bluuebunny/crossref_metadata_2025 huggingface dataset:
Life Cycle Assessment of Straw Solid Particle Molding Fuel Manufacturing Process
Authors: Zhao Fei , Liu Guodeng , Sun Pengcheng , Bi Wenxin , Gong Xian
Published: September 2019

Taking a 500,000 t/a straw briquette fuel plant in Baoding area of Hebei Province as an example, this paper establishes a life cycle energy consumption and environmental emission analysis model of straw solid fuel. Based on this model, the energy saving and greenhouse gas emission reduction potential of straw solid particles as typical briquette fuels are quantitatively analyzed. Secondly, the life cycle energy consumption and environmental emissions are analyzed. Finally, from the point of view of energy consumption and environmental emissions, the potential value of environmental impact is calculated by standardization and sensitivity analysis is carried out. The results show that the energy consumption of straw granulation stage (compression molding stage) accounts for the largest proportion in the solid particle manufacturing life cycle, reaching 32.30%. Compared with fossil fuels, solid particles have a large emission reduction advantage, which provides basic data for the utilization of straw solid granular forming fuel.
Research on the Method of Evaluating Psychological Stress by EEG
Authors: Zhang Shuo , Li Binlin , Chen Xuanru , Lu Tong , Zhao Chunhua , Ren Jie , Ji Xiaoqiang
Published: September 2019

Stress is the source of all diseases, and the detection and management of psychological stress are very essential to everyone. In this paper, a stress evaluating system based on the EEG is designed for evaluating the state of psychological stress objectively. Firstly, the changes of EEG signals are obtained in real-time by using TGAM modules. Then the signal processing and wireless transmission are carried out by using Bluetooth technology to the computer. The pressure eigenvalues of EEG, which includes focal point, the edge spectrum, EEG pressure index and so on, are extracted. Finally, the results of the EEG analysis are to realize the automatic evaluation of stress state. At the same time, the experiment of pressure induction and evaluation is designed for verifying specific groups and combined with the VAS test. The results show that the EEG analysis can detect psychological stress more objectively, comprehensively and accurately.
Influence of Vertical Hole Defects on Ultrasonic Test
Authors: Yannan Du , Xuchen Zhu , Weiping Ouyang , Xiaoying Tang , Xiaolong Xue , Ju Ding
Published: September 2019

9Ni steel has good toughness and high strength. This paper focuses on the influence of vertical hole defects on the ultrasonic propagation characteristics, which are studied from two aspects of the propagation characteristics of the base metal and the ultrasonic waves of the weld, respectively. The acoustic reflection characteristics of the reflector are compared with the acoustic reflection characteristics of the two different welding processes, (manual welding and automatic welding). It is shown that the gain compensation of the weld is larger than the gain of the same diameter and the same position of the vertical hole in the base metal. The gain compensation of the automatic welding is larger than that of the manual welding. The ultrasonic attenuation in the automatic welding is larger than that of the manual welding. The results of the study contribute to improving the application of ultrasonic testing in 9Ni weld joints.
Effect of Cross-slot Defect in welded joint on Ultrasonic Test
Authors: Yannan Du , Xuchen Zhu , Weiping Ouyang , Xiaoying Tang , Xiaolong Xue , Ji’ai Xue
Published: September 2019

This paper focuses on the influence of vertical hole defects on the ultrasonic propagation characteristics, which are studied from two aspects of the propagation characteristics of the base metal and the ultrasonic waves of the weld, respectively. The acoustic reflection characteristics of the reflector are compared with the acoustic reflection characteristics of the two different welding processes, manual welding and automatic welding, and the properties of the base material. It is shown that the cross-slot of the weld is different from the cross-slot in the base metal, and the attenuation of the ultrasonic wave in the base metal and the weld is different. The gain compensation is too large, and the automatic welding gain compensation ratio of the upper groove of the weld is lower. The automatic welding gain compensation of the cross-slot is large, and the manual welding gain compensation of the lower cross-slot is higher than that of the automatic welding, and the cross-slot gain compensation of the automatic welding upper surface weld is higher than that of the manual welding.
Preparation and Characterization of Water-soluble ZnSe: Fe/ZnSe Quantum Dots
Authors: Huang Meijing , Qiu Chunhong , Huang Fenghua
Published: September 2019

Water-soluble Fe-doped ZnSe/ZnSe quantum dots (ZnSe: Fe/ZnSe QDs) were prepared through a facile, low-cost and effective strategy in aqueous solution using L-cysteine ( L-cys) as modifier. X-ray diffraction (XRD) studies showed that the prepared ZnSe: Fe/ZnSe QDs belonged to zinc blende crystal structures. Transmission electron microscopy (TEM) exhibited that the average diameter of ZnSe: Fe/ZnSe QDs was about 2.9 nm. Infrared spectrum (IR) exhibited that the L-cys has been successfully modified to QDs. The tests of Ultraviolet-visible (UV-vis) spectrum exhibited that the absorption edge position of ZnSe: Fe/ZnSe QDs had a sight red shift with the deposition of ZnSe shell. The fluorescence properties of obtained ZnSe: Fe/ZnSe QDs were investigated through photoluminescence (PL) spectrum. The results exhibited that the PL intensity of ZnSe: Fe/ZnSe QDs has been improved obviously compared with ZnSe: Fe QDs.
Failure Mode of a Fiber-reinforced Polymer-matrix Composite Laminate Subjected to Transverse Tensile
Authors: Wang Ben , Xue Xiang Chen , Hu Jiang Bo , Yu Tian Qi
Published: September 2019

To study the damage and failure mechanism of a canbon fiber-reinforced bismaleimides-matrix composite laminate subjected to transverse tensile, tensile experiments with acoustic emission technology on [90]16 laminates are implemented, while the analysis on signal parameters is conducted. Meanwhile, 2D microscopic RVE is modeled to simulate the plastic deformation on matrix and failure on interface by using ABAQUS. The study shows that it is mainly matrix that bears the load under the tensile subjected to [90]16 laminate. During the load, elastic deformation and plastic deformation occur in the material. And then the interface between fiber and matrix debond and failure. The results of experiment and stimulation agree well. It will uncover the process of damage’s initiation to evolution and extension in laminates.
Study on the relationship between lithology and reservoir characteristics of Yingcheng Formation in the southern Songliao Basin
Authors: Wen-qing Niu , Yun-liang Yu , Guang Yang , Ming-xuan Niu , Shan-shan MA
Published: September 2019

In order to deeply understand the relationship between the microstructural characteristics of volcanic reservoirs and the lithology of volcanic rocks, it provides important theoretical significance for the effective development of volcanic reservoir oil and gas fields. The microscopic characteristics of the volcanic reservoirs of the Yingcheng Formation in the Songliao Basin were analyzed by means of rock section determination, pore structure parameters analysis and casting thin section analysis. The results show that the target layer has low porosity and permeability, and the volcanic pore structure of different lithologies is different. Volcanic lava generally develops original gas pores, phenocryst dissolved pores, matrix dissolved pores, and tectoclase, while volcanic clastic rocks generally have developmental dissolution pores as the main feature. The micro-heterogeneity of volcanic reservoirs is generally strong, and the development of tectonic fractures is an important factor in changing the reservoir performance of volcanic rocks.
The Horizontal Variation Process and Rule of Bottom Waters Impacted by Cd Contents from Sources
Authors: Yang Dongfang , Su Chunhua , Wu Yunjie , Fan Bailing , Zhu Sixi
Published: September 2019

According to the investigation data of Jiaozhou Bay in 1991, the current content and horizontal distribution of Cd contents in bottom waters from central to southern Jiaozhou Bay were studied in this paper. The results showed that in May, Cd content in this area was 0.06-0.10μg/L, and Jiaozhou Bay was not polluted by Cd content. In August, the range was 0.06-0.38μg/L, and Jiaozhou Bay was not polluted by Cd content. In October, the range was 0.26μg/L, and there was no pollution of Cd content in Jiaozhou Bay. Hence, in May, August and October, Cd contents in this area were low, far lower than 1.00μg/L, the Case I Sea Water Quality Standard. In terms of Cd content, water is clean, not polluted by Cd content. In May, in surface waters of bay center, there is not source to transport Cd content. In bottom waters from bay center to northern bay mouth, Cd content decreased from 0.08μg/L in bay center to 0.06μg/L in northern bay mouth along with the gradients. In August, Cd was high as0.40μg/L in surface waters of bay center, mainly from atmospheric sedimentation, which is relatively high. In bottom waters from bay center to northern bay mouth, Cd content decreased from 0.38μg/L in bay center to 0.16μg/L in northern bay mouth along with the gradients. In this paper, the impact of Cd contents from sources on bottom waters was studied. Besides, the horizontal variation of Cd contents disclose the variation of bottom waters influenced by Cd contents from sources.
Horizontal Distribution Trend of Cadmium Content in Surface and Bottom Waters
Authors: Yang Dongfang , Li Haixia , Li Ye , Ren Haoyuan , Wang Qi
Published: September 2019

According to investigation data of Jiaozhou Bay in 1991, this paper studied the vertical distribution and seasonal variation of Cd in surface and bottom waters from bay center to northern bay mouth, and determined its seasonal distribution, variation range and horizontal distribution trend. The results showed that in May and August, in the entire waters from bay center to northern bay mouth, from surface to bottom, the Cd content range was 0.06-0.58μg/L, which shows that the water was not polluted by Cd. From May to August, in bay center, the seasonal variation of Cd content at surface and bottom was an order of summer > spring. In May and August, in northern bay mouth, the seasonal variation of Cd content at surface was an order of spring > summer, and summer > spring at bottom. The seasonal variation of Cd content shows that the Cd content at surface was not controlled by season, but source transport. Besides, Cd content at bottom was not controlled by season, but cumulative effect and dilutive effect when Cd content at surface reached seafloor. In Jiaozhou Bay, in surface and bottom waters from bay center to northern bay mouth, the horizontal distribution trend of Cd contents at surface and bottom was presented. The horizontal distribution trend of Cd content at surface and bottom was opposite in May and consistent in August. The results disclosed the principle of horizontal distribution trend at surface and bottom. Cd content was transported from sources reached surface, then rapidly and constantly sedimentated to seafloor. When Cd content reached high before being cumulated in seafloor, the horizontal distribution trend of Cd content at surface and bottom was consistent. On the contrary, it was opposite. In bottom waters, the accumulation of Cd content and its gravity features determined the consistent horizontal distribution trend of matter content at surface and bottom.
Effects of nitrogen fertilizer on soil chemical property in citrus orchard
Authors: Zhang Jiawen , Huang Jinqiu , Wang Zhihui , Wang Xun
Published: September 2019

The present research investigated the soil chemical properties applied nitrogen different amounts in Citrus orchard. The available nitrogen, available potassium and available phosphorus, as well as soil pH value and organic matter contents were determined. The results showed that the available nitrogen, available potassium, available phosphorus and organic matter in the soil were higher than the control.
Guilin Sustainable Development City Construction Countermeasure and Idea Design for SDGs in 2030
Authors: Zhang Yanjiao , Shao Chaofeng , Shi Yanmin
Published: September 2019

The GDP-driven urban development has created serious resource and environmental issues, and how to achieve sustainable urban development has become the focus of the world. Based on the 17 SDGs identified in the“2030 Agenda for Sustainable Development”, the connotation and index system of sustainable cities are analyzed. Then, focusing on the new situation for constructing the National Sustainable Development Agenda Innovation Demonstration Zone in Guilin City, it identifies the key index of sustainable city in Guilin from three aspects, which are economy, society, and environment. And considering the scale of tourism and its support for the local economy, some popular tourist cities, like Tianjin, Guangzhou, Shanghai, and Hangzhou, are selected for comparative analysis to diagnose the bottleneck of sustainable city construction in Guilin. Finally, this paper proposes the Countermeasures and ideas for building sustainable city in Guilin with the theme of sustainable utilization of landscape for SDGs.
Long and short duration heavy rainfall spatio-temporal patterns change and its contribution to total heavy rainfall in China
Authors: Kong Feng
Published: September 2019

Recent studies have noted a worldwide increase in the occurrence of extreme-precipitation events. Here we use daily rainfall data from 1951 to 2010 of 659 meteorological stations in China and on the basis of duration days defined long duration heavy rainfall. Results indicate that: on the spatial distribution, short duration heavy rainfall shows gradually decreasing phenomenon from the southeast coastal to northwest inland in China from 1951 to 2010. And long duration heavy rainfall is concentrated in the southeast coastal areas, such as Guangdong, Guangxi and Hainan. On the temporal change, the interannual and interdecadal short and long duration heavy rainfall both show increasing trend. In precipitation contribution ratio, the proportion of total heavy rainfall amounts to total rainfall amounts and total heavy rainfall days to total rainfall days are 6.1%∼27.7% and 0.6%∼27.7% respectively from 1951 to 2010 in China. Short duration storm to occupy the dominant position that the proportion of short duration heavy rainfall amounts to total heavy rainfall amounts and short duration heavy rainfall days to total heavy rainfall days are 75.9%∼89.4% and 75.6%∼89.4% respectively in the same period. Long duration heavy rainfall occupy a secondary position that the proportion of long duration heavy rainfall amounts to total heavy rainfall amounts and short duration heavy rainfall days to total heavy rainfall days are only 10.6%∼24.1% and 10.8%∼24.4% respectively. On the trend of precipitation contribution, China’s the contribution rate of total heavy rainfall to the total rainfall show increasing trend with contribution of rainfall amounts and rainfall days trend are 2.1%/10a and 0.2%/10a respectively. The contribution rate of short duration heavy rainfall to the total heavy rainfall show increasing trend with contribution of rainfall amounts and rainfall days trend are 0.5%/10a and 0.4%/10a respectively. On the contrary, the contribution rate of long duration heavy rainfall to the total heavy rainfall show decreasing trend with contribution of rainfall amounts and rainfall days trend are -0.5%/10a and -0.4%/10a respectively. The results suggest that the precipitation in China are changing to extremely accompanied by short duration storm increased significantly.
Spatial-temporal Dynamic Analysis of Landscape Ecological Security of Chishui River Basin in Guizhou Province, China
Authors: Feng Tu , Li Wangjun , Liang Qin , Xiao Qunying , Ren Jintong
Published: September 2019

Using the technologies of GIS and RS for the perspective of landscape ecology, the characteristics of landscape ecological security changes of Chishui River Basin in Guizhou Province from 1995 to 2015 were analyzed. The results showed that: (1) In the past 20 years, the utilized land types in the study area were changed greatly. The disturbance of human factors on utilized land change was serious. The area of construction land was increased rapidly, the area of forest land was decreased, while the cultivated land increased first and then decreased. (2) In the past 20 years, the landscape fragmentation index and landscape separation index of other utilized land types were increased except the construction land. The fractal dimension indices of other landscape types were increased, but the change was not obvious. With the continuous development of economy and society, the disturbance of human activities to various landscape types was increased. (3) From the point of view of temporal and spatial changes of landscape ecological security, the overall situation of landscape ecological security in the study area was better, and the area with high ecological security was increased in the past 20 years. Less than 10% of the area was in low ecological security, but the overall trend was increasing, and the problem of ecological security was serious. (4) In the past 20 years, the spatial aggregation of towns with similar landscape ecological security in the study area decreased first and then increased, and the spatial aggregation types were low to low and high to high .
Comparative Study on the Physicochemical Characteristics and Fatty Acid Composition of Cashew Nuts and Other Three Tropical Fruits
Authors: Liu Yijun , Li Xiaofei , Liang Yuen , Liang Jiemin , Deng Dongyan , Li Jihua
Published: September 2019

In order to investigate the differences of three kinds of special fruits between cashew nut oil and macadamia nut oil in the aspects of physicochemical properties and fatty acid composition, the acid value, iodine value, peroxide value, saponification value, non-saponification value, moisture and The volatile matter, pH, colour and fatty acid composition were compared. The results showed that the three oils had significant differences, and the macadamia had the highest oil content. The macadamia nut and cashew nut oil had a significant difference in oil yield. The price, iodine value, moisture and volatile matter content and colour difference were significant. The macadamia nut oil had the lowest acid value. The cashew nut oil had the highest iodine value and the lowest moisture and volatile matter content. The difference of the fatty acid composition of the three oils was that camellia seed oil contains a-linolenic acid, the cashew nut oil contains linoleic acid, and the macadamia nut oil contains lauric acid and myristic acid. This study identified the significant differences in oil content, extraction rate, physicochemical properties, fatty acid composition and relative content between the three oils, which provided basic data support for the development of functional products in the later period.
Study on Intrinsic Factors Affecting Production Technology of Low Carbon Agriculture and Forestry Plants
Authors: Luo Le , Zhou Ying , Li Qi , Mao An
Published: September 2019

The management of low-carbon agriculture and forestry plant farms is an important path to promote the development of agricultural industry. This study used binary logistic regression method to construct a logistic regression model of low-carbon agriculture and forestry plant production status. The various conditions of low-carbon agroforestry production were analysed. The various internal factors affecting the evaluation of the production status of low-carbon agroforestry plants and the farm production as well as production status were discussed and comprehensively evaluated. Six main influencing factors were summarized and analysed, which were seedling quality, seed market supervision, fruit and vegetable standardization, fruit and vegetable market supervision, fruit and vegetable market infrastructure, post-harvest treatment of fruits and vegetables, and the promotion of low carbon farmland and plant production.
Residual and migration characteristics of norfloxacin in two mangrove ecosystems
Authors: Li Ling , Liu Yu , Sun Qinyu , Yu Fei , He Shuwen
Published: September 2019

Direct discharge of aquaculture wastewater in coastal areas could increase concentrations of antibiotics in coastal mangrove forests. This study focused on the Gaoqiao Mangrove Nature Reserve in Zhanjiang City, Guangdong Province. Norfloxacin (NOR) residues in rhizosphere sediments, plant roots, branches, and leaves of two dominant mangrove communities, Rhizophora stylosa and Avicennia marina, the correlation between physical properties of rhizosphere deposition and residual NOR in sediments, and NOR accumulation in the root system were analyzed. Significant differences were noted in NOR residues in rhizosphere sediments of R. stylosa and A. marina, with higher NOR concentrations than those in other wetland sediments locally and abroad. NOR accumulation in R. stylosa was higher in the branches than in the roots and was also significantly higher than that in A. marina. Thus, both species could accumulate NOR from the environment with R. stylosa showing a stronger potential to purify the environment. Cation exchange capacity and total organic carbon could affect NOR distribution in the rhizosphere sediment, and total organic carbon content could reduce NOR uptake by mangrove roots. This study contributes to research on the migration and adsorption characteristics of antibiotics in mangrove wetlands.
Discussion on Defense Safety Design for Rural-Urban Fringe Zones in Changchun in the View of Criminal Pattern Theory — A Case Study of A Typical Zone Dominated by Industrial Lands in Changchun
Authors: Wang Keqi , Sun Zhaorui , Liang Baixue
Published: September 2019

The rural-urban fringe zones are the by-products of rapid urbanization in China. They are specific regions where the urban and the countryside permeate mutually. On account of their ambiguous, dynamic, complex and farraginous characteristics, there are many personal defense safety hidden danger, and there are many vulnerable spaces and hot spots for crime as well. The author summarizes four kinds of hot spots in view of defense safety, namely, spatial nodes, linear paths, transition edges and spatial areas. Using the crime pattern theory and the crime template proposed in paper, the author analyzes the defense safety problem on four kinds hot spots in a typical rural-urban fringe zone dominated by industrial lands in Changchun and finally puts forward feasible strategies that reverse the crime template.
Effects of Temperature on Growth and Quality of Dormancy-released Sedum aizoon L.
Authors: Chen Yan , Yang Luxi , He Zhongqun
Published: September 2019

The effects of recovery growth were compared by measuring the biomass and quality indices when dormancy-released Sedum aizoon L. were treated at 25°C, 20°C and 15°C respectively. The results showed that with the increasing temperature, the plant height and aboveground fresh weight all showed an upward first and then downward trend. The contents of chlorophyll, carotenoids, calcium and zinc all showed an upward trend, while magnesium and iron all showed a downward first and then upward trend in fresh food part. The contents of soluble protein, vitamin C, free amino acid and flavonoid all showed a downward trend, while total soluble sugar, caffeine and oleanolic acid all showed an upward first and then downward trend. The plant height, aboveground fresh weight, the total chlorophyll to carotenoid ratio, the contents of total soluble sugar, caffeine and oleanolic acid were all the highest under 20°. In conclusion, the best recovery growth temperature was 20° for dormancy-released Sedum aizoon L.
Physiological and ecological responses and changes of Phaeodactylum tricornutum under long-term stress of naphthalene
Authors: Cong Sha , Yuelu Jiang
Published: September 2019

Naphthalene, as a common polycyclic aromatic hydrocarbon (PAHs), attracts broad attention due to its toxicity to human and marine organisms. This study investigate the effects of naphthalene on growth, maximum photochemical efficiency (F
v
/F
m), total esterase activity and reactive oxygen species production of Phaeodactylum tricornutum. The study explored how algal physiological characteristics change under naphthalene’s long-term exposure and analyzed the correlation between photosynthetic efficiency with growth, total esterase activity and reactive oxygen species production, respectively. The study shows that low-concentration naphthalene promotes slightly or doesn’t affect algal growth, total esterase activity and reactive oxygen species while it promotes F
v
/F
m significantly. On the other hand, high-concentration naphthalene inhibits algal growth, total esterase activity and F
v
/F
m significantly, while it stimulates reactive oxygen species production and the stimulation increases with time. The study also shows that growth and Fv/Fm of P. tricornutum are correlative and the correlation is related with naphthalene concentration. F
v
/F
m of P. tricornutum is significantly positively-related with total esterase activity, while is significantly negatively-related with reactive oxygen species.
Isolation and Identification of Two Antagonistic Actinomycetes against pomegranate wilt pathogen
Authors: Yinli Zhou , Wei Yang , jianbo Bai , qiong Kong , Xianqi Hu
Published: September 2019

Pomegranate wilt is a soil-borne disease relatively difficult to prevent. In this study, actinomycetes with strong antagonistic activity against pomegranate wilt pathogen were separated and screened from the soil samples collected from Yunnan Mengzi Wanmu Pomegranate Garden and Jianshui Pomegranate Garden. The indoor bacteriostatic radius of strain MZ12 against pomegranate wilt pathogen was 11 mm while the indoor bacteriostatic radius of strain MZ1 against pomegranate wilt pathogen was 7.25 mm. Combined with the characteristics, morphological observation and 16S rDNA sequence analysis of the two strains on identification medium, MZ12 was initially identified as Streptomyces cinnamonensis, and MZ1 as Streptomyces fulvissimus.
Application Research of Benford’s Law in Testing Agrometeorological Data
Authors: Qin Lang , Han Shuqing , Xing Liwei , Zhang Jianhua , Zhang Jing , Yang Ruyi , Wu Jianzhai
Published: September 2019

Benford’s law is an effective tool to test the quality of data sets. In order to strengthen the research on the quality evaluation of agrometeorological data, this paper empirically analyzed the precipitation data sets of China from 1951 to 2015 from the time, space and time staggered dimensions. It was found that the overall and local quality of precipitation data sets in China was high. Further improvement and expansion of Benford’s law’s application in the future can help to detect and control the quality of agricultural data efficiently and improve the utilization rate of agricultural data.
Research on the Optimization of Agricultural Industrial Structure in Hainan Province Based on Shift-Share Method
Authors: Li Yao , Fang Heyuan
Published: September 2019

This paper conducts an empirical analysis of the agricultural industrial structure in various regions of Hainan Province in China from 2009 to 2017 on the basis of the shift-share method. The results show that the agricultural industries in all areas of Hainan have varying growth rates, which jointly promote the agricultural development of Hainan Province. The planting industry and fishery in coastal areas have stronger structural effects and regional advantages. Through further analysis of the changes in the internal structure of the planting industry and fishery, it is found that the optimization effect of industrial structure is significant, and that high quality and sustainable development are basically realized. Based on the conclusions of the above empirical analysis, the countermeasures and suggestions for the optimization of agricultural industrial structure in Hainan Province are proposed.
Effects of Abscisic Acid on Soluble Sugar Accumulation of Cyphomandra betacea Seedlings under Cadmium Stress
Authors: Li Zhiyu , Li Jiayu , Liu Yujia , Lu Yuyang , Huang Kewen , Lin Lijin
Published: September 2019

In this study, the effects of different concentrations (0, 1, 5, 10, and 20 μmol/L) of abscisic acid (ABA) on soluble sugar accumulation in Cyphomandra betacea seedlings under cadmium stress were studied. The results showed that spraying 10 and 20 μmol/L ABA could effectively increase the content of soluble sugar in roots, stems, leaves and aerial parts of C. betacea seedlings. Spraying 1 and 5 μmol/L ABA reduced the soluble sugar content in roots, stems, leaves and aerial parts of C. betacea seedlings. Therefore, the use of 20 μmol/L ABA can increase the accumulation of soluble sugar in C. betacea seedlings.
Coordinated Development of Energy, Environment and Economic Systems (3E) - Based On a Comparison of Regional Differences
Authors: Xiao-wei Zhu
Published: September 2019

By constructing the 3E symbiosis system model and the 3E system coordination degree evaluation model, this paper measures the coordination degree of 3E system in the three regions of Beijing-Tianjin-Hebei Urban Agglomerations(BTH), Yangtze River Delta Urban Agglomerations(YRD) and Pearl River Delta(PRD). The study found that the 3E system coordination degree in the three regions is in an intermediate coordination state, and the energy system and the environmental system are lagging behind. This paper provides assistance for understanding the coordinated development of China’s 3E system, and provides empirical support for China’s promotion of ecological civilization.
RETRACTED: Research on the Construction of Early Warning Index System of Network Public Opinion Emergency Based on Computer Simulation
Authors: Hongbing Ge
Published: September 2019

Under the current social background of our country, the dissemination environment, dissemination background, audience characteristics, media environment and event types of network public opinion are constantly developing and changing, and the influencing factors will also have new changes. The early warning index system of network public opinion emergencies is an important part of the crisis management of network public opinion. The analysis of network public opinion is based on the complete and accurate grasp of network public opinion. The early warning of network public opinion emergencies is based on the full exploitation and utilization of network public opinion data. Through the analysis and judgment of public opinion, the early warning mechanism of network public opinion emergencies can be improved. Computer simulation is a fast and economical important research tool, and the effectiveness and accuracy of computer simulation depends on the performance of computer simulation software tools. Using computer simulation and simulation of the process of user concept in event propagation, dynamic evolution simulation of events is analyzed according to the results of user concept, and hot events are identified.
The Climatic Characteristics of surface salinity distribution in the East China Sea from 1981 to 2010
Authors: Fen Xu , Kang Jiancheng , Chen Zhang
Published: September 2019

Choosing the surface salinity from SODA database during 1981 to 2010, the climatic distribution characteristics of surface salinity at the continental shelf of the East China Sea for the new 30-year climate reference period (1981-2010) were analyzed, to lay the foundation for further study of climate change. The results showed that: (1) The average salinity of the surface layer in the study area increased gradually from the Yangtze River estuary to the southeast. The isoline has a circular distribution near the Yangtze River estuary, and it is generally northeast-southwest in other sea areas of the study area; (2) In the inter-monthly change, the highest salinity in March is 27.38psu; the 5-8 month is the low salinity season, and the lowest salinity in August is 22.30psu; September-December is the season of salinity rise; (3)The annual amplitude of salinity has two regional changes: the largest positive center is located in the northeast of the Yangtze River estuary, the largest negative center is located in the waters near Hangzhou Bay south of the Yangtze River estuary.
Coupling Coordination Evaluation of Water-Soil Resource Utilization and Eco-environment: The Case of Southeast Yunnan Province
Authors: Lv Jie , Yuan Xiping , Gan Shu
Published: September 2019

Understanding past and current relationship between water-soil resources utilization and eco-environment is essential for predicting how these relationships may be affected by future human activities change. Combined with GIS technology and statistical analysis, based on the actual situation of water shortage, limited land resources and the prominent contradiction between the supply and demand of water-soil resources in the karst mountain area of southeast Yunnan province. This paper studies the coupling coordination relationship between the water-soil resources utilization and eco-environment in karst rocky region and evaluated the coupling coordination degree between the utilization of water-soil resources and the eco-environment by using the entropy weighting method and the system coupling theory. Results show that the model estimated the spatial and temporal variation between water-soil resources utilization and eco-environment parameters precisely. On this basis, the stress response mechanism of social and economic development and water-soil resources under the constraint of water-soil resources is further discussed by using impulse response function simulation, so as to provide theoretical and technical support for the sustainable development of regional water-soil resources.
Cluster Analysis of Deep Water Sound Speed Profiles in Indian Ocean
Authors: Wang Hua , Li Yunbo , Li Qinghong , Yu Xiangjun
Published: September 2019

Sound speed profiles in the ocean have a significant impact on the acoustic propagation, thus affecting the sonar detection performance. Sound speed profiles have characteristics of positional and seasonal distribution. In order to guide the sonar detection, use WOA13 dataset, calculate the number of categories of sound speed profiles by hierarchical clustering method, classify sound speed profiles categories and typical sound speed profile structure of various categories in different seasons by fuzzy c-means clustering. It is concluded that there are 7 categories of sound speed profiles in Indian ocean: Antarctic Water category, Antarctic Transition Water category, Sub-Antarctic Transition Water category, Sub-Antarctic Water category, Sub-Tropical Water category, Tropical Divergence Zone category and North Indian Ocean Water category. The distribution area of these categories are generally zonal distribution. Sub-Tropical Water category, Tropical Divergence Zone category and North Indian Ocean Water category have significant seasonal variations. The seasonal variation of other categories are not significant.
Major types and Metallogenic model of Early Cretaceous Pb-Zn and associated metal deposits in the southern Great Xing’an Range, NE China
Authors: Wang Chengyang , Sun Zhenjun , Bai Xiangdong , Liu Guanghu , Liang Xinyang , Li u Jie
Published: September 2019

The southern Great Xing’an Range (SGXR) is one of the most important non-ferrous metal ore concentrating areas in China, and a large number of Pb-Zn and associated metal deposits have been found and mined in this area. The Early Cretaceous deposits of SGXR can be divided into three principal types according to their geological characteristics: skarn type deposits, porphyry type deposits and hydrothermal vein type deposits. In this contribution, we list some important Early Cretaceous deposits in the SGXR and summarize their geological characteristics. Research of stable isotope and fluid inclusion reveal that the sources and properties of ore-forming fluids varied between different types of mineral deposits, while the sources of ore-forming materials of different deposits are similar(characterized by deep-seated magmatic activities). We therefore conclude that the Early Cretaceous porphyry, skarn and hydrothermal vein type deposits in SGXR belong to a unified metallogenic series and developed a synthetical model for these deposits.
Research on the Cavitation in the Snapping Shrimp: A Review
Authors: Shimu QIN , Yang Yuliang , Junqi QIN , Changchun DI
Published: September 2019

The snapping shrimp is a member of the family Alpheidae, which is characterized by having asymmetrical claws. When it comes to danger or when it finds prey, the snapping shrimp will close its snapping claw rapidly, generating cavitation bubbles to stun or kill the prey instantly, accompanied by huge energy. This unique biological characteristic was studied since the 1950s, mainly on three aspects, the structure of snapping claws, cavitation jet properties of snapping shrimp and the mechanism of cavitation in snapping shrimp. The article summarizes the progress and results of the research from the above three aspects, and proposes the bionic technology is the research direction of cavitation by snapping shrimps in the future, which is based on research of the biological structure of the snapping claw.
Changes of virtual water trade based on input-output model in Shandong Province and environment response in representative region
Authors: Li Fengli , Sun Qing , Wang Weiping , Qu Shisong , Ni Ludong , Wang Chen
Published: September 2019

The purpose of this paper is to analyze the change trend of the virtual water trade for a 15-year period in Shandong Province, and to discuss how ecological environment is affected by numerous virtual water trade in a representative region. To carry out the analysis, the authors derived a water balance model from lateral economic balance formula in the input-output table. The model was combined with the economic data from Shandong Province’s input-output tables and environmental Kuznets curve for an analysis of the change trend of virtual water trade of different industries. Findings - The agriculture is the largest industry that consumes water among three industries, and it plays a conclusive role on whether Shandong Province export virtual water or import virtual water. The virtual water of the province was exported in 1997 and 2002 and imported in 2007 and 2012. This situation was in line with the change of the environmental Kuznets curve and such transformation can be considered a kind of repair to the ecological environment. When the net output volume of virtual water was zero, the total output value of agriculture was 257.86× 109 Yuan. About the representative region (Shouguang City), the annual irrigation water of vegetables is approximately 1.6× 108 m3, of which 84.5% water is exported to other areas in the form of vegetable trade. The virtual water quantity exported in the form of vegetable accounted for approximately 73% of the annual average groundwater resources. Shandong Province has insufficient water resources, and this study can provide a scientific basis for allocating water resources and repairing ecological environment.
Land Use Efficiency and its Change of Vietnam Based on DEA
Authors: Danni Zhou
Published: September 2019

Data envelopment analysis was used to analyze the land use efficiency of Vietnam and its six regions in 2011-2017, and then the Malmquist index was used to investigate the changes of the land use efficiency of Vietnam and its six regions and 63 provinces and cities in 2011-2017. The study found that the overall land use efficiency in Vietnam is low and there are serious regional imbalances, but the overall situation is improving year by year.
Analysis of the effectiveness of ecological protection work in Dujiangyan area after 5.12 earthquake
Authors: Zhao Zhongguo , Luo Liqing , Zhu Jiahao , Gou Qingxin , Liu Yuming , Zen FengQing
Published: September 2019

Dujiangyan, a county-level city in Chengdu, is located at the outskirts of the Minjiang River on the northwestern edge of the Chengdu Plain. As a national health city, the ecological protection status of Dujiangyan City has received much attention. From the five aspects of ecological economy, ecological environment, ecological awareness, ecological governance and landscape maintenance, we will make a comprehensive consideration and evaluation of the ecological protection status of Dujiangyan area, so that the area can make more obvious achievements in ecological aspects.
Research on Agricultural Production Efficiency of Guizhou Province Based on DEA-Malmquist Model
Authors: Huang Dongbing , Wang Xinlei
Published: September 2019

The continuous improvement of agricultural production efficiency is an important guarantee for the development of modern agriculture. Based on the input-output data of agricultural production in 9 cities of Guizhou from 2005 to 2014, the agricultural production efficiency was analyzed by the DEA-Malmquist index method. It shows that: Firstly, the total factor productivity (TFP) of agriculture in Guizhou showed a decline trend, the growth rate of total factor productivity was -1.9%, and the main reason of the decline is the reduction of pure technical efficiency and scale efficiency. Secondly, the leading factors of total factor productivity decline are different in different regions of Guizhou. Thirdly, the main reason for the fluctuation of Malmquist index with time is technological progress, and technological progress plays a important role in improving productivity. Scale operation, the enhancement of management level, and the enhancement of scientific and technological innovation can be used to enhance agricultural productivity.
A Research Review of Corporate Green Accounting Information Disclosure
Authors: Ma Jundong , Ma Juntao
Published: September 2019

Environmental issue is always a hot topic in the world. Many countries has begun to study the green accounting since the last century. This review focuses on the problems and solutions to the implementation of green accounting information disclosure, shedding some light on the development of green accounting in China. By discussing the difference between China and other developed countries in the process of implementation of green accounting information disclosure, this study gets some suggestions for the implementation of green accounting information disclosure in China, which includes establishing a reasonable green accounting system and improving enterprises’ environmental responsibility, also, obtains the differences in the development of green accounting between China and other countries at the end of this paper.
Exploring in the approach to rural revitalization in the view of green development
Authors: Xingping Liu
Published: September 2019

Rural revitalization is a major strategy for rural economic and social development. In the new era, rural revitalization must break away from the traditional mode of development and take the road of green development. This is not only to meet the people’s growing needs for beautiful ecological environment, but also the inevitable requirements of rural revitalization. The general requirement of village revitalization are prosperous industry, ecological liveable, civilized local style, effective governance, and prosperous life. It contains the requirement of green development. Therefore, the rural revitalization must also be a multi-dimensional and multi-perspective integration from the perspective of green development, forming a pattern of mutual promotion and common prosperity that protect the ecological environment in the rural revitalization and promote the rural revitalization in the protection of ecological environment.
Analysis of Multiple-agents’ Symbiotic Patterns of Cultural Community Tourism in Minority Ethnic Area:A Case Study on Tu Nationality Hometown Park of Huzhu, Qinghai
Authors: Tang Zhongxia , Xiang Cheng , Shao Li , Ren Xixian
Published: September 2019

As for the tourism development of cultural community in ethnic area, the coexistence(symbiosis) of both the local tourism and local culture is not only connected with the relevant agents of them but also the relation of the relevant agents themselves. This is because harmonious coexistence(symbiosis) of the various agents is the elementary precondition of the ethnic cultural community tourism development. Symbiosis Theory was chosen as the theoretical perspective in this thesis, and Tu Nationality Hometown Park of Huzhu was selected as the study area. Then, symbiotic relationships and patterns of the various tourism agents were put into quantitative analysis. The findings displayed as the following: firstly, the four agents’ mutual characteristic symbiotic degree δM belongs to(ϵ) [0.719, 1.390], which illustrates that there exists the symbiotic relation between the every two agents of the four mutual agents and the symbiotic relations are totally positive symbiosis; secondly, the symbiotic coefficient 9m belongs to(ϵ) [0.34, 0.66], which approaches to 0.5 except the symbiotic coefficient of G-R(0.34). This illustrates that the mutual incidence of the other agents is basically the same except G-R; thirdly, the symbiotic relevancy of each agent approaches to one another, the symbiotic relevancy§m belongs to(e) [0.88, 1.08] concretely as R=E>G>T for the perspective of the tourism subject(tourists); lastly, the mutual behavioral patterns of the four agents of Tu Nationality Hometown Park of Huzhu belong to the patterns of positive reciprocal symbiosis(the positive symbiotic pattern of “residents-leading, enterprises-boosting” (REGT).
Jingmen City’s practical research on leading high-quality economic development with scientific and technological innovation
Authors: Liu Yujie
Published: September 2019

At present, China’s economy has shifted from a high-speed growth stage to a high-quality development stage. Taking Jingmen as the research object, this paper sorts out the status quo and economic development of science and technology innovation in the city, and analyzes the historical logic, practical logic and theoretical logic of scientific and technological innovation leading high quality development, and proposes ideas for the high-quality development of Jingmen City.
Project portfolio management system, concepts and approach foundations
Authors: Dezhkam Majid , Xue Suduo , Liu Zhansheng
Published: September 2019

Project portfolio management is an approach based on the knowledge of project management, in which the management system focuses on a combination of projects with specific goals and conditions and is considered to be a higher level of project management in organizations. In this management system, the main objective is to design and implement projects that can ultimately facilitate the achievement of the project organization for its strategic goals. Selection of suitable projects, proper allocation of limited resources of the organization, realization of the emphasis of the strategic statement, coordination and synergy in the portfolio of organizational projects and the provision of health The organizational relations of project managers are among the most important theoretical foundations of this system. In this paper, the purpose of presenting concepts related to this approach is to discuss such definitions, models, the process of establishing the maturity model of the project portfolio management system, and how to form and collate the project portfolio. The description of the nature of the Project Management Offices (PMO) and the system Project Management Office (SPO) is another topic that will be addressed in this article.