bluuebunny/crossref_metadata_2025 huggingface dataset:
A Systematic Framework for Maintenance Scheduling and Routing for Off-Shore Wind Farms by Minimizing Predictive Production Loss
Authors: Feng Jianshe , Cai Haoshu , Liu Zongchang , Lee Jay
Published: January 2021

Maintenance scheduling and vessel routing are critical for the off-shore wind farm to reduce maintenance costs. In this research, a systematic framework that takes the advantage of predictive analysis for off-shore wind farm maintenance optimization is sketched and the optimization results are presented. The proposed framework consists of three different functional modules - the prognostic and diagnostic (P&D) module, the wind power prediction module, and the maintenance optimization module. The P&D module predicts and diagnoses the system failures based on the operational data of the wind turbine and generates the maintenance tasks for execution. The power prediction module predicts the weather conditions and the production of the wind turbine in the next 1-3 days, which will be helpful for maintenance task prioritization and scheduling. The optimization module absorbs information from the previous two modules as input and optimizes the overall maintenance costs. Comparing with the previous research works, this framework optimizes the maintenance cost in a more challenging situation by considering the predicted remaining useful life from the P&D module and also the future weather condition from the wind power prediction module. In the proposed framework, the maintenance scheduling and the vessel routing are optimized collaboratively with the consideration of real-time production loss. The result of the proposed framework is demonstrated on an off-shore wind farm and reduced maintenance cost is reported.
Research on Music Adaptive Method Based on Dance Robots
Authors: He Suli , Liu Min , Dong Liguo
Published: January 2021

Music adaptive method, one of the important directions of dance robot research, will improve the robot's intelligence and adaptive ability, thereby greatly enriching people's growing spiritual and cultural life. From the current point of view, an overly complex adaptive method used, a large amount of computer resources will be encroached on, and the dance robot system will freeze or even crash. The dance robot is a kind of embedded device. Under the premise of saving system resources, how to make the robot do different actions according to different music and how to make it produce movements in step with the music will become a hot topic in the research of robot adaptive methods. This paper proposes a dance robot adaptive method based on music analysis. After the music signal is preprocessed, a reasonable threshold range is set to obtain music features. Through the feature and coordinate transformation, the action duration is obtained, alternative actions are selected, and action frequency is set to achieve the coordination of amplitude change and action switching. Experiments have shown that with this method used on a dance robot, the system runs smoothly featuring coordinated movement, hence a better adaptive effect.
Measurement methods of total organic carbon in seawater
Authors: Zhang Shuwei , Wang Zhaoyu , Yan Xuejiao , Wang Jing , Zhang Li , Shi Qian , Yuan Da , Ma Ran , Liu Yan
Published: January 2021

Total organic carbon (TOC) can reflect the total amount of organic matter in water. This paper introduces the common methods of measuring organic carbon, including high temperature combustion method, potassium persulfate oxidation method, spectrometry, ozone oxidation chemiluminescence method, supercritical water oxidation method and so on. At present, high temperature combustion method is the most widely used method for TOC measurement in seawater, because of its high oxidation efficiency. TOC sensor needs to be developed to realize in-situ and long-term monitoring.
Research on Two Dimensional Code Encryption Method Based on Embedded Device
Authors: Xu Wenchao , Gong Haiyun , Wang Daitao
Published: January 2021

As the carrier of information storage, the generation standard and identification method of two-dimensional code are shared. A set of unified standards used, but without corresponding encryption measures, it is difficult to ensure that the two-dimensional code information will not be attacked and tampered by criminals in the process of transmission, resulting in information security risks. With the intellectualization of embedded devices, two-dimensional code has found an increasingly wide application, but its safety issue is becoming more and more prominent. This paper proposes a two-dimensional code encryption method based on embedded devices. In this paper, AES symmetric encryption algorithm which ensures both encryption and decryption speed and security is selected to encrypt the two-dimensional code. Key expansion with the traditional AES encryption algorithm has some flaws in that once a key in one of the rounds is intercepted, the previous and the following subkeys will be calculated through fixed algorithm. Random function is used to improve the generating algorithm of expanded keys, hence enhancing the anti-attack ability of the encryption algorithm. By putting random function and g function into Cloud for operation, the speed of encryption and decoding QR code of the embedded device is increased. The test results show that the system designed in this paper can effectively hide the information contained in the QR code picture, which shows that this method ensures high security.
Performance evaluation and application of a new phase permeability improver system
Authors: Long Changjun , Xiao Jie , Zhang Bin , Li Ning , Xiu Shuzhi
Published: January 2021

A novel hydrophobically associating polymer (HHA-RPM) was synthesized by a solution polymerization method with a modified acrylamide (AM) as the main component and implanting an anionic group. The static adsorptivity of the polymer was measured by an ultraviolet visible light photometer with an adsorption amount of about 11.0 mg/g. The influence of concentration, temperature and salinity on the apparent viscosity of the polymer solution system was investigated indoorally, and the HHA-RPM system was prepared. In view of the on-site requirements for the timeliness of the phase permeability improver, an antioxidant was added to the system to evaluate the durability of the HHA-RPM system.
Failure Analysis and Research of Wing Anti-ice Pressure Release on Civil Aircraft
Authors: Wang Jian
Published: January 2021

CAS alert message ‘PSW FAIL’ shows up frequently during civil aircraft test flights. This thesis provides an in-depth study of the problem by describing the fault phenomena and analyzing the fault based on historical data, system principles, and fault tree analysis. For the AT version after IASC 2nd stage software upgrade, pressure release response is triggered on the wing anti-ice valve when unilateral throttle lever is pushed over 40 degrees with both PACKs off and both WAIVs closed. Test flight data will be analyzed and verified. With respect to the flaws of pressure release response, this study optimizes the logic of ECS IASC software by analyzing trigger mechanism, adding pressure release response pre-requisites such as both PRSOV shut and signals off, with no APR mode initiated, and not under single engine startup. The study of the thesis helps to essentially improve the software, avoiding frequent occurrence of the pressure release response, enabling an accelerated production test flight and delivery test flight of Civil aircrafts.
Comment and Analysis on Characteristics of Nano Alumina Materials in Different Dye-Sensitized Solar Cells
Authors: Lin Yu-Feng , Liu Hsin-Chieh , Lin Chia-Hui
Published: January 2021

The new light-emitting organic materials used in OLEDs[1,2] belong to a type of charge injection, and our team has conducted a series of fluorescence studies. The dye-sensitized solar cell is currently the most discussed technology. The equipment that converts light energy into electrical energy is certainly worth studying. Our research on nano porous anodic aluminum oxide (AAO) nanomaterials is consistent with related research, in which titanium dioxide acts as an electron transport layer and AAO acts as a template. When the two are combined, their new properties are due to the higher mechanical strength of Al2O3 nanotubes and the electronic conductivity of TiO2 nanorods, which will increase the surface area of the DSSC anode to absorb dyes and enhance the anode The structural strength of the membrane. Finally, using different dyes, we noticed an increase in the efficiency of using AAO.
Numerical Simulation Study on the Effects of Oil Spill Diffusion in The Qitou Sea Area
Authors: Gao Jianfeng , Mei Qiliang
Published: January 2021

A two-dimensional hydrodynamic mathematical model of the sea area near the Qitou sea area was established by using MIKE21 hydrodynamic module, and the tidal level, flow velocity and direction simulated by the hydrodynamic model were verified according to the measured data. Based on MIKE21 hydrodynamic model and particle tracking module, a mathematical model of oil spill diffusion centered on the sea area of Qitou was established, and the influence range of oil spill under six different working conditions and the time of oil spill reaching the main sensitive area near The sea area of Qitou were simulated. The analysis shows that tidal current and wind are the main factors affecting the diffusion process of oil spill in The Qitou sea. The calculation results show the influence area of oil spill 24 hours after the occurrence of the accident and the time when the oil spill reaches the main sensitive area in The sea area of Qitou, which has a certain guiding role in dealing with the offshore oil spill pollution and formulating the emergency treatment plan of oil spill accident in the sea area of Qitou.
Concept of green highway and practice of green highway in Jiangxi Province
Authors: Liu Jun , Yu Wensheng , Weng Xianjie , Han Zichuan
Published: January 2021

Ecological civilization construction has become an important part of national development. We must establish and practice the idea that clear water and green mountains are mountains of gold and silver, adhere to the basic state policy of resource conservation and environmental protection, form a green way of development and a way of life, firmly follow the path of civilized development with production development, a prosperous life and a sound ecology, and build a beautiful China. This article introduces the practice of green highway construction in Jiangxi Province from the connotation of green highway, promotion of green technology application, green construction technology and innovative management. Finally, the future development direction of green highway in Jiangxi province is prospected.
An Analysis on the Types of Formulating Association Standards for General Drawing of Highway Engineering Design for Building Transportation Strength
Authors: Zhao Wei , Mao Yufei , Zhang Dong
Published: January 2021

This paper studies the classification of association standards of the general drawings of highway engineering design through investigation and analysis and sets up the system of the association standards. The classification management of general drawing standard system is carried out through research. The ten categories of general drawing management are proposed including general design, highway alignment, subgrade, pavement, bridge and culvert, tunnel, road intersection, traffic engineering and road facilities, environmental protection and landscape design, other engineering, road construction materials.
Research on Green Comprehensive Evaluation Model of Urban Distribution Network Electric Energy Based on CRITIC-Order Relation Analysis Method Combination Weighting
Authors: Du Yang , Yang Xingang , Lei Su , Guo Lingyu , Cao Boyuan
Published: January 2021

The green evaluation of urban power distribution network is the main reference basis for power grid transformation and upgrading. Based on this, this article constructs a comprehensive evaluation index system from the four dimensions of power supply side, consumer side, platform area and related policies; To comprehensively consider the difference and relevance of indicators, this paper adopts the order relationship analysis method and the CRITIC weighting method for subjective and objective combination weighting, and uses linear weighting to score indicators; Finally, combining the four evaluation dimensions to analyze the application approach of the comprehensive evaluation model to verify the practicability of the model.
Study on Pollution Characteristics of Shale Refinery Wastewater
Authors: Yuting Fu , Changbo Li , Guozheng Zhao , Hui Liang , Shuo Wang , Hongzhu Xu
Published: January 2021

This paper studied the pollution characteristics of shale oil refinery wastewater, by using conventional analysis, infrared spectroscopy, ultraviolet spectroscopy, chromatography and mass spectrometry. The results showed that: wastewater contains high concentration of dissolved organic matter, which was poor in biological treatment. The organic structure of wastewater contains groups such as benzene ring, carbonyl group, hydroxyl group, ether group and carboxyl group. The composition of wastewater was very complex, which has phenols and oil compounds, with inorganic pollutants such as iron, calcium, magnesium, and sodium.
Development and prospect of environmental treatment and ecological restoration of closed coal mines
Authors: Qiao Guichuan , Du Song , Liu Wei , Luo Zihao , mou Zishen
Published: January 2021

The exploitation of coal mine resources has greatly contributed to China’s economic development, but it has also caused damage to the surrounding ecological environment. With the adjustment and optimization of the national energy structure, many small or unqualified mines have been closed in recent years. Thus, the environmental treatment and ecological restoration of these closed coal mines need to be carried out urgently. In this study, the causes of closed coal mines are analyzed from the perspective of macro policy. Then, the key technical difficulties of comprehensive and systematic restoration and treatment of geological and ecological problems are discussed from multiple perspectives. Finally, the successful restoration and treatment cases of closed coal mines locally and globally are showed. The findings of this study provide ideas and methods for ecological environment restoration and management of closed coal mines.
Three Types of Economic Strategies in Japanese History
Authors: Liu Jiayin
Published: January 2021

Japanese economy was ruined in the WWII, but grew quickly after this war. The strategies of Japanese government used to recover the economy are analyzed through reviewing the literature in this paper. The conclusions are as follows: after the war, Japanese government had applied various policies to help their economy to grow, although not all of them got the expected result. During 1950-1970, Japanese government carried out trade strategy, which can help Japan increase exports, learn from foreign countries, and improve their industry. From 1980s, Japanese government carried out science and technology strategy, which helped Japanese to create some improved versions of technologies based on knowledge they learned from foreigners before. And during 1985 to 1990, in order to remit the appreciation of yen (Japanese money), Japanese government applied a policy called “quantitative easing policy”, which increased the yen in circulation and thus helped yen to depreciate. The first two polices indeed boosted the economy, however the last policy had an negative effect on Japanese economy in the end. But generally speaking, these policies brought Japan to a higher economic level compared with several years before when the WWII ended.
Research on the Work Engagement of Hospitality Industry Staff from the Perspective of Tourism Management Informatization
Authors: WU Peiying , JIN Yixing , CHENG Lin , WANG Yingda
Published: January 2021

With the development of information technology, the Internet and informatization have brought huge changes in tourism management. As the pillar industry of the tourism, the hospitality industry, are facing new requirements for transformation and optimization. How to retain talents and how to make talents willing to work are two important issues that hotels need to pay attention to in practice. Through a self-report questionnaire survey of 325 employees from hospitality industry, this paper use SPSS and AMOS tools to analyze the influencing factors of performance evaluation fairness (emloyee voice) and the employees’s work engagement, and constructs the impact mechanism model of them, meanwhile aim to give some helpful suggestions on indigenous research, and can probably enrich the informatization application in tourism management and innovation.
Research on the International Development Trend of Big Data and Digital Economy and Its Reference to China
Authors: Tao ZHANG , Zai-Qun WU , Xiao-Yu ZHENG
Published: January 2021

With the wide application and development of big data, digital economy has become the innovation power of global economic growth and has an important impact on the development of global social and economic cooperation. From an international perspective, this paper analyzes the development trend and achievements of the United States, the European Union and important international organizations in the field of digital economy. On this basis, this paper analyzes the current situation and challenges of the development of China's digital economy, and puts forward suggestions and measures to promote the development of China's digital economy in view of the digital gap, value assessment, development mode, talent training.
The application of probability theory in speculative game of stock market
Authors: Liu Ya Guo
Published: January 2021

The main fact of China's stock market so far is that it is a policy market, a capital driven market and a speculative market. Value investment is scarce. This paper tries to use the method of probability theory to get rid of the fog of the market, help the majority of retail investors wake up in cognition, realize that the strong are always strong, and form their own investment style, so as to realize the stable profit from the market.
Nobiletin enhances Pirarubicin chemosensitivity of breast cancer cell MDA-MB-231 by regulating PER2
Authors: Yuan Fahu , Liao Xinghua , Zhang Tongcun
Published: January 2021

To explore the potential mechanism of nobiletin in improving the sensitivity of breast cancer MDA-MB-231 cells to Pirarubicin. MDA-MB-231 cells were randomly divided into Control group, Nobiletin group, Pirarubicin group and Nobiletin co-Pirarubicin group. CCK-8 assay was used to detect the inhibitory effect of Nobiletin co-Pirarubicin on the proliferation of MDA-MB-231 cells, and the cell cycle and apoptosis of MDA-MB-231 cells were detected by flow cytometry. The effect of nobiletin combined with Pirarubicin on the migration and repair ability of MDA-MB-231 cells was detected by scratch test. Western blotting was used to determine the effect of nobiletin co-Pirarubicin on Period2 (PER2), apoptosis-related proteins Bax and BCL-2 expression levels in MDA-MB-231 cells. The results showed that the sensitivity of MDA-MB-231 cells to Pirarubicin was enhanced by nobiletin. Compared with Pirarubicin or nobiletin alone, Pirarubicin combined with nobiletin promoted the apoptosis of MDA-MB-231 cells and the expression of apoptosis-related protein Bax, and reduced the expression of apoptosis-inhibiting protein BCL-2. The combination of nobiletin and Pirarubicin significantly inhibited the proliferation and promoted the apoptosis of MDA-MB-231 cells, which may be mediated by the enhancement of PER2 expression by nobiletin.
Progress on the application of functional dietary supplement in sports science
Authors: Jian Nitong
Published: January 2021

Functional dietary supplements are now regarded as an important factor to keep physical health, maintain exercise status and improve athletic performance. More and more sports industries are focusing on such supplements, which makes the industry develop rapidly and pay more and more attention to the research and development of different products, functions and the efficacy of health care. In this paper, the functional dietary supplements were classified and summarized, and energy supply supplements were discussed in detail: glucose and Adenosine Triphosphate; Exercise protection supplements: chondroitin sulphate, glucosamine, collagen, vitamin D and calcium; Endurance supplements: strength supplements such as protein, creatine, β-alanine, epicatechin, and taurine. The existing problems of functional dietary supplements were analysed and summarized, and the future development prospects were prospected, hoping to provide references for the development and research of new products of functional dietary supplements.
Comparison of Total Flavonoids Content in Different Bamboo Shoots and Different Parts
Authors: Xuehua Feng , Zurong Song , Jun Wang , Jie Fang
Published: January 2021

The paper determined the content of total flavonoids in different types and parts of rhizome shoot and winter bamboo shoots by UV spectrophotometry for comparison. The results showed that the bamboo shoot sheath had a higher level of total flavonoids than in the bamboo shoots, and the rhizome shoot had a higher level of total flavonoids than the winter bamboo shoots in different parts.
Application of β-glucosidase Immobilized on Chitosan microspheres in Degradation of Polydatin in Polygonum cuspidatum
Authors: Zong Wei , Liu Shan , Yun Jeonyun , Xiao Xiong , Deng Zujun , Li He
Published: January 2021

Resveratrol in Polygonum cuspidatum is a β-glycoside, which can be hydrolyzed to resveratrol by β-glucosidase. it is an efficient production process to degrade polydatin from Polygonum cuspidatum extract by immobilized β-glucosidase. It is of great significance to explore suitable immobilization conditions to improve the catalytic efficiency and reusability of β-glucosidase for polydatin degradation and cost reduction. In this paper, the recombinant Escherichia coli bgl2238, which was screened and constructed from corn soil of Heilongjiang Province in the early laboratory, was immobilized by chitosan adsorption and glutaraldehyde crosslinking. The preparation conditions and immobilization process of bgl2238 were determined by single factor method: the optimal crosslinking time was 1 h, the optimal crosslinking temperature was 20 °C, the recovery rate of enzyme activity of bgl2238 was 87 %, and the enzyme activity was 859.65 mU/g. The optimum temperature of the immobilized bgl2238 is 50 °C, which is 6 °C higher than that of the free bgl2238, and the temperature stability and pH stability are improved. After six consecutive hydrolysis of Polygonum cuspidatum, the degradation rate of polydatin is still over 70 %, which proves that the immobilized bgl2238 has good reusability. This will be helpful to evaluate the application prospect of β - glucosidase immobilized in this system and determine the best conditions for its production.
Quorum Sensing Inhibitory Activities of Oridonin in Pseudomonas Aeruginosa
Authors: Huang Jing , Li Haoming
Published: January 2021

Pseudomonas aeruginosa is an opportunistic pathogen, and it can produce cell-associated and extracellular virulence factors. Several of these virulence factors have been demonstrated to be regulated by quorum sensing (QS). Disabling QS system with anti-infective agent is considered as a potential strategy to prevent bacterial infection. Rabdosia rubescens has been used as antibacterial agents for many centuries in China. In this study, Oridonin, the major active components of Rabdosia rubescens, was tested for QS inhibition in Pseudomonas aeruginosa. QS inhibitory activity is demonstrated by reduction in pyocyanin (58.4%), rhamnolipids (64.3%), elastase (58.6%), and protease (49.1%) in Pseudomonas aeruginosa PAO1 at 125 µg/ml (MIC) concentration. Biofilm formation by Pseudomonas aeruginosa PAO1 was reduced considerably (40.3-57.7%) over control. These findings suggest that Oridonin might be a potent Quorum Sensing Inhibitor (QSI) and anti-biofilm agent in the treatment of Pseudomonas aeruginosa infections.
The study on the attitudes of people with different ages towards transgenic food
Authors: Liu Aizhu
Published: January 2021

With the rapid development of contemporary society, increasing number of people begin to pay attention to whether the food they eat are healthy enough. Under such considerable population, the traditional method of growing crops becomes inadequate to meet the needs of the population. As a consequence, scientists invent a new way to grow food called genetic modification. This paper is to investigate the attitudes of people with different ages to GM foods. In order to reach that goal, it conducts a questionnaire survey in Tianjin, China. Serving as the results, the data gathered show that a large part of population older than 40 have a skeptical attitude toward transgenic food and, on the contrary, most of the people younger than 40 hold an optimistic attitude toward the future of transgenic food. In conclusion, the development of GM foods are promising in this city.
Damage Identification of Multi-span Bridge Structure Based on the Recognition of Influence Line
Authors: Yunkai Zhang , Qingli Xie , Guohua Li , Yuntao Ye
Published: January 2021

The stress and deflection effects of the line changes before and after the bridge damage are used as indicators to evaluate the bridge damage and the initial damage site. Then a method of combining information is proposed to improve the accuracy of the damage site. Three-span continuous reinforced concrete was used in the analysis. According to the test, the effectiveness of damage identification based on the damage change of the influence line and the feasibility of the damage location method based on multi-sensory information fusion are confirmed.
Study on Mechanical Properties of Steel Fiber Rubber Recycled Brick Concrete
Authors: Chen Yanyan , Zou Chuanlong , Liang Xiaoguang , Chen Shan , Li Mingmao , Huang Weirong , Huang Rongxing
Published: January 2021

In order to study the mechanical properties of steel fiber rubber recycled brick concrete, ten groups of recycled brick concrete specimens with the strength of 15MPa were tested , one group was purely recycled brick concrete, the remaining nine groups mixed with different rations of admixture. Three groups mixed with steel fiber, another three groups mixed with rubber granules, the last three groups mixed with both steel fiber and rubber granules. These concrete specimens were tested by pressure testing machine respectively, the maximum strength is calculated by its maximum stress value. The results proved that: when adding steel fiber to recycled brick concrete can improve the strength of concrete, the higher the percentage of steel fiber was added, the more obvious the increases in strength. The recycled brick concrete mixed with rubber granules showed a reduced strength of the concrete, the higher percentage of rubber granules were added, the more significant drop in strength. When added the same percentage of both steel fiber and rubber granules, the result showed an increased strength of recycled brick concrete, as the percentage of two kinds of admixture dosage increases simultaneously, the strength increases rapidly.
Research on land use characteristics in the metropolitan TOD region
Authors: Yan Wenxiao
Published: January 2021

Taking Guangzhou as an example, the land use structure characteristics of the TOD area centered on the rail transit station are studied. The TOD area land use specificity index E is constructed, through the preliminary calculation of Guangzhou city index, using the natural break point grading method, the index according to the appropriateness of TOD area construction land is divided into TOD area significantly suitable for construction land, generally suitable construction land, non-specific construction land, generally not suitable for construction land, significantly inappropriate construction land five categories. By analyzing the various types of construction land in Guangzhou and the appropriateness of the TOD area of the rail transit site, the development strategy is provided for the development of the city guided by the TOD area of rail transit.
Dynamic load test and lateral load distribution of a modified rigid frame bridge
Authors: Yu-feng NING , Qing-cheng YANG , Wei-wei SUN , Shun-chao CHEN
Published: January 2021

In order to evaluate the stress state and working performance of a rigid frame bridge after reconstruction and extension, load test and transverse load distribution were carried out. Static load test is the test of stress at each section of main beam under the action of partial load and medium load. Dynamic load test is used to test the inherent fundamental frequency, damping ratio and impact coefficient of the bridge through pulsation test and sports car test. The results show that the first order vibration of the bridge is mainly transverse vibration from the measured modal parameters, which is consistent with the characteristics of higher pier and greater flexibility. The vibration characteristics of the bridge structure are low frequency and small damping vibration, the value of which belongs to the normal range among similar bridge structures, the overall stiffness of the bridge structure is normal, and the measured impact coefficient during the test of sports car is less than the design impact coefficient, indicating that the dynamic stiffness of the bridge meets the design and specification requirements.
High Temperature Performance of a prefabricated concrete sandwich panel
Authors: Liu Shouqian , Song Zhan
Published: January 2021

The innovative sandwich wall panel studied in this paper can be used as the load-bearing member of the structure. In addition to the traditional sandwich panel structure, the new panel system also has the characteristics of spiral stirrups along the section of the core column, 650mm column spacing, foam concrete for insulation layer and self-compacting concrete for outer layer. In addition, in order to improve the overall strength and stiffness of the panel, a unique wire system consisting of two vertical wire mesh connected by a short horizontal steel bar is adopted in the concrete layer. In order to study the mechanical properties of the new panel system at high temperature, ABAQUS simulation was carried out. The simulation results show that the new precast concrete sandwich wall system has good resistance to high temperature and still has good bearing capacity after high temperature.
Investigation of the Impact of the Guangzhou-Lechang Expressway Segment at the Pajiang River Detention Basin to Its Normal Flood Prevention Operation
Authors: Xiao-long Liao , Xian-ping Wang , Jiao Xue , Kai-Xia Yin , Yi-Xuan Zhong
Published: January 2021

Based on the existing relevant information, the paper investigates the occupation situation of the segment of the Guangzhou-Lechang expressway in the Pajiang River detention basin and analyzes the relationship of the water conservancy facility construction to the planning of the detention basin. One-dimensional and two-dimensional mathematical models are established to evaluate the construction effect on flood control in the detention basin under the normal use condition of the Pajiang River. The results show that the construction occupies 0.09% regulation and storage volume of the detention basin, which leads to the following impacts to its flood prevention operation: the starting time of the detention basin delayed 3~12 minutes, the average discharge of the Jiangkouxun section in the main river of the Beijiang River increased 12m3/s, and the average discharges of the Tiechuang-ao section of the Pajiang River and the Changbu section of the Yuantan River in the detention basin decreased 14 m³/s and 13 m³/s, respectively. Meanwhile, the highest water level of the Jiangkouxu Station and the peak discharge of the Shijiao Station remain almost the same. Therefore, as the conclusion, the engineering construction of the expressway segment only produces a minor impact on flood control of the Beijiang River. This investigation provides the technical basis for evaluation of the impact to flood prevention by highway construction for similar projects and will be useful for decision-making of the relevant planning agencies.
Research on Water Conservancy Modernization Based on Multi-index Comprehensive Evaluation
Authors: Jiahong Zhou , Lijun Liu , Yifan Chen
Published: January 2021

The modernization of water conservancy is an important part of socialist modernization. The research and analysis of the evaluation index of water conservancy modernization will help to define the direction and goal of modernization at a higher level in the future. Taking Hangzhou as an example, 41 comprehensive indexes in 7 categories were adopted as the quantitative evaluation indexes of water conservancy modernization in Hangzhou, and the comprehensive evaluation method of multiple indexes was used to analyze and calculate the level of water conservancy modernization in Hangzhou.
Effectiveness of environmental management institutions in sustainable water resources management in the upper Hanjiang River basin
Authors: Qian Ru , Hao Dong , Zongwu Li , Mengge Duan
Published: January 2021

The Han River valley plays an important strategic role in the water resources allocation system in China. A parallel hybrid approach was used in the study, using both qualitative and quantitative data collection and analysis techniques. Twenty self-administered questionnaires were sent to the heads of the environment bureaus of 17 districts (counties) and 3 cadres of the natural resources bureaus. Three in-depth interviews were conducted with the head of the water authority in the basin. Runoff, water quality and sediment load data were collected over a 17-year period and trends were analyzed using Mann-Kendall and regression analysis statistics to predict future water levels. The results show that the positive linear correlation between runoff R and sediment load is R2 = 0.1718, while the negative linear correlation between sediment load and pH value is R2 = 0.0329. According to the Mann-Kendall analysis(p > 0.05) , no statistically significant trend was found in the data. The study concluded that there was a lack of effective regular interaction and cooperation between water and environmental management at the basin level. Effective Coordination of environmental management remains key to achieving sustainable water resources management in the Han River River Basin.
Searching for Critical Slip Surface of Slope Based on Flower Pollination Algorithm
Authors: Wang Runying , Yu Keping
Published: January 2021

In order to determine the critical sliding surface of the slope, the most dangerous sliding surface was searched by flower pollination algorithm. First, the method is applied to the traditional vertical slice method for slope stability analysis. The results are very close to those of the Autobank program, indicating that the method can search the critical sliding surface and find the optimal solution. Then, the method is applied to the new horizontal slice method, and the results of the calculation examples are better than those given in the references, indicating that the application of the flower pollination algorithm to the horizontal slice method is reasonable, reliable and superior. The successful application of this method provides a new method for determining the most dangerous sliding surface of slope.
Research on the Whole Process Cost Risk Evaluation Index System of Real Estate Park
Authors: Xu Bing , Zeng Qinling
Published: January 2021

The development focus of real estate enterprises has shifted from traditional buildings to industrial park construction. After summarizing and analyzing the risk factors of the traditional construction cost, the WBS-CBS-RBS method is used to classify and identify the whole process cost of the industrial park. Finally, eight first level evaluation indexes and 37 second level evaluation indexes are established to form the whole process cost risk evaluation index system of the industrial park construction, which provides the basis for the whole process cost risk assessment of the subsequent industrial park construction.
The impact of the simple orifice schemes of the buffer device in boom refuelling system in the transient pressure of the pipeline
Authors: Dong Zhangzhi , Li Xiaogang , Hou Yanyan , Li Bin , He Yujuan
Published: January 2021

The boom refuelling system has a large refueling flow, and the refueling joint when the refueling is interrupted in an emergency will cause pressure shock and pressure pulsation. In severe cases, it will cause vibration of the pipeline system, reduce system reliability, and seriously endanger flight safety. Adding a device similar to an accumulator at the end of the pipeline where pressure shock occurs can well absorb the shock pressure. This paper uses a certain type of aircraft as a background to simulate the construction of a rigid air refueling pipeline system with a buffer device. The emphasis is on the pressure shock suppression characteristics of the buffer device. The simulation analysis of the opening parameters of the expansion cavity entrance includes the number and size of the buffer device. The impact of pressure shock performance. The results show that: the more openings and the larger the pore size, the larger the first pressure peak and the smaller the second pressure peak; while increasing the total flow area can effectively reduce the pressure shock suppression effect of the buffer device.
Tribological Behavior of Hydraulic Oils Under Different Motion Modes
Authors: Haizhen An , Li Chen , Penghou Zhen , Min Liu
Published: January 2021

In order to study the tribological properties of different hydraulic oils under different motion modes, four-ball tester and block-on-ring tester were used to optimize the test parameters and evaluate performance of commercial hydraulic oils. The results showed that the optimized test methods under the form of point and line motion modes can better evaluate the extreme pressure and anti-wear performance of hydraulic oi. There was a negatively correlation between extreme pressure and anti-wear performance; this method can provide a basis for the reasonable selection of lubricating oil in hydraulic system.
Research summary of cable channel fire extinguishing technology
Authors: Sanwei LIU , Fuyong HUANG , Liang GONG , Xiaoli DUAN , Yafeng CHAO , Jianjia DUAN , Yishi YUE
Published: January 2021

Cable channel fire is an important factor affecting the safe operation and maintenance of power cables. This paper summarizes the current research situation of fire-extinguishing technology, analyzes the fire-extinguishing technology suitable for cable channel, and proposes to use S-type aerosol fire-extinguishing technology to extinguish the fire of cable channel..
Visual recognition of robot targets in complex state based on sub-pixel Harris corner
Authors: Ying Xinyuan , Zhang Ziyou
Published: January 2021

In the field of robotics, it is always a big challenge for the visual recognition and operation of target objects in complex state, such as target objects in dead corner and surrounded by other targets. In this paper, V-REP and MATLAB are used for joint simulation to conduct experiments on the robot scene. For the target object in a complex state, the RGBD camera is used to record the image and determine the target range, and introduce sub-pixel Harris corner detection to establish the grasping surface and center point coordinates, to make the robot under complex condition can more accurately for corresponding operation.
Static Analysis and Topological Optimization of Steering Block for Mining Shuttle
Authors: Chen Hui , wang Jinlong , Zhang Xiaqi , Yuan Chengdong , Chi Zhenyu
Published: January 2021

Taking the steering block of mine shuttle car as the research object, a three-dimensional solid model of the steering block of mine shuttle car is established by SolidWorks. Based on ANSYS Workbench, the total deformation and stress of the steering block of Mine shuttle car under tension are obtained. According to the boundary conditions, the steering block is optimized by topology optimization, and the steering block is optimized by the results of topology optimization, and finally verified by static analysis. The results show that the mass of the optimized steering block is reduced by 11.7%. This study provides a reference for comprehensive performance analysis and optimization of Mine shuttle car steering block.
Summary of Research on Related Technologies of Ship Dynamic Positioning System
Authors: Wang Shuaiyang , Yang Xuanfang , Wang Zheng , Guo Liangkun
Published: January 2021

Dynamic positioning means that the ship can resist the influence of wind, wave, current and other environmental interference through its own propeller without anchoring, so as to realize the maintenance of its fixed position or expected track on the sea surface, with the advantages of not limited by water depth, rapid input or evacuation, good mobility and accurate positioning. This paper briefly introduces the components, working principle and mathematical model of the ship dynamic positioning system; On this basis, this paper summarizes the research status of the control strategy, filtering and data fusion, thrust distribution method and other related technologies of the ship dynamic positioning system at home and abroad; Finally, the development trend of the above-mentioned related technologies is discussed, so as to provide reference for the research in this field.
Control System Design Technique and Validation for A High-Resolution Mapping Satellite
Authors: Chao Chen , ShuYi Wang , Jie Liu , Tang Wu Sen
Published: January 2021

With the rapid development of the national economy, the digital city and smart city have become the development trends of China’s urbanization, proposing higher and higher requirements for earth mapping. The emergence of high-resolution mapping satellites has satisfied the demand for national economic development. Since China’s first satellite measuring scale of 1:10,000 was launched in 2019, thus GF-7 satellite has realized the arc-second attitude measurement accuracy, where the degree of stability reached 10- 5°/s. Based on the author’s multi-year research on the design of high-resolution satellite control system, the key technologies and design methods for the high-precision attitude measurement and control system were expounded, the validation results were explained, and the future direction for improving the control precision of the high-resolution mapping satellite was proposed in the end.
Research on Model Slice and Forming Method of Thin-walled Parts
Authors: Zhang Changhao , Li Hu , Yang Jianyu , Lu Huawei , Su Peng
Published: January 2021

According to the structural characteristics of thin-walled parts, a model slicing method is proposed, and its mathematical process is established. The three-dimensional transient temperature field in the process of synchronous powder feeding laser cladding is studied and verified by numerical simulation method, and the thin-walled parts formed by later experimental processing are processed by the results of numerical simulation. Using the simulation results of temperature field as the basis for optimizing the processing parameters, the forming path of thin-walled parts is programmed and optimized, and the experimental verification shows the reliability of this method.
The mental representation of sounds in speech sound disorders
Authors: Pathi Soujanya , Mondal Prakash
Published: January 2021

The objective of this study is to investigate facets of the human phonological system in an attempt to elucidate the special nature of mental representations and operations underlying some of the errors in speech sound disorders (SSDs). After examining different theories on the mental representations of sounds and their organization in SSDs, we arrive at the conclusion that the existing elucidations on the phonological representations do not suffice to explain some distinctive facets of SSDs. Here, we endorse a hypothesis in favor of representationalism but offer an alternative conceptualization of the phonological representations (PR). We argue that the PR is to be understood in terms of a phonological base that holds information about a segment’s acoustic structure, and which interacts with other levels in the speech sound system in the mind so as to produce a certain sound. We also propose that the PR is connected to an interface module which mediates interactions between the PR and the articulatory system (AS) responsible for the physical manifestation of speech sounds in real time by way of the coordination of activities of speech organs in the vocal tract. We specifically consider different stages of operations within the interface, a specialized system within the cognitive system, which can explain patterns in the SSD data that have so far remained elusive. Positioned between the PR and the AS, the interface module is the heart of the current study. The presence of an interface module is necessitated by the fact that not all errors of SSDs are explainable in terms of structural, motor or even the symbolic misrepresentations at the level of PR. The interface acts as a mediating system mapping sound representations onto articulatory instructions for the actual production of sounds. The interface module can receive, process, and share the phonological inputs with other levels within the speech sound system. We believe an interface module such as ours holds the key to explainingat leastcertain speech disarticulations in SSDs.
Understanding mindfulness outcomes: a moderated mediation analysis of high-performance work systems
Authors: Jha Sumi
Published: January 2021

The purpose of the study was to explain the possible outcomes of mindfulness. The research studied the relationship between mindfulness and employee voice behaviour, affective commitment, job satisfaction, and burnout. The research added one contextual variable, high-performance work system, as a moderator. The sample of the study was faculty members of higher education (management) schools. The sample size was 1092 faculty members. Moderated mediation analysis was used to analyse the data and understand the positive as well as the negative relationship of high-performance work system. Findings indicated the significant positive relationship of mindfulness with employee voice behaviour, affective commitment, and job satisfaction. The research found a negative relationship between mindfulness and burnout. The moderated mediation analysis revealed the significant interaction effect of high-performance work system and mindfulness on consequence variables. To conclude the author found that the mindfulness practice is important for faculty members of higher education. Further the research concluded that mindfulness may enhance employee voice behaviour, which in turn increases satisfaction and commitment and reduces burnout. Such relationship is possible under high performance work system context.