Extended Lorenz majorization and frequencies of distances in an undirected network

Purpose:To contribute to the study of networks and graphs.Design/methodology/approach:We apply standard mathematical thinking.Findings:We show that the distance distribution in an undirected network Lorenz majorizes the one of a chain.As a consequence,the average and median distances in any such network are smaller than or equal to those of a chain.Research limitations:We restricted our investigations to undirected,unweighted networks.Practical implications:We are convinced that these results are useful in the study of small worlds and the so-called six degrees of separation property.Originality/value:To the best of our knowledge our research contains new network results,especially those related to frequencies of distances.

Error Analysis of English Pronunciation Acquisition by Chinese Non-English Majors

Chinese non-English majors are a large group of English learners.In the process of English pronunciation acquisition,issues such as incomplete phonological knowledge,transfer of mother tongue,and overgeneralization,lead to confusion of phonemes and stress,misunderstanding of syllable structure,and errors of assimilation,drop,and epenthesis.The accuracy of English pronunciation can only be improved by knowing both English and Chinese phonological systems,strengthening the teaching of English phonological knowledge,and adopting various phonological training activities.

Usefulness of the Surgical Apgar Score to Predict the Occurrence of Major Complications in the Early Post-Operative Period of Major Surgeries: Experience of Two Second-Category Hospitals in Cameroon

Objective: The Surgical Apgar Score (SAS) is a tool for intraoperative stratification of the risk of serious complications in the early postoperative period. It varies from 0 to 10 points divided into three risk categories (0 to 4 high, 5 to 7 moderate, 8 to 10 low). The aim of the study was to evaluate its relevance in predicting the appearance of these complications. Material and methods: This descriptive and analytical study was carried out at the “Laquintinie” Hospital in Douala and at the Central Hospital in Yaounde, Cameroon. The main data were collected on a population of patients over 18 years old and recorded on a survey form. They consisted of variables of main interest and exposure variables. Univariate and multivariate statistical analysis using top-down logistic regression models made it possible to evaluate the association of each variable of main interest and each exposure variable. The association was significant at P Results: Of the 88 patients studied, the SAS was 3 hours. In multivariate, this link persisted only and strongly for the SAS OR (IC) 0.1 (0.1 - 0.2) and p = 000. Conclusion: The study found a specific and powerful link between the SAS score < 4 and the occurrence of complications in the early postoperative period, in favor of its relevance in predicting them.

Mobility of Major and Trace Elements during the Bauxitization Processes in Ngaoundal Area (Adamawa Cameroon): Implication on Mining Perspectives

This study was focused to assess major and trace elements in bauxitic duricrusts from Ngaoundal and its surroundings in order to establish their mining interest. To this end, fieldworks, mineralogical and geochemical analyses were carried out. Four facies of duricrust were identified and characterized from the summit to the top of the slope of the Ngaoundal mountain: scoriaceous, pisolitic, nodular and massive. Mineralogical and geochemical analyses performed on 16 samples, revealed a significant concentration of Al2O3 mainly in the scoriaceous facies (over 45% in grade), moderate in Fe2O3 (averaging 23.69%) and SiO2 (averaging 21.7%). Trace elements were generally low, excluding Cr (421 ppm on average), Zr (327 ppm on average and V (213 ppm on average). In addition, the limited quantities of alkalis (Na2O, K2O) and alkaline earths metals (MgO, CaO) coupled with the very high values of Chemical Index of Alteration (CIA) and Mineralogical Index of Alteration (MIA), (more than 99%) attest to the intense weathering of the studied materials. Allitization and monosiallitization constituted the crystallochemical phenomena that have led to the development of bauxitic minerals. More than 90% of gibbsite in scoriaceous facies, 52.21% - 76.01% of kaolinite in pisolitic facies and more than 40% of hematite in nodular facies were quantified. The relationships between the constitutive components indicated their interdependency during the bauxitization phenomenon. The mineralogical and geochemical properties highlighted the mining interest of the studied duricrusts to be valorized.

基于QCA的五输入Majority门设计及应用

Majority门作为多数逻辑电路的基本逻辑单元,其性能直接影响整体电路的质量.使用量子元胞自动机(QCA)设计Majority门具有结构简单的优点.本文提出了一种三层电路实现五输入Majority门的设计,并以此设计了全加器,进一步应用于多位加法器和乘法器中,与已发表的电路设计比较表明,其版图使用面积和元胞数有明显的减少,加法器元胞数和面积改进最高可达43%和87. 2%,乘法器元胞数和面积改进最高可达48. 2%和100%.

基于CNFET的三输入Majority门电路设计

Majority(MAJ)运算和反相(INV)运算组成完备集,数字逻辑电路可以用基于"MAJ/INV"的MI(Majority-Inverter)逻辑来实现。三输入MAJ门是MI逻辑电路的一种基本门电路单元。本文设计了一种基于碳纳米管场效应晶体管(Carbon Nanotube Field Effect Transistor,CNFET)的三输入MAJ门电路,并用所设计的MAJ门实现三个多输入组合逻辑电路。实验结果表明,在采用相同的器件和工艺的条件下,与现有的设计相比,所设计的MAJ门在功耗和功耗延时积上的改进最高分别达到32.5%和45.3%。

基于Majority逻辑门映射的电路面积优化

提出了一种采用三输入Majority逻辑门(M门)和反相器实现电路逻辑功能的电路面积优化算法.该算法首先用动态规划策略完成电路的AIG(And-Inverter Graph)切割,然后通过搜索适合M门覆盖的AIG子结构以及与门和M门之间的等效替代,将AIG转换为适合M门映射的MIG(Majority-Inverter Graph),最后用Ω法则和Ψ法则对MIG进行简化,得到节点数更少的MIG,从而实现基于M门映射的电路面积优化.优化算法用C语言实现,并用MCNC电路测试.结果表明,相比于逻辑综合工具ABC的结果,用M门映射后电路面积可得到平均约12%左右的优化.

Lower Bounds on the Majority Domination Number of Graphs

Let G=(V,E) be a simple graph. For any real valued function f∶V→R and SV, let f(S)=∑ u∈S?f(u). A majority dominating function is a function f∶V→{-1,1} such that f(N)≥1 for at least half the vertices v∈V. Then majority domination number of a graph G is γ maj(G)=min{f(V)|f is a majority dominating function on G}. We obtain lower bounds on this parameter and generalize some results of Henning.

Coalition Formation in Weighted Simple-majority Games under Proportional Payoff Allocation Rules

In this paper, we introduce a simple coalition formation game in the environment of bidding, which is a special case of the weighted majority game （WMG）, and is named the weighted simple-majority game （WSMG）. In WSMG, payoff is allocated to the winners proportional to the players powers, which can be measured in various ways. We define a new kind of stability： the counteraction-stability （C-stability）, where any potential deviating players will confront counteractions of the other players. We show that C-stable coalition structures in WSMG always contains a minimal winning coalition of minimum total power. For the variant where powers are measured directly by their weights, we show that it is NP-hard to find a C-stable coalition structure and design a pseudo-polynomial time algorithm. Sensitivity analysis for this variant, which shows many interesting properties, is also done. We also prove that it is NP-hard to compute the Holler-Packel indices in WSMGs, and hence in WMGs as well.

A Comparative Study of Majority/Minority Logic Circuit Synthesis Methods for Post-CMOS Nanotechnologies

The physical limitations of complementary metal-oxide semiconductor?(CMOS) technology have led many researchers to consider other alternative technologies. Quantum-dot cellular automate (QCA), single electron tunneling (SET), tunneling phase logic (TPL), spintronic devices, etc., are some of the nanotechnologies that are being considered as possible replacements for CMOS. In these nanotechnologies, the basic logic units used to implement circuits are majority and/or minority gates. Several majority/minority logic circuit synthesis methods have been proposed. In this paper, we give a comparative study of the existing majority/minority logic circuit synthesis methods that are capable of synthesizing multi-input multi-output Boolean functions. Each of these methods is discussed in detail. The optimization priorities given to different factors such as gates, levels, inverters, etc., vary with technologies. Based on these optimization factors, the results obtained from different synthesis methods are compared. The paper also analyzes the optimization capabilities of different methods and discusses directions for future research in the synthesis of majority/minority logic networks.

Improved SMB speckle filtering of polarimetric SAR data with synergistic use of orientation angle compensation and spatial majority rule

The scattering-model-based(SMB)speckle filtering for polarimetric SAR(Pol SAR)data is reasonably effective in preserving dominant scattering mechanisms.However,the efficiency strongly depends on the accuracies of both the decomposition and classification of the scattering properties.In addition,a relatively weak speckle reduction particularly in distributed media was reported in the related literatures.In this work,an improved SMB filtering strategy is proposed considering the aforementioned deficiencies.First,the orientation angle compensation is incorporated into the SMB filtering process to remedy the overestimation of the volume scattering contribution in the Freeman-Durden decomposition.In addition,an algorithm to select the homogenous pixels is developed based on the spatial majority rule for adaptive speckle reduction.We demonstrate the superiority of the proposed methods in terms of scattering property preservation and speckle noise reduction using L-band Pol SAR data sets of San Francisco that were acquired by the NASA/JPL airborne SAR(AIRSAR)system.

What Makes a Good Second Language Learner from the Point of Majority Language Contexts

The reason to choose this topic is because among three types of context in natural second language learning settings,majority language contexts are undoubtedly the most important type to help L2 learners enhance their proficiencies of target languages in an effective way.The first part of the paper is review of the researches that have been conducted concerning majority language contexts.From following chapters,analysis will be made on the deficiencies of L2 learning and teaching in China as well as necessities of majority language contexts.Finally,basic strategies will be proposed to help L2 learners overcome various problems in majority language contexts.

基于majority和median表决算法的混合表决算法

本文提出结合majority和median的表决算法，问题得到较好改善：首先使用majority表决算法进行工作，当出现无法表决的情况时，计算数据分散程度，如果小于某个设定安全阈值，则使用median表决算法来处理这种情况，若大于安全阈值，则输出一个无法表决的信号。最终的仿真测试表明：结合majority和median表决系统是一种可行的方法，能够提高表决系统输出正确率；错误率虽然有小幅增加，但能够有效改善majority无法输出的情况，同时正确率有一定程度的提高。本文提出的表决算法可以适用于需要提高输出正确率并且可以适当降低安全性的应用环境，测试结果表明对于连续信号和离散信号都有较好的效果。

Reversible Digital Image Watermarking Scheme Using Bit Replacement and Majority Algorithm Technique

The current paper presents a new digital watermarking method through bit replacement technology, which stores mul-tiple copies of the same data that is to be hidden in a scrambled form in the cover image. In this paper an indigenous approach is described for recovering the data from the damaged copies of the data under attack by applying a majority algorithm to find the closest twin of the embedded information. A new type of non-oblivious detection method is also proposed. The improvement in performance is supported through experimental results which show much enhancement in the visual and statistical invisibility of hidden data.

Majority Coloring of r-Regular Digraph

A majority k-coloring of a digraph D with k colors is an assignment c:V(D)→{1,2,…,k},such that for every v∈V(D),we have c(w)=c(v)for at most half of all out-neighbors w∈N^(+)(v).For a natural number k≥2,a 1/k-majority coloring of a digraph is a coloring of the vertices such that each vertex receives the same color as at most a 1/k proportion of its out-neighbours.Kreutzer,Oum,Seymour,van der Zypen and Wood proved that every digraph has a majority 4-coloring and conjectured that every digraph admits a majority 3-coloring.Gireao,Kittipassorn and Popielarz proved that every digraph has a 1/k-majority 2k-coloring and conjectured that every digraph admits a 1/k majority(2k-1)-coloring.We showed that every r-regular digraph D with r>36ln(2n)has a majority 3-coloring and proved that every digraph D with minimum outdegreeδ+>2k2(2k-1)/(k-1)^(2)ln2(n)[(2k-1)n]has a 1/k-majority(2k-1)-coloring.We showed that every r-regular digraph D with r>36ln(2n)has a majority 3-coloring and proved that every digraph D with minimum outdegreeδ+>,2k^(2)(2k-1)^(2)/(k-1)^(2)ln[(2k-1)n]has a 1/k-majority(2k-1)-coloring.And we also proved that every r-regular digraph D with r>3k^(2)(2k-1)/(k-1)^2ln(2n)has a 1/k-majority(2k-1)-coloring.

Majority Vote for Split Future

After the celebrations marking the birth of Africa’s newest nation,much work lies ahead for South Sudan by Alphonce Shiundu IN Nairobi,shirtless men,with white body powder sprinkled on their black chests and shoulders,jumped up and down singing and shouting.Not to be left behind,tall dark women in extravagant bright-colored clothes also ululated as they vigorously shook their shoulders in a beautiful,rhythmical dance.

Paths for Integrating Local Red Culture into Ideological and Political Courses of Agronomy Majors

Local red culture is an important educational resource.Integrating it into the course of agronomy majors is an important part of cultivating applied talents who grasp and love agriculture in the new era.This paper analyzes the necessity of integrating local red culture into courses of agronomy majors,discusses the current challenges,and puts forward specific recommendations.

Oral English Autonomous Learning Ability of English Majors Under the Background of the Internet and Its Improvement

The Internet is an important means of communication for contemporary college students,especially those majoring in English,to acquire knowledge about information and improve their oral proficiency.However,research on the relevant oral English autonomous learning ability of English majors shows that the overall learning situation is not satisfying.Based on the development of the concept of autonomous learning,this article explores the current situation and existing problems in oral English autonomous learning of English majors under the context of the Internet,and proposes corresponding autonomous learning strategies for improving their oral English skill.

专业评价背景下资源勘查工程专业建设提升路径

专业综合评价工作是本科教学质量保障体系的重要组成部分,该文基于江西省第二轮本科专业综合评价背景和评价指标体系,分析东华理工大学资源勘查工程专业存在的若干问题,并提出该专业在日后建设和发展的新思路和提升路径,即从提升思政质量、加强内涵建设、创建一流课程、培育一流师资和培养一流人才等方面制订教学质量提升方案,以切实提高人才培养质量,培养具有宽口径、厚基础、高素质的创新型人才,有效推动专业可持续发展。

“双一流”背景下资源勘查工程一流专业建设与探索

随着深入实施科教兴国战略、人才强国战略、创新驱动发展战略,高等教育必然要担当起新的使命和时代重任,而专业建设是高等教育体系的重要支柱,是人才培养的基础平台,资源勘查工程专业关系着我国能源资源安全,为此,在充分分析河南理工大学资源勘查工程专业建设基础上,查找目前存在的问题,对标“一流专业”和“新工科”建设要求,结合河南理工大学特色优势,探索“双一流”背景下资源勘查工程专业的建设路径,总结取得的一些成效,以期进一步促进资源勘查工程专业内涵式发展,同时为我国其他兄弟院校相关专业建设提供借鉴,为实现地球科学强国目标贡献科技和人才力量。