bluuebunny/crossref_metadata_2025_split huggingface dataset:
Meso-damaged VIB analysis for whole failure process of rock
Authors: Jiang Junling , Ke Changren 
Published: December 2019

Abstract
Based on the VIB model and the similarity of VIB two parameters cohesive force law at micro scale and the rock’s stress-strain curve at macro scale, a density evoluting function
D(θ)
about the elements softened and damaged at micro scale is proposed. The fracture informations of rock material are incorporated into the constitutive equations which in incorporating the density revolving function
D(θ)
, two kinds state of the elements—air element and solid element are proposed to describe the process of micro element. According to the consistence hypothesis between AE accumulations and the damaged elements, the AE simulation of rock fracture process is realized. The reasonableness of meso-damaged VIB analysis for whole failure process of rock is proved by a rock’s uniaxial compression test.
Evolution characteristics and variability analyzation of rainfall and runoff based on time scale
Authors: Wang Caiyuan , Yang Zhongshan , Zang Min , Wang Yajuan 
Published: December 2019

Abstract
With the rapid development of economy, the hardening area of city is increasing, which leads to the change of the runoff production law in the city. In order to understand the change of urban rainfall and runoff in the changing environment, the control basin of the Dahongmen hydrological station of Liangshui river in Beijing was selected as the research object. Mann - Kendall nonparametric rank correlation test, Non-parametric Pettitt test and qualitative and quantitative models of the Variable fuzzy set were used to study the evolution characteristics and variability of rainfall and runoff based on the measured data from 1980 to 2015. The results show that the flood peak and flood amount in the 1990s were smaller than those in 1980s, and the flood peak and flood amount were significantly greater than those in the 1980s and 1990s after 2000. The actual maximum flood peak and flood amount had significantly rising trend. For variability analysis, the mutation point of annual rainfall and runoff occurred in 1996 and 1993 respectively. They did not change qualitatively on the time scale, but only showed the quantitative variation. This study results can provide a basis for rational decision of flood prevention departments.
Analysis of Deformation of Ground and Connected Aisle with the Influence of Sump-Pit Excavation in the Aisle
Authors: Yang Luming , Huang Jianhua , Wang Yunchen 
Published: December 2019

Abstract
The excavation of connected aisle is one of the key risks for the construction of subway in the coastal soft clay layer. The excavation of sump-pit will adversely affect the deformation of the ground and connected aisle, increase the risk of the project. The finite element software ABAQUS is used to carry out numerical simulation research on the excavation of sump-pit. The influence of deformation of ground and connected aisle were analyzed by the method of changing the position of sump-pit excavation. The result showed that: the most significant influence of sump-pit excavation was crown settlement, the second important influence was ground settlement, and the influence of headroom convergence was slight. The maximum ground settlement increased by 7% and the maximum crown settlement by 13% if the sump-pit was built in the middle of connected aisle.
Research on the Influence of The Vertical Compressive Static Load Test of The Pile by The Tidal Fluctuation
Authors: Tianyun Liu , Shuangshao LI 
Published: December 2019

Abstract
The settlement of pile top had risen continuously and stabilized difficulty during the vertical compressive static load test of single pile in the tidal fluctuation area. Based on the principle of effective stress, the phenomena can be explained that the reduction of soil effective stress caused by the rising tide level leaded to the decrease of the bearing capacity of the pile, and the reasonable suggestions are given to the designer of the pile foundation affected by the tidal fluctuation.
Study on hydro-mechanical coupling properties of clay rock in Tamusu - the pre-selected area of high-level radioactive waste repository
Authors: Liang Haian , Hu Qingbo , Wang Yu , Chen Haikang , Zhang Longpeng , Liu Chao 
Published: December 2019

Abstract
The research of hydro-mechanical coupling properties is of great significance for the design of high-level radioactive waste repository. In this paper, the permeability evolution test of Tamusu clay under full stress-strain condition is carried out. Based on the basic theoretical equation of hydro-mechanical coupling, the relationship between the permeability and stress of the Tamusu clay is analyzed. Combineed with the results of in-situ stress measurement in the Tamusu area, the excavation simulation of the roadway with a burial depth of 500 m in the area is carried out, and the change law of pore water pressure in the surrounding rock near the field is analyzed. The results show that when the osmotic pressure is constant, the peak strength increases and the permeability decreases with the increase of confining pressure. When the confining pressure is constant and osmotic pressure increases, the result is reversed; The permeability of Tamusu clay is affected by confining pressure more than the osmotic pressure, and the relationship between permeability and axial stress follows the negative exponential function.
Preliminary study on disaster prevention planning system from the perspective of high-density urban environment
Authors: Xie Ziang , Dai Shenzhi 
Published: December 2019

Abstract
High-density development mode is a realistic and rational choice of urban space in the process of high-speed urbanization in China. However, as the disaster-bearing body of urban disasters, the high-density characteristics of urban space also make it vulnerable and sensitive in dealing with disasters. Therefore, how to strengthen the protection of urban disaster prevention facilities and continuously improve the adaptability and flexibility of the city is an important factor to promote the sustainable development of high-density cities, which has great research value. Based on this, this paper aims to study and summarize the disaster characteristics of the high-density global metropolis, and preliminarily explore the content of disaster prevention planning system in high-density urban environment, so as to provide a pertinent research basis for the relevant issues of high-density urban disaster prevention.
Distribution Characteristics and Pollution Assessment of Heavy Metals in Sediments of Zhushan Bay
Authors: Chen Fangyuan , Chen Xinmin , Zhu Fan , Sun Qi 
Published: December 2019

Abstract
The distribution characteristics of heavy metals in the columnar sediments of Zhushan Bay, Taihu Lake are studied. The Pearson correlation analysis and principal component analysis are carried out, and the pollution of heavy metals is evaluated. The highest mean concentration is found for zinc (Zn), followed by chromium(Cr), copper (Cu), nickel (Ni ), lead (Pb), arsenic (As), cadmium (Cd). The content of heavy metals in estuaries and open water is significantly higher than those in aquatic-terrestrial ecotone, and pollution accumulation occurs in the deep sediments. There is a significant positive correlation between Cr, Cu, Ni and Zn, which indicates their similar sources. The geoaccumulation index (Igeo) shows that Cr has the highest value, with moderately to heavily polluted. The pollution situation of the study area is improved after the desilting project of Taihu Lake, but the potential ecological risk index (RI) is still moderate to severe, among which Cd is the single factor that contributes the most to RI.
Numerical study on noise reduction of wind turbine blade vortex generator
Authors: Gang Li , Zhengtao Zhang , Pingguo Zou 
Published: December 2019

Abstract
At present, wind power is widely used, especially in near-residential areas, and blade noise has become an important factor affecting the installation and operation of the unit. Vortex Generator is a new technology that has been used by wind turbine blade manufacturers in recent years. At present, there are few studies on the changes of blade aerodynamic noise after the installation of vortex generators in China. In order to study the influence of vortex generators on aerodynamic noise, the flow field is simulated by numerical calculation method before and after the blade is installed with vortex generators. The visualization results are output and compared, and the parameters such as vorticity and pressure are analyzed. Secondly, based on the detailed parameters of the flow field, FW-H equation is used to calculate the sound source propagation, and the sound pressure level spectrum of the blade before and after the vortex generators added is obtained. The research shows that the vorticity increases in the vicinity of vortex generators and the downstream region, which promotes the mass and energy exchange between the upper fluid and fluid in the boundary layer, so the boundary layer separation is delayed, and the wake vortex subsides. The aerodynamic noise is low frequency noise, and the addition of vortex generators can significantly reduce the aerodynamic noise of the blade.
Influence of gas counter pressure injection molding parameters on shrinkage ratio of plastic part
Authors: Li Shuai , Ma Xiaofei , Wang Rui , Sun Xuemei , Sun Chengtong 
Published: December 2019

Abstract
Gas counter pressure (GCP) technology can increase the pressure of melt before flowing effectively. Therefore, it has a potential to reduce shrinkage ratio and improve dimensional accuracy of conventional injection molding part. The effect of different process parameters on the shrinkage ratio of molded parts was studied by means of S/N ratio and ANOVA. The results showed that GCP pressure was the most important factor affecting the shrinkage ratio of molded parts, followed by packing time, injection pressure, mold temperature, melt temperature and packing pressure. Meanwhile, the most optimal combination of process parameters and 1.27% shrinkage ratio of parts were obtained. Finally, the influence of different process parameters on the shrinkage ratio of molded parts was also analyzed.
Effect of Plastic Film Mulching on Fruit Quality of Citrus grandis cv. ‘Hongroumiyou’ and ‘Sanhongmiyou’
Authors: Wang Yan , Fu Xiaoke , He Wen , Chen Qing , Wang Xiaorong 
Published: December 2019

Abstract
Plastic film mulching (PFM) around fruit trees could effectively improve fruit quality by promoting fruit coloration and sugar accumulation. ‘Hongroumiyou’ and ‘Sanhongmiyou’ are mutated from Citrus grandis cv. ‘Guanximiyou’ possessing attractive appearance, rich nutritional ingredients. When they are introduced into Sichuan Province, the fruits revealed lower sugar accumulation and higher acid content than that in Fujian Province. We compared the fruit quality by mulching at 55, 85, 115, 145, 175 days after flowering. The results showed that mulch treatment had no significant effect on the external quality of ‘Hongroumiyou’ and ‘Sanhongmiyou’. While it could effectively improve the internal fruit quality, including promotion of total soluble solid and vitamin C, and decrease of total acid. The best effect on the improvement of fruit quality was mulched at 115 days after flowering for ‘Hongroumiyou’ and 145 days after flowering for ‘Sanhongmiyou’. In addition, mulching cultivation also avoided tree death resulted from the rootrot atrophy because of a long-term flooding. It is important to promote film mulching cultivation in the pummelo production in Sichuan Province.
Current Situation and Problems of MBR Treatment Process in Dye Wastewater
Authors: Li Qin , Dong Kun , Tu Yue , Jiang Lei , Li Xiangmin , Li Haixinag 
Published: December 2019

Abstract
In most areas in China, the poor quality of printing and dyeing wastewater discharged from dyeing, papermaking and silk factories have caused a series of environment pollution and health problems. So the optimization of the dyeing wastewater effluent process has become imminent. MBR is a new type of wastewater treatment technology in recent years, MBR can efficiently treatment printing and dyeing wastewater. The paper introduces several basic types of MBR treatment process in terms of the working principle, advantages and current situation of treatment in the dye wastewater applications, including AO-MBR Process, Coagulation Sedimentation-Micro electrolysis-MBR Process, MBR-RO Process, MBR Gravity Drain Process, Submerged Membrane Bioreactor (SMBR) Process and Direct Contact Membrane Distillation Process. Through analysis and summary, the MBR treatment process in dye wastewater should focus on solving the problem of removal of the final product. The effective combination of MBR technology and other chemical and physical treatment processes can provide important guiding significance for the future dye wastewater from the end treatment to the control of source pollution.
Research Progress of CO2 Flux in Saline and Alkali soils in Arid area
Authors: Liu L J , Jiao Y , Yang W Z , Yu J X , Song C N , Yu Y Z , Yang J 
Published: December 2019

AbstractStudy on CO2 flux of saline and alkali soil in arid area is of great significance to greenhouse gas control. At present, the main research contents at home and abroad focus on the ways of CO2 sequestration and migration and transformation in saline-alkali soils in arid areas. The influencing factors of CO2 flux in saline-alkali soil in arid area include soil temperature, humidity, pH, EC and soil physical and chemical properties. Inorganic carbon equilibrium process of CO2(g)—CO2 (aq)—HCO3-(aq)—CaCO3(s) is common in soil, its dynamic process dominates the inorganic carbon exchange at the ground-gas interface. This is of great significance to the study of soil-atmospheric carbon circulation system for exploring the principle and mechanism of greenhouse gas change in order to slow down global warming and strengthen the management and control of greenhouse gases. It contributes to China’s energy conservation and emission reduction planning and international carbon balance negotiations.
Abundance and diversity of pollinators on green roofs are affected by environmental factors
Authors: Wu Tingfeng 
Published: December 2019

Abstract
Bees provide a variety of ecological services for urban ecosystems, while green roofs can also be of high value to bees through providing habitats and foraging sites. In this study, four hypotheses about impacts on abundance and diversity of pollinators were proposed from the roof and the surrounding environment. The evidences revealed that the height of the building affected the diversity of some bee species; increasing proportions of surrounding green space helped to increase abundance of bees and wasps; the colonies of bees were significantly affected by habitat connectivity, a frequent movement of bees and other mobile insects between roofs and ground guaranteed pollination of plants; plentiful plants combination was better than a single species in roof ecosystem services, and native forbs were beneficial for pollinations and foraging of pollinators; using fine substrate on green roofs may have a greater ecological value than common soil.
Effects of high pressure homogenization on the stability of cloudy apple juice
Authors: Zhu Danshi , Kou Chengcheng , Wei Liwei , Xi Pushun , Changxin LV , Cao Xuehui , Liu He 
Published: December 2019

Abstract
The high pressure homogenization (HPH) process is a non-thermal technology that can be used to change the structure of fluid foods. Appropriate HPH treatment is benefit for uniform particle sizes distribution in juice and reducing pulp sedimentation. Cloudy apple juice was used as the experimental material in this study to evaluate the homogeneous pressure and homogeneous times (10-1, 10-2, 20-1, 20-2, 30-1, 30-2, 40-1, 40-2, 50-1, 50-2) on stabilities of juice. The indicators, such as, cloud value, cloudy stability, particle size distribution, ζ-potential and dynamic instability were investigated for juice stability. The results showed that, when homogenization at 20 Mpa for one time, the apple juice showed lower cloud value, higher cloudy stability, more uniform particle sizes, higher ζ-potential and lower dynamic instability. Therefore, the better HPH condition on stability of cloudy apple juice was 20 Mpa homogenizing for one time.
Effects of pretreatment on the quality and stability of blueberry juice
Authors: Cao Xuehui , Zhao Yuting , Wang Zhenni , Zhu Danshi , Lv Changxin 
Published: December 2019

Abstract
Quality and stability in blueberry juice were studied with cold pretreatment and freeze-thaw pretreatment. Samples were pretreated in cold temperature environment and the cloud value of juice was significantly decreased (P<0.05). Meanwhile, the cloud value of juice was significantly increased when the blueberries were processed by freeze-thaw pretreatment (P<0.05). The juice of a*
and L*
value were significantly increased in freeze-thaw pretreatment and significantly decreased in cold pretreatment (P<0.05). The turbidity of the juice which blueberries were processed by cold pretreatment was 680 NTU that it was significantly decreased than other samples (P<0.05). The particle diameter of blueberry juice was decreased by cold pretreatment. A cold pretreatment blueberry to process juice most effectively retained the stability of juice and minimized color change.
Characteristics and release of road runoff pollution under artificial rainfall intensity
Authors: Ni Dong , Zhao Ming , Wang Chao , Shao Shegang 
Published: December 2019

Abstract
The artificial rain was used to carry out the leaching test on the road of S306. The sampling of surface runoff under different rain intensity conditions was carried out. The COD, TSS, petroleum and Ammonia nitrogen (NH3-N) were compared in the range of 16.3mm/h∼108mm/h. According to the data, the TSS of road runoff rainwater has a wide range of concentration (300-550mg/L). This is because the composition of pavement sediments determines the nature of road runoff pollution. The source of road runoff is complex and its pollutant composition is also complicated. However, the main pollution indicators causing runoff pollution are suspended solids (SS) and COD, and test data. The value shows that the lower value is mostly the monitoring value at the end of the rainfall. The reason is that the pollutants on the road surface have been taken away by the initial rainfall runoff in the late rain, so the concentration value is low.
Research on Application of Gradient Analysis to City Green Space Accessibility——Taking garden green space of Taian central city for instance
Authors: Ma Lin , Wang Hongtao , Liu Bing 
Published: December 2019

Abstract
Green space accessibility can be used to measure the potential of green space to provide services to residents. In this study, based on the spatial analysis function of GIS software and combining with the distribution of road network of Taian central city, gradient analysis was firstly introduced to analyse accessibility and its spatial distribution character of garden green space quantitatively. Results showed that whole accessibility of garden green space of Taian central city is good whichever transportation was adopted. Most of the regions could arrive at the nearest garden green space within 5 minutes. Accessibility of the centre area was better than that of the edge, and accessibility of the north area was better than that of the south. To some extent, there is relative between gradient distribution of accessibility and that of area of garden green space.
Research on the identification method of Chinese liquor brewing technology types
Authors: Liu Wenzheng , Li Hongxia , Zhao Mingyu , Zhang Junjie , Zhi Min 
Published: December 2019

Abstract
The brewing technology types of Chinese liquor include: solid method, liquid method and solid-liquid mixture method. Due to the difference of technology and raw materials, the price of three types of liquor is quite different. The outlaw often passes off the liquor brewed by the low-grade liquid brewing method as the liquor brewed by the solid brewing method. In this paper, according to the difference of amino acid content in liquor of different brewing technology types, two methods of preliminary identification of Chinese liquor methods were discussed. One method is the qualitative analysis for the colour reaction of amino acids with ninhydrin reagents, and the other method is the classification and quantitative analysis of amino acids in samples by GC. Seven kinds of liquor purchased from different channels are identified and the results of the two methods are consistent. The results of the experiment will give an instructive suggestion to guide the consumers to identify the adulteration of Chinese liquor.
Effects of different Solanum rootstocks on photosynthetic pigment contents and antioxidant enzyme activities of eggplant seedlings under cadmium stress
Authors: Pan Shaokun , Lu Ronghai , Li Hongyan , Lin Lijin , Tang Youwan 
Published: December 2019

Abstract
In the experiment, Solanum diphyllum, Solanum nigrum, Solanum nigrum humile and Solanum alatum as the rootstocks and eggplant seedlings as the scions, and the effects of different Solanum rootstocks on photosynthetic pigment contents and antioxidant enzyme activities of eggplant seedlings were studied. The results showed that S. nigrum as the rootstock increased the content of chlorophyll a, chlorophyll b and total chlorophyll of eggplant seedlings, and other treatments decreased the value of the above indicators or had no effects on them. All the Solanum rootstocks increased the content of carotenoid. Compared to ungrafted, the content of total chlorophyll and carotenoid of eggplant seedlings with S. nigrum as rootstock were the highest, which increased by 7.91% and 45.71%. Different Solanum rootstocks had different effects on the antioxidant enzyme activities of eggplant seedlings, but in general, Solanum rootstocks increased the antioxidant enzyme activities of eggplant seedlings. In conclusion, S. nigrum as the rootstock increased the antioxidant enzyme activities of eggplant seedlings while increasing its chlorophyll content, which was conducive to the growth of eggplant seedlings.
Co-catalyst MoS2-nanosheets/TiO2 nanotubes for the enhancement of photocatalytic hydrogen production
Authors: Ou Wei , Pan Jiaqi , Liu Yanyan , Wang Panhong , Chen Zhanfen , Li Chaorong 
Published: December 2019

Abstract
The MoS2 nanosheets/TiO2 nanotubes heterojunctions are designed for enhancing photocatalytic hydrogen production. The results of XRD, SEM and TEM imply that the heterojunctions are successfully prepared via electrostatic spinning technology and hydrothermal co-deposition method. Besides, the results of UV and PL display that the MoS2 nanosheets enhance the absorption of visible light, drive the transfer of photo-electro and promote the separation of photo-generated carries. Further, compared with the pure TiO2 nanotubes, the heterojunctions exhibit excellent photocatalytic hydrogen production enhancement of about ∼340.739μmol/g.h, which is about 7 times of pure TiO2 nanotubes.