bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of Welding Sequence on Welding Deformation and Re-sidual Stress of Ear Plate Structure
Authors: Zhang Guizhi , Zhang Liping , Huang Song , Cheng Hao 
Published: July 2019

Abstract
In this study, a three-dimensional finite element model of the welding process of the ear plate structure was established based on the thermal elastic-plastic method. The DOE method was used to design the welding sequence optimization scheme, and the effect of welding sequence on welding deformation and residual stress was studied. The results show that the variation of welding sequence has little effect on the residual stress of the ear plate structure, but has great influence on the post-weld deformation. Considering the field welding conditions, the reasonable welding sequence was determined finally, and it could meet the assembly design requirements of ear plate structure.
Preparation and Properties of Graphene Anticorrosive Coatings for Transmission Towers
Authors: Yang Liu , Xin Li , Yu He Zhen , Ju Zhao Yue , Jing Du , Hui Wang Jian , Li Zheng Yong 
Published: July 2019

Abstract
The transmission tower is one of the largest equipment facilities in the transmission and distribution line network. It is mainly used to support the connection of overhead conductors to ensure the safe and stable transmission of power transmission lines. Due to the vast territory of China and the wide distribution of transmission towers, the operating environment faced by transmission towers is also extremely complex. In addition to the pulling force given by the transmission line, rain, snow, dust, salt spray, acid rain and other substances cause erosion and corrosion on the transmission tower. The use of anti-corrosion coatings is an effective way to avoid erosion and corrosion of transmission tower. Therefore, it is very important to prepare an anti-corrosion coating suitable for transmission towers for the safe operation of transmission towers. Graphene is a new type of functional nano-material that attracts attention. Its special layered structure can effectively shield the material, reduce the internal stress of the coating, and improve the adhesion, mechanical properties, anti-corrosion effect and other properties of the coating.
Performance and Damage Evaluations of Fracturing Fluid in Tight Sandstone Oil Reservoirs
Authors: Liu X F 
Published: July 2019

Abstract
Fracturing fluid from M oilfield, Ordos’s basin, China was investigated. The shear viscosity, emulsification and demulsification performance, residual content in gel breaking fluid, compatibility among foreign fluid and formation water, and permeability damage were separately analyzed. Results show that the fracturing fluid system has better shear properties and sand carrying capacity at high temperature. The emulsification rate reached more than 60%, while the demulsification rate was less than 25%. The compatibility among working fluid and the formation water was relatively poor and precipitation was easily to generate. The residue content in broken gel was relatively low but the residue particles were more likely to enter micro fractures; permeability damage was moderately weak in fractured samples.
Research on Multi-Dimensional Closed-Loop Management and Control Mode of Schedule Investment for Power Grid Infrastructure Projects
Authors: Zhang Jian , Jin Xianing , Song Yi , Yang Weihong , Zhang Mingli , Gao Jing , Yang Bo , Li Zhanjun , Wang Yihe 
Published: July 2019

Abstract
With the deepening of external power transmission and distribution price reform and other policies, the work program of “optimize operation and management strategy, promote quality and efficiency development” within the power grid company has put forward clear requirements for the coordination of multiple majors, such as planning, construction, transportation and inspection, and materials. Starting from the actual management demand of investment chain, we build collaborative control standards of investment, standard control model, the innovative power grid construction project investment in multi-dimensional closed-loop control mode, and apply it to the investment management process, in order to extend investment value management to business terminals, constantly improve the management of scientific, validity and accuracy, and assist the company in multi-dimensional lean management and control.
Research on Investment Demand Forecast of Power Grid Based on Grey System Theory
Authors: Li Hui , Wang Yongli , Peng Dong , Wang Zhidong , Ma Yuze , Zhang Fuli , Zhao Lang , Xue Yawei 
Published: July 2019

Abstract
The forecast of power grid investment demand is of great significance for reasonably arranging the investment of power grid construction funds and reducing the cost of funds. In this paper, a forecasting model of power grid investment demand based on grey system theory is proposed. Firstly, the correlation coefficient method is used to analyze the correlation between the investment demand of power grid and its influencing factors, and the key factors affecting the investment demand of power grid are selected. Then the grey relational grade analysis theory is used to construct the investment demand forecasting model of power grid. The validity and rationality of the model are verified by an example of power grid investment prediction in a certain area. The model is of great theoretical and practical significance for the coordination of power grid investment and the scientific planning of power grid investment scale.
Suggestions on Perfecting the Equity and Dividend Incentive Policies of State-owned Science and Technology Enterprises
Authors: Shude Shi , Han Wang , Yan Chang 
Published: July 2019

Abstract
The implementation of state-owned technology-based enterprise equity and dividend incentive policies is of great significance to improving the enthusiasm of state-owned enterprises’ scientific and technological personnel, reducing the loss of core employees, accelerating the transformation of scientific and technological achievements, and improving the economic benefits of enterprises. However, in the implementation process of the policy, there are realistic problems and obstacles: the first is the scope of implementation of the policy; the second is the unreasonable setting of policy implementation constraints; the third is the inherent thinking and habits of the enterprise; the fourth is the actual operation has concerns and difficulties. Based on the analysis and research, this paper puts forward some suggestions: the first is to reduce the constraints of policy implementation and further enhance the autonomy of enterprises; the second is to expand the scope of policy implementation and appropriately increase incentives; the third is to enhance policy operability by increasing policy advocacy and communication.
Management of Power Supply System for Civil Aircraft
Authors: Lu Xu 
Published: July 2019

Abstract
A control method based on Kinect for robots is proposed in this paper. For the motion control system of two-wheel robot, the method, which is combined with Kinect and DTW gesture recognition, is referred to the field of robotic control, and it can be applied in human-computer interaction system. A series of experiments indicate that this method can realize the dynamic gesture recognition and it has a good performance of real-time and robustness.
Calibrating measured milling force during long-duration monitoring
Authors: Liang Chou-Fu , Zheng Charles M. 
Published: July 2019

Abstract
Piezoelectric force sensor is used to measure cutting force in most milling process to get important manufacturing information. However, the measured milling force may be not accurate due to the charge leak in piezoelectric sensor during long-duration monitoring, which will cause a zero-drift problem in measuring milling force. Measuring milling force with zero-drift problem, the measured average cutting force should be calibrated in order to get correct force information. In this study, the measured first harmonic force components are used to calibrate average cutting force components based on cutting force model. There are two steps in this method for calibrating average force components. The first step uses the measured first harmonic force components to extract the specific cutting constants from the ratio of the measured first harmonic force components in X and Y directions, and the second step utilizes the identified cutting constants to calibrate the average force components. The limitations of presented method are also discussed in this paper. The validity of the proposed method is confirmed through milling experiments.
Objective of Education Reform and Application Idea of Cooperation between college and enterprise on the Course-Education of Construction steel structure fabrication technology
Authors: Jin Xiaoqun , Yao Jian , Sheng and Li 
Published: July 2019

Abstract
Construction steel structure fabrication technology is one of the featured courses in the field of steel structure, and this course is closely related to applied engineering. To better cultivate application-oriented talents, this course adopts the college-enterprise joint lecture mode, adopting revolutionary approaches such as making course plans, constructing internship bases, compiling and editing textbooks and giving jointed lectures together with steel structure companies to enhance the effectiveness of the instruction and improve students’ creativity. Through 10 years of in-depth college -enterprise cooperation, we have achieved remarkable results and temporary success, and we believe our example will provide an exemplary case for the reform of similar courses as well as a new idea for the cultivation of application-oriented civil engineering talents.
Dynamic testing of prefabricated concrete frame hook-type joints
Authors: Gu Wei , Chang Zhongquan , Zhang Xinxin , Zhang Yannian 
Published: July 2019

Abstract
A new type of prefabricated concrete beam-column hook-type joint with simple structure and convenient installation was proposed. In order to comprehensively evaluate the dynamic behaviour of a newly hook-type joint, dynamic tests were carried out on five full size model specimens with different strength grade of concrete and steel bar. The seismic behavior parameters such as failure pattern, bearing capacity, and hysteresis loop and ductility coefficient of each specimen were analyzed, and the strain distribution of post-pouring band were studied. Experiment results show that the destruction process of prefabricated concrete hook-type joints has the initial crack, through crack, beam yield, limit, and destroyed stages. The hysteretic loop is plump and has good plastic deformation ability, and the ductility coefficients are above 3.5, which indicate that the hook-type joints have good ductility. The analysis results shows that the steel bar strains in the post-pouring band continue to increase steadily after the joints yield, which means it has good working performance. Therefore, the hook-type joint of the prefabricated concrete frame have good seismic performance and reliability.
Game model of three-party shared risk allocation for PPP projects ---based on the perspective of incomplete information
Authors: Zhang Peipei , Zhan Kuo , Zhou Ying 
Published: July 2019

Abstract
PPP projects involve multi-stakeholders. Rational allocation of risk among project participants is the basis and key to the smooth operation of PPP projects. In the past, most of the studies have only considered the public and private parties, but ignored the bank as the project participant to share the project risk. Therefore, using the bargaining game theory, this paper bulids a bargaining game model in which the three parties (government, enterprise and bank) of PPP project deter each other under incomplete information, and works out the corresponding sub-game refined Nash equilibrium, then obtains the proportion of risk sharing among the three participants. The research results provide a scientific basis for project participants to make decision on risk sharing, which is conducive to improving the willingness of project participants to cooperate, and also play a supplementary role in PPP project risk sharing research.
3D visualization of urban underground pipelines by using SuperMap
Authors: Wen Feng Kai , Wen Lan Gui , Juan Yue Xiao , Yang Pang Li , Yu Tao Yan 
Published: July 2019

Abstract
For the complicated structure and spatial relationship of urban underground pipelines, it’s necessary to employ 3D visualization technology in pipeline management and maintenance. It’s not efficient to use 3D modelling software such as 3DS MAX in building a large range scene, and it’s difficult and cumbersome to develop the functionalities for 3D visualization of urban underground pipelines from scratch by using the programming APIs such as OpenGL and DirectX3D. In this paper, based on the 3D visualization controls and interfaces by SuperMap, an adaptive method is proposed for building 3D models of urban underground pipeline network. At first, the detailed models of the pipe points and pipe segments are designed by 3DS MAX and imported as map symbols into a SuperMap Symbol library. Then the whole pipeline network is loaded and transformed into a 3D scene by using SuperMap interfaces. Moreover, the 3D models of the ground objects such as buildings are cached in OSGB format, and rendered with underground pipelines to support interactive queries and some professional analysis.
The Research and Control Measures of the Influence on the Complicated tie-line and the Bridge under the Shield Tunnel
Authors: Wang Hao , Liu Junyan , Zhang Liangliang 
Published: July 2019

Abstract
The analysis and calculation of the influence of Shield Tunnels Crossing Existing Railways and bridges considering the time-space effect is of great significance to the risk control of shield tunnels. Taking the long-distance bus station-production Road station section of Jinan rail transit line R2 as an example, shield tunnelling method is used to construct the shield tunnels in this section, and the shield tunnels are crossed under the Beibei Bridge of Beijing-Jiaozuo Liaison Line and Beijing-Shanghai Link In order to study the influence of shield tunnelling on railway and bridge piles, three-dimensional finite element numerical analysis method is used to establish a three-dimensional finite element analysis model through MIDAS/GTS. The position relationship of shield tunnels, railways and bridge piles and the shield tunnelling distance are simulated. The stress of railway subgrade and pile foundation caused by shield tunnelling is analyzed. The result of deformation is within the allowable value of deformation control of railway and bridge. Without any reinforcement measures, through monitoring the deformation of subgrade and bridge, timely feedback of monitoring information and timely adjustment of shield tunnelling parameters, shield tunnelling can safely Cross railway and bridge. The development of similar projects will provide relevant reference.
Detection of Total Corrosive Sulfur in Transformer Oil
Authors: Wan Tao , Ye Huisheng , Zhou Ting , Gong Shangkun , Huang Haibo , Qian Hui 
Published: July 2019

Abstract
The quantitative analysis methods of the total corrosive sulfur (TCS) in transformer oils were realized using copper powder corroding technique. In this technique, excess copper powder reacted with insulating oils at 150°C for 12 hours to form corrosion product (CU2S). Then, Cu2S was oxidized to CuSO4
2−, and finally dissolved to sulfate solution. There are three methods to test the amount of TCS. SO4
2− solution tested by ion chromatography (IC) or Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES). Moreover, adopted ICP to test total sulfur (TS) in oils before and after corrosion reaction, and the difference value is the content of TCS. Comparing with these methods, it was found that ICP detection of total sulfur (TS) in oils could achieve excellent linearity. The correlation coefficients is R2≥0.999, and the recovery rate is 98.4%∼103.4%.
Analysis of Reinjection Water to Improve Water-flooding Effect for Low-permeability Sandstone Reservoirs
Authors: Gao Pengpeng , Qu Le , Sun Wei 
Published: July 2019

Abstract
Years of oilfield development practice indicates that the quality of injected water plays an important role in the water-injection process to improve the development effect. The low-permeability reservoirs have low yields and strict requirements on water quality indicators, and it is urgent to study the process of oilfield produced water treatment. The damage source and mechanism of re-injection water was discussed, and the compatibility between the reinjection water and the formation of water was analyzed and evaluated. The treatment process of water reinjection was studied, and the recommended indexes on injection water quality for low-permeability reservoirs for water-flooding development was given in this paper that provides a theoretical basis for the research of oilfield water-flooding development and injection water quality indicators for the future.
Research Status and Prospect of Downhole Acceleration Technology Based on Drill String Vibration
Authors: Zhang Guohui , Chen Rong , zhang Xiwen , Hu Gui 
Published: July 2019

Abstract
Drilling acceleration technology has been a research hotspot in the field of drilling engineering. It is an important research direction in the field of ultra-deep well acceleration to find new energy available underground and develop a matching energy conversion method to improve rock-breaking efficiency. In this paper, the characteristics of downhole available energy are analyzed, and the concept of using vertical vibration energy of drill string to increase the speed of rock breaking assisted by jet pressure of downhole drilling fluid is expounded. This paper summarizes the structure and advantages of the developed downhole drilling string vibration reduction and pressurization device and multi-effect synergistic speed-increasing drilling device, and looks forward to the future development direction of deep-well speed-increasing equipment. The acquisition and rational utilization of downhole energy is an important research dirction for the development of speed-up tools in the future.
The Development and Analysis of Primary Frequency Regulation and AGC Test in Shandong Power Grid
Authors: Yu Qingbin , Xin Gang , Cao Yongji , Li Yuanyuan , Yan Qing 
Published: July 2019

Abstract
Based on the 2018 entire-gird primary frequency regulation and AGC test, the concrete procedures and obtained results of Shandong power grid are analyzed at length. In combination with the published standards and specifications, the new techniques adopted in the test are analyzed. And then, according to the emerging problems during the test, the improvement measures and optimization suggestions are proposed. With the help of analyzed results and proposed advices, the further technical supervision work of source-network coordination can be developed and thermal unit performance can be improved.
Study on Optimum Design of Support Technology for Large Section Belt conveying Roadway
Authors: Baichao Song 
Published: July 2019

Abstract
Aiming at the problems of slow excavation speed, large support workload, large number of assistants, high excavation and support cost in belt conveying roadway in a mine at present, the finite difference software FLAC3D is used to establish the numerical simulation model based on the production geological conditions, Through numerical calculation, reasonable supporting parameters such as bolt diameter, length, spacing between rows, number of anchor wire and spacing between the two are determined to support a belt conveying roadway, that realized the optimization of roadway support, improves the driving speed and guarantees the normal continuity of production.
Technical Inspection of High Strength Bolts in Hydropower Plant: Physical and Chemical Inspection
Authors: Li Wenbo , Liu Lanlan , Wang Jun , Xie Yi , Chen Junjun , Hu Jiarui , Sun Lipeng , Long Yi 
Published: July 2019

Abstract
As an important connection part of metal equipment, bolt is widely used in hydraulic power plant. However, the bolt fracture of hydropower plant occurred occasionally, which seriously affected the stable operation of hydropower plant. Based on the analysis of the fracture bolt, the quality problems of the bolt were found: (1) the material is not qualified, (2) the mechanical properties of the bolts are not qualified. Because the misuse of the material and the wrong execution of the heat treatment, the actual strength of the bolts could not meet the nominal strength, leading to the fracture of the bolts during term of service. The detection of chemical composition and hardness testing can effectively monitor the testing quality of bolts, and prevent unqualified bolts into the installation and operation.
Effects of different economic fruit forests on soil nutrients in Qingxi small watershed
Authors: Wang Qianxin , Sun Bowen , Xiong Mingbiao , Yang Yuanxiang , Hou Jun , Sheng Yuzhang 
Published: July 2019

Abstract
Taking Qingxi small watershed in Hanyuan County of Ya’an City as an example, the effects of four different economic fruit forests on the sloping farmland in the dry-hot valley region on the soil nutrient loss before and after the flood season were studied. The results showed that after the flood season, the soil Organic matter(OM) content of the four economic fruit forests increased, which was characterized by large cherry forest > peach forest > pear forest > pepper forest, but no crop cultivated land decreased. Alkali nitrogen(AN) and Available phosphorus(AP) of four economic fruit forests decreased, but the degree of declining was lower than that of cropless cultivated land. The Total nitrogen(TN) content of the soil of the cherry forest and peach forest decreased, but the degree of declining was lower than that of the cropless cultivated land, while the pear and pepper forests increased. The large cherry forest and pepper forest content of Total phosphorus(TP) in the soil was reduced, while the peach and pear forests increased. In terms of OM, large cherries are the best choice for local fruit forest. Pear trees are the best choice for the change of N or P elements. From the comprehensive analysis of soil nutrient changes, pear trees are the best fruit forest in the region.
Study on Mining Technology of Shallow Hole + Deep Hole Shrinkage method with Ductule Grouting in Advance for Roof Reinforcement
Authors: Xia Jianbo , Cheng Yong , Zhao Mingliang , Liu Cong , Wen Yiming 
Published: July 2019

Abstract
In this paper, the mining method of shallow-hole and deep-hole shrinkage with ductule grouting in advance for roof reinforcement is studied, which is used to recover steeply inclined thick orebody with broken roof. The main innovations in mining technology are as follows: the orebody is artificially divided into two layers, the upper layer is mined by shallow hole blasting, the lower layer is mined by parallel deep holes, both layers advance simultaneously from bottom to top, the mining face of the upper layer is 3.6 meters higher than that of the lower layer, thus forming an inverted step working face in which the mining operation and roof protection are carried out, using ductule to reinforce the broken roof by grouting in advance, and arranging bolts systematically to anchor the grouting reinforced layer into deep rock mass. By using the method of orthogonal test design and in-situ experiment, the reasonable construction parameters of ductule grouting are obtained, which have been applied to No. 7 stope of of stage 3840 in Qaza Lead-Zinc Mine in Yunnan Province and achieved good results. By monitoring the displacement of reinforced layer during and after mining, no obvious displacement and collapse are found, which proves the feasibility of this technology. The mining scheme has a good reference value for similar ore deposits with mining technical conditions.