bluuebunny/crossref_metadata_2025 huggingface dataset:
High Efficiency Dye Sensitized Solar Cell from Tectona Grandis and red Crysanthemum Morifolium as a Sensitizer
Authors: Tahir Dahlang , Abidin Ruzaini H. , Gareso Paulus Lobo
Published: September 2019

Tectona Grandis leaves and red Crysanthemum Morifolium have been used as sensitizers for dye sensitized solar cell (DSSC) using organic solvents by ethanol, citric acid, and distilled water in respectively with the ratio of 5 : 1 : 4. TiO2 paste was spin-coated on top Indium Tin Oxide (ITO) conductive glass and calcinated at temperature of 450°C for 10 min. The chemical properties were analysis by using Fourier transform infrared spectroscopy (FTIR) indicated the presence of anthocyanin from Tectona Grandis leaves and red Crysanthemum Morifolium petal. The physical properties were analysis by using UV-Vis spectrophotometer was performed to measure the absorbance of dye solution in the visible spectrum range and X-Ray Diffractometer (XRD) was used to determine the structure of TiO2/ITO and Dye/TiO2/ITO. Among the three dyes studied, the mixed dye solution from Tectona Grandis leaves and red Crysanthemum Morifolium was shows the best photosensitization effects with the conversion efficiency is 0.834 %.
Characteristic of Coal Deposits in the East Kolaka, Southeast Sulawesi Province
Authors: Deniyatno  , Armid A , Harisma  , Anshari E , Hasan E S
Published: September 2019

Coal deposits in Southeast Sulawesi may not be large, one of the occurrence and deposit has been recorded in the Tawanga Village, East Kolaka Regency, Southeast Sulawesi Province. The study area is part of Southeast Arm of Sulawesi and the occurrence of coal is indicated from Meluhu Formation (TRm) which uncomformably overlying with schist of the Mekongga Complex (Pzm). In this study, field survey and proximate analysis of coal had been conducted to determine the distribution and quality of coal. Six coal samples from different area were subjected to the proximate analysis and the comparison of different properties including moisture content, volatile matter, fixed carbon, ash content and calorific values has been studied. The study is aimed to characterize of coal in the area through proximate analysis method. Field survey showed that the occurrence of coal as thin layers or lenses set in shale with thickness is vary from 5 to 20 cm. The analytical evaluation of properties showed the value of fixed carbon content 5.2 to 12.4%, the ash content 8.4 to 35.7%, the total moisture content 47.1 to 73.0% and volatile matter 7.0 to 10.7%. The analytical results suggest the existing of coal in the study area is classified as low rank calorie with the calorific value ranges between 1246.7 to 3644.6 cal/gr (adb).
Analysis of salt pond cluster in Arungkeke sub-district Jeneponto Regency
Authors: Sakka  , Baharuddin  , Samad W
Published: September 2019

Jeneponto Regency is one of the largest national salt production locations in South Sulawesi. One of them is located in Arungkeke Sub-district with a land area of 328.61 ha (21.62%), but salt pond activities in this area are still carried out traditionally, so that not all locations can produce and some produce less than 71 tons / ha with NaCl levels <90% and not meeting industry salt standards (NaCl> 97%). This research was conducted to analyse the area of salt ponds based on clusters on the similarities they have in managing salt ponds. The results showed that the total area mapped by 243.9 ha could be divided into 14 clusters / groups with a wide range of 10-30 ha / cluster. Each cluster is divided into bozem ponds, weeds and salt tables with a ratio of 5: 3: 2. The channel network system to be developed is divided into two primary channels, namely SPPA1, and SPPA2 and two secondary supply channels, namely SSPA1.1 and SSPA1.2. The filling of water into the ponds of each cluster can only be done using a pump with a water debit requirement ranging from 0.116 - 0.347 m3 / s. To achieve good salt quality, increasing the density value is carried out in stages, namely in bozem, hatchery and salt table are 4 - 11 °Be, 11-22 °Be and 22-30 °Be, respectively.
Numerical Simulation of Water Control Technology in Deep Water Gas Reservoir
Authors: Zhong LI , Yong-bin GUO , Meng Wen-bo , Zhang Chong , Jiang Dong-lei , Tang Xian-di
Published: September 2019

In recent years, large deep-water gas fields such as Yacheng and Lingshen have been discovered successively in deep-water exploration in the South China Sea, with huge reserves. However, bottom water is ubiquitous in deep-water gas fields, which seriously affects gas reservoir recovery. Therefore, it is beneficial to improve the development effect of gas reservoirs to clarify the water invasion mechanism and law of bottom water gas reservoirs. Based on the study of water invasion law of deep water gas reservoir, the development effect of deep water gas reservoir under different water control technology conditions is evaluated by numerical simulation method in this paper. It provides a strong basis for rational and effective development of deep-water gas reservoirs and water control and waterproofing technology.
Consideration and Discussion on Green Highway Construction in Urban Area
Authors: He Qinghua , Yue Weijie , Lu Hui , Chen Chao , Li Zhengkai , Wang Zhaoming
Published: September 2019

Green highway construction is the concrete action of the highway industry to continuously improve the development concept. It is the inheritance of green and mysterious low-carbon highway in the new period. Green highway is the use of energy saving, low-carbon and environmental protection technology in the new period. Urban roads are crisscrossed, pipelines such as gas, electricity and water conservancy are densely distributed. The sensitive points such as villages and hospitals are widely distributed, and land pressure is high. These complex characteristics make construction difficult. Therefore, it is of great significance to focus on the construction of the urban road green transportation technology demonstration project with the theme of “green construction and safety first” and build a green highway with urban characteristics.
Research on Intelligent Multiple Interchange Induction System of Huadu to Dongguan Highway
Authors: He Qinghua , Yue Weijie , Lu Hui , Lin Haiteng , Chen Chao , Li Zhengkai , Wang Zhaoming
Published: September 2019

Urban expressway is an important part of the urban traffic network, which is also the main artery of urban traffic system. The rationality of interchange has a direct impact on the functions of “rapid patency” and “safety comfort” of urban roads. This paper taking Taicheng multiple interchange as the research object, which from expressway Huadu to Dongguan, focuses on improving traffic efficiency, induction accuracy and safety. This research is carried out from making the lines and mark, making high-precision navigation map, and making guidance system to provide solutions for Taicheng interchange.
Research on Intelligent Control Positioning Detection System Based on Machine Vision
Authors: Miaona Chen
Published: September 2019

In recent years, China’s economic level and technology level have been significantly improved, so people have developed an intelligent control positioning detection system based on machine vision. The generation and application of this positioning system effectively improve the accuracy of positioning, and its stability is also very high. Therefore, the emergence of this system has met the current high-efficiency production requirements of the manufacturing industry and has a positive impact on the development of the manufacturing industry. In this paper, the intelligent control positioning detection system based on machine vision is deeply analyzed, and the author’s own opinions are presented for reference.
Optimization Selection of Bit and Application Research on PDC + Motor Combination Drilling Technique in the Desert Oilfield
Authors: Gang Yu , Kun Ning , Jinsong Tong , Xiangji Kong , feng Qian , Junbiao Liu , Huabei Zhang
Published: September 2019

The drilling speed has a lot to do with whether the selected bit type and formation type is matched. Choosing a reasonable drill bit type can achieve the goal of high speed and low cost drilling by improving drilling rate and reducing the occurrence of down hole trouble. On the basis of performance analysis of PDC bits, the linear relationship between rate of penetration and drilling footage is obtained. By means of the optimization of motor and parameters, the drilling parameters, such as weight on bit, torque, type of mud motor and operating temperature, are optimized by application in desert oilfield. It provides an effective reference for the rapid development of the same type of oilfield
Research on Construction Technology of Extended Arm Truss of Super High-rise Building Steel Structure
Authors: Zhang Zhe , Yang Qijian
Published: September 2019

As a special type of construction technology for super high-rise buildings, the steel structure outrigger truss construction technology can effectively improve the overall stability of buildings, taking into account the safety and economic characteristics. Based on the present situation of technology implementation, this paper first introduces the present situation of steel structure extension truss construction technology of super high-rise buildings, then explores the technical advantages and value of steel structure extension truss construction of super high-rise buildings, and puts forward the optimization strategy of steel structure extension truss construction technology of super high-rise buildings, hoping that it can effectively improve the construction application level and create conditions to promote the development of the industry.
Resource Utilization of Solid Wastes from Industry and Mining Industry in the Building Materials Field
Authors: Chen Hao
Published: September 2019

With the development of the country, the production of industry and mining is received widespread attention. However, during actual production, solid wastes appear frequently, and there is no efficient way to deal with them comprehensively, which leads to serious pollution to the ecological environment. This paper mainly expounds the sources, characteristics and application and prospect of industrial and mining wastes in building materials. Converting solid wastes into building materials can economize natural resource and ease the problem of resource exhaustion. It turns waste into treasure, turns harm into the benefit and generates huge economic benefits, which is also the comprehensive utilization of solid wastes and a critical way to sustainable development.
Application of Adam-BP neural network in leveling fitting
Authors: Dong Zhouyang , Xu Weiming , Xu Jian , Zhuang Hao
Published: September 2019

According to the accuracy of BP (Back Propagation) neural network in leveling fitting, an improved BP neural network model is proposed. In order to overcome the defect of the low convergence rate and local minimal in leveling fitting. The BP neural network is improved by using Relu (Rectified Linear Units) function as network activation function and Adam (Adaptive Moment Estimation) algorithm as network optimization function. The experimental results show that the improved BP neural network can effectively improve the accuracy.
Deciphering the inner structure of Cycloseris vaughani
Authors: Li Yixin , Han Tingyu , Yang Sifan , Wang Xiaopeng , Chen J.-Y. , He Chunpeng , Lu Zuhong
Published: September 2019

Reef-building corals are the primary component of coral reefs and are significant for marine ecosystems. However, currently coral reefs are declining globally due to El Niño, ocean acidification and overexploitation. To maintain coral populations and reduce the impact of ecological threats, it is crucial to understand the structures and formation processes of coral reefs. Large-scale microtomography can reveal the structures of entire coral reefs at the resolution of micrometres, providing an effective and innovative way to study the formation of coral reefs. Here, we use this technique to capture the entire structure of a reef-building coral in the Fungiidae from the South China Sea, Cycloseris vaughani, a reef-building coral of high ecological and economic value. In this study, we investigate its distinctive skeletal structure and growth rings. Reconstructed results exhibit microporous tunnels in the central mouth area and radiant rib-shaped skeletons surrounding the mouth. Our work promotes an in-depth understanding of coral structure while also providing a novel research approach for the protection of coral reefs. It also shows that large-scale microtomography is an effective method in tracking the growth process of reef-building corals, facilitating the understanding of coral biological characteristics, and filling the gaps in current coral research.
A novel interpolation square root model for multi-scale spatial database
Authors: Gong Xianyong , Cui Xiaojie , Xing Ruixing , Liu Chengyi
Published: September 2019

The amount of map information is an important issue for multi-scale map making and spatial database producing in Cartography and Geographic Information System. Considering the multi-scale situation, a novel interpolation square root model for multi-scale spatial database is proposed. First, the limitations of the traditional square root model are analysed. Though some extensions were suggested, it is still incapable of guaranteeing the logic and quantity consistency in the multi-scale situation. Then, the improved novel interpolation square root model is proposed considering both the data at two-end neighbor source scales as control constraints.Finally, the experiments and comparations on real multi-scale Topographic Database from the National Land Survey of Finland show that the proposed interpolation square root model is valid and outstanding in ensuring the logic and quantity consistency and continuity.
Development of GPS Positioning and Navigation Software System Based on VC++
Authors: Zheng Jinming , Mahan  , Xie Fengyu , Yangjun Zhang
Published: September 2019

With the rapid development of China’s economy, the field positioning and navigation technology has also been continuously developed. The global positioning system(GPS), can provide fast and accurate positioning and navigation for exploration operations in desert areas. In this paper, the developed GPS navigation and positioning software system solves the problem of cooperation between GPS user terminal equipment and exploration site. It also effectively combines image processing, data transmission, data processing, error analysis and other technologies to achieve the goals such as data recording and transmission, field navigation, data browsing and query, coordinate transformation, error analysis, and printing curve. After field test work and post-data processing, the software proved to have the following advantages: convenient operation, accurate coordinate transformation and complete functions. It could meet the requirements for accurate GPS positioning and navigation of the field exploration. Its practical effect is good and can provide reference for future field exploration and navigation mapping.
Research on New Rural Housing Construction
Authors: Xu Xiwen , Jin Guanghu
Published: September 2019

Building a new socialist countryside is a strategic measure to build a socialist harmonious society and a historical task in the process of China’s modernization. At the same time, the industrialized residential industry will be an industrial project with strong system, outstanding personality, large investment scale and excellent comprehensive benefits. Here, the new countryside will be combined with the industrialization of buildings to explore the development path of new rural construction.
Urban Renewal Strategies for Application of the Agreement Co-Construction Approach
Authors: Chen Ming-Yuan , Liu Shih-Yuan
Published: September 2019

Currently, Taiwan leads urban renewal via public participation style with the government playing the role of critical decision-maker. The problem of urban aging is a common phenomenon faced by the global cities. According to the Ministry of the Interior statistics in 2018, old houses more than 30 years in Taiwan are more than 4.27 million; 0.77 million old houses in New Taipei City, accounting for 18%; and 0.69 million old houses in Taipei, accounting for 16.2%. However, the current progress of urban renewal is slowly stagnating. From 2006 to 2018, the approved urban renewal case was only 449 cases, approximately 35 cases per year, only nearly 2,000 households. Although the government strongly promotes the urban renewal policy, it is limited by the policy implied that it cannot be implemented and promoted. In addition, excessive emphasis on the sound of living justice, the lengthy review process, and the inability to implement various supporting measures have made urban renewal more difficult. In particular, the adoption of the “Agreement Co-Construction Approaches” method for urban renewal is even more difficult. Base on this, this study uses empirical case studies and content analysis methods to analyze the challenges of urban renewal through the “Agreement Co-Construction Approaches”, and further proposes specific countermeasures and recommendations, to enable Taiwan to accelerate the urban renewal process, and provide developing and developed countries specific reference for urban renewal planning and promotion strategy in the future.
Research on the design of characteristic space in exhibition architecture
Authors: Yang Siyu
Published: September 2019

From the point of view of using function, exhibition architectures have their particularities in space composition. Spatial organization order is different from other buildings. It needs a free and infinite space form to guide exhibits to communicate with tourists. On the basis of understanding the characteristic space of existing exhibition buildings, this paper analyses the space design countermeasures of exhibition architectures.
Beauty of Slope Land: Strategies and Practice of Slope Landscape Planning
Authors: Li Y , Zhang R , Shen D W , Wang X Q
Published: September 2019

In the process of slope landscape planning, landscape designers should fully combine local climate characteristics, excavate cultural connotations, integrate architectural functions, and use appropriate landscape order and rich hierarchical layout strategies to better integrate the artificial environment with the natural environment, so as to shorten the distance between man and nature, highlight local characteristics and attract resonance. In the practice of landscape planning project of Wuxi People’s Hospital in Chongqing, the designers made full use of the summarized planning strategies and achieved the desired results.
Research on the Long-term Tensile Strength of Geogrid in Reinforced Soil Structure
Authors: Liu Bin
Published: September 2019

The long-term tensile strength of reinforcement in geogrid reinforced soil structure is an important design parameter. The reduction factors of geogrid, such as installation damage, creep, chemical and micro-biological degradation during construction and operating in the soil must be considered to decide the long-term tensile strength. According to the lab test results, the strength of geogrid in soil and air is compared, and the tensile properties of HDPE geogrid with different strain rates have been studied. In addition, the installation damage reduction factors in five poorly-graded granular fill have been put forward. The creep test method and creep reduction factor have been raised. Finally, the durability reduction factor is discussed in this paper. These results can be used as a reference for future design of geogrid reinforced soil structure.
Study on the Application Technique of Vertical Pre-stressed Anchor Retaining Earth Wall in Landslide Field
Authors: Yuan Lei
Published: September 2019

Based on the landslide treatment project of the highway in Tai-hang mountain region, the mechanism of one particular small sliding slope has been analyzed. By using the methods of engineering geophysical prospecting and geological prospecting, it has been confirmed that the landslide is a traction-extended shallow gravel landslide. Due to the principle of minimum cost and operational, the pre-stressed anchor retaining wall has been proposed to treat this kind of land sliding. The pre-stressed anchor in the basement could have the slope sliding force been balanced, which it would significantly reduce the working amount. Also, it could cost much less than other options. The design thought has been analysed in the paper, along with the introduction of the construction key points and techniques. Affection of the treatment turned out well, which indicates that it is a good example for treating similar geological disasters.
The Word Formation Characteristics of English New Vocabulary in the Internet Age
Authors: Liaojie
Published: September 2019

With the development of Internet technology, people’s lifestyle has undergone great changes, and it also affects people’s language. As an international language, English has evolved and innovated on the Internet as a platform for people to communicate. A lot of new vocabulary has been born. Because it is produced in the specific context of the Internet, it has the personalization, diversification and simplicity of the Internet, freedom and entertainment. As a new language, online English new vocabulary has been widely concerned and loved by people. Internet users can send e-mails on the Internet, e-shopping, e-commerce, etc., all of which require netizens to master certain new vocabulary of online English to be more convenient and effective. Make good use of online media to improve the communication skills of the network. Based on the analysis of the reasons for the new vocabulary of online English, this paper analyzes the word formation characteristics and word formation rules of online English new vocabulary.
A Comprehensive Index for Wind Environment Evaluation of Green Building Arrangement
Authors: Zhao Shuming , Li Qianqian , You Xue-yi
Published: September 2019

Green building is the core topic of human habitat construction. A comprehensive index of wind environment is proposed to evaluate the quality of wind environment of green buildings. Five evaluation indices are extracted from the regulatory requirements of green building and the local meteorological wind field is considered in the comprehensive index of wind environment. The five evaluation indices are calculated by the computational fluid mechanics software FLUENT with the RNG
k−ɛ
turbulence model under the condition of different wind directions. The weight of five evaluation indices is determined by the analytic hierarchy process. The wind environment of an urban community is evaluated by the proposed comprehensive index in four seasons. The proposed comprehensive index is favourable to evaluating the quality of green building and optimizing the shape and arrangement of buildings.
Genetic and variation analysis studies on landscape genes of traditional Tibet and Qiang watchtower villages in western Sichuan
Authors: Wei Xiong
Published: September 2019

Based on the biological characteristics of genetic inheritance and variation, taking the traditional Tibetan and Qiang watchtower villages in western Sichuan as the research object, four gene types were classified according to their genetic composition and importance, including the main gene that dominates the settlement pattern, accessory genes of architectural function and network system, mixed genes of building materials and architectural aesthetics, variant genes of settlement growth model, distribution form, internal spatial layout form and architectural form. Combined with history, regional environment, social environment, demand and other factors, this paper analyzes the characteristics and variation trend of its heredity and variation, clarifies the stability and core of the landscape gene prototype of traditional watchtower village of Tibetan and Qiang, and puts forward that landscape genetic variation is one of the important reasons for the diversity and richness of regional landscape culture.
There Has Been a Long Road for Blind Road--Dujiangyan Blind Road System Research Based on Space Perception
Authors: Zhong Haijie , Chen Youjia , Chen Zhichao
Published: September 2019

In recent years, with the continuous increase of the number of blind people in China, the construction of blind roads and their ancillary facilities has become the focus of urban road pedestrian space planning and design. However, in practical use, the existing blind path does not really solve the problem of blind people’s travel and there are few blind people on the blind path. We use part of the primary and secondary trunk road and branch of the blind road in Dujiangyan city as an example. By simulating the blind, feeling the blind track system in person, using the SD method to evaluate the status quo of the use of the existing blind road, we analyse and summarize the blind road system of Dujiangyan city from the angle of space perception, so as to provide certain reference and reference for the blind road system planning of city road pedestrian space.
Research on the Executive Performance Evaluation Model of Large Energy Enterprises
Authors: Zhao Jian , Huang Lei
Published: September 2019

Accurate performance evaluation and scientific compensation structure are significant to solve the dilemma of corporate governance principal-agent and realize the long-term benefit sharing between executives and shareholders. This paper takes BP as the research object, analysing performance evaluation model and compensation structure of BP’s executive. The performance evaluation model has six factors which are safety, reliable operations, financial performance, total shareholder return, return on average capital employed, and strategic priorities. Indicators, weights and evaluation criteria of performance evaluation are constructed in the model. Algorithm for computing compensation structure is also provided.
Wind-induced fatigue analysis of wind turbine steel tower
Authors: Gao Qingshui , Liu Shi , Fan Jian , Shen Zhongming
Published: September 2019

In this paper, a wind turbine tower with a hub height of 60m is taken as the research object, and its wind-induced fatigue analysis is carried out. First, the general method of wind-induced fatigue analysis of the wind turbine tower is given. The maximum stress time history curve of the tower is calculated by the time history analysis method. The stress amplitude, the mean value and the cycle times of the stress time history are counted by the rain-flow counting method. Finally, the fatigue life of tower is calculated by linear damage theory. According to the study, the fatigue life of the wind turbine is greater than that of the design service life, and it can meet the requirements of the design. The influence of wind load on the fatigue damage of the tower is different from the wind load of different wind speed and wind direction.
Study of Microcosmic Distribution Regularities of the Remaining Oil after ASP Flooding
Authors: Meng Fan , Yi-kun Liu , Ji-qiang Zhi
Published: September 2019

The ASP flooding is an effective method to enhance oil recovery. The main mechanism is to increase the viscosity of injection water by polymer, which reduces the mobility ratio of displacing fluid and displaced fluid so as to expand the sweep volume. The second mechanism is to improve the displacement efficiency by the combined interaction of surface active agent and alkali, which reduces the interfacial tension and improves the wettability of reservoir. The recovery of the ASP flooding usually can raise 10% more than the conventional polymer, but there are still a lot of underground crude oil residues after flooding. So we need take some other methods in order to further improve oil recovery factor. For the research of the ASP flooding microscopic remaining oil distribution, it is still blank all over the world. This paper studies on the microscopic remaining oil distribution after the ASP flooding by using both laser confocal technique and modern physics experiment simulation method. The result shows that the remaining oil is mainly Thin Film Type and Clusters Type, most of them are heavy oil which cannot be flooded easily. It can be a certain reference value for further study on the choices of enhanced oil recovery methods.
Ambiguity searching algorithm via coordinate function constrain in radar dynamic calibration
Authors: Zhao Fang , Zhang Xiao , Yang Libin
Published: September 2019

Aiming at the difficulty of ambiguity resolution in GPS dynamic positioning, the radar calibration route is transformed into coordinate function, to compress the search space of Ambiguity Function Method (AFM). The simulation results show that this algorithm not only has the advantage of insensitivity to cycle slip, but also overcomes the shortcomings of large searching space and long searching time of AFM. It is an ambiguity searching algorithm suitable for high dynamics and high precision GPS positioning.
Analysis and Treatment of Abnormal Pressure of Shaft Seal of Small Steam Turbine
Authors: Liu Zhuan , Zhang Zhou-quan , Wang Qian , Wan Chang , Fa-sheng LIU
Published: September 2019

In the commissioning of power plant, this paper finds that the shaft seal pressure of small steam turbine does not match the shaft seal pressure of steam turbine, and the shaft seal pressure of small steam turbine is high. On the basis of on-site verification and theoretical calculation, the problem of abnormal shaft seal pressure of small steam turbines was solved by modifying the steam turbine shaft sealing point access point and increasing the small turbine shaft seal overflow device, which provided a solution for similar problems in the future.
Servo control system based on optical fiber CAN communication
Authors: Yahui Li
Published: September 2019

Aiming at the problem that the long-distance transmission of CAN bus in the servo control system is susceptible to electromagnetic interference, a servo control scheme based on optical fiber CAN bus was proposed to solve the problem of stable and reliable communication of CAN bus. Firstly, the paper introduced the architecture of the distributed servo control system and the existing problems; After that, the working principles of the twisted-pair CAN bus interface and the optical fiber CAN bus interface were analyzed; Then the servo control system and control strategy based on the optical fiber CAN bus were designed; Finally, a field experiment was carried out, and the experimental results indicated that the scheme had good real-time communication and reliability.
Research on frequency response experiment of servo valve based on LabVIEW
Authors: Xia Bensong , Xing Keli
Published: September 2019

In order to meet the testing requirements of a certain enterprise for servo valves, the test method for the dynamic performance of electro-hydraulic servo valves was designed. The programming of the servo valve frequency response in the LabVIEW framework is described in detail. The actual test shows that the test system works well and the experimental data is reliable and effective.
Design and test of mine transducer and drive circuit
Authors: Jun Gao , Yinda Zhu , Jiguan Zhang
Published: September 2019

Based on the technical requirements of the mine acoustic wave communication technology for the controllable acoustic wave signal source, the effects of the transducer structure on the output impact performance are studied, including: pre-stressing, magnetostrictive material size and the number of coil turns, etc. Then we investigated the factors affecting the output impact performance of the drive power, including: peak voltage, boost time and peak current; After optimizing the design and test verification of the transducer structure and the driving power supply, a technical solution capable of meeting the mining communication needs is developed.
Dual-motor synchronous control technology based on EtherCAT
Authors: Yan Pengxu , Yu Xiaoning
Published: September 2019

In order to solve the problem of position synchronization of two-motor coordinated control, this paper proposed a dual-motor position synchronization control system based on the industrial Real-time Ethernet——EtherCAT Technology. In this paper, the overall design scheme was put forward, and the synchronization mechanisms and algorithms of DC (distributed clock) were mainly analyzed. Experiments were carried out on the double-drive box transfer mechanism of the experimental platform, and the experimental results showed that the positions of the two motors was well synchronized, meeting the design requirements.
Opportunistic Maintenance Optimization for Transmission Bays Based on Multistate Markov Process
Authors: Xu Bo , Xu Shenzhi , Zhang Yumin
Published: September 2019

Power equipment usually goes through multiple states during the transition from normal state to the failure state. In order to consider equipment multistate property, an opportunistic maintenance optimization model based on multistate Markov process is proposed considering economic dependence within the transmission bay. This model describe equipment state transition process using the multistate Markov process. And then, opportunistic maintenance strategy between dependent power equipment in a transmission bay is studied. The transmission bay availability is derived considering opportunistic maintenance and scheduled maintenance. Finally, system operation cost is quantified. System operation cost is minimized to optimize equipment maintenance strategies. Numerical studies demonstrate validity of the proposed model.
Fitting algorithm for interferometric spectrum of fiber Fabry-Perot cavity acoustic sensors
Authors: Yu Changkun , Cheng Jin , Tian Yangmeng , Zou Xiaoping
Published: September 2019

Fiber Fabry-Perot cavity acoustic sensors have been widely used in some fields recently due to its advantages such as high sensitivity, resistance to electromagnetic interference, etc. In order to control the performance of the sensors, it is necessary to precisely adjust the cavity length. In order to obtain the cavity length efficiently and accurately, a fitting algorithm for interference spectrum is proposed in this paper. The base of the algorithm is the principle of light interference and the key of the algorithm is to find the peaks and valleys of the interference spectrum. Experimental results show that the algorithm has a high fitting degree.
Method for fitting wind turbine blade airfoil profile with function curve
Authors: Jiang Haibo , Zhao Yunpeng , Cheng Zhongqing
Published: September 2019

This paper analyzed the characteristics of a midline -thickness function, and gave the influence of the change of the constant value in the function on the change of the function graph. A method for fitting a wind turbine blade airfoil profile with a midline -thickness function curve was demonstrated by three examples, and some limitations of this method were pointed out. Studies have shown that the airfoil profile can be generated by using the midline -thickness function. The shape of the airfoil profile can also be changed in the desired direction by adjusting the constant value in the function. As a result, new airfoil profiles can be created, and the airfoil design can be improved. For existing wind turbine airfoil profiles, the midline -thickness function can be used for fitting. The main method is to adjust the constant value in the function to compare with the airfoil profile bitmap. Since the constants have a clear geometric meaning, the fitting process is relatively simple, but there are minor errors.
Matching Analysis of Ship and Marine Engineering Equipment Industry Value in Jiangsu Province
Authors: Shasha Liu , Jie Wu , Junting Zhang , Yu Liang
Published: September 2019

Through the analysis of the correlation between R&D and production links, R&D links and sales links, R&D links and profit links in the overall industry, manufacturing industry and supporting industries of ship and ocean engineering equipment in Jiangsu Province, we get the synergy between R&D and other links. It reveals the dynamic characteristics of the synergy between R&D and other links, clarifies the key development industries and key development links, providing reference for the coordinated development in the different value chains of the ship and ocean engineering equipment industry in Jiangsu Province.
Analysis of Flow Field Characteristics of Unequal Distance Fans
Authors: Zhai Shufeng , Yao Qian , Li Zongtao
Published: September 2019

This paper establishes the simulation model of the unequal-distance fan, obtains the details of the flow field when the fan works by CFD simulation method, and analyses the internal flow field characteristics of the unequal-distance fan from three aspects: streamline trace distribution, pressure distribution and velocity distribution, so as to get the working condition of the fan, which is of great significance for the design and transformation of the fan structure.
Practice and Analysis of a Flushing Method for Lubricating Oil System of Thermal Power Unit
Authors: Junfeng-Qi  , Yuzhu-Zhao  , Maosong-Wu  , Zhengfeng-Wu
Published: September 2019

Lubricating oil system is an important auxiliary system of thermal power unit. The equipment and pipes in the system may have foreign impurities in the process of manufacture, transportation and installation. In order to discharge foreign impurities from the system, it is particularly important to flush the lubricating oil before the unit is officially operated to ensure that the key components such as bearing bush, journal, are not damaged and affected in operation. This paper combines the optimization of the original flushing scheme of the lubricating oil system of a 1000MW unit in China, and introduces the optimized flushing methods and measures. By introducing the establishment of good working practice and experience feedback, it facilitates the follow-up similar work, and also provides a good guarantee for the safe and reliable operation of the unit, and brings good economic benefits.
Research on Enterprise Energy Measurement Based on Sustainable Development
Authors: ShiPing Chen
Published: September 2019

In the energy metering of enterprises, the purpose of energy saving and consumption reduction is achieved through the establishment of the information management system of energy metering instruments, the application of advanced metering and testing technology and the application of energy metering data.
Vibration Analysis and Dynamic Balance Treatment of Condensate Pump Motor of 390MW Gas Turbine Unit
Authors: Chai Baotong , Zhao Yuzhu , Wu Zhengfeng
Published: September 2019

The on-site vibration test and diagnostic analysis of the condensate pump motor vibration of a 390 MW gas turbine unit in a power plant were carried out. It is considered that the serious imbalance of the rotor of the condensate pump motor is the main cause of the vibration abnormality of the motor. The vibration anomaly is eliminated by the on-site dynamic balance test.
Research and Development of BIM Operation and Maintenance System in Nuclear Power Plant
Authors: Liang Weiqiao , Yang Junyi , Liu Xinping , Wei Jin , Zhang Dong
Published: September 2019

The BIM (Building Information Modeling) operation and maintenance management system of the nuclear power plant has been developed to cope with the security risks in the operation and maintenance process of nuclear power plant, the difficulty in querying the operation and maintenance status, the low work efficiency and the difficulty in statistical analysis of various large-scale operation and maintenance data. Practice has shown that the BIM operation and maintenance management system enhances the safety of the plant; on the other hand, the convenience of the results information query improves the professionalization, refinement and systematization of the nuclear power plant safety and operation management; in that way, the safety management efficiency of nuclear power plants will be comprehensively improved.
Study on Short-Circuit Impedance Characteristics in DN Traction Electric Lines
Authors: Liu Yang , Yin Zijian , Gao Qiang , Tian Xingjun , Yang Xiaoxuan
Published: September 2019

The fault location accuracy of traction electric lines protection device based on impedance characteristics is usually over thousands of meters. To find out the reasons that affect the accuracy of fault location, this paper studies some the key factors including rail potential, feedback current through ground and fault point impedance characteristics of traction electric lines. Then the calculation method of impedance increment and the reason of the location error are found. It is of great significance for the setting calculation and fault location error analysis of the protection system.
Smart Car Based on Open MV Vision System
Authors: Zhang Yawan
Published: September 2019

Modern society is developing rapidly, social informationization, and the degree of science and technology has become higher and higher. The development of intelligence has gradually entered people’s vision, and will eventually become a part of human life in the future. In order to facilitate people’s use, a target tracking method based on Open MV vision system is proposed. The machine vision Open MV module is used to collect image information, and through image information processing, the information is transmitted to the central control chip STM32 core control board. And the various modules that control the car work together. The method can resist the interference of illumination changes, achieve path optimization to a certain extent, and achieve real-time processing under limited computing resources. At the same time, the design is simple and the cost is low. The experimental results have been obtained through experimental tests, and the follow-up of the trolley has been successfully realized. Later, it can be used as a reference for the design of the driverless car and can also be used for the design of the smart car toy.
Research on Noise Control Technology of 10kV Dry Parallel Reactor
Authors: Sheng Hu , Xiaowen Wu , Jiwen Peng , Ling Lu , Hao Cao , Wei Chen , Tienan Li
Published: September 2019

Reactor noise is one of the main noise sources in substations. It has obvious low-frequency noise characteristics and long transmission distance, which has a great impact on the sensitive targets of the acoustical environment at the substation boundary and outside the substation. In order to solve the problem of the boundary noise exceed the emission limits caused by 10 kV dry shunt reactor in a 220kV substation, noise reduction measures using noise barrier are proposed, and the effect of noise reduction is simulated and analyzed based on SoundPLAN software. The test results show that the noise reduction measures adopted can ensure that the noise at substation boundary meets the emission limit requirements.
Causes and Countermeasures for Decrease in Denitration Efficiency and Excessive Ammonia Escape in SCR System of Coal-fired Power Plants
Authors: Qi Xiaohui
Published: September 2019

The good operation of the SCR flue gas denitration system in coal-fired power plants is of great significance to the environment. This paper introduces the denitrification efficiency drop and the ammonia escape exceeding standard in the operation process of a coal-fired power plant denitrification device. According to the actual situation of the plant equipment and the field investigation results, the problem is analyzed in depth, and the test measures for the optimization of ammonia injection are proposed. Through experiments, reducing the NOx concentration distribution of the outlet is to improve the denitration efficiency of the SCR system, at the same time reduce the ammonia escape rate of the denitration outlet, and ensure the safety, continuity and economical stable operation of the unit equipment.
Theoretical and Experimental Research on a novel adsorption refrigerator based on low temperature geoethermal water
Authors: Hu Bing
Published: September 2019

In view of the problems existing in adsorption refrigeration based on low temperature geothermal water, the adsorbent with high mass transfer performance was prepared by carbonization activation method. The specific methods are as follows: firstly, Chinese fir sawdust is immersed in calcium chloride solution, then taken out and dried, and the mixture is carbonized and activated at high temperature to form a porous activated carbon/calcium chloride composite adsorbent, and then expanded graphite is added to enhance the thermal conductivity of the composite adsorbent.The results show that: The proportion of calcium chloride in the composite adsorbent can be significantly increased by carbonization activation method, which makes the composite adsorbent have abundant microporous structure and uniform element distribution. The thermal conductivity of the composite adsorbent can be improved by adding expanded graphite.
Sea surface temperature retrieval from landsat8 thermal infrared remote sensing data in coastal waters
Authors: Fu Jiaoqi , Chen Chao , Ren Huazhong , Zhang Yuhuan , Chu Yanli
Published: September 2019

Since the launch of landsat8, high-quality surface observation data have been acquired. But the corresponding sea surface temperature (SST) products have not been seen. Moreover, the existing SST inversion algorithm do not carefully consider the effect of water vapor on the accuracy. In this study, a new method is proposed for the retrieve of SST from Landsat 8 Thermal Infrared Remote Sensing (TIRS) data based on the variation of atmospheric water vapor content. The steps are briefly described as follows: 1) constructing the SST retrieval model of thermal infrared remote sensing by using the radiation transfer equation with atmospheric profile data (air temperature and pressure); 2) retrieving SST of Zhoushan sea area, China from Landsat 8 TIRS Data; 3) evaluating the accuracy of proposed model by simulation data and AVHRR SST product. The bias and RMSE based on the simulation data are within 0.4 K. The bias and RMSE based on AVHRR SST product are 1.6063 K and 1.8507 K, respectively. The results show that the accurate SST with high spatial resolution could be obtained by using the method.
Research on Magnetic Characteristics of Small UAV for Aeromagnetic Measurement
Authors: Dai Jialong , Meng Lifei , Huang Kui , Xu Chaoqun , Yi Zhong , Xiao Qi , Liu Chaobo , Wang Bin , Zhang Chao , Zhang Shaohua , Li Na , Zhang Yanjing
Published: September 2019

UAV has the characteristics of small size, light weight, low cost, convenient assembly and maintenance, etc. It is suitable for aeromagnetic exploration, mapping, agriculture and forestry plant protection and other fields. Commercial drones, combined with aerospace magnetic measurement with its excellent platform value, can play an important role in small-scale geomagnetic surveying and magnetic anomaly detection in key areas. In the aeromagnetic measurement process of the drone, the small-scale and high-integrated hardware configuration results in a high level of near-field magnetic interference of the drone, which affects the magnetic detection effect. This paper selects a small commercial unmanned aerial vehicle for magnetic characteristics research. The static and dynamic flight magnetic tests of the UAV were carried out in the zero-magnetic laboratory, and the magnetic moment and magnetic field characteristics were analyzed. The experimental results will be used as the data basis for magnetic interference noise reduction in UAV aeromagnetic survey applications.