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New adaptive quasi-sliding mode control for nonlinear discrete-time systems

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Journal of Systems Engineering and Electronics 2008年第1期19卷 154-160页

作者： Wang Weihong1,2 & Hou Zhongsheng3 1. School of Tra?c and Transportation, Beijing Jiaotong Univ., Beijing 100044, p. R. China 2. Dept. of Automation, Taiyuan Univ. of Science & Technology, Taiyuan 030024, p. R. China 3. Advanced Control Systems Lab, School of Electronics and Information Engineering, Beijing Jiaotong Univ., Beijing 100044, p. R. China School of Traffic and Transportation Beijing Jiaotong Univ. Beijing 100044 P. R. China Dept. of Automation Taiyuan Univ. of Science & Technology Taiyuan 030024 P. R. China Advanced Control Systems Lab School of Electronics and Information Engineering Beijing Jiaotong Univ. Beijing 100044 P. R. China

A new adaptive quasi-sliding mode control algorithm is developed for a class of nonlinear discrete-time systems, which is especially useful for nonlinear systems with vaguely known dynamics. This design is model-free, and is based directly on pseudo-partial-derivatives derived on-line from the input and output information of the system using an improved recursive projection type of identification algorithm. The theoretical analysis and simulation results show that the adaptive quasi-sliding mode control system is stable and convergent.

关键词： quasi-sliding mode control adaptive control model-free control pseudo-partial-derivative

Identifying the shortfalls of crude protein-reduced,wheat-based broiler diets

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Animal Nutrition 2022年第4期11卷 181-189页

作者： peter H.Selle Shemil p.Macelline Shiva Greenhalgh peter V.Chrystal Sonia Y.Liu poultry Research Foundation Within the University of Sydney Camden 2570NSWAustralia Sydney School of Veterinary Science The University of SydneyCamden 2570NSWAustralia School of Life and Environmental Sciences Faculty of ScienceThe University of SydneyCamperdown 2006NSWAustralia Complete Feed Solutions Pakurangao2140 AucklandNew Zealand

The objective of this review is to identify the shortfalls of wheat-based,crude protein(Cp)-reduced diets for broiler chickens as wheat is inferior to maize in this context but to inconsistent *** factors in wheat may be compromising gut integrity;these include soluble non-starch polysaccharides(NSp),amylase trypsin inhibitors(ATI)and *** NSp in wheat induce increased gut viscosities,which can lead to compromised gut integrity,which is not entirely ameliorated by NSp-degrading feed *** ATI probably compromise gut integrity and may also have the capacity to increase endogenous amino acid flows and decrease apparent starch and protein *** inclusions of 20 g/kg in a maize-soy diet depressed weight gain and feed intake and higher gluten inclusions have been shown to activate inflammatory cytokine-related genes in broiler *** research is required,perhaps particularly in relation to wheat *** protein content of wheat is typically higher than maize;importantly,this results in higher inclusions of non-bound amino acids in Cp-reduced broiler *** higher inclusions could trigger post-enteral amino acid imbalances,leading to the deamination of surplus amino acids and the generation of ammonia(NH3)which,if not adequately detoxified,results in compromised growth performance from ***,alternatives to nonbound amino acids to meet amino acid requirements in birds offered Cp-reduced,wheat-based diets merit *** digestion of wheat starch is more rapid than that of maize starch which may be a disadvantage as the provision of some slowly digestible starch in broiler diets may enhance ***,slowly digestible starch may result in more de novo ***,it may prove instructive to evaluate Cp-reduced diets based on maize-wheat and/or sorghum-wheat blends rather than entirely *** would reduce non-bound amino acid inclusions by lowering dietary Cp derived

关键词： Biomarkers Broiler chickens Reduced-crude protein diets Wheat

Commutant of Analytic Toeplitz Operators on the Bergman Space

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Acta Mathematica Sinica,English Series 2010年第12期26卷 2255-2258页

作者： Jia Yi JIANG Di Sheng XU Department of Mathematics, peking University, Beijing 100871, p.R. China Department of Mathematics Peking University Beijing P. R. China

In this paper, we characterize the commutant of Toeplitz operators on weighted Bergman space with symbol polynomial by using algebraic curves theory.

关键词： Toeplitz operator commutant Bergman space algebraic curves

阿尔泰-萨彦山的新构造运动和区域控震断裂的再活化

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地学前缘 2021年第5期28卷 301-319页

作者： Mikhail M.BUSLOV Lyudmila p.IMAEVA Sobolev V.S.Institute of Geology and Mineralogy Siberian Branch of the RAS630090 NovosibirskRussia Kazan Federal University 420008KazanRussia Institute of the Earth's Crust Siberian Branch of RAS664033 IrkutskRussia Academy of Sciences of the Republic of Sakha(Yakutia) 677007 YakutskRussia

阿尔泰-萨彦山系和新构造结构的形成被认为是印度欧亚板块碰撞带来的远程陆内变形的结果。在本次构造模型中,我们对地质、地震活动数据和地形资料进行了联合分析,认为中亚山带北部地形和地震活动的最大变化仅限于晚古生代区域断层的交... 详细信息

阿尔泰-萨彦山系和新构造结构的形成被认为是印度欧亚板块碰撞带来的远程陆内变形的结果。在本次构造模型中,我们对地质、地震活动数据和地形资料进行了联合分析,认为中亚山带北部地形和地震活动的最大变化仅限于晚古生代区域断层的交叉地带。断层的交叉和接合处应被视为增加基底破碎程度、影响局部应力场变化和预先定位M≥5级的地震震源的最重要的构造因素之一。由此,结合Charysh Terekta和Kurai区域断层交叉带出现的氦和钙华,本次研究获得了发震前兆的一些判断规律。

关键词：阿尔泰-萨彦山 Kurai-Chuya盆地活动构造 2003年9月27日的阿尔泰地震断层活化控震断层

Synthesis and in vitro antimicrobial screening of new pyrano[4,3-b]pyrane derivatives of 1H-pyrazole

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Chinese Chemical Letters 2012年第1期23卷 57-60页

作者： Chetan B.Sangani Divyesh C.Mungra Manish p.patel Ranjan G.patel Department of Chemistry Sardar Patel UniversityVallabh Vidyanagar 388120GujaratIndia

A new series of pyrano[4,3-b]pyrane 4a-l bearing 1H-pyrazole has been synthesized by one pot base catalyzed cyclocondensation reaction of 1H-pyrazole-4-carbaldehyde la-1,malononitrile 2 and 4-hydroxy-6-methylpyrone *** the synthesized compounds were screened against six bacterial pathogens,namely ***,***,***,***,***, *** and antifungal activity against,two fungal pathogens,*** and *** using broth microdilution MIC method. Some of the compounds are found to be equipotent or more potent than that of commercial drugs,against most of employed strains.

关键词： pyranopyrane MCR pyrazole-4-carbaldehyde Antimicrobial activity

Management of nonalcoholic fatty liver disease:An evidence-based clinical practice review

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World Journal of Gastroenterology 2014年第34期20卷 12182-12201页

作者： Juan p Arab Roberto Candia Rodrigo Zapata Cristián Mu?oz Juan p Arancibia Jaime poniachik Alejandro Soza Francisco Fuster Javier Brahm Edgar Sanhueza Jorge Contreras M Carolina Cuellar Marco Arrese Arnoldo Riquelme Departamento de Gastroenterología Escuela de MedicinaPontificia Universidad Católica de Chile8330024 SantiagoChile Sección de Gastroenterología Hospital del SalvadorEscuela de MedicinaUniversidad de Chile7500922 SantiagoChile Unidad de Gastroenterología Universidad del DesarrolloClínica Alemana7650568 SantiagoChile Unidad de Trasplante Hepático Hospital del SalvadorUnidad de GastroenterologíaClínica Las Lilas7510524 SantiagoChile Sección de Gastroenterología Departamento de MedicinaHospital Clínico Universidad de ChileChile8380456 SantiagoChile Sección de Gastroenterología Hospital Clínico Universidad de ChileEscuela de MedicinaUniversidad de Chile8380456 SantiagoChile Digestive Diseases Unit Clínica Re?aca2540364 Vi?a del MarChile Gastroenterology Department Clínica Las Condes6770128 SantiagoChile Centre for Medical Education Escuela de MedicinaPontificia Universidad Católica de Chile8330024 SantiagoChile

AIM: To build a consensus among Chilean specialists on the appropriate management of patients with nonalcoholic fatty liver disease (NAFLD) in clinical practice.

关键词： Nonalcoholic fatty liver disease Steatosis Consensus Evidence-based medicine Treatment

Magnetochronology of Mid-Miocene mammalian fauna in the Lanzhou Basin,northeastern Tibetan plateau:Implications for Asian mammal migration

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Geoscience Frontiers 2020年第4期11卷 1337-1344页

作者： peng Zhang Hong Ao Andrew p.Roberts Yongxiang Li Qiang Sun Jianhui Zhang pengfei Sun Xiaoke Qiang State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China CAS Center for Excellence in Quaternary Science and Global Change Xi’an 710061China Open Studio for Oceanic-Continental Climate and Environment Changes Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266061China School of Geography and Information Engineering China University of GeosciencesWuhan 430074China Research School of Earth Sciences Australian National UniversityCanberraACT2601Australia State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China College of Geology and Environment Xi’an University of Science and TechnologyXi’an 710054China School of Earth Science and Engineering Hebei University of EngineeringHandan 056038China

The Quantougou(QTG) Fauna in central Lanzhou Basin is an important late Mid-Miocene fauna on the northeastern Tibetan plateau margin,but its numerical age remains a matter of ***,we present a new magnetostratigraphic record for a fluvio-lacustrine section to further constrain the age of the QTG *** suggest that the studied section spans from polarity chrons C5Cn.2n to C5 n.2n or C5 An.1n,with ages of ca.16.5 Ma to 10 Ma or 16.5 Ma to 12 *** QTG Fauna is located at the top of polarity chron C5r.3 r or C5 Ar.2 r,which corresponds to an age of 11.7 Ma or 12.8 Ma for the ***,the associated Myocricetodontinae(a subfamily of Gerbillidae,Rodentia) is suggested to have appeared in the Lanzhou Basin at 11.7 Ma or 12.8 Ma,which is the oldest Myocricetodontinae in East Asia but is still much younger than the ~20 Ma appearance of this subfamily in West and South *** age data support the interpretation that East Asian Myocricetodontinae originated from South *** QTG fauna further suggest a dry and open grassland environment,which is consistent with global cooling after the Mid-Miocene Climatic Optimum.

关键词： Magnetostratigraphy Miocene Tibetan plateau Lanzhou Basin Mammal migration Myocricetodontinae

DESIGN CONSIDERATION OF ERBIUM DOpED FIBER FOR EFFICIENT L-BAND EDFAs

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光子学报 2000年第12期29卷 1138-1140页

作者： Luo Jie,Ye peida School of Telecommunication Engineering,Beijing University of posts and Telecommunications, Beijing 100876,p.R.China Wu Shujian,Chen Shuling Wuhan Research Institute of posts and Telecommunications,Wuhan 430074,p.R.China School of Telecommunication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China Wuhan Research Institute of posts and Telecommunications Wuhan 430074 China

In this paper,the relation between gain coefficient of long wavelength band(L band)EDFA and the Er 3+ ion concentration of erbium doped fiber (EDF) is *** high concentration EDF co doped with aluminium has been developed to shorten the fiber length necessary for L band amplification.L band amplification has been realized with a dual stage pumping *** the total EDF length of 18m,the small signal gain is 42.26dB and the output power is 17.5dBm at *** low concentration quenching effect is believed to be due to the high aluminium concentration in author ***-3dBm total input signal power,the gain tilt of 7 WDM channels from 1570 to 1600nm is only 0.68dB.

关键词： Erbium doped fiber L band EDFA Concentration quenching Gain flatness

Investigation of physico-chemical properties and microbial community during poultry manure co-composting process

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Journal of Environmental Sciences 2015年第2期27卷 81-94页

作者： Omar Farah Nadia Loo Yu Xiang Lee Yei Lie Dzulkornain Chairil Anuar Mohammed p.Mohd Afandi Samsu Azhari Baharuddin Department of process and Food Engineering Faculty of Engineering Universiti Putra Malaysia Institute of Tropical Forestry and Forestry products (INTROp) Putra Infoport Universiti Putra Malaysia

Co-composting of poultry manure and rubber wood sawdust was performed with the ratio of 2：1（V/V） for a period of 60 days. An investigation was carried out to study the extracellular enzymatic activities and structural degradation utilizing Fourier transform infrared spectroscopy（FT-IR）, thermogravimetry and differential thermal analysis（TG/DTA）and scanning electron microscopy（SEM）. The microbial succession was also determined by using denaturing gel gradient electrophoresis（DGGE）. The compost was able to reach its highest temperature of 71°C at day 3 and stabilized between 30 and 40°C for 8 ***, Fpase and β-glucosidase acted synergistically in order to degrade the cellulosic substrate. The xylanase activities increased gradually during the composting and reached the peak value of 11.637 U/g on day 35, followed by a sharp decline. Both Li p and Mn p activities reached their peak values on day 35 with 0.431 and 0.132 U/g respectively. The FT-IR spectra revealed an increase in aromaticity and a decrease in aliphatic compounds such as carbohydrates as decomposition proceeded. TGA/DTG data exhibited significant changes in weight loss in compost samples, indicating degradation of organic matter. SEM micrographs showed higher amounts of parenchyma exposed on the surface of rubber wood sawdust at day 60, showing significant degradation. DGGE and 16 S r DNA analyses showed that Burkholderia sp., pandoraea sp., and pseudomonas sp. were present throughout the composting process. Ornithinibacillus sp. and Castellaniella ginsengisoli were only found in the initial stage of the composting, while different strains of Burkholderia sp. also occurred in the later stage of composting.

关键词： Composting poultry manure Cellulose Denaturing gel gradient electrophoresis Microbial community