bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Biological Basis of the Cultivation of Medical Senior Innovative Talents
Authors: Wang Xiaoyan , Li Siqi , Deng Kai , Wang Jianguo 
Published: June 2019

Abstract
Every new discovery in the history of biology, such as the essence of life, the origin of life, the discovery of cells, the establishment of cytology, the cell biology at the molecular level, etc., the biologist has left brilliant track in the journey of scientific innovation. The home climbs the glorious footprint of the Science Foothills. Nowadays, to cultivate cross-century competitive high-quality talents, we must advocate the spirit of not afraid of difficulties, fore ahead, and be brave to explore; we must conscientiously study and master the basic concepts, theories and methods of biology, with history and philosophy. Trace back to these concepts, theories and methods. In this way, we will improve our ability of innovation, continue to have new and more discoveries in science.
On the Innovative Operation of Exhibition of the Taobao E-commerce Run by Internet Celebrity
Authors: Zhang Jiankang , Zhao Yu 
Published: June 2019

Abstract
The exhibition of the electronic commerce run by Internet celebrity is a major driving force for China’s new economy.Innovative operation is an important cornerstone of the vigorous development.The innovative operation of exhibition of the Taobao electronic commerce run by Internet celebrity includes Seller Show— clothes hall,cosmetics hall,hello player—peripherals hall,the most delicious expression—foods hall,Time Warp—the development History from 1.0 times to 4.0 times.The micro-challenges of the innovative operation of exhibition are to attack fake products and establish a brand image for the exhibition,eliminate internet celebrity depraved image and establish a positive and healthy social image and avoid monopoly of large-scale electronic commerce and encourage diversified electronic commerce platform to join the exhibition.The macro-challenges of the innovative operation of exhibition of the Taobao electronic commerce run by Internet celebrity are no precedent providing experience for it,the exhibition industry management system and industrialization process being backward and lack of professional talents.The innovative operation of exhibition of the Taobao electronic commerce run by Internet celebrity needs to encourage the development of diversified Internet celebrity companies,improve third-party logistics warehousing management,and cultivate professional exhibition talents.
Effect of straw carbonization on properties of cement-based straw fiber composites
Authors: Xiao Li-guang , Liu Xi-xu 
Published: June 2019

Abstract
The raw materials of straw fibers were treated by different methods of nitrogen filling and carbonization at different temperatures. The cementitious materials consisted of ordinary Portland cement with strength grade 52.5 and sulphoaluminate cement with a ratio of 3:7. The surface morphology and material analysis of the fibers were carried out by means of SEM and EDS. The SiO2 content in the surface layer of carbonized straw fibers was 86.69% higher than that of common straw fibers, and the interfacial bonding of the composites was more compact because of the hydration reaction. The initial setting time of composites with carbonized straw fibers is shorter than that of ordinary straw fibers, the flexural strength is slightly reduced by 6.3%, and the compressive strength is significantly increased by 21.93%.
Effect of Alkali Treatment of Straw Fiber on Mechanical Properties of Alkali Slag Cement Composites
Authors: Xiao Li-guang , Liu Xi-xu , Jing-yao LI 
Published: June 2019

Abstract
In this paper, NaOH solution was used to treat straw fiber modified alkali slag cement, which enhanced the interfacial bonding between straw fiber and cementitious materials. The results showed that the best modification effect of straw fibers was obtained by soaking 3% NaOH solution for 16 hours. The compressive strength and flexural strength of alkali slag cement specimens cured for 28 days are 81.5 MPa and 10.9 MPa respectively. The toughness of the composites increases with the increase of fiber content. The flexural strength of straw fiber composites treated with NaOH solution and without NaOH solution increased by 5.6% and 11.3% compared with those without NaOH solution, and the compressive strength of straw fiber composites treated with NaOH solution increased by 34.08% compared with those without NaOH solution when the content of straw fiber was 10%.
Comparative Study of the Impact of Biomass and Clean Fuels Burning as Cooking Energy on Rural Indoor Air Quality in Heilongjiang, China
Authors: Zhang Yue , Zhang Yu , Wang Zhicheng 
Published: June 2019

Abstract
In rural areas of the northeast China, the majority of residents use traditional Chinese Kang-stoves for heating and cooking by burning biomass fuels. However, this method is associated with serious indoor air pollution problems. The purpose of this study is to evaluate indoor air quality impacts from biomass combustion and indoor air quality improvements derived from using clean fuel. A comparative study was conducted in three rural households of Heilongjiang to determine indoor air pollution extent during burning biomass (rice straw, cornstalk and corncob) and liquefied petroleum gas (LPG) fuels for cooking. The results indicated that the concentration of CO from the combustion of four kinds of fuels was almost below the guidelines prescribed in Chinese In-door Air Quality Standard. On the contrary, PM2.5 concentrations exceeded the limiting value regardless of which fuel was used, and the lowest PM2.5 concentration values, which were obtained during burning LPG, were about 2.4-7.5 times of 24-h mean PM2.5 concentration limit. The mean values of formaldehyde concentrations during using four types of cooking energy were totally higher than the standard limit, and the lowest formaldehyde concentrations were detected when corncob was used as cooking energy. Compared with LPG fuel, biomass fuels combustion in traditional Kang-stove with chimney increased the concentrations of TVOC and BTEX. To conclude, the pollutants generated from using LPG are relatively less harmful. Among the three biomass fuels, the minimal pollution derives from the combustion of corncob.
Optimization of adsorptive desulfurization process conditions for FCC gasoline
Authors: Nan-ni Xiong , Zheng Li , Peng Wang 
Published: June 2019

Abstract
In order to study the desulfurization of FCC gasoline, Zn/NaY zeolite FCC gasoline adsorbent was synthesized by impregnation method. The effects of space velocity, adsorbent bed temperature, adsorbent roasting temperature and roasting time on the desulfurization rate of FCC gasoline were investigated by adsorbent and fixed bed process. The results showed that the desulfurization rate of FCC gasoline reached about 85% under the conditions of 0.5 h-1 air velocity, 35°C adsorbent bed temperature, 700°C adsorbent roasting temperature and 4 h roasting time. Adsorption desulfurization as a technology with many advantages, such as low investment, low operation cost, complete desulfurization, had good application prospects and popularization value. To develop a fixed bed adsorption desulfurization technology for FCC gasoline which meets the requirements of V gasoline quality standards of producing countries.
Synthesis and Properties of Branched Polymer Based on Modified Chitosan for Enhanced Oil Recovery
Authors: Liu Yanqin , Lai Nanjun 
Published: June 2019

Abstract
In this study, chitosan and polyamide-amine(PAMAM) were utilized to prepare a branched polymer based on modified chitosan (HPDCS) for enhanced oil recovery(EOR). The structure of the product was confirmed by FT-IR, 1HNMR and SEM. Compared with hydrolyzed polyacrylamide (HPAM), HPDCS exhibited better thickening properties and shear resistance due to its special branched structure and the flexible molecular chains can be deformed through the pore throat of the porous medium, which can avoid serious damage to the molecular chains. After a 45-hour reaction period with biological enzyme, the apparent viscosity of the HPDCS solution decreased significantly, and the viscosity retention rate was only 67.7%, indicating that the introduction of chitosan in the polymer could improve the biodegradability of polymers to a certain extent. Based on sandpacked tube displacement experiments, the HPDCS could build high resistance factor and residual resistance factor in the corresponding porous medium which indicated that the HPDCS performed excellent mobility control ability. Besides, compared with HPAM, the HPDCS solution of 2000 mg/L showed better oil recovery of 24.12% in the corresponding porous medium, which demonstrated that the branched polymer has a more outstanding EOR ability.
The analysis of collision risk effect among different aircraft combinations by parallel runways spacing
Authors: Pang K , Cai L C , Qiao Y , Chen D F 
Published: June 2019

Abstract
International Civil Aviation Organization (ICAO) has stipulated the spacing of parallel runways, but it hasn’t considered different aircraft categories classified by speed. So there is no provision as a reference for the safety runway spacing corresponding to different aircraft speed combinations. This paper studied the safety spacing of parallel runways based on aircraft categories classified by speed in the ICAO regulations with the aim of providing more reasonable planning for the parallel runway configuration suited for different aircraft speed combinations. The improved simulation model is established. The innovations are mainly reflected in the following two aspects. First, based on the established evasion solution to the hazardous scenario in PLB(Parallel Landing Blunder) model, this paper added a new solution that the deviating aircraft (blunderer) corrects its course returning to the designated approach course (i.e., the course correction solution). Second, when adopting the evasion solution, this paper revised the simulated evasion maneuver command according to Doc. 8168 of ICAO, because it could better reflect the pilot’s real response. According to the simulation results, it is concluded that when the combinations consists of the same aircraft category, both A-A and B-B combinations can conduct simultaneous independent parallel instrument approaches (SIPIA) to the parallel runways with the spacing of 835m. When the combinations consist of different aircraft categories, the paper emphatically studied the A-E combinations with the largest difference of approach speed. In the case of A-E combinations, with 1035 m runway spacing, the collision risk of SIPIA is relatively high.
Improvement of the UV-induced Reduction Efficiency of Nitrate by Manganese (II) chloride based on Sequential Injection Analysis
Authors: Zhang Y M , Shi Q , Sun Z L , Wang Y , Zou Y , Wang Q , Liu Y 
Published: June 2019

Abstract
The traditional method of reducing nitrate by ultraviolet radiation was improved in this study. Manganous (II) Chloride (MnCl2) was added on the basis of original reagent to improve the efficiency of nitrate reduction by Ultraviolet radiation (UV), and the optimum reaction conditions of improved UV reduction method were discussed. It was found that the best UV-reduced reduction efficiency of nitrate obtained at the concentration of 1.0 g/L photoreduction DTPA, the concentration of Tris was 1.0 g/L with 8.0 of pH in the presence of 0.8g/L MnCl2 with 2 min UV radiation. The reduction efficiency increased by about 25.00% compared with the traditional analysis method, reached to 88.24%. The linear relationship of the established method was good at the range of 0-500μg/L, and the detection limit was 2.17μg/L. The average concentration of nitrate in the coastal seawater was 8.89μg/L and the relative standard deviation was 0.23%. We added the standard solution of NO3-N with the concentrations of 100μg/L and 300μg/L to the seawater samples, respectively, with the recovery of standard addition among 99.90%~100.34%. The established method improved the UV reduction efficiency of nitrate and got high reproducibility and good accuracy which can be used to monitor nitrate content by in-situ analyzer.
Suitability evaluation of rural tourism based on AHP and fuzzy evaluation method
Authors: Xing Yunheng , Li Sheng , Liao Jianjun , Wang Zhiyuan , Wu Bo 
Published: June 2019

Abstract
In order to study the suitability of rural tourism development and prevent the blind development of rural tourism, we have identified 12 evaluation indicators of natural resources and human resources from three aspects: tourism resources, current development intensity and village development potential. Using AHP and fuzzy evaluation method to quantitatively analyze the various elements of rural tourism development, and evaluate the suitability of village development tourism industry.
Study on dynamic stress-strain response law of frozen saline soil
Authors: Zhao Futang , Chang Lijun , Zhang Wuyu , Kou Guangyun , Liu Haoyang 
Published: June 2019

Abstract
The subgrade saline soil in a certain area of western Qinghai province was studied, based on the British GDS dynamic triaxial test system, the dynamic triaxial test under laboratory test was carried out to study variation dynamic stress-strain and dynamic shear modulus under the different temperature, frequency and confining pressure. The test results show that the dynamic stress-strain relationship is significantly affected by temperature change under cyclic dynamic load, followed by frequency and confining pressure. Under the same strain amplitude, the lower the temperature, the larger the dynamic shear modulus. When frequency and confining pressure increase, dynamic shear modulus also increases. Whereas, the influence of confining pressure on the dynamic shear modulus is more obvious, and the backbone curve development trend is steeper. Both maximum dynamic shear modulus and final shear stress amplitude increase with the frequency increases when temperature and confining pressure remain unchanged. Meantime, the maximum dynamic shear modulus curve is a convex shape, and the final shear stress amplitude curve is a convex shape at positive temperature,while which a concave shape at negative temperature. At constant frequency and confining pressure, the maximum dynamic shear modulus and final shear stress amplitude increase with the decrease of temperature. Curves of change trend are slower above 0°C, and steeper below 0°C.
Modeling and Simulation of Evacuation Based on Bat Algorithm
Authors: Yu Tongtong , Wang Jian , Chen Xiaowei 
Published: June 2019

Abstract
The safe and orderly evacuation of crowds is a hot topic at home and abroad. To solve the problem of low evacuation efficiency of evacuation model based on PSO, this paper constructed a crowd evacuation model based on Bat Algorithm (BA). This model selected the new swarm intelligence algorithm Bat Algorithm and comprehensively considered obstacle avoidance. Specifically, firstly, the principle of BA and its feasibility for evacuation was introduced. Then, BA was used to update the crowd movement, the obstacle avoidance mechanism was established by using the cost function, and the crowd evacuation model based on BA was constructed. Finally, the evacuation path, evacuation efficiency and degree of chaos of this model and PSO-based evacuation model were compared and analyzed. The degree of chaos is represented by the value of evacuation entropy. Simulation results show that this model can effectively improve the evacuation efficiency and reduce the degree of chaos in the evacuation process.
Numerical Simulation of Fracture Propagation in Low Permeability Reservoir
Authors: ZOU Zuxu , Liu Jianjun , PEI Guihong , Chen Jiwen 
Published: June 2019

Abstract
In order to reveal fracture propagation law of low permeability oil reservoir, using RFPA software, a series of simulation models were built. Through numerical simulation, the maximum shear stress, the minimum main stress and pore pressure changes under different water injection pressure were got. The results shown that the process of fracture extension can be divided into three stages: the front stage, the microcrack stage and the rupture stage, the water injection pressure at 25 ~ 30MPa is the best result. The founding provides important theoretical guidance for low permeability reservoir reconstruction and optimization of well layout in the process of waterflood development.
Beijing and New York City: A comparison of building energy efficiency policies
Authors: Zhang Li , Wang Yonghui 
Published: June 2019

Abstract
Building energy efficiency is an important measure for reducing carbon emissions, and it plays a key role in the energy saving strategies all over the world. There is a growing global appeal to improve building energy efficiency due to the pursuit of sustainable development. Reducing building energy consumption and improving building energy efficiency are the main tasks of energy conservation work in China and the United States. We chose Beijing and New York City to highlight the current building energy efficiency policies in two cities. We then examine the differences between them. In New York City, there are more financial incentives, funding channels, participants, and public data available than in Beijing. Using the lesson learned from our investigation of New York City, we make recommendations for the development of Beijing’s policies. To overcome barriers to creating energy-efficient buildings, Beijing should increase energy efficiency awareness, innovate with flexible and feasible incentive policies, and improve data disclosure policies.
Effects of carbon dioxide dilution and composition on tip opening and OH radical distribution in laminar non-premixed Bunsen flame
Authors: Wang Zhonghua , Tang Qiang , Yang Zhongqing , Li Keliang 
Published: June 2019

Abstract
Effects of CO2 dilution and composition on tip opening and flame OH radical distribution in laminar non-premixed Bunsen flame were investigated by using planar laser induced fluorescence (PLIF) technique. Experiments were conducted at different component fractions diluted with CO2 at 20%, 25%, and 30%. The syngas were produced by biomass catalytic gasifying. Stretch rates were calculated and combined with OH-PLIF images and simulation. We conducted kinetic simulation to analyze the production of OH radical. Results show that as VH2 increases and hydrogen slightly increases, the effect of mass diffusion is enhanced, in addition, the value of stretch rate decreases, and the tip opening becomes further obvious. The profile of OH radical distribution also becomes broad. Finally, the total production rates of OH radicals increases with a rate less than 7.5%. Hence, the maximum value of OH radical counts is reduced by 33.33%, 27.92%, and 23.09%. Nonetheless, with the increasing addition of CO2, the effect of mass diffusion is weakened; besides, chemical reaction residence time increases, and the value of stretch rate increases; the tip opening is less obvious. Although the distribution area of OH was narrowed, its production decreased and the relative concentration of all OH radical decreased.
Research on standards and regulations of the operation of wastewater treatment plants
Authors: Xiaoxin Zhang , Jin Huang , Ling Lin , Shuming Liu , Yueping Wang , Xinheng Zhang 
Published: June 2019

Abstract
This paper summarizes the regulations related to operation of wastewater treatment plant at home and abroad, analyses the system, quantity and type distribution of the standards related to operation of wastewater treatment plant (WWTP) at home and abroad, and provides theoretical basis for research and development of operation effect evaluation criteria for Chinese WWTP by studying the contents and demands of standards related to operation effect evaluation of WWTP at home and abroad.
Influence of Product Modularity on Performance of Old Buildings’ Promotion and Transformation Projects
Authors: Cao Yayun , He Weiyi 
Published: June 2019

Abstract
Old buildings’ function promotion and transformation in cities is a new way to effectively improve people’s livelihood and vigorously stimulate domestic demand. However, government, as the sponsor of old buildings’ promotion and transformation projects, experiences a policy dilemma that exactly how to respond to the masses’ individual demands rapidly while taking the efficiency of supply into account. This article focuses on that if the modularity theory, which is applicable to private sector, can solve dis-economies of scale caused by customized supply in public sector. Through a case study in Tianjin, we find functional module partition mode and structural module partition mode, the main considerations of modular design, can make an influence on decision flexibility, whose intention is function configuration; and then, decision flexibility influence project performance by allocating optional space and speed.
Elastoplastic analysis of anchored tunnel under seepage
Authors: Gu Shuancheng , Li Xiaodong , Hu Xiaokai , Wang Bin , Wang Yaping 
Published: June 2019

Abstract
In order to study the stress and displacement distribution of surrounding rock of full-length bonded anchor support tunnel under seepage. The surrounding rock is regarded as a uniform and continuous porous medium. The supporting reaction force and seepage force of the surrounding rock are converted into the axisymmetric radial volume force of the circular tunnel and act on the stress field. Considering the reinforcement of the surrounding rock parameters by the bolt, the mechanical model is established. The elastoplastic analysis method is used to derive the analytical solution of the stress and displacement elasticity of the surrounding rock and plastic analytical solution based on Mohr-Coulomb yield criterion, which can be used to obtain the expression of the radius of the plastic zone of the tunnel and the displacement of the wall. Finally, the calculation results of this paper are compared with the numerical simulation analysis. The results show that the influence of the seepage on the plastic zone range and the wall displacement is more serious. The length and pretension of the bolt are inversely related to the plastic zone range and the displacement of the wall. The bolt row spacing is positively correlated with the plastic zone range and the displacement of the wall. Under the same conditions, considering the seepage requires the anchor to provide greater support. In order to avoid the instability of tunnel caused by seepage, the length of the bolt can be reasonably increased, the bolt spacing can be reduced, and the bolt pretension can be increased.
Study on Qualitative Evaluation Index System of VFM in PPP Project
Authors: Sun Chunling , Li Nannan , Zhang Yupeng 
Published: June 2019

Abstract
With the vigorous development of PPP mode in China, the qualitative evaluation of value for money (VFM) has become an important support for the decision-making of PPP project. As the evaluation system of VFM is still not mature enough in China, it needs to be further improved. On the basis of the "Guide to VFM evaluation in PPP Project (trial)", to get further supplement and enrich the indicators of qualitative evaluation of PPP projects, and giving the specific judgment criterion, the expert investigation method and hierarchical analysis method are used to determine the weight of evaluation indexes, and then a qualitative evaluation model of VFM evaluation with strong operability and reasonable evaluation would be constructed. Finally, the model which is constructed in this paper would be tested by engineering projects so as to make the qualitative evaluation method scientific and feasible for PPP model.