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An effective framework to improve the managerial activities in global software development 一个有效的框架,以提高管理活动在全球软件开发
Q2 ENGINEERING, MECHANICAL Pub Date : 2023-01-01 DOI: 10.1515/nleng-2022-0312
Saba Siddique, Muhammad Naveed, Atif Ali, Ismail Keshta, Muhammad Islam Satti, Azeem Irshad, Zakaria Alomari, Onome Christopher Edo, Oladapo Ayodeji Diekola
Abstract Global Software Development (GSD) is a contemporary approach to software development that offers numerous advantages, including enhanced cost-effectiveness and timely delivery. It enables access to a vast pool of skilled developers and facilitates the exchange of best practices and innovative ideas within the software industry. However, effective project management plays a vital role in ensuring successful product development. Organizations that achieve project success consistently adhere to well-defined project management methodologies, resulting in desired outcomes within predefined time frames and allocated resources. The success rate of software projects significantly increases with diligent software management efforts. Nevertheless, the distributed nature of GSD presents significant challenges related to collaboration, information dissemination, and process control, which ultimately impede effective development and compromise software quality. In this study, we identify various challenges associated with the GSD process and propose strategies to overcome obstacles to effective project management. Additionally, we introduce a comprehensive framework designed to enhance managerial activities in GSD.
全球软件开发(GSD)是一种现代的软件开发方法,它提供了许多优点,包括增强的成本效益和及时的交付。它使我们能够接触到大量熟练的开发人员,并促进了软件行业内最佳实践和创新思想的交流。然而,有效的项目管理在确保成功的产品开发中起着至关重要的作用。获得项目成功的组织始终坚持定义良好的项目管理方法,在预定义的时间框架和分配的资源内产生期望的结果。随着勤奋的软件管理工作,软件项目的成功率显著提高。然而,GSD的分布式特性提出了与协作、信息传播和过程控制相关的重大挑战,这些挑战最终阻碍了有效的开发并损害了软件质量。在本研究中,我们确定了与GSD过程相关的各种挑战,并提出了克服有效项目管理障碍的策略。此外,我们引入了一个全面的框架,旨在加强GSD的管理活动。
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引用次数: 1
Dynamical structures of wave front to the fractional generalized equal width-Burgers model via two analytic schemes: Effects of parameters and fractionality 分数阶广义等宽- burgers模型的波前动力结构的两种解析格式:参数和分数阶的影响
Q2 ENGINEERING, MECHANICAL Pub Date : 2023-01-01 DOI: 10.1515/nleng-2022-0328
Mst. Razia Pervin, Harun-Or- Roshid, Alrazi Abdeljabbar, Pinakee Dey, Shewli Shamim Shanta
Abstract This work focuses on the fractional general equal width-Burger model, which describes one-dimensional wave transmission in nonlinear Kerr media with combined dispersive and dissipative effects. The unified and a novel form of the modified Kudryashov approaches are employed in this study to investigate various analytical wave solutions of the model, considering different powers of nonlinearity in the Kerr media. As a result, a wide range of structural solutions, including trigonometric, hyperbolic, rational, and logarithmic functions, are formulated. The achieved solutions present a kink wave, a collision of kink and periodic peaked soliton, exponentially increasing wave profiles, and shock with a dark peaked wave. The obtained solutions are numerically demonstrated for specific parameter values and general parametric powers of nonlinearity. We analyzed the effect of existing parameters on the obtained wave solutions with numerical graphics. Moreover, the stability of the model is analyzed with a perturbed system. Furthermore, a comparison with published results in the literature is provided, highlighting the differences and similarities. The achieved results showcase the diversity of structural solutions obtained through the proposed approaches.
本文研究了分数阶一般等宽- burger模型,该模型描述了非线性Kerr介质中具有色散和耗散复合效应的一维波传输。本研究采用统一的和一种新颖形式的修正Kudryashov方法来研究模型的各种解析波解,考虑Kerr介质中非线性的不同幂次。因此,广泛的结构解决方案,包括三角,双曲,有理,和对数函数,被公式化。所得到的解表现为扭结波、扭结波与周期峰孤子的碰撞、呈指数增长的波廓以及暗峰波激波。对非线性的特定参数值和一般参数幂进行了数值验证。用数值图形分析了现有参数对得到的波浪解的影响。此外,还对模型的稳定性进行了摄动分析。此外,与已发表的文献结果进行了比较,突出了差异和相似之处。所取得的结果展示了通过所提出的方法获得的结构解决方案的多样性。
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引用次数: 2
Research on the artificial control method of the gas nuclei spectrum in the small-scale experimental pool under atmospheric pressure 大气压下小型实验池气体核谱的人工控制方法研究
Q2 ENGINEERING, MECHANICAL Pub Date : 2023-01-01 DOI: 10.1515/nleng-2022-0296
Meicheng Yang, Lijia Yang, Daojiang Li, Zhiyong Jiang, Shuo Hou, Haichao Li
Abstract With the improvement of the accuracy of experimental devices and measuring instruments, cavitation experiments such as cross-media vehicles and propellers have been carried out in small pools. However, the water quality in the laboratory and the engineering application waters differs, especially the concentration of the gas nuclei that cause cavitation, resulting in experimental results that differ from prototype experimental results, and the scale effect occurs. In order to reduce the influence of the scale effect, according to the conditions of cavitation, gas nuclei can be mixed with water before the experiment is formally implemented. Aeration behavior will affect the size and concentration of gas nuclei (gas nuclei spectrum) in water. In order to obtain better experimental results, it is necessary to clarify the variation of the gas nuclei spectrum in small-scale experimental pools before and after aeration, so as to master aeration technology. Through research, it is found that the artificial aeration method can effectively change the gas nuclei spectrum in water and increase the concentration of gas nuclei. By using the underwater acoustic measurement method, the change in the gas nuclei spectrum can be captured sensitively. The gas nuclei spectrum in water after aeration is in good agreement with the mathematical model of gas nuclei spectrum under non-artificial intervention, which shows that the distribution of gas nuclei in water under artificial aeration is similar to that under non-artificial intervention, which is conducive to the occurrence of cavitation. At the same time, it shows that the combination of experiment and numerical method can reduce the measuring state and the measurement cost and improve the measurement efficiency.
随着实验装置和测量仪器精度的提高,跨介质车辆和螺旋桨等空化实验已经在小水池中进行。但由于实验室水质与工程应用水体不同,尤其是引起空化的气核浓度不同,导致实验结果与原型实验结果不同,出现尺度效应。为了减少尺度效应的影响,在实验正式实施之前,可以根据空化条件将气核与水混合。曝气行为会影响水中气核的大小和浓度(气核谱)。为了获得更好的实验结果,有必要弄清小规模实验池在曝气前后的气核谱变化,从而掌握曝气技术。通过研究发现,人工曝气方法可以有效地改变水中气核谱,提高气核浓度。利用水声测量方法,可以灵敏地捕捉到气体核谱的变化。曝气后水中气核谱与非人工干预下气核谱的数学模型吻合较好,说明人工曝气下水中气核分布与非人工干预下相似,有利于空化的发生。同时,实验与数值方法相结合可以降低测量状态,降低测量成本,提高测量效率。
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引用次数: 0
A review of tiger conservation studies using nonlinear trajectory: A telemetry data approach 基于非线性轨迹的老虎保护研究综述:遥测数据方法
IF 8.3 Q2 ENGINEERING, MECHANICAL Pub Date : 2023-01-01 DOI: 10.1515/nleng-2022-0235
Richa Choudhary, Susheela Dahiya, T. Choudhury
Abstract Radio telemetry is being used in India to capture the location and movements of radio-collared wild animals. Radio telemetry data analysis has changed the scenario for wildlife conservation. It has provided many models and solutions for natural habitat utilization, genetic diversity, and even implementing green corridors for the species. Insights drawn from the data collected through radio telemetry from radio-collared animals have provided impactful information to understand the wild animal’s ecology. In the past few years, India has remarkably improved the population of tigers using telemetry studies and other conservation methods. In this study, a review of the telemetry studies conducted for tigers in India in the past decade has been presented. This study summarizes the telemetry studies of tigers in India and discusses how telemetry has enhanced the knowledge of ecologists and scientists to understand tiger ecology. This study also discusses the challenges and issues of conducting telemetry studies on tigers in India. Finally, the authors address the gaps in understanding the tiger’s ecology based on these studies and outline how radio telemetry can address these issues to better understand and conserve tigers.
印度正在使用无线电遥测技术来捕捉戴无线电项圈的野生动物的位置和运动。无线电遥测数据分析已经改变了野生动物保护的情况。它为物种的自然栖息地利用、遗传多样性甚至绿色走廊的实施提供了许多模型和解决方案。通过无线电遥测从戴有无线电项圈的动物身上收集到的数据,为了解野生动物的生态提供了有影响力的信息。在过去的几年里,印度通过遥测研究和其他保护方法显著提高了老虎的数量。在这项研究中,对过去十年在印度对老虎进行的遥测研究进行了回顾。本研究总结了印度老虎的遥测研究,并讨论了遥测技术如何提高生态学家和科学家对老虎生态学的认识。本研究还讨论了对印度老虎进行遥测研究的挑战和问题。最后,作者在这些研究的基础上解决了了解老虎生态的空白,并概述了无线电遥测技术如何解决这些问题,以更好地了解和保护老虎。
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引用次数: 0
An iterative approach using Sawi transform for fractional telegraph equation in diversified dimensions 多维分数阶电报方程的Sawi变换迭代求解方法
IF 8.3 Q2 ENGINEERING, MECHANICAL Pub Date : 2023-01-01 DOI: 10.1515/nleng-2022-0285
Mamta Kapoor, Samanyu Khosla
Abstract In the present study, 1D, 2D, and 3D fractional hyperbolic telegraph equations in Caputo sense have been solved using an iterative method using Sawi transform. These equations serve as a model for signal analysis of electrical impulse transmission and propagation. Along with a table of Sawi transform of some popular functions, some helpful results on Sawi transform are provided. To demonstrate the effectiveness of the suggested method, five examples in 1D, one example in 2D, and one example in 3D are solved using the proposed scheme. Error analysis comparing approximate and exact solutions using graphs and tables has been provided. The proposed scheme is robust, effective, and easy to implement and can be implemented on variety of fractional partial differential equations to obtain precise series approximations.
摘要本文利用Sawi变换的迭代方法求解了Caputo意义下的一维、二维和三维分数双曲型电报方程。这些方程可作为电脉冲传输和传播的信号分析模型。并给出了一些常用函数的Sawi变换表,给出了一些关于Sawi变换的有用结果。为了验证该方法的有效性,使用该方案求解了5个一维算例、1个二维算例和1个三维算例。给出了用图形和表格比较近似解和精确解的误差分析。该方法鲁棒、有效、易于实现,可对多种分数阶偏微分方程实现精确的级数逼近。
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引用次数: 0
Novel soliton structures of truncated M-fractional (4+1)-dim Fokas wave model 截断m -分数(4+1)-暗Fokas波模型的新孤子结构
IF 8.3 Q2 ENGINEERING, MECHANICAL Pub Date : 2023-01-01 DOI: 10.1515/nleng-2022-0292
T. Rasool, R. Hussain, H. Rezazadeh, Asghar Ali, Ulviye Demirbilek
Abstract In this research article, a nonlinear time–space fractional order (4+1)-dim Fokas wave equation that is crucial for examining the corporal marvels of waves on and inside the surface of water is examined. For this purpose, a well-known analytical method is utilized, namely, the Sardar sub-equation (SSE) method along with a truncated M-fractional derivative. As a result, many new families of solitary wave solutions, such as kink-type solitons, singular and periodic solitons, dark and bright solitons, are established. By using the SSE method, the outcomes are portrayed in 3-dim, 2-dim, and contour plots for distinct parametric values. The attained hyperbolic and trigonometric function-type results demonstrate the capability of recognizing the exact solutions of the other nonlinear evolution equations through the executed technique.
本文研究了一个非线性时-空分数阶(4+1)-dim Fokas波动方程,该方程对于研究水面上和水面内波浪的物理特性至关重要。为此,使用了一种众所周知的分析方法,即Sardar子方程(SSE)方法以及截断的m分数阶导数。因此,建立了许多新的孤立波解族,如扭结型孤子、奇异孤子和周期孤子、暗孤子和亮孤子。通过使用SSE方法,结果在3-dim, 2-dim和轮廓图中描绘不同的参数值。所获得的双曲函数和三角函数型结果表明,通过执行的技术可以识别其他非线性发展方程的精确解。
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引用次数: 1
Exhaustive study on post effect processing of 3D image based on nonlinear digital watermarking algorithm 详细研究了基于非线性数字水印算法的三维图像后期效果处理
IF 8.3 Q2 ENGINEERING, MECHANICAL Pub Date : 2023-01-01 DOI: 10.1515/nleng-2022-0288
Chunhua Wang
Abstract In this work, an exhaustive study on post effect processing of three-dimensional (3D) image is carried to solve the problem of nonlinear digital watermarking algorithm. First, through the feature space decomposition method of the host image, the embedded watermark is constructed with the full row or column rank of the matrix, and then the public key is constructed by using the existence of the unitary matrix of the full row rank and column rank matrix, so that the algorithm can embed and extract the watermark in an asymmetric way. Watermark extraction correlation coefficient (ρ) value is 1. When the deformation amplitude of the model is slight and the noise intensity is σ = 0.0001, the watermark can be extracted successfully, and the watermark extraction correlation coefficient (ρ) is 0.92. In addition, the security of the algorithm is analyzed from many angles, the theoretical analysis is given, and verified by the experimental results. The proposed 3D watermarking methods are used to examine the information capacity of various 3D meshes. The 3D watermarking methods’ resistance to noise perturbation and object cropping is also investigated.
为了解决非线性数字水印算法的问题,本文对三维图像的后期效果处理进行了详尽的研究。首先,通过对宿主图像的特征空间分解方法,利用矩阵的满行秩或满列秩构造嵌入水印,然后利用满行秩和列秩矩阵的酉矩阵的存在性构造公钥,使算法能够以非对称方式嵌入和提取水印。水印提取相关系数(ρ)值为1。当模型变形幅度较小,噪声强度σ = 0.0001时,水印提取成功,水印提取相关系数(ρ)为0.92。此外,从多个角度对算法的安全性进行了分析,给出了理论分析,并通过实验结果进行了验证。提出的三维水印方法用于检测各种三维网格的信息容量。研究了三维水印方法对噪声扰动和目标裁剪的抵抗能力。
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引用次数: 2
Multiwireless sensors for electrical measurement based on nonlinear improved data fusion algorithm 基于非线性改进数据融合算法的多无线电测量传感器
IF 8.3 Q2 ENGINEERING, MECHANICAL Pub Date : 2023-01-01 DOI: 10.1515/nleng-2022-0238
Jian Luo
Abstract In order to improve the accuracy of collected data and avoid table lookup, the adaptive weighted fusion algorithm is improved. According to the characteristics of the median and the mean value in the normal distribution, a new method of preprocessing to remove outliers is proposed to improve the accuracy of the final fusion result. The algorithm is used to calculate the temperature data to be processed in a greenhouse. The results showed that the fusion result after average processing was X ˆ hat{X} = 15.77°C. The standard deviation is σ sigma = 0.1194°C. After the treatment of the Grabbs criterion, the fusion result is X ˆ hat{X} = 15.73°C and the standard deviation is σ sigma = 0.1110°C. The fusion result of the improved algorithm is X ˆ hat{X} = 15.74°C. The standard deviation is σ sigma = 0.0959°C. Advantages of various preprocessing algorithms: improved algorithm > Grubbs method > no preprocessing. From the processing results of group A1 data, it can be seen that the improved algorithm can effectively suppress the ipsilateral shielding effect. Compared with the traditional Grubbs method to eliminate outliers and other algorithms, the improved algorithm can make the standard deviation of the fusion result smaller, and the fusion result can better represent the overall distribution, and there is no need to look up the table.
摘要为了提高采集数据的准确性和避免查找表,对自适应加权融合算法进行了改进。根据正态分布中值和平均值的特点,提出了一种去除异常值的预处理方法,以提高最终融合结果的准确性。该算法用于计算温室中待处理的温度数据。结果表明,平均处理后的熔合结果为X°hat{X} = 15.77°C。标准差为σ sigma = 0.1194℃。经Grabbs准则处理后,融合结果为X°hat{X} = 15.73℃,标准差为σ sigma = 0.1110℃。改进算法的融合结果为X´hat{X} = 15.74°C。标准差为σ sigma = 0.0959℃。各种预处理算法的优点:改进算法> Grubbs方法>无需预处理。从A1组数据的处理结果可以看出,改进算法可以有效地抑制同侧屏蔽效应。与传统的Grubbs法消除离群值等算法相比,改进算法使融合结果的标准差更小,融合结果更能代表整体分布,无需查表。
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引用次数: 0
Numerical analysis of vibration response of elastic tube bundle of heat exchanger based on fluid structure coupling analysis 基于流固耦合分析的换热器弹性管束振动响应数值分析
IF 8.3 Q2 ENGINEERING, MECHANICAL Pub Date : 2023-01-01 DOI: 10.1515/nleng-2022-0270
W. Su, Kerui Tao, Fansheng Liu
Abstract A tube bundle heat exchanger is a typical heat exchange equipment that exchanges heat between two fluids with different temperatures. Through this equipment, one fluid can be cooled down and another fluid can be heated up to meet their respective needs. The equipment is widely used in chemical, petroleum, pharmaceutical, energy, and other industrial sectors, and is one of the indispensable and important equipments in chemical production. To improve the heat transfer performance and service life of the heat exchanger, a numerical analysis of the vibration response of the elastic tube bundle in the heat exchanger based on fluid–structure coupling analysis is proposed. Using the weak coupling method of fluid–structure coupling, the vibration response of multiple rows of elastic tube bundles induced by shell side fluid in a heat exchanger with different tube row spacing and different tube row numbers is studied numerically, and the effects of shell side fluid and tube side fluid on the vibration response of elastic tube bundles are compared and analyzed. The results show that the maximum relative error of monitoring point amplitude is 43.36% when H = 40 mm and 10.17% when H = 70 mm. For connection IV, the maximum relative error of monitoring point amplitude is 31.71% when H = 40 mm and 24.08% when H = 70 mm. This is because when H is small, the interaction between rows of tube bundles is strong, so the amplitude changes violently with the number of the tube bundle. The step-by-step calculation strategy of rough calculation and actuarial calculation proposed in this article can greatly reduce the calculation time and improve the calculation efficiency.
摘要管束式换热器是在两种温度不同的流体之间进行热量交换的典型换热设备。通过该设备,一种流体可以冷却,另一种流体可以加热,以满足各自的需求。该设备广泛应用于化工、石油、制药、能源等工业部门,是化工生产中不可缺少的重要设备之一。为了提高换热器的传热性能和使用寿命,提出了一种基于流固耦合分析的换热器弹性管束振动响应数值分析方法。采用流固耦合的弱耦合方法,数值研究了不同管排间距和不同管排数换热器中壳侧流体对多排弹性管束的振动响应,比较分析了壳侧流体和管侧流体对弹性管束振动响应的影响。结果表明:当H = 40 mm时,测点振幅的最大相对误差为43.36%,当H = 70 mm时,测点振幅的最大相对误差为10.17%;对于接头IV, H = 40 mm时监测点振幅的最大相对误差为31.71%,H = 70 mm时为24.08%。这是因为当H较小时,管束排之间的相互作用较强,因此振幅随管束数的增加而剧烈变化。本文提出的粗算和精算分步计算策略,可以大大减少计算时间,提高计算效率。
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引用次数: 0
Deformable Laplace transform and its applications 可变形拉普拉斯变换及其应用
IF 8.3 Q2 ENGINEERING, MECHANICAL Pub Date : 2023-01-01 DOI: 10.1515/nleng-2022-0278
Priyanka Ahuja, A. Ujlayan, Dinkar Sharma, Hari Pratap
Abstract Recently, the deformable derivative and its properties have been introduced. In this work, we have investigated the concept of deformable Laplace transform (DLT) in more detail. Furthermore, some classical properties of the DLT are also included. The Heaviside expansion formula and convolution theorem for deformable inverse Laplace transform are also discussed. Furthermore, some illustrative numerical examples are also discussed to validate the applicability of the proposed DLT and finally conclude the theory.
摘要近年来,对可变形导数及其性质进行了介绍。在这项工作中,我们更详细地研究了可变形拉普拉斯变换(DLT)的概念。此外,还包括了DLT的一些经典特性。讨论了可变形拉普拉斯逆变换的Heaviside展开公式和卷积定理。此外,还讨论了一些说明性的数值例子来验证所提出的DLT的适用性,并最终总结了该理论。
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引用次数: 0
期刊
Nonlinear Engineering - Modeling and Application
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