bluuebunny/crossref_metadata_2025_split huggingface dataset:
Simulation of Climbing Process of Aircraft on Plateau Airport
Authors: CHEN D F , ZHU Z Q , CAI L C , PANG K , XUE J 
Published: June 2019

Abstract
In order to solve the problem of the minimum climbing gradient of plateau airport and the problem of limiting slope at ends of clearance obstacles, we establish a model for calculating the performance of aircraft climbing and analyse the performance of climbing during the flight of the aircraft in the course of taking off. Through the simulation calculation, the variation law of the flight route height at different air pressure heights is analysed for the aircraft’s full and one engine failure, and the relationship between the flight path gradient and the air pressure height when the aircraft is in full engine and one engine failure condition is established.
Prediction of penetration depth of earth penetrator based on neural network
Authors: Zhuo Chen , Huixiang Sun , Yingwu Wang , Huan Niu 
Published: June 2019

Abstract
An artificial intelligence neural network model is established in this essay to seek a more general method for predicting penetration depth of earth penetrator, to comprehensively analyze the effect of various parameters on penetration depth as well as to predict the penetration depth of earth penetrator.This paper, by means of numerical simulation, and determined the ordnance penetrator warhead curvature radius, the length of the projectile, the density of the projectile,the density of the target protective layer, the elastic modulus of the target protective layer and the hit velocity of the earth penetrator.This six key parameters as the input data of neural network model, and by using numerical simulation to obtain the data needed for training the neural network model samples. According to the characteristics of six input data and one output data of the neural network model, the possible structure of the neural network model is set, and the optimal model structure is selected through training. We built neural network model to forecast the ordnance penetrator penetration depth, analyzes the six key parameter’s influence on the depth of penetration, the results show that reducing the warhead curvature radius, increasing the length and density of the projectile, properly increasing the impact velocity of the projectile can improve the penetration ability of the earth penetrating projectile, and increasing the density and elastic modulus of the target protective layer can improve the anti-penetration ability of the protective layer.
Numerical Study on Transport of High Concentration Suspended Sediment Water in Artificial Seawater Lake
Authors: Huamin ZHOU , Shichang HUANG , Xin ZHAO , Yongqiang NI , Dan XU 
Published: June 2019

Abstract
The sea water near the estuary of Yangtze River is high in sediment concentration and low in transparency. Clear coastal water can be found in artificial sea lakes, which are isolated from outer sea water by reclamation projects in the intertidal zone. But the water supplied by sea for the artificial lake exchanging is still a big problem. Transport of high concentration suspended sediment (SS) water in artificial seawater lake is studied. The water supplied from the small lake (sand basin) cannot meet the requirements of the landscape and recreation needs of the big lake, as the SS concentration is 0.2 kg/m3. After adding the ecological barrier in sand basin, the SS concentration of most water area in big lake is below 0.1 kg/m3. This idea can be used as reference for water quality control of seawater artificial lake.
Study of aramid and carbon fibers on the tensile properties of early strength cement mortar
Authors: Nie Liangxue , Xu Jinyu , Luo Xin , Chen Haowen , Chang Sen , Wang Tengjiao , Liu Gaojie 
Published: June 2019

Abstract
The sulfoaluminate cement was used to prepare the high early strength cement mortar specimens (HESCM) with 0.1%, 0.2% and 0.3% volume content of aramid and carbon fibers, and the contrastive studies of the specimens on compressive and tensile properties were presented in this paper by using of universal testing machine and electronic precision servo tensile test machine. The tests reveal that the addition of aramid and carbon fibers has a positive effect on compressive strength, tensile strength, tensile strain and tensile toughness of specimen, and the bigger the volume content of fiber, the more significant on improvement. What’s further, the tensile toughness has the maximum improvement, while the compressive strength increases minimum, and aramid fiber produces a better improving effect on these properties than that of carbon fiber.
Study on performance of fly ash slag cement grouting materials
Authors: Cui Jingyu , Zhang Wuyu , Ji Xi , Ji Gang-ao 
Published: June 2019

Abstract
In view of the high cost of the existing grouting materials, and at the same time the industrial production of a large number of fly ash, slag and other industrial waste can’t be effectively used. In this paper, the properties of fly ash slag cement with different ratios were studied through laboratory tests. Results show that the cement content in given conditions, with the increase of dosage of fly ash, initial setting and final setting time of cement paste with slow growth, the fluidity is growing, but the stone rate has obvious drop, on the compressive strength, the higher the slag content, is the early compressive strength, the greater the and the higher the dosage of fly ash, the late strength of cement paste were higher. This kind of grouting material has good working performance, can guarantee the project construction needs at the same time save cost, protect the environment.
Study on carbonation technology of alkaline uranium mother liquor
Authors: Xing FAN , Shao-hui KANG , Da-bing LI , Yan SONG , Kang LIU 
Published: June 2019

Abstract
The characteristics of the main components of alkaline uranium mother liquor: A small amount of uranium, a certain amount of hydroxide, and a large amount of carbonate. Through the analysis of chemical reaction and diffusion about transfer between mother liquor and CO2, the influencing factors of mother liquor carbonation were determined: Gas-liquid transfer, reactant concentration, reaction temperature, etc. Tower counter-current was selected to investigate the influence of different types of fillers on carbonation effect. The stainless steel triangular spiral filler was optimized. The filling tower device for carbonation of uranium mother liquor was finalized, which greatly improved the gas-liquid distribution efficiency and carbon dioxide absorption rate. The effect of residual alkali concentration and reaction temperature of mother liquor on carbonation effect was investigated. The technology realizes the conversion of sodium hydroxide to sodium carbonate in the mother liquor. When sodium carbonate is converted to sodium bicarbonate, it can be converted to the saturated concentration of sodium bicarbonate, and CO2 is absorbed in both stages. The device can be used to control the degree of carbonation of the mother liquor according to the demand, and be returned as leaching agent or eluent, realized the full reuse of the remaining alkali in the mother liquor.
Qualitative and quantitative evaluation of small and medium-sized rivers based on data resources
Authors: Fu Lei , Wang Junmin , You Aiju , Yu Jia , Yang Yi 
Published: June 2019

Abstract
Over the past three centuries, due to the improvement of the understanding of the natural environment and social service function of rivers, many countries in the world have started the research and practice of river health evaluation. However, the connotation and definition of river health has not formed a unified standard around the world. Recently, there are many studies on the ecological health of large rivers in China, and a relatively acceptable hydrological and water quality monitoring system has been established for those large rivers. However, the health evaluation of various small and medium-sized rivers is still in the preliminary stage. Though many commonly used evaluation methods have been introduced in China, it is still difficult to carry out health evaluation in small and medium-sized River areas due to the lack of basic data, the difficulty of real-time monitoring, the complexity of index calculation formula and other factors. Based on the current situation of construction, management and monitoring of small and medium-sized rivers in China, this study uses qualitative and quantitative methods to evaluate the health of typical small and medium-sized rivers, and compares the evaluation systems and results of the two methods in order to find a suitable river health evaluation method for typical small and medium-sized rivers in China under limited data resources.
Comparative Analysis on Energy Storage Policies at Home and Abroad and Its Enlightenment
Authors: Xiao Yanwei , Gao Yijing , Kuang Sheng , Sun Ke , Yang Liqiang , Hu Jiansheng , Wang Beibei 
Published: June 2019

Abstract
In this paper, current development of energy storage(ES) in China and the United States is introduced firstly. Then, the typical ES policies of China and the United States are enumerated from the perspectives of general policies and multi-angle policies, which is consists of the generation side, the grid side and the user side. Through the analysis of the policies, the paper expounds the promoting effect of various ES policies on its development and makes a comparison of ES policies in China and the United States. Finally, according to the policies mentioned in this paper, combined with the current national conditions in China, the enlightenment and suggestions on policy formulation of ES are given due to the current national conditions in China.
Brief Analysis on Industrial Restructuring and Diversified Development of Mineral Economy
Authors: Yun DING 
Published: June 2019

Abstract
Under the background that the global mining situation continues to be sluggish and Chinese economy has entered a new normal era, numerous problems are appearing, such as mining exploration financing difficulties, information asymmetry and imperfect market-based management. The combination of “Internet Plus” and “Mass Entrepreneurship and Innovative” with the traditional mining and large enterprises is an effective way of promoting mineral economic transformation and upgrading.
Removal of Vapor-phase Elemental Mercury over a CuO/PG Catalyst
Authors: Cai Simin , Mao Deqi , Sun Jingmei , Xu Can , Xie Xiaojiao , Dong Yanjie , Wang Junwei 
Published: June 2019

Abstract
The removal of gaseous elemental mercury (Hg0) on the palygorskite (PG) supported CuO catalyst (CuO/PG) was studied under N2+O2 atmosphere. This paper describes the effect of CuO loading, reaction temperature, Hg0 concentration and space velocity on Hg0 removal over CuO/PG. The experimental results showed that CuO/PG had a higher Hg0 removal ability than PG, which could be attributed to the oxidation activity of CuO. As CuO loading increased (0-5 wt.%), the ability of CuO/PG to remove Hg0 increased. In the temperature range of 120-210 °C, the highest Hg0 removal ability was at about 180 °C, which might be due to the combined effect of adsorption and oxidation. As the Hg0 concentration and space velocity decreased, the Hg0 removal efficiency increased.
Design and application of eccentric balance flexible pumping unit
Authors: Jinchao XU , Siyuan MENG 
Published: June 2019

Abstract
In the light of the problems of multi-transmission segments, poor movement performance, big volume and weight, large fluctuating range of payload, negative power and torque of beam pumping units, the principle of eccentric balance was suggested, eccentric rotating mechanism is adopted to change the interval of upstroke and down stroke, positive torque with alternating uniformly, energy saving and high efficiency were realized. Basing on the setting up motion and dynamic models of eccentric flexible pumping unit, the motion and dynamic characteristic was analyzed. Field test demonstrated that positive torque can be realized completely, the installed power is decreased 80% and the weight of whole prototype is decreased 25%, system efficiency is improved from 14% to 24.3%, electricity saving reached to more than 50%.
Mold optimization design of metal powder injection product USB interface based on Mold Flow analysis
Authors: Xu Shuqiang , Cao Shukun , Hui Jiheng 
Published: June 2019

Abstract
Metal powder injection molding technology (metal injection molding, the MIM) can achieve a mass in the small and medium-sized complex shape product preparation, low cost, which is of great significance in promoting the production of products and applications.In this paper, taking the USB interface parts made of 17-4ph stainless steel as an example, through scheme verification, the optimized and reasonable die structure is obtained, the 3d modeling of the parts is carried out with UG, and MoldFlow software is used for MoldFlow analysis.The design cycle is shortened and the design quality is improved.
Design and Implementation of Gyro Off-line Test Platform
Authors: Ji Hui , Chen Xiaogang , Ji Haiyu , Chen Ke 
Published: June 2019

Abstract
The off-line test platform of gyroscope is designed, and the functions of the platform are realized by designing the modules such as biaxial electric rotating platform, rotation controller, turntable control software, data acquisition and recording system. It is of great significance for the off-line test and preventive maintenance of gyroscope.
Research on Structural Damage Identification of Truss Structure Based on EMD and Neural Network
Authors: Wang Menghong , Lu Huan , Deng Peiru 
Published: June 2019

Abstract
In this paper, a method was proposed for damage detection of truss structures under natural excitation based on the combination of radial-basis function neural network and empirical mode decomposition (EMD). Firstly, EMD method was applied to decomposing the vibration response data of the rod end node into a series of IMFs (Intrinsic Mode Functions). For the structure’s original response data, after using the EMD to decompose it, the damage information and other useful contents will be distributed into various IMFs. Using neural network’s excellent feature of linear mapping, IMFs are put as an input into the neural network, and the output was compared with the ideal output, which reveals the damage status of the structure. In this paper, experimental analysis and numerical simulation were used to detect the damage conditions of single-damage condition and two different rods in the same truss structure. Good recognition results were obtained.
Study on Improvement of Aging Performance for Gussasphalt Modified by Reclaiming Agent
Authors: Zhong Ke , Sun Mingzhi , Sun Shengkai 
Published: June 2019

Abstract
Gussasphalt has been widely used in steel bridge deck and pavement in China, but it will lead to the pyrolysis aging of gussasphalt binder in the mixing process due to the high temperature and long time mixing. In this paper, the effect of ARA asphalt reclaiming agent on the main performance indexes of gussasphalt at five aging temperatures was studied. It was found that the indexes of penetration and ductility were greatly improved after the addition of the reclaiming agent, and the softening point was regularly reinforced. All the three indexes were improved to varying degrees, which indicates that ARA reclaiming agent had a significant effect on the performance recovery of the gussasphalt after superheat aging.
Design and Analysis of Bionic Rib Subsoiling Shovel Based on Hawaiian Shell
Authors: Tiantao Feng , Lingfeng Xu , Yuepeng Song , Fade Li , Zhanhua Song 
Published: June 2019

Abstract
In order to reduce the tillage resistance in the subsoiling process of soil, this paper uses a three-dimensional laser scanner to obtain the data point cloud on the outer surface of Hawaiian shellfish, and performs curve fitting, and designs 14 bionic ribbed subsoilers with different shapes according to the fitting function. In order to analyze the drag reduction effect of various subsoiling shovels, the average tillage resistance of 14 bionic subsoiling shovels and non-bionic subsoiling shovels with smooth surfaces was calculated. The results show that the tillage resistance of bionic subsoiling shovels is less than that of non-bionic subsoiling shovels, the drag reduction effect of 45 degrees rib angle is better than 30 degrees and 60 degrees, the drag reduction effect is better when the rib width is 30mm, and the number of ribs has no obvious difference.
Analysis of environmental carrying capacity of Beijing-Hangzhou grand canal basin in Zhejiang Province
Authors: Peng Zhenhua , Xu Kaiping , Jin Qiannan , Fu Lei 
Published: June 2019

Abstract
The harnessing and protection of water environment is critical in the comprehensive treatment of the Beijing-Hangzhou grand canal. Zhejiang section of the canal is located in the Hangjiahu plain, and some parts of the canal are still difficult to reach the water quality requirement. Therefore, it is necessary to investigate and analysis the pollutant discharge and water environment capacity. This paper evaluates the current situation of water environment carrying capacity of grand canal in Zhejiang Province, and puts forward pollution control Strategies. Suggestions are also made based on existing problems.
Response Factors and Quantitative Characterization for Moisture Equilibria of Subgrade
Authors: Zhou Zhihai , Chen Fang , Li Cong 
Published: June 2019

Abstract
Water of subgrade soils root in atmospheric precipitation, underground water and wet migration. It is clear that the moisture of subgrade have been inclined to reach equilibrium conditions with surrounding environment after many years for highway operation through investigation for variation law of moisture with seasons alternation. The environmental factors of subgrade moisture can be divided into climate condition and groundwater table based on summary for influence factors of moisture equilibria comprehensively. Prediction method of subgrade moisture consist of conventional estimation, regional classification estimation and enhanced integrated climatic model chiefly. Regional classification estimation has been recommend to forecast moisture equilibria due to quantification for impact of environmental factors on subgrade moisture.
Shear test of the rectangular beam on the new to old concrete interface based on Digital Image Correlation
Authors: Liang Yu , Lei Zhang , Dong Lei , bo Chen 
Published: June 2019

Abstract
The bond property of new to old concrete is the key to strengthen and reinforce the hydraulic concrete structure, and shear strength is an important index of its bond property. With the help of advanced Digital Image Correlation (DIC), the direct shear state, fracture surface displacement, deformation and crack location of the new to old concrete bonding interface are studied through the shear test of rectangular beam, the strain distribution pattern of the bonding interface is well obtained. The results show that the interfacial roughness of specimen has great influence on the shear strength of the repaired specimen. The greater the roughness is, the better the bond property is. Due to friction, the specimen itself will be subject to the combined action of bending and shearing, which leads to bending shear failure of specimen rather than pure shear failure.
Research on the design and application of a monitoring device for bidirectional deformation cracks
Authors: Li Kai-ren , Han Shangyu , Li Yueming 
Published: June 2019

Abstract
The cracks development of geotechnical structures can be generally summarized as transverse deformation and vertical deformation. In order to reduce the difficulty of cracks monitoring and analysis, this paper designs a monitoring device for bidirectional deformation cracks, and analyzes the monitoring principle and scheme of the monitoring device. According to the practical need of bidirectional deformation measurement of geotechnical structures, a set of simple and practical monitoring device is prepared. From the test results, it can be seen that the monitoring device of a monitoring device for bidirectional deformation cracks is convenient to prepare and has high test accuracy, which can meet the monitoring needs of geotechnical structure bidirectional deformation.
Several Problems in Current Implementation of New Concept of Highway Design in China
Authors: Zhu Weiwei 
Published: June 2019

Abstract
Since the new concept of highway survey and design was put forward at the National Working Conference on Highway Survey and Design in September 2004, there are still such problems as lack of wide recognition of new highway design concept, one-sided understanding of the new concept, monotonous road design, and lack of guidance for creative design. Only by enhancing the publicity of new design concept, carrying out multidisciplinary research and exploring new concept design methodology can we sole the above problems and promote the sound and rapid development of China’s highway industry.
Experiment Study on Flexural Behavior of Fire Damaged Prefabricated Hollow Slab Strengthened by CFRP and TRM
Authors: Dong Kun , Sui Zheng-ang , Kexu HU , Jiang Jitong , Derun DU 
Published: June 2019

Abstract
Six prefabricated concrete hollow slabs strengthened with different methods were tested under static loads to investigate the flexural performance and reinforcement effects. First, four slabs were exposed to IS0-834 standard fire for 1 hour, and then respectively strengthened with carbon fiber reinforced polymer (CFRP) sheets or textile reinforced mortar (TRM). Through static loading tests, the cracking load, ultimate load, failure mode of these slabs were recorded and compared. The experimental results indicated that the ultimate bearing capacity and stiffness of strengthened hollow slabs have improved greatly. The slabs strengthened by CFRP have better performance in improving the bearing capacity, while TRM reinforcement method is more effective to improve the stiffness and deformation capacity of the prefabricated hollow slabs.
Influence of cold wave on temperature and stress fields of cylindrical concrete hollow pier
Authors: Zhao Liang 
Published: June 2019

Abstract
Piers attacked by a cold wave, often exhibit uneven temperature distributions, which are direct causes of temperature effects in concrete structures. In order to investigate the influence of cold waves, a three-dimensional transient thermal-structural coupled field method was implemented in a finite element software ANSYS to analyze the temperature filed of concrete hollow pier under a cold wave first. The validity of the finite element (FE) model was verified by the experimental results. After that, the FE model was extended and used to simulate the temperature field and thermal stress of a cylindrical hollow pier under the cold wave. The results show that the circumferential stress under the cold wave is large, and therefore it needs to be considered in the cylindrical concrete hollow pier design.
Study on the Influence of Reinforcement on Creep and Shrinkage Effects of Composite Beams
Authors: Zhang Shengping , Chen Xu , Li Guoliang 
Published: June 2019

Abstract
To obtain time-dependent behaviours of composite beams, the system of differential equations is established by Rüsch constitutive equation of creep. Rigorous solutions of the system are obtained by computer programs of the authors. Creep and shrinkage effects involve internal force redistribution and deflection increase, and these are significantly large for composite beam. Parameter analyse of the reinforcement of concrete slab on these effects is conducted. Among them the reinforcement aggravates significantly the reduction of axial force between individual sections and alliviates slightly the increase of deflection of the beam.