** recent years,immunotherapy combined with chemotherapy has become the first-line standard treatment for patients with advanced esophageal *** phase III studies on immunotherapy combined with radiotherapy for locally advanced esophageal cancer are currently *** evidence-based medical data are urgently needed to support the integration of immunotherapy and chemoradiotherapy as a new treatment strategy for patients with locally advanced esophageal *** consensus,formulated based on the latest study results,in-depth research,and thorough discussions,provides a comprehensive set of *** document extensively covers treatment strategies and evaluation methods for radiotherapy combined with immunotherapy across patients with operable esophageal cancer,inoperable locally advanced esophageal cancer,and advanced esophageal ***,common complications and radiation-related issues associated with radiotherapy combined with immunotherapy are discussed,serving as clinical *** expert group comprised members from the Professional Committee of Radiation Oncology,china Anti-Cancer Association,the branch of Radiation Oncology,Chinese Medical Association,and the branch of Radiation Oncology Treatment Physician,Chinese Medical Doctor Association.

关键词： Esophageal squamous cell carcinoma Esophageal adenocarcinoma Immunotherapy Chemoradiotherapy Radiotherapy Expert consensus

GRAPHITE NUCLEI IN CAST IRON UNDER INOCULATION TREATMENT

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Acta Metallurgica Sinica(English Letters) 1993年第12期6卷 411-415页

作者： WAMG Chunqi YANG Jiguang tianjin University,tianjin,china associate professor,Faculty of Foundry,tianjin University.tianjin 300072,china tianjin Univ Tianjin China

Melted cast iron was inoculated by FeSi,then quenched to interrupt the dissolution, the non-metallic inclusions,in which the graphite phase was already occured,formed in the dissolution region,They dissolved into the melt soon,but the inclusions coated by graphite could exist for along *** function of inoculant is to create an undercooling solution for carbon,thereby the non-metallic inclusions in the solution may be activated as the nuclei for graphite.

关键词： inoculation cast iron dissolution region activated nuclei

K-quasi-additive fuzzy integrals of set-valued mappings

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Progress in Natural Science:Materials International 2006年第2期16卷 125-132页

作者： WANG Guijun and LI Xiaoping ( School of Mathematics Science, tianjin Normal University, tianjin 300074, china School of Management, tianjin Normal University, tianjin 300074, china) [a]School of Mathematics Science Tianjin Normal University Tianjin China [b]School of Management Tianjin Normal Universit Tianjin China

We first define the quasi-addition and quasi-multiplication operations by introducing the inductive operator, and then, in the K-quasi-additive fuzzy measure space, we establish the K-quasi-additive fuzzy integral of a generally measurable set-valued mapping. Applying the integral transformation theorem, some basic properties of the K-quasi-additive fuzzy integrals with respect to this kind of set-valued mapping are studied. Finally, the generalized monotone convergence theorems of this kind of fuzzy integrals are obtained.

关键词： set-valued mapping inductive operator integrable selections K-quasi-additive fuzzy integrals.

On the composition operators on the Bloch space of several complex variables

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Science china Mathematics 2005年第z1期48卷 392-399页

作者： ZHOU Zehua & CHE Renyu Department of Mathematics, tianjin University, tianjin 300072, china LiuHui Center for Applied Mathematics, Nankai University & tianjin University,tianjin 300072, china 1. Department of Mathematics Tianjin University 300072 Tianjin China 2. LiuHui Center for Applied Mathematics Nankai University & Tianjin University 300072 Tianjin China

In this paper we first look upon some known results on the composition operator as bounded or compact on the Bloch-type space in polydisk and ball, and then give a sufficient and necessary condition for the compositio... 详细信息

关键词： Bloch space, bounded symmetric domains, composition operator, bergman metric.

A GENERAL ITERATIVE METHOD OF FIXED POINTS FOR EQUILIBRIUM PROBLEMS AND OPTIMIZATION PROBLEMS

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Journal of Systems Science & Complexity 2009年第3期22卷 503-517页

作者： Fang ZHANG·Yongfu SUDepartment of Mathematics,tianjin Polytechnic University,tianjin 300160,china. Department of Mathematics Tianjin Polytechnic University Tianjin 300160 China

The purpose of this paper is to present a general iterative scheme as below：{F（un,y）＋1/rn（y-un,un-xn）≥0,y∈C,xn＋1=（I-αnA）Sun＋αnγf（xn）and to prove that, if {an} and {rn} satisfy appropriate conditions, then iteration sequences {xn} and {un} converge strongly to a common element of the set of solutions of an equilibrium problem and the set of fixed points of a nonexpansive mapping and the set of solution of a variational inequality, too. Furthermore, by using the above result, we can also obtain an iterative algorithm for solution of an optimization problem min h（x）, where h（x） is a convex and lower semicontinuous functional defined on a closed convex subset C of a Hilbert space H. The results presented in this paper extend, generalize and improve the results of Combettes and Hirstoaga, Wittmann, ***, Giuseppe Marino, Hong-Kun Xu, and some others.

关键词： Eprilibriurn problem nonexpansive mappings optimization problem strong convergence variational inequality.

Second mode unstable disturbance measurement of hypersonic boundary layer on cone by wavelet transform

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Acta Mechanica Sinica 2011年第4期27卷 488-493页

作者： Jian Han.Nan Jiang.Yan Tian Department of Mathematics,tianjin University,300072 tianjin,china Department of Mechanics,tianjin University,300072 tianjin,china tianjin Key Laboratory of Modern Engineering Mechanics,300072 tianjin,china State Key Laboratory of Nonlinear Mechanics,Institute of Mechanics,Chinese Academy of Sciences,100190 Beijing,china Department of Mathematics Tianjin University Tianjin China Department of Mechanics Tianjin University Tianjin China tianjin Key Laboratory of Modern Engineering Mechanics Tianjin China State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences Beijing China

Experimental investigation of hypersonic boundary layer instability on a cone is performed at Mach number 6 in a hypersonic wind tunnel. Time series signals of instantaneous fluctuating surface-thermal-flux are measured by Pt-thin-film thermocouple temperature sensors mounted at 28 stations on the cone surface in the streamwise direction to investigate the development of the unstable disturbance. Wavelet transform is employed as a mathematical tool to obtain the multi-scale characteristics of fluctuating surfacethermal-flux both in the temporal and spectrum space. The conditional sampling algorithm using wavelet coefficient as an index is put forward to extract the unstable disturbance waveform from the fluctuating surface-thermal-flux *** generic waveform for the second mode unstable disturbance is obtained by a phase-averaging technique. The development of the unstable disturbance in the streamwise direction is assessed both in the temporal and spectrum space. Our study shows that the local unstable disturbance detection method based on wavelet transformation offers an alternative powerful tool in studying the hypersonic unstable mode of laminar-turbulent transition. It is demonstrated that, at hypersonic speeds, the dominant flow instability is the second mode, which governs the course of laminar-turbulent transition of sharp cone boundary layer.

关键词： Hypersonic boundary layer. Sharp cone Insta-bility Wavelet transform

β→α Transformation of γ-Phase in Sintered WC-Co Cemented Carbides

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Journal of Materials Science & Technology 1996年第5期12卷 398-400页

作者： Shourong LIU (tianjin Institute of Hard Alloy tianjin 300222, china)Yi LIU (Shandong University Jinan 250100, china) SHANDONG UNIV JINAN 250100PEOPLES R CHINA

Varying the morphology and the structure of γ-phase (Co-base Co-W-C solid solution) by means of altering the cooling rate and the preparing method of liquid sintered WC-Co cemented carbides samples, the mechanism of fcc→hcp transformation of γ-phase in WC-Co alloy has been explored. The results show that, the cooling rate is an important affecting factor on fcc→hcp transformation of γ-phase and the fcc→hcp transformation is mainly a diffusive type when cooling WC-Co samples above room temperature

关键词： WC Co Phase in Sintered WC-Co Cemented Carbides Transformation of