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World Journal of Gastroenterology 2015年第21期21卷 6665-6674页

作者： Ping Zhou jie Xia Yong-jie Zhou jun Wan Li Li Ji Bao Yu-jun shi Hong Bu Laboratory of Pathology West China HospitalSichuan University Department of Pathology West China HospitalSichuan University Department of Pathology Affiliated Hospital of North Sichuan Medical College

AIM:To investigate whether the proportions of acetylhistone-positive hepatocytes could be used as markers of deteriorating liver ***:In total,611 cirrhotic cases from 3701 patients who were diagnosed during the past 15 years were screened,and 152 follow-up cases were *** tissue microarray was prepared for immunohistochemistry to examine acetyl-histone *** proportions of positive hepatocytes were recorded,and their correlations to clinical and laboratory indicators were analyzed ***:The proportions of H2AK5ac+,H3K9/K14ac+ and H3K27ac+ hepatocytes gradually increased with deteriorating liver function and with increasing levels of serum markers of liver *** the follow-up cases,patients with > 70% H2AK5ac+,H3K9/K14ac+ or H3K27ac+ hepatocytes had statistically lower survival rates(P 70% H2AK5ac+ or H3K27ac+ hepatocytes were strong independent predictors of overall survival(P < 0.05).CONCLUSION:The proportions of acetyl-histonepositive hepatocytes are closely associated with the liver function and prognosis of cirrhotic patients.

关键词： Histone acetylation Cirrhosis Liver function Prognosis

Electrochemical and analytical characterization of three corrosion inhibitors of steel in simulated concrete pore solutions

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International Journal of Minerals,Metallurgy and Materials 2012年第1期19卷 38-47页

作者： Jin-jie shi Wei Sun School of Materials Science end Engineering Southeast University Nanjing 211189 China Jiangsu Key Laboratory of Construction Materials Southeast University Nanjing 211189 China

Corrosion inhibitors for steel, such as sodium phosphate （Na3PO4）, sodium nitrite （NaNO2）, and benzotriazole （BTA）, in simulated concrete pore solutions （saturated Ca（OH）2） were investigated. Corrosion behaviors of steel in different solutions were studied by means of corrosion potential （Ecorr）, linear polarization resistance （LPR）, electrochemical impedance spectroscopy （EIS）, and potentiodynamic polarization （PDP）. A field emission scanning electron microscope （FESEM） equipped with energy dispersive X-ray analysis （EDXA） was used for observing the microstructures and morphology of corrosion products of steel. The results indicate that, compared with the commonly used nitrite-based inhibitors, Na3PO4 is not a good inhibitor, while BTA may be a potentially effective inhibitor to prevent steel from corrosion in simulated concrete pore solutions.

关键词： steel corrosion inhibitors electrochemical analysis concrete solutions

Geosynthetics used to stabilize vegetated surfaces for environmental sustainability in civil engineering

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Frontiers of Structural and Civil Engineering 2017年第1期11卷 56-65页

作者： jie HAN jun GUO Department of Civil Environmental and Architectural Engineering the University of Kansas Lawrence KS 66044 USA

Geosynthetics, factory-manufactured polymer materials, have been successfully used to solve many geotechnical problems in civil engineering. Two common applications are earth stabilization and erosion control. Geosynthetics used for earth stabilization include but are not limited to stabilized slopes, walls, embankments, and roads. Geosynthetics used for erosion control are mostly related to slopes, river channels and banks, and pond spillways. To enhance environmental sustainability, vegetation has been increasingly planted on the facing or surfaces of these earth structures. Under such a condition, geosynthetics mainly function as surficial soil stabilization while vegetation provides green appearance and erosion protection of earth surfaces. Recently, geosynthetic or geosynthetic-like material has been used to form green walls outside or inside buildings to enhance sustainability. Geosynthetics and vegetation are often integrated to provide combined benefits. The interaction between geosynthetics and vegetation is important for the sustainability of the earth and building wall surfaces. This paper provides a review of the current practice and research in the geosynthetic stabilization of vegetated earth and building surfaces for environmental sustainability in civil engineering with the emphases on geosynthetic used for erosion protection, geosynthetic-stabilized slopes, geosynthetic-stabilized unpaved shoulders and parking lots, and geosynthetic-stabilized vegetated building surfaces.

关键词： erosion geosynthetic stabilization sustainability vegetation

Research on the Algorithm of Avionic Device Fault Diagnosis Based on Fuzzy Expert System

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Chinese Journal of Aeronautics 2007年第3期20卷 223-229页

作者： LI jie SHEN shi-tuan School of Electronics and Information Engineering Beijing University of Aeronautics and Astronautics Beijing 100083 China

Based on the fuzzy expert system fault diagnosis theory, the knowledge base architecture and inference engine algorithm are put forward for avionic device fault diagnosis. The knowledge base is constructed by fault query network, of which the basic ele- ment is the test-diagnosis fault unit. Every underlying fault cause＇s membership degree is calculated using fuzzy product inference algorithm, and the fault answer best selection algorithm is developed, to which the deep knowledge is applied. Using some examples the proposed algorithm is analyzed for its capability of synthesis diagnosis and its improvement compared to greater membership degree first principle.

关键词： fuzzy expert system fault query network fault answer best selection algorithm fuzzy theory test-diagnosis fault unit

Displaced orbits generated by solar sails for the hyperbolic and degenerated cases

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Acta Mechanica Sinica 2012年第1期28卷 211-220页

作者： Ming Xu shi-jie Xu Department of Aerospace Engineering School of AstronauticsBeihang University100191 BeijingChina

Displaced non-Keplerian orbits above planetary bodies can be achieved by orientating the solar sail normal to the sun line. The dynamical systems techniques are employed to analyze the nonlinear dynamics of a displaced orbit and different topologies of equilibria are yielded from the basic configurations of Hill＇s region, which have a saddlenode bifurcation point at the degenerated case. The solar sail near hyperbolic or degenerated equilibrium is quite unstable. Therefore, a controller preserving Hamiltonian structure is presented to stabilize the solar sail near hyperbolic or degenerated equilibrium, and to generate the stable Lissajous orbits that stay stable inside the stabilizing region of the controller. The main contribution of this paper is that the controller preserving Hamiltonian structure not only changes the instability of the equilibrium, but also makes the modified elliptic equilibrium become unique for the controlled system. The allocation law of the controller on the sail＇s attitude and lightness number is obtained, which verifies that the controller is realizable.

关键词： Solar sail Displaced orbit Stable Lissajous orbits Hyperbolic equilibrium Degenerated equilibrium

Corrosion Behavior of Cupronickel Alloy in Simulated Seawater in the Presence of Sulfate-Reducing Bacteria

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Acta Metallurgica Sinica(English Letters) 2017年第12期30卷 1201-1209页

作者： Yanyan Song Hongwei shi jun Wang Fuchun Liu En-Hou Han Wei Ke Ganxin jie jun Wang Haijun Huang CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Department of Chemistry Northeastern UniversityShenyang 110004 China State Key Laboratory of Environmental Adaptability for Industrial Products National Electric Apparatus Research Institute Co. Ltd Guangzhou 510633 China

The corrosion behavior of cupronickel alloy immersed in the simulated seawater in or without the presence of sulfate-reducing bacteria （SRB） was studied. The results of scanning electronic microscopy and electrochemical impedance spectra reveal that corrosion of the sample immersed in the simulated seawater with SRB was more serious than that immersed in the simulated seawater without SRB. The atomic force microscopy images show that after immersion for 15 days, the surface roughness of the sample in the simulated seawater with SRB was higher than that of the sample in the simulated seawater without SRB. The analysis of confocal laser scanning microscopy indicates that the average depth of the pits on the surface of the sample in the simulated seawater with SRB was almost twice deeper than that of the sample in the simulated seawater without SRB.

关键词： Microbiologically influenced corrosion Sulfate-reducing bacteria Cupronickel alloy Confocal laser scanning microscopy EIS

Superfluidity of Paired Bosons from Correlated Tunneling

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Communications in Theoretical Physics 2009年第10期52卷 611-614页

作者： YANG shi-jie Department of Physics Beijing Normal University Beijing 100875 China

We study superfluidity of paired Bosonic atoms in optical lattices. The atoms have strong repulsive on-slte energy. Single atom tunneling is severely suppressed while the atom-pair may co-tunnel by the second order quantum transition, which induces paired superfluidity as repulsive nearest-neighbor interactions are included. The mean-field phase diagram and low energy excitations are explored for a square lattice system.

关键词： superfluidity correlated tunneling pairing

Target-Searching on Percolation

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Communications in Theoretical Physics 2005年第3X期44卷 431-434页

作者： YANG shi-jie Department of Physics Beijing Normal University Beijing 100875 China

We study target-searching processes on a percolation, on which a hunter tracks a target by smelling odors it emits. The odor intensity is supposed to be inversely proportional to the distance it propagates. The Monte Carlo simulation is performed on a 2-dimensional bond-percolation above the threshold. Having no idea of the location of the target, the hunter determines its moves only by random attempts in each direction. For lager percolation connectivity p (＞～) 0.90, it reveals a scaling law for the searching time versus the distance to the position of the target. The scaling exponent is dependent on the sensitivity of the hunter. For smaller p, the scaling law is broken and the probability of finding out the target significantly reduces. The hunter seems trapped in the cluster of the percolation and can hardly reach the goal.

关键词： percolation searching scaling law

Modeling and parameter identification of linear time-varying systems based on adaptive chirplet transform under random excitation

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Chinese Journal of Aeronautics 2021年第4期34卷 56-66页

作者： jie ZHANG Zhiyu shi Lirong LI State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China Shanghai Aircraft Customer Service Co. Ltd.Shanghai 200241China

In this paper,a time–frequency algorithm based on adaptive chirplet transform for parameter modeling and identification of Linear Time-Varying(LTV)systems under random excitation is *** is assumed that the solution of responses of LTV structures is expressed as the sum of multicomponent Linear Frequency Modulated(LFM)signals in a *** the measured acceleration response is used to perform the adaptive chirplet transform,in which an integral algorithm is employed to reconstruct the velocity and displacement *** vibration differential equation with time-varying coefficients is transformed into a simple linear ***,for systems under random excitation,the input–output relation based on correlation function is also derived to estimate the parameters including physicals parameters and instantaneous modal *** full procedure of the method is presented and validated by using simulated *** results show that the presented method is accurate and robust for various LTV systems under random excitation.

关键词： Acceleration response Chirplet transform LTV systems Random excitation System parameter identification

Microsatellite DNA Variation of the Gametophyte Clones Isolated from Introduced Laminaria japonica (Phaeophyta) and L. longissima of China and Varieties Derived from them

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Journal of Integrative Plant Biology 2008年第3期50卷 352-359页

作者： Bing-jun Li Yuan-Yuan shi Guan-Pin Yang shi Che Xiao-jie Li Yi-Zhou Cong College of Marine Life Sciences Ocean University of China Qingdao 266003 China Shandong Oriental Ocean Sci-tech Co. Ltd. Yantai 264005 China College of Oceanography Yantai University Yantai 264005 China

The variation of 90 Laminaria gametophyte clones representing the introduced Laminaria japonica （Group 1） and Laminaria Iongissima （Group 2）, the varieties of L. japonica （Group 3） and the varieties derived from interspecific hybrids （Group 4） was determined with 18 microsatellite markers. The allelic diversity and Nei＇s gene diversity of Group 1 were significantly higher than those of Group 2 （2.9 vs. 1.8 and 0.414 vs. 0.161, respectively）, demonstrating that the variation of the introduced L. japonica is richer than that of L. Iongissima. Both allelic diversity and Nei＇s gene diversity of Group 3 were lower than those of Group 1, indicating that only a portion of variation of L. japonica was incorporated into the varieties of L. japonica. Significant genetic differentiation was detected between four groups and between female （Population 1 ） and male （Population 2） gametophyte clones in each group. The variation among groups accounted for 39.95%, while that among populations accounted for 21.65% of the total. The genetic distance between Group 1 and Group 4 was obviously longer than that between Group 2 and Group 4 （0.686 vs. 0.291）, indicating that maternal gametophyte clone contributed more variation to the hybrids than the paternal gametophyte clone did.

关键词： genetic diversity genetic differentiation Laminaria japonica Laminaria Iongissima microsatellite DNA marker