期刊：
Journal of Cleaner Production,2018年196:1365-1378 ISSN：0959-6526
通讯作者：
Zhao, Guo-yan
作者机构：
[Liang, Wei-zhang; Zhao, Guo-yan] Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Peoples R China.;[Hong, Chang-shou] Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Zhao, Guo-yan] Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Peoples R China.
关键词：
Circular economy (CE);Phosphorus chemical firm (PCF);Performance evaluation;Vlsekriterijumska optimizacija I;kompromisno resenje (VIKOR) method;Qualitative flexible (QUALIFLEX) method;Linguistic neutrosophic number (LNN)
摘要：
Confronting the dilemma of resource shortage and environmental pollution, the idea of circular economy (CE) has attracted widespread attentions. To address these problems, several industrial companies have incorporated the CE in their operation or design. In this sense, the phosphorus chemical firms (PCFs) are promoting CE to achieve sustainable development goals since phosphorus is a non-renewable resource and one of the nutrient elements essential for crop growth. Thus, this paper aims to find a suitable way to assess the performance of CE for PCFs. Firstly, the evaluation index system of CE is designed according to the characteristics of CE for PCFs. Then, a new framework based on the qualitative flexible (QUALIFLEX) and Vlsekriterijumska Optimizacija I Kompromisno Resenje (VIKOR) methods is established to pick out the best enterprise. The linguistic neutrosophic number (LNN) is advised to describe decision making information with linguistic true, hesitant and false membership degree. Moreover, an entropy-based approach is used to determine the index weights, and the VIKOR method is presented to determine the concordance index. After that, all possible permutations are itemized, and the ranking result is obtained according to the general concordance index values of each permutation: Finally, an example of assessing the performance of CE for PCFs in China is given to illustrate the proposed method, and its feasibility is demonstrated. The robustness and advantage of this approach are also indicated with sensitivity and comparison analysis. The results show that the proposed VIKOR-QUALIFLEX method is reliable and stable for assessing the performance of CE for PCFs, and provides references for the construction and management of CE for PCFs. (C) 2018 Elsevier Ltd. All rights reserved.
摘要：
It is the fact that there are lots of hazard incidents in underground uranium mines caused by radon but in-suit uranium samples were difficult to collect. Based on closed chamber method, three similar samples in different sealed ways were made in a laboratory with different material rations, namely uranium tailings, quartz sand, cement, iron powder and silicon powder to measure the radon concentrations with and without low-frequency vibrations, which was used by the experimental device for low-frequency vibration diffusion of radon. The results showed that the radon exhalation coming from the similar samples was influenced by the low frequency vibration; the results are presented as two-stage variations compared with the blank group. The radon exhalation increased with the rising vibration frequency when the frequency was 50 to 70 Hz, but fell slowly after reaching the peak radon exhalation rate. Analyses of the relations between the rock damage degree, changes in porosity and the occurrence of an inflection point in the radon exhalation rate in the samples found that they also increased when the frequency was between 0 to 80 in sample 3. The maximum porosity of the third samples was about 4.8% with a low-frequency vibration 60 Hz, while the maximum damage degree was about 0.07 at 50 Hz.
作者机构：
[Xu, Shoulong; Zou, Shuliang] Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Peoples R China.;[Xu, Shoulong] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China.;[Han, Yongchao; Qu, Yantao] China Inst Atom Energy, Beijing 102413, Peoples R China.
通讯机构：
[Zou, Shuliang] Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Peoples R China.
关键词：
active pixel sensor;video monitor;radiation detector;radiation damage;radiation response;nuclear accident
摘要：
In this paper, we present the availability of an active pixel sensor (APS) with four transistors (4T) as a video monitor and radiation detector. Analyzing radiation damage must be one of the first steps in recovering from nuclear accidents, and the radiation response characteristic is the basis for the use of 4T-APS to detect radiation. The goal of this work is to suggest the use of cameras with 4T-APS in widely distributed irradiation detectors. The total ionizing dose (TID) of radiation damage on 4T-APS provided a threshold. Radiation tolerance was improved with the help of a radiation shielding structure. The radiation response showed integration time dependence and pixel information dependence, and greater radiation response was observed from the pixels with lower grayscale values. Two methods are suggested based on different monitoring scenes. This study can help to greatly improve nuclear accident emergency response and the safety of nuclear facilities.
作者：
Deng, Xianjun;Tang, Zujun;Yi, Lingzhi*;Yang, Laurence T.
期刊：
IEEE Internet of Things Journal,2018年5(3):1463-1473 ISSN：2327-4662
通讯作者：
Yi, Lingzhi
作者机构：
[Tang, Zujun; Deng, Xianjun] Univ South China, Dept Commun Engn, Hengyang 421001, Peoples R China.;[Yi, Lingzhi] Univ South China, Sch Environm Protect & Safety Engn, Hengyang 421001, Peoples R China.;[Yang, Laurence T.] St Francis Xavier Univ, Dept Comp Sci, Antigonish, NS B2G2W5, Canada.
通讯机构：
[Yi, Lingzhi] Univ South China, Sch Environm Protect & Safety Engn, Hengyang 421001, Peoples R China.
关键词：
Confident information coverage (CIC)<&wdkj&>hole healing<&wdkj&>Internet of Things (IoT)<&wdkj&>narrowband IoT (NB-IoT)<&wdkj&>
摘要：
The Internet of Things (IoT) evolving from the conventional wireless sensor networks (WSNs) with more smart sensors has attracted significant attention. As one of the most crucial metrics for evaluating the quality of service (QoS) of both IoT and WSNs, sensing coverage characterizes the monitoring status of a sensing field of interest. However, the existence of coverage holes will remarkably degrade the QoS of the IoT. Based on the novel confident information coverage (CIC) model, this paper provides an in-depth study on how to energy-efficiently heal the multimodal CIC holes (MCICH) in a narrowband IoT (NB-IoT)-enabled hybrid IoT deployed for radiological pollution monitoring, where both mobile and stationary sensors equip multimodal sensing units for sensing dissimilar multimodal physical attributes and the NB-IoT provides satisfied network connectivity. We pinpoint the MCICH healing (MCICHH) problem with the objective of energy-efficiently dispatching a series of multimodal mobile IoT sensors to the CIC holes such that the MCIC holes can be headed and the CIC performance can be satisfied. After proving the NP-completeness of MCICHH by reducing it to the set partition problem, we develop a family of effective heuristic schemes including the centralized-MCICHH, the distributed-MCICHH and random CIC hole healing, all of which target for efficiently healing the MCIC holes while minimizing the total moving energy consumption of the dispatched multimodal mobile sensors or maximizing the average remaining energy of the multimodal mobile sensors. Extensive experiments verify the effectiveness and practicality of the proposed schemes.
作者：
Yi, Lingzhi;Deng, Xianjun*;Zou, Zenghui;Ding, Dexin;Yang, Laurence T.
期刊：
Journal of Parallel and Distributed Computing,2018年118(Part):57-66 ISSN：0743-7315
通讯作者：
Deng, Xianjun
作者机构：
[Yi, Lingzhi] Univ South China, Sch Civil Engn, Hengyang, Hunan, Peoples R China.;[Zou, Zenghui; Deng, Xianjun] Univ South China, Dept Commun Engn, Hengyang, Hunan, Peoples R China.;[Ding, Dexin] Univ South China, Sch Environm Protect & Safety Engn, Hengyang, Hunan, Peoples R China.;[Deng, Xianjun] St Francis Xavier Univ, Antigonish, NS, Canada.;[Yang, Laurence T.] St Francis Xavier Univ, Dept Comp Sci, Antigonish, NS, Canada.
通讯机构：
[Deng, Xianjun] Univ South China, Hengyang, Hunan, Peoples R China.
关键词：
Confident information coverage<&wdkj&>Coverage hole detection<&wdkj&>Sensor networks<&wdkj&>Cyber-enabled applications
摘要：
The wireless sensor networks recently abstract great attention and are used for a wide range of cyberenabled applications each of which with rigid accuracy requirements. The emergence and existence of coverage holes in WSNs will dramatically degrade the network coverage performance and quality of service. To diminish the negative effects of coverage holes, this paper addresses and studies the confident information coverage hole detection problem (CICHD) based on the proposed novel confident information coverage model (CIC). For solving the CICHD problem, we design two effective heuristic CIC holes detection algorithms including the CHD without considering the nodes residual energy and the other CHDRE taking the nodes' residual energy into account. In the both proposed algorithms, the sensing field is firstly partitioned into a series of reconstruction grids based on the spatial correlation and correlation range. Then each reconstruction grid will be scanned and detected based on the CIC model to be judged whether it is a hole. Once obtaining the coverage status of every reconstruction grid, the boundary of the coverage hole will be exacted by image processing method. The results of the simulations show that both the proposed schemes can efficiently detect the emerged coverage holes including the locations and the number, and the CHDRE algorithm is more practical and efficient compared to the CHD without considering the energy problem. (C) 2017 Elsevier Inc. All rights reserved.
摘要：
This paper highlights significant findings from focusing on developing a sustainable lightweight aggregate (LWA) concrete, which replaced Portland cement partially with municipal solid waste incineration fly ash (MSWI FA) and all of the conventional coarse aggregate with LWA sintered by MSWI FA, shale, and sludge. A series of four experiments, differing in dosage of MSWI FA and aggregate, were conducted for this project. The results of this study generally showed that appropriate amount of MSWI FA substitution for cement has no significantly lowered the compressive strengths of LWA concrete, while it can lower the oven-dry density and the thermal conductivity. The optimum performance of LWA concrete (after 28 days of curing) is as follows: (1) slump flow of 700 mm, (2) compressive strength of 30.14 MPa, (3) dry apparent density of 1.66 g/cm3, (4) thermal conductivity of 0.73 W (m K)−1; the mixture ratio of LWA, fly ash, cement, and fine sand is 3.0: 0.1: 0.9: 2.0 based on dry weight. Meanwhile, the results of leaching test are much lower than the concentration limits of hazardous constituents of hazardous waste identification standard (GB/T 5083.3-2007) and landfill standard (GB16889-2008).
摘要：
Radiological pollution, which poses a great threat to public health and environment safety, is one of the critical concerns in nuclear industries. The ever growing IIoT is a promising network paradigm for monitoring the radiological pollution level in uranium mill tailings. Coverage, as one of the most decisive indicators for evaluating the success of IIoT-based radiological pollution monitoring, reflects how well the sensing fields of interest are monitored. Nevertheless, the possible coverage holes resulting from sensors' random deployment, energy depletion, and hazardous conditions may remarkably lower the QoS, especially the coverage performance of IIoT-based radiological pollution monitoring. In order to avoid the potential emerging coverage holes' negative effects on the network QoS, this article focuses on the coverage hole detection issue from an energy-efficient perspective. By exploiting the merits of the CIC model, this article develops an EECICHD that detects the CIC holes by fully considering the sensor nodes' energy dissipation as well as their communication abilities. The EECICHD makes full use of the intrinsic spatial distribution correlation of monitored variables and collaborative sensing among neighboring sensors for improving the efficiency of CIC holes detection. Through simulation experiments, we show that the proposed EECICHD scheme can efficiently localize and determine the locations and number of the CIC holes.
期刊：
Journal of Cleaner Production,2018年183:261-271 ISSN：0959-6526
通讯作者：
Wang, Hanqing
作者机构：
[Sui, Yang; Wang, Hanqing] Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Peoples R China.;[Ding, Rui; Sui, Yang] Fujian Fuqing Nucl Power Co Ltd, Fuqing 350300, Peoples R China.
通讯机构：
[Wang, Hanqing] Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Peoples R China.
关键词：
Operating nuclear power plant<&wdkj&>Integrated management system<&wdkj&>Occupational health and safety and environment<&wdkj&>Management information system<&wdkj&>Information-sharing platform
摘要：
In order to implement the integration management of the occupational health and safety and environment (OHSE) in an operating nuclear power plant (ONPP) in East China and help it pass the OHSAS 18001 and ISO 14001 certifications simultaneously rather than separately, an integrated management system (IMS) for OHSE in the ONPP consisting of the occupational health and safety and environment management manual (OHSEMM) and its supportive documents was established to cover the OHSAS 18001 and ISO 14001 standards and IAEA's safety standards on management systems. The management information system for the IMS for the ONPP in East China (MISIMSONPPEC) consisting of the core zone, which includes the information-sharing platform (ISP) and the functional management system (FMS), client and background system was designed for the first time by using browser/server (B/S) structure to overcome the difficulties in implementing the IMS. The applications of the MISIMSONPPEC in the ONPP show that it helped to share and statistically analyze the OHSE data and information from the IMS, to improve the cooperation between departments, to enhance the efficiency of management, and to pass the OHSAS 18001 and ISO 14001 certifications simultaneously rather than separately; and it helped accomplish the integration management of the OHSE in the ONPP.
期刊：
Acta crystallographica. Section E, Structure reports online,2011年67(7):m875 ISSN：1600-5368
通讯作者：
Zhang, Xiao-Wen
作者机构：
[Zhang, Xiao-Wen] Univ S China, Coll Environm Protect & Safety Engn, Hengyang 421001, Peoples R China.;[Fan, Ting] Univ S China, Key Lab Pollut Control & Resource Use Hunan Prov, Hengyang 421001, Peoples R China.
通讯机构：
[Zhang, Xiao-Wen] Univ S China, Coll Environm Protect & Safety Engn, Hengyang 421001, Peoples R China.
摘要：
In the title compound, [Bi(C(20)H(17)N)(ClO(4))] or C(20)H(17)BiClNO(4), the Bi(III) ion assumes a distorted psi trigonal-bipyramidal geometry, with two C atoms and the electron lone pair of the Bi atom at the equatorial positions and an amine N atom and a perchlorate O atom at the apical positions. Weak inter-molecular C-Hcdots, three dots, centeredO hydrogen bonding is present in the crystal structure.
摘要：
Sodium alginate / graphene oxide/ gallic acid (SA/GO/GA) complex gel beads were prepared and were characterized. Removal efficiency of algae onto SA/GO/GA complex gel beads were investigated with different GO and GA content. The results showed that the removal efficiency of algae from aqueous solutions using SA gel beads were very low, but introduction of GO and GA of complex gel beads could sharply increase the removal efficiency of algae onto by 3 times. The amounts of SA/ GO/GA complex gel beads have significant effect on removal of algae. In addition, for the density algae in the range of 2.17-17.36 cells/mL, there was a linear relation between the removal efficiency of algae and the density algae. This stoichiometric linear relation has directed significance to engineering application in eutrophic waters.
