bluuebunny/crossref_metadata_2025_split huggingface dataset:
Activated carbon preparation from bagasse and banana stem at various impregnation ratio
Authors: Misran E , Sarah M , Irvan  , Dina S F , Harahap S A A , Nazar A 
Published: June 2020

Abstract
The effects of impregnation ratio on characteristics of activated carbon from bagasse and banana stem were analyzed. The precursors were impregnated using phosphoric acid (H3PO4) solution as the activator at a ratio of the activator to the precursor (w/w) of 1:1, 2:1 and 3:1. Pyrolisis was conducted at 400 °C for 15 minutes. The results showed that activated carbon from bagasse has better yield, surface area and total pore volume compared to activated carbon from banana stem. The increased of impregnation ratio decreased the yield and surface area, but increased the total pore volume and pore radius. The highest yield of activated carbon from bagasse and banana stem were 61.87% and 45.53%, respectively. Whereas the highest surface area of activated carbon from bagasse and banana stem were 1,070 m2/g and 915 m2/g, respectively. The activated carbon produced from both precursors contained both micropores and mesopores structures.
Comparison of 2 angle collectors with variations 0°, 20°, 30° and trapezoidal groove plate
Authors: Sirait A R H , Hutapea G P , Ambarita H 
Published: June 2020

Abstract
Numerical study of three types of collectors. There is 0°, 20°, 30° of angled two collectors. This simulation finds out which collector will be the most optimum tilt angled solar collector while every collector got same sun’s radiation. The boundary condition is The simulation will be at 3.33° North and 98.39° East (Mechanical Engineering Magister Program, University of North Sumatra, Medan) and The simulation will be on 23 April at 12.30 Measurement point in this simulation are the inlet temperature, the outlet temperature, absorber plate. The most efficient collector is 30°
Study on HPLC Fingerprint of Alpinia katsumadai Hayata
Authors: Wu Hongmei , Kong Juan , Yang Xiaosong , Zhang Lingling , Huang Xulong , Wang Xiangpei 
Published: June 2020

Abstract
Objective: to establish HPLC fingerprint of Alpinia katsumadai Hayata. Method: 10 batches of Alpinia katsumadai Hayata was analyzed by HPLC that the methods were used Diasonsil C18 chromatographic column, with the mobile phase of acetonitrile-0.1% phosphoric acid solution, the flow rate was 1mL/min, the wavelength was 220nm, and column temperature was 30°C. Similarity of 10 batches of Alpinia katsumadai Hayata was evaluated by similarity evaluation software. Result: The HPLC fingerprint of Alpinia katsumadai Hayata was established, and 19 common peaks were determined, the similarity was between 0.995-0.822. It shows that the difference between the 10 batches of Alpinia Katsumadai Hayata was not significant. Conclusion: The analysis method is fast in operation, good in separation, strong in stability and good in repeatability, which can provide reliable basis for quality control of Alpinia katsumadai Hayata.
Analysis of the Causes of Environmental Barriers along the Belt and Road Countries
Authors: Fa Lina 
Published: June 2020

Abstract
The Belt and Road Initiative provides a new path for Chinese companies to go global, but with the increase of host countries’ environmental awareness and the urgency of protecting their own resources, Chinese companies will inevitably encounter national ecological environment risks along the route. At the same time, because Chinese companies ignore environmental protection in the investment process, causing environmental pollution in the countries along the route, people in some countries have questioned Chinese investment. They restricts Chinese enterprise investment and product exports by setting environmental barriers. Some developed countries along the Belt and Road also use environmental barriers as a means of trade protection to protect their own markets and restrict exports from other countries.
Study on the Current Situation and Countermeasures of General Industrial Solid Waste Management in Beijing
Authors: Chen Jiali 
Published: June 2020

Abstract
Based on the present situation of general industrial waste management in Beijing as the research object, analyzed the 2008-2017, the trend of general industrial waste emissions in Beijing, several main waste disposal, the change of the quantity and the comprehensive utilization of the status quo, analysis of a series of problems, put forward three countermeasures of general industrial solid waste management.
Analysis of the Change Characteristics of PM2.5 and PM10 Concentrations in Tianjin
Authors: Yang Yi 
Published: June 2020

Abstract
This paper studied the time series of daily average concentration of PM2.5 and PM10 in Tianjin The time series of daily average concentration were studied to analyze their annual change rules and mutation characteristics, and the annual change rules of PM2.5 concentration and PM10 concentration time series were compared. It is concluded that PM2.5 and PM10 have similar change rules, corresponding policies should be formulated to reduce pollution emission, reduce the pollution emission of heavy industry in winter.
Multi-classification application of Chinese news text based on deep learning
Authors: Xin Siyu 
Published: June 2020

Abstract
As the core of Internet text processing and text mining, text categorization has become a key research issue in the field of natural language processing. The traditional methods mainly focus on shallow machine learning. With the rapid development of deep learning technology, its image recognition and speech A huge research breakthrough in the field of identification, the feature learning ability of the depth model is further proved. This paper is based on the THUCNews data set, combined with word embedding technology, using TextCNN and RNN to achieve multi-classification of text. The experimental results show that the accuracy of TextCNN on the test set reaches 96.04%, and the precision, recall and f1-score of all types exceed 0.9, and the accuracy of RNN on the test set reaches 94.22%, and various types of Precision, recall and f1-score, in addition to the home category, are over 0.9. Comparing the two models, it can be seen that RNN is not very satisfactory except for the classification in the home. Other categories are not much different from CNN, and further adjustment parameters can be used to achieve better results.
Numerical Simulation Study on Temperature Field of Dry Hot Rock Gas Drilling Wellbore
Authors: Yang Sen , Zhang Jie 
Published: June 2020

Abstract
In this paper, gas drilling is used for dry hot rock drilling. According to the first law of thermodynamics and the basic principles of heat transfer, a mathematical model for the temperature field of dry hot rock gas drilling wellbore is established. The model is solved by the full implicit finite difference method. Then, relevant sensitivity analysis was carried out. The model can be used for the temperature distribution of drill string, annulus and formation under actual dry hot rock well circulation conditions.
Parametric Analysis of the In-bed gas flowing calorimetry of metal hydride bed employed in CFETR SDS
Authors: Fan Peng , Fu Wanfa , Wen Ming , Zhang Zhi , Tang Tao , Tang Quan 
Published: June 2020

Abstract
Gas flowing calorimetry is considered to be one of the most promising tritium measurements method in fusion fuel cycles, yet the parametric study of the structure design is still insufficient. In this study, three-dimensional models, combining with commercial computational fluid software, has been used to evaluate the calorimetric performance of tritium storage beds. The effects of structural geometry and cooling method on the heat transfer behavior have been systematically studied. The results show that the proposed model can effectively characterizes the evolution of the temperature difference of the cooling gas with time during the calorimetric process. Typically, increasing number of the U-shaped cooling tubes, thickness of the metal hydride layer and flow rate of the cooling liquid are beneficial for reducing the thermal equilibrium time. When the number of calorimeter bed cooling tubes is 12, the thickness of the metal hydride layer is 23, and the cooling gas is 20 SLMP of CO2, the thermal equilibrium time is only 4.5h. Furthermore, through optimizing the structural parameters, which can have an important influence on calorimetric performance, highly efficient and accurate gas flow calorimeter can be developed in the future.
Evaluation of City Ecological Vulnerability in Shanxi Province
Authors: Ye Qing , Yu Hua , Jin Shaofei 
Published: June 2020

Abstract
Ecological vulnerability assessment is an important basis for comprehensive regional ecological sustainable assessment. Evaluating ecological vulnerability of Shanxi Province, a large coal mine province in China, is helpful for the restoration and construction of the ecological environment and sustainable cities. This paper establishes an ecological vulnerability evaluation index system based on ecological vulnerability research methods, calculates the weight of each indicator through the entropy weight method using the quantitative analysis to obtain the ecological vulnerability of each prefecture-level city, and evaluates the ecological vulnerability of Shanxi Province. The results show that Shanxi Province has a moderately fragile, fragile and extremely fragile land area of 77.39% of the total areas. Cities of Yangquan, Jincheng, and Luliang are in a mildly vulnerable grade. Cities of Taiyuan, Changzhi, Shuozhou and Linfen are at a moderate fragile level. Cities of Datong, Jinzhong, and Yuncheng are at a fragile level of strength. Xinzhou is at a very high level of fragility. Our results imply the status quo of the ecological environment in Shanxi Province is not optimistic.
Policies and Enlightenment of Safe Reuse of Contaminated Sites after Remediation in the United States and China
Authors: Li Xu , Nie Xiaoqin , Shu Tianchu 
Published: June 2020

Abstract
Aiming at a series of problems in the reuse of contaminated sites in China, this paper summarizes the relevant policies for the reuse of contaminated sites in the United States, including contaminated site reuse model, reuse assessment, reuse categories, and reuse innovation projects. It also sorted out the local standards or technical guidelines initially formulated in Beijing, Guangdong. By summing up experience and comparison, it puts forward some enlightenments and suggestions in the safe use of contaminated sites after remediation in China.
Research on the Development of Beijing Suburban Public Transportation Based on SEM
Authors: Jin Tiantian , Zhou Yaodong 
Published: June 2020

Abstract
With the development of urbanization and the general of separation between working site and residence, suburb commuting has become an inevitable demand for the development of the metropolitan area. Existing literature has studied public transport transfer from the aspects of efficiency, accessibility, and satisfaction. This paper attempts to study passenger convenience during the transfer process from a more micro perspective. Based on a sample of 383 valid questionnaires for passengers in the suburbs of Beijing, a structural equation model was constructed to study the influencing factors of transfer convenience on travel choices. The empirical results show that passengers’ perception of the convenience of transfer in the suburban commute is characterized by comfort, safety and quickness, with comfort coming first, then safety, and quickness the last.
Study on the Application of Rainwater Management Technology in the Space of Suzhou
Authors: Ma Jianwu , Yang Yan , Li Shuangqi 
Published: June 2020

Abstract
Chinese sponge city construction is in full swing. The research of regional sponge city technology is not only important but also urgent. This paper takes Suzhou as The main research object. And through the analysis of the specific natural environment and water quality characteristics of runoff in Suzhou, Proposes that “interception” and “purification” should be the primary goals of rainwater management in Suzhou. On this basis, it puts forward that “water quality management is the main and water quantity management is the auxiliary. The management strategy of displaying the characteristics of the city and the landscape of technical facilities. “According to The comprehensive comparative analysis of objective, the conditions, pa., Artistry and ecology of the application of general technology in the United States and China, each technology is classified into three types: It use, Optional use and not it use. It is hoped to solve the confusion of the applicability of sponge technology and the harmony between engineering technology and urban art temperament in a Natural, ecological and landscape aesthetic way.
Research on Industrial Structure Transformation of Hefei City under Low Carbon Background
Authors: Deng Zhijia , Zhou Yaodong 
Published: June 2020

Abstract
Under the background that global warming poses a serious threat to human normal production and life, the development model of low carbon economy is undoubtedly an effective measure to give consideration to ecological protection and economic growth. This paper takes this as the background, through the research on the industrial structure of Hefei, finds out the problems of the low carbon economic structure in Hefei, and puts forward the countermeasures and measures for the transformation of industrial structure with these problems.
Variation Characteristics of PM10 and Its Interaction with Meteorological Effects during 2014-2016, Fuzhou, China
Authors: Li Junyi , Sun Danmei , Huang Yulin , Chen Ye , Lan Yuxiang , Dong Jianwen 
Published: June 2020

Abstract
Air pollution has become worldwide environmental issue in present day. In this study, the concentrations of PM10 was analyzed with hourly datasets, and the data of meteorological conditions were measured per 3 hours from 1st Sep 2014 to 30th Sep 2016 at Fuzhou city in the southeastern China. The mean value of mass concentration of PM10 is 54.65±24.07μg m−3 in the study period. The correlation coefficient between mass concentrations of PM10 and meteorological factors were analyzed, it shows that there existed a negative correlation between PM10 and T (−0.03), RU (-0.27), WS (−0.10), HCC (−0.04), VIS (−0.31), DPT (-0.15) and RF (-0.14). Subsequently, the impacts of typhoons on the mass concentrations of PM10 during September 10th 2016 to September 16th 2016 were analyzed during which the mass concentration of PM10 decreased at a large extent and the particulates have more prominent changes during the typhoon period compared with coarse particulates.
Research on Application of Environmental Design Concept in Industrial Building Design
Authors: Lu Zhengyan 
Published: June 2020

Abstract
With the development of the times and the demands of the broad masses, architectural designers pay more and more attention to the design of small cities. Combined with project design examples, focusing on the theme of green and energy saving in small urban residences, through design concepts, general floor layout, environmental landscape design, new building technology design, sanitary and environmental protection design, and some detailed design, in order to achieve green, healthy, energy-saving, Ecological high-quality living environment.
Analysis of Urban Green Space Landscape Pattern in Suzhou
Authors: Jie Shi , Ma Jianwu 
Published: June 2020

Abstract
Based on the landscape ecological methods, GIS software and aerial images of 2018a, this paper studies the spatial pattern of urban green landscape of Suzhou via landscape ecological theory. The green landscape was consists of several kinds of patches according to the size. Landscape ecological indexes such as the number of patches, landscape fragmentation, and landscape separation were selected to study the landscape pattern of green space in the main urban area of Suzhou. The results show that the biggest green area is in Wuzhong District, the minimum is Gusu District; the green landscape fragmentation of Gusu Districtis is the highest, but the lowest is in Wuzhong District; the landscape separation degree is the largest in Wuzhong District, and the industrial park is the smallest. Comprehensive analysis shows that the landscape pattern of green space in Wuzhong District is more desirable. Finally, some suggestions are given on how to optimize the green space construction in Suzhou.
Discussion on the Conversion Method of Soil Enzyme Stoichiometry from Different Vegetation Types in Guizhou Grassland, Southwest China
Authors: Yang Fuli , Ding Leilei , Zhang Yujun , Wang Puchang , Liu Jiajia , Zou Chao , Chen Chao 
Published: June 2020

Abstract
Soil extracellular enzymes play an important role in regulating the circulation and fixation of soil nutrients, and their stoichiometric ratio reflects the demand of microorganisms for nutrients and the supply of nutrients in the environment, so it has been widely concerned. In this study, the soil C-, N- and P-acquiring enzyme activities (β-1, 4-glucosidase, BG; β-1, 4-N-acetylglucosaminidase, NAG; leucine aminopeptidase, LAP; acid phosphatase, AP) in the upper 30 cm of soils were investigated under three vegetation types (white clover grassland, fescue grassland and natural grassland) to explore the optimal enzyme stoichiometric conversion method. The results showed that the data converted from [asin (βG/[βG + AP])] or [asin (βG/[NAG + LAP])] were more suitable to the normal distribution in general. The response of different soil enzyme conversion methods to soil depth was different. The conversion from [asin (βG/[βG + AP])] or [asin(βG/[NAG + LAP])] in 0-20 cm was more suitable to normal distribution, and the transformation of [ln (P/[1 - P])] was more suitable to normal distribution at 20-30cm. The response of different soil enzyme conversion methods to vegetation type was also different. The conversion from [asin (sqrt [βG/(βG + AP)])] or [asin (sqrt [βG/(NAG + LAP)])] was more suitable in fescue grassland, that of [ln (P/[1 - P])] was more suitable in white clover grassland, and that of [βG/AP]) or [βG/(NAG + LAP)] was more suitable in natural grassland.
Soil Image Segmentation Algorithm under Complex Background
Authors: Ma Yan , Zhang Yongru , Yang Shengming 
Published: June 2020

Abstract
In order to solve the problem of foreground and background segmentation of soil images under complex backgrounds, this paper proposes an image segmentation algorithm that combines colour features and local blur characteristics. First, the collected field soil images are converted from the RED colour space to the HSL colour space and the H component features are extracted. The H component is then converted to the CIELAB colour space. The b* component image is selected as a binary value based on the soil colour characteristics Pre-processing of H component. Then, the image fusion is performed according to the H component features, the b* binarization result, and the H-component local fuzzy variance pre-processing result to obtain a fusion result. Finally, in order to solve the hole problem in the segmentation result, the fusion result is subjected to boundary recognition and maximum boundary extraction, and the obtained maximum boundary region is filled to obtain the final image segmentation result. In order to test the segmentation effect of the proposed algorithm, Otsu is used to perform threshold segmentation on the soil image. The average time consumption of the two algorithms is 2.360 and 4.48. Comparing the time consumption of the two segmentation algorithms and the segmentation effect of the soil image, the experimental results of the proposed algorithm are significantly better than the Otsu segmentation algorithm.
Method Statement for Reconstruction / Strengthening of Existing Nullah Structures for Tsui Ping River
Authors: Cai Lixu 
Published: June 2020

Abstract
Revitalization of Tsui Ping River project needs demolition part of nullah structures and reconstruction of it. According to the particular specification and Drainage Service Department requirement, fully closure of Tsui Ping River are not allowed. Any construction work for the river bed in the wet season need to get approval. This article shows the method statement for reconstruction/strengthening of existing nullah structures for Tsui Ping River.
Research on the Construction of Collaborative Innovation Ecosystem in Hefei’s “Innovation Capital”
Authors: Wang Zhe 
Published: June 2020

Abstract
The collaborative innovation ecosystem belongs to a new innovation management mode, and building a dynamic collaborative innovation ecosystem is an important prerequisite and guarantee of urban collaborative innovation. Based on the theoretical research of collaborative innovation ecosystem and the analysis of its basic characteristics and operating mechanism, the paper constructs the innovation ecosystem model of Hefei National Science Center based on the theory of symbiosis, and makes a concrete analysis of the operation mechanism. Finally, the specific safeguard measures of constructing a collaborative innovation ecosystem are discussed in connection with Hefei.
Wet Oxidation Technology Based on Organic Wastewater Treatment
Authors: Zhang Yongxun 
Published: June 2020

Abstract
Wet oxidation technology is a kind of advanced oxidation technology, which is suitable for the treatment of high concentration, toxic, harmful and biodegradable organic wastewater. WAO technology has been effectively applied in the following wastewater treatment: cyanide wastewater, sulfur wastewater, paper black liquor, municipal sludge, pesticide wastewater, coal gasification wastewater and activated carbon regeneration. (2) chemical reaction between dissolved oxygen and matrix. The front part of WAO reaction is controlled by oxygen mass transfer and the back part is controlled by reaction kinetics. It is generally believed that the WAO reaction mainly belongs to the free radical reaction, which goes through four stages of induction, proliferation, degradation and termination. The reaction temperature is the main factor affecting the wet oxidation reaction.
Exploration and Conception of Legal Guarantee of Carbon Emission Trading
Authors: Yao Jiejing , Peng Hui 
Published: June 2020

Abstract
In accordance with the direction and requirements of market-oriented, rule of law and internationalization, and in combination with the development practice of China’s carbon market, we will further improve the existing carbon trading system, and study and expand the scope of control and increase the intensity of control. Enhance the policy and regulation of the targeted, operational, promote enterprises, organizations and the public to better fulfill the carbon emission reduction responsibilities, and then form a shared good ecological environment of the social atmosphere. We actively respond to climate change to make greater contributions, to further promote the development of green & low-carbon and beautiful environment, for the construction of carbon market at home and abroad.