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  1. Article ; Online: Study and Evaluation of Dynamic Carrying Capacity of Groundwater Resources in Hebei Province from 2010 to 2017

    Boxin Wang / Bin Wang / Xiaobing Zhao / Jiao Li / Dasheng Zhang

    Sustainability, Vol 15, Iss 4394, p

    2023  Volume 4394

    Abstract: There is a severe issue with groundwater overuse and water scarcity in the North China Plain. The capacity of groundwater resources to promote economic development is also diminished due to the overexploitation of resources to suit the industrial needs ... ...

    Abstract There is a severe issue with groundwater overuse and water scarcity in the North China Plain. The capacity of groundwater resources to promote economic development is also diminished due to the overexploitation of resources to suit the industrial needs of diverse sectors. Therefore, it is crucial to research the regional groundwater resource carrying capacity from both a temporal and spatial perspective. The relationship between water usage efficiency and groundwater availability, which was built using regional data on water supply and consumption as well as gross domestic product, is used in this study to assess the carrying capacity of Hebei’s groundwater resources through time and space. The results show that from the perspective of time, in the years when the groundwater resource exploitation degree is greater than one from 2010 to 2017, the contribution rate of the groundwater resource exploitation to economic development reaches 62.5%, indicating that the economic development of the study area is highly dependent on the groundwater resources. The exploitation degree of groundwater resources is less than one, but the degree of economic development value keeps increasing to nearly 80% and the overexploitation rate is 75% in the total time scale. In terms of spatial scale, only Hengshui City has no overexploitation index, and the overexploitation rate is 9.1%. The overload and severe overload areas account for 45.45%, respectively. Among them, the exploitation degree of groundwater has been in a state of over-saturation, and as economic development depends on groundwater resources, water efficiency needs to be improved through water saving. Optimizing and promoting industrial structures and water-saving technology to further improve water efficiency are key factors to improve the carrying capacity of groundwater resources.
    Keywords groundwater resources ; degree of groundwater exploitation ; water utilization efficiency ; degree of social and economic development ; Hebei ; Environmental effects of industries and plants ; TD194-195 ; Renewable energy sources ; TJ807-830 ; Environmental sciences ; GE1-350
    Subject code 550
    Language English
    Publishing date 2023-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Clinical study on the efficacy and safety of percutaneous endoscopic anterior cervical discectomy in the treatment of cervical disc herniation.

    Haijun, Ma / Haoping, Zhang / Honggang, Zhou / Xiaobing, Zhao

    International orthopaedics

    2021  Volume 45, Issue 5, Page(s) 1247–1256

    Abstract: Purpose: To compare the clinical efficacy of anterior percutaneous endoscopic cervical discectomy (APECD) and anterior cervical decompression and fusion (ACDF) in the treatment of cervical disc herniation.: Methods: A total of 115 cases of cervical ... ...

    Abstract Purpose: To compare the clinical efficacy of anterior percutaneous endoscopic cervical discectomy (APECD) and anterior cervical decompression and fusion (ACDF) in the treatment of cervical disc herniation.
    Methods: A total of 115 cases of cervical disc herniation treated in our hospital from May 2016 to August 2018 were selected. The subjects were divided into APECD and ACDF groups. The operation time, intra-operative blood loss, and hospital stay of the two groups were recorded and compared, and the clinical symptoms were recorded at one week, one year, and two years after the operation. The neck and upper limb visual analog scale (VAS) score, Japanese Orthopedic Association (JOA) score, cervical range of motion (ROM), post-operative cervical lordosis angle and adjacent vertebral body height were compared between the two groups.
    Results: All 115 patients underwent successful operations. The intra-operative blood loss and operation time in the APECD group were significantly less than those in the ACDF group (P < 0.05). There were no oesophago-tracheal sheaths, carotid artery sheaths, cervical sympathetic trunks, vertebral artery injuries, or dural tears in the two groups. The JOA and VAS scores of the two groups significantly improved from pre- to post-operatively, but there were no significant differences between the two groups at the last follow-up (P > 0.05). The post-operative radiological results showed that the herniated cervical intervertebral disc was removed completely. One year after the operation, the cervical lordosis angle increased significantly in both groups (P < 0.05). However, ROM decreased significantly in the ACDF group (P < 0.05), and there was no significant change in ROM in the APECD group (P > 0.05). The cervical lordosis angle did not significantly differ between the two groups at the last follow-up (P > 0.05), but there was a significant difference in ROM between the two groups at the last follow-up (P < 0.05). In the ACDF group, the height of the adjacent vertebral body increased 1 year after the operation (P < 0.05). In the APECD group, the height of the adjacent vertebral body decreased one year after the operation, but the value was not significantly different from the pre-operative value (P > 0.05). There was a significant difference in the height of the adjacent vertebral body between the two groups at the last follow-up (P < 0.05). The incidence of post-operative complications did not significantly differ between the two groups (P > 0.05).
    Conclusion: APECD is a minimally invasive treatment that is safe and effective. The medium- and short-term effects of APECD and ACDF in the treatment of cervical disc herniation are similar. In addition, APECD is superior to ACDF in the operation time, intra-operative blood loss, and ROM. However, prospective, multicenter studies with longer follow-up periods need to be conducted, and the recurrence rate and intervertebral height loss need to be studied.
    Language English
    Publishing date 2021-03-02
    Publishing country Germany
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 80384-4
    ISSN 1432-5195 ; 0341-2695
    ISSN (online) 1432-5195
    ISSN 0341-2695
    DOI 10.1007/s00264-021-04982-x
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  3. Article ; Online: A Novel Improved Reversible Visible Image Watermarking Algorithm Based on Grad-CAM and JND

    Jiasheng Qu / Wei Song / Xiangchun Liu / Lizhi Zhao / Xiaobing Zhao

    Security and Communication Networks, Vol

    2021  Volume 2021

    Abstract: With the rapid access convenience of content brought by 5G technology, the integrity protection of content becomes more important. The reversible visible watermarking algorithm has attracted more attention due to its effective content protection. In this ...

    Abstract With the rapid access convenience of content brought by 5G technology, the integrity protection of content becomes more important. The reversible visible watermarking algorithm has attracted more attention due to its effective content protection. In this paper, a novel improved reversible visible image watermarking scheme based on gradient-weighted class activation mapping (Grad-CAM) and the just noticeable difference (JND) model has been presented. The proposed region of interest (ROI) selection strategy is used to locate the main protected body of images for watermark embedding. Divide the watermark and ROI into nonoverlapping blocks in the same way and then embed the classified two types of watermark blocks into corresponding ROI blocks with the JND model. The optimal bit positions for watermark embedding can be selected adaptively with JND threshold and achieve the tradeoff between the watermark visibility and watermarked image quality. For lossless image recovery and watermark extraction, the recovery information is reversibly hidden into watermarked image. In the experiments, the same process of grayscale images is used to each channel separately for color images watermarking. Besides, there are six aspects in this paper to estimate the proposed scheme; with the comparison to other reversible visible watermarking schemes, experimental results demonstrate the effectiveness of our proposed scheme.
    Keywords Technology (General) ; T1-995 ; Science (General) ; Q1-390
    Subject code 629
    Language English
    Publishing date 2021-01-01T00:00:00Z
    Publisher Hindawi-Wiley
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Understanding Dynamic Status Change of Hospital Stay and Cost Accumulation via Combining Continuous and Finitely Jumped Processes

    Yanqiao Zheng / Xiaobing Zhao / Xiaoqi Zhang

    Computational and Mathematical Methods in Medicine, Vol

    2018  Volume 2018

    Abstract: The Coxian phase-type models and the joint models of longitudinal and event time have been extensively used in the studies of medical outcome data. Coxian phase-type models have the finite-jump property while the joint models usually assume a continuous ... ...

    Abstract The Coxian phase-type models and the joint models of longitudinal and event time have been extensively used in the studies of medical outcome data. Coxian phase-type models have the finite-jump property while the joint models usually assume a continuous variation. The gap between continuity and discreteness makes the two models rarely used together. In this paper, a partition-based approach is proposed to jointly model the charge accumulation process and the time to discharge. The key construction of our new approach is a set of partition cells with their boundaries determined by a family of differential equations. Using the cells, our new approach makes it possible to incorporate finite jumps induced by a Coxian phase-type model into the charge accumulation process, therefore taking advantage of both the Coxian phase-type models and joint models. As a benefit, a couple of measures of the “cost” of staying in each medical stage (identified with phases of a Coxian phase-type model) are derived, which cannot be approached without considering the joint models and the Coxian phase-type models together. A two-step procedure is provided to generate consistent estimation of model parameters, which is applied to a subsample drawn from a well-known medical cost database.
    Keywords Computer applications to medicine. Medical informatics ; R858-859.7
    Language English
    Publishing date 2018-01-01T00:00:00Z
    Publisher Hindawi Limited
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Mining the Hidden Link Structure from Distribution Flows for a Spatial Social Network

    Yanqiao Zheng / Xiaobing Zhao / Xiaoqi Zhang / Xinyue Ye / Qiwen Dai

    Complexity, Vol

    2019  Volume 2019

    Abstract: This study aims at developing a non-(semi-)parametric method to extract the hidden network structure from the {0,1}-valued distribution flow data with missing observations on the links between nodes. Such an input data type widely exists in the studies ... ...

    Abstract This study aims at developing a non-(semi-)parametric method to extract the hidden network structure from the {0,1}-valued distribution flow data with missing observations on the links between nodes. Such an input data type widely exists in the studies of information propagation process, such as the rumor spreading through social media. In that case, a social network does exist as the media of the spreading process, but its link structure is completely unobservable; therefore, it is important to make inference of the structure (links) of the hidden network. Unlike the previous studies on this topic which only consider abstract networks, we believe that apart from the link structure, different social-economic features and different geographic locations of nodes can also play critical roles in shaping the spreading process, which has to be taken into account. To uncover the hidden link structure and its dependence on the external social-economic features of the node set, a multidimensional spatial social network model is constructed in this study with the spatial dimension large enough to account for all influential social-economic factors. Based on the spatial network, we propose a nonparametric mean-field equation to govern the rumor spreading process and apply the likelihood estimator to make inference of the unknown link structure from the observed rumor distribution flows. Our method turns out easily extendible to cover the class of block networks that are useful in most real applications. The method is tested through simulated data and demonstrated on a data set of rumor spreading on Twitter.
    Keywords Electronic computers. Computer science ; QA75.5-76.95
    Subject code 910
    Language English
    Publishing date 2019-01-01T00:00:00Z
    Publisher Hindawi-Wiley
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article: Suitability for developing riverside groundwater sources along Songhua River, Northeast China

    Yin, Wenjie / Litang Hu / Menglin Zhang / Xiaobing Zhao / Yanguo Teng / Yuanzheng Zhai

    Human and ecological risk assessment. 2018 Nov. 17, v. 24, no. 8

    2018  

    Abstract: Riverbank filtration is a natural water treatment technology that consists of extracting water from rivers by pumping wells located in the adjacent alluvial aquifer. It is vital to choose the most appropriate from multiple potential candidate sites, ... ...

    Abstract Riverbank filtration is a natural water treatment technology that consists of extracting water from rivers by pumping wells located in the adjacent alluvial aquifer. It is vital to choose the most appropriate from multiple potential candidate sites, which is a complex procedure and seldom paid attention to. In this study, a method system including multicriteria evaluation indexes was developed with which the suitability of bank filtration along the Songhua River of China for developing riverside groundwater sources was assessed. The system was comprised of main suitability indexes for water quantity, water quality, interaction intensity between surface water and groundwater, and the exploitation condition of aquifer condition, weights of which were determined by specialist marking methods. Based on this assessment system, the suitability of the study area was divided into five grades. Results show that riversides along Lalin River, Hulan River, and the middle part of Songhua River are suitable for developing riverside groundwater sources.
    Keywords aquifers ; filtration ; groundwater ; riparian areas ; river water ; rivers ; surface water ; water quality ; water quantity ; water treatment ; wells ; China
    Language English
    Dates of publication 2018-1117
    Size p. 2088-2100.
    Publishing place Taylor & Francis
    Document type Article
    ISSN 1549-7860
    DOI 10.1080/10807039.2018.1438174
    Database NAL-Catalogue (AGRICOLA)

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  7. Article ; Online: Trans-interlamina percutaneous endoscopic cervical discectomy for symptomatic cervical spondylotic radiculopathy using the new Delta system.

    Haijun, Ma / Xiaobing, Zhao / Bin, Geng / Jinwen, He / Dacheng, Zhao / Shenghong, Wang / Honggang, Zhou / Yayi, Xia

    Scientific reports

    2020  Volume 10, Issue 1, Page(s) 10290

    Abstract: To describe the rationale and surgical technique and compare the clinical effect of posterior percutaneous endoscopic cervical discectomy (PPECD) using the Delta system versus that of conventional PPECD (key-hole) surgery for the treatment of symptomatic ...

    Abstract To describe the rationale and surgical technique and compare the clinical effect of posterior percutaneous endoscopic cervical discectomy (PPECD) using the Delta system versus that of conventional PPECD (key-hole) surgery for the treatment of symptomatic cervical spondylotic radiculopathy (CSR). A retrospective analysis was performed on 106 single-segment CSR patients between February 2016 and February 2017, 50 of whom underwent conventional PPECD (key-hole), and 56 underwent PPECD using the Delta system. The operative time, intraoperative blood loss, intraoperative complications and postoperative hospital stay were recorded, and the clinical effect was evaluated by the indicators of the Neck Disability Index (NDI), arm-visual analog scale (arm-VAS), neck-VAS, EQ-5D and MacNab classification at the last follow-up. All patients underwent the operation successfully, and 106 patients were followed up. The operative time of the Delta group was 60.47 ± 0.71 min, while the operative time of the key-hole group was 75.46 ± 0.41 min. The difference between the two groups was statistically significant (P < 0.05). However, there was no significant difference between the two groups in terms of blood loss and hospital stay (P > 0.05). The VAS, NDI and EQ-5D scores of the neck and upper limbs in the two groups were significantly better than those before surgery at 1 week after surgery and at the last follow-up (P < 0.05). However, there was no significant difference between the two groups at the last follow-up (P > 0.05). At the last follow-up, there was no significant difference between the two surgical methods when evaluated using the modified MacNab criteria. The imaging results showed that the herniated disc was removed completely and the nerve root was decompressed. The complication rate in the Delta group (3/56, 5.35%) was significantly lower than that in the conventional key-hole group (5/50, 10.0%). PPECD using the Delta system for CSR may be a feasible and promising alternative surgical plan. Compared with the traditional key-hole method, this surgical system can not only provide the surgeon with a larger surgical field of vision but also reduces the operation time and complication rates.
    MeSH term(s) Blood Loss, Surgical/statistics & numerical data ; Cervical Vertebrae/diagnostic imaging ; Cervical Vertebrae/surgery ; Diskectomy, Percutaneous/adverse effects ; Diskectomy, Percutaneous/instrumentation ; Diskectomy, Percutaneous/methods ; Endoscopy/adverse effects ; Endoscopy/instrumentation ; Endoscopy/methods ; Feasibility Studies ; Follow-Up Studies ; Humans ; Intervertebral Disc/diagnostic imaging ; Intervertebral Disc/surgery ; Intervertebral Disc Displacement/diagnosis ; Intervertebral Disc Displacement/etiology ; Intervertebral Disc Displacement/surgery ; Length of Stay/statistics & numerical data ; Magnetic Resonance Imaging ; Middle Aged ; Operative Time ; Pain Measurement ; Radiculopathy/diagnosis ; Radiculopathy/etiology ; Radiculopathy/surgery ; Retrospective Studies ; Spondylosis/complications ; Spondylosis/diagnosis ; Spondylosis/surgery ; Tomography, X-Ray Computed ; Treatment Outcome
    Language English
    Publishing date 2020-06-24
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-020-67381-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: A GIS-based LVF model for semiquantitative assessment of groundwater pollution risk: A case study in Shenyang, NE China

    Zhang, Junjun / Huan Huan / Jinsheng Wang / Pengwei Xue / Xiaobing Zhao / Yanguo Teng / Yuanzheng Zhai

    Human and ecological risk assessment. 2017 Feb. 17, v. 23, no. 2

    2017  

    Abstract: Groundwater pollution risk assessment is a useful tool to prevent and control groundwater pollution, but its quantitative research is still relatively immature. In this study, a geographic information system based LVF model for a semiquantitative ... ...

    Abstract Groundwater pollution risk assessment is a useful tool to prevent and control groundwater pollution, but its quantitative research is still relatively immature. In this study, a geographic information system based LVF model for a semiquantitative assessment of groundwater pollution risk is established, based on the groundwater pollution source load (L), groundwater vulnerability (V), and groundwater function value (F). Further, the pollution source load is characterized by seven specific pollution sources, the vulnerability is calculated by the modified DRASTIC method, and the groundwater function value is evaluated with the water quality and quantity. The model was used to assess the risk of shallow groundwater pollution in Shenyang city, Northeast China, with an area of 8,263 km ². The results show that highest risk areas account for 16.3% of the study area and are mainly distributed in the east of the study area. High risk areas are significantly affected by a shallow buried depth of groundwater and many types of harmful pollutants from industrial, agricultural, and domestic pollution sources. The evaluation results reflect the risk of groundwater pollution in the Shenyang area, which is relevant to the management and sustainable use of groundwater resources in the area.
    Keywords case studies ; environmental assessment ; geographic information systems ; groundwater ; groundwater contamination ; models ; pollutants ; quantitative analysis ; risk ; risk assessment ; water quality ; China
    Language English
    Dates of publication 2017-0217
    Size p. 276-298.
    Publishing place Taylor & Francis
    Document type Article
    ISSN 1549-7860
    DOI 10.1080/10807039.2016.1245099
    Database NAL-Catalogue (AGRICOLA)

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  9. Article: Groundwater nitrate pollution and human health risk assessment by using HHRA model in an agricultural area, NE China

    Zhai, Yuanzheng / Jin Wu / Junjun Zhang / Rui Zuo / Xiao Li / Xiaobing Zhao / Yanguo Teng

    Ecotoxicology and environmental safety. 2017 Mar., v. 137

    2017  

    Abstract: In order to learn the pollution circumstance of groundwater nitrate detailedly in Songnen Plain of Northeast China and estimate its potential risk to human health of local residents, a total of 389 groundwater samples were collected in 2014 and studied ... ...

    Abstract In order to learn the pollution circumstance of groundwater nitrate detailedly in Songnen Plain of Northeast China and estimate its potential risk to human health of local residents, a total of 389 groundwater samples were collected in 2014 and studied from residential areas and public water supply wells in 11 cities and counties in southeastern of Songnen Plain. The analysis results showed that the spatial distributions of main chemical components in groundwater had great variations with statistical concentrations in the order of TDS> HCO3> Ca> NO3> Cl> Na> SO4> Mg> K> NH4> NO2. As for NO3, it ranged from less than 0.02mg/L to 497mg/L with an average value of 39.46mg/L indicating an obviously anthropogenic pollution. Even more than 32% of the samples exceeded the Grade III threshold (20mg/L of N) according to China's standard. The results obtained from principal component analysis showed that high NO3 concentration could be attributed to human activities, especially the excessive use of chemical fertilizers in agriculture. Further, a human health risk assessment (HHRA) model derived from the US Environmental Protection Agency (USEPA) was applied to estimate the potential health risk of groundwater nitrate considering both drinking water and dermal contact pathways. The results indicated that potential health risks of adult males and females within about 60% of the area were at the acceptable level, while those within about 40% were beyond the acceptable level. The area at the acceptable level for children covered 49% of the total area while the same value for infants was 37%. The NO3 concentration in southeast and northeast of the study area was the highest so that residents in these regions were at the highest health risk. In conclusion, risk levels for different crowds in the study area varied obviously, generally in the order of infants> children> adult females> adult males, and the potential health risks of residents, especially minors and rural residents, should cause enough attention both from the society and the academic community.
    Keywords adults ; ammonium compounds ; bicarbonates ; calcium ; children ; cities ; drinking water ; females ; groundwater ; human health ; humans ; infants ; magnesium ; males ; mineral fertilizers ; models ; nitrates ; nitrogen dioxide ; pollution ; potassium ; principal component analysis ; public water supply ; residential areas ; risk ; risk assessment ; society ; sodium ; United States Environmental Protection Agency ; wells ; China ; United States
    Language English
    Dates of publication 2017-03
    Size p. 130-142.
    Publishing place Elsevier Inc.
    Document type Article
    ZDB-ID 436536-7
    ISSN 1090-2414 ; 0147-6513
    ISSN (online) 1090-2414
    ISSN 0147-6513
    DOI 10.1016/j.ecoenv.2016.11.010
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    Z 3684: Show issues

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  10. Article: Does the groundwater nitrate pollution in China pose a risk to human health? A critical review of published data

    Zhai, Yuanzheng / Yan Lei / Jin Wu / Yanguo Teng / Jinsheng Wang / Xiaobing Zhao / Xiaodong Pan

    Environmental science and pollution research international. 2017 Feb., v. 24, no. 4

    2017  

    Abstract: Nitrate pollution has pervaded many parts of the world, especially in developing countries such as China. Based on the available groundwater nitrate data sets in China (2000–2015), the groundwater pollution levels at the provincial scale are evaluated ... ...

    Abstract Nitrate pollution has pervaded many parts of the world, especially in developing countries such as China. Based on the available groundwater nitrate data sets in China (2000–2015), the groundwater pollution levels at the provincial scale are evaluated which contains 33 provinces (units) except for Macau because of lacking data. Then, the potential risks posed to human health in national scale are quantified. In order to make the results more precise and systematical, both drinking and dermal contact exposure pathways are considered, and the influenced crowd are more finely divided into four groups to study the impacts of age and gender on the outcome, which include infants (0–6 months), children (7 months–17 years old), adult males (18 years old–), and adult females (18 years old–). Results indicate that there are seven units whose groundwater nitrate concentrations exceed the standard value with Shaanxi being a seriously poor condition. Facing the same level of nitrate, the health risk level changes in the order of infants > children > adult males > adult females. That is to say, minors and males are more vulnerable compared with adults and females, respectively. There is no adverse effect on adult females of the whole country, while gender really impacts on the health risk assessment result. Adult males, children, and infants face various degrees of health risk respectively in Shaanxi and Shandong, which are needed to pay more attention to.
    Keywords adults ; adverse effects ; children ; data collection ; developing countries ; drinking ; exposure pathways ; females ; groundwater ; groundwater contamination ; health effects assessments ; human health ; infants ; males ; nitrates ; risk ; China ; Macau
    Language English
    Dates of publication 2017-02
    Size p. 3640-3653.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-016-8088-9
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    Z 5915: Show issues

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