bluuebunny/crossref_metadata_2025_split huggingface dataset:
Casing Failure Characteristics, Prevention and Control Strate gies for Mature Oilfields
Authors: Liu Ying , Feng Mingxi , Sun Guoxin , Liu Zheng , Ma Cui , Zhong Xiandong , Wang Lisha , Liao Ying 
Published: June 2019

Abstract
As the oil and gas fields enjoy a longer and longer production life, casing damaged wells in oil and gas fields increase year by year in number. Assets are at expense, costs are incr eased, and production is threatened. In this paper, the status and mechanism of casing failures in China, USA and Russia are investigated; factors and prevention and intervention measures ar e analyzed; casing failure types, intervals, times and causing factors are studied; failure charact eristics and causes types of mature oilfields are compared and evaluated; and for each different-factor that causes casing failure a corresponding prevention or intervention method is suggested. The studies on casing failure mechanism, detection technology and modeling by overseas countries are worth of reference, and correlative technologies are significant guidance for casing failure prevention and control in our mature oilfields.
A Solution for Indoor Distribution of Overhead Low-voltage Lines in Distribution Network
Authors: Yong Qian , Bin-Bin Zhang , A-Mei Shen , Xiao-Bing Wang , Zhong-Wen Ma 
Published: June 2019

Abstract
The terminal of transformer station in power system is generally related to the household installation of residents. Because of the lack of the security requirements for the original installation mode, this paper presents a new design, and makes a detailed analysis of the new household device. After testing, the new device fully meets the requirements of safety and maintenance for the household distribution of overhead low voltage lines of distribution network. It can be completely applied in the household distribution of low-voltage overhead line terminal.
Ergonomics Rope Self-locking Device Used in Electric Power Construction Field
Authors: Yong Qian , Bo Liu , Guan-Yu Zhai , Bin-Bin Zhang , Xiao-Bing Wang 
Published: June 2019

Abstract
The installation of equipment in power system is generally related to high-place operation where the operator needs to use the self-locking device of safety rope. The traditional self-locking device does not take fully into account the principle of human mechanics, and is not easy to grasp in use. The safety factor is affected. In this paper, the principle of self-locking device is analyzed. The new self-locking device characterized by full function and good use effect is designed, which can better meet the safety requirements of the on-site and high-place operation.
Research Development of Fenton Oxidation and Its Combined Technology in Substation Wastewater Treatment
Authors: Xue Kai , Hou Yaqi , Hou Jiancheng 
Published: June 2019

Abstract
The research progress of Fenton oxidation and its composite technology in substation wastewater treatment is introduced. Study the appropriate conditions for the Fenton oxidation process. The application prospect of Fenton oxidation method in substation wastewater treatment is discussed. The development trend of Fenton oxidation combination technology in substation sewage treatment.
An Efficient Local Search algorithm for Over-Constrained CSPs
Authors: Li Jufang , Chi Yan 
Published: June 2019

Abstract
In industrial experiences of solving constraint satisfaction problems (CSPs), we may often meet an over-constraint situation, which means that we cannot find a solution that satisfies all the constraints. In such situations, the classical CSP is usually extended to take into account costs, preferences, etc. The new objective is usually to minimize the total constraint violation cost or other criterions. The new problems can be described as valued constraint satisfaction problems (VCSP). VCSP can hardly be resolved by the classical constraint satisfying techniques, and this paper provides an application of the Guided Local Search in solving VCSPs.
Complex Network Community Extraction Based on Gaussian Mixture Model Algorithm
Authors: Ting-ting Dai , Yan-shou Dong , Chang-ji Shan 
Published: June 2019

Abstract
Based on the problem of community partitioning in complex networks,this paper proposes a Gaussian mixture model community extraction algorithm based on principal component analysis.The idea of the algorithm is as follows:Firstly,the principal component analysis is used to reduce the dimension of the adjacency matrix of the network;secondly,it is assumed that the communities in a network are generated by different Gaussian models,that is,the generation mechanism of different models is different;The parameters of the model are solved by the expectation maximization algorithm. Simulation experiments show that if the contribution rate of the principal component reaches more than 90%, the network division is very consistent with the actual network,and the time used is also short. Compared with other methods,it has obvious advantages.
Water-Assisted Co-Injection Molding of Non-Circular Tubes
Authors: Kuang T Q , Xu P , Feng Q , Turng L S 
Published: June 2019

Abstract
Water-assisted co-injection molding (WACIM) is a complex and creative injection molding process. A three-dimensional model for WACIM was setup and a k – ω turbulence model was adopted to deal with the turbulent flow of the water. The volume of fluid (VOF) method was used to track the moving interfaces of the skin–inner melt and the inner melt–water. Numerical simulations for the filling stage of WACIM parts with four types of cross-sections were carried out with the computational fluid dynamics (CFD) method. Experiments were conducted to verify the simulation results. The results of the experiments were in agreement with those of the simulations. The cross-section shape of the cavity had a significant effect on the penetrating area of the inner melt, while the shape of the water permeation eventually becomes round. The penetration area of the water increased in the flow direction, and the residual wall thicknesses of the inner melt downstream was thinner than the melt upstream.
Design of a decoupled calibration device for six-axis heavy force sensor based on the orthogonal parallel mechanism
Authors: Lin Sheng , Sun Liguang 
Published: June 2019

Abstract
Six-axis heavy force sensors are widely used in heavy manipulator, but the development of the six-axis heavy force sensor is seriously restricted by the technology of calibration. In order to reduce the positioning error for movement of the sensor or the force source, we employ an orthogonal parallel mechanism as the loading part of the calibration device for six-axis heavy force sensor. The decoupling character is deduced by the force mapping matrix. The calibration device is designed including force source, frame and fixture. The loading mode of the six-axis heavy force is described. The pose error of the calibration device is analyzed. The calibration device can apply the six-axis heavy force simultaneously without moving the sensor or force source.
3D printed pump based on vibrating blades to actively manipulate fluid
Authors: Tang Zhiyong , Shao Xiufeng , Huang Jianze , Ding Guifu , Yao Jinyuan 
Published: June 2019

AbstractThis paper represents a novel working mechanism using vibrating blades to manipulate fluid based on 3D printing technology. A Finite Element Analysis (FEA) simulation has been established to research on working mechanism and driving ability of the vibrating blades-driven pump. The rising popular 3D printing technology is introduced to manufacture the pump, which decreases research time and cost drastically. Herein, a flat oscillating micromotor with extremely low working voltage and power is adopted to act as a random vibration source. The dyeing experiment shows the pump ability of directionally actuating fluid utilizing Fused Deposition Modelling (FDM) 3D printer. A testing system in weighing method is used to test flow rate of different pumps with various structures, receiving a maximum flux of 107.8 ml/min. The pump is characterized by applying structures into pump to actively control fluid. Furthermore, a micropump is printed by a high-resolution 3D printer, which shows potential applications of the 3D-printed vibrating blades-driven pump in manipulating microfluid.
A way to autonomous regulate the scanning speed
Authors: Lei Wu 
Published: June 2019

Abstract
Analysing the basic feature of scanning process, this paper puts forward a new architecture to regulate autonomous scanning speed. In addition, this paper explains and demonstrates how the tracer scanning for successive and self-adjusting scanning speed and autonomy contact level between stylus of tracer and model according to the curved surface. The technical activities shown that the method of copy following error with a proper role and has potential application prospects.
The research of BP Neural Network based on One-Hot Encoding and Principle Component Analysis in determining the therapeutic effect of diabetes mellitus
Authors: Qiao Yuchen , Yang Xu , Wu Enhong 
Published: June 2019

Abstract
The BP neural network is a hybrid algorithm based on One-Hot Encoding and Principle Component Analysis (PCA). In order to make the distance calculation between variables more reasonable, the hybrid algorithm first reduces the dimension of input variables by means of PCA, and then processes the principal component variables with One-Hot Encoding. Thereafter, the BP neural network is established with all the specially processed data. The evaluation system of the diabetes therapeutic effect is established on this hybrid algorithm and the system can reduce the burden of doctors and enhance the treatment efficiency. Compared with the evaluation system established by directly using BP neural network, the BP neural network evaluation system based on One-Hot Encoding and PCA is faster and more accurate in the evaluation of the therapeutic programs of diabetes. It also provides a technological base for the evaluation of therapeutic programs of other diseases.
Research on Automatic Drainage System Technology of Vehicle Gas Storage Cylinder
Authors: Yang Xiaohu , Zhang Ting , Zhang Shimiao 
Published: June 2019

Abstract
In view of the technical problems in the existing technology of the air storage cylinder drainage device in the vehicle braking system, this invention provides an automatic water drainage system for the whole vehicle. An ECU controller is used in this system to control the electromagnetic water drainage valve and sensors to realize intelligent water drainage.
Observation Scheme for Temperature and Deformation of Permafrost Subgrade in Yichun-Bei’an Highway
Authors: Gao Wei , Wang Xu , Zeng Mingming , Han Chunpeng 
Published: June 2019

Abstract
The permafrost in the region of Yichun-Bei’an highway is characterized by thin thickness, high ground temperature and high local ice content, and is in the process of degradation, resulting in highway thaw subsidence and longitudinal cracking, which has a very serious impact on traffic. In order to design the observation scheme reasonably and master the variation law of temperature and deformation of permafrost subgrade, based on determining the observation scheme for temperature and deformation of permafrost subgrade, we established a monitoring system of temperature, humidity change and subsidence deformation of permafrost subgrade after construction by selecting typical permafrost observation sections along the highway, which can provide basic data for the design, construction and maintenance of highway subgrade in permafrost regions.
Study on Expansion Mechanism of Mudstone Under Structural Strength
Authors: Liu Jingyu , Zhang Qianli , Chen Feng , Li Taifeng 
Published: June 2019

Abstract
As the structural swelling soft rock, mudstone’s expansion mechanism is similar to expansive soil, but it has its own particularity. In this paper, based on the analysis of the difference between the undisturbed and remolded samples of mudstone in terms of expansion and deformation, the expansion mechanism considering the strength of mudstone structure was proposed, and the verification test was designed. The following research results were obtained: In judging the potential of mudstone expansion, it is defective to rely solely on the free expansion rate, and its structural strength should be fully considered; The expansive force of mudstone is divided into the external expansive force resisting the external action and the internal expansive force resisting the interaction between internal particles. The external expansive force is the main reason of the increase of the volume of mudstone, and the internal expansive force is related to the cementation strength inside mudstone; The expansion theory based on free expansion rate, expansion force and uniaxial compressive strength is proposed.
Numerical simulation of double-diffusion natural convection in rectangular square cavity with porous enclosure
Authors: Wang Hanqing , Zhao Yue , Tian Ling 
Published: June 2019

Abstract
The double-diffusion mixed convection in a rectangular cavity with a porous structure was studied using numerical simulation. The influence of the Rayleigh number Ra, the porosity of the porous structure, the buoyancy ratio N and the distance of the porous structure from the left wall surface Xp on the flow characteristics were discussed by streamline, heatline, massline, Nu and Sh. It is found that the low floating-to-lift ratio has little effect on the heat transfer. When the buoyancy ratio is 5, the Nu number is linearly positively correlated with the porosity. When N<-1, the heat and mass transfer intensity is inversely proportional to the lift-up ratio.
New possible applications of the augmented-reality in urban design
Authors: Zheng Nanxuan 
Published: June 2019

Abstract
Nowadays, the augmented-reality, usually called as AR, means the overlay of virtual item with a really existing scene. It has been widely used in some areas, like movie industry and design. As for architects, some will use it in the process of design. Instead, the augmented-reality can also be used in urban planning and design. For example, the augmented-reality can overlap the information of the stores with the real situation, and people can easily find the place they need to go to. Also, the augmented-reality can also used to help the developers to collect the information from people, and obtain people’s demand for urban development.
Evaluation guide for green and smart cities
Authors: Zong Jianfang , Li Yan , Lin Ling , Bao Wei 
Published: June 2019

Abstract
A green and smart city is the top-down design of a smart city, and a new-type city integrating intelligence, intensity, green development and low carbon. This paper puts forward a system of evaluation indicators for measuring green and smart cities from ten aspects: resource utilization, environmental governance and environmental quality, ecological protection, urban management and informatization, green and smart transportation, green and smart medical care, green and smart facilities, network security and citizens’ experience.
The Similarities and Differences between Classical Architecture and Modern Architecture in Design Methods and Aesthetic Theories
Authors: Jiang Yu 
Published: June 2019

Abstract
On the surface, classical architecture and modern architecture have huge differences in image. The difference in image between classical architecture and modern architecture shows the difference in design methods and aesthetic theories between the two types of architectures. But in essence, the design methods and aesthetic theories used in these two types of architectures have commonalities. This paper analyzes the design methods and aesthetic theories of classical architecture and modern architecture, and explains their similarities and differences.
Building new think tanks with civil aviation characteristics
Authors: Li Xiong , Chen Xiaoqing 
Published: June 2019

Abstract
To build new think tanks with civil aviation characteristics is an inevitable requirement for advancing the participation of China’s civil aviation in international cooperation and competition, enhancing the scientific, democratic and accurate decision-making capabilities in the professional field, and creating a civil aviation power. Based on the guide and the overall objective of building new think tanks with Chinese characteristics, the related concepts of think tanks and the current composition of think tanks in China’s civil aviation were briefly elaborated. The existing problems and successful cases in the development of civil aviation think tanks were analyzed. Finally, relevant suggestions and measures were proposed from the aspects of mechanism innovation, topic selection, staffing and achievement sharing.
Water quality improvement strategies for a coastal artificial lake
Authors: Zhang G Z , Huang S C , Zhou H M 
Published: June 2019

Abstract
Coastal artificial lakes were encouraged to construct in China for coastal areas remediation. However, it was difficult to keep good water quality. This study investigated water quality improvement strategies for a new coastal artificial lake, located on the coast of Zhejiang Province, China. The expected objectives of water quality in the lake were identified as controlling of algae outbreak accidents under medium eutrophication state, transparency of 1.2 m and ensuring other water quality indicators to maintain or lower than the source water quality. Water exchange was implemented, and the water retention time was designed to be less than 30 days. The sediment could be mostly removed after precipitation in the preliminary precipitation basin. For phosphorus reduction, phosphorus concentration change was predicted by box model. Suppose the active phosphate concentration of inflow water was 0.02 mg/L, when the supplied water volume increased to 18 million m3/a, the active phosphate concentration of the lake could achieve 0.03mg/L. As the water quality was poor in summer, the amount of water supplied was suggested increased. This study established feasible water quality guidelines for sustainable operation, and suggested effective water quality improvement strategies for similar coastal artificial lakes.
The Latest Research Progress of Green Building Materials in Lead and Zinc Tailings
Authors: Liu Qing , Li Yuan , Zhao Guodong 
Published: June 2019

Abstract
In recent years, researchers at home and abroad have used lead-zinc tailings to prepare green building materials for analysis. The main discussion on the preparation of geopolymers and foamed ceramics from lead-zinc tailings is given. The heavy metal curing and radiation-proofing ability of lead-zinc tailings-based building materials are briefly introduced. The results show that the lead-zinc tailings-based green building materials have High strength, heavy metal curing and radiation protection. Finally, the application and prospects of lead-zinc tailings in the field of building materials are analyzed, which provides a theoretical basis for the researchers in the field.
Study on Extraction of Dietary Fiber from Potato Peel by Acid-base Chemical Method
Authors: Li Ci Li , Yu Shi You , Lu Yu 
Published: June 2019

Abstract
In this paper, potato peel were used as raw material. Taking water-insoluble dietary fiber as index, the effects of acid-alkali extraction time, concentration of acid extraction and alkali extraction on water-insoluble dietary fiber in potato peel were investigated by acid-base chemical method. The optimum process conditions for extracting dietary fiber were determined by neutral detergent method. The results showed that the yield of water insoluble dietary fiber could reach 12.6% when the acid-alkali extraction time was 35 minutes, the acid extraction concentration was 1.5%, the alkali extraction concentration was 1.6%.
Structural behavior of self – drilling screws applied in steel structures of prefabricated buildings
Authors: Liu Junzhi , Liu Quan , Feng Yanqing 
Published: June 2019

Abstract
Since the fast development of prefabricated building industry facilitate the light thin – walled steel application in both low residential building and fast construction, better understanding of the labour intensive fabrication of connection indicates the problems of optimized connection design and reduced manufacturing cost can be addressed. Several parameters such as number of screws and configurations of the screw layout were varied to study the impact on shear strength. Since the connection strength governs the structural behavior of the truss system which is the main part of modern thin – walled steel structure, the connection strength is calculated according to the American Iron and Steel Institute (AISI), Euro code, and Chinese specification respectively. The main failure mode occurred in self – drilling screw connections are found to be the tilting and bearing failure based on 84 single lap shear test. All testing specimens have experience four stages. When the spacing is fixed to certain number and the screw is less than six, the effect of configuration patter on the resistance capacity is very limited. In contrast, if the screw number is more than six, certain patter layout could lead to better overall strength compare with normal layout patter and the group effect factor is becoming as a constant. The strength of connection can be increased by enlarging the screw spacing with certain range.
Research on the Innovation of Eco-Cultural Tourism Products of Royal Prime Minister’s Palace in Shanxi Province from the Perspective of Experiencing Consumption
Authors: Hao Yafei , Wang Jinye , Ren Lili 
Published: June 2019

Abstract
With the economic and social development and scientific and technological progress, the experience economy has gradually become the mainstream of social and economic development in a certain area. At the same time, tourism products can no longer meet the needs of tourism consumption upgrading. The contradiction of tourism development is uneven, inadequate and tourists’ experiencing increasing consumer demand has become the main problem that needs to be solved at the current stage of tourism development. In the face of the changes in the tourism consumption market, the Ecological Culture Tourist Area of Royal Prime Minister’s Palace of the 5A Scenic Spot of Shanxi Province actively explores the development of eco-cultural tourism based on experiential tourism consumption. Based on the study of the development of the eco-cultural tourism products of Royal Prime Minister’s Palace. This paper analyzes the innovative countermeasures of the experiential eco-cultural products of Royal Prime Minister’s Palace, and tries to bring inspiration and reference for other scenic spots for the development of eco-cultural tourism products.
Study on the General Model and Main Thoughts of “Non-Waste City” Construction
Authors: Bai Yuan-yang , Guo Zhi-da 
Published: June 2019

Abstract
Under the background of non-waste city construction policy and realistic restraining conditions, this paper combined with accumulated experience and methods during the process of “non-waste city” construction by the international community, thus explored its necessity and the feasibility. In this paper, the basic definition and key links of "non-waste city" are taken as preconditions, and based on the principles of "system integration and collaboration". Finally, the basic component of “non-waste city”construction is established. The main train of thought and specific measures for the construction of non-waste cities are focused. The innovation thoughts and countermeasures for the construction of "non-waste cities" are expected to provide in China.