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| 1 | Enhancing aerodynamic performances of a high-turning compressor cascade via boundary layer suction显示文摘Experimental investigation was carried out to study the effect of suction positions and suction flow rates on the aerodynamic performance of a compressor cascade with a large camber angle. The ink-trace flow visualization was conducted and the flow fields of the cascade were also measured. Three types of boundary layer suction configurations are compared,i.e. the suction surface suction,the endwall suction and the compound suction. Experimental results show that the large amount of suction flow rate gains more losses reduction than the small amount for a certain proper suction configuration,but the speed of loss decline slows down as the suction flow rate goes on increasing. Boundary layer suction on the suction surface obviously enhances the ability of the boundary layer around the midspan to withstand the negative pressure gradient of the flow passage. The range of the suction surface corner is also decreased. If the suction slot locates in the corner separation region where severe separation has happened,the flow separation will be terminated at the slot and redevelop downstream. And boundary layer suction on the endwall mainly influences the endwall corner region in remarkably delaying,lessening and reorganizing the corner separation. While the whole flow field is remarkably improved at both midspan and the corner region in the compound suction schemes. At higher suction flow rates,the aerodynamic performance of the compressor cascade is better than that with boundary layer suction simply on the suction surface or on the endwall. When the suction flow rate is 1.5% of the inlet mass flow,the compound suction scheme achieves a maximum loss reduction of 17% compared with the cascade without boundary layer suction. | GUO Shuang1, CHEN ShaoWen1, LU HuaWei2, SONG YanPing1 & CHEN Fu1 1 School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China 2 Marine Engineering College, Dalian Maritime University, Dalian 116026, China | 2010 | Science China(Technological Sciences)2010，53，10： | 14 |
| 2 | EXPLOITATION AND APPLICATIONS OF METASTABLE AUSTENITE MATRIX WEAR ALLOYS显示文摘Fe based cast alloys with double phases structure of m etastable austenite m atrix an d eutecticcarbide M7 C3 were provided with the excellent properties of high abrasion resistance andhigher i m pact toughness . An i m portant reason of high abrasion resistance is hard ness violentincreasing on the m atrix surface because of w ear easily induced m artensite transfor m ation . The exploitation and applications of m etastable austenite m atrix wear alloys of Fe C Cr Nisyste m and Fe C Cr Mn system were described in this paper . The excellent properties of thesealloys w ill be sufficiently indicated by authors’exa m ples . To exploit a class of these alloyswith high abrasion resistance and various im pact toughness for m eeting the requirem ent of dif ferent environ ment , the proble m of the structure design of metastable austenite m atrix wearalloy w as also described in this paper . | Y. Q. Ma , Y. H. Qi , X. L. Xu and L. Y. Dai Institute of Metal Material Technology , Dalian Maritime University , Dalian 116026 , China | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，5： | 12 |
| 3 | Parametric estimation of discretely sampled Gamma-OU processes显示文摘The stationary Gamma-OU processes are recommended to be the volatility of the financial assets. A parametric estimation for the Gamma-OU processes based on the discrete observations is considered in this paper. The estimator of an intensity parameter λ and its convergence result are given, and the simulations show that the estimation is quite accurate. Assuming that the parameter λ is estimated, the maximum likelihood estimation of shape parameter c and scale parameter α, whose likelihood function is not explicitly computable, is considered. By means of the Gaver-Stehfest algorithm, we construct an explicit sequence of approximations to the likelihood function and show that it converges the true (but unkown) one. Maximizing the sequence results in an estimator that converges to the true maximum likelihood estimator and the approximation shares the asymptotic properties of the true maximum likelihood estimator. Some simulation experiments reveal that this method is still quite accurate in most of rational situations for the background of volatility. | ZHANG Shibin,ZHANG Xinsheng & SUN Shuguang School of Management, Fudan University, Shanghai 200433, China Department of Mathematics, Shanghai Maritime University, Shanghai 200135, China | 2006 | Science China Mathematics2006，49，9： | 7 |
| 4 | EXPERIMENTAL STUDY OF BEDLOAD TRANSPORT IN UNSTEADY OPEN-CHANNEL FLOW显示文摘Experiments are performed to study bedload transport in both steady uniform and unsteady open-channel flows. Data of Steady uniform flow fit well with the existing formula in the literature. If the formula for sediment transport in a uniform flow is used to predict the bedload transport rate in unsteady flow, the calculated and the measured bedload transport rates are different. For the runs with predominately accelerating flow, the calculated sediment transport rate is smaller than the measured one, while for the runs with predominately decelerating flow, the calculated sediment transport rate is much larger than the measured one. Further analysis shows that if the flow intensity is calculated using the measured friction velocity instead of the bed slope, the calculated bedload transport rate using the formula for uniform flow agrees reasonably well with the measured one. | T.SONG Post-Doctoral Fellow, School of Civil and Structural Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798. Presently, Civil Engineer, Engineering Depatment, Technology Division, Maritime and Port Authority of Singapore. | 1997 | International Journal of Sediment Research1997，12，3： | 7 |
| 5 | Kuroshio warm filament and the source of the warm water of the Tsushima Current显示文摘Characteristics and evolution of the Kuroshio frontal eddies and warm filaments are analyzed according to two series of satellite images (March 5 to 7, 1986 and April 14 to 16, 1988). The results show that the frontal eddies in the East China Sea are generated at the shelf break and move along the continental slope at a speed of 15 cm/s with the Kuroshio. The frontal eddies occur about every 10 d and evolve to be warm filaments a few hundred km in length and 30-40 km in width in the area west of the Yaku-shima. Meanwhile, the existence of the warm filament was also found in the area by analysing the hydrographic data in the area west of Kyushu during May 24-June 5, 1988.The Kuroshio warm filaments move westward opposite to the Kuroshio and then turn northward at the shelf break and become the main source of the warm water of the Tsushima Warm Current. A simple dynamic explanation for the process is presented in this paper. | Guo Binghuo, Xiu Shumeng, Haruo Ishii and Yasuaki Nakamura First Institute of Oceanography, State Oceanic Administration, Oingdao, 266003, ChinaHydrographic Department, Maritime Safety Agency, Tokyo, JapanSeikai Fisheries Research Institute, Fisheries Agency Nagasaki, Japan | 1991 | Acta Oceanologica Sinica1991，10，3： | 6 |
| 6 | Studies of low-lying states of even-even Xe isotopes within the nucleon pair approximation显示文摘We study the relevance of nucleon pairs with higher spins, in addition to spin-zero and spin-two pairs (i.e., S D pairs), in low-lying states of even-even Xe nuclei. By including those higher-spin pairs in our configuration, we recalculate energy level schemes, elec trical quadrupole moments, magnetic moments and electric quadrupole transition rates, for low-lying states of even-even 128-142Xe nuclei. The agreement between our calculated results and the experimental data is substantially improved in comparison with previous studies. | ZHANG LiHua1, JIANG Hui1,2 & ZHAO YuMin1,3,4 1Institute of Nuclear, Particle, Astrophysics and Cosmology, Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China 2School of Arts and Sciences, Shanghai Maritime University, Shanghai 200135, China 3Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China 4CCAST, World Laboratory, P.O. Box 8730, Beijing 100080, China | 2011 | Science China(Physics,Mechanics & Astronomy)2011，54，S1： | 5 |
| 7 | Measurement and simulation of the two-phase velocity correlation in sudden-expansion gas-particle flows显示文摘In this paper the present authors measured the gas-particle two-phase velocity correlation in sudden expansion gas-particle flows with a phase Doppler particle anemometer(PDPA) and simulated the system behavior by using both a Reynolds-averaged Navier-Stokes(RANS) model and a large-eddy simulation(LES).The results of the measurements yield the axial and radial time-averaged velocities as well as the fluctuation velocities of gas and three particle-size groups(30 μ m,50 μ m,and 95 μ m) and the gas-particle velocity correlation for 30 μ m and 50 μ m particles.From the measurements,theoretical analysis,and simulation,it is found that the two-phase velocity correlation of sudden-expansion flows,like that of jet flows,is less than the gas and particle Reynolds stresses.What distinguishes the two-phase velocity correlations of sudden-expansion flow from those of jet and channel flows is the absence of a clear relationship between the two-phase velocity correlation and particle size in sudden-expansion flows.The measurements,theoretical analysis,and numerical simulation all lead to the above-stated conclusions.Quantitatively,the results of the LES are better than those of the RANS model. | Li-Xing Zhou.Yang Liu.Yi Xu Department of Engineering Mechanics,Tsinghua University,100084 Beijing,China Marine Engineering College,Dalian Maritime University,116026 Dalian,China | 2011 | Acta Mechanica Sinica2011，27，4： | 3 |
| 8 | DC dielectrophoresis separation of marine algae and particles in a microfluidic chip显示文摘This paper reports a microfluidic method of continuous separation of marine algae and particles by DC dielectrophoresis. The locally non-uniform electric field is generated by an insulating PDMS triangle hurdle fabricated within a PDMS microchannel. Both the particles and algae are subject to negative DEP forces at the hurdle where the gradient of local electric-field strength is the strongest. The DEP force acting on the particle or the algae depends on particles' or algae's volume, shape and dielectric properties. Thus the moving particles and algae will be repelled to different streamlines when passing the hurdle. In this way, combined with the electroosmotic flow, continuous separation of algae of two different sizes, and continuous separation of polystyrene particles and algae with similar volume but different shape were achieved. This first demonstration of DC DEP separation of polystyrene particles and algae with similar sizes illustrates the great influence of dielectric properties on particle separation and potentials for sample pretreatment. | SONG YongXin1, YANG JianDong1, SHI XiaoFei4, JIANG Hai3, WU YanBin1, PENG Ran1, WANG Qi5, GONG Ning2, PAN XinXiang1, SUN YeQing2 & LI DongQing1,31Department of Marine Engineering, Dalian Maritime University, Dalian 116026, China 2Institute of Environmental Systems Biology, Dalian Maritime University, Dalian 116026, China 3Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada 4College of Information Science and Technology, Dalian Maritime University, Dalian 116026, China 5Department of Respiratory Medicine, the Second Hospital Affiliated to Dalian Medical University, Dalian 116026, China | 2012 | Science China Chemistry2012，55，4： | 3 |
| 9 | THE PHASE-OFFSET OVERLAPPED WAVE TECHNIQUE显示文摘A new digital communication technology based on the Phase-Offset Overlapped Waves (POOW) has been introduced in this letter.The waves can be considered as a special multicarrier different from traditional ones.The sud-waves in a coded word's period of the POOW are sine waves and have the same frequencies,but different starting phases.The most important characteristic is that these sub-waves are the piecewise functions and not orthogonal in a code word period.The decoding can be implemented by solving a linear equation group.This code has very high efficiency and thus the data transmissin rate is increased greatly. | Liang Dequn (Dalian Maritime University, Dalian 116026)Liang Weihua (Dalian University of Science and Technology, Dalian 116026)Sun Changnian (Telecom Sino Group, Sunnyvale, California, USA, 94086) | 2003 | Journal of Electronics(China)2003，20，2： | 3 |
| 10 | ON THE COHOMOLOGY OF GENERALIZED RESTRICTED LIE ALGEBRAS显示文摘In [21], generalized restricted Lie algebras, defined over a field F of positive characteristic p, were introduced. In this note their cohomology, especially the so-called generalized restricted cohomology is studies. Some reduction properties are obtained. For graded Cartan type Lie algebras the author determines the first Lie-cohomology groups and the first generalized restricted cohomology groups with the coefficients in the highest weight modules from which all irreducible generalized restricted modules are derived. | SHU BIN (Institute of Applied Mathematics & Physics, Shanghai Maritime University, Shanghai 200135, China.) | 1998 | Chinese Annals of Mathematics,Series B1998，19，4： | 3 |
| 11 | A New Approach to Duffing Equation withStrong and High Order Nonlinearity显示文摘A new parameter iteration technique is proposed to solve the Duffingequation with strong and high order nonlinearity. Contrary to the linearized perturbation technique parametrized perturbation technique and variational iteration techniqueproposed by J.H. He, the frequency converged asymptotically to the exact result, not aconstant. | Jianguo LIN(Dalian Maritime University, Institute of Marine Environment, Dalian 116024, China)E-mail: linjg@pub.dl.Inpta.net.cn | 1999 | Communications in Nonlinear Science and Numerical Simulation1999，4，2： | 2 |
| 12 | DIFFERENTIAL SCANNING CALORIMETRY AND X-RAY DIFFRACTION STUDIES ON AGING BEHAVIOR OF Zn-Al ALLOYS显示文摘Decomposition processes of the quenched Zn-Al alloys were studied by differential scanning calorimetry (DSC), X-ray diffraction(XRD) and transmission electron microscopy (TEM). The results show that the stabilities of supersaturated solid solution (SSS) of Zn-Al alloy and α’ phase formed by quenching would reduce with increasing Zn content and precipitating ηZn phases even when aging at ambient temperature, so that exothermic precipitation peak in DSC curse would disappear. The activation enengy of the ηZn precipitation and their reaction enthalpy were calculated and measured. The kinetics of α’ decomposition or η-Zn formation was determined by XRD. The microstructure change during aging was observed by TEM. | X.L. Xu, Z. W. Yu, S.J. Ji, J.C. Sun and Z.K. Hei (Dalian Maritime University, Dalian 116024, China) | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，2： | 2 |
| 13 | A New Approximate Iteration Solution ofBlasius Equation显示文摘An approximate analytical solution of Blasius equation is obtained by theparameter iteration method. The comparison with Howarth’s numerical solution showsthat the accuracy of the proposed method is higher than other approximate analyticalsolutions. Further, we provide also a numerical iteration scheme which is simple, efficientand practical. | Jianguo LIN(Dalian Maritime University, Institute of Marine Environment, Dalian 116024, China)E-mail: linjg@pub.dl.lnpta.net.cn | 1999 | Communications in Nonlinear Science and Numerical Simulation1999，4，2： | 2 |
| 14 | Diabetes, oxi- dative stress, and antioxidants: a review 显示文摘 | Maritim A C Sanders R A Watkins J B | 2003 | J Biochem Mol Toxicol2003，17，1： | 1 |
| 15 | Diabetes, oxidative stress, and antioxidants: a review显示文摘 | MARITIM A C SANDERS R A WATKINS J B 3rd | 2003 | J Biochem Mol Toxicol2003，17，1： | 1 |
| 16 | Diabetes,oxidative stress and antioxidants:a review J 显示文摘 | Maritim AC Sanders RA Watkins JB | 2003 | J Biochem Mol Toxicol2003，17，1： | 1 |
| 17 | Gabor Filter Optimization Design for Iris Texture Analysis显示文摘This paper deals with an optimization design method for the Gabor filters based on the analysis of an iris texture model. By means of analyzing the properties of an iris texture image, the energy distribution regularity of the iris texture image measured by the average power spectrum density is exploited, and the theoretical ranges of the efficient valued frequency and orientation parameters can also be deduced. The analysis shows that the energy distribution of the iris texture is generally centralized around lower frequencies in the spatial frequency domain. Accordingly, an iterative algorithm is designed to optimize the Gabor parameter field. The experimental results indicate the validity of the theory and efficiency of the algorithm. | Tao Xu 1, Xing Ming 2, Xiaoguang Yang 3 1.College of Mechanical Science and Engineering, Jilin University, Changchun 130022, P.R.China 2.College of Computer Science and Technology, Jilin University, Changchun 130022, P.R.China 3.Dept of Mathematics and Physics, Dalian Maritime University, Dalian 116026,P.R.China | 2004 | Journal of Bionic Engineering2004，1，1： | 1 |
| 18 | oxidative stress,and antioxidants:a review显示文摘 | Maritim hC Sanders Rh Watkins JR Diabetes | 2003 | J Biochem Mol Toxicol2003，17，1： | 1 |
| 19 | Diabetes, oxidative stress and antioxidants 显示文摘 | MARITIM AC SANDERS RA WAT KINS JB | 2003 | Biochem Mol Toxicol2003，17，1： | 1 |
| 20 | Effects of Pycnogenol treatment on oxidative stress in streptozotocin-induced diabetic rats 显示文摘 | Maritim A Dene B A Watkins J B | 2003 | J Biochem Mol Toxicol2003，17，3： | 1 |
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