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Potential Distribution on Random Electrical Networks

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Acta Mathematicae Applicatae Sinica 2011年第3期27卷 549-559页

作者： da-qian Qian xiao-dong Zhang Department of Mathematics Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China

Let N = （G, c） be a random electrical network obtained by assigning a certain resistance for each edge in a random graph G ∈ G（n, p） and the potentials on the boundary vertices. In this paper, we prove that with ... 详细信息

关键词： Electrical network potential distribution random graphs

Three ultracold fermions in a two-dimensional anisotropic harmonic confinement

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Communications in Theoretical Physics 2022年第4期74卷 85-90页

作者： Yue Chen da-Wu xiao Peng Zhang Department of Physics Renmin University of ChinaBeijing 100872China Beijing Computational Science Research Center Beijing 100193China Department of Physics Centre for Quantum Coherenceand The Hong Kong Institute of Quantum Information Science and TechnologyThe Chinese University of Hong KongShatinNew TerritoriesHong KongChina

We calculate the energy spectrum of three identical fermionic ultracold atoms in two different internal states confined in a two-dimensional anisotropic harmonic *** the solutions of the corresponding two-body problems obtained in our previous work(Chen et al 2020 ***.A 101,053624),we derive the explicit transcendental equation for the eigen-energies,from which the energy spectrum is *** results can be used for the calculation of the 3rd Virial coefficients or the studies of few-body dynamics.

关键词： ultracold atom three-body problem two-dimensional system

MATHEMATICAL MODELING OF OIL SPILL ON THE SEA AND APPLICATION OF THE MODELING IN daYA BAY

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Journal of Hydrodynamics 2007年第3期19卷 282-291页

作者： CHEN Hai-zhou LI da-ming LI xiao School of Civil Engineering Tianjin University Tianjin 300072

Through the study of the theory of oil spill model, a mathematical modeling of oil spill on the sea is developed which with the consideration of spread, diffusion, drifting and attenuation of oil slick is influenced by evaporation and emulsification factors. A model that under the effect of ocean dynamic condition of tide, wind and wave, using Monte Carlo method to simulate the movement of oil slick is established. The modeling is applied to calculate and predict pollution range of oil spill at oil quay and oil ship in daya Bay. The prediction results have basically shown the pollution situation by emergency of oil spill on the sea.

关键词： oil spill on the sea spread of oil slick diffusion of oil slick Monte Carlo method bay contamination

Repairing whole facial nerve defects with xenogeneic acellular nerve grafts in rhesus monkeys

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Neural Regeneration Research 2022年第5期17卷 1131-1137页

作者： Guo-Chen Zhu da-Jiang xiao Bi-Wen Zhu Yan xiao Department of Otorhinolaryngology-Head and Neck Surgery Affiliated Wuxi No.2 People’s Hospital of Nanjing Medical UniversityWuxiJiangsu ProvinceChina Department of Otorhinolaryngology-Head and Neck Surgery Affiliated Wuxi Clinical College of Nantong UniversityWuxiJiangsu ProvinceChina College of Animal Science&Technology Zhongkai University of Agriculture and EngineeringGuangzhouGuangdong ProvinceChina Department of Pathology Affiliated Wuxi No.2 People’s Hospital of Nanjing Medical UniversityWuxiJiangsu ProvinceChina

Acellular nerve allografts conducted via chemical extraction have achieved satisfactory results in bridging whole facial nerve defects clinically,both in terms of branching a single trunk and in connecting multiple branches of an extratemporal ***,in the clinical treatment of facial nerve defects,allogeneic donors are *** this experiment,we exposed the left trunk and multiple branches of the extratemporal segment in six rhesus monkeys and dissected a gap of 25 mm to construct a monkey model of a whole left nerve *** monkeys were randomly assigned to an autograft group or a xenogeneic acellular nerve graft *** the autograft group,the 25-mm whole facial nerve defect was immediately bridged using an autogenous ipsilateral great auricular nerve,and in the xenogeneic acellular nerve graft group,this was done using a xenogeneic acellular nerve graft with *** of facial symmetry,nerve-muscle electrophysiology,retrograde transport of labeled neuronal tracers,and morphology of the regenerated nerve and target muscle at 8 months postoperatively showed that the faces of the monkey appeared to be symmetrical in the static state and slightly asymmetrical during facial movement,and that they could actively close their eyelids *** degree of recovery from facial paralysis reached House-Brackmann grade II in both *** muscle action potentials were recorded and orbicularis oris muscles responded to electro-stimuli on the surgical side in each *** Gold-labeled neurons could be detected in the facial nuclei on the injured *** staining showed abundant neurofilament-200-positive axons and soluble protein-100-positive Schwann cells in the regenerated nerves.A large number of mid-graft myelinated axons were observed via methylene blue staining and a transmission electron *** together,our data indicate that xenogeneic acellular nerve grafts from minipigs are safe and effec

关键词： acellular nerve compound muscle action potentials facial nerve defect facial symmetry monkey nerve graft nerve regeneration retrograde labeling test synaptophysin xenogeneic

Characteristic pattern of human prostatic growth with age

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Asian Journal of Andrology 2002年第4期4卷 269-271页

作者： Shu-Jie XIA xiao-Xin XU Jian-Bao TENG Chun-xiao XU xiao-da TANG Department of Urology Shanghai 1st People's HospitalShanghai 200080China Department of Urology Linqu People's HospitalLinquShandong 262600China Department of Urology Shandong Provincial HospitalJinan 250021China

Aim: To study the characteristic pattern of the age-related growth of the human prostate gland. Methods: The volume (weight) of the prostate in 1,601 males, aged from newborn to 92 years, was determined by Bultrasonography. Results: Prostatic volume determination by B-ultrasonography in 1601 males (1301 normal subjects and 300 BPH patients) pointed out that the age-stratified growth of human prostate could be categorized into 4 life stages: (1) the first slow growing phase (from newborn to 9 years): the prostate grows slowly at a rate of 0.14g per year; (2) the first rapid growing phase (from 10 to 30 years): the prostate grows at a rate of 0.84 g per year; (3) the second slow growing phase (from 30 to 50 years), the prostate grows at a rate of 0.21 g per year; (4) the second rapid growing phase (from 50 to 90 years): the prostate grows at one of the following rates: in one group the growth rate is of 0.50 g per year and in the other 1.20 g per year, leading to benign prostatic hyperplasia (BPH). Conclusion: The volumes of the prostate are different in different age groups and it grows with age at different rates in four life phases. The prostate growth in phases can be expressed by the following equation: Y=19.36+1.36X'-0.58X'2+0.33X'3, where Y=prostate volume, X=age (up to 70 years), X'=(X-35.5)/10. (Asian JAndrol 2002 Dec; 4: 269-271)

关键词： prostatic hypertrophy age factor B-ultrasonography androgen

An air cavity method for increasing the underwater acoustic targets strength of corner reflector

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Defence Technology（防务技术） 2020年第2期16卷 493-501页

作者： Yi Luo Xin Chen da-wei xiao Wu-di Wen Tao-tao Xie Dept.of Weaponry Eng Naval University of EngineeringWuhan 430033China

In order to improve the underwater acoustic target strength of comer reflectors,according to the principle of acoustic impedance mismatch of the boundary layer,the method of using air cavity to increase the underwater acoustic target strength of corner reflectors is *** acoustic reflection coefficients of underwater air layer and single layer metal sheet are calculated and *** results show that the reflection coefficient of single layer metal sheet is greatly affected by frequency and incidence angle,and the reflection coefficient of air layer in water is large and little affected by frequency and incidence *** this basis,a new kind of airfilled cavity corner reflector is *** acoustic scattering characteristics of underwater airfilled cavity comer reflector are calculated cumulatively,and the results are compared with the monolayer metal sheet corner *** simulation results show that the acoustic reflection effect of the airfilled cavity corner reflector is *** order to verify the correctness of the method,the test was carried out in the silencing *** experimental results show that the simulation results are in good agreement with the experimental results,and the airfilled cavity can improve on acoustic reflection performance of the underwater corner reflector.

关键词： Underwater corner reflector Acoustic target strength Air cavity Acoustic impedance mismatch

Teleportation for an Unknown Entangled State Without Any Joint Measurement via Josephson Charge Qubits

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Communications in Theoretical Physics 2008年第5期49卷 1195-1198页

作者： LI da-Chuang ZHENG xiao-Hu DONG Ping CAO Zhuo-Liang Key Laboratory of Opto-electronic Information Acquisition and Manipulation Ministry of Education School of Physics＆ Material Science Anhui University Hefei 230039 China

An experimentally feasible scheme for teleportation of an arbitrary unknown entangled state is proposed. Our scheme is based on Josephson charge qubits, where we do not need any joint measurement. Moreover the successful probability and fidelity of the teleportation can both reach 1.0. The current scheme can be realized within the current experimental technology.

关键词： quantum teleportation Bell-state measurement Josephson charge qubits

Kinetic Phase Transition in A_2+2B_2→2B_2A Reaction System with Particle Diffusion

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Communications in Theoretical Physics 2008年第4期49卷 960-964页

作者： HUA da-Yin WENG xiao-Yan WANG Lie-Yan CHEN Ting Physics Department Ningbo University Ningbo 315211 China

A lattice gas model is presented for the A2 ＋2B2 → 2B2A reaction system with particle diffusion in two dimensions. In the model, B2 dissociates in the random dimer-filling mechanism and A2 dissociates in the end-on dimer filling mechanism. A reactive window appears and the system exhibits a continuous phase transition from a reactive state to a ＂B ＋ vacancy＂ covered state with infinitely many absorbing states. When the diffusion of particle B is considered, there are only two absorbing states. It is found that the critical behavior of the continuous phase transition changes from the directed percolation （DP） class to the pair contact process with diffusion （PCPD） class.

关键词： non-equilibrium phase transition reaction diffusion system

data streams classification with ensemble model based on decision-feedback

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The Journal of China Universities of Posts and Telecommunications 2014年第1期21卷 79-85页

作者： LIU Jing XU Guo-sheng ZHENG Shi-hui xiao da GU Li-ze Information Security Center Beijing University of Posts and Telecommunications National Engineering Laboratory for Disaster Backup and Recovery Beijing University of Posts and Telecommunications

The main challenges of data streams classification include infinite length, concept-drifting, arrival of novel classes and lack of labeled instances. Most existing techniques address only some of them and ignore others. So an ensemble classification model based on decision-feedback（ECM-BDF） is presented in this paper to address all these challenges. Firstly, a data stream is divided into sequential chunks and a classification model is trained from each labeled data chunk. To address the infinite length and concept-drifting problem, a fixed number of such models constitute an ensemble model E and subsequent labeled chunks are used to update E. To deal with the appearance of novel classes and limited labeled instances problem, the model incorporates a novel class detection mechanism to detect the arrival of a novel class without training E with labeled instances of that class. Meanwhile, unsupervised models are trained from unlabeled instances to provide useful constraints for E. An extended ensemble model Ex can be acquired with the constraints as feedback information, and then unlabeled instances can be classified more accurately by satisfying the maximum consensus of Ex. Experimental results demonstrate that the proposed ECM-BDF outperforms traditional techniques in classifying data streams with limited labeled data.

关键词： ensemble classification novel class concept drifting decision-feedback