PRECESION： progressive recovery and restoration planning of interdependent services in enterprise data centers

The primary focus of this paper is to design a progressive restoration plan for an enterprise data center environment following a partial or full disruption. Repairing and restoring disrupted components in an enterprise data center requires a significant amount of time and human effort. Following a major disruption, the recovery process involves multiple stages, and during each stage, the partially recovered infrastructures can provide limited services to users at some degraded service level. However, how fast and efficiently an enterprise infrastructure can be recovered de- pends on how the recovery mechanism restores the disrupted components, considering the inter-dependencies between services, along with the limitations of expert human operators. The entire problem turns out to be NP- hard and rather complex, and we devise an efficient meta-heuristic to solve the problem. By considering some real-world examples, we show that the proposed meta-heuristic provides very accurate results, and still runs 600-2800 times faster than the optimal solution obtained from a general purpose mathematical solver [1].

Research on numerical simulation of the groundwater funnels restoration in Shijiazhuang

In order to simulate the recovery of groundwater funnels under the condition of reducing groundwater abstraction, hydrogeological conditions of recoverability construction of Shijiazhuang groundwater funnel were analyzed, and a numerical simulation method was used based on the change of various parameters. The results show that the groundwater flow model can accurately reflect groundwater hydrogeological characteristics, and can guarantee the reliability of groundwater restoration prediction. The research has set up four schemes for rural water-saving, planting structure adjustment, urban reducing abstraction and integrated method. The effect of four restoration schemes on the restoration of groundwater funnels was compared with water table variations of two observation well. Comparison results show that the level changes of plan Three and Four are different from the other two kinds of exploitation and the drop trend of water table in the funnel area is flat. So we can conclude that Plan Three and Four have significant effect on the groundwater funnel restoration of Shijiazhuang.

矿区生态环境调研评估与修复方案研究

以某矿区为例,对矿区水文环境、工程地质、基本设施等生态环境进行调研分析,结合调研结果预估矿山地质环境影响,分析矿区采矿活动对各类矿区地质环境因素所造成的影响。根据地质环境影响预测评估结果,实施矿区地质环境治理分区,介绍工程生态环境修复方案设计,为后续矿区生态环境修复方案设计,提供调研评估方法与修复设计方案参考。

边坡生态修复策略及方案设计研究

为了研究岩质边坡生态修复的策略及方案设计,文章结合工程实例,通过分析某边坡的现状及生态修复需求,着重研究边坡生态修复的作用机理,包括力学和水文效应,针对不同坡度,提出了边坡保护技术设计、灌排水设计、管道布局设计、植被评估与选择以及植后管理措施,旨在提高岩质边坡生态稳定性和恢复生态系统功能,并进行了生态修复适应性分析,为类似地区的边坡生态修复提供了可行的参考方案。

生态修复技术在高陡松散岩质边坡复绿中的应用

以东北地区高陡边坡为例,对生态修复技术在高陡松散岩质边坡复绿中的应用进行了探究,从边坡稳定理论、生态恢复理论、土壤和水文控制理论、生态系统服务理论4方面进行理论分析,详细阐述坡面固化技术和植物栽种技术,并对生态修复技术的应用效果进行了分析。

铅锌矿生态环境的评价与修复方案探讨

该文以铅锌矿生态环境的评价与修复方案为研究对象,通过研究铅锌矿开采对生态环境的影响,评价了铅锌矿区生态环境的现状。根据评价结果,提出了一系列的修复方案。通过对水体修复、土壤修复和植被修复方案的分析,认为水体修复和土壤修复成本高,周期长但治理效果好,可恢复水体和土壤的自净能力,而植被恢复需要气候环境等条件相适宜,方案实施条件相对苛刻。综上所述,文章通过对铅锌矿生态环境的评价与修复方案的探讨,为铅锌矿区的生态环境修复提供了参考和指导。希望这些研究成果能够对相关领域的科学研究和实践工作有所启示。

RS-SVM Machine Learning Approach Driven by Case Data for Selecting Urban Drainage Network Restoration Scheme

Urban drainage pipe network is the backbone of urban drainage,flood control and water pollution prevention,and is also an essential symbol to measure the level of urban modernization.A large number of underground drainage pipe networks in aged urban areas have been laid for a long time and have reached or practically reached the service age.The repair of drainage pipe networks has attracted extensive attention from all walks of life.Since the Ministry of ecological environment and the national development and Reform Commission jointly issued the action plan for the Yangtze River Protection and restoration in 2019,various provinces in the Yangtze River Basin,such as Anhui,Jiangxi and Hunan,have extensively carried out PPp projects for urban pipeline restoration,in order to improve the quality and efficiency of sewage treatment.Based on the management practice of urban pipe network restoration project in Wuhu City,Anhui Province,this paper analyzes the problems of lengthy construction period and repeated operation caused by the mismatch between the design schedule of the restoration scheme and the construction schedule of the pipe network restoration in the existing project management mode,and proposes a model of urban drainage pipe network restoration scheme selection based on the improved support vector machine.The validity and feasibility of the model are analyzed and verified by collecting the data in the project practice.The research results show that the model has a favorable effect on the selection of urban drainage pipeline restoration schemes,and its accuracy can reach 90%.The research results can provide method guidance and technical support for the rapid decision-making of urban drainage pipeline restoration projects.

煤矸石堆放场综合治理工程技术方案研究与应用

煤矸石堆放场综合治理的根本目的是解决矸石堆放对区域水体、土壤、自然环境等带来的污染问题,达到项目的社会效益、环境效益和经济效益,保证当地经济的健康和可持续发展。针对陕煤蒲白矿区白水煤矿矸石堆放场堆积污染现状,经过就地封场与异地填埋综合治理方案综合比较,决定采用矸石场就地封场工艺技术方案。在此基础上,结合实际情况,进行合理、行之有效的方案设计,并采用相应的技术措施,对矸石堆体进行整形,对堆体气体进行有效疏导,建立库区雨水导排系统、封库覆盖系统,恢复植被,提高景观质量,使其与周围环境和谐统一,实现生态修复目标。

Multiquadric Radial Basis Function Approximation Scheme for Solution of Total Variation Based Multiplicative Noise Removal Model

This article introduces a fastmeshless algorithm for the numerical solution nonlinear partial differential equations(PDE)by Radial Basis Functions(RBFs)approximation connected with the Total Variation(TV)-basedminimization functional and to show its application to image denoising containing multiplicative noise.These capabilities used within the proposed algorithm have not only the quality of image denoising,edge preservation but also the property of minimization of staircase effect which results in blocky effects in the images.It is worth mentioning that the recommended method can be easily employed for nonlinear problems due to the lack of dependence on a mesh or integration procedure.The numerical investigations and corresponding examples prove the effectiveness of the recommended algorithm regarding the robustness and visual improvement as well as peak-signal-to-noise ratio(PSNR),signal-to-noise ratio(SNR),and structural similarity index(SSIM)corresponded to the current conventional TV-based schemes.

四川大学图书馆藏三册清人手迹文献的修复

文章以四川大学图书馆特藏文献清人手迹三册修复实施过程为例,针对在修复前、中、后期遇到的困难,应该注意的问题,结合修复中的实际情况,探讨此类文献的修复方法与保护措施,最后对修复过程中的重点和难点进行了梳理和总结,希望能给手迹类文献的修复提供一些参考。

碳中和战略下林业碳汇引入生态修复司法之效能探究

2022年以来,部分法院接力推动林业碳汇引入生态修复司法的进程,并最终得到司法解释的认可,形成了林业碳汇替代性赔偿方案。林业碳汇交易系实现碳达峰、碳中和的重要路径,生态环境司法也提出要服务碳达峰、碳中和的实现。在此背景下,分析该方案的实践样态,探查林业碳汇引入生态修复司法的现实需求、原有制度的缺陷以及引入基础,揭示林业碳汇替代性赔偿方案的潜在效能,特别是其对碳达峰、碳中和战略的重要意义,从而尝试给出加速林业碳汇法律化进程,明确林业碳汇替代性赔偿方案的属性及实用领域等针对性优化建议。

武都闸坝水毁成因分析及修复方案研究

闸坝的水毁直接影响到工程的安全运行,该文对武都闸坝的水毁情况进行描述,对水毁的原因进行分析,并提出相应的闸坝及护坦的修复处理措施和工程设计,研究成果对本工程的修复设计与施工以及类似工程的修复设计均具有参考价值。

Cloud-Data Envelopment Analysis Method Used for Assessment of Restoration Building Block Schemes

The selection of an optimized restoration building block(RBB)scheme among all available schemes is one of the most important factors impacting the power system restoration process after a complete or partial blackout.This paper presents a data envelopment analysis(DEA)model used as an empirical method to assess the RBB schemes.An N-level evaluation scale cloud system is built based on cloud theory to transform qualitative I/O indices of DEA model into quantitative values.Through joint utilization of the CCR(Charnes,Cooper and Rhodes)model and the LJK(Li,Jahanshahloo and Khodabakhshi)model,the established Joint-DEA model makes the newly proposed Cloud-DEA method a more feasible and robust method in assessment of RBB schemes.

电力系统黑启动的研究

研究电力系统黑启动的过程及恢复中存在的自励磁。过电压、频率和志压稳定、组织措施及女排等问题，并通过华东系统黑启动仿真对上述问题进行分析和解决，证明制定严格的黑启动计划不仅可以迅速恢复系统、降低事故损失。

分层分区的馈线自动化配置方案研究

针对配电网特点,采取分层分区的馈线自动化配置方案,提高馈线自动化的实用性。将馈线自动化自下而上分为馈线层、馈线岛层和系统层三个层次。在馈线层和馈线岛层上,根据区域的不同特点提出不同的馈线自动化方案。在单电源线路上,采用简单可靠的无通信就地式FA。在馈线分支线的故障隔离上,提出了出线开关两次重合与支线负荷开关故障过流断开相结合的方法。还提出了一种基于故障信号数量求和的智能分布式FA方法。该方法简便直观,联络开关与分段开关判断逻辑可自动切换,能灵活适应运行方式的调整。在系统层的FA方面,通过网络拓扑与优化运行,在主网故障造成大范围停电时通过配电线路转供电来提高供电可靠性,并具有优化网络运行方式,减少停电的作用。

电力系统扩展黑启动方案的研究

电力系统全停电后的黑启动恢复问题是系统安全防御的重要课题,科学合理的黑启动方案对于实现系统全停后的快速恢复具有重要意义。鉴于目前有些系统的黑启动电源有较大容量及较好的运行调节性能,提出一个黑启动电源同时启动多个被启动电厂的扩展黑启动策略。以黑启动形成的系统在一个时间段内机组发电量的加权和最大为优化目标,综合考虑被启动机组的启动约束及系统的运行约束,建立扩展黑启动方案优化模型,并将此优化问题转化为一个二维背包问题,结合最短路径法与回溯算法对扩展黑启动方案进行优化。最后,以新英格兰10机39节点系统和河北南网实际系统为算例验证所提方法的有效性。

大沽河下游地区地下咸水恢复方案的数值分析

本文首先分析了咸水分布区的自然地理条件和水文地质条件 ,然后对研究区的水文地质条件进行了概化 ,建立了相应的地下水质数值模型 ,最后通过地下水模拟软件Visual MODFLOW 3 1对不同的治理方案进行了数值分析。研究结果表明 ,单一的抽水方案对于高浓度咸水的去除非常有效 ,但是低浓度咸水残留量较大 ;而抽水优化方案不但能够同时去除高浓度和低浓度的咸水 ,并且更加彻底和快速。

计算机辅助牙齿隐形正畸系统

针对牙齿隐形正畸术依赖于预先排齐错位牙齿的需求,提出了包括牙齿形状建模以及虚拟矫治2个部分的完整的计算机辅助牙齿隐形正畸系统.该系统的输入是由光学扫描获得的牙颌数字模型,输出用于快速成型加工的中间母模模型,主要包括牙齿分割、牙齿修复、牙齿运动设计、牙龈变形、矫治方案制定以及虚拟咬合等环节.基于牙颌模型的几何特征,采用两步牙齿模型分割方法:首先确定分割区域,进而利用控制曲线裁切获得光滑边界;对于相邻牙齿之间的缺失区域,利用控制曲线网指定曲面位置约束,并利用微分坐标方法重建;采用移动最小二乘插值解决牙龈变形中由于求解大规模线性系统而导致的消耗内存过多问题.该系统是生产隐形矫治器的关键步骤,同时也为医生诊断病情提供了可视化虚拟环境.近50例临床试验结果表明,该系统能够有效地进行牙齿矫治,并正在进行产业化.

废弃矿山植被恢复技术方案设计初探

通过对江苏宜兴林场废弃矿山地质环境的调查,分析了其生态环境破坏现状,初步探讨了该矿山环境治理设计方案,主要包括设计原则、设计方案及植被恢复后期的管理,以期对宜兴废弃矿山的植被恢复提供理论指导。

用于配电网规划的改进遗传算法

针对传统遗传算法易于陷入局部最优解和随着配电网规模的扩大搜索效率降低的问题,借鉴协同进化思想提出了基于协同遗传算法的配电网规划算法。通过对目标函数进行处理引入了多个物种,并采用简单遗传算法和考虑进化稳定的改进多种群遗传算法分别对不同的物种进行操作,通过转移优秀个体实现了物种间的协同作用。同时为解决遗传算法应用于配电网规划时产生的大量不可行解的问题,借助图论知识和搜索技术给出了不可行解的修复方案,通过对孤岛、孤链和环进行修复,将非辐射状网络修复为辐射状网络。算例结果验证了该算法的实用性和有效性。