Joint User Association and Resource Allocation for Self-Backhaul Ultra-Dense Networks

In order to meet the exponentially increasing demand on mobile data traffic, self-backhaul ultra-dense networks(UDNs) combined with millimeter wave(mm Wave) communications are expected to provide high spatial multiplexing gain and wide bandwidths for multi-gigabit peak data rates. In selfbackhaul UDNs, how to make the radio access rates of small cells match their backhaul rates by user association and how to dynamically allocate bandwidth for the access links and backhaul links to balance two-hop link resources are two key problems on improving the overall throughputs. Based on this, a joint scheme of user association and resource allocation is proposed in self-backhaul ultra-dense networks. Because of the combinatorial and nonconvex features of the original optimization problem, it has been divided into two subproblems. Firstly, to make the radio access rates of small base stations match their backhaul rates and maximize sum access rates per Hz of all small cells, a proportional constraint is introduced, and immune optimization algorithm(IOA) is adopted to optimize the association indicator variables and the boresight angles of between users and base stations. Then, the optimal backhaul and access bandwidths are calculated by differentiating the general expression of overall throughput. Simulation results indicatethat the proposed scheme increases the overall throughputs significantly compared to the traditional minimum-distance based association scheme.

Polynomial-Time Assignment-Based Cell Association with Generic Utility Functions

Cell association is a significant research issue in future mobile communication systems due to the unacceptably large computational time of traditional schemes.This article proposes a polynomial-time cell association scheme which not only completes the association in polynomial time but also fits for a generic optimization objective function.On the one hand,traditional cell association as a non-deterministic polynomial(NP)hard problem with a generic utility function is heuristically transformed into a 2-dimensional assignment optimization and solved by a certain polynomial-time algorithm,which significantly saves computational time.On the other hand,the scheme jointly considers utility maximization and load balancing among multiple base stations(BSs)by maintaining an experience pool storing a set of weighting factor values and their corresponding performances.When an association optimization is required,a suitable weighting factor value is taken from the pool to calculate a long square utility matrix and a certain polynomial-time algorithm will be applied for the association.Comparing with several representative schemes,the proposed scheme achieves large system capacity and high fairness within a relatively short computational time.

Joint User Association and Resource Allocation for mmWave Communication:A Neural Network Approach

With the rapid growth of wireless data demand and the shortage of global bandwidth,the use of millimeter-wave(mmWave)frequency band for wireless cellular networks has become the core content of the fifth generation cellular network.Because mmWave communication has different characteristics from microwave communication,using traditional optimization techniques to manage the resource of mmWave communication networks is inappropriate.In this paper,we propose a neural network-based algorithm to solve the joint user association and resource allocation for mmWave communication system with multi-connectivity(MC)and integrated access backhaul(IAB).The resource allocation problem is formulated as a mixed-integer quadratically constrained quadratic programming(MIQCQP),which is very difficult to solve.First,we decompose the MIQCQP into two sub-problems,i.e.,binary associated matrix sub-problem and continuous IAB ratio sub-problem.Then we propose a neural network to solve the binary associated matrix inference problem and a resource allocation algorithm to find the sub-optimal IAB ratio.Simulation results show that the proposed algorithm can achieve good performance with a fast inference speed.

A Research of the Course “Taishan Cultural Communication with the World” under Blended Learning Model and Outcome-Based Education Concept

The course “Taishan Cultural Communication with the World” has been online and offline teaching and learning for two terms based on the theoretical ideas: Blended Learning and Outcome-Based Education. This paper uses the data from one semester to state how to carry out the program and the good results. At the same time disadvantages are also the points that should be taken into consideration. From the teaching and learning practice, students have benefited from the online videos, complementary materials and discussions;they need to be guided as well, especially the guidance offline to make up. Furthermore, the balance of time online and offline is a great challenge.

Globalization and Human Rights——An interview with Associate Researcher Xu Tiebing with the Communication University of China

Human fights has always been a concept that evolves with the development of globalization. To clarify their relations, Human Rights made an interview with Xu Tiebing, an associate researcher on international studies with the Communication University of China. Xu has recently translated the French book Atlas de la Mondialisation into Chinese.

EQUATIONS OF STATE FOR HARD-SPHERE CHAIN FLUIDS AND SQUARE-WELL CHAIN FLUIDS

Based on the statistical theory for chemical association,equations of state for hard-spherechain fluids(HSCFs)and square-well chain fluids(SWCFs)can be derived through the n-particlecavity correlation function(CCF)of the corresponding reference system,where n is the chain lengthor the number of segments of a chain molecule.The reference system is a fluid composed of only cor-responding monomers.In this work,the n-particle CCF is approximated by a product of effectivetwo-particle CCFs which accounts for correlations in nearest-neighbour and next-to-nearest-neighboursegment pairs.The CCFs for SWCFs may be expressed by a product of the corresponding functionfor HSCFs and a perturbation term originated from the square-well attractive potential.All these ef-fective two-particle CCFs and perturbation terms are density dependent.The dependence is determinedmainly by using computer-simulation results.The obtained equations can excellently describecompressibility factors and second Virial coefficients for

New Approach to Bivariate Blending Rational Interpolants

Newton＇s polynomial interpolation may be the favorite linear interpolation,associated continued fractions interpolation is a new type nonlinear interpolation.We use those two interpolation to construct a new kind of bivariate blending rational interpolants.Characteristic theorem is discussed.We give some new blending interpolation formulae.

Blended Literal Communication in Translation

There is a natural tension between Literal and Communication translation methods and has been going on now for two millenniums. We must be faithful to the original meaning of the source language (SL) and accurate in our translation but flexible enough to communicate naturally to the target language (TL) readers. While it may seem hopeless to truly communicate with all languages and cultures, with the growing global economy and the more interdependent we become, it is even more important that we continue to try to blend our thoughts and hearts together. So with foolish confidence and wise trepidation, this paper will wade into the age long discussion on the practice of translation and teaching, attempting to reconcile the theories of literal or semantic and free or communication translation theories.

Mature While Growing up, Innovative While Inheriting——Exclusive Interview with Zhao Xinli, the Associate Dean of the Advertising School of Communication University of China

As the Chinese proverb goes,a man of his thirties should be independent.For a person,it s time to shoulder the responsibility he or she longs for.For a major and a School,it s time to root deep,to take responsibility and to fulfill its dream of 'a School stands for a hundred years as a tree for a thousand years'.As the Advertising School of Communication University of China embraces its 30th 'birthday',Zhao Xinli,the Associate Dean of the School,was exclusively interviewed by China’s Foreign Trade.

离聚物共混体系在溶液中分子间缔合的粘度研究

研究了磺化聚苯乙烯离聚体／聚（苯乙烯４乙烯吡啶）共混体系、磺化聚苯醚离聚体／聚（苯乙烯４乙烯吡啶）共混体系和磺化聚苯醚离聚体／胺化聚苯醚共混体系在氯仿／甲醇混合溶剂中的粘度行为，结果表明，和它们分别对应的不含离子基的共混物相比，这三个共混体系都表现出较高的比浓粘度．这是由于体系中的酸基及其盐和含氮碱基的引入，在共混组分间产生了强烈的离子相互作用，从而导致分子间的缔合，使比浓粘度提高．并讨论了溶剂体系、功能基种类及共混组分的主链结构等因素对这种分子间缔合作用的影响．

数据挖掘技术在共混材料制备的工艺研究中的应用

介绍了在共混材料制备工艺研究中数据挖掘技术的应用,重点讨论了基于关联规则的模型建立与应用的过程,并用数据挖掘技术对可交联硅烷接枝聚乙烯共混材料制备中退火工艺与材料结晶性能的关联性进行了研究。最后讨论了数据挖掘技术在高分子材料领域未来的发展方向。

留学生汉语杂糅偏误分析

本文在总结汉语第一语言杂糅语病和汉语作为二语言杂糅偏误研究的基础上,将杂糅偏误定位于一种语法形式上的偏误类型,认为杂糅是除了遗漏、误加、误代、错序以外的第五种偏误,并确定了杂糅的两种亚类型——叠加和拼接,而拼接这种亚范畴又分为平行拼接和前后拼接两种下位类型。通过对20余万字留学生作文中介语语料的考察,提出杂糅偏误产生的原因:(1)因同义、近义形式误辨而堆砌;(2)因举棋不定而纠缠。

汉英移就的形成机制与认知阐释

移就是一种超乎常规的语言变异现象,是对词语搭配的创造性运用。这种搭配表面上违反常规、悖于情理,但在具体的语言环境中却有恰到好处、新颖别致的作用。本文探讨了汉英移就的形成理据,并从概念合成理论的视角,对汉英移就中的三种跨空间映射进行了分析,进一步深化对移就意义建构的认识。

仿拟修辞的认知阐释

仿拟不仅是一种修辞方式,还是一种认知模式。联想是仿拟生成的心理基础,仿拟的表现特征是在联想的作用下形成的。求新求异、求美求雅、求简求便是仿拟生成和接受过程中的心理倾向。概念合成理论为深入认识仿拟意义构建提供了一个崭新的视角。从认知的角度观察、分析仿拟将有助于揭示其言语修辞行为的内在规律,深化修辞教学与研究。

明清时期蒙汉民族的交往交流与交融——基于蒙晋冀长城金三角区域文化遗产的调查研究

中国是统一的多民族国家,各民族长期的交往互动塑造出形态多样、内容丰富的文化遗产,这不仅是中华民族“多元一体”的重要表征,也是中华民族共同体意识的重要体现。对蒙晋冀长城金三角区域文化遗产的调查研究发现,该区域内的很多物质文化遗产与非物质文化遗产都具有同根、同源、同宗属性,具体体现在文化遗产要素的互嵌、遗产主体的相互联结以及遗产功能的相互依存上,这充分说明蒙汉民族在经济、社会、文化等多方面交往的双向性、自愿性与互补性。从文化遗产的角度审视民族的交往交流交融以及多民族国家的文化认同存续,对增强中华民族凝聚力、培育和铸牢中华民族共同体意识具有重要意义。

古代墓葬与和亲文化

体现人们身份、地位的古代墓葬,传递出当时的社会风貌、文化生活和价值观念的一些信息。承载着和亲文化的诸多墓葬,从一个侧面反映了民族交往交流交融的状况。无论是出土的古代墓葬,还是文献记载、实地调查的古代墓葬,都为和亲及和亲文化研究提供了新的材料与视角。古代墓葬所承载的和亲文化具有如下几个特点:一是分布范围广,二是多元聚合性,三是开放包容性,四是传承与创新性。通过对体现和亲文化的古代墓葬的初步梳理和研究,能够进一步加深中华民族共同体的认识。

新世纪新阶段促进民族交往交流交融问题研究

在当今世界,民族问题一直都是人们所关注的热点问题之一,而少数民族地区的发展情况,也是中国不断前进的有机组成部分。在新世纪新阶段,我国的民族工作要切实做到不断促进各民族的交往交流交融,以民族交往为契机不断加深各民族之间的了解,以民族交流为纽带不断增进各民族的团结合作,以民族交融为目的最终实现各民族的共同繁荣发展。

PDA DETECTOR FOR DS-CDMA COOPERATIVE SYSTEM

This paper considers the uplink of a cooperative Code-Division Multiple-Access (CDMA) system where parts of mobile nodes serve as source nodes while the others serve as relay nodes at any instant in time. When the non-orthogonal spreading codes are adopted,Multiple Access Interference (MAI) will exist at both the relay nodes and the base node,causing diversity gain to diminish. To mitigate MAI and exploit full advantages of cooperation,the Probabilistic Data Association (PDA) is developed at the relay nodes and the base node. Simulation results demonstrate that some performance gains can be obtained by the PDA detector over the Minimum Mean Square Error (MMSE) detector at high Signal-to-Noise Ratio (SNR) and conversely at low SNR.

关联规则挖掘方法在智能卷烟配方维护中的应用

为了保持卷烟产品质量的稳定,需要经常通过卷烟配方维护工作来对卷烟配方中的单料烟进行替换和构成比例调整。烟叶的替换问题是卷烟配方维护的关键问题。实际生产中,一般通过经验+品吸进行替换,该方法主观性强,效率较低。本研究基于H烟草公司提供的配方调整数据,运用关联规则挖掘方法挖掘数据间的隐含规则,明确了某品牌卷烟3组主要配方以及单料烟之间的替换规则。结果说明该方法可以得到有效、可行的单料烟配伍规则,可以辅助卷烟配方维护工作。

概念整合理论视野下的会意字形义研究

针对会意字形义研究相对滞后的现状,本文借鉴认知语言学的概念整合理论对会意字形义关系进行分析。文章首先讨论了会意字概念整合研究的可行性;继而讨论会意字参构意符的视觉概念表征功能,及形符与义符在概念表征方式上的差异;并在会意字概念整合分析的基础上认为会意字是表层形体由两个或两个以上表意字符组合而成,深层意义由意符所表征的概念整合而成的合体字,形体与意义之间存在概念表征关系;同时指出概念整合理论视野下的会意字研究具有多方面的研究意义。