bluuebunny/crossref_metadata_2025 huggingface dataset:
Comparative Analysis of city connection network Based on Gravity Model and Baidu Index in Wuhan urban agglomeration
Authors: Ma Weilin , Yu Yan , Meng Wenqing , Fan Jian
Published: March 2020

From the perspective of economic flow and information flow respectively, this paper applies gravity model and Baidu index method to study the city connection of Wuhan urban agglomeration and makes a comparative analysis. The result shows that the characteristics of cities in Wuhan urban agglomeration are different in economic connection network and information connection network. Based on the differences between the two types of spatial networks in Wuhan urban agglomeration, the connection ratio difference of each city in the two types of models is calculated. And the cities in the urban agglomeration are classified into economic flow dominance city, information flow dominance city or balanced flow city.
Research progress on uhv insulator functional coatings
Authors: Feng Chao , Liu Yungen , Ye Huisheng , Xie Yi , Long Yi , Hu Lian , Wang Jun
Published: March 2020

It is of great significance to develop functional coatings for uhv transmission lines which according to the working conditions and service environment to improve the safety, stability and economy of uhv transmission lines. This paper focuses on the latest research progress of uhv insulator functional coatings in recent years, including anti-fouling flashover coatings and anti-icing coatings. The preparation methods, main performance parameters, application conditions and existing problems of the two coatings were throughly discussed and the future development and research direction were also pointed out.
Research on Evaluation Index System of Urban Energy Internet Development
Authors: Zhao Zhiqiang , Li Haifeng , Wang Xiaochen , Li Zhuonan , Yu Zhiyong , Zhang Zengqiang , Song Xinfu
Published: March 2020

At present, urban energy development faces problems such as energy resources shortage, low utilization efficiency and serious environmental pollution. The urban energy Internet is considered to be an effective means to solve urban problems. In order to effectively evaluate the development of urban energy Internet, this paper has established a detailed evaluation index system from four aspects: clean and low carbon, safe and efficient, flexible and intelligent, and open sharing of urban energy development, and given some data of foreign developed countries. reference. The evaluation indicator system can be used as a pre-guided and evaluation indicator for urban energy Internet development planning.
Experimental study on seismic behavior of recycled steel tubular columns
Authors: Ye Jianfeng , Luo Caisong , Chen Huayan
Published: March 2020

In order to study the seismic performance of recycled steel tubular columns, four round steel tube recycled concrete columns were designed and fabricated, and low-cycle reciprocating tests were carried out. Considering the two parameters of regenerative coarse aggregate replacement rate and axial compression ratio, the whole process and failure mode of the specimen were observed, and the hysteresis curve, skeleton curve and stiffness degradation of the specimen were analyzed. The experimental results show that the failure process and failure modes of the recycled steel tubular columns are similar to those of ordinary circular steel tubular columns. The main performance is the drum bending of the steel pipe at the root of the test piece; the hysteresis curve of the test piece is full, and the replacement ratio of coarse aggregate is opposite. The hysteresis curve of the specimen has little effect, and the axial compression ratio has a great influence on the shape of the hysteresis curve, the skeleton curve, and the stiffness degradation. The recycled steel tubular column has good seismic performance.
The impact of carbon trading on China’s renewable energy investment: Case of CDM wind power projects
Authors: Fu Na , Mu Hailin , Li Nan
Published: March 2020

Taking the Clean Development Mechanism (CDM) wind power project as an example, this paper analyses the impact of carbon trading on China’s renewable energy investment. Based on the data of Certified Emissions Reductions (CERs) price and the registered volume of CDM wind power projects in China from 2008 to 2015, the correlation between the investment decision of CDM wind power projects and the carbon trading price is tested. This paper also establishes a profitability evaluation model for CDM wind power projects, calculates the internal rate of return (IRR) of the projects, and uses the benchmark analysis method to evaluate the economic competitiveness and investment attractiveness of the projects with or without the income of CERs. Additionally the sensitivity analysis is conducted for the main investment and income variables. It is concluded that the investment decision of China’s CDM wind power project is closely related to the current carbon trading price, and the carbon trading income is the main method to improve the profitability of renewable energy projects.
Thermo-sensitive Hydrogel Incorporating Maleic Anhydride Modified Microcrystalline Cellulose
Authors: Zhang Ting , Zheng Nan , Luo Jianfang , Cai Huiling , Li Yanghao , Zhai Jia , Peng Xinyi
Published: March 2020

The thermo-sensitive hydrogel incorporating maleic anhydride modified mcirocrystalline cellulose was prepared by two steps. At first, the mixture of maleated and fumarated celluloses were produced by a solvent-free procedure, in which the biopolymer was added to molten maleic anhydride. Secondly, the photo-polymerization of n-isopropyl acrylamide (NIPAM) with the modified biopolymer was carried out in water/NaOH/urea/thiourea solution by using 1173 as the photo-initiator. The derivatives were characterized by FTIR and SEM. It was a clear temperature dependence on the volume of the grafted hydrogel in deionized water that generated by the coil-to-globule transition of poly (NIPAM) in aqueous media from the lower critical solution temperature (LCST) of PNIPAM to the upper critical solution temperature (UCST). From the absorbance of the gel to methylene blue, it was shown that the quasi-second-order kinetics could fit the experimental data well.
Forecasting China’s per capita energy consumption using dynamic grey model based on ARIMA model
Authors: Liu Liang , Cao Jiahao , Xiang Xiwang , Zhang Peng
Published: March 2020

Energy is the cornerstone of social progress, and energy consumption is an important reference data when the government makes energy policies. Therefore, prediction of energy consumption can provide a basis for the formulation of policies. In the traditional grey system theory, the grey input is always regarded as an invariant after determined by the least square method. However, the grey input would be changed along with the change of the internal information in the grey system. As a result, the performance and accuracy of the grey model would be affected by it.Therefore, this paper proposes the ARIMA-b-GM (1,1) model, which uses the ARIMA prediction model to fit and predict the grey input and realize the dynamic change of the grey input. Then the time response sequence of the ARIMA-b-GM (1,1) model is deduced by changing the form of grey differential equation. Finally, the ARIMA-b-GM (1,1) model is applied to predict the per capita energy consumption in China. The results exhibit that ARIMA-b-GM (1,1) model has higher prediction accuracy than GM (1,1) model, NGM (1,1) model and SAIGM (1,1) model.
Analysis on the Characteristics and Driving Factors of College Students’ Green Consumption Behavior
Authors: Luo Yujie , Mao An , Yuan Yifu
Published: March 2020

Green consumption can reduce environmental pressure and promote the sustainable development of society. College students have a certain guiding role for other social groups, and have an important impact and significance on the development of green consumption. In this study, the college students in Tai’an City were taken as examples. Through a questionnaire method, their awareness and behavior of green consumption was studied and their characteristics of green consumption were analyzed. The results showed that most of the respondents had a high level of green consumption awareness, but there were some which had deficiencies in green consumption behavior. There was a certain gap between behavior and awareness. 87.88% of the respondents believed that citizens are the main body responsible for promoting green consumption. Meanwhile, government should play a leading role in promoting green consumption and strengthening the construction of relevant facilities, so as to improve the public awareness of green consumption.
Preparation of ZnO-AZO Core-Shell Nanoarrays and Its Application in Dye Sensitized Solar Cells
Authors: Wu Yi-Zhan , Fu Hai-Yan , Xiao Zong-Hu , Luo Yong-Ping , Ou Hui , Huang Ping , Liu Chen , Zhong Wei , Zhu Wen
Published: March 2020

High quality one-dimensional ZnO nanometer array (ZnO NAs) was synthesized by low-temperature hydrothermal method. The length and diameter of ZnO NAs was regulated by controlling hydrolysis time (Th) and the concentration of hydrolysate, and the surface was modified by aluminum-doped ZnO (AZO) to obtain ZnO/AZO core-shell nanometer array, which was used as the photoanode of dye-sensitized solar cells. The ZnO NAs provide a direct and stable channel for charge transfer. The electron recombination caused by reaction of the acid dye and ZnO photoanode have reduced as adding AZO shell, and increased the array surface roughness to improve the load of dye molecules. As a result, the DSSC of composite film has a hig power conversion efficiency of 1.75%.
Research on Interaction Potential Evaluation Method of User-side Resources Accessing Energy Internet
Authors: Chai Yufeng , Dai Xianzhong , Jin Xiaoling , Zhang Yan , Han Xinyang , Zhu Xu
Published: March 2020

With the deepening of the revolution in energy production and consumption, the process of large-scale development and utilization of renewable energy on the production side and the re-electrification of deep substitution of fossil energy by electric energy on the consumption side are accelerating. The increasingly important strategic position of user-side resources will play an important role in promoting re-electrification, building energy Internet, and meeting electricity demand in a clean and green way. This paper aims at the user-side resources participating in power grid interaction, analyzes the characteristics of different energy consumption demands and access to various resources of industrial, commercial, residential and public sector users, comprehensively considers the application of various resources such as distributed energy in different types of users, establishes interaction potential simulation models, quantifies the interaction potential of different resources, evaluates the utilization potential of user-side resources, and provides an effective tool for developing the utilization of user-side resources.
Effect of density on smoldering rate of cotton bale
Authors: Wang Zheng , Liu Wanfu , Ni Zhaopeng , Qi Wuqin
Published: March 2020

Cotton is an important economic crop, which plays an irreplaceable role in national production and life. With the economic development of society, the demand for cotton is also growing, which means that a lot of transportation and storage are needed. Cotton has the characteristics of smoldering, so in the process of transportation and storage, we should pay attention to the management of cotton. Open fire can cause the smoldering of cotton. In the wet environment, it is beneficial to the reproduction of microbes. If the heat can’t be released in time, it will also cause the smoldering. The density of cotton bags is different, and the porosity is different. The oxygen content in the cotton bag changes, which has an impact on the combustion state. Therefore, in this experiment, the test phenomena, quality changes and temperature changes after burning are studied for different density of cotton samples.
Experimental Study on Heat Extraction from Coal Pile by Heat Pipe
Authors: Zhang Yaping , Quan Xin , Ning Ning , Wang Jianguo
Published: March 2020

Coal spontaneous combustion is one of the major disasters in coal storage and coal transportation. Consequently, coal fire prevention and control technology is one of great significance to the safe operation of coal mines. Heat pipe is a passive heat transfer device by phase change method. Thermal energy can be transported from the underground to the surface continuously by the heat pipe effect, so that it is expected to diffuse concentrated heat and reduce the temperature of the coal pile, which is effective for preventing coal spontaneous combustion. The experiment removing thermal energy from the underground coal is carried out in order to identify the feasibility of the heat pipe heat extraction heat from the coal dump. The results out of the present experimental conditions were shown that the application of heat pipes are contributing to extinguishing coal fire as well as for energy recovery utilization purpose.
Study on Ultrasonic Extraction and Stability of Glucosinolate in Rapeseed Cake
Authors: Zhan Qiqi , Yan Jie , Bian JiaBin , Tan Chunyuan , Huang HuiMin , Lin HaiLin
Published: March 2020

This paper performs an ultrasonic-enhanced glucosinolate extraction test with the rapeseed cake as the object and ethanol as the solvent, and compares this method with the conventional one. Based on that, this paper studies the stability of glucosinolate. The result shows that under the optimal conditions (150W acoustic power, 70% ethanol, 4:1 (mL/g) liquid-to-material ratio, 60 °C, and the extraction frequency of 5 times/15 min), the glucosinolate yield can reach 62.1 mg/g. Compared with the conventional method, in order to reach the same yield, the method used in this paper can reduce the required temperature by 20 °C and shorten the extraction time by 40%. Stability test shows that the glucosinolate is sensitive to temperature and pH, more stable below 80 °C and in neutral environments; it degrades faster above 80 °C, and is easy to decompose in acidic and alkaline environments. Under the test conditions, its stability decreases with the increase of acoustical power.
Research on the application of Deep Foundation pit support technology in a residential area
Authors: Feng Zhengwei , Shen Yaohui
Published: March 2020

With the urban development, the number of private cars has been increasing and the construction scale of the basements in the residential district is becoming larger and larger. In order to meet the requirements of the structural stability of the buildings, the requirements for the technologies of the supports for slopes and deep foundation pits are getting higher and higher in engineering. In this paper, a certain residential community project is involved. The site is adjacent to the existing municipal road to the east, the north of the site is a road which has been planned, and the west of the site is the phase II project, the topographic conditions are complex. The construction scheme of the deep foundation pit works is analyzed, and the construction technologies of the soil nailing wall support, the enclosure row pile support, the large diameter long pile and pile wall works are introduced. It puts forward the corresponding quality control points, and provides reference and information for the treatment of foundation pit support under similar environmental conditions.
Study on Denitration Performance of CeO2 Modified CuO/γ-Al2O3 Catalyst Under Deferent Flue Gas Components
Authors: Zhang Qi-Long , Dong Yong , Cui Lin
Published: March 2020

The effects of different flue gas components such as n(NH3)/n(NO) ratio, SO2 and H2O on the NO removing efficiency of Cu8Ce3 catalyst were studied in a fixed bed reactor. The experimental results show that the diffusion pressure and diffusion rate of NH3 in the catalyst microporous are the main factors affecting the NO removing efficiency, when n(NH3)/n(NO) ratio<1.05. The n(NH3)/n(NO) ratio no longer plays a decisive role in the denitration efficiency, when n(NH3)/n(NO) ratio >1.05. The effect of water vapor and SO2 on the denitration efficiency is different at 350°C and 400°C. The water vapor and NH3 have a competitive adsorption relationship on the catalyst surface, which reduces the adsorption of NH3 on the catalyst surface. This is the reason why the efficiency is suppressed at 350°C; the addition of water vapor can improve the surface acidity of the catalyst at 400°C, which is why the denitration efficiency is improved at this temperature. At 400°C, the adsorption rate of SO2 on the surface of Cu8Ce3 catalyst is higher than that at 350°C. As the temperature of flue gas increases, the adsorption amount of NH3 on the catalyst surface is reduced. This is why the denitration efficiency is depressed under the SO2 intervention. The adsorption and oxidation efficiency of NH3 in the sulfided catalyst at 400°C is improved, which is the main reason for the improvement of denitration efficiency at this temperature.
Analysis the characteristics of R1234yf, R1234ze, R134a on reefer container
Authors: Ding Defeng , Zhu Zhenxiang , Chen Wu , Liu Shijie , Zheng Chaoyu
Published: March 2020

In this work, the characteristics of R1234yf, R1234ze, R134a on reefer container were studied. According to pressure enthalpy (p-h) diagram, a computer code developed by Matlab was used to calculate power consumption, coefficient of performance (COP), compression ratio, discharge temperature, etc. The result shows that, at the same degree of subcooling and superheat, the power consumption, discharge temperature and compression ratio of R1234yf is higher than that of R1234ze, R134a. The COP of R1234yf is maximum. R1234yf can be used as an environment-friendly replacement for R134a in reefer container.
Research on Variable Operating Characteristics of Condenser Considering Vacuum Tightness
Authors: Chen Youliang , Geng Haitao , Zi Pingyang , Xu Ming , Fan Rong
Published: March 2020

Considering the effect of vacuum tightness on the performance of condensers, the influence of various operating parameters on condenser pressure and terminal difference was studied by establishing a calculation model of variable operating conditions of condensers. The results show that the change of heat load has a greater impact on the vacuum, and the effect is more pronounced when the initial temperature of the cooling water is higher. Therefore, it is necessary to strictly control the internal leakage of the valve, reasonably adjust the steam parameters of the shaft seal, and minimize the additional heat load on the condenser. The cooling water flow and initial temperature directly affect the condenser vacuum and have a greater impact. The initial temperature of the cooling water is not easy to control. When the initial temperature is high, most power plants use a method of increasing the flow to increase the condenser vacuum. The cleaning coefficient and air leakage have a great impact on the quality of the vacuum. Therefore, regular operation of the rubber ball cleaning system and timely vacuum leak detection are necessary measures to ensure the vacuum of the unit, which can effectively improve the economic efficiency of the unit.
Research on the Technology of Conductor Corrosion Detection based on Eddy Current Testing
Authors: Xu Zhongkai , Zhu Yuancheng , Ma Hongfeng , Duan Youzhong , Yang Changlong , Song Deyu
Published: March 2020

The detection of conductor corrosion state provides technical guarantee for mastering the corrosion type, corrosion degree and service life of power transmission lines, realizing the timeliness and accuracy of power line replacement, and reducing the hidden danger of line safety. In this paper, a method based on eddy current testing for corrosion detection of power wire is proposed. High and low frequency eddy current testing is used to measure the residual cross-sectional area of wire, and the output database of flaw detection is established to deduce the residual tensile force of wire. Finally, by introducing the artificial single line sample and the actual running conductor for dynamic comparison, the residual tension data of the conductor can be corrected. The results show that the method adopted in this paper is feasible and accurate, which further guarantees the safe and reliable operation of overhead transmission lines.
Active Control of Vibration and Noise of Energy Equipment
Authors: Li Siting , Liu Shuyong , Yang Lihua
Published: March 2020

Vibration and noise control is an important topic in the field of energy equipment research. The traditional passive control has better control effect in dealing with high frequency vibration noise, but it is not satisfactory in low frequency noise control. The active control solves this problem better. This article gives a reference for subsequent research in this field through a review method, which has certain reference value.
Study on Mechanical Properties of Plant Fiber reinforced concrete Hollow Block
Authors: Hu Quanquan , Fang Guangxiu
Published: March 2020

In this paper, coal gangue and recycled concrete are used as some coarse aggregate instead of natural crushed stone, and plant fibers are added to improve the physical and mechanical properties of concrete. The optimum mix ratio of 28d concrete was selected from the comparative analysis of compressive strength and tensile-compression ratio. A kind of self-insulating concrete block with plant fiber was developed by designing the shape and size of the concrete block. The block has good compressive strength and low cost, can well solve environmental problems, and has good economic value and social benefits.
Research on wind-assisted solar power ship system
Authors: Zhang Haomin , Shi Decai
Published: March 2020

The wind-assisted solar power boat uses the abundant wind resources generated by the special geographical environment of the lake area as the main power, and supplements the solar power technology to power the pleasure boat, which can almost achieve zero emissions and zero pollution, effectively reducing Destruction of the ecological environment. This study further improved the efficiency of wind energy utilization by sails, and achieved automation of sail control. In addition, the combination of solar energy and wind energy will make the ship’s operating performance better and the scope of application wider. The promotion of the research results can greatly save the operating costs of cruise ships, and in the long run have greater economic and environmental benefits, which is in line with the concept of sustainable development. This research will also fill a gap in this area in China, and it is expected to do deeper research on some cutting-edge technologies.[1]
Design and Intelligent Control of Hydrogen Fuel Cell Hybrid Ship
Authors: Xu Xingang , Liu Yang
Published: March 2020

At present, with the continuous development of the world economy, people’s demand for ships is also increasing. However, most of the existing ships use the traditional diesel engine power system, which makes the petrochemical energy consumption serious. At the same time, it also brought a large amount of exhaust gas pollution, oil pollution and noise pollution. Relevant information shows that the exhaust gas emitted by ships is also one of the main sources of PM2.5 in the air, resulting in increasingly serious air pollution. According to statistics, the global shipping industry’s carbon dioxide emissions account for about 4% of global greenhouse gas emissions. The problem of ship pollution is very prominent today when it advocates cleanness and greenness, which has also attracted the continuous attention of the regulators’ policies.[1]
Study on all water foaming of rigid polyurethane foam and design of high-performance formula
Authors: Wang Zhenjun , Ma Chenyang , Zhang Chunyu , Li Xiuhao , Duan Shaolong , Chen Mengjun
Published: March 2020

The foaming properties of polyurethane rigid foam were studied by using different hydroxyl value, functionality, viscosity of polyether polyols, polyisocyanates, water, catalyst, foam stabilizer and crosslinking agent as raw materials. The microstructure and macroscopic morphology of the foams were analyzed by scanning electron microscope (SEM), which provided the basis for the selection and optimization of the composition of the raw materials for the preparation of polyurethane rigid foam. The effects of polyether polyols, catalysts, water, isocyanate index, foam stabilizer and other factors on the properties of polyurethane foam plastics were emphatically analyzed. Based on this, a high-performance all water foaming rigid polyurethane foam formula was determined.
Cooling Coral Habitats by Convection
Authors: Shen Xin
Published: March 2020

The rise of ocean temperature and the acidification of seawater caused by global warming have dealt a near catastrophic blow to corals living in shallow waters. The massive coral deaths, which have proven to be an impact of fishing, tourism and the marine ecological system, will continuously deteriorate to a stage that impairs human environment, which makes it badly-needed to reach the resolutions.

Based on previous studies on the effects of current mixing in the ocean, this project mainly utilizes convective heat transfer theories: Cooling surface water by ejecting cooling air, and circulating cooling bottom water by forced convection. It attempts to imitate and amplify natural oceanic activities to reduce the disturbance. Meanwhile, some substances are sprayed to promote the growth of phytoplankton for the acidity reduction of seawater. Additionally, setting specific constrains and preconditions according to coral habitats (continental shelf) may allow this design to be more suitable and effective.

Afterwards, the project is simulated and tested on the software Workbench Fluent. Results show that the device is capable of refrigeration, and theoretically meets the design requirement of cooling more than 2°C. The temperature field of the convective process is also clearly depicted, which indicates that the cooling mechanism of the convective circulation can be technically realized.
Effects of intercropping with Youngia erythrocarpa, Conyza canadens and Mazus japonicus on physiological and biochemical characteristics of Galinsoga parviflora under cadmium stress
Authors: Huan Yunmin , Huang Yong , Zhang Haoran , Zhou Huixuan , Jiu Zhouyang , Liao Ming’an
Published: March 2020

A pot experiment was conducted to study the effects of intercropping with Youngia erythrocarpa, Conyza canadens and Mazus japonicus on physiological and biochemical characteristics of hyperaccumulator Galinsoga parviflora under cadmium (Cd) stress. The results showed that intercropping with Y. erythrocarpa (GIY), C. canadens (GIC) and M. japonicus (GIM) all increased the superoxide dismutase (SOD), peroxidase (POD), peroxidase (CAT) activity and the soluble protein content of G. parviflora compared with monoculture (MG), the photosynthetic pigment (chlorophyll a, chlorophyll b, total chlorophyll, carotenoid) content and chlorophyll a/b of G. parviflora increased after intercropping, too. Among all treatments, GIC had the highest antioxidant enzyme activity, soluble protein content and photosynthetic pigment content. As for photosynthetic characteristics, GIC had the highest net photosynthetic rate (Pn), followed by GIY, GIM and MG. Compared with MG, the stomatal conductance (Gs) and transpiration rate (Tr) of GIC and GIM all increased significantly while that of GIC had no significant change, moreover, GIC had significantly lower CO2 concentration of intercellular (Ci) than other treatments, there was no significant difference in value of pressure deficit leaf (Vpdl) among all treatments. Therefore, under Cd stress, intercropping with C. canadens can improve the antioxidant enzyme activity and photosynthetic capacity of G. parviflora to the greatest extent, which was conducive to its remediation of Cd contaminated soil.
Effects of Chitosan on the Uptake of Total Iron, Manganese and Boron in Peach Seedlings
Authors: Yang Liu , Jiu Zhouyang , Zhou Huixuan , Zhang Haoran , Huang Yong , Liao Ming’an
Published: March 2020

As materials for the study, peach seedlings were sprayed with various concentrations (0, 1, 2, 4 and 6 g/L) of chitosan for the sake of the uptake of total iron, manganese and boron content and a more particular knowledge of the growth of the seedlings. The results in experiment showed that the total manganese content accumulated more in peach seedlings compared with other two elements. The total manganese and boron content in roots and leaves of chitosan-treated seedlings could increase in general. In the wake of the chitosan concentration increased, the total iron content in roots and leaves of seedlings gradually decreased but increased in stems. When it comes to the absorption of nutrients by peach seedlings, there were existing synergism and antagonism in this experiment among iron, manganese and boron, which were good for the growth of peach seedlings.
Effects of Chitosan on the Uptake of Total Calcium, Magnesium and Sodium in Peach Seedlings
Authors: Yang Liu , Gao Xinyu , Xiao Ling , Shu Junjiang , Li Qinyuan , Liao Ming’an
Published: March 2020

In this experiment, peach seedlings, as materials, were treated with various concentrations (0, 1, 2, 4 and 6 g/L) of chitosan. The content of total calcium, magnesium and sodium in roots, stems and leaves of peach seedlings were all measured. Overall, the chitosan treatments could increase the total calcium, magnesium and sodium content in roots and stems, especially at chitosan concentration of 2 g/L. In other words, spraying different concentrations chitosan solution could promote the accumulation of nutrient elements and the plants growth. However, the total calcium and sodium content in leaves of chitosan-treated seedlings were significantly lower than that in control seedlings. In soil, the water-soluble calcium content was higher and the water-soluble magnesium and sodium content were all the highest at 2 g/L chitosan concentration. Thus, to a certain extent, it’s good for spraying chitosan solution for the better growth and nutrient uptake of total calcium, magnesium and sodium in peach seedlings.
Effects of Biochar on Soil Water-Soluble Sodium, Calcium, Magnesium and Soil Enzyme Activity of Peach Seedlings
Authors: Wu Caifang , Hou Yuefeng , Bie Yuhui , Chen Xu , Dong Yiping , Lin Lijin
Published: March 2020

The effects of biochar (rape straw, paddy straw, wheat straw and corn straw) on soil water-soluble sodium (Na), calcium (Ca), magnesium (Mn) and soil enzyme activity of peach seedlings was studied by pot experiment. The experimental result indicated that the effect of paddy straw biochar on soil water-soluble Na content was not significant compared with control, but caused a significant increase in the content of soil water-soluble Ca and Mn. Corn straw biochar significantly increased the content of soil water-soluble Na, and the content of soil water-soluble Ca and Mg were little different from that of control. The soil water-soluble Ca content under wheat straw biochar treatments was significant lower than that of other treatments. Soil enzyme activity is a comprehensive index of soil fertility, and all the biochar treatments led to a significant increase in soil urease activity, which significantly decreased the soil invertase and acid phosphatase activities, and the soil catalase activity between biochar treatments and control had no obviously difference. In conclusion, paddy straw biochar and corn straw biochar have a better effect on soil water-soluble mineral elements such as Ca and Mg, and biochar can promote or inhibit soil enzyme activity under planting peach seedlings.
Comparison of cadmium accumulation in three Solanum species
Authors: Huang Kewen , Dong Yiping , Chen Xu , Bie Yuhui , Hou Yuefeng , Liao Ming’an
Published: March 2020

In order to study the difference of cadmium (Cd) accumulation in three species of Solanum, the Cd accumulation characteristics of Solanum nigrum L., Solanum alatum Moench and Solanum nigrum L. var. humile (Bernh.) C. Y. Wu et S. C. Huang were studied by pot experiment under the condition of Cd concentration of 10 mg/L. The results showed that the biomass of all parts of S. nigrum was significantly higher than that of other Solanum species, while the rank order of the Cd content of the Solanum species was as follows: S. nigrum var. humile > S. alatum > S. nigrum. The amount of Cd extracted by the Solanum species observed significant difference, and the amount of Cd extracted by the stems, leaves and shoots of S. alatum was significantly higher than other Solanum species, indicating that S. alatum had the best repair effect on Cd-contaminated soil.
Comparison of selenium accumulation in three Solanum species
Authors: Huang Kewen , Han Jiaxi , Huang Yingying , Jing Qianhe , Li Aihui , Liao Ming’an
Published: March 2020

In order to compare the difference of selenium (Se) accumulation in three Solanum species, the Se accumulation characteristics of Solanum nigrum L., Solanum alatum Moench and Solanum nigrum L. var. humile (Bernh.) C. Y. Wu et S. C. Huang were studied by pot experiment at a Se concentration of 10 mg/kg. The results showed that the biomass of all parts of Solanum species was as follows: S. nigrum > S. alatum > S. nigrum var. humile. Interestingly, contrary to the order of Solanum species biomass, the Se content of all parts of Solanum species was as follows: S. nigrum var. humile > S. alatum > S. nigrum. Furthermore, the amount of Se extracted by leaves and shoots was significantly higher than that of other Solanum species, and reached 38.73 and 51.40 μg/plant, respectively. Among the three Solanum species, S. nigrum var. humile has the strongest enrichment ability for soil Se and is an ideal Se-enriched vegetable.
Effect of mutual grafting on the growth and moisture content in post-grafting of two varieties cherry tomato seedlings
Authors: Liang Le , Li Aihui , Jing Qianhe , Huang Yingying , Han Jiaxi , Tang Yi
Published: March 2020

The effects of mutual grafting on growth and moisture content in post-grafting generations of two varieties cherry tomato seedlings (yellow cherry tomato and red cherry tomato) under stress of Cd were studied in a pot experiment involving the following: un-grafted yellow cherry tomato and red cherry tomato (Yellow CK and Red CK), yellow cherry tomato as rootstock and red cherry tomato as scion (Yellow Rootstock, Red Scion), yellow cherry tomato as scion and red cherry tomato as rootstock (Yellow Scion, Red Rootstock). Mutual grafting increased plant height, stem weight of post-grafting of yellow cherry tomato; however, stem diameter, root and leaf weight and moisture content were no significantly effects compared with Yellow CK. As for red cherry tomato seedlings, mutual grafting increased root length of post-grafting; plant height and moisture content of post-grafting of Red Rootstock were increased, while in Red Scion, the these parameters decreased or showed no significant effects. These results imply that mutual grafting may improve or no effect in growth and moisture content of post-grafting generations.
Study on Rural Environment Construction Based on the Development of Traditional Industry——Taking Jiuxian Village of Zhanjiang as an Example
Authors: Deng Wan , Zhang Qian , Zhang Zhijing , Li Yongyi , He Shuting , Jiang Yanji
Published: March 2020

Under the background of the rural revitalization, it is necessary to think about how contemporary China’s villages develop new characteristics according to their traditional industry, reform and innovation to help drive the villages’ environmental construction and cultural protection. The article studies how contemporary villages implement social protection, upgrade traditional industries, display characteristics, and innovative ideas. In this article, the planning of Jiuxian Village in Zhanjiang is taken as an example, and the construction plan of rural revitalization is proposed from the perspective of sugar industry development. The rural environment construction strategies under the industrial orientation are proposed through cultural protection, element extraction, technical analysis and structural optimization of the site environment, which aims to provide useful guidance for the construction of traditional village culture and environment. This program has won the Residential Area Planning Excellence Award in the 8th IDEA-KING Student Group.
Analysis of volatile compounds in Annona squamosa L. fruit under cold storage based on HS-GC-IMS
Authors: Gong Xiao , Tan Ge , Hu Xiaojun , Li Jihua
Published: March 2020

Annona squamosa L., also known as sugar apple, sweetsop, is listed as one of the world’s five largest tropical fruits and is commercially cultivated in tropical and subtropical regions of China. To analyze the effect of different preservatives on the volatile aroma components of sugar beets during cold storage, the samples were stored at 4 °C and sampled every two days. The change in volatile aroma components was studied by changing the composition of the preservative. The volatile aroma components in the storage of sweetsop were analyzed by GC-IMS. The results indicated that the preservation of the sweetsop by 1-MCP made the volatile aroma as much as possible with the fresh components under the condition of cold storage. The findings of this study are of great significance for the research and development of the future preservation method of Annona squamosa L. fruit and will provide theoretical support for the preservation technology of tropical fruits.
Multi-scenario Analysis of Thermal Power Units Emission Reduction Considering Optimal Cost-effectiveness
Authors: Zheng Kuan , Zhao Qiuli , Shen Shumei , Zhang Fuqiang , Zhou Mi
Published: March 2020

This article is guided by the most cost-effective emission reduction program, according to the statistics of different unit types installed in 2015, including the operation of each unit, the decommissioning period and the relevant policies and regulations that the country has now clearly defined. This article analyzes the coal-fired emission reduction scenarios and forecast the thermal power generation reductions in 2020 and 2030. It verifies the superiority of the emission reduction scheme and provides a reference for the next step of technology and equipment development.
Flotation Separation of Zn2+, Mg2+, Fe2+, Ni2+ and Hg2+ using KNO3-PAN-Ethanol System
Authors: Wen Xinrong , Tu Changqing
Published: March 2020

The flotation separations of Zn2+-Mn2+, Zn2+-Fe2+, Zn2+-Ni2+ and Zn2+-Hg2+ have been studied. The separation conditions of Zn2+ with Mg2+, Fe2+, Ni2+ and Hg2+ using KNO3-PAN-ethanol system are discussed. The results show that in the presence of 1.0 g KNO3, when the dosage of PAN ethanol solution and pH 8.5 NH3-NH4Cl buffer solution both are 2.00 mL, the chelate settlement of Zn-PAN which form from the system is flotated to the ethanol-phase. Zn2+ is flotated quantitatively. While Mg2+, Fe2+, Ni2+ and Hg2+ can not be flotated. The quantitative separations of Zn2+-Mn2+, Zn2+-Fe2+, Zn2+-Ni2+ and Zn2+-Hg2+ are achieved, and the results are satisfactory.
Kinetic and thermodynamic analysis of adsorption of naproxen by activated sludge
Authors: Tang Ying , Hong Chengyang , He Xiuling , Ren Ke
Published: March 2020

Naproxen, a new environmental drug pollutant, shows “false persistence” in the environment and causes certain risks to human health and ecological environment, which has attracted extensive attention. The activated sludge in the sewage treatment technology plays a significant role in the control of the naproxen content. This paper carried out the kinetics and thermodynamic analysis of the adsorption process of naproxen by activated sludge. The experimental results show that the adsorption process of naproxen by activated sludge conforms to the pseudo-second-order kinetic equation and the linear fitting R2value is more than 0.99 at different initial concentrations. The Freundlich equation and Langmuir equation were adopted to carry out the adsorption models fitting. The Freundlich equation could represent the adsorption results satisfyingly. There is a negative correlation between the initial concentration of naproxen and the adsorption rate. The adsorption effect is determined by the hydrophobicity of naproxen and the electrostatic reaction between naproxen and activated sludge. After adsorption, there is no obvious naproxen desorption in activated sludge.
Distribution of chlorophyll and phytoplankton in Xiapu, Fujian
Authors: Hao Zhe , Feng Ziyue , Zou Xinqing , Feng Weihua , Xu Hengtao
Published: March 2020

Phytoplankton is the primary productivity of the ocean, increasing their biomass through accumulating organic matter synthesized by photosynthesis. Chlorophyll a and pheophytin will all bring important influence on the recognition of biological optical information for phytoplankton. So it’s necessary to analyse distribution of chlorophyll and phytoplankton. In this study, the concentration distributions of chlorophyll a and pheophytin in Xiapu were obtained. As a result, the overall trend of concentrations showed summer > spring> autumn > winter . This was mainly because of the difference of seawater temperature. The distribution of chlorophyll and phytoplankton varied with time. And they share a similar trend, indicating that chlorophyll content directly affects phytoplankton content.
Application Research on Deodorization Effect of Domestic Waste by One Microbial Deodorizer
Authors: Chengyang Hong , Ying Tang , He Xiuling
Published: March 2020

In order to assess the deodorization effect of the selected microbial deodorizer, one garbage truck and three refuse transfer stations were used for our investigation. The removal efficiency of NH3, H2S and odor concentration from domestic wastes was studied. The results showed that the concentration of NH3 was decreased by 90.9% and the concentration of odor was decreased by 92.8% when spraying deodorant in the garbage truck. In the three refuse transfer stations, the average removal rates of NH3 and the odor concentration were 66.7% and 34.7%, respectively. Good deodorizing effects of the selected microbial deodorizer were obtained in this research.
A new concept of river and lake regulation: “Bi Dao”
Authors: Ning Yun-Fang , Zhang Jian-Tong , Huang Jian-Hong , Long Heng-Feng , Huang Qiu-Shui
Published: March 2020

The aquatic environmental regulations at home and abroad is rarely considered from the perspective of water body and water bank treatments together and coordinated economic and cultural development. To improve the environmental quality of waterfront cities and activate and revitalize their vitality in waterfront areas, it is necessary to make full use of the water system and its surrounding green space, to get through the waterfront slow-moving system, and connect various natural and human elements along the waterline. Li Xi, the Secretary of Guangdong Province, China, proposed the concept of “Bi Dao”. “Bi Dao” is a comprehensive regulation concept that integrates natural elements and economic and social attributes with water as the main focus. “Bi Dao” is constantly evolving, innovating and enriching in practice and provides a useful tool for exploration and practice in China’s environmental regulation efforts. “Bi Dao” will improve the quality of cities on both sides of the river or lake and lead to industry transformations and upgrades, which will promote economic and social development and improve the level of ecological civilization.
Systematic treatment of urban river pollution
Authors: Ning Yun-Fang , Zhang Jian-Tong , Huang Jian-Hong , Long Heng-Feng , Huang Qiu-Shui
Published: March 2020

Urban river pollution is one of the most prominent environmental problems in Chinese cities that have been trying to prevent and control. The aim of this paper is to propose an urban river governance framework from the perspective of systematic governance. The point source pollution control is the premise of river regulation. Increased impervious surface in urban areas due to urbanization continuously increases the concentration of stormwater runoff pollutants. Many low-impact development facilities such as sunken lawn and rain gardens can also effectively reduce with non-point source pollution. Controlling the pollution source eliminates some pollutants in the river though it does not improve its own ecosystem. Since the self-purification ability of an unstable ecosystem is weak, the restoration of ecosystems is critical component of the water environment management. Urban river regulation should focus on sustainable management of river sources to meet the human needs, while ensuring the health and continuous development of river ecosystems, water ecology, water landscape and water culture.
Study on the Absorption of Nitrous Tetroxide Waste Gas by Foaming Agent
Authors: Tong Wei , Zhao Bing , Wang Ying , Wang Weiqing , Cong Rimei , Wu Yi , Huang Xiyun , Huang Dan , Hao Yizheng
Published: March 2020

The problem of waste gas treatment of nitrogen tetroxide(N2O4) has long been a difficult problem for researchers. This paper determines the combination liquid formula of N2O4 waste absorption system by screening absorbent, foaming agent and foaming method, and finds a new method to deal with N2O4 waste gas. In addition, the paper measures nitrate and nitrite content respectively by UV-visible spectrophotometry, and obtains the absorption rate and the nitrite emission of absorption system in order to judge the overall absorption effect. The research results show that using the new method in the actual waste gas absorption, absorption rate can reach more than 93% under the simple exposure device, while nitrite content is lower than the national surface water discharge standard, which can solve the problem of waste gas harm.
Study on the influence of Village form of famous Tourism Village on the layout of garbage Collection points-A case study of famous Tourism Village in Guilin City
Authors: Feng Bing , Liu Yalong , Liu Xiaoyu , Xie Ran , Xiang Yi
Published: March 2020

Based on the contradiction between the rapid development of tourism, especially rural tourism and the increasing complexity of domestic garbage in recent years, a representative tourism village in Guilin City, Guangxi Zhuang Autonomous Region, was selected to study the layout of garbage collection points. Firstly, the characteristics of domestic garbage are analysed, that is randomness, timeliness of transporting, diversity and minimization of ending. Secondly, the villages are investigated to determine the status quo of village form and garbage bin layout. Finally, the number and size of collection points are affected by the points of village form, and the line of village form influences collection points. The layout direction, the main structure of the formation of the plane graphics determines the layout of important garbage collection points into a line formed by the graphics.