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X-ray diagnosis of synchronous multiple primary carcinoma in the upper gastrointestinal tract

World Journal of Gastroenterology 2011年第14期17卷 1817-1824页

作者： Zhi-Hao yang Jian-Bo Gao Song-Wei Yue hua Guo Xue-hua yang Department of Radiology The First Affiliated Hospital of Zhengzhou University Zhengzhou 450052 Henan Province China

AIM:To analyze the radiological features of multiple primary carcinoma (MPC) in the upper gastrointestinal (GI) tract,study its biological characteristics and evaluate X-ray examination in its diagnosis. METHODS:Hypotonic double-contrast GI radiography was performed in 59 multiple primary carcinoma cases,pathologically proved by surgery or endoscopy biopsy. Radiological findings were analyzed. RESULTS:Of the 59 cases,esophageal MPC (EMPC) was seen in 24,esophageal and gastric MPC (EGMPC) in 27 and gastric MPC (GMPC) in 8. Of the 49 lesions found in 24 EMPC,hyperplastic type was seen in 23,medullary type in 9. The lesions were located at the upper (n = 17),middle (n = 19) or lower (n = 13) segment of the esophagus. In 27 EGMPC,the esophageal lesions were located at the middle (n = 16) or lower (n = 11) segment of the esophagus,while the gastric le-sions were located at the gastric cardia (n = 16),fundus (n = 1),body (n = 3) and antrum (n = 7). The esophageal lesions were mainly of the hyperplastic type (n = 12) or medullary type (n = 7),while the gastric lesions were mainly of the hyperplastic type (n = 18). A total of 119 lesions in the 59 patients with synchronous multiple carcinoma were proved by surgery or endoscopy biopsy,and preoperative upper radiographic examination detected 100 of them (84.03% sensitivity). Eighteen (52.94%) of the T1 lesions were found during preoperative diagnosis by radiographic examination. Moreover,only 3 (3.53%) of the T2-4 lesions were misdiagnosed. CONCLUSION:Hypotonic double-contrast upper gastrointestinal examination,providing accurate information about lesion morphology,location and size,can serve as a sensitive technique for the preoperative diagnosis of MPC.

关键词： Multiple primary carcinoma Upper gastrointestinal tract Radiography

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COMPUTATIONAL AND EXPERI-MENTAL STUDY ON TIP LEAKAGE VORTEX OF CIRCUMFERENTIAL SKEWED BLADES

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Chinese Journal of Mechanical Engineering 2007年第2期20卷 82-87页

作者： LI yang OUyang hua DU Zhaohui School of Mechanical Engineering Shanghai Jiaotong University Shanghai 200030 China

In the steady operation condition, the experiments and the numerical simulations are used to investigate the tip leakage flow fields in three low pressure axial flow fans with three kinds of circumferential skewed rotors, including the radial rotor, the forward-skewed rotor and the back- ward-skewed rotor. The three-dimensional viscous flow fields of the fans are computed. In the experiments, the two-dimensional plane particle image velocimetry （PIV） system is used to measure the flow fields in the tip region of three different pitchwise positions of each fan. The results show that the computational results agree well with the experimental data in the flow field of the tip region of each fan. The tip leakage vortex core segments based on method of the eigenmode analysis can display clearly some characteristics of the tip leakage vortex, such as the origination position of tip leak- age vortex, the development of vortex strength, and so on. Compared with the radial rotor, the other two skewed rotors can increase the stability of the tip leakage vortex and the increment in the forward-skewed rotor is more than that in the backward-skewed one. Among the tip leakage vortices of the three rotors, the velocity of the vortex in the forward-skewed rotor is th6 highest in the circumferential direction and the lowest in the axial direction.

关键词： Low pressure axial flow fan Tip leakage vortex Particle image velocimetry (PIV) Eigenmode analysis

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An Interpolation of Hardy Inequality and Moser–Trudinger Inequality on Riemannian Manifolds with Negative Curvature

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Acta Mathematica Sinica,English Series 2016年第7期32卷 856-866页

作者： Yan Qing DONG Qiao hua yang School of Mathematics and Statistics Wuhan University

Let M be a complete, simply connected Riemannian manifold with negative curvature. We obtain an interpolation of Hardy inequality and Moser-Trudinger inequality on M. Furthermore, the constant we obtain is sharp.

关键词： Moser-Trudinger inequality Hardy inequality Riemannian manifold negative curvature

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Positive Solutions to a Neumann Problem of Semilinear Elliptic System with Critical Nonlinearity

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Acta Mathematicae Applicatae Sinica 2006年第4期22卷 687-702页

作者： Wei-hua yang Academy of Mathematics and Systems Science Chinese Academy of Science Beijing 100080 China

In this paper, we consider the Neumann boundary value problem for a system of two elliptic equations involving the critical Sobolev exponents. By means of blowing-up method, we obtain behavior of positives with low en... 详细信息

关键词： Elliptic system Neumann problem critical Sobolev exponent

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Doubly charged Higgs production at future ep colliders

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Chinese Physics C 2022年第6期46卷 102-113页

作者： Xing-hua yang Zhong-Juan yang School of Physics and Optoelectronic Engineering Shandong University of TechnologyZibo 255000China School of Physics and Technology University of JinanJinan 250022China

The Higgs sector of the standard model can be extended by introducing an SU(2)_(L) Higgs tripletΔto generate tiny neutrino masses in the framework of the type-Ⅱseesaw *** this paper,we study the pair production of the introduced Higgs triplet at future e-p *** corresponding production cross sections via the vector boson fusion process at the FCC-ep and ILC■FCC are predicted,where the production of a pair of doubly charged Higgs is found to be dominant and then used to investigate the collider phenomenology of the Higgs *** on the size of the Higgs triplet vacuum expectation value,the doubly charged Higgs may decay into a pair of same-sign charged leptons or a pair of same-sign W *** explore the discovery potential of the doubly charged Higgs at future e-p colliders,we discuss these two decay scenarios in detail and show their detection sensitivity based on the mass of the doubly charged Higgs.

关键词： type-Ⅱseesaw doubly charged Higgs e-p collision

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Cloning and Sequence Analysis of the Full-length cDNA of a Novel yp05 Gene Associated With Citrinin Production in Monascus aurantiacus

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Biomedical and Environmental Sciences 2007年第2期20卷 135-140页

作者： YONG-hua XIONG yang XU WEI-hua LAI YAN-PIN LI hua WEI Sino-Germany Joint Research Institute National Key Laboratory of Food Science （Nanchang University） Ministry of Education Nanchang 330047 Jiangxi China

Objective To obtain the full-length cDNA of a novel gene （named yp05） associated with citrinin production-related genes in Monascus aurantiacus. Methods Total RNA was extracted from mycelium, 3＇ and 5＇ cDNA end of yp05 gene was amplified using smartTM trace cDNA amplification kit, and the full-length cDNA of a novel gene （named yp05） was obtained from the electronic assembly of 3＇-RACE and 5＇- RACE products. Results This yp05 gene was 787 bp including a 597 bp open reading frame （ORF） and encoded a deduced protein with 199 amino acid residues, and the amino acid sequence of this protein was found similar with the sequences of many fungal manganese-superoxide dismutases in the GenBank with the aid of BLASTp. The transcription ofyp05 gene in Monascus strains was analyzed with the aid of Northern blotting. The transcription of yp05 gene was only detected in Monascus strains, provided that citrinin was produced. Conclusion The transcription of yp05 gene belongs to differential expression genes of citfinin yielded from Monascus and has no correlation with the biosynthesis pathway of red pigments.

关键词： Monascus aurantiacus Citrinin RACE Manganese-superoxide dismutases

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Deformation and failure processes of kaolinite under tension:Insights from molecular dynamics simulations

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Science China(Physics,Mechanics & Astronomy) 2019年第6期62卷 55-63页

作者： hua yang ManChao He ChunSheng Lu WeiLi Gong State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and Technology Department of Mechanical Engineering Curtin University

As a primary constituent of soft rocks, kaolinite plays an important role in large deformations of underground structures, which usually leads to serious safety risks. This paper investigates the deformation and failure processes of kaolinite under tension using molecular dynamics simulations. Based on the atomistic scale of these deformation and failure processes and their stressstrain curves, Young's moduli and strengths in three crystal directions and the surface energy of the(001) plane were obtained,which were consistent with theoretical predictions. The number of broken bonds and their corresponding broken sequences were determined. The results of our study indicated that as more bonds break during tension, the initiation of crack led to a sharp decrease in stress. We also explored the influence of temperature on the mechanical properties of kaolinite, which indicated that as temperature increased, the tensile strength and Young's modulus decreased.

关键词： kaolinite micromechanics deformation fracture molecular dynamics

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Generation of mid-infrared supercontinuum by designing circular photonic crystal fiber

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Chinese Physics B 2022年第5期31卷 370-378页

作者： Ying huang hua yang Yucheng Mao College of Computer Science and Electronic Engineering Hunan UniversityChangsha 410082China State Key Laboratory of Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China

A circular photonic crystal fiber(C-PCF)based on As2 Se3 is designed,which has three zero dispersion wavelengths and flat *** this fiber,a wide mid-infrared supercontinuum(MIR-SC)can be generated by launching a femtosecond pulse in the first anomalous dispersion *** simulation results show that the MIR-SC is formed by soliton self-frequency shift and direct soliton spectrum tunneling on the long wavelength side and self-phase modulation,soliton fission on the short wavelength ***,optical shocking and four-wave mixing(FWM)are not conducive to the long-wavelength extension of MIR-SC,while the number and intensity of fundamental solitons have a greater effect on the short-wavelength extension of *** generation of optical shocking waves,FWM waves and fundamental solitons can be obviously affected by changing the fiber length and input pulse parameters,so that the spectrum range and flatness can be adjusted with great ***,under the conditions of 4000 W pulse peak power,30 fs pulse width,47 mm fiber length,and 0 initial chirp,a wide MIR-SC with a coverage range of 2.535μm-16.6μm is *** numerical results are encouraging because they demonstrate that the spread of MIR-SC towards the red and blue ends can be manipulated by choosing the appropriate incident pulse and designing optimized fiber parameters,which contributes to applications in such diverse areas as spectroscopy,metrology and tomography.

关键词： circular photonic crystal fiber chalcogenide glass direct soliton spectrum tunneling nonlinearity

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Intelligent Fault Diagnosis in Lead-zinc Smelting Process

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International Journal of Automation and computing 2007年第2期4卷 135-140页

作者： Wei-hua Gui Chun-hua yang Jing Teng School of Information Science ＆ Engineering Central South University Changsha 410083 PRC

According to the fault characteristic of the imperial smelting process （ISP）, a novel intelligent integrated fault diagnostic system is developed. In the system fuzzy neural networks are utilized to extract fault symptom and expert system is employed for effective fault diagnosis of the process. Furthermore, fuzzy abductive inference is introduced to diagnose multiple faults. Feasibility of the proposed system is demonstrated through a pilot plant case study.

关键词： Fault diagnosis fuzzy logic expert system neural network inference.

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Microemulsion Polymerization of Methyl Methacrylate

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Chemical Research in Chinese Universities 2001年第3期17卷 325-330页

作者： DAN Yi yang Yun-hua CHEN San-yu State Key Laboratory of Polymer Materials Engineering Department of Polymer Materials Science and EngineeringSichuan UniversityChengdu 610065P.R.China

The microemulsion polymerization of methyl methacrylate was studied. The effects of feeding modes on the structure and the properties of the obtained polymer microlatex were investigated by measuring the conversion, the transmittance and the refractive index of the latex, and by measuring the particle size, the molecular weight and the glass transition temperature (T_g) of the polymers. The results show that compared to the batch feeding mode, the semi-continuous feeding mode is more favorable to form a PMMA microlatex with a higher transmittance, a smaller particle size, a higher molecular weight and a higher T_g. And the obtained PMMA microlatex has a 30%—40% (mass fraction) polymer content, a 0. 03 emulsifier/water weight ratio, a 0. 05 emulsifier/monomer weight ratio and a 17 nm average particle diameter, which is very important for the industrialization of the microemulsion polymerization technique.

关键词： Microemulsion polymerization Methyl methacrylate Fedding mode Particle size

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