Feelings Which Strike a Chord, and Chords Which Strike a Feeling

The first part of this article addresses the main premise of the Theory of Musical Equilibration. It states that in contrast to previous hypotheses, music does not directly describe emotions: instead;it evokes processes of the will which the listener identifies with. It is not until these processes are experienced that music appears to take on an emotional character. The second part of the article focuses on demonstrating the emotional nature of musical harmonies. The Basic Test and the Rocky Test are presented. These tests were designed to find correlations between chords and scenes from fairy tales as well as emotional terms. 86% of the participants correlated the musical selection to the emotion outlined by the Theory of Musical Equilibration the authors developed in this context.

Chord length sampling correction analysis for dispersion fuel in Monte Carlo simulation

Dispersion fuels,knowned for their excellent safety performance,are widely used in advanced reactors,such as hightemperature gas-cooled reactors.Compared with deterministic methods,the Monte Carlo method has more advantages in the geometric modeling of stochastic media.The explicit modeling method has high computational accuracy and high computational cost.The chord length sampling(CLS)method can improve computational efficiency by sampling the chord length during neutron transport using the matrix chord length?s probability density function.This study shows that the excluded-volume effect in realistic stochastic media can introduce certain deviations into the CLS.A chord length correction approach is proposed to obtain the chord length correction factor by developing the Particle code based on equivalent transmission probability.Through numerical analysis against reference solutions from explicit modeling in the RMC code,it was demonstrated that CLS with the proposed correction method provides good accuracy for addressing the excludedvolume effect in realistic infinite stochastic media.

Comparison study on measurement of rail weld joint between inertial reference method and multi-point chord reference method

Purpose – Straightness measurement of rail weld joint is of essential importance to railway maintenance. Dueto the lack of efficient measurement equipment, there has been limited in-depth research on rail weld joint with a5-m wavelength range, leaving a significant knowledge gap in this field.Design/methodology/approach – In this study, the authors used the well-established inertial referencemethod (IR-method), and the state-of-the-art multi-point chord reference method (MCR-method). Two methodshave been applied in different types of rail straightness measurement trollies, respectively. These instrumentswere tested in a high-speed rail section within a certain region of China. The test results were ultimatelyvalidated through using traditional straightedge and feeler gauge methods as reference data to evaluate the railweld joint straightness within the 5-m wavelength range.Findings – The research reveals that IR-method and MCR-method produce reasonably similar measurementresults for wavelengths below 1 m. However, MCR-method outperforms IR-method in terms of accuracy forwavelengths exceeding 3 m. Furthermore, it was observed that IR-method, while operating at a slower speed,carries the risk of derailing and is incapable of detecting rail weld joints and low joints within the track.Originality/value – The research compare two methods’ measurement effects in a longer wavelength rangeand demonstrate the superiority of MCR-method.

Finite Element Analysis of Tubular KK Joint under Compressive Loading

KK tubular joints are used to build jacket-type offshore structures. These joints are mostly made up of structural steel. These joints can withstand yield, buckling, and lateral loads depending on the structure’s design and environment. In this study, the Finite Element Model of the KK-type tubular joint has been created, and analysis has been performed under static loading using the Static Structural analysis system of ANSYS 19.2 commercial software and structural mechanics module of COMSOL Multiphysics. The KK tubular model is analyzed under compressive load conditions, and the resulting stress, strain, and deformation values are tabulated in both graphical and tabular form. This study includes a comparison of the outcomes from both commercial software. The results highlight that maximum stress, strain, and deformation values decrease as joint thickness increases. This study holds significant relevance in advancing the understanding of tubular KK joints and their response to compressive loading. The insights derived from the analysis have the potential to contribute to the development of more robust and reliable tubular KK joints in various engineering and structural applications. .

Envelopes of Two Families of Chords of an Ellipse

In this paper, we investigate the envelope of two special families of chords of an ellipse and prove that the envelopes are also ellipses. The obtained results are important for computerized design of the generation of envelope curves and examples are illustrated graphically with Matlab.

Critical Chords of Convex Bodies of Constant Width

In this paper, we show that when Minkowski measure of asymmetry of convex body K of constant width is bigger than a（n-1）, K has at least n＋1 critical chords, where a（n）=n＋（2n（n＋1））√1/2/n＋2.

Experiments on two-phase flow in hydraulic jump on pebbled rough bed:Part 1–Turbulence properties and particle chord time and length

This study reported and discussed turbulence characteristics,such as turbulence intensity,correlation time scales,and advective length scales.The characteristic air–water time scale,including the particle chord time and length and their probability density functions(PDFs),was investigated.The results demonstrated that turbulence intensity was relatively greater on a rough bed in the roller length,whereas further downstream,the decay rate was higher.In addition,the relationship between turbulence intensity and dimensionless bubble count rate reflected an increase in turbulence intensity associated with the number of entrained particles.Triple decomposition analysis(TDA)was performed to determine the contributions of slow and fast turbulent components.The TDA results indicated that,regardless of bed type and inflow conditions,the sum of the band-pass(T'_(u))and high-pass(T″_(u))filtered turbulence intensities was equal to the turbulence intensity of the raw signal data(T_(u)).T″_(u) highlighted a higher turbulence intensity and larger vorticities on the rough bed for an identical inflow Froude number.Additional TDA results were presented in terms of the interfacial velocity,auto-and cross-correlation time scales,and longitudinal advection length scale,with the effects of low-and high-frequency signal components on each highlighted parameter.The analysis of the air chord time indicated an increase in the proportion of small bubbles moving downstream.The second part of this research focused on the basic properties of particle grouping and clustering.

Simulation of Vertical Solar Power Plants with Different Turbine Blades

The performances of turbine blades have a significant impact on the energy conversion efficiency of vertical solar power plants.In the present study,such a relationship is assessed by considering two kinds of airfoil blades,designed by using the Wilson theory.In particular,numerical simulations are conducted using the SST K−ω model and assuming a wind speed of 3–6 m/s and seven or eight blades.The two airfoils are the NACA63121(with a larger chord length)and the AMES63212;It is shown that the torsion angle of the former is smaller,and its wind drag ratio is larger;furthermore,the resistance is increased by about 66.3%on average.Within the scope of the study,the results show that the NACA63212 airfoil is better than the AMES63212 airfoil in terms of power,with an average improvement of about 2.8%.The simulation results have a certain guiding significance for selecting turbine blade airfoils and improving turbine efficiency.

更正:2021年世界卫生组织中枢神经系统肿瘤分类(第五版)局限性星形细胞胶质瘤分类解读

由于作者本人疏忽,出现中枢神经系统肿瘤WHO分级错误,特申请将我刊2021年第21卷第9期"2021年世界卫生组织中枢神经系统肿瘤分类(第五版)局限性星形细胞胶质瘤分类解读"[1]一文第805页表1"Chordoid glioma脊索样胶质瘤1级"改为"Chordoid glioma脊索样胶质瘤2级"。

基于国密的P2P数据开放共享平台设计与实现

在数字化时代,海量的数据在流转中才能创造更多的价值,但在挖掘信息价值的同时也会带来各种数据泄露的风险。如何有效地进行数据安全防控已成为国家、单位和个人所面临的严峻挑战。为此,文中设计一种基于国密的P2P数据开放共享平台。该平台通过P2P模式进行组网,满足网络节点之间自愿发布共享数据、平等存储共享数据、点对点传输共享数据的需求。与传统的C/S模式相比,所设计平台具有去中心化、扩展性强、维护成本低等优势,且通过采用混合国密算法方案,在传输过程中能够保障数据的机密性、完整性及不可否认性。

Multi-style Chord Music Generation Based on Artificial Neural Network

With the continuous development of deep learning and artificial neural networks(ANNs), algorithmic composition has gradually become a hot research field. In order to solve the music-style problem in generating chord music, a multi-style chord music generation(MSCMG) network is proposed based on the previous ANN for creation. A music-style extraction module and a style extractor are added by the network on the original basis;the music-style extraction module divides the entire music content into two parts, namely the music-style information Mstyleand the music content information Mcontent. The style extractor removes the music-style information entangled in the music content information. The similarity of music generated by different models is compared in this paper. It is also evaluated whether the model can learn music composition rules from the database. Through experiments, it is found that the model proposed in this paper can generate music works in the expected style. Compared with the long short term memory(LSTM) network, the MSCMG network has a certain improvement in the performance of music styles.

Chord Company PowerARAY&PowerARAY Professional电源降噪产品

英国Chord Company推出了两款最新产品,PowerARAY和PowerARAY Professional。新推出的PowerARAY和PowerARAY Professional是Chord Company新一代降低及吸收噪音设备系列的最新成员。类似于先前大受好评的GroundARAY降噪棒(银手指),PowerARAY可以插在未使用的主电源插座上G&WTW-DB1000K(墙上或电源拖板),这些插座位置相邻与用在音响设备供电的插座。

一种结构化P2P协议中的自适应负载均衡方法

提出一种自适应负载均衡方法,方法采用一种被动式结点负载统计方法生成局部负载视图;一种文件访问统计方法生成局部文件访问视图;当系统内结点负载存在差异时,重载结点把指向自身的逻辑链路迁移至指向局部负载视图中的轻载结点,通过减小重载结点入度和增加轻载结点入度来减小结点间负载差异;当结点的请求负载较高时,通过局部文件访问视图计算需要缓存的热点文件及目标结点,降低承载热点文件的结点请求负载.实验结果表明,在用户查询服从Zipf分布的环境下,自适应负载均衡方法可使系统负载达到较好的均衡;缓存方法虽然在一定程度上增加了缓存和更新开销,但在一定条件下比查询消息命中缓存节省的网络开销要小,降低了系统的整体负载.

基于Chord算法的可扩展高性能元数据存储环设计

Hazel Nut是一个基于块的分级存储系统,为满足该系统元数据内存需求量大、访问速度快、动态可增长的要求,设计并实现一种可扩展高性能的元数据存储环SCRing。SCRing由元数据存储环shell ring、映射环chord ring和缓存表组成,shell ring与chord ring分别用于存储与定位数据块元数据信息,缓存表用于缓存数据块元数据在内存中的位置。通过消息摘要算法计算得到SCRing双环节点间的映射关系。依据SCRing对消息摘要算法的实际需求,结合Linux内核版本,测试并比较Linux内核支持的消息摘要算法的速度、均匀性和稳定性,得出SCRing所应采用的算法种类和使用模式,并在此基础上对SCRing读写性能进行验证,结果表明SCRing具备可扩展性和高性能,满足Hazel Nut系统元数据访问需求。

Dual-Chord:一种更加有效的分布式哈希表

在基于分布式哈希表构造的对等网中,关键字的搜索效率一直是一个非常重要的指标.Chord提出在Chord环上构建结构化的分布式哈希表.Chord协议中查找的过程是单一的顺时针方向.Dual-Chord通过对路由表的扩展,使得系统的查找策略可以根据关键字在Chord环上位置离当前节点的远近来确定查找的方向,这样大大的提高了在对等网中的查找效率.同时,Dual-Chord综合考虑了网络延时对查找的影响.在设计中也根据节点间的网络延时来优化查找的性能.实验表明,在对等网中Dual-Chord协议定义的查找算法效率比Chord定义的查找算法要高.

对等网络Chord分布式查找服务的研究

在大规模Internet网络的应用中,查找服务是对等网络系统所面临的核心问题。Chord提供了一种高效和稳定的查找服务,Chord的可扩展性特点适用于大规模对等网络系统。在节点退出或加入时,Chord提供了高效稳定的机制。基于Chord的文件共享系统(SFS)是一个用于对等网络的只读存贮系统,它可以提供高效率的、鲁棒的和负载平衡的文件存取功能。SFS采用了完全分布式体系结构(没有服务器),很容易地扩展到大规模网络。SFS核心分为二层:DHT层和Chord层,使用Chord算法来定位查找服务。

一种改进的Chord路由算法

如何有效地确定存储给定数据项的节点在P2P中非常重要。Chord是一种比较成功的P2P路由算法,但是Chord的路由表存在严重的信息冗余。提出了一种对Chord的改进算法,继承了Chord算法简单、高效、可靠、负载平衡及开销少的优点,对Chord的路由表提出了改造,增加了路由表中的有效信息,提高了查询效率。

Chord协议的最优路由表结构

给出了Chord协议路由的形式化描述,将路由过程抽象成一个整数由一个数列受限的线性表示问题.利用Chord的双向边寻求路由表结构的优化,分析并提出了Chord协议的最优路由表结构.给出了基于最优路由表结构的路由算法,证明了3倍数Chord在满环情况下为最优路由表结构.

G-Chord:一种基于Chord的路由改进算法

提出了基于区域自治的G-Chord路由算法,将Chord环进行分组,实现组内节点的自治,组间的路由和查询操作则通过组代表帮助完成.仿真实验表明,新算法能够保持与Chord接近的平均跳数,而大部分节点的路由表长度却可以得到显著地减小(如Chord环被分为5组时路由表长度减少了31%).此外,分组虽然增加了网络直径,但这种请求极少(约为请求总数的0.28%),因此对总跳数的影响几乎可以忽略.

结构化覆盖网络模型Chord研究

在P2P应用系统中,如何有效地定位分布在网络中不同节点上的数据资源一直是研究的重点。Chord模型通过提供了一个分布式的资源查找协议成功地解决了这个问题,同时Chord协议能够有效支持节点动态地加入和退出网络。文章对Chord的系统基础及特性进行了论述,并重点分析了协议所提供的文件资源查询和节点加入退出算法,从理论上论证了Chord是一种具有可扩展性的低消耗系统。