bluuebunny/crossref_metadata_2025_split huggingface dataset:
Microbial Risks in Household GAC Filters Increased with Residence Time
Authors: Fu Jiannan , Chen Yucheng , Wang Yi , Ding Jian , Zhao Xiaolan , Yu Yingjun , Wei Weizhi , Chen Xiao 
Published: March 2020

Abstract
The research studied microbial contamination in household GAC filters with residence time. Initial GAC effluents were collected and stored in different circumstances (glass cup, silver cup and new GAC), Bacterial growth in GAC effluents and stored samples were detected during the 3-day residence time simultaneously. Besides, microbiome diversities in the GAC unit were measured for one month. Three main conclusions were found: (1) the maximum microbial counts were higher in storage water than in GAC filters. (2) The growth rates were faster in filters than those in storage water in a shorter residence time and the microbial risks were apparent initially. (3) The pH level decreased with residence time and the oxidation properties increased due to the desorption of GAC. The research provided useful information for optimizing household purifiers usage.
A comprehensive experimental of degradation of pollutants in oil fields by sodium persulfate
Authors: Zhang Zhifang , Xue Yuying , Dong Sanbao , Tang Ying , Xiang Yulin 
Published: March 2020

Abstract
A comprehensive experiment of Fenton-like method was designed to degrade oilfield pollutants. The effects of sodium persulfate on viscosity reduction of oilfield pollutants under different reaction conditions were investigated. The emphasis was put on the determination of viscosity, and the method of data processing should be learned to optimize the best viscosity reduction scheme. The experimental content can be closely combined with the basic theoretical knowledge of Applied Chemistry in oilfields, and can be applied to field practice. It helps students to understand the role of viscosity reducers and improve their functional ability of applying chemical knowledge. At the same time, the degradation and treatment methods of oilfield pollutants meet the requirements of green chemistry and enable students to establish environmental protection concept.
Research on CO2 Emission Efficiency and Emission Reduction Potential in Beijing-Tianjin-Hebei Region
Authors: Liang Ningning 
Published: March 2020

Abstract
In the context of Beijing-Tianjin-Hebei coordinated development strategy, the paper selects 13 cities in Beijing-Tianjin-Hebei region as research objects, the CO2 emission efficiency and emission reduction potential of each city are analyzed in order to provide reference for achieving the target of carbon emission peak through coordinated reduction among cities. Firstly, the emission efficiency of CO2 of 13 cities in Beijing, Tianjin and Hebei in 2005-2014 was estimated using the non expected output SBM model. Then, the emission reduction potential of cities is quantitatively analyzed based on equity and efficiency of the emission reduction potential index. The results show that the overall carbon emission efficiency of Beijing-Tianjin-Hebei city is decreasing during the research period. The urban emission reduction potential index has the same trend, and Beijing has the lowest emission reduction potential and Tangshan has the highest emission reduction potential.
An Empirical Study of the Carbon Emission Kuznets Curve in Tianjin
Authors: Chen Pengju 
Published: March 2020

Abstract
With the reform and opening up, China's economy had developed with high speed, but the problem of carbon emissions has become increasingly prominent. Based on the traditional environmental Kuznets model, this paper studies the relationship between carbon emissions and economic growth in Tianjin from 2009 to 2018, and considers three control variables of industrial structure, energy intensity and urbanization level. The impact of carbon emissions, the establishment of an extended Kuznets model for comprehensive analysis. The results show that: First, there is no inverted “U” relationship between industrial carbon emissions and economic growth in Tianjin, it is a kind of inverted “N” type curve relationship, and it is currently at the second turning point. Second, Tianjin's carbon emissions are also affected by industrial structure, energy intensity and urbanization rate. The share of secondary industry and energy intensity have a positive impact on carbon dioxide emissions, and the impact of urbanization on carbon emissions is also very low.
Study on the Harmonious Development of Carbon Emission and Eco-environment in Logistics Industry -- Taking Beijing-Tianjin a- Hebei as an example
Authors: Bao Jinjian , Li Hong 
Published: March 2020

Abstract
As the capital economic circle of China, Beijing-Tianjin-Hebei has always been a model for national development, but with the development of its economy, environmental issues have increasingly attracted the attention of the state. I Combined with the current background of the times, it is necessary to study the carbon emissions of the logistics industry in Beijing-Tianjin-Hebei. Through the research on the carbon emission situation of the logistics industry in Beijing-Tianjin- Hebei in the past ten years, the sample data was selected to construct the coupling index system of carbon emission and ecological environment in the logistics industry. The coupling model and the system coupling coordination degree model were analyzed to obtain the Beijing-Tianjin The coupling coordination degree of the vast ecosystem is in a relatively coordinated development stage, showing a trend of rising volatility. In response to this summary, the opinions on optimizing the industrial structure of the logistics industry and jointly controlling carbon emissions with the state and enterprises are given, in order to finally realize the low-carbon transformation and sustainable development of the logistics industry.
Effect of rainfall intensity on PM10 and PM2.5 scavenging in Guangzhou at night
Authors: Wang Yiming , He Li 
Published: March 2020

Abstract
The Lingnan area is a region where frequent rainfall occurs in mainland China. In addition to the special occurrence period, the nighttime rainfall has obvious seasonal characteristics, which is different from the climatic boundary conditions during the daytime, and has a great influence on the migration and transformation process of atmospheric pollutants. By counting the observations of atmospheric particulate matter (PM2.5, PM10) before and after rainfall in the Pearl River Delta region, the average clearance rate of PM10 and PM2.5 for the whole region was 2.36% and 1.41%, and the average clearance rate of night rainfall was calculated. 6.44%, 4.22%. The results show that the rainfall can effectively remove atmospheric particulate pollutants through wet deposition, and the nighttime rainfall is more effective than the daytime rainfall on the atmospheric particulate matter. Through classification discussion, it is found that the greater the rainfall intensity, the longer the rainfall time, the larger the particle size, and the more obvious the advantage of night rain.
Research Progress on bacterial cutinases for plastic pollution
Authors: Xu Ziyu 
Published: March 2020

Abstract
Cutinases(3.1.1.74) are serine esterases that belong to the α/β hydrolase family. Such enzymes are usually produced by phytopathogenic microorganisms in order to penetrate their hosts. Cutinase can degrade the stratum corneum in the leaves or the keratin of the cork in the bark. Cutinase hydrolyzes soluble esters, insoluble triglycerides and various polyesters. In addition to the hydrolysis reaction, cutinase also shows synthetic activity and transester activity. Therefore, as a multifunctional enzyme, cutinase has many fields of application. In recent years, it has been found that cutinase can biodegrade plastic and biomoodifie synthetic fibers. Cutinase is the most important enzyme in solving plastic pollution.
Study on CO2 capture by AAILs-MDEA aqueous solution in packed tower
Authors: Zhong Zhong , Liao Yujie , Fu Dong 
Published: March 2020

Abstract
This study mainly uses N-methyldiethanolamine (MDEA) as the main body of absorption, and uses three kinds of AAILs(AAILs), 1-butyl-3-methylimidazolium lysinate ([Bmim][Lys]), tetramethylammonium glycinate ([N1111][Gly]) and 1-butyl-3-methylimidazolium glycinate ([Bmim][Gly]) as accelerator, respectively. That forms a new blended aqueous solution for CO2 removal. The new AAILs-MDEA aqueous solution absorbent has stronger ability to absorb CO2, faster absorption rate and lower equipment corrosion. When the gas flow rate is 500ml/min and the liquid flow rate is 150ml/min, the best removal efficiency is achieved. At 313.2K, the removal efficiency of MDEA-[N1111] [Gly] absorbent can reach 100%; the effect of the three new alkanolamine aqueous solutions on CO2 absorption is: MDEA-[N1111][Gly]>MDEA-[Bmim] [Gly]>MDEA-[Bmim][Lys].
Identification of Rheological Model of the Layer Composite Rock Mass and Its Application
Authors: Han Bing , Fu Qiang , Hou Hanfang 
Published: March 2020

Abstract
The layer composite rock mass is composed of soft rock and hard rock. The difference of their mechanical characteristics is obvious. It is difficult to describe comprehensively the complicated property with the existent constitutive model. Based on the rheological properties of soft rock and hard rock in the composite rock mass and the creep experiment curves, the rheological model can be used by connecting Burgers model in series with a plastic component. The rheological curves of the composite model under diverse stress level can be attained by multi-staged loading. The simulated result is proved good by comparing the theory curves and the experiment curves. The rheology principium of the complicated rock mass can be illuminated well by the model so that it could be popularly used in engineering practice.
Evaluation of Air Pollution Control Efficiency in Hebei Province Based on DEA Method
Authors: Xu Qiaochu 
Published: March 2020

Abstract
In this paper, the operation cost, the total investment in environmental infrastructure construction, the exhaust gas treatment facilities are selected as the input variables and the industrial exhaust gas emission, the industrial SO2 removal quantity, the industrial dust removal quantity and the industrial dust removal quantity as output variables of air pollution control. Besides, the efficiency of air pollution was controlled in Hebei province from static and dynamic aspects were measured from 2005 to 2015 by exploiting BC2 model. Finally, according to the analysis results, corresponding policy suggestions are given from different perspectives, including strengthening independent innovation capability, adjusting and optimizing industrial structure, increasing investment in pollution control, optimizing capital source and using structure of pollution control, and constructing reasonable and effective external supervision mechanism.
Will infrastructure construction cause environmental pollution in China?
Authors: Luo Yunyun 
Published: March 2020

Abstract
Whether it is the historical experience of developed countries or the practice of most developing countries, it has been shown that in the stage of national industrialization and infrastructure construction, environmental pollution will accompany it. With the development of the country's industrialization and the improvement of people's awareness of environmental protection, the discharge of pollutants such as industrial wastewater and waste gas has caused people to pay more attention to environmental issues. This article comprehensively analyzes the impact of infrastructure construction on environmental pollution based on data from eastern China in 2009-2017. The research results show that infrastructure construction has a significant impact on environmental pollution in eastern China. Specifically, infrastructure construction has significantly increased the discharge of industrial wastewater and exhaust gas. Therefore, China needs to pay more attention to certain new pollution sources in the process of increasing infrastructure construction. All regions should strengthen cross-regional environmental protection cooperation and focus on green development.
Research on Desulfurization and Denitration Technologies of Ship Exhaust
Authors: Chen Peng 
Published: March 2020

Abstract
Ship exhaust is one of the main sources of air pollution, at present; there are three methods for treating ship exhaust, including desulfurization, denitration, and desulfurization-denitration integration. This paper introduces the mainstream desulfurization and denitration technologies, and the desulfurization-denitration integration technology can achieve the simultaneous removal of multiple pollutants, which will become the main method of ship exhaust treatment in the future and has broad development prospects. This paper introduces some treatment methods and advantages and disadvantages of ship exhaust, and hopes to provide some references for the treatment of ship exhaust.
A New model on evaluating environmental degradation
Authors: Chai Zhaoyuan , Zhang Mingyu , Xing Gaoshan 
Published: March 2020

Abstract
Environmental protection has attracted more and more attention in today’s society. Traditionally, most land use projects do not consider the impact of, or account for changes to, ecosystem services. To better evaluate the environmental degradation, we created an ecological services valuation model. Our EDC-GP Model provides a quantitative analysis of Environmental Degradation in different areas. Then apply it to both large national project and small city-based project.
Effects of insect frass with different cadmium content on maize plant growth and cadmium accumulation
Authors: Cai Ruijie , Wu Xiang , Wang Xiaobo , Xu Xiaoyan 
Published: March 2020

Abstract
In order to explore the effect of cadmium in insect frass on the growth of maize, the pot experiment method was selected to investigate the effects of black soldier fly frass with different cadmium contents (0mg•kg-1,2mg•kg-1,12mg•kg-1,28mg•kg-1) on maize plant height, chlorophyll content, photosynthetic rate and cadmium accumulation in plants. The results showed that there were no difference between treatments for maize plant height. Insect frass with 28 mg•kg-1 cadmium contents improved chlorophyll content and photosynthetic rate at 30th day. Cadmium content in plants and roots increased significantly with increasing of cadmium content in insect frass. The highest Cadmium content of plants and roots were 0.32mg•kg-1 and 1.50mg•kg-1 respectively.
Study on the Adsorption Properties of Different Insect Feces on Cu2+ and Cd2+
Authors: Zhang Mingfu , Tang Zhijuan , Zhao Yi , Wang Xiaobo , Xu Xiaoyan 
Published: March 2020

Abstract
In order to understand the adsorption properties of insect feces on heavy metals, White grubs feces and Black soldier fly larvae (BSFL) feces were selected as the adsorption materials to study the adsorption properties of insect feces on Cu2+ and Cd2+. The results showed that the adsorption effect increased significantly with the increasing of the amount of insect feces, and the best adsorption effect were 2g White grubs feces and 4g BSFL feces in 100ml (10mg/L) Cu2+ and Cd2+. With increasing of concentration Cu2+ and Cd2+ (0-20 mg/L), the adsorption quantity of Cu2+ and Cd2+ increased. Adsorption quantity of BSFL feces for Cu2+ was more than White grubs feces, while for Cd2+ was less than White grubs feces when concentration of Cd2+ was over 10mg/g. With the increase of pH, the adsorption rate of White grubs feces and BSFL feces on Cu2+ and Cd2+ decreased significantly.
Nonlinear Response of a Subsea Tunnel Constructed by Two Tunnelling Methods subjected to Strong Seismic Shaking
Authors: Chen Juntao , Hao Kun , Chen Jiabao , Ma Jianyun 
Published: March 2020

Abstract
In this paper, a three-dimensional numerical model is built to study the seismic response of a subsea tunnel constructed by two tunnelling methods, including the TBM tunneling and drill-and-blast tunneling. In the numerical model, the plastic-damage model is used to simulate the elastic and plastic behaviour of concrete under dynamic loadings. To illustrate the seismic response of the tunnel and yet limit the amount of data included in the paper, the work presented is limited to the deformation of tunnel cross sections and dynamic stress responses. Based on the results, the deformation and stressed of different tunnel sections are discussed. Results show that the amplitude of maximal principal stress occurs at sidewall basement of the inner liner. The spandrel and the sidewall basement are the most precarious area.
Trial Study on Visual Recognition of Cross-channel Indication Signs in Limited-visibility Tunnels
Authors: Yong Pan , Shuai Liu , Jian Zhong Chen 
Published: March 2020

Abstract
For the problem that evacuation personnel cannot find evacuation location and route quickly and accurately when there is a fire in tunnel, by using eye-tracker to record eye data and selecting X-angle and Y-angle space position indicator to research target awareness, and compared and analyzed the visual recognition, orientation and functionality in different cross-channel indicators at different distances for different groups. The trial results showed that cross-channel indicator signs in existing tunnel lack visual recognition and induction. After adding LED-induced flashing signs and evacuation indicator pattern within green and white edges into cross-channel, visual recognition was improved significantly. Evacuation personnel can better evacuate in condition of limited- visibility and unclear direction and can timely find the evacuation location and escape route so that people can improve self-help ability when there is a fire in tunnel.
Monitoring and analyzing the shallow-buried highway tunnel in the soft stratum
Authors: Yang Zhihua , Wang Zhongwei 
Published: March 2020

Abstract
The large deformation is one of the important characteristics of the shallow-buried highway tunnel (SBHT) in weak strata. To analyze the deformation law, the monitoring of ground and vault subsidence of Yunfu Road tunnel under Caiyun North Road in Kunming is carried out. The influence of excavation on the temporal and spatial characteristics of the SBHT in weak strata are elaborated. Based on the monitoring results, the deformation characteristics of the surrounding rock are analyzed. What’s more, some effective measures to control the deformation of surrounding rock in tunnel construction are pointed out, and the basis for the optimization of support system is provided. The research results can guide and used for the construction of the SBHT passing through similar soil strata.
Numerical simulation on ground deformation characteristics during double-line shield tunnel crossing airport runway
Authors: Ding Wenqi , Shao Zhili , Lu Xingbang , Qiao Yafei 
Published: March 2020

Abstract
Using Peck empirical formula and superposition method, the variation of ground settlement, uneven settlement and ground curvature caused by single-line and double-line shield tunnel are obtained. The finite element numerical simulation method is used to analyze the construction process of shield tunnel below the airport runway. Considering the existence of the runway structure and the successive excavation effects of the left and right line, the comparison of simulation and empirical formula is analyzed. Based on this, the deformation Characteristics of the runway is derived under different buried depths and different ground loss ratios.
Research on Influence Zoning of New Tunnels Crossing Existing Urban Roads by Orthogonal Design Considering Horizontal and Longitudinal Effects
Authors: Tian Mingjie , Zhang Jiangbo , Zhao Shun , Li Yuqiong , Mou Zhiheng , Zhang Huijian , Qiu Wenge 
Published: March 2020

Abstract
The influence of this proximity system is essentially within the stress superposition region, the stability of the new tunnel underneath the existing urban road is analyzed by strength reduction method, and the ultimate shear strain is selected as the criterion of instability of surrounding rock. By comparing the single tunnel with the adjacent system of the tunnel to the existing urban road, at a safety factor difference of 0, as a partition threshold of the influence region, the mechanical calculation models of different tunnels near the existing urban roads are established under 192 working conditions. Through multifactor analysis of the calculation results, at the same time, considering that the influence of new tunnel excavation on existing urban roads is mainly longitudinal effect, and the influence of existing urban roads on new tunnels is mainly transverse effect, the influence range diagram of longitudinal and transverse effect is established, which provides reference for similar projects in the future.
Hierarchical coding system of tunnel engineering for highway maintenance informatization
Authors: Han Kunlin , Qin Feng , Pu Duan 
Published: March 2020

Abstract
With the constant promotion of the “comprehensive and accurate” highway maintenance policy, the demand for application of tunnel maintenance informatization is expanding, and the standardization of hierarchical coding for the tunnel engineering is critically urgent. In this paper, the hierarchical informatization and coding system of related industries are analysed firstly, and then the hierarchical coding structure and classification code with high accuracy on the level of structural units and affiliated facilities are designed according to the combination of highway tunnel properties and maintenance characteristics. At last, the modular congruence algorithm is adopted for automatic verification, and a set of hierarchical coding system for highway maintenance information is preliminarily established. Furthermore, the research of the hierarchical coding system application has laid a solid foundation for the whole life cycle maintenance management of highway tunnel.
Research on Risk Assessment of Complex Mountain Tunnels Based on AHP-FCE
Authors: Zheng Changqing , Chen Binke , Li Weiping , Zhang Zhiqiang 
Published: March 2020

Abstract
Complex geological environment and difficulties in operation and maintenance of mountain tunnels result in a lot of damage during the operation period of mountain tunnels. Therefore, the risk assessment and reinforcement technologies for complex mountain tunnels during the operation period need to be developed and improved. As a result, in this paper, the research on safety influence factors and their weights during the operation period of complex mountain tunnels was conducted based on Fuzzy Comprehensive Evaluation (FCE) and Analytic Hierarchy Process (AHP), the fuzzy set of weights for risk influencing factors during the operation period of complex mountain tunnels was established, the membership functions of factors at the index level were determined, the comprehensive evaluation matrix of tunnel risks was obtained, and the fuzzy comprehensive evaluation method for risks of complex mountain tunnels was proposed. This method has been verified in the Jinjishan Tunnel, and its analysis results are credible. In addition, corresponding risk prevention and control measures were put forward based on the evaluation results, and they provided guidance and reference for similar projects.
Lighting environment analysis of Chengdu underground commercial spaces
Authors: Xie Yi , Liao Jixuan , Guo Chun , Zhang Ke , Zhang Jiapeng , Yang Kun 
Published: March 2020

Abstract
In order to learn the current lighting environment of underground commercial space in Chengdu, we selected the Sino-Ocean Taikoo Li Chengdu, Tianfu Square Jinzhan Shopping Center and Diyi Avenue Underground Commercial Street as the research objects and using field test method to investigate the illuminance, lights colour temperature and the road surface luminance. Through contrast test data to analyse the lighting environment, this paper put forward the suggestions such as bring in natural light, adding commercial stores in channels and selecting colour temperature reasonably to enhance the lighting environment of underground shopping malls which only under artificial lighting conditions.