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Shape coexistence and α-decay chains of ^293LV

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Frontiers of physics 2015年第3期10卷 29-36页

作者：李兆玺张振华赵鹏巍 School of Physics and Nuclear Energy Engineering Beihang University Beijing 100191 China State Key Laboratory of Nuclear Physics and Techno.ogy School of Physics Peking University Beijing 100871 China mathematics and Physics Department North China Electric Power University Beijing 102206 China

Two recently observed ^293Lv （Z = 116） α-decay chains [Eur. Phys. J. A 48, 62 （2012）] are investigated in the framework of covariant density functional theory with PC-PK1, where the pairing correlations are treated by the Bardeen-Cooper-Schrieffer method with a density-independent zerorange force. From the calculated potential energy curves, it is found that two minima always occur, with one having an almost spherical shape and the other exhibiting a large deformed prolate shape. Originating from the ground state and the shape-isomeric state of ^293Lv, the two observed a-decay chains are constructed and the calculated Qα values are found to be in good agreement with the data.

关键词： shape coexistence α decay, ^293Lv covariant density functional theory

Rotational motions of optically trapped microscopic particles by a vortex femtosecond laser

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Chinese Physics B 2012年第10期21卷 279-282页

作者：冉玲苓郭忠义曲士良 College of Electronic Engineering Heilongjiang University Department of Optoelectronic science Harbin Institute of Technology at Weihai School of Computer and Information Hefei University of Technology

The rotational motions of the optically trapped microscopic particles by the vortex femtosecond laser beam are investigated in this *** particles can be trapped and rotated by a vortex femtosecond laser beam very effectively because the vortex beam carries orbital angular momentum due to the helical wave-front structure in assoication with the central phase *** black particles rotate in the vortex beam due to the absorption of the angular momentum transferred from the vortex *** rotating directions of the trapped particles can be modulated by reversing the topological charge of the optical vortex in the vortex femtosecond *** the rotating speeds of the trapped microscopic particles greatly depend on the topological charges of the vortex tweezer and the used pulse energies.

关键词： vortex femtosecond laser rotation particles

Efficient three-step entanglement concentration for an arbitrary four-photon cluster state

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Chinese Physics B 2013年第3期22卷 137-142页

作者：司斌苏石磊孙立莉程留永王洪福张寿 Department of Physics College of ScienceYanbian University Center for the Condensed-matter science and Techno.ogy Department of PhysicsHarbin Institute of Technology School of Physics and Optoelectronic Techno.ogy Dalian University of Technology

We propose an entanglement concentration protocol to concentrate an arbitrary partially-entangled four-photon cluster *** a pioneering three-step entanglement concentration scheme,our protocol only needs a single-photon resource to assist the concentration in each step,which makes this protocol more *** the help of the linear optical elements and weak cross-Kerr no.linearity,one can obtain a maximally-entangled cluster state via local operations and classical ***,the protocol can be iterated to obtain a higher success probability and is feasible under current experimental conditions.

关键词： cluster state entanglement concentration cross-Kerr no.linearity

Improved channel estimation based on adaptive SVm for NC-OFDm systems

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Journal of Harbin Institute of Techno.ogy(New Series) 2012年第5期19卷 67-72页

作者：贾敏顾学迈吴群 Communication Research Center Harbin Institute of Technology School of Astronautics Harbin Institute of Technology

no.-contiguous OFDm (NC-OFDm) system is popular as its characteristics of avoiding interference by spectrum sensing. The traditional channel estimation methods can no. be applied to the NC-OFDm systems directly as its special scheme. The improved time-domain channel estimation method based on adaptive support vector machine (SVm) and signal to no.se ratio (SNR) estimation is proposed for NC-OFDm systems in this paper. It adopts the spectrum sensing based on adaptive SVm at the receiver. The simulation results show that the mean square error (mSE) and bit error rate (BER) performance outperform than the conventional schemes under the same condition.

关键词： CR SVm channel estimation

Extending the nuclear chart by continuum:From oxygen to titanium

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science china(Physics,mechanics & Astrono.y) 2013年第11期56卷 2031-2036页

作者： QU XiaoYing CHEN Ying ZHANG ShuangQuan ZHAO PengWei SHIN Ik Jae LIm Yeunhwan KIm Youngman mENG Jie College of science Guizhou Minzu University School of Physics and Nuclear Energy Engineering Beihang University State Key Laboratory of Nuclear Physics and Techno.ogy School of PhysicsPeking University Rare Isotope science Project Institute for Basic Science Department of Physics Education Daegu University Department of Physics University of Stellenbosch

Nuclear masses ranging from O to Ti isotopes are systematically investigated with relativistic continuum Hartree-Bogoliubov(RCHB)theory,which can provide a proper treatment of pairing correlations in the presence of the *** O to Ti isotopes,there are 402 nuclei predicted to be bound by the density functional *** the 234 nuclei with mass measured,the root mean square(rms)deviation is 2.23 *** is found that the proton drip-lines predicted with various mass models are roughly the same and basically agree with the *** neutron drip-lines predicted,however,are quite *** to the continuum couplings,the neutron drip-line nuclei predicted are extended further neutron-rich than other mass *** comparison with finite-range droplet model(FRDm),the neutron drip-line nucleus predicted by RCHB theory has respectively2(O),10(Ne),10(Na),6(mg),8(Al),6(Si),8(P),6(S),14(K),10(Ca),10(Sc),and 12(Ti)more neutrons.

关键词： relativistic continuum Hartree-Bogouliubov theory nuclear mass table O to Ti isotopes

Erosion-Resistant Surfaces Inspired by Tamarisk

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Journal of Bionic Engineering 2013年第4期10卷 479-487页

作者： Zhiwu Han Wei Yin Junqiu Zhang Jialian Jiang Shichao Niu Luquan Ren Key Laboratory of Bionic Engineering (ministry of Education China) Jilin University Changchun 130022 P. R. China

Tamarisk, a plant that thrives in arid and semi-arid regions, has adapted to blustery conditions by evolving extremely ef- fective and robust anti-erosion surface patterns. However, the details of these unique properties and their structural basis are still unexplored. In this paper, we demonstrate that the tamarisk surface only suffers mino. scratches under wind-sand mixture erosion. The results show that the anti-erosion property of bionic sample, inspired by tamarisk surface with different surface morphologies, can be attributed to the flow rotating in the grooves that reduces the particle impact speed. Furthermore, the simulation and experiment on the erosion wear behavior of the bionic samples and bionic centrifugal fan blades show that the bionic surface with V-type groove exhibits the best erosion resistance. The bionic surface on centrifugal fan blades with opti- mum parameters can effectively improve anti-erosion property by 28.97%. This paper show more opportunities for bionic application in improving the anti-erosion performance of moving parts that work under dirt and sand particle environment, such as helicopter rotor blades, airplane propellers, rocket motor no.zles, and pipes that regularly wear out from erosion.

关键词： tamarisk anti-erosion numerical simulation bionic centrifugal fan blades

Downregulation of serum mi R-17 and mi R-106b levels in gastric cancer and benign gastric diseases

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Chinese Journal of Cancer Research 2014年第6期26卷 711-716页

作者： Qinghai Zeng Cuihong Jin Wenhang Chen Fang Xia Qi Wang Fan Fan Juan Du Yihang Guo Changwei Lin Kaiyan Yang Jingjing Li Xiaowei Peng Xiaorong Li Ke Cao Department of Plastic and Reconstructive Surgery and Dermatology Third Xiangya Hospital Central South University Department of General Surgery Xiangya Hospital Central South University Department of Oncology Third Xiangya Hospital Central South University Department of Otolaryngology Xiangya Hospital Central South University Department of General Surgery Third Xiangya Hospital Central South University Department of Head and Neck Surgery and Oncology Plastic Surgery The Affiliated Cancer Hospital of Xiangya Medical School Central South University

Altered micro RNA（mi RNA） associated with gastric cancer（GC） development and mi R-17 and mi R-106 b were differentially expressed in GC tissues. This study detected serum levels of mi R-17 and mi R-106 b expression in GC, benign gastric disease（BGD） and healthy controls to assess them as tumor markers for GC. Serum samples from 40 GC, 32 BGD（10 gastric ulcer, 14 gastric polyps, and 8 gastric ulcer with polyps） and 36 healthy individuals were subjected to quantitative reverse transcription polymerase chain reaction（q RT-PCR） analysis of mi R-17 and mi R-106 b expression. The data showed that the serum levels of mi R-17 and mi R-106 b were significantly reduced in healthy individuals and BGD patients compared to GC patients. There was a significant association of mi R-17 and mi R-106 b expression with age, but no. with other clinicopathological features, such as gender, tumor differentiation, stage and lymphatic metastasis. Further analysis showed that, in discriminating GC patients from healthy controls, mi R-17 could yield a receiver-operating characteristic（ROC） area under the curve（AUC） of 0.879 with 80.6% sensitivity and 87.5% specificity and mi R-106 b could yield an AUC of 0.856 with 75.0% sensitivity and 92.5% specificity. The combined AUC of mi R-17 and mi R-106 b was 0.913 with 83.3% sensitivity and 87.5% specificity. Collectively, these data suggest that detection of serum mi R-17 and mi R-106 b levels should be further evaluated as no.el no.-invasive biomarkers in early GC detection and surveillance of disease progression.

关键词： miR-17 miR-106b gastric cancer(GC) benign gastric disease(BGD) biomarker

Cross-Layer Scheduling Design for multimedia Applications over Cognitive Ad Hoc Networks

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china Communications 2014年第7期11卷 99-109页

作者： YANG Libiao ZHAO Honglin JIA min Communication Research Center Harbin Institute of Technology Harbin 100080 China

In this paper,we study cross-layer scheduling scheme on multimedia application which considers both streaming traffic and data traffic over cognitive ad hoc networks.A cross-layer design is proposed to optimize SU's utility,which is used as an approach to balance the transmission efficiency and heterogeneous traffic in cognitive ad hoc networks.A framework is provided for utility-based optimal subcarrier assignment,power allocation strategy and corresponding modulation scheme,subject to the interference threshold to primary user(PU) and total transmit power *** learning is adopted in subcarrier allocation strategy to avoid collision and alleviate the burden of information exchange on limited common control channel(CCC).In addition,the m/G/l queuing model is also introduced to analyze the expected delay of streaming *** results are given to demonstrate that the proposed scheme significantly reduces the blocking probability and outperforms the mentioned single-channel dynamic resource scheduling by almost 8%in term of system utility.

关键词： cognitive ad hoc networks cross-layer multimedia application common controlchannel