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Unveiling priority control toxic metal in cover soil of anti-seepage tailings ponds: Insights from multi-media and probabilistic risk model

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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION 2025年 197卷

作者： Li, Chenchen Yan, Jin Yao, Jun Xie, Ruosong Yu, Hanjing Yu, Wanquan Meng, Qi Dong, Peng Kunming Univ Sci & Technol Fac Met & Energy Engn Natl & Local Joint Engn Lab Lithium Ion Batteries Key Lab Adv Battery Mat Yunnan Prov Kunming 650093 Peoples R China China Univ Geosci Beijing Fac Water Resources & Environm Beijing 100083 Peoples R China Hong He Univ Sch Chem & Resources Engn Mengzi 661199 Peoples R China

Pollution from tailings ponds is a major environmental concern, yet systematic studies on anti-seepage tailings ponds remain scarce. This study assesses the environmental and health risks posed by heavy metals (HMs) contamination in an anti-seepage copper-nickel tailings pond located in Southwest China. Long-term monitoring and pollution assessment were conducted for cover soil, leachate, groundwater, surface water, and river sediments, along with a health risk assessment for the cover soil. Results showed that while groundwater remained uncontaminated, the concentrations of Cr, Cd, Ni, and Cu in cover soil exceeded background values by 5.8, 5.4, 4.7, and 3.6 times, respectively, surpassing regulatory limits. Leachate samples exhibited strong seasonal variation, with HM concentrations peaking during the rainy season, and Ni exceeded regulatory limits in all samples. The reuse of leachate for dust suppression was identified as a major contributor to cover soil contamination. Health risk assessment revealed unacceptable non-carcinogenic and carcinogenic risks, primarily driven by Cr exposure. Further analysis using positive matrix factorization, health risk assessment models, and Monte Carlo simulation quantified industrial contributions at 8.83 % for non-carcinogenic risk and 7.5 % for carcinogenic risk. This study provides a novel framework for integrating pollution source analysis and risk assessment in antiseepage tailings ponds, offering valuable insights for environmental risk management and process safety.

关键词： Anti-seepage tailings pond priority control Multiple environmental media Heavy metals Source-sink relationship

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priority control in Communication Networks for Accuracy-Freshness Tradeoff in Real-Time Road-Traffic Information Delivery

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IEEE ACCESS 2017年 5卷 25226-25235页

作者： Kato, Shingo Shinkuma, Ryoichi Kyoto Univ Grad Sch Informat Kyoto 6068501 Japan

Delivering real-time road-traffic information to the driver is a straightforward solution to the problem of road-traffic congestion. The information is more effective as it is fresh and more accurate. However, real-time road-traffic information delivery has a fundamental problem: an accuracy-freshness tradeoff. Unfortunately, real-time road-traffic information delivery has difficulty satisfying both requirements. To guarantee the freshness, the information needs to be delivered on the basis of the data received by a cloud or edge server before a predetermined deadline. However, only a limited amount of data is received due to bandwidth limitation and processing overhead in communication networks, which results in the poor accuracy of the delivered information. The only way to improve the accuracy is to make the deadline less strict, which results in deteriorating the freshness of information. The proposed system solves this tradeoff. The key idea is that data more "important" for the accuracy of information are more prioritized when the data are transferred in communication networks. In the proposed system, "importance" is determined by how helpful the data are when the system needs to estimate missing spatial information from a limited amount of received data by using the machine learning technique. In this paper, simulation results verify that the proposed system ensures the accuracy of road-traffic information while satisfying the freshness requirement.

关键词： Internet of Things road-traffic information real-time information delivery priority control active learning edge computing.

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priority control method by using non-uniform backoff slot probability in IEEE802.11 WLAN 10

Priority control method by using non-uniform backoff slot pr...

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10th International Conference on Information and Communication Technology Convergence (ICTC) - ICT Convergence Leading the Autonomous Future

作者： Kawahara, Yuki Sugiyama, Takatoshi Kogakuin Univ Grad Sch Engn Tokyo 1638677 Japan

ISBN: (纸本)9781728108933

When different applications such as Voice communication and Video stream upload exist in the same IEEE 802.11 WLAN, VoIP (Voice over IP) packet delay increases because of the longer packet of Video stream. Therefore, we propose a priority control method by using backoff value with non-uniform probability density. The probability densities of smaller backoff value are increased for VoIP packets, and the probability densities of larger backoff value are increased for Video packets. By using the proposed method, both the throughput improvement of Video stream and short delay of VoIP packets are realized. We perform computer simulation in an environment of Voice communication and Video stream upload applications. As a result of our simulations, the proposed method improves the Video stream throughput by 5.3% while keeping the similar VoIP packet delay to that by AIFSN control.

关键词： IEEE 802.11 Wireless LAN Backoff algorithm priority control AIFSN control

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priority control for photonic burst networks

Priority control for photonic burst networks

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Joint Conference of the 10th Asia-Pacific Conference on Communications/5th International Symposium on Mult-Dimensional Mobile Communication

作者： Sugimoto, Y Sugawara, S Kishi, N Miki, T Univ Electrocommun Tokyo Japan

ISBN: (纸本)0780386019

Concerning the composition method of photonic networks with combination of Wavelength Division Multiplex (WDM) and Optical Time Division Multiplex (OTDM), we studied on the dynamic bandwidth assignment algorithm for Photonic Burst Networks. In this paper the dynamic bandwidth assignment algorithm, which has the two modes, Real-time Mode and Reservation Mode, is proposed. In this algorithm, the prioritization scheme for aggregating packets into optical burst at the edge node in regional networks is investigated. And its network performance through computer simulation is evaluated.

关键词： WDM OTDM Photonic Burst Networks priority control

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Rule-based transit signal priority control method using a real-time transit travel time prediction model

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CANADIAN JOURNAL OF CIVIL ENGINEERING 2013年第1期40卷 68-75页

作者： Lee, Jinwoo Shalaby, Amer Queensland Univ Technol Fac Sci & Engn Civil Engn & Built Environm Sch Brisbane Qld 4001 Australia Univ Toronto Dept Civil Engn Toronto ON M5S 1A4 Canada

An advanced rule-based transit signal priority (TSP) control method is presented in this paper. An online transit travel time prediction model is the key component of the proposed method, which enables the selection of the most appropriate TSP plans for the prevailing traffic and transit condition. The new method also adopts a priority plan redevelopment feature that enables modifying or even switching the already implemented priority plan to accommodate changes in the traffic conditions. The proposed method utilizes conventional green extension and red truncation strategies and also two new strategies including green truncation and queue clearance. The new method is evaluated against a typical active TSP strategy and also the base case scenario assuming no TSP control in microsimulation. The evaluation results indicate that the proposed method can produce significant benefits in reducing the bus delay time and improving the service regularity with negligible adverse impacts on the non-transit street traffic.

关键词： transit priority bus priority traffic signal priority control rule-based control transit model

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Development of Wireless LAN Base Station with QoS control Based on Web-QoE by Bandwidth control and priority control

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ELECTRONICS AND COMMUNICATIONS IN JAPAN 2018年第5期101卷 12-21页

作者： Asano, Shiho Ito, Yoshihiro Nagoya Inst Technol Grad Sch Engn Nagoya Aichi Japan

This paper develops a wireless local area network (LAN) base station with quality of service control based on Web quality of experience (QoE) by bandwidth control and priority control;it evaluates the performance of the developed system by experiments with subjects. By using the relationship between importance of data of a Web service and the distribution of the length of IP packets, the base station can reduce the bandwidth consumption over a wireless LAN without worsening of QoE. The authors have implemented by adopting two technologies for priority control: OpenFlow and Wi-Fi multimedia. In the experiment, the authors treat three actual Web services and assess QoE for them. From the experimental results, the authors show the effectiveness of the developed base station.

关键词： priority control bandwidth control QoS QoE WMM OpenFlow

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Quick Suppression of DDoS Attacks by Frame priority control in IoT Backhaul With Construction of Mirai-Based Attacks

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IEEE ACCESS 2022年 10卷 22392-22399页

作者： Harada, Rintaro Shibata, Naotaka Kaneko, Shin Honda, Kazuaki Terada, Jun Ishida, Yota Akashi, Kunio Miyachi, Toshiyuki NTT Corp NTT Access Network Serv Syst Labs Yokosuka Kanagawa 2390847 Japan Natl Inst Informat & Commun Technol Nomi Ishikawa 9231211 Japan Univ Tokyo Grad Sch Informat Sci & Technol Bunkyo Ku Tokyo 1138656 Japan

We propose a novel distributed denial of service (DDoS) attack suppression system that significantly reduces discarding of normal traffic (i.e., the traffic from Internet of Things (IoT) devices that are not infected with a malware) with a small number of equipment by controlling the priority of frames in a network accommodating IoT devices. Experimental results showed that our proposed system prevented the discarding of the normal traffic in a few seconds when attack traffic was generated by a traffic generator. Moreover, we constructed Mirai-based DDoS attack traffic and experimentally demonstrated that the discarding of the normal traffic was prevented in 30 milliseconds in our proposed system. We also confirmed that the attack traffic detected by a DDoS protector that was installed in front of an IoT server was autonomously blocked at the switches that the traffic came through from the IoT devices (i.e., the entrances to a backbone network) by integrating various vendors' products.

关键词： Internet of Things Computer crime Servers Denial-of-service attack Monitoring Machine learning Costs Attack suppression distributed denial of service (DDoS) attack Internet of Things (IoT) priority control

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Autonomous Optical Buffer System for Synchronous Packets with priority control

Autonomous Optical Buffer System for Synchronous Packets wit...

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2015 International Conference on Photonics in Switching (PS)

作者： Masuoka, Hiroshi Maruo, Yuta Kishikawa, Hiroki Goto, Nobuo Yanagiya, Shin-ichiro Univ Tokushima Dept Opt Sci & Technol 2-1 Minamijosanjima Cho Tokushima 7708506 Japan

A scalable autonomous optical FDL buffer system for synchronous packets with priority control is proposed. The buffer having multiple input ports consists of 2:1 buffer modules. The buffering is autonomously controlle... 详细信息

ISBN: (纸本)9781479988211

关键词： optical buffer fiber delay line autonomous control priority control

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Implementing and Evaluating priority control Mechanism for Heterogeneous Remote Monitoring IoT System 2016

Implementing and Evaluating Priority Control Mechanism for H...

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13th Annual International Conference on Mobile and Ubiquitous Systems - Computing, Networking and Services (MobiQuitous)

作者： Tachibana, Takuma Furuichi, Tetsuo Mineno, Hiroshi Shizuoka Univ Grad Sch Integrated Sci & Technol Shizuoka Japan Shizuoka Univ Grad Sch Sci & Technol Shizuoka Japan Shizuoka Univ Coll Informat JST PRESTO Shizuoka Japan

ISBN: (纸本)9781450347594

All people expect the Internet of Things (IoT) to grow. Accordingly, there are various IoT devices. There is an extremely wide variety of data from IoT devices such as images, and sounds. It will become possible to construct a heterogeneous remote monitoring IoT system using various valuations of IoT devices. However, a heterogeneous remote monitoring IoT system cannot send data in completely because almost all mobile network services for the IoT system do not guarantee bandwidth. In this paper, we propose a priority control mechanism for a heterogeneous remote monitoring IoT system. The proposed mechanism enables a best-effort IoT system that guarantees only the minimum necessary data telecommunications. The proposed mechanism controls the priority by using application requirements. We implemented the proposed mechanism and evaluated its effectiveness with a sending ratio and average delay time of each priority. The sending ratio results of each priority increased to 29.2% in daytime. The average delay time results of each priority decreased by up to 96.0% in nighttime.

关键词： Internet of Things priority control mobile networks data collection

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JMS Scheduling Model Design and Implementation Based on priority control in the SOA System

JMS Scheduling Model Design and Implementation Based on Prio...

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International Conference on Information System and Artificial Intelligence (ISAI)

作者： Qiang, Bao-Hua Jia, Zi-Jie Wang, Peng Wang, Sai Wang, Yu-Feng Guilin Univ Elect Technol Guangxi Key Lab Trusted Software Guilin Peoples R China China Elect Technology Grp Corp Res Inst 54th Shijiazhuang Peoples R China

ISBN: (纸本)9781509015856

priority control is important in information systems that are designed according to SOA because there are services which have different functions and qualities, and a large amount of concurrent service requests may also occur at some point. A message scheduling model based on priority control of the service consumer is proposed. By adding an overall control queue between service consumers and service providers, the high-priority service scheduling that demands real-time process and the "hanger" phenomenon that happens in low-priority users are both well resolved. Stress tests through LoaderRunner and the comparisons with traditional model show the effectiveness of the message scheduling model.

关键词： SOA priority control Message Scheduling Model Overall control Queue

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