bluuebunny/crossref_metadata_2025_split huggingface dataset:
Discussion on Sampling Methods in Island Vegetation Survey of Species Richness and Biomass
Authors: Zhang Liting , Sun Xinyu , Zhang Ying , Su Jie , Liu Xiangyu , Sun Jiawei 
Published: March 2020

Abstract
Vegetation is an important part of island ecosystem. Due to the distinction of vegetation from mainland vegetation, the existing mainland sampling method cannot be entirely applied to the islands. Hence it is necessary to combine the existing mainland vegetation sampling methods, and to select different types of islands to test the key links of the methods, and to accumulate data for statistical analysis, so as to obtain the technical methods suitable for island vegetation sampling. Aiming at the application of quadrat method in island vegetation survey, this paper chooses two different survey areas of North Changshan Island as examples, compares different quadrat setting methods, clarifies how to set the quadrat in different kind of slope direction, slope position, and types of plant communities, how much the number of quadrat, and how much the area of quadrat can be set in order to represent the island more completely. Finally, the optimal principle of setting up the island quadrat is determined, which provides scientific basis for the effective selection of the quadrat setting in the investigation of island vegetation community.
Study on the Effective Method of Optimizing PCR-DGGE by adding PCR enhancers
Authors: Zhao Jirui , Wang Shuang , Wei Daiyan , Chen Xiaoming , Xu Yuan , Zhao Wei , Ma Nan , Zhan Xianhui , Jia Xiuyan , Sun Meng , Liu Jiahong 
Published: March 2020

Abstract
PCR-based denaturing gradient gel electronic (PCR-DGGE) has become a frequently used method in the determination of bacteria community in water, soil and other habitats. However, the precision and the integrality of microbiology community by this approach should be reinforced and the key for this is optimization on PCR for which is the basis of PCR-DGGE. Aiming at this, PCR enhancer combinations were applied in both two amplification rounds of PCR-DGGE in this study. The results showed that many new bands were produced and originally weak bands were intensified after the addition of PCR enhancer combinations, particularly DBD-2 (1% DMSO, 0.4 M Betaine, 1mM DTT) in PCR amplification buffer system. Virtually all newly appeared bands in DGGE were probably derived from the bacteria with high GC% content (60%). Thus the major optimization on PCR-DGGE was PCR enhancer may contribute to decreasing annealing temperature and improving the PCR product yields of the high-GC%-contented bacteria. In conclusion, PCR enhancers could remarkably improve the amplification efficacy, particularly for using the complex and tiny environmental DNA or weaker bands from DGGE as PCR template, and furthermore increase the detected bacterial species in PCR-DGGE. Therefore we strongly proposed that the PCR enhancer combination be routinely applied in PCR-DGGE for the bacterial community determination.
Biogenic Isoprene Emissions and Temporal and Spatial Distribution Characteristics in Tianjin
Authors: Li Jing , Liu Maohui , Liu Jiahong , Yue Yayun , Sun Meng 
Published: March 2020

Abstract
Based on the localized improved GLOBEIS model, the total amount of biogenic isoprene emissions in Tianjin in 2018 was estimated and the temporal and spatial distribution characteristics were analysed by using the land-use type data interpreted from remote sensing images and the observed hourly meteorological data. The results show that the total amount of biogenic isoprene emission in Tianjin reached 694 t (calculated by C, the same below) in 2018, and the emission intensity was 0.06 t/km2/a. The diurnal, monthly and seasonal variations of biogenic isoprene emissions are obvious: High at noon and low at night; Highest in August and lowest in January; Emissions in summer are the largest while the smallest in winter. The spatial characteristics are closely related to land-use types, and the emissions of biogenic isoprene are mainly concentrated in the forest areas, and the emissions are small in the Urban districts of the city and Binhai New District. Finally, the uncertainty sources of biogenic isoprene emission estimation were analysed.
Experimental Study on Optimized Adjustment of Ammonia Spraying in 300MW Unit
Authors: Liu Bo , Zhang Peng , Li Sha , Wei Hongge , Zhu Yue 
Published: March 2020

Abstract
The experimental study on the optimization of ammonia injection in the denitration system of a 300MW coal-fired unit in a power plant. Under the premise of meeting the ultra-low emission standards of environmental protection requirements, the ammonia injection amount of the denitration device can be reasonably adjusted by adjusting the opening degree of the manual ammonia valve. It significantly improves the uniformity of the NOx concentration distribution in the denitration system. It eliminates local ammonia slip peaks and reduces ammonia slip rate. The deviation of the NOx concentration distribution at the outlet of the denitration system decreased by 70.1% and 46.7%, respectively. The ammonia slip concentration decreased by an average of 0.80 mg/m3 and 1.05 mg/m3. Ammonia consumption decreased by 8 kg/h and 15 kg/h, respectively.
Design of PM2.5 Air Quality Detection System based on Median Value Average Filtering Algorithm and OLED Screen
Authors: Zhang Xinwei , Zhang Longqing , Gong Shu , Tian Liwei , Zhang Yanghong , Yang Lei , Jia Zhongning 
Published: March 2020

Abstract
Environmental pollution problems are becoming more and more serious, air pollution and air quality problems, has become a hot spot of special concern. PM2.5 is an important indicator of air quality testing .This design uses GP2Y1010AUOF dust sensor,SHT20 temperature and humidity sensor and so on, transmit the signal to ATMEGA328PAUM SCM. The system detects the detection through the analog to digital conversion and median value average filtering algorithm. The PM2.5 Concentration values are displayed to OLED screen, alert if the detection value exceeds the standard. Experiments show that the system is running well, with a measurement accuracy of 4.8%, and has a certain stability and practicality.
Analysis of factors affecting carbon emissions in Tianjin
Authors: Zhao Xuan 
Published: March 2020

Abstract
According to the IPCC carbon emission calculation method, Tianjin's carbon emissions were calculated from 2000 to 2017, and the main factors affecting carbon emissions were analyzed and studied using the LMDI model system. The results show that Tianjin’s energy consumption carbon emissions continued to increase from 2000 to 2017, and have declined significantly in recent years. Among the carbon emissions of energy consumption, coal produced the most carbon emissions, followed by crude oil and coke; Among the factors that affect Tianjin’s carbon emissions from 1997 to 2017, economic development has the largest positive effect, and energy consumption intensity has the largest negative effect; Tianjin’s energy consumption is unreasonable, and it mainly depends on coal, crude oil and other energy sources.
Characteristics of chlorpyrifos removal and microbial community analysis for constructed wetlands systems
Authors: Zhao Jing , Zhua Weihong , Wang Yanji , Jin Mingji 
Published: March 2020

Abstract
The mechanisms of chlorpyrifos removal from constructed wetland systems were determined using different initial concentrations of chlorpyrifos. The microbial community structure in the wetland system was analyzed using high-throughput sequencing technology. The results showed that, in the wetland system, the removal of chlorpyrifos was accomplished by combined substrate adsorption, plant absorption, and microbial degradation. However, there were significant differences in the removal of chlorpyrifos by substrate, plants, and microbes when different initial concentrations of chlorpyrifos were used, and with different wetland systems. High-throughput sequencing results showed that there was a negative correlation between the microbial community richness in late operation of wetland systems and the initial concentration of chlorpyrifos. In the wetland systems, Proteobacteria and Acidobacteria were the predominant bacterial phyla that conducted the removal of chlorpyrifos.
Discussion on Shanghai Water Treatment Plan
Authors: Gao Jingwen 
Published: March 2020

Abstract
Water is one of the most important resources in production and life, and water pollution will break the ecological balance within water and thus threaten human life and production, and even human health. At present, water treatment methods and technology are attracting attention around the world. Shanghai is the earliest Chinese city to set up modern drainage facilities, which has accumulated rich and valuable experience in water treatment. Therefore, this study takes Shanghai as the research area, summarizes sewage treatment technologies used here, and analyzes the advantages and drawbacks of these technologies. It is hoped that this research can provide a theoretical basis for the sustainable development of China’s sewage treatment technology.
Innovative Application of Electrical Automation Technology in Power Dispatching under the Environment of Energy Saving and Emission Reduction
Authors: Meng Mingchuan , Zhang Wei 
Published: March 2020

AbstractScience and technology have developed rapidly recently, more and more automation technologies are applied to the production and life links, which provides a lot of help for social development and economic progress. In the power system, the power of the substation can be reasonably dispatched through the automatic control technology to reduce manual intervention and improve work efficiency. The use of power transfer automation technology can not only be more orderly and convenient to dispatch and manage, but also significantly improve the efficiency of power dispatching. It is an important technology for the development of the current power industry. This paper expounds the characteristics of power transmission automation technology, analyzes the innovative application of power transmission automation, and puts forward the trend of power dispatch automation, in order to better promote the development of China's electric power industry.
Effect of influent COD and TN on ship sewage treatment by using an aerobic-anaerobic membrane bioreactor (O/A-MBR)
Authors: Zhang Kun , Wang Yiquan , Cai Yuhang , Sun Peiqi , Li Jianing , Wang Gaoshuai , Shi Yue 
Published: March 2020

Abstract
The implementation of the latest International Maritime Organization (IMO) emission standards places stringent requirements on ship domestic wastewater discharges. In this study, an aerobic-anaerobic membrane bioreactor (O/A-MBR) was used to investigate the effect of influent COD and TN on ship sewage treatment. The results show that the lower volume load will affect the growth of the organism, and then affect the removal efficiency of COD. The increase of volume load is beneficial to the removal of COD, but the relatively high load will affect the removal of TN. Throughout the process, the O/A-MBR reached high COD and TN removal efficiencies with average values of 87.46% and 85.83%, respectively, and the best volume load range is obtained based on this experiment. It indicates that the novel MBR leads to good pollutants degradation effort and has great potential in practical ship domestic sewage treatment.
Analysis on Flue Gas Pollution of Coal-fired Boiler and Its Countermeasures
Authors: Bian Hao 
Published: March 2020

Abstract
As the main energy in industrial production, coal resources are widely used in the world. However, in the process of coal combustion will produce a certain amount of pollutants, thus causing adverse effects on the air. The analysis of flue gas treatment of coal-fired boiler aims at improving coal utilization rate, reducing flue gas emission and advocating low-carbon concept. This paper deeply analyzes the flue gas problem of coal-fired boiler, explores the effective environmental treatment technology, and makes contribution to the environmental treatment problem.
Calculation of active earth pressure against retaining walls under translation mode considering soil arching effect in cohesive soil
Authors: Du Zhengjiang 
Published: March 2020

Abstract
In this study, the contour of the soil arch is not assumed as a certain curve, and the soil stress analysis is conducted on a differential element with two dimensions. Herein, analytical expressions of the active earth pressure, active earth force are derived based on the static equilibrium of the differential element. Furthermore, the effects of wall-soil friction angle and soil internal friction angle on the active earth pressure are investigated. Eventually, comparisons among the proposed method of this study and the previous measured data and other analytical approaches yield satisfactory results.
Research on surface temperature inversion and spatiotemporal distribution characteristics based on Landsat data
Authors: Wu Shuang , Zhang Chao , Yang Zhen , Rong Yanni , Wang Yuxia 
Published: March 2020

Abstract
With the rapid development of urban scale and the rapid expansion of urban population, the urban heat island effect caused by the rapid increase of urban anthropogenic heat emissions has gradually become an important factor that seriously affects urban living environment and residents' health. This study uses the Landsat TM5 and Landsat 8OLI_TIRS remote sensing data from 2000, 2006, 2013 and 2018 to calculate the surface temperature of the main urban area of Jinan, and the spatial distribution characteristics and thermal environment of the heat island in the main urban area of Jinan. Quantitative research on the relationship with natural vegetation, provide some data support for alleviating the urban heat island phenomenon in Jinan, promote ecological environment construction, and make scientific and rational planning for the future urban development of Jinan City.
Experimental study on the temperature uniformity of radiator based on micro heat pipe array in plateau area
Authors: Wan Li , Pu Zewei 
Published: March 2020

Abstract
In order to study and analyze the surface temperature uniformity of micro heat pipe array radiator, through comparative experiments, we found that: When the water supply flow is 1600 L/h, and the water supply temperature is 65 °C to 85 °C, the temperature difference between the head end and the end of the array radiator filled with R141b in the horizontal direction is only 1.9 ~ 2.1°C,the temperature drop ratio in the vertical direction is only reduced from 1.3% to 0.9%; The temperature drop ratio of the first end and the end of acetone filling is 4.2% to 2.5%,the temperature drop ratio in the vertical direction is 3.2% to 1%; The temperature drop ratio of the head end and the end of the copper aluminum composite radiator is 36.5% to 20.9%,the temperature drop ratio in the vertical direction is 9.5% to 1.2%. When the water supply temperature is 75 °C, the water supply flow is 1050L/h to 2200L/h, the maximum temperature drop ratio of the head end and the end of the micro heat pipe array radiator is only reduced from 3.4% to 2.6%,the temperature drop ratio in the vertical direction is only reduced from 0.8% to 0.6%; The temperature drop ratio of the head end and the end of the copper aluminum composite radiator decreased from 35.1% to 19.4%, the temperature drop ratio in the vertical direction decreased from 5.7% to 1.5%. Therefore, the temperature uniformity of the micro heat pipe array radiator in the horizontal and vertical directions is better than the existing copper aluminum composite radiator.
Preliminary investigation on Cladocera and Copepoda in summer and autumn in Baiyangdian Lake, China
Authors: Cui Tiefeng , Li Zizhu , Liao Chenyan , Cao Zhihan , Sun Xiaoqiong , Cui Tongtong , Li Hongchang , Li Haichao , Wang Hongwei 
Published: March 2020

Abstract
In July and October of 2018, a survey of plankton resources was conducted in Baiyangdian Lake. There were 8 species of cladocerans and 5 species of copepods were identified. The water quality and aquatic resources of Baiyangdian Lake were preliminarily grasped, and some advice was given on how to protect aquatic living resources and water ecological environment in Baiyangdian Lake.
Study on the preparation of high content non-sintered brick with sludge
Authors: Ren Xiaoli , Ren Zihan , Lei Juan , Jin Yuqiang , Yin Hongbing , Xu Defei 
Published: March 2020

Abstract
The aim of this study is to prepare non-sintered bricks using the chemical sludge as raw materials, so as to realize the recycling disposal of the sludge. Through the orthogonal experiment of five factors and four levels, the influence of five different factors and their levels on the compressive strength of non-sintered sludge test blocks was investigated. The results showed that the optimal combination of orthogonal experiment is A4B1C4D2E3, the compressive strength reaches the maximum value of 24.29MPa; Through the analysis of the range, it was found that factor C had the greatest effect on the compressive strength, followed by the cement (P.O 32.5), hydrophobic agents and re-dispersible emulsion powder, the crack resistant fibre had the least effect. Considering the cost and R analysis, the combination of factors was adjusted as A3B1C4D2E1, and three verification experiments were conducted, the average compressive strength was 23.57MPa.
Partial nitritation and anaerobic ammonium oxidation in biofilter reactors treating low ammonium strength wastewater
Authors: Chen Jiao , Lu Yixin , Tang Li , Huang Wen , Li Yangtao 
Published: March 2020

Abstract
Partial nitritation (PN) and anaerobic ammonium oxidation (ANAMMOX) were applied in biofilter reactors to treat low ammonium strength wastewater. The removal efficiency and contribution of PN-ANAMMOX process to CODcr, BOD5, NH3-N, TN and TP were investigated. The results showed that the average removal rates of CODcr, BOD5, NH3-N, TN and TP via PN-ANAMMOX process were 91.9%, 96.7%, 98.9%, 92.8% and 93.3% respectively when hydraulic load was 1.0 m/d. The effluent CODcr, BOD5, NH3-N, TN and TP concentrations were lower than 13.8, 4.8, 0.76, 4.4 and 0.28 mg/L, respectively. The PN-ANAMMOX process showed high efficiency and stability in removing C, N and P pollutants from wastewater. PN reactor played a major role in the removal of CODcr, BOD5, NH3-N and TP. ANAMMOX reactor played a leading role in TN removal.
In-situ Tests and Analysis for Droplet Size Distribution on the Clean Flue of Coal-fired Power Plant
Authors: Li Zonghui , Cao Wenguang , Liu Xiu , Chen Jun , Duan Cuijia 
Published: March 2020

Abstract
The clean flue gas after FGD of coal-fired power plant is taken as the analysis object, and the particle size analysis for droplets under complex conditions is studied. Selected 600MW unit is typical enough, the particle size range is mainly between 3 and 20 μm. The test will provide the first-hand data for the removal of fine droplets.
Research and application of carbon footprint correction method in construction of new building evaluation model
Authors: Bi Xiaoqing , Jiang Zhendong 
Published: March 2020

Abstract
This article cites a carbon footprint correction method and uses it to build an evaluation model for new buildings. By introducing a carbon footprint correction method, the goal is to build a high-efficiency, low-energy consumption evaluation model for new buildings. Comprehensively consider 15 indicators of 4 dimensions, including residential environment, energy efficiency and carbon footprint, then calculate the weight of each indicator and assign value analysis to it, and construct the evaluation model of the new building, and finally use the deviation rate of the carbon footprint to modify the evaluation level. This research can provide a usable evaluation model for the construction of new buildings, so as to scientifically and reasonably guide the planning and construction of new buildings with high efficiency and low energy consumption.
Research on Air Pollution Control Status and Air Governance of "2 + 26" Cities
Authors: Lang Jiankang 
Published: March 2020

Abstract
"2 + 26" cities have been the focus areas for air pollution control in recent years. Encouraged and guided by national policies, they have brought tremendous development opportunities to the development of the atmospheric environmental protection industry. Air pollution has great harm to human health, industrial and agricultural production, and atmospheric climate. "2 + 26" cities play an important role in the country, and their air pollution control is urgent. Based on the "2 + 26" cities, this paper analyzes the pollution status and management prospects of the "2 + 26" cities with data. In addition, we put forward corresponding countermeasures based on the "2 + 26" urban pollution status, and provide a reference for relevant departments to carry out air pollution control.
KI-MIBK extraction flame atomic absorption spectrophotometry for determination of cadmium in soil of Jining area
Authors: Wei Yin , Gao Fan , Gong Weilei , Zhang Kai 
Published: March 2020

Abstract
The collected soil samples of Jining area were subjected to microwave digestion (HNO3 + HF + H2O2), and the absorbance of the organic phase MIBK was determined by flame atomic absorption spectrophotometry after extraction with KI-MIBK. Results According to the measured results, within 20 meters, the content of cadmium increased gradually with increasing distance, and gradually decreased with increasing distance after 20 meters. The content of cadmium in the soil shows a clear change trend due to the distance from the source of pollution. Based on this change, favorable conditions suitable for crop growth can be created.
Temporal and Spatial Distribution Characteristics of PM2.5 Concentration in Tianjin and Simulation Analysis of Sources of Heavy Pollution Process
Authors: Xia Weibing 
Published: March 2020

Abstract
In Tianjin, there are many heavy pollution events with PM2.5 as the primary pollutant. It is clear that the spatial and temporal distribution of PM2.5 concentration and the source of heavy pollution process have far-reaching significance for the comprehensive management of PM2.5. Using Tianjin's environmental data for 2014-2017 and in 2016, meteorological data, combined with WRF-Chem model, studied the spatial and temporal distribution characteristics of PM2.5 concentration in Tianjin and the source of heavy pollution process. The results show that since 2014, the concentration of PM2.5 in Tianjin has been decreasing year by year. The monthly variation curve of PM2.5 concentration showed a “U”-shaped distribution, which was seasonal in winter and spring, and low in autumn and summer. The daily variation of PM2.5 concentration is bimodal, with the main peak appearing at 08:00-09:00 and the second peak occurring at 21:00-00:00. The spatial distribution of PM2.5 concentration in Tianjin is different in each season. The spring, summer, autumn and winter highvalue centers are located in Jinghai District in the southwest of Tianjin, Beichen District in the north of the central city, Wuqing District in the west and Yinzhou District in the north. The source of pollutants in the autumn and winter seasons of Tianjin simulated by WRF-Chem model showed that the local source contribution rate was 56%, and the external source transportation contribution rate was 44%, including transportation in Hebei Province and Shandong Province.