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Effects of Dietary Lysine on Growth Performance, Serum Concentrations of Insulin-Like Growth Factor-I (IGF-I) and IGF-I mRNA Expression in Growing Rabbits

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Agricultural Sciences in China 2010年第6期9卷 887-895页

作者： JING Wen-qian LI fu-chang College of Animal Science and Technology Shandong Agricultural University Tai＇an 271018 P.R.China College of Life Science Linyi Normal University Linyi 276005 P.R.China

The effects of dietary lysine on production performance,serum concentrations of metabolites,growth hormone （GH）,insulin-like growth factor-I （IGF-I） and IGF-I mRNA expression in growing rabbits were *** hundred weaned New Zealand rabbits were allocated to individual cages and randomly offered a diet containing 5.5 （L1）,6.5 （L2）,7.5 （L3）,8.5 （L4）,or 9.5 g （L5） lysine per kg *** results showed that the average daily gain （ADG） of the rabbits from L3,L4 or L5 was higher than those from L1 or L2 （P 〈 0.05）.The feed gain ratio （F/G） in the rabbits from L4 or L5 was lower than those from L1 or L2 （P 〈 0.05）.Dietary lysine did not affect serum concentrations of total protein （TP）,glucose,insulin （INS）,and growth hormone （GH）（P 〉 0.05）.The quadratic effects of lysine on the serum urea nitrogen （SUN） concentration was detected （P = 0.035）.Serum IGF-I concentrations had a trend to increase quadratically with the increasing dietary lysine （P = 0.07）.A significant correlation was found between serum IGF-I concentrations （x,ng mL-1） and ADG （y,g kg-1）： y = -0.017x2 ＋ 1.984x ＋ 20.87 （R2 = 0.8982,P = 0.003）.The relative abundance of hepatic and muscular IGF-I mRNA tended to increase with increasing dietary lysine levels （P = 0.053 and 0.082,respectively）.Providing the diets mainly consisted of corn,wheat bran and peanut vine,the most appropriate dietary lysine level for growing meat rabbits from weaning to 70 d old was found to be 8.5 g kg-1,and IGF-I may be an important factor controlling growth of weaned rabbits.

关键词： New Zealand rabbit lysine growth performance IGF-I mRNA expression

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Mechanism of broadening of slab in continuous casting

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Science China(Technological Sciences) 2011年第5期54卷 1228-1233页

作者： fu JianXun LI JingShe ZHANG Hui School of Metallurgical and Ecological Engineering Universi(y of Science& Technology Beijing Beijing 100083 China School of Mechatronics Engineering University ofJiaozuo Jiaozuo 454000 China National Engineering Research Center of Continuous Casting Technology China Iron & Steel Research Institute Group Beijing 100081

The mechanism of broadening of slab in continuous casting was studied by numerical simulations and experimental measurements in factories. The mechanism is derived by gradual exclusion of various factors related to the broadening of slab. It is concluded that the slab exposes to no constraint at the direction of narrow face. Because of the static pressure of molten steel, the slab deforms creepily in the direction that consequently results in the broadening of slab. The broadening of slab increases with casting speed and static pressure of molten steel. The decrease of secondary cooling intensity and strength of steel at high temperature also contribute to the broadening of slab. The micro-alloying plays an important role in improving the strength of steel and in reducing the broadening of slab.

关键词： broadening of slab continuous casting secondary cooling zone thermo-mecbanical viscoelastic-plastic

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Weakly stable constant mean curvature hypersurfaces

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Applied Mathematics(A Journal of Chinese Universities) 2009年第1期24卷 119-126页

作者： fu Hai-ping XU Hong-wei Center of Math. Sci. Zhejiang Univ. Hangzhou 310027 China Dept. of Math. Nanchang Univ. Nanchang 330047 China

Let M^n be an n-dimensional complete noncompact oriented weakly stable constant mean curvature hypersurface in an （n ＋ 1）-dimensional Riemannian manifold N^n＋1 whose （n - 1）th Ricci curvature satisfying Ric^N（n-1）（n - 1）c. Denote by H and φ the mean curvature and the trace-free second fundamental form of M respectively. If ｜φ｜^2 - （n- 2）√n（n- 1）｜H｜｜φ｜＋ n（2n - 1）（H^2＋ c）〉 0, then M does not admit nonconstant bounded harmonic functions with finite Dirichlet integral. In particular, if N has bounded geometry and c ＋ H^2 〉 0, then M must have only one end.

关键词： constant mean curvature weakly stable hypersurface ends

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Numerical investigation of the casing treatment mechanism with a single circumferential groove

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Science China(Physics,Mechanics & Astronomy) 2013年第2期56卷 353-365页

作者： SHI ke CHEN HaiXin fu Song School of Aerospace Tsinghua University

The paper investigates the effect of a single circumferential groove casing treatment(CGCT) on a transonic compressor rotor *** particular,the effect of the groove at different axial locations on the flow field is studied in detail and stall margin improvement is also *** present results show that the groove close to the leading edge plays a crucial role in stabilizing the near stall flow structures and,hence,improves the stall *** groove at the mid-chord-section of the blade can help exchange and transfer momentums between different directions,and suppress the flow unsteadiness,leading to increased efficiency in rotor performance and extended operation *** groove located near the blade trailing edge has limited effects on stall margin improvement and may cause additional penalty in *** comparison with the recent work on CGCT,some common flow physics can be observed.

关键词： compressor casing treatment circumferential groove transonic rotor stall margin

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karst Cave Tourism System in Zhejiang Province Based on Resource Regional Analysis

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Chinese Geographical Science 2012年第4期22卷 496-506页

作者： JIN Pingbin fu Zhiwei BAN Maosheng Department of Earth Sciences Zhejiang University Hangzhou 310027 China Beijing Tsinghua Urban Planning & DesignInstitute Beij'ing 100085 China China Academy of West Region Development Zhejiang University Hangzhou 310028 China)

karst cave tourism plays an important role in the overall tourism of Zhejiang Province, China. In analyzing the current status of karst cave tourism resources, it is crucial to develop a scientific system for optimizing resource exploitation and tourism development in the future. This study conducted an analysis of resource characteristics and regional structure in Zhejiang Province. Nearest neighbor index （NNI） method and accessibility index method were used for a comprehensive understanding of the effects of scale, strength, combination, and accessibility of karst cave tourism resources. Results indicated that karst cave tourism resources in Zhejiang Province have a significant regional influence, and that resource quality and exploitation are diverse in different regions. Among the regions, Jinhua had the highest exploitation proportion of over 60% and the lowest NNI value of 0.098. furthermore, regional analysis inferred that different karst caves demonstrate diversity in accessibility to tourism markets, among which the Lingshan Cave, Fengshui Cave, and Xianqiao Cave reveal the highest accessibility index of 2.41. Finally, we put forward a karst cave tourism system in Zhejiang Province based on the Growth Pole Theory and set up an overall scheme for karst cave tourism development. From a regional perspective analysis, the study refined the methods for regional resource re- search and provided a strategic proposal for karst cave tourism in Zheiiang Province.

关键词： regional analysis karst cave tourism resource karst cave tourism system Zhejiang Province

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The relations between the metallicity and orbital parameters of Galactic disk stars

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Science China(Physics,Mechanics & Astronomy) 2010年第7期53卷 1348-1356页

作者： LI Ji SUN JianAn fu RuiJuan College of Physics Science&Information Engineering Hebei Normal UniversityShijiazhuang 050016China

The iron abundance gradient in the Galactic disk provides fundamental constraints on the chemical evolution of this important component of the ***,there are still some arguments about the shape of the iron abundance gradient across the Galactic stellar *** provide quantitative constraints on these trends,we constructed an unbiased stellar sample from the common objects of two large *** sample consists of 4004 disk stars in the solar neighborhood with the range of metallicity [Fe/H] from ^-1.0 to ~0.5,including 3855 thin disk stars and 146 thick disk *** range of their mean Galactocentric distances R m is from ~4 to ~11 kpc,and the range of their maximum vertical distance from the Galactic Plane Z max is from 0 to ~3.5 *** relations of the stellar metallicity [Fe/H] with the orbital eccentricity e,and [Fe/H] with R m,as well as [Fe/H] with Z max are investigated in *** results showed that:(1) The orbital eccentricity of disk stars decreases with increasing metallicity,while this trend becomes flat for stars with [Fe/H]>-0.2.(2) For thin disk,there is a clear radial iron gradient of-0.051±0.005 dex/***,this metallicity gradient is discontinuous once we split the sample into the inner(Rmkpc) and outer disk(Rm≥8 kpc):a slope of about 0 dex/kpc is present in the inner disk and a slope of-0.12 dex/kpc is in the outer *** the thick disk,there is no trend of [Fe/H] with R m.(3) The vertical gradient of iron abundance is-0.146 dex/kpc and-0.251 dex/kpc for the thick and thin disks,***,the vertical abundance gradient shows a steeper trend with the evolution of the *** results confirm the collapse mechanism associated with the formation and evolution of the Galactic disk.

关键词： Galaxy Galactic disk star orbital eccentricity abundance gradient

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Hypoplastic constitutive modelling of the wetting induced creep of rockfill materials

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Science China(Technological Sciences) 2012年第7期55卷 2066-2082页

作者： fu ZhongZhi CHEN ShengShui LIU SiHong Geotechnical Engineering Department Nanjing Hydraulic Research InstituteNanjing 210024China key Laboratory of Water Science and Engineering Ministry of Water ResourcesNanjing 210029China College of Water Conservancy and Hydropower Engineering Hohai UniversityNanjing 210098China

Discrete element simulations of one-dimensional compression of breakable granular assemblies were performed to investigate the capability of the exponential compression equation suggested by *** relationship between the so-called solid hardness and the particle strength was studied so as to provide a physical background for the introduction of a time-dependent solid hardness.A hyperbolic flow rule,describing the relationship between the inclination of the strain path and the stress ratio during wetting,was proposed based on typical triaxial wetting experiments on two different rockfill *** flow rule was then extended and incorporated into the transformed stress based hypoplastic model to capture the direction of creep ***,a new density factor was introduced to the extended model to take into account the dependence of the magnitude of creep strains on the packing *** stiffness tensor given by the extended model was discussed and the flowchart for the integration of the constitutive equation was *** extended model was then embedded into a finite element program and used to simulate the triaxial compression and wetting experiments performed on the aforementioned rockfill *** agreement between the model predictions and the measured results lends sufficient credibility to the extended model in reproducing the stress-stain behaviour under loading and the creep behaviour during *** extended model and the finite element program were also used to investigate the deformation behaviour of an earth-rock dam at the end of construction and during first *** familiar phenomena such as the wetting induced settlement of the upstream shell and the movement of the dam crest towards the upstream were successfully captured by the numerical model,which confirms the feasibility of applying the extended model to dam engineering in the future.

关键词： rockfill materials wetting induced creep hypoplasticity constitutive model dam engineering

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A temporal programming model with atomic blocks based on projection temporal logic

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Frontiers of Computer Science 2014年第6期8卷 958-976页

作者： Xiaoxiao yANG yu ZHANG Ming fu Xinyu FENG State key Laboratory of Computer Science Institute of Software Chinese Academy of Sciences Beijing 100190 China Suzhou Institute for Advanced Study University of Science & Technology of China SuZhou 215123 China

Atomic blocks, a high-level language construct that allows programmers to explicitly specify the atomicity of operations without worrying about the implementations, are a promising approach that simplifies concurrent programming. On the other hand, temporal logic is a successful model in logic programming and concurrency verification, but none of existing temporal programming models supports concurrent programming with atomic blocks yet. In this paper, we propose a temporal programming model （αPTL） which extends the projection temporal logic （PTL） to support concurrent programming with atomic blocks. The novel construct that formulates atomic execution of code blocks, which we call atomic interval formulas, is always interpreted over two consecutive states, with the internal states of the block being abstracted away. We show that the framing mechanism in projection temporal logic also works in the new model, which consequently supports our development of an executive language. The language supports concurrency by introducing a loose interleaving semantics which tracks only the mutual exclusion between atomic blocks. We demonstrate the usage of αPTL by modeling and verifying both the fine-grained and coarse-grained concurrency.

关键词： atomic blocks semantics temporal logic programming verification framing

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The operation and improvement of CSNS front end

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Radiation Detection Technology and Methods 2020年第1期4卷 110-115页

作者： H.Ouyang H.Li X.Cao W.Chen T.Huang S.Liu y.Lv y.Xiao k.Xue R.Zhu S.fu S.Wang China Spallation Neutron Source(CSNS) Institute of High Energy Physics(IHEP)Chinese Academy of Sciences(CAS)Dongguan 523803China University of Chinese Academy of Science(UCAS) Beijing 100049China

Introduction Operation target beam power of China Spallation Neutron Source(CSNS),as the China's first 100 kW beam power pulsed neutron source,is now larger than 80 *** the beam power upgrading process of CSNS to 50 kW from 2018 to 2019,many improvements have been made for the front end of *** The improvements mainly focus on solving the problems of ion source instability and the radio frequency quadrupole(RFQ)sparking caused by the pre-chopped beam into RFQ.

关键词： Ion source LEBT Pre-chopper RFQ Sparking

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Corrosion inhibition of stainless steel by a sulfate-reducing bacteria biofilm in seawater

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International Journal of Minerals,Metallurgy and Materials 2012年第8期19卷 717-725页

作者： fu-shao Li Mao-zhong An Dong-xia Duan School of Chemistry and Chemical Engineering Qujing Normal University Qujing 655011 China State key Laboratory for Marine Corrosion and Protection Qingdao 266071 China Chemical Engineering School Harbin Institute of Technology Harbin 150001 China

Corrosion inhibition of stainless steel due to a sulfate-reducing bacteria （SRB） biofilm in seawater was studied. By atomic force microscopy, a layer of fish-scale-like biofilm was found to form as stainless steel coupons were exposed to the culture media with SRB, and this biofilm grew more and more compact. As a result, coupons＇ surface under the biofilm turned irregular less slowly than that exposed to the sterilized culture media. Then, physicoelectric characteristics of the electrode/biofilrn/solution interface were investigated by electro- chemical impedance spectroscopy （EIS）, and the coverage of the biofilm as well as the relative irregularity of coupons＇ surface was also re- corded by EIS spectra.. Finally, anodic cyclic polarization results further demonstrated the protective property of the biofilm. Therefore, in es- timation of SRB-implicated corrosion of stainless steel, not only the detrimental SRB metabolites but also the protective SRB biofilm as well should be taken into account.

关键词： stainless steel corrosion prevention microbiology microorganisms biofilms electrochemistry

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