bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study of key structure parameters on productivity of the ring-die biomass granulator
Authors: Ji Yunguang , Li Yun , Li Hongtao 
Published: April 2020

Abstract
The productivity of the biomass granulator is an important parameter to evaluate the quality of the equipment, where the structure of granulator is one of the important influencing factors. In this paper, the basic forming conditions of the granulator are analysed to determine the relationship between the material intake angle and the friction coefficient; Then, the height of the material pressed by the granulator and the influence of the structural parameters of the ring-die and the press roller are obtained; Finally, the empirical correlation between the productivity and the structural parameters of the ring-die biomass granulator is presented. The results show that: 1) the material intake angle β should be less than 26°; 2) When the height of biomass material is fixed, the diameter of the roller should increase with the diameter of ring-die.
Numerical simulation of sediment-laden flow on the Yarlung Zangbo River incorporating the climate change
Authors: Wang Jianyu 
Published: April 2020

Abstract
The Yarlung Zangbo River originates from the Qinghai-Tibet Plateau, and runoff consists of the rainfall, melting of snow and glaciers in the upper high-altitude areas. The flow and sediment transport induced by flow in the Yarlung Zangbo River is highly sensitive to changes in climatic conditions. Changes in flow and sediment transport will also have an impact on the downstream wetland ecosystem. In order to study the changes of flow and sediment transport in the Yarlung Zangbo River, Niyang River wetlands under the changes of climatic conditions is used as the considered case. The two-dimensional shallow water equation and the non-equilibrium bedload sediment transport model are proposed in the Yarlung Zangbo-Niyang River. The model is discretized using the unstructured grid finite volume method (FVM). The model includes approximately 355 km length and covers an area of approximately 673 km2. According to the measured time series of flow data at Nuxia hydrology station and the simulated data under the climate change conditions by the climate change model, the water level, flow velocity, erosion and siltation, and sediment gradation change in the river channel are calculated. The calculation results show that by the year 2025, the water level of Niyang River wetlands will increase by 2m under RCP8.5 (Representative Concentration Pathway), and accordingly the total area of the wetlands will decrease by 5%. The results show that climate change has a significant impact on the flow and sediment transport and downstream ecological environment of the Yarlung Zangbo River.
Study on the statistical characteristics of soil crack based on complex network
Authors: Wang Lili 
Published: April 2020

Abstract
In the References [1], we found the two typical soil-crack network (SCN) in Yuanmou Dry-hot Valley Region (YDVR) were not only the topological characteristics of the fracture network itself, but also more important study the reflected characteristics of the soil crack under different network topologies. On basis of the above research, we put our research on our attention and energy to their statistical characteristics. In this paper, according to complex network theory, we analyse the degree distribution properties of the two SCN in YDVR, that is, vertisols soil crack network (V-SCN) and dry-red soil crack network (DR-SCN), which includes not only their topological characteristics, but also more important study the reflected characteristics of the soil crack under different network topologies. In this paper, we have studied the betweenness centrality (BC) distribution and characteristic spectral density distribution of the two SCN. We found the power-law dielectric index of DR-SCN is bigger than V-SCN. The V-SCN is vulnerable overall damage, but the DR-SCN are more prone to dismemberment erosion. And we can observe how the crack development mechanism from “small” to “big”, and it can provide continuous visualization to study the growth process of soil crack.
Study on high wind hazard probability risk assessment methods of nuclear power plant
Authors: Wang Handing , Liang Xiaoyu , Zhang Xiaoming , Feng Bingchen 
Published: April 2020

Abstract
China’s nuclear power plants were built in coastal areas. High wind such as hurricane would make nuclear power plant transmission lines, structure and component to fail, leading to the transient or loss of off-site power accidents, which have an impact on the safety of nuclear power plants. This paper focuses on high wind hazards analysis of the operational nuclear power plants. We study the high wind probability safety assessment methods and the main technical elements. The following five tasks were performed to complete the high wind PSA models: Site Specific High wind hazard analysis, High wind Walk-downs and equipment list screen out, High wind Fragility Analysis, Integrate High wind Impacts into PSA Model, and Risk Quantification of High wind PSA Model. The methodology can be used to addresses high wind hazard probability risk analysis of nuclear power plant.
Research on distributed photovoltaic power prediction based on centralized photovoltaic output
Authors: Huang Xiaoxiao , Fan Ruiqing , Guo Xiangji , Chen Jian , Guo Lingxu , Yuan Zhongchen , Wang Kunyue , Zhang Jiaan 
Published: April 2020

Abstract
Distributed photovoltaic does not provide output data when it is connected to power grid due to cost constraints, which adversely affects power grid dispatching. Considering the solar irradiance correlation between output of centralized and distributed photovoltaic stations in a region, a method for predicting the output of distributed photovoltaic power generation is proposed. Sinusoid function is used to fit the output of unshielded photovoltaic system by using the least square method, and the unshielded coefficient is proposed to represent the variation of photovoltaic output. The output of distributed photovoltaic (DPV) can be predicted by combining the unshielded coefficient and the reference power curve. The method is verified by a provincial power grid in northern China, the results show that the method has high accuracy, especially for small fluctuations.
Industrial integrated energy system optimization with considering thermal power transferring process
Authors: Yuan Weideng , Duan Mengyong , Chen Weihong , Qiu Zejian , Dong Wenjie , Yang Benzhi 
Published: April 2020

Abstract
In the regional integrated energy system, multiple resources on the demand side and supply side should be considered in integrated planning. In particular, how to realize measuring heat energy grade as well as considering thermal energy transferring medium characteristics in the integrated energy system optimization operation and resource allocation is a urgent research area to explore. In this paper, a typical industrial park integrated energy system considering thermal energy transferring process is established. In the beginning, multi-energy flows complementary characteristics of the industrial park have been introduced, which could improve energy usage efficiency by energy conversion, energy storage and energy substitution. Then the models of storage battery, micro-turbine and other resources have been established. In addition, the model of heat energy pipe network has been built considering thermal energy unidirectional transmission and various heat grade. Based on the previous models, the objective function of industrial park economic operation. Finally, the simulation results show that the proposed multi-energy flows model could satisfy the economical operation as well as energy supply balance while obeying energy conservation law and transferring process limit.
A way to improve the performance of the integrated maintenance system in new generation dispatching control system
Authors: Xu Pan , Sun Mingyang , Zhuang Weijin , Zhang Hong , Pan Jiajia 
Published: April 2020

Abstract
As the structural complexity and application relevance of the new generation dispatching control system are increased due to the architecture changes, this paper analyses the actual requirements of integrated maintenance system of the control system and the performance problems in the data collection and analysis processes, introduces the application scenario of distributed memory technology in the integrated maintenance system of the new generation dispatching control system, presents an integrated solution to meet the maintenance performance requirements of the new generation dispatching control system.
Study on eutrophication characteristics of rainy and dry season in Shenzhen Bay
Authors: Huang Xu , Luo Huan , Wu Qiong , Li Zhaoxu , Chen Xiuhong , Hei Liang 
Published: April 2020

Abstract
Firstly, the eutrophication of five monitoring points in Shenzhen Bay was analyzed by using the nutritional status quality index method, and the eutrophication of the entire Shenzhen Bay was analyzed by the results of the eutrophication model simulation. The results showed that the maximum of the nutritional status quality index(NQI) in the dry season was 22, the minimum was 3;the maximum NQI in the rainy season was 23, the minimum was 4, and when NQI is greater than 3, the water is eutrophication level, so whether it was the dry season or the rainy season, Shenzhen Bay is basically eutrophic, and the eutrophication of the Shenzhen Bay in the rainy season is more serious than that in the dry season. Regardless of the dry season or the rainy season, the NQI of the Shenzhen Bay outer area is basically around 5, while the NQI of the interior area is basically larger than that of the outer area. The degree of eutrophication is more serious than that of the outer area;the maximum NQI is 22 in the high tide during the dry season, and the maximum NQI is 23 in the rainy season;the maximum NQI is 21 in the ebb during the dry season, and the maximum NQI in the rainy season is 22, so the eutrophication of Shenzhen Bay is more serious than the ebb when the high tide.
The impact of access to clean water on health of the elderly: Evidence from China
Authors: Liu Chenxi 
Published: April 2020

Abstract
Access to clean water is a crucial part for the health of humans. Many present and previous studies have found that drinking water quality affects people’s health. Our study aims to find the association between drinking water and health of the elderly in China. Through regression analysis, the results show significant association between water facility (access to tap water) and old people’s depression level, difficulties to do daily activities and self-assessed health. The harmful chemicals in unsanitary water bring health risks to the old people. We suggest the government that investing more money on drinking water facilities is necessary to improve both physical and mental health of the elderly.
A study on the characteristics of Ozone Weekend Effect and reaction sensitivity in Chengdu
Authors: Liu Hefan , Deng Ye , Huang Fengxia , Zhang Tianyue , Yang Xinyue , Zhang Xin , Song Danlin , Chen Yan 
Published: April 2020

Abstract
This study improved the computation theory “Ozone Weekend Effect Method” (OWEM) and analyzed the 2016 observation data from the state-controlled ambient air quality monitoring sites in Chengdu using the OWEM theory. The improved OWEM theory is then applied to processing large sample data and making a judgment on photochemical reaction sensitivity in Chengdu. The result of applying the OWEM theory to Chengdu shows 1) that the VOCs-limited period, the NOx-limited period and the photochemical reaction steady-state period, Rt, accounted for 66.06%, 33.64% and 0.30%, respectively; 2) that on a seasonal basis, i.e. in the ozone photochemical reaction occurring in spring, summer, autumn and winter 2016 in Chengdu, the VOCs-limited period accounted for 59.40%, 72.49%, 63.85% and 68.49% of the 2016 observed data, respectively, and the NOx-limited period accounted for 39.70%, 27.51%, 36.15% and 31.19%respectively; 3) that in the VOCs-limited period and the NOx-limited period of August 2016, the month when the most serious ozone pollution of that year occurred in Chengdu, Rt accounted for 70.0% and 30.0%, respectively, and that there was no photochemical reaction steady-state zone period that month; 4) and that through estimation, it is suggested that as for the ozone pollution control of Chengdu, the ratio of VOCs emission reduction to NOx emission reduction should be around 3:1.
Present situation of hazardous waste generation in China and grey model prediction
Authors: Yan Jinchuan , Liu Yi , Li Zhi 
Published: April 2020

Abstract
According to the 2008-2017 China Environmental Statistics Yearbook data, combined with GIS heat map, the current situation and regional distribution characteristics of hazardous waste generation and disposal in China were analyzed, and the GM gray model was constructed to predict its output in the next five years. The results show that it is predicted that by the end of 2023, hazardous waste production of China will reach 157,889,300 tons. It is suggested that take the government as the guidance, the production and disposal enterprises will jointly promote the development of hazardous waste resources, improve the existing treatment methods and strengthen the hazardous waste management system, thus breaking the deadlock of geographical mismatch.
Adsorption of ampicillin sodium on activated carbons with different surface chemistries
Authors: Li Xin , Zhang Nannan , Yang Liyan 
Published: April 2020

Abstract

BACKGROUND: The adsorption of ampicillin from aqueous solution by three types of activated carbon was investigated. The first was a commercial activated carbon (AC), the second (AAC) was AC modified by HNO3 oxidation and the third (HAAC) was AAC modified through thermal treatment. The surface properties of the activated carbon samples were characterized and the effects of pH and contact time on the adsorption were determined. The adsorption isotherms, adsorption kinetics and adsorption mechanism are discussed. RESULTS: Compared to AC, HNO3 oxidation increased the number of acid functional groups on the surface of AAC, which hindered the adsorption of ampicillin. For HAAC, thermal treatment removed surface oxygen groups and then improved the adsorption ability. The adsorption processes was greatly affected by pH and acidic conditions were favorable for adsorption. With an initial ampicillin sodium concentration of 200 mg/L, 9 h was needed for adsorption to reach equilibrium. The Langmuir isotherm provides a better fit for the adsorption than the Freundlich isotherm and the maximum adsorption capacities for AC, AAC and HAAC were 90.6, 59.8, 140.9 mg/g, respectively. The sorption kinetics can be described by a pseudo-second order model. CONCLUSION: The functional groups on activated carbon greatly affect its adsorption ability. The adsorption of ampicillin can be improved by increasing the number of basic functional groups on the activated carbon. Chemisorption was the dominant adsorption process and pH was an important factor affecting ampicillin adsorption.
Evaluation of the old residential area modification by applying improved fuzzy comprehensive evaluation
Authors: Li Xiufang , Huang Mingqiang 
Published: April 2020

Abstract
In order to make a global assessment on the modification effect of existing old residential areas in hot summer and warmer winter zone, an improved fuzzy comprehensive evaluation (FCE) model of old residential building modification is established based on the aspects of structural safety and architectural appearance, indoor comfort system, outdoor environment, public service facilities, building equipment efficiency and operation management, etc. Analytic hierarchy process is used to determine the weights of evaluation factors at all levels. And the model is used to evaluate the modification effect of the old residential buildings in Xiamen city. The evaluation result shows feasibility of this modification method on the old residential building. The evaluation grade of this area’s modification can be assessed as “Good”, which can provide a reference for the modification of the old residential areas with hot summer and warm winter. Measures, such as increasing government financial input, institutionalized ways to tracking energy consumption, popularization of energy-saving awareness, should be taken for the modification.
Problems and corrective measures of promoting the green construction of high-quality settlement buildings
Authors: Huang Mingqiang , Lin Ruijuan , Wang Weiwei , Song Zixin , Xia Xumei 
Published: April 2020

Abstract
The green construction of high-quality settlement buildings is related to the people’s life, the integrity of the government and social stability. Accelerating the construction of high-quality settlement buildings is helpful to promote the harmonious development of society. This study first expounds the significance of promoting the green construction of high-quality settlement buildings, then analyzes three major problems in the construction process of settlement buildings based on the data of previous research, and on this basis puts forward corresponding countermeasures and suggestions to promote the sustainable development of high-quality settlement buildings construction.
Growth period trend analysis both Triticum aestivum L. and Zea mays L. in Eastern Henan Province: Case study of NDVI3g (1982-2013) in Yongcheng and Xiayi experiment areas
Authors: Cui Zhenzhen , Ma Chao , Huang Shanshan 
Published: April 2020

Abstract
Long-term GIMMS AVHRR NDVI3g (1982∼2013) remote sensing image was used to obtain the equivalent biomass of winter wheat and summer maize in Xiayi and Yongcheng experimental sites as well as the change trend of vegetation SOS, EOS and LOS by regression analysis, Gaussian fitting and NDVI volume integration, and combined with climate driving factors (precipitation, temperature) to analyze the correlation between these trends and vegetation index changes. The results showed that (1) The vegetation index of 32a in the study areas showed an increasing trend, the vegetation growth of Yongcheng was better than that of Xiayi, and the NDVI equivalent biomass was higher than that of Xiayi; (2) The SOS of the Yongxia experimental sites was significantly advanced, and the EOS was slightly advanced, resulting in a significant increase in the vegetation growth period in the two study areas, and the increase of vegetation LOS in Yongcheng experimental area was about 3 times that of summer maize. The advancement of LOS was the main way to respond to climate change by vegetation activities in Yongxia areas; (3) The NDVI in the study areas was significantly positively correlated with temperature and had no significant correlation with precipitation.
The Development of Solar-Powered Gas Metering Units Equipped with Radio or 3G Based Telemetry Systems
Authors: Velichko M A , Gladkikh Yu P , Kostina I B 
Published: April 2020

Abstract
In this article we have described the development of solar-powered gas metering units including modern ultrasonic and vortex flowmeters for volume and mass measurement of natural gas, associated petroleum gases, inert gases, oxygen, hydrogen, air, nitrogen, carbon dioxide and any other single and multicomponent gases that are not aggressive to the flowmeter materials. We have shown implementation of such units in the existing gas producing stations in the desert of Kara-Kum. Confirmed was the ability of our gas metering units to operate more than a year without network power supply and staff intervention. Also pictured was creation of telemetry system for collecting and transmitting metrological information, including gas flow rate, temperature, pressure, humidity to the central terminal. Different physical layers have been used to transfer data from the metering units, including radio channels at 433 MHz frequency between units and central station. This telemetry system implemented selfmaintenance and self-monitoring features, facilitating remote control of metering unit, so important in rigid conditions of solar-rich deserts and semi-deserts.
Microstructures and mechanical properties of Ni/Fe dissimilar butt joint welded using the cold metal transfer
Authors: Tang YunLong , Ye Xin , Ding LongCan , Zhang PeiLei , Yu ZhiShui , Wu Di 
Published: April 2020

Abstract
In this study, dissimilar butt joints were formed between as-rolled Inconel 718 and SUS 316 using cold metal transfer (CMT) with ERNiFeCr-2 filler metal at a welding speed of 5 mm s−1 and three different welding currents (130, 160 and 190 A). The morphology, microstructure, and mechanical properties of the joints and the mechanism by which the joint interface formed were studied. The results indicate that CMT welding parameters have an effect on the weld appearance and that the weld metal exhibits better wettability and spreadability at a welding current of 160 A. The interface between the weld metal and SUS 316 base metal was characterized by applying an optical microscopy (OM) and scanning electron microscopy (SEM) equipped with energy-dispersive X-ray spectrometry (EDS). The results revealed that no obvious diffusion of Ni and Fe ions was identified across the joint interface. The fractures that initiated in the joints during the tension testing formed in the heat-affected zone (HAZ) of the SUS 316 base metal, and the high-temperature tensile strength of the joint was observed to be 424 MPa, which is approximately 87.06% of that of SUS 316 base metal (487 MPa) and 67.19% of that of Inconel 718 base metal (631 MPa). In terms of the elongation, the joint (21.9%), Inconel 718 base metal (21.2%) and SUS 316 base metal (22.3%) elongations were similar. For comparison, the joint also was tested at room temperature, resulting in a tensile strength and elongation of 511 MPa and 27.5%, respectively. A spherical elemental Ni segregation morphology was clearly observed at the high-temperature fracture. Hardness studies demonstrated that the weld metal hardness is higher than that of the SUS 316 base metal.
Functionalization of silk fabric using hyperbranched polymer coated attapulgite nanoparticles for prospective UV-resistance and antibacterial applications
Authors: Liu Yan , Gao Xiaoliang , Zhang Guangyu , Xiao Yao 
Published: April 2020

Abstract
Herein, the Attapulgite nanoparticles (ATP NPs) coated silk fabric was prepared by impregnation method using hyperbranched polymer as addition agent. The ATP NPs and prepared silk fabrics were characterized by means of scanning electron microscope (SEM), ultraviolet-visible (UV–Vis) spectroscopy, Fourier transform infrared spectrophotometer (FTIR), X-ray diffraction (XRD), Energy Dispersive Spectrometer (EDS). The results of SEM, EDS, FTIR and XRD confirmed that ATP NPs were successfully coated on the surface of silk fabric. Not only did the treated silk fabrics possess excellent antibacterial property and antibacterial resistance, but also exhibited outstanding anti-ultraviolet performance, which can meet the requirements of multifunctional products.