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Solvability of a class of PT-symmetric non-Hermitian Hamiltonians：Bethe ansatz method

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Chinese Physics B 2017年第6期26卷 14-21页

作者： m Baradaran H Panahi Department of Physics University of Guilan Rasht 41635-1914Iran

We use the Bethe ansatz method to investigate the Schrdinger equation for a class of PT-symmetric non-Hermitian Hamiltonians. Elementary exact solutions for the eigenvalues and the corresponding wave functions are obtained in terms of the roots of a set of algebraic equations. Also, it is shown that the problems possess sl（2） hidden symmetry and then the exact solutions of the problems are obtained by employing the representation theory of sl（2） Lie algebra. It is found that the results of the two methods are the same.

关键词： PT-symmetry Bethe ansatz method Lie algebraic approach quasi-exactly solvable

Surface plasmon oscillations in a semi-bounded semiconductor plasma

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Plasma Science and Technology 2018年第2期20卷 76-81页

作者： m SHAHmANSOUrI A P mISrA Department of Physics Faculty of ScienceArak University Department of mathematics Siksha BhavanaVisva-Bharati University

We study the dispersion properties of surface plasmon（SP） oscillations in a semi-bounded semiconductor plasma with the effects of the Coulomb exchange（CE） force associated with the spin polarization of electrons and holes as well as the effects of the Fermi degenerate pressure and the quantum Bohm *** from a quantum hydrodynamic model coupled to the Poisson equation,we derive the general dispersion relation for surface plasma *** results in this context are *** dispersion properties of the surface waves are analyzed in some particular cases of interest and the relative influence of the quantum forces on these waves are also studied for a nano-sized Ga As semiconductor *** is found that the CE effects significantly modify the behaviors of the SP *** present results are applicable to understand the propagation characteristics of surface waves in solid density plasmas.

关键词： surface plasmon oscillations semiconductor plasma semi-bounded plasma

Intraductal biliary and pancreatic endoscopy: An expanding scope of possibility

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World Journal of Gastroenterology 2008年第20期14卷 3129-3136页

作者： Joel r Judah Peter V Draganov Division of Gastroenterology Hepatology and Nutrition University of Florida Gainesville

Intraductal endoscopy describes the use of an endoscope to directly visualize the biliary and pancreatic ducts. For many years, technological challenges have made performing these procedures difficult. The "mother-baby" system and other various miniscopes have been developed, but routine use has been hampered due to complex setup, scope fragility and the time consuming, technically demanding nature of the procedure. recently, the SpyGlass peroral cholangiopancreatoscopy system has shown early success at providing diagnostic information and therapeutic options. The clinical utility of intraductal endoscopy is broad. It allows better differentiation between benign and malignant processes by allowing direct visualization and targeted sampling of tissue. Therapeutic interventions, such as electrohydraulic lithotripsy (EHL), laser lithotripsy, photodynamic therapy, and argon plasma coagulation (APC), may also be performed as part of intraductal endoscopy. Intraductal endoscopy significantly increases the diagnostic and therapeutic yield of standard endoscopic retrograde cholangiography (ErCP), and as technology progresses, it is likely that its utilization will only increase. In this review of intraductal endoscopy, we describe in detail the various endoscopic platforms and their diagnostic and clinical applications.

关键词： Intraductal endoscopy Choledochoscopy Cholangioscopy Pancreatoscopy Biliary endoscopy Duodenoscope-assisted cholangiopancreatoscopy miniscope Percutaneous choledochoscopy Laparoscopiccholedochoscopy Lithotripsy

The Need for Fuzzy AI

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IEEE/CAA Journal of Automatica Sinica 2019年第3期6卷 610-622页

作者： Jonathan m.Garibaldi IEEE the School of Computer Science University of Nottingham

Artificial intelligence(AI) is once again a topic of huge interest for computer scientists around the world. Whilst advances in the capability of machines are being made all around the world at an incredible rate, there is also increasing focus on the need for computerised systems to be able to explain their decisions, at least to some degree. It is also clear that data and knowledge in the real world are characterised by *** systems can provide decision support, which both handle uncertainty and have explicit representations of uncertain knowledge and inference processes. However, it is not yet clear how any decision support systems, including those featuring fuzzy methods, should be evaluated as to whether their use is *** paper presents a conceptual framework of indistinguishability as the key component of the evaluation of computerised decision support systems. Case studies are presented in which it has been clearly demonstrated that human expert performance is less than perfect, together with techniques that may enable fuzzy systems to emulate human-level performance including *** conclusion, this paper argues for the need for "fuzzy AI" in two senses:(i) the need for fuzzy methodologies(in the technical sense of Zadeh's fuzzy sets and systems) as knowledge-based systems to represent and reason with uncertainty; and(ii) the need for fuzziness(in the non-technical sense) with an acceptance of imperfect performance in evaluating AI systems.

关键词： Artificial intelligence approximate reasoning fuzzy inference systems fuzzy sets human reasoning

Detention basins as best management practices for water quality control in an arid region

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Water Science and Engineering 2014年第2期7卷 155-167页

作者： Amina r. LODHI Kumud ACHArYA Division of Hydrologic Sciences Desert Research Institute

Flood control detention basins （DBs） can act as water quality control structures or best management practices （BmPs）. A key pollutant that DBs serve to settle out is particulate phosphorus, which adsorbs onto sediment. This study examines the sediment phosphorus concentration and its relationship with the particle size of sediment microcosms from pre- and post-rain event samples obtained from six DBs located in Clark County, Nevada. DBs were allotted a land use classification to determine if there was a correlation between the sediment phosphorus concentration and surrounding land use. The curve number method was used to calculate the runoff and subsequent phosphorus carried into the DB by the runoff. Our data show sediment phosphorus concentrations to he highest in soils from undeveloped areas. runoff amount also plays a substantial role in determining the amount of phosphorus brought into the DB by sediment. This research has implications for improvement of water quality in arid regions.

关键词： detention basin soil contamination runoff calculation water quality control,"phosphorus Las Vegas Valley Watershed

Current technical aspects of oncological hepatic surgery

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Hepatobiliary & Pancreatic Diseases International 2017年第2期16卷 147-154页

作者： Ahmed I Salem Emily r Winslow Department of Surgery University of Wisconsin School of Medicine and Public Health 600 Highland Avenue BX7375 CLINICAL SCIENCE CNTR Madison WI 53792-7375 USA

BACKGrOUND： With the recent advances in oncological hepatic surgery, major liver resections became more widely utilized procedures. The era of modern hepatic surgery witnessed improvements in patients care in preoperative, intraoperative and postoperative aspects. This significantly improved surgical outcomes regarding morbidity and mortality. This review article focuses on the recent advances in oncological hepatic *** SOUrCES： This review includes only data from peer-reviewed articles and journals. Pub med database was utilized as the primary source of the supporting literature to this review article on the latest advances in oncological hepatic *** and high sensitivity search strategies were performed to search related studies exhaustively up till June 2016. We critically and independently assessed over 50 recent publications written on this topic according to the selection criteria and quality assessment standard. We paid particular attention to the studies published in high impact journals that address the use of the surgical techniques mentioned in the articles in well-known ***： Among all utilized approaches aiming at the preoperative assessment of the liver function, Child-TurcottePugh classification remains the most reliable tool correlating with survival outcome. Although the primary radiological tools including ultrasonography, computed tomography and magnetic resonance imaging remain on top of the menu of tests utilized in assessment of focal hepatic lesions, intraoperative ultrasonography projects to be a powerful additional tool in terms of sensitivity and specificity compared to the other conventional techniques in assessment of the liver inthe operative setting, a procedure that can change the surgical strategy in 27.2% of the cases and consequently improve the oncological surgical outcome. In addition to the conventional surgical techniques of liver resection and portal vein embolization, associating liver

关键词： liver surgery liver neoplasms technical aspects oncosurgery liver metastasis

An Analysis on the Forming Characteristics of commercial pure Aluminum AA 1100 in radial-Forward Extrusion Process

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An Analysis on the Forming Characteristics of commercial pur...

TOXICOLOGICAL STUDIES ON SOmE INSECTICIDES WITH NOVEL mODES OF ACTION AGAINST TrIBOLIUm CASTANEUm （HErBST.）

第五届国际材料与热加工物理模拟及数值模拟学术会议

作者： A. Sajadi r.Ebrahimi m.m.moshksar Department of material Science and Engineering School of Engineering University of Shiraz Shiraz Iran Department of material Science and Engineering School of Engineering University of Shiraz Shiraz Iran Department of material Science and Engineering School of Engineering University of Shiraz Shiraz Iran

In this paper, the forming process of a central hub by radial-forward extrusion has been analyzed by using the finite element software, ABAQUS. In this process, the material flows in radial direction and then deflects 90 degrees into the same direction as that of punch movement. radial extrusion is used to produce parts that generally feature a central hub with radial protrusions. Design factors such as mandrel diameter, die corner radius, die fillet radius, mandrel corner radius, tube wall thickness and frictional conditions are applied to the present study by simulation. Commercially pure Aluminum AA 1100 is selected as a model material for analysis in the present study. The influence of these design factors on the force requirement during the forming operation is investigated and the simulation results are quantitatively summarized in terms of force-stroke relationships, and maximum force requirement for forming, respectively. The main goal of this study is to investigate the effect of those process parameters on the deformation pattern in radial-forward extrusion prccess, especially the effect of tube wall thickness.

关键词： Commercially pure Aluminum AA 1100 radial-forward extrusion tube wall thickness Central hub radial protrusions

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TOXICOLOGICAL STUDIES ON SOME INSECTICIDES WITH NOVEL MODES ...

Immunopathogenesis of inflammatory bowel disease

The ⅩⅤth International Plant Protection Congress

作者： r.HUSSAIN m.ASHFAQ m.A.SALEEm Pest Warning and Quality Control of Pesticides Shadab Colony Street 4 Pakpattan Pakistan Department of Agricultural Entomology University of Agriculture Faisalabad Pakistan University College of Agriculture Bahauddin Zakariyya University Multan Pakistan

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World Journal of Gastroenterology 2008年第3期14卷 390-400页

作者： David Q Shih Stephan r Targan Cedars-Sinai Inflammatory Bowel Disease Center Los Angeles CA United States Department of Medicine Division of Digestive Diseases University of California Los Angeles CA United States Cedars-Sinai Inflammatory Bowel Disease Center Los Angeles CA United States

Crohn＇s disease and ulcerative colitis are chronic relapsing immune mediated disorders that results from an aberrant response to gut luminal antigen in genetically susceptible host. The adaptive immune response that is then triggered was widely considered to be a T-helper-1 mediated condition in Crohn＇s disease and T-helpero2 mediated condition in ulcerative colitis. recent studies in animal models, genome wide association, and basic science has provided important insights in in the immunopathogenesis of inflammatory bowel disease, one of which was the characterization of the interleukin-23/Th-17 axis.

关键词： Crohn's disease Ulcerative colitis Innate andadaptive immune system