bluuebunny/crossref_metadata_2025_split huggingface dataset:
Spatial distribution of heavy metals in soil around municipal solid waste incinerators at coastal plain and inland mountainous region in China
Authors: Zhong Shan , Wei Zengxian , Zhang Lishan , Lei Chengqi , Gao Hui , Feng Jingkun , Suna Liwen 
Published: December 2019

Abstract
Heavy metals released from incinerator stacks are considered as the potential sources in soils surrounding the MSWI plants. In this work, heavy metals in soils sampled at different sites around the two MSWI plants with different landforms and weather conditions, namely, windy coastal plain region in Eastern China and calm inland mountainous area in Western China, were investigated. The average concentrations of Cr, Mn, Fe, Cu, Zn and Pb in soils at the coastal plain region were 274.21, 1053.47, 58755.9, 37.38, 90.60 and 40.53 mg/kg, in comparison with those of 224.0, 658.99, 39960.3, 31.72, 33.91 and 70.98 mg/kg in soils at the inland mountain region, respectively. Principal component analysis showed that Mn and Fe were presentd as background origin in soils surrounding both the incinerators. Cu, Zn and Pb distributions in the two studied regions were influenced by human activities. The application of pesticides contributed to Cu and Zn contaminations in soils surrounding the coast plain incinerator. Furthermore, the application of pesticides and local traffic had impacts on Cu distributions in soils surrounding the inland mountain incineration plant. The study highlighted that Pb was an important environmental indicator of MSWI air contamination. The source identification and spatial distributions of Pb indicated that the extent of soil contamination by heavy metals in the vicinity of a MSWI was highly ascribed to the stack emission. Furthermore, the terrain and meteorological conditions had a significant effect on heavy metal pollution distributions.
Hg Content Sedimented at Bottom Layer of Eastern Nearshore Waters
Authors: Yang Dongfang , Su Chunhua , Zhu Sixi , Wang Xiaodan , Wu Yunjie 
Published: December 2019

Abstract
According to the investigation data of Jiaozhou Bay in 1991, the Hg content and horizontal distribution at bottom layer were studied. The results showed that the variation range of Hg content was 0.011-0.054μg/L, which satisfies the Case I and II Sea Water Quality Standard. Therefore, in May, August and October, the bottom layer from bay center to southern bay mouth was mildly polluted or not polluted by Hg content. In May and August, the bottom layer of eastern nearshore waters was mildly polluted by Hg content, and in May, August and October, other areas were not polluted by Hg content. There was high sediment of Hg content in eastern nearshore waters. In other words, Hg content first reached the surface waters, and then sedimented to bottom layer of eastern nearshore waters.
The Controlled Mechanism of Hg Content Varying at Surface and Bottom
Authors: Yang Dongfang , Ren Haoyuan , Yang Dong , Zhang Longlei , Li Haixia 
Published: December 2019

Abstract
By the investigation dataset of Jiaozhou Bay in 1991, the vertical distribution and seasonal variation of Hg content at surface and bottom from bay center to northern bay mouth was studied, and seasonal distribution, variation externt and horizontal distribution trend of Hg content at surface and bottom were determined. The results showed that in May and August, the variation of Hg content at surface and bottom from bay center to eastern nearshore waters was 0.016-0.081μg/L, showing that the water quality was mildly or not polluted by Hg. From May to August, in bay center, Hg content at surface and bottom was low in spring and high in summer; in eastern nearshore waters, Hg content at surface was high in spring and low in summer, whereas, Hg content at bottom was low in spring and high in summer. The seasonal variation-controlled mechanism of Hg content indicated that Hg content at surface was not controlled by season, but source transport, and Hg content at bottom was not controlled by season, but cumulative and disputed effect of Hg content reaching seafloor. Therefore, from bay center to eastern nearshore waters, the horizontal distribution trend of Hg content at surface and bottom was consistent in May and contrary in August, which unveiled that at bottom, if without the cumulative matter content, the gravity feature of Hg content determined the consistent horizontal distribution trend of matter content at surface and bottom. In other words, in any waters, at any time, by different sources, the horizontal distribution trend of Hg content at surface and bottom was consistent.
Research on the diversity of Mentha dahurica Fisch. ex Benth. of the Xiaoxing’an Mountains area in Heilongjiang province
Authors: Zhang Yuehua , Wang Xue , Miao Tianlin , Wang Changbao 
Published: December 2019

Abstract
The purpose of this study was to investigate the current status and distribution of Mentha dahurica Fisch. ex Benth. resources in Xiaoxing’an Mountains area, and to provide reference for the rational development and protection of Mentha dahurica. The collection and identification of Mentha dahurica in Xiaoxing’an Mountains area were carried out based on field investigation and literature review. 30 species of Mentha dahurica in Xiaoxing’an Mountains area were obtained, and 65 trees were initially identified. Mentha dahurica in Xiaoxing’an Mountains area mostly distribute in grassland and shrub, followed by broad-leaved forest, while Mentha dahurica are relatively rare in mixed forest and coniferous forest. Mentha dahurica in Xiaoxing’an Mountains area are rich in resources and have good prospects for development and application.
The Driving Effects of Forest Industry in China: An Input-Output Analysis
Authors: Qin Guangyuan , Liu Xuying , Cheng Baodong 
Published: December 2019

Abstract
This paper analyses Chinese forest industry’s significance and its driving effects with the 2007’ input-output statement and the 2008’ national economic census data; and concludes that forest industry itself created GDP 330 billion RMB, while driving the GDP increase by 270 million RMB, showing an obvious driving effect. Especially the paper making industry contributed most; The industry created 4.6 million jobs, while driving the job increase by 25 million, demonstrating forest industry’s job-creating capacity and its labour-intensive characteristics. The timber processing sector particularly created 2.4 million jobs, while driving the job increase by 10 million; Forest industry drove profit increase by 520 billion RMB, of which timber processing and paper making sectors contributed significantly; The whole industry drove the wage and welfare distribution up by 460 billion RMB, of which furniture manufacturing sector accounted for the largest share with 190 billion RMB, demonstrating forest industry’s important status among all sectors and significant driving effect on economy.
Starch wastewater treatment technology
Authors: Cai Tongbo , Lin Hua , Liu Zhaojun , Chen Kaiwei , Lin Yi , Xi Yuan , Chhuond Kong 
Published: December 2019

Abstract
Several methods of starch wastewater treatment in recent years, including physical method, physical-chemical process, biological method and combined process method, were reviewed. The advantages and disadvantages of these methods are analyzed, and the development and research direction of these methods are prospected.
Study on the viscosity reduction experiment of stimulation wastewater in oilfield
Authors: Tong Xiao , Li Yan , Liu Ning , Ren Xiaorong 
Published: December 2019

Abstract
The stimulation wastewater is a kind of re-discharge wastewater produced by various operational measures according to the production needs, it has high viscosity and is difficult to treat. Based on the analysis of the viscosity characteristics of stimulation wastewater, the viscosity reduction experiments were carried out to evaluate the viscosity reduction effects of two measures. The experimental results show that the natural static viscosity reduction is easy and does not need to consume treatment agent. In the rapid viscosity reduction method, the organic structure can be destroyed by adjusting the pH value or adding oxidizing substances to meet the requirements of viscosity reduction. Among them, ozone has the advantages of fast viscosity reduction, good effect, appropriate amount of hydrogen peroxide, which can strengthen the viscosity reduction in wastewater and shorten the time of natural viscosity reduction. In summary, if enough time is available, static viscosity reduction is the appropriate method; if conditions are not available, natural static viscosity reduction and oxidative viscosity reduction are combined. Hydrogen peroxide is the preferred fast viscosity reducer, which can ensure the effect of viscosity reduction.
Research on Animal Corridor Setting in Desert and Gobi Area
Authors: Zhou Gang , Shao Shegang , Wu Xiaomin , Zhu Yufeng , Zhang Hongfeng , Wang Zhaoming 
Published: December 2019

Abstract
This paper, the authors take the design of wildlife corridor from Mingshui to Hami section of national expressway from Beijing to Urumqi as an example. The types, living habits and activity rules of local wildlife are analysed. The distribution of vegetation and water source along the highway was investigated, and the distribution of water source was taken as an important basis for the location selection of animal corridor. Considering the dry climate and strong wind along the route, the type of animal corridor is determined to be the underpass. Comparing with the utilization effect of Equus hemionus corridor on Qinghai-Tibet railway, the requirement that the clearance height of Mongolian wild donkey passage at Mingha high speed is more than 3.5 meters is put forward.
A Preliminary Study on Tidal Level and Water Increase during Typical Recurrence Period in Zhoushan City
Authors: Liang Yingyu , Chen Bingrui , Zhang Bei , Xu Lili 
Published: December 2019

Abstract
By using numerical simulation and taking Zhoushan City as the research area, this paper conducts station analysis and field analysis of tidal level and water increase based on long-term tidal data of Dinghai and Shengshan tide stations, with the purpose to prevent and reduce storm surge disasters that influence the marine and terrestrial environment. The results show that Dinghai Station is more greatly influenced by Typhoon 1509, and its water increase based on the 26-years series is significantly larger than that based on the 20-years series. Longer time series, taking more comprehensive situations into consideration, makes the results more credible. It also suggests that more reasonable situations shall be taken into consideration, so that we can get more reliable storm surge recurrence period analysis.
Biosorptive removal of divalent lead ions in wastewater by Elodea canadensis
Authors: Yi Zhengji , Liu Jian , Liu Xing , Zeng Rongying , Cui Ying 
Published: December 2019

Abstract
The purpose of this investigation was to explore the feasibility of utilizing heat inactivated (killed) Elodea canadensis to eliminate divalent lead ions from water solution via batch tests. The Pb(II) biosorption features of E. canadensis biomass were examined with regard to adsorption time, solution pH value and Pb(II) concentration. Our experimental result suggested that the lead biosorption depended highly on medium pH. A pH of 5.0 is most beneficial to lead removal. The biosorption data agreed with pseudo-second-order kinetic model with an adsorption equilibrium time of 60 minutes. Isotherm data agreed with Langmuir isotherm equation with 21.36 mg/g of maximum biosorption capacity. The results suggested that E. canadensis is an inexpensive and efficient sorbent for the elimination of Pb(II) from wastewater.
Effects of melatonin on the sugar metabolism and antioxidative response to excess nitrate stress in lettuce seedlings
Authors: Zhou Xiaoting , Zhang Yao , Deng Jimei , Jiang Zhongli , He Zhongqun , Zou Zhirong 
Published: December 2019

Abstract
Water and soil pollution by nitrate has caused severe impact to environment, especially the inhibition of plant growth due to the excess nitrate stress. Although previous studies reported the melatonin could mitigate injury of plants in response to excess nitrate stress, the alleviation mechanism of melatonin is still unclear. In this study, lettuce seedlings were used as materials, and the main sugar content, sucrose synthesis and metabolism related enzymes as well as ROS metabolism were investigated. There were dramatic changes in sucrose, glucose and fructose content under excess nitrate stress. Exogenous melatonin further increased the sugar content mentioned above, and melatonin increased some sucrose synthesis and metabolism related enzymes under excess nitrate stress, including sucrose phosphate synthase and acid invertase, enhancing sucrose synthesis and metabolism ability. In addition, the content of malondialdehyde and hydrogen peroxide was increased by excess nitrate stress, while inhibited at presence of melatonin. The activities of SOD and POD were also increased by exogenous melatonin in response to excess nitrate stress. In a conclusion, it is suggested that there is a cross-talk between sugar and ROS scavenging pathway under excess nitrate stress, which is enhanced by melatonin, thus promoting the lettuce plants resistance to stress.
Study on Interference Factors of Light Scattering PM2.5 Dust Test Instrument
Authors: Fang Yiming , Li Qi , Chen Zhemin , Tu Yanbo 
Published: December 2019

Abstract
Light scattering PM2.5 dust test instrument is widely used, but it is susceptible to many kinds of interference, and will produce large deviation in some industrial sites. The influence of particle size, relative humidity and other parameters on the measurement results of light scattering dust meter is studied and corrected. The experimental results show that the relative error of detecting single particle size dust is smaller than that of detecting multi-particle size dust. Relative humidity has no effect on non-hygroscopic dust detection, but has obvious influence on hygroscopic dust detection, and the relative error after correction is significantly reduced.
Comparative Analysis of Chromosome Karyotype of Three Varieties of the Characteristic Tea plants
Authors: Jin Zhen , Sun Bo , Huang Jiacheng , Tan Liqiang , Tang Qian 
Published: December 2019

Abstract
ZY, HYZ and CH-1 are three characteristic tea varieties with different shoot colors. However, there is a lack of karyotype analysis of these characteristic tea varieties. In this experiment, the differences of cytological parameters of three characteristic tea varieties, and the control variety FDDB, were analyzed. The results showed that significant differences of the average arm ratio, relative length, karyotype asymmetry index and the karyotype formula were found among the three characteristic tea varieties as well as the control variety FDDB. Moreover, only ZY’s karyotype type was 2B, while the three other varieties all were 2C. Among them, HYZ was the most evolved and closed to FDDB, while CH-1 and ZY were very different from FDDB and evolved more primitive than HYZ. HYZ was the most evolved, and ZY was relatively primitive. PCA analysis indicated that the notable differences were found between FDDB and two characteristic tea varieties (ZY and CH-1), while HYZ is relatively close to FDDB. This findings revealed the variation of chromosomes among different color varieties at the cytological level, and provided a certain theoretical basis for the study of genetic variation and diversity of tea resources.
Analysis of glucosinolates in ‘Nainaiqingcai’ mustard under the alpine cold climate
Authors: Lin Peixing , Zhang Fen , Ma Jie , Qu Wen , Wu Rui , Chen Chunyan , Ma Wei , He Yuankuan , Zhou Ping , Sun Bo 
Published: December 2019

Abstract
The composition and content of glucosinolates were investigated in ‘Nainaiqingcai’ mustard to reveal the diversity of the glucosinolates among the individual edible parts (leaves, petioles, and bolting stems). The results showed the significant differences of the composition and content of glucosinolates were found in the different edible parts of ‘Nainaiqingcai’ mustard. Eleven glucosinolates were detected in leaves of ‘Nainaiqingcai’ mustard, including six aliphatic glucosinolates, four indole glucosinolates and one aromatic glucosinolate. Only ten of the eleven glucosinolates were detected in petioles and bolting stems of ‘Nainaiqingcai’ mustard. The highest contents of glucosinolates in ‘Nainaiqingcai’ mustard was found in leaves. Aliphatic glucosinolates were predominant in the ‘Nainaiqingcai’ mustard, followed by indole and aromatic glucosinolates. Sinigrin was the predominant glucosinolate in the ‘Nainaiqingcai’ mustard. In summary, these findings provide a theoretical reference for the scientific consumption and a foundation for the further study of ‘Nainaiqingcai’ mustard in the future.
Research on rapid semi-quantitative determination of copper in pyrotechnics
Authors: Wu Jun-yi 
Published: December 2019

Abstract
This study discloses a method for rapid semi-quantitative determination of copper in pyrotechnic powder for fireworks and firecrackers based on energy dispersive X-ray fluorescence spectrometer (EDXRF), including the following steps: preparation of samples, establishment of testing methods, determination of the characteristic line fluorescence intensity values of Cu element in samples, and according to the measured fluorescence intensity values, the copper content in the pyrotechnic powder samples can be semi-quantitatively determined. The method of the study has the advantages that: (1) the method is simple to operate, and the method can be repeatedly called for testing. Only one new test method needs to be built before the sample test. After the method is established, the test can be repeated at different times without re-establishing the test method for each test. After the first establishment of the new test method, the entire test process only includes three steps: sample preparation, sample loading into the sample cup and on-board testing. (2) The detection period is extremely short. After the sample is prepared, the entire measurement process takes only about 2 minutes. (3) Labor intensity is very low and the requirements for operators are not high. (4) The method has good stability, good repeatability and high credibility.
Study on Phase Transformation Behavior in Continuous Cooling Process
Authors: Wu Jian , Bao Li , Gu Yu , li Qi 
Published: December 2019

Abstract
The continuous cooling transition curve (CCT curve) system expresses the influence of cooling rate on the starting point of transition, transformation rate and microstructure are studied. In order to obtain desired microstructures and properties, the appropriate process parameters can be selected according to the continuous cooling transition curve. The CCT curve is very similar to the actual production conditions, so it is of great significance for studying the process of hot stamping of experimental steel.
Cause Analysis of Superheater Tube Cracking in Medium Temperature Separated Circulating Fluidized Bed Boiler
Authors: Zhao Ming , Yao Xingjun 
Published: December 2019

Abstract
After running 41808 hours, the superheater tube of a medium temperature separated circulating fluidized bed boiler in a plant cracked. The tube is swollen and thick-lip-shape fracture is covered with oxides. By utilizing energy dispersive spectrometer(EDS), transmission electron microscopy(TEM), optical microscopy(OM), scanning electron microscopy(SEM), ANSYS, and other methods to detect the tube, it is found that the element content of the tube conforms to the standard. In terms of the shape of the fracture morphology, it is transcrystalline rupture, along with dimple and pores in the grain boundary. The carbides gather and grow at the grain boundaries, and the morphology of tempered sorbite is not obvious. By thermal field and stress analysis, the tube stressed runs in super-temperature environment. The tensile strength of the failed tube is not up to the standard. In all, the failure reason of superheater tube is high temperature creep cracking which is caused by the tube is not up to the T91 steel standard and long-term overheating resulted from the oxide layer.
Study the sealing pore technique of the nearly horizontal gas drainage hole in-seam
Authors: Wang Song 
Published: December 2019

Abstract
Through analyzing the influencing factors of hole sealing effect, the “eccentric drilling-pressure grouting” sealing pore technique was put forward, and was practiced in Yonghong coal mine. By contrasting its effect and, and verifying its reasonableness, the gas concentration in the drainaging pipelines was improved.
Statistics investigation of mechanical parameter of rock based on Bayesian reliability theory
Authors: Wu Xiangnan , feng Lizhi , Zhu JiWei 
Published: December 2019

Abstract
In order to improve forecast accuracy of bearing capacity of rock, the forecast method of bearing capacity of rock was constructed on Jeffreys prior using MCMC method of Bayesian theory. The proposed approach was used to estimate the parameters of Normal distribution. Numerical simulation study was used to produce the pseudo samples. The maximum likelihood parameter estimation method and Bayesian statistical theory were used to estimate the forecast value of the Normal distribution, which has been done by comparing with the theoretical value of the pseudo sample of Normal distribution. The result indicates that the forecast model of Normal distribution is optimal than the maximum likelihood estimation, and a significant improvement were noticed with the number increasing of pseudo sample. At last, the proposed method was applied to estimate the Normal distribution of bearing capacity of rock, which shows that the proposed method in this paper has higher precision and good applicability.
Design Strategy of Water Circulation System Above and Below Ground in Western Mining Area
Authors: Xiaodan Li , Zhiting Chen , Yakuo Li , Xiaokun Sun , Xinqi Li 
Published: December 2019

Abstract
Coal mines in ecologically fragile areas in western China are seriously deficient in water. The contradiction between coal mining and water shortage is extremely sharp. Therefore, how to effectively protect and utilize water resources has always been an important problem that plagues western mining areas. Based on the analysis of the water environment characteristics of the western mining area, a coal mine waters circulation system is designed. It consists of ground sponge facilities and groundwater reservoirs in the coal mine goafs.
Research on rapid qualitative detection of strontium in pyrotechnic powder used for fireworks and firecrackers
Authors: Jun-yi Wu 
Published: December 2019

Abstract
This study discloses a method for quickly qualitatively detecting the strontium element for fireworks and firecrackers based on energy dispersive X-ray fluorescence spectrometer (EDXRF), including the following steps: preparation of samples, establishment of detection methods, determination of the characteristic line fluorescence intensity values of Sr element in samples. The method of the study has the advantages that: (1) the method is simple to operate, and the method can be repeatedly called for testing. Only one new test method needs to be built before the sample test. After the method is established, the test can be repeated at different times without re-establishing the test method for each test. After the first establishment of the new test method, the entire test process only includes three steps: sample preparation, sample loading into the sample cup and on-board testing. (2) The detection period is extremely short. After the sample is prepared, the entire measurement process takes only about 2 minutes. (3) Labor intensity is very low and the requirements for operators are not high. (4) The method has good stability, good repeatability and high credibility.