bluuebunny/crossref_metadata_2025_split huggingface dataset:
Reliable guaranteed cost control for linear state delayed systems with adaptive memory state feedback controllers
Authors: Ye Dan , Yang Guang‐Hong 
Published: January 2009

AbstractThis paper deals with the problem of reliable guaranteed cost control for linear time‐delay systems via state feedback against actuator faults. Based on indirect adaptive method, the proposed delay‐dependent memory controller with variable gains is established, whose gains are affinely dependent on the online estimations of fault parameters. In the frameworks of linear matrix inequalities, sufficient conditions with less conservativeness than those of the traditional controller with fixed gains are derived such that the closed‐loop system is asymptotically stable and the cost function value is minimized in both normal and faulty cases. Numerical examples are given to illustrate the effectiveness of the proposed method. Copyright © 2008 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society
State feedback H∞ control for quantized discrete‐time systems
Authors: Che Wei‐Wei , Yang Guang‐Hong 
Published: January 2009

AbstractThis paper is concerned with the quantized state feedback H∞ control problem for discrete‐time linear time‐invariant systems. The quantizer considered here is dynamic and composed of an adjustable “zoom” parameter and a static quantizer. Static quantizer ranges are with practical significance and fully considered here. A quantized H∞ controller design strategy is proposed with taking quantizer errors into account, where an iterative linear matrix inequality (LMI) based optimization algorithm is developed to minimize static quantizer ranges with meeting H∞ performance requirement for quantized closed‐loop systems. An example is presented to illustrate the effectiveness of the proposed method. Copyright © 2008 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society
Conformal mapping and bipolar coordinate for eccentric Laplace problems
Authors: Chen Jeng‐Tzong , Tsai Ming‐Hong , Liu Chein‐Shan 
Published: January 2009

AbstractBoundary value problems on the eccentric annulus are quite complex and cannot directly be solved analytically using cartesian or polar coordinates. Many mathematical techniques have been used to solve such a problem by using conformal mapping and bipolar coordinate. In the literature, Carrier and Pearson [Partial differential equation‐theory and technique. New York, Academic Press, 1976, pp 68–71], Muskhelishvili [Some basic problems of the mathematical theory of elasticity. Noordhoff, Groningen; 1953, pp 175–179], Ling [Torsion of an eccentric circular tube, Technical Report, No. 1, Chinese Bureau of Aeronautical Research, 1940], Timoshenko and Goordier [Theory of Elasticity. New York, McGraw‐Hill; 1972, pp 196–202], Shen [Null‐field approach for Laplace problems with circular boundaries using degenerate kernels, Master thesis, National Taiwan Ocean University, Keelung, Taiwan, 2005], Lebedev et al. [Worked Problems in Applied Mathematics. New York, Dover; 1965] have solved this kind of problems using similar techniques. By using transformation in a transformed plane in the complex variable theory, we can obtain the analytical solution easily. We focus on the connection between conformal mapping and curvilinear coordinates, and figure out the relation to take integration by way of mapping in the complex plane. All the transformations and curvilinear coordinates can be unified using the viewpoint of conformal mapping. Their relationship among available methods can be constructed by translation, stretching, rotation and inversion. Finally, an example of eccentric domain is solved by using various mappings and curvilinear coordinates and their relations are linked. Not only geometry transformation is addressed but also the solution of the Laplace equation is obtained. © 2009 Wiley Periodicals, Inc. Comput Appl Eng Educ 17: 314–322, 2009; Published online in Wiley InterScience (www.interscience.wiley.com); DOI 10.1002/cae.20208
Optimal inspection model as an example for graduate level distance studies
Authors: Mockus Jonas 
Published: January 2009

AbstractThis article deals with the development of a Web‐based integrated system for distance graduate studies of game theory which aims to support core curriculum and to provide students with hands‐on experience on effective use and development of software tools. The objective is to stimulate and develop creative abilities to work as independent researchers by investigation of on‐line optimization models on the Web. The Inspection Games model is an example. New polynomial time algorithms are described. The Web sitehttp://pilis.if.ktu.lt/∼jmockusincludes this and accompanying models. © 2009 Wiley Periodicals, Inc. Comput Appl Eng Educ 17: 340–350, 2009; Published online in Wiley InterScience (www.interscience.wiley.com); DOI 10.1002/cae.20220
Reactor Technologies for Propane Partial Oxidation to Acrylic Acid
Authors: Godefroy A. , Patience G. S. , Tzakova T. , Garrait D. , Dubois J.‐L. 
Published: January 2009

AbstractThe two step process to produce acrylic acid from propylene is the predominant technology practiced commercially. The economics of this process are compared with the direct oxidation of propane to acrylic acid in a fixed bed, turbulent fluidized bed (TFB) and circulating fluidized bed (CFB). Economies of scale are difficult to realize in fixed beds due to the limited heat transfer surface, and therefore, several reactors are required in parallel. A single reactor train is possible due to the excellent heat transfer characteristics of the TFB and CFB. The economics of the TFB are superior to either the CFB or multi‐tubular fixed beds. However, both investment and operating costs are sensitive to selectivity. A CFB could become the reactor of choice if lattice oxygen can be shown to improve selectivity and conversion. In order for propane to replace propylene as the preferred feedstock, selectivity must be at least 65 %, which has yet to be demonstrated in practice.
Nickel‐ and Copper‐Based Oxygen Carriers for Chemical Looping Combustion
Authors: Hoteit A. , Chandel M. K. , Delebarre A. 
Published: January 2009

AbstractChemical looping combustion (CLC) is a combustion process in which the different fuels can be burnt with inherent separation of CO2. A CLC system has two interconnected reactors named as fuel and air reactor. In the fuel reactor, metal oxides supply oxygen for the combustion of the gaseous fuel, and the metal oxides are regenerated (oxidized) with air in the air reactor. The feasibility of a CLC system greatly depends on the selection of appropriate metal oxides as oxygen carriers. In the present study, NiO/NiAl2O4 and Cu0.95Fe1.05AlO4 were tested experimentally in a fluidized‐bed reactor as a function of number of oxidation‐reduction cycles, temperature and effect of steam mixed with methane as a fuel. A 30‐MWfuel CLC system was simulated for the combustion of biogas, syngas and methane on the basis of the experimental results.
Discrete Element Method Simulation of Cylinder‐Shaped Particle Flow in a Gas‐Solid Fluidized Bed
Authors: Zhong W.‐Q. , Zhang Y. , Jin B.‐S. , Zhang M.‐Y. 
Published: January 2009

AbstractDiscrete element method (DEM) simulation of the flow of cylinder‐shaped particles in a gas‐solid fluidized bed has been carried out three‐dimensionally. The gas and particle motions were modeled with the k‐ϵ turbulent model and DEM simulation, respectively. The cylinder‐shaped particles were elongated by several spheres, which were described by a cylinder with hemi‐spherical ends of the same radius. Drag‐, contact‐ and gravitational forces acting on each individual particle were considered when establishing the mathematical models. Simulated flow patterns and pressure drops at different superficial gas velocities were in good agreement with the experimental results from a visual fluidized bed. In addition, some hydrodynamics of gas/cylinder‐shaped particle flow, i.e., bed expansion ratio, particle volume fraction, particle velocity and mean percentage of particle collisions, were obtained at various superficial gas velocities.
Cold Flow Model Study on a Dual Circulating Fluidized Bed (DCFB) System for Chemical Looping Processes
Authors: Pröll T. , Rupanovits K. , Kolbitsch P. , Bolhàr‐Nordenkampf J. , Hofbauer H. 
Published: January 2009

AbstractA cold flow model was built and operated in order to study the fluid dynamics of a 120‐kW chemical looping pilot rig for gaseous fuels. The system consists of two interconnected circulating fluidized bed reactors with globally circulating bed material (dual circulating fluidized bed – DCFB). Gas mixing between the two reactors is prevented by moderately fluidized loop seals. In the cold model, both reactors are fluidized with air at two stages to control the solids circulation. The data presented focus on the solids circulation rates and on pressure profiles of both reactors, depending on selected operating parameters like fluidization gas flow rate, level of gas introduction, loop seal fluidization, and solids inventory. The results show high solids circulations in the global loop between the two reactors for the scaled base case operation conditions already at low bed inventories.
Design of Explosion‐Hazardous Areas for Gas Pressure‐Regulating (GPR) Stations
Authors: Schmücker A. , Ernst R. , Groh B. 
Published: January 2009

AbstractGas pressure‐regulating (GPR) stations are part of the nation‐wide pipeline network which supplies customers with natural gas. GPR stations are equipped with gas vents to release small amounts of gas in rare instances for operational reasons. The operators of gas transport facilities are required to determine the size of the explosion‐hazardous areas (EHAs) that may occasionally develop at the gas vents and to keep them free from ignition sources. In order to facilitate the calculation of the EHAs, the German DVGW issued a guide to the efficient calculation of explosion‐hazardous areas. The calculation method takes account of the particular properties of the venting systems in order to determine the rate at which gas is released. Based on this figure and on additional parameters, gas dispersion and size of the EHAs are assessed. The method of calculation and e.BEx®, its software version, were developed by E.ON Ruhrgas AG.
Sizing of Safety Valves Using ANSYS CFX‐Flo®
Authors: Moncalvo D. , Friedel L. , Jörgensen B. , Höhne T. 
Published: January 2009

AbstractThis work discusses the effect of the degree of fineness of the flow volume discretization and that of the turbulence model on the accuracy of reproduction of air mass flow rates in two safety valves using the CFD software ANSYS Flo®. Calculations show that the degree of fineness of the discretization is the decisive factor affecting the exactness of the calculations and that the best reproduction is achieved with grids where at least two cells are built on the smallest edge. The selection of the turbulence model has by far in comparison a lower impact; however, the best accuracy is obtained using the standard k‐ω model and the SST modification of Menter.
Evaluation of Numerical Flow and Dispersion Models for Applications in Industrial and Urban Areas
Authors: Schatzmann M. , Leitl B. 
Published: January 2009

AbstractNumerical models are widely used to predict wind flow and pollutant dispersion in industrial and urban landscapes. Many of them are already commercially available and are being applied by consulting engineers to complex real world problems. There is, however, some doubt about the evaluation of these models and the quality of predictions. This paper attempts to give a critical assessment of the current state of model evaluation, thereby focusing on the most important step of the evaluation procedure: the comparison of model predictions with data. It goes without saying that the result of this process will only be as good as the reference data used. By using obstacle resolving CFD models it is shown that it is not an easy task to provide data that can be regarded as a reliable standard.
ChemInform Abstract: Cyclic Boron Clusters Enclosing Planar Hypercoordinate Cobalt, Iron, and Nickel
Authors: Ito Keigo , Pu Zhifeng , Li Qian‐Shu , von Rague Schleyer Paul 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: “Bottom‐Up” Meets “Top‐Down” Assembly in Nanoscale Polyoxometalate Clusters: Self‐Assembly of [P4W52O178]24‐ and Disassembly to [P3W39O134]19‐.
Authors: Pradeep Chullikkattil P. , Long De‐Liang , Streb Carsten , Cronin Leroy 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Facile and Convenient Synthesis of Pyrazole, Pyridine, Pyridazine, Pyrazolo[3,4‐b]pyridine, and Pyrazolo[5,1‐c][1,2,4]triazine Derivatives.
Authors: Kheder Nabila A. , Mabkhot Yahia N. , Farag Ahmad M. 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Selective Hydrogenation of Aromatic Aminoketones by Pd/C Catalysis.
Authors: Du Rui , Zhu Changjin , Zhang Peilong , Fan Ruizhen 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Selective Hydrogenation of Unsaturated Aldehydes in a Poly(ethylene glycol)/Compressed Carbon Dioxide Biphasic System.
Authors: Liu Ruixia , Cheng Haiyang , Wang Qiang , Wu Chaoyong , Ming Jun , Xi Chunyu , Yu Yancun , Cai Shuxia , Zhao Fengyu , Arai Masahiko 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Intramolecular Arylcyanation of Alkenes Catalyzed by Nickel/AlMe2Cl.
Authors: Nakao Yoshiaki , Ebata Shiro , Yada Akira , Hiyama Tamejiro , Ikawa Masashi , Ogoshi Sensuke 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Secondary Enamides by Ruthenium‐Catalyzed Selective Addition of Amides to Terminal Alkynes.
Authors: Goossen Lukas J. , Salih Kifah S. M. , Blanchot Mathieu 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Facile Preparation of trans‐1,2‐Cyclopropanes Containing p‐Trifluoromethylphenyl Group and Its Application to the Construction of Pyrazole and Cyclopropane Ring Fused Pyridazinone Derivatives.
Authors: Cao Weiguo , Zhang Hui , Chen Jie , Deng Hongmei , Shao Min , Lei Lu , Qian Jiaxian , Zhu Yuan 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Broensted Acid Catalyzed, Enantioselective, Vinylogous Mannich Reaction of Vinylketene Silyl N,O‐Acetals.
Authors: Giera David S. , Sickert Marcel , Schneider Christoph 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: CuI/L‐Proline‐Catalyzed Synthesis of Vinyl Sulfides in 95% Alcohol.
Authors: Guo Sheng‐Rong , Yuan Yan‐Qin 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Transistors from a Conjugated Macrocycle Molecule: Field and Photo Effects
Authors: Zhao Wei , Tang Qin , Chan Hoi Shan , Xu Jianbin , Lo Ka Yuen , Miao Qian 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Controllable Cyclization Reactions of 2‐(2′,3′‐Allenyl)acetylacetates Catalyzed by Gold and Palladium Affording Substituted Cyclopentene and 4,5‐Dihydrofuran Derivatives with Distinct Selectivity.
Authors: Jiang Xuefeng , Ma Xiaojing , Zheng Zilong , Ma Shengming 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of 1(3H)‐Iminobenzo[c]thiophene Derivatives by Hydriodic Acid‐Mediated Cyclization of 2‐(Vinyl)thiobenzamide Derivatives.
Authors: Kobayashi Kazuhiro , Fujita Seiki , Konishi Hisatoshi 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Uncommon Reaction of Pyrrolo[2,1‐c][1,4]benzoxazine‐1,2,4‐trione with α‐Enaminoester.
Authors: Racheva N. L. , Aliev Z. G. , Maslivets A. N. 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Minimizing Side Reactions in Classical Pyrazole Synthesis from β‐Oxonitriles: The Use of Acetylhydrazine.
Authors: Krasavin Mikhail , Konstantinov Igor O. 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of 4,5‐Dichloro‐3‐cyanoisothiazole and Its Functional Derivatives.
Authors: Potkin V. I. , Zubenko Yu. S. , Nechai N. I. , Bykhovets A. I. , Kurman P. V. 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Chemoselective Removal of Acyloxy in 1‐(Benzotriazole‐1‐yl)alkyl Esters and Its Application in the Preparation of β‐(Benzotriazole‐1‐yl)alcohols.
Authors: Wang Xiaoxia , Mao Hui , Xie Guanqun , Du Jingxing 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Spiroacetal‐Triazoles as Privileged Natural Product‐Like Scaffolds Using “Click Chemistry”.
Authors: Choi Ka Wai , Brimble Margaret A. 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Reaction of Reformatsky Reagent Prepared from Methyl 1‐Bromocyclohexanecarboxylate and Zinc with Substituted Chalcones
Authors: Kirillov N. F. , Gavrilov A. G. 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of 6‐Aryltetrahydropyran‐2,4‐diones Containing a Hexamethylene Substituent in Positions 3 or 5 of Heterocycle.
Authors: Kirillov N. F. , Melekhin V. S. , Bogatyrev D. V. 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Theory‐Guided Design of Broensted Acid‐Assisted Phosphine Catalysis: Synthesis of Dihydropyrones from Aldehydes and Allenoates.
Authors: Creech Gardner S. , Zhu Xue‐Feng , Fonovic Branden , Dudding Travis , Kwon Ohyun 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Rhodium‐Catalyzed Highly Enantioselective [4 + 2] Annulation of 2‐Alkynylbenzaldehydes with Acyl Phosphonates.
Authors: Tanaka Ken , Tanaka Rie , Nishida Goushi , Noguchi Keiichi , Hirano Masao 
Published: January 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.