Antenna selection based on large-scale fading for distributed MIMO systems

An antenna selection algorithm based on large-scale fading between the transmitter and receiver is proposed for the uplink receive antenna selection in distributed multiple-input multiple-output ( D-MIMO) systems.By utilizing the radio access units ( RAU) selection based on large-scale fa-ding , the proposed algorithm decreases enormously the computational complexity .Based on the characteristics of distributed systems , an improved particle swarm optimization ( PSO) has been pro-posed for the antenna selection after the RAU selection .In order to apply the improved PSO algo-rithm better in antenna selection , a general form of channel capacity was transformed into a binary expression by analyzing the formula of channel capacity .The proposed algorithm can make full use of the advantages of D-MIMO systems , and achieve near-optimal performance in terms of channel ca-pacity with low computational complexity .     

DESIGN METHODOLOGY OF NETWORKED SOFTWARE EVOLUTION GROWTH BASED ON SOFTWARE PATTERNS

Recently,some new characteristics of complex networks attract the attentions of scientistsin different fields,and lead to many kinds of emerging research directions.So far,most of the researchwork has been limited in discovery of complex network characteristics by structure analysis in large-scalesoftware systems.This paper presents the theoretical basis,design method,algorithms and experiment results ofthe research.It firstly emphasizes the significance of design method of evolution growth for networktopology of Object Oriented(OO)software systems,and argues that.the selection and modulationof network models with various topology characteristics will bring un-ignorable effect on the processof design and implementation of OO software systems.Then we analyze the similar discipline of“negation of negation and compromise”between the evolution of network models with different topologycharacteristics and the development of software modelling methods.According to the analysis of thegrowth features of software patterns,we propose an object-oriented software network evolution growthmethod and its algorithms in succession.In addition,we also propose the parameter systems for OOsoftware system metrics based on complex network theory.Based on these parameter systems,it cananalyze the features of various nodes,links and local-world,modulate the network topology and guidethe software metrics.All these can be helpful to the detailed design,implementation and performanceanalysis.Finally.we focus on the application of the evolution algorithms and demonstrate it by a casestudy.Comparing the results from our early experiments with methodologies in empirical software engi-neering,we believe that the proposed software engineering design method is a computational softwareengineering approach based on complex network theory.We argue that this method should be greatlybeneficial for the design,implementation,modulation and metrics of functionality,structure and per-formance in large-scale OO software complex system.     

A Preliminary Analysis of Geologic & Seismologic Conditions for an Undersea Tunnel across the Taiwan Strait

1Geographyandtopogra phyoftheTaiwanStrait　TheTaiwanStraitissituatedonthesoutheastcoastofEastAsiaandcon nectedwiththeEastChinaSeainthenortheast,andwiththeSouthChinaSeainthesouthwest.Accordingtoasyn thesisofalloftheviewpointsofthema jortectonic,submarinetopographic ,hydrologicandclimatologicfeaturesandthedistributionoftheorganism ,wehaverecognizedthattheTaiwanStraitbordersupontheEastChinaSeainthenortheastdownanimaginativestraightlinefromPingtanIsland (2 5°30′N ,1 1 9°4 8′E)ofFujian…     

Investigation of electron transfer across the ice/liquid interface by scanning electro- chemical microscopy

Charge transfer across a liquid/liquid (L/L) interface is not only related to chemical sensors, drug delivery and phase transfer catalysis, but also significant for mimicking biological membranes[1—3]. The thermodynamics, kinetics and mechanism regarding of this type of heterogeneous transfer process have been intensively investigated in the past three decades. An external potential is usually applied to polarizing the interface in the case of conventional electrochemistry at L/L interfaces.…     

CHARACTERISTICS OF AKD EMULSION PREPARED BY CATIONIC STARCH WITH WELL-DEFINED STRUCTURES

INTRODUCTIONS:Alkyl Ketene Dimer (AKD) has been used as a sizing agent for more than 50 years in papermaking process. Sauer [1] synthesised the first AKD in 1947 before Downey [2] developed and patented it in 1953. Since then, many modifications have been made to the AKD emulsion with introduction of starches and polymers to optimise the sizing efficiency, stability of the emulsion and also to reduce the AKD hydrolysis rate [3, 4]. Cationic starches were developed in the 1960s to ov…     

A novel human gene spindlin1, encoding a protein localized in the cell nucleus and inducing NIH3T3 cell''s transformation

A novel human gene, spindlin1, recently cloned in our laboratory, is highly expressed in the tissue of ovary cancer. To study its biological function, a vector expressing green fluorescent-spindlin1 fusion protein was constructed and transfected into COS-7 and NIH3T3 cells by lipofectamine methods. The results showed that the fusion protein pEGFP-N1-spindlin1 was localized in the nucleus of COS-7 and NIH3T3 cells. NIH3T3 cells which could stably express spindlin1 as a result of RT-PCR analysis compared with the parental NIH3T3 cells displayed a complete morphological change, improved the cell growth and increased the percentage of cells in G2/M phase (12.6% vs control cells at 3.4%). Furthermore, overexpressed spindlin1 cells formed colonies in soft agar, more motile in migration assay in vitro and formed tumors in nude mice. Our findings provide direct evidence that spindlin1 gene may be a prooncogene which is associated with tumorigenesis.     

一类最优排序具有∨或∧型特征的随机单机调度问题

本文讨论了一类加工时间随机，机器随机故障的单机调度问题，其目标函数为：（ｉ）完成时间的平方和；（ｉｉ）平均完成时间的平方；（ｉｉｉ）平均完成时间的线性组合的期望，文中首先给出了当与机器随机故障相关的点过程为广义泊松过程时，目标函数的确定形式，然后给出了使目标函数最小的最优排序依加工时间的期望具有∨型或∧型特征的条件。     

Numerical modeling of dimethyl ether （DME） bubble growth and breakup

A numerical program is written to simulate the process of vapor bubble growth with spherical symmetry from the thermodynamic critical radius in an initially uniformly superheated liquid. The program is validated by the experimental data of superheated water. The calculated results agree with those of experiments well. The program takes into account the variations of properties with temperature precisely to simulate the DME bubble growth under flash boiling conditions. Considering the influences of pressure, surface tension and viscous stress, the linear stability analysis method is adopted to deduce the dispersion equation to represent the disturbance development during the bubble growth, and a new criterion for bubble breakup is established. The results show the bubble becomes more unstable with the increase of bubble Weber number and void fraction, and that with the increase of bubble growth rate or the decrease of initial radius ration of droplet to bubble, the breakup time of bubble becomes shorter.     

Study on Bonding of Steel-mushy Al-7graphite

The bonding of steel-mushy Al-7graphite was studied. The relationship between interfacial shear strength of bonding plate and solid fraction of Al-7graphite mushy was obtained, and the interfacial structure of bonding plate was determined. The results showed that: under the condition of 500 ℃ for preheat temperature of steel plate and 10 mm/s for rolling speed, the largest interfacial shear strength of bonding plate was 70.1 MPa when solid fraction of Al-7graphite mushy was 34.6%.     

Application of Computational Fluid Dynamics to analysis of metallurgical process for continuous casting tundishes

A series of simulations by mathematical and physical modeling on fluid flow, mass and heat transfer in continuous casting tundishes have been carried out. It was found by computational fluid dynamics (CFD) simulation that in most cases tundish flow must be treated as a non-isothermal reactor due to the existence of temperature difference between the transport ladle and the tundish.The critical conditions when the non-isothermal flow in the tundish can not be neglected have been found by CFD simulation and water modeling. A direct measurement in a 40 t tundish has confirmed the simulation results.