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A novel power system reconfiguration for a distribution system with minimum load balancing index using

K. Sathish KUMAR, T. JAYABARATHI

《能源前沿（英文）》 2012年 第6卷 第3期   页码 260-265 doi: 10.1007/s11708-012-0196-8

摘要： In this paper, the objective of minimum load balancing index (LBI) for the 16-bus distribution system is achieved using bacterial foraging optimization algorithm (BFOA). The feeder reconfiguration problem is formulated as a non-linear optimization problem and the optimal solution is obtained using BFOA. With the proposed reconfiguration method, the radial structure of the distribution system is retained and the burden on the optimization technique is reduced. Test results are presented for the 16-bus sample network, the proposed reconfiguration method has effectively decreased the LBI, and the BFOA technique is efficient in searching for the optimal solution.

关键词： bacterial foraging optimization algorithm (BFOA)     distribution system     network reconfiguration     load balancing index (LBI)     radial network    

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Erratum to: MDLB: a metadata dynamic load balancing mechanism based on reinforcement learning

Zhao-qi Wu, Jin Wei, Fan Zhang, Wei Guo, Guang-wei Xie,17034203@qq.com

《信息与电子工程前沿（英文）》 2020年 第21卷 第9期   页码 1412-1412 doi: 10.1631/FITEE.19e0121

摘要： Unfortunately the corresponding author’s ORCID was incorrect. It should be: Fan ZHANG, https://orcid.org/0000-0001-7456-8377.
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Comparison of optimal capacitor placement methods in radial distribution system with load growth andZIP load model

Veera Venkata Satya Naryana MURTY, Ashwani KUMAR

《能源前沿（英文）》 2013年 第7卷 第2期   页码 197-213 doi: 10.1007/s11708-013-0249-7

摘要： In this paper, a combined power loss sensitivity (PLS) index-based approach is proposed to determine the optimal location of the capacitors in the radial distribution system (RDS) based on the real and reactive combined loss sensitivity index, as capacitor placement not only reduces real power loss with voltage profile improvement but also reduces reactive power loss due to the reactive power compensation in the network. The results have been obtained with the existing methods of power loss index (PLI) and index vector (IV) method for comparison. Besides, the optimal placement has been obtained with the proposed method as well as existing methods and the total kVar support has been obtained. In addition, the results of net cost savings for the 10-, 34-, and 69-bus systems are obtained for comparison. Moreover, the results have been obtained for a large system of 85 buses to validate the results with combined sensitivity based approach. Furthermore, the load growth factor has been considered in the study which is essential for the planning and expansion of the existing systems, whereas the impact of the realistic load model as ZIP load model has been considered for the study of all the systems.

关键词： load growth     load models     reactive power compensation     radial distribution system     power loss index (PLI)     power loss sensitivity (PLS)     index vector (IV)    

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负载均衡的分布式指纹识别系统 Article

Yun-xiang ZHAO,Wan-xin ZHANG,Dong-sheng LI,Zhen HUANG,Min-ne LI,Xi-cheng LU

《信息与电子工程前沿（英文）》 2016年 第17卷 第8期   页码 766-780 doi: 10.1631/FITEE.1500487

摘要： 指纹的唯一性和不变性使得它在各类生物识别系统中得到了广泛的应用。随着指纹识别技术的发展，大规模的指纹存储和系统高并发的需求给指纹识别系统带来了新的挑战。面对这种挑战，我们设计并实现了一个负载均衡的分布式指纹识别系统，它包括分布式指纹特征提取子系统和分布式指纹特征存储子系统两部分。在指纹特征提取的过程中，特征提取与Hadoop图片处理接口（HIPI）的结合使得特征提取的效率得到大幅度提升；特征存储子系统对MongoDB默认的负载均衡策略进行了优化，使得鲁棒性得到了明显提高。相关的试验和模拟表明，相比于Hadoop默认的小文件处理机制，我们的系统可以在指纹特征提取的过程中减少约70%的处理时间；优化后的MongoDB负载均衡策略可以将分布式MongoDB系统的前端mongos负载差距控制在5%以下，基于操作负载（增、删、改、查）的后端数据存储负载均衡策略将由数据迁移带来的时间开销降低了约40%。

关键词： 分布式指纹识别系统；分布式MongoDB；负载均衡    

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Static balancing of planar articulated robots

Giuseppe QUAGLIA,Zhe YIN

《机械工程前沿（英文）》 2015年 第10卷 第4期   页码 326-343 doi: 10.1007/s11465-015-0355-9

摘要：

Static balancing for a manipulator’s weight is necessary in terms of energy saving and performance improvement. This paper proposes a method to design balancing devices for articulated robots in industry, based on robotic dynamics. Full design details for the balancing system using springs are presented from two aspects: One is the optimization for the position of the balancing system; the other is the design of the spring parameters. As examples, two feasible balancing devices are proposed, based on different robotic structures: The first solution consists of linkages and springs; the other consists of pulleys, cross mechanisms and (hydro-) pneumatic springs. Then the two solutions are compared. Pneumatic, hydro-pneumatic and mechanical springs are discussed and their parameters are decided according to the requirements of torque compensation. Numerical results show that with the proper design using the methodology presented in this paper, an articulated robot can be statically balanced perfectly in all configurations. This paper therefore provides a design method of the balancing system for other similar structures.

关键词： robotics     static balancing     pneumatic spring     mechanical spring     torque compensation    

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Reactive power deployment and cost benefit analysis in DNO operated distribution electricity markets with D-STATCOM

Atma Ram GUPTA,Ashwani KUMAR

《能源前沿（英文）》 2019年 第13卷 第1期   页码 86-98 doi: 10.1007/s11708-017-0456-8

摘要： The aim of this paper is to analyze unbalanced radial distribution systems (UBRDS) with the distribution static compensator (D-STATCOM). The main objectives of this paper are D-STATCOM allocation in UBRDS with an objective of providing reactive power support to enhance voltage profile and reduce line losses of the distribution network, determination of optimal D-STATCOM rating subjected to minimization of total cost, and impact of D-STATCOM placement on improving power factor and savings in cost of energy loss. The analysis is conducted on a large industrial load model with light, medium and high loading scenarios. Further, the impact of load growth is also considered for better planning of the power distribution system. The results are obtained on standard 25-bus UBRDS to check the feasibility of the proposed methodology.

关键词： unbalanced distribution system     D-STATCOM     voltage sensitivity index     load models     load growth     distribution network operator (DNO)    

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Shaking-moment balancing of mechanisms with principal vectors and momentum

V. van der WIJK

《机械工程前沿（英文）》 2013年 第8卷 第1期   页码 10-16 doi: 10.1007/s11465-013-0359-2

摘要：

The design of shaking-moment-balanced linkages still is challenging. Considering moment balance in the very beginning of the design process of mechanisms is important for finding applicable solutions. For this purpose, the method of principal vectors is investigated, showing a compact notation of the angular momentum with respect to the center of mass. The moment balance conditions are derived for three elements in series from which balance solutions are synthesized and illustrated. From the application for moment balancing of a 4R four-bar linkage it is shown that the moment balancing of closed kinematic chains remains challenging.

关键词： shaking-moment balancing     principal vector linkage     angular momentum    

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Pareto lexicographic α-robust approach and its application in robust multi objective assembly line balancing

null

《机械工程前沿（英文）》 2014年 第9卷 第3期   页码 257-264 doi: 10.1007/s11465-014-0294-x

摘要：

Robustness in most of the literature is associated with min-max or min-max regret criteria. However, these criteria of robustness are conservative and therefore recently new criteria called, lexicographic α-robust method has been introduced in literature which defines the robust solution as a set of solutions whose quality or jth largest cost is not worse than the best possible jth largest cost in all scenarios. These criteria might be significant for robust optimization of single objective optimization problems. However, in real optimization problems, two or more than two conflicting objectives are desired to optimize concurrently and solution of multi objective optimization problems exists in the form of a set of solutions called Pareto solutions and from these solutions it might be difficult to decide which Pareto solution can satisfy min-max, min-max regret or lexicographic α-robust criteria by considering multiple objectives simultaneously. Therefore, lexicographic α-robust method which is a recently introduced method in literature is extended in the current research for Pareto solutions. The proposed method called Pareto lexicographic α-robust approach can define Pareto lexicographic α-robust solutions from different scenarios by considering multiple objectives simultaneously. A simple example and an application of the proposed method on a simple problem of multi objective optimization of simple assembly line balancing problem with task time uncertainty is presented to get their robust solutions. The presented method can be significant to implement on different multi objective robust optimization problems containing uncertainty.

关键词： Pareto     lexicographic α-robust     assembly line balancing    

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The MYC transcription factor network: balancing metabolism, proliferation and oncogenesis

null

《医学前沿（英文）》 2018年 第12卷 第4期   页码 412-425 doi: 10.1007/s11684-018-0650-z

摘要：

Transcription factor networks have evolved in order to control, coordinate, and separate, the functions of distinct network modules spatially and temporally. In this review we focus on the MYC network (also known as the MAX-MLX Network), a highly conserved super-family of related basic-helix-loop-helix-zipper (bHLHZ) proteins that functions to integrate extracellular and intracellular signals and modulate global gene expression. Importantly the MYC network has been shown to be deeply involved in a broad spectrum of human and other animal cancers. Here we summarize molecular and biological properties of the network modules with emphasis on functional interactions among network members. We suggest that these network interactions serve to modulate growth and metabolism at the transcriptional level in order to balance nutrient demand with supply, to maintain growth homeostasis, and to influence cell fate. Moreover, oncogenic activation of MYC and/or loss of a MYC antagonist, results in an imbalance in the activity of the network as a whole, leading to tumor initiation, progression and maintenance.

关键词： network     transcription     cancer     MYC     MAX     MLX    

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Anefficient data layout scheme for better I/O balancing inRAID-6 storage systems

Ping XIE,Jian-zhong HUANG,Er-wei DAI,Qiang CAO,Chang-sheng XIE

《信息与电子工程前沿（英文）》 2015年 第16卷 第5期   页码 335-345 doi: 10.1631/FITEE.1400362

摘要： Among redundant arrays of independent disks (RAID)-6 codes, maximum distance separable (MDS) based RAID-6 codes are popular because they have the optimal storage efficiency. Although vertical MDS codes exhibit better load balancing compared to horizontal MDS codes in partial stripes, an I/O unbalancing problem still exists in some vertical codes. To address this issue, we propose a novel efficient data layout, uniform P-code (UPC), to support highly balanced I/Os among P-coded disk arrays (i.e., PC). In UPC, the nonuniformly distributed information symbols in each parity chain of P-code are moved along their columns to other rows, thus enabling the parity chain to keep original parity relationships and tolerate double disk failures. The UPC scheme not only achieves optimal storage efficiency, computational complexity, and update complexity, but also supports better I/O balancing in the context of large-scale storage systems. We also conduct a performance study on reconstruction algorithms using an analytical model. Besides extensive theoretical analysis, comparative performance experiments are conducted by replaying real-world workloads under various configurations. Experimental results illustrate that our UPC scheme significantly outperforms the PC scheme in terms of average user response time. In particular, in the case of a 12-disk array, the UPC scheme can improve the access performance of the RAID-6 storage system by 29.9% compared to the PC scheme.

关键词： RAID-6     Data availability     High performance     I/O balancing    

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Balancing resilience and efficiency in supply chains: Roles of disruptive technologies under Industry

《工程管理前沿（英文）》   页码 171-176 doi: 10.1007/s42524-022-0247-8

摘要： In the Industry 4.0 era, disruptive technologies such as big data analytics, blockchain, Internet-of-Things, and additive manufacturing have become major forces driving supply chain transformation. Under such circumstances, particular attention should be attached to balancing resilience and efficiency of the supply chain, especially in the presence of more turbulence. In this study, we first summarize the conflicts between supply chain efficiency and supply chain resilience regarding practices and objectives. Then, we discuss the positive effects of disruptive technologies in improving resilience and efficiency. Afterwards, we propose a research agenda that covers both the influence mechanism and trade-off mechanism of these technologies in terms of resilience and efficiency.

关键词： disruptive technologies     supply chain     resilience     efficiency     paradox     balance    

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MDLB：一种基于强化学习的元数据动态负载均衡机制 Research Articles

武兆琪1,卫今2,3,张帆1,郭威1,谢光伟2,3

《信息与电子工程前沿（英文）》 2020年 第21卷 第7期   页码 963-1118 doi: 10.1631/FITEE.1900121

摘要： 随着信息和数据量增长，面向对象的存储系统已被广泛应用到很多领域，包括Google文件系统、AmazonS3、Hadoop分布式文件系统和Ceph。其中元数据负载均衡在提高整个系统输入/输出性能方面起着重要作用，元数据负载不平衡会导致服务器出现严重的系统性能瓶颈问题。然而现有元数据负载平衡策略缺乏良好动态性和适用性，如基于子树分割或者哈希的负载策略。提出一种基于强化学习的动态负载平衡机制（MDLB）。采用Q_learning算法，所提基于强化学习机制由3个模块组成，即策略选择网络、负载均衡网络和参数更新网络。实验结果表明MDLB算法可根据元数据服务器的性能动态调节负载，在数据量骤变情况下仍具有很好适应性。

关键词： 面向对象的存储系统；元数据；动态负载均衡；强化学习；Q_learning    

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An improved artificial bee colony algorithm with MaxTF heuristic rule for two-sided assembly line balancing

Xiaokun DUAN, Bo WU, Youmin HU, Jie LIU, Jing XIONG

《机械工程前沿（英文）》 2019年 第14卷 第2期   页码 241-253 doi: 10.1007/s11465-018-0518-6

摘要： Two-sided assembly line is usually used for the assembly of large products such as cars, buses, and trucks. With the development of technical progress, the assembly line needs to be reconfigured and the cycle time of the line should be optimized to satisfy the new assembly process. Two-sided assembly line balancing with the objective of minimizing the cycle time is called TALBP-2. This paper proposes an improved artificial bee colony (IABC) algorithm with the MaxTF heuristic rule. In the heuristic initialization process, the MaxTF rule defines a new task’s priority weight. On the basis of priority weight, the assignment of tasks is reasonable and the quality of an initial solution is high. In the IABC algorithm, two neighborhood strategies are embedded to balance the exploitation and exploration abilities of the algorithm. The employed bees and onlooker bees produce neighboring solutions in different promising regions to accelerate the convergence rate. Furthermore, a well-designed random strategy of scout bees is developed to escape local optima. The experimental results demonstrate that the proposed MaxTF rule performs better than other heuristic rules, as it can find the best solution for all the 10 test cases. A comparison of the IABC algorithm and other algorithms proves the effectiveness of the proposed IABC algorithm. The results also denote that the IABC algorithm is efficient and stable in minimizing the cycle time for the TALBP-2, and it can find 20 new best solutions among 25 large-sized problem cases.

关键词： two-sided assembly line balancing problem     artificial bee colony algorithm     heuristic rules     time boundary    

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Model reduction of contact dynamics simulation using a modified Lyapunov balancing method

Jianxun LIANG, Ou MA, Caishan LIU

《机械工程前沿（英文）》 2011年 第6卷 第4期   页码 383-391 doi: 10.1007/s11465-011-0244-9

摘要：

Finite element models are often used to simulate impact and contact dynamics responses of multibody dynamical systems. However, such a simulation remains very inefficient because very small integration time step must be used when solving the involved differential equations, especially when the involved contact stiffness is high. Although many model reduction techniques have been available to improve the efficiency of finite element based simulations, these techniques cannot be readily applied to contact dynamics simulations due to the high nonlinearity of the contact dynamics models. This paper presents a model reduction approach for finite-element based multibody contact dynamics simulation, based on a modified Lyapunov balanced truncation method. An example is presented to demonstrate that, by applying the model reduction the simulation process is significantly speeded up and the resulting error is bounded within an acceptable level. The performance of the method with respect to some influential factors such as element size, shape and contact stiffness is also investigated.

关键词： contact dynamics     dynamic simulation     model reduction     finite element method    

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高速主轴动平衡及其在线控制技术

章 云,梅雪松

《中国工程科学》 2013年 第15卷 第1期   页码 87-92

摘要：

针对机床主轴在线自动平衡控制问题，阐述了高速主轴不平衡识别方法和在线自动平衡技术国内外现状，分析了喷液式在线自动平衡装置原理，设计了喷液式平衡系统，并通过高速主轴实验对该系统的有效性进行了验证。研究结果表明，主轴经过平衡后，不平衡量振动值由1.60 mm/s降至0.34 mm/s，主轴失衡振动得到了有效抑制。

关键词： 高速主轴     在线动平衡     振动控制    

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标题 作者 时间 类型 操作

A novel power system reconfiguration for a distribution system with minimum load balancing index using

K. Sathish KUMAR, T. JAYABARATHI

期刊论文

Erratum to: MDLB: a metadata dynamic load balancing mechanism based on reinforcement learning

Zhao-qi Wu, Jin Wei, Fan Zhang, Wei Guo, Guang-wei Xie,17034203@qq.com

期刊论文

Comparison of optimal capacitor placement methods in radial distribution system with load growth andZIP load model

Veera Venkata Satya Naryana MURTY, Ashwani KUMAR

期刊论文

负载均衡的分布式指纹识别系统

Yun-xiang ZHAO,Wan-xin ZHANG,Dong-sheng LI,Zhen HUANG,Min-ne LI,Xi-cheng LU

期刊论文

Static balancing of planar articulated robots

Giuseppe QUAGLIA,Zhe YIN

期刊论文

Reactive power deployment and cost benefit analysis in DNO operated distribution electricity markets with D-STATCOM

Atma Ram GUPTA,Ashwani KUMAR

期刊论文

Shaking-moment balancing of mechanisms with principal vectors and momentum

V. van der WIJK

期刊论文

Pareto lexicographic α-robust approach and its application in robust multi objective assembly line balancing

null

期刊论文

The MYC transcription factor network: balancing metabolism, proliferation and oncogenesis

null

期刊论文

Anefficient data layout scheme for better I/O balancing inRAID-6 storage systems

Ping XIE,Jian-zhong HUANG,Er-wei DAI,Qiang CAO,Chang-sheng XIE

期刊论文

Balancing resilience and efficiency in supply chains: Roles of disruptive technologies under Industry

期刊论文

MDLB：一种基于强化学习的元数据动态负载均衡机制

武兆琪1,卫今2,3,张帆1,郭威1,谢光伟2,3

期刊论文

An improved artificial bee colony algorithm with MaxTF heuristic rule for two-sided assembly line balancing

Xiaokun DUAN, Bo WU, Youmin HU, Jie LIU, Jing XIONG

期刊论文

Model reduction of contact dynamics simulation using a modified Lyapunov balancing method

Jianxun LIANG, Ou MA, Caishan LIU

期刊论文

高速主轴动平衡及其在线控制技术

章 云,梅雪松

期刊论文