bluuebunny/crossref_metadata_2025 huggingface dataset:
Petrophysical and geochemical interpretations of well logs from the pre-Carboniferous succession in Barnicarndy 1, Canning Basin, Western Australia
Authors: Wang Liuqi , Edwards Dianne S. , Bailey Adam , Carr Lidena K. , Boreham Chris J. , Grosjean Emmanuelle , Normore Leon , Anderson Jade , Jarrett Amber J. M. , MacFarlane Susannah , Southby Chris , Carson Chris , Khider Kamal , Henson Paul , Haines Peter , Walker Mike
Published: June 2021

Barnicarndy 1 is a stratigraphic well drilled in the southern part of the Canning Basin’s Barnicarndy Graben under Geoscience Australia’s Exploring for the Future program in collaboration with the Geological Survey of Western Australia to provide stratigraphic data for this poorly understood tectonic component. The well intersects a thin Cenozoic section, Permian–Carboniferous fluvial clastics and glacial diamictites and a thick pre-Carboniferous succession (855–2585mRT) unconformably overlying Neoproterozoic metasedimentary rocks. Three informal siliciclastic intervals were defined based on core lithology, well logs, chemical and mineral compositions: the Upper Sandstone (855–1348.1mRT), Middle Interval (1348.1–2443.4mRT) and Lower Sandstone (2443.4–2585mRT). The Middle Interval was further divided into six internal zones. Both conventional methods and artificial neural network technology were applied to well logs to interpret petrophysical and elastic properties, total organic carbon (TOC) content, pyrolysis products from the cracking of organic matter (S2) and mineral compositions. Average sandstone porosity and reservoir permeability are 17.9% and 464.5mD in the Upper Sandstone and 6.75% and 10mD in the Lower Sandstone. The Middle Interval claystone has an average porosity and permeability of 4.17% and 0.006mD, and average TOC content and S2 value of 0.17wt% and 0.047mgHC/g rock, with maximum values of 0.66wt% and 0.46mgHC/g rock, respectively. Correlations of mineral compositions and petrophysical, geomechanical and organic geochemical properties of the Middle Interval have been conducted and demonstrate that these sediments are organically lean and lie within the oil and gas window.
The Bamaga Basin: a frontier play in a non-frontier location
Authors: Fischer Wolfgang S.
Published: June 2021

The undrilled, offshore Bamaga Basin (pre-Jurassic) is overlain by two previously explored sedimentary basins: Carpentaria (Jurassic–Cretaceous) and Karumba (Tertiary). In 1984, Duyken-1, the only well in the Gulf of Carpentaria, 120km southwest of the Bamaga Basin, tested the Carpentaria and Karumba successions but not the deeper Bamaga Basin, which at the time was unrecognised. 2D regional seismic data acquired in 2012, and a second infill seismic survey in 2014, confirmed the presence of a sedimentary succession in the Bamaga, probably of early–middle/late Paleozoic age, and identified an intriguing, complex structural history and large potential petroleum traps. Basin modelling in the centre of the Bamaga Basin where the sedimentary section is deepest shows that the sediments are mature for petroleum generation with the hydrocarbon phase being either oil or gas, although gas is more likely, especially below 2000m. Analysis of the available data indicates that in the oil generation zone there are six targets with the potential to hold prospective resources (3U) of more than 250 million stock barrels (MMstb) of oil each, the largest of which could hold as much as 663 MMstb of oil. In the gas generation zone, there are nine targets with the potential to hold prospective resources (3U) of 1 trillion cubic feet (Tcf) or more gas each, the largest of which could hold as much as 2.5 Tcf gas. The water depth (60m) and closeness to shore (150km) make it operationally and commercially attractive.
Sample preparation for rock wettability studies via atomic force microscopy
Authors: Mitiurev Nikolai A. , Verrall Michael , Ivanova Anastasia A. , Keshavarz Alireza , Iglauer Stefan
Published: June 2021

The wettability of a reservoir rock is one of the most essential parameters in oil and gas recovery applications and gas storage schemes. However, bulk techniques, which are commonly used to analyse rock wettability, for example the United States Bureau of Mines test, are not sensitive enough to probe mixed-wettability scenarios. Furthermore, these measurements are conducted at millimetre–centimetre scale, while wettability is determined at the atomic scale, and some rocks (e.g. shale) have a very fine structure even at nanoscale. Additionally, in the case of shale rocks, standard wettability measurements cannot be applied due to their extremely low permeability. To overcome these limitations, wettability can be directly measured at the nanoscale with advanced analytical methods, such as scanning electron microscopy (SEM) and atomic force microscopy (AFM). While such techniques are well-established in various disciplines, there exists no standard procedure for rock wettability analysis at nanoscale. Thus, this study elaborates on the optimal methods that can be used for the preparation of an AFM-cantilever-rock grain sample, with which the rock wettability can be measured at atomic scale. Therefore, this work aids in the wider-scale implementation of AFM as a rock wettability measurement tool.
Solar driven produced water treatment for beneficial uses
Authors: Gunness Ralph , Wee Hensley , Lee Ronald , Nguyen Luong N. , Nghiem Long D.
Published: June 2021

This study evaluates the feasibility of an emerging technology – a concentrated solar multi-effect distiller (CSMED) – to supply high quality water for beneficial use at Eromanga, which is located in a remote and dry region of Australia. Produced water from the Kenmore oil field is the only reliable water source at Eromanga and has been approved for livestock watering. The process utilises concentrated solar technology to drive a multi-effect distiller, making the process ideal for the Australian outback. Historical water parameters of the produced water were assessed against the water guidelines for irrigation, livestock watering, municipal and potable use. The proposed treatment will further improve key water quality parameters to exceed guideline requirements for unrestricted water uses mentioned above. The CSMED produces a high-quality distillate (i.e. treated water) free of all mineral salts that can be mixed with the produced water to increase the final product water volume. An Excel based model was developed to determine suitable blending ratios while maintaining the water quality for each beneficial use. For production of livestock watering and potable use, a blending ratio (of at least 19% v/v) between the CSMED distillate and produced water can be applied, significantly increasing the final water volume. The Excel based model could also indicate chemical addition for adjustment of sodium absorption ratio in the case of irrigation application. The brine from the CSMED can potentially be used to prepare drilling mud for oil field operation. An on-site performance study of the CSMED system has been planned to validate these results.
Otolith chemistry delineates the influence of natal origin, dispersal and flow on the population dynamics of golden perch (
Authors: Zampatti Brenton P. , Leigh Sandra J. , Wilson Phillipa J. , Crook David A. , Gillanders Bronwyn M. , Maas Roland , Macdonald Jed I. , Woodhead Jon
Published: June 2021

For riverine fishes threatened by fragmentation and flow modification, effective management requires an understanding of when and where key life history processes (spawning, recruitment and movement) take place. The structural and chemical properties of otoliths provide a unique means to recount a fish’s life in time and space. We investigated the age structure of the migratory, pelagic-spawning golden perch (Macquaria ambigua) in the Murray River, Australia, and used water and otolith 87Sr/86Sr ratios to delineate the natal origin and movement of fish from discrete cohorts. Water 87Sr/86Sr was distinct among the Darling River (a major tributary) and lower and mid-Murray River. Otolith chemistry revealed golden perch collected in the lower Murray River were progeny of spawning in either the Murray or Darling rivers, during years characterised by within-channel rises in flow, or in both rivers in a year of overbank flooding. Movement of juvenile fish from the Darling River substantially influenced population structure in the lower Murray River, whereby post-flood population growth was largely due to the immigration of age-1+ fish. This study demonstrates the potential importance of tributary recruitment sources, dispersal and connectivity on main-stem population dynamics and the utility of otolith chemistry for spatially reconciling population structure and the life histories of freshwater fishes.
Autophagy deficiency modulates microglial lipid homeostasis and aggravates tau pathology and spreading
Authors: Xu Yin , Propson Nicholas E. , Du Shuqi , Xiong Wen , Zheng Hui
Published: June 2021

Significance

Neurofibrillary tangles composed of misfolded and aggregated tau protein are degraded by the autophagy–lysosomal pathway. Microglia play a central role in immune surveillance and neuroinflammation. Here, we reveal that microglial autophagy critically controls microglial metabolic and immune status and also modulates neuronal tau pathology. Autophagy deficiency induces lipid droplet formation and heightened immune response, and these phenotypes can be rescued by activating the lipid efflux system, thus establishing a mechanistic link between lipid accumulation and neuroinflammation. The development of neurofibrillary tangles closely correlates with dementia in Alzheimer’s disease, and our studies provide support that autophagy augmentation may provide therapeutic benefit through targeting both immune cell function and tau pathology.
More than “Fake News”?
Authors: Rossini Patrícia , Stromer-Galley Jennifer , Korsunska Ania
Published: June 2021

While the debate around the prevalence and potential effects of fake news has received
considerable scholarly attention, less research has focused on how political elites and pundits weaponized fake
news to delegitimize the media. In this study, we examine the rhetoric in 2020 U.S. presidential primary candidates
Facebook advertisements. Our analysis suggests that Republican and Democratic candidates alike attack and demean the news media on
several themes, including castigating them for malicious gatekeeping, for being out of touch with the views of the public, and for
being a bully. Only Trump routinely attacks the news media for trafficking in falsehoods and for colluding with other interests to
attack his candidacy. Our findings highlight the ways that candidates instrumentalize the news media for their own rhetorical
purposes; further constructing the news media as harmful to democracy.
Transient thermal fracture analysis of ferroelectric ceramics under electromechanical loading
Authors: Khatib Omar El , Kuna Meinhard , Kozinov Sergey
Published: June 2021

During their applications, ferroelectric devices are subjected not only to electromechanical loading but also to thermal fields, inducing additional stresses and impairing their functionality. Additionally, internal heat generation can occur by the dissipation of the inelastic work resulting from ferroelectric hysteresis. Moreover, at extreme electromechanical field concentrations like cracks, ferroelectric devices may fail by brittle fracture or fatigue. In the present study, the thermal effects on the fracture behavior of ferroelectric ceramics are investigated. The well-established micromechanical material model for ferroelectric domain switching is enhanced to represent the fully coupled thermo-electro-mechanical behavior. The coupling considers the pyroelectric and thermal strains effects. The internal heat production, which leads to transient temperature fields, is taken into account, as well as the temperature dependency of material parameters. The thermo-electro-mechanical fields at the crack tip are analyzed using a boundary layer approach for small-scale switching conditions. A fully transient heat conduction problem is considered, emphasizing the effect of the driving frequencies on heat generation. The configurational forces concept combined with the thermo-electro-mechanical extension of the J-integral are used to analyze the impact of the different factors on the crack driving energy.
Mexico’s electricity grid and fuel mix: implications of a fifteen-year planning horizon on emissions and air quality
Authors: McDonald-Buller Elena C , McGaughey Gary R , Shah Tejas , Grant John , Kimura Yosuke , Yarwood Greg
Published: June 2021

Energy reform that required amendments to the Mexican Constitution in 2013 and implementing legislation aimed to increase the efficiency, economic competitiveness, and decarbonization of Mexico’s electricity sector. Emissions inventories were developed for the 2016 base year and a capacity development pathway established by Mexico over a 15-year planning horizon to 2031. Between 2016 and 2031, steep declines in generation from fuel oil-fired thermoelectric, turbogas, and coal plants in favor of a buildout of natural gas combined cycle and clean energy technologies were predicted to drive reductions in emissions of sulfur dioxide (SO2), fine particulate matter (PM2.5), carbon dioxide (CO2) and nitrogen oxides (NO
x
) of 68%, 61%, 13% and 7%, respectively, with an increase in carbon monoxide (CO) of 4%. Retirement of fuel oil-fired thermoelectric and coal generation contributed to substantial reductions in 24 h average PM2.5 concentrations in Mexican and U.S. border states even with rising demand. In contrast, little change in maximum daily average eight-hour ozone concentrations was predicted with expansion of natural gas combined cycle generation, which is a source of NO
x
and CO. Mexico’s electricity sector planning process has been highly dynamic since the reform. Insights indicate how changes in national strategies could affect emissions and air quality outcomes.
Physical and Mechanical Properties of Foamed Mixture Lightweight Soil Doped With Bauxite Tailings Slurry
Authors: Ou Xiaoduo , Lyu Zhengfan , Bai Lu , Jiang Jie , Qin Jinxi , Huang Zhongzheng
Published: June 2021

In order to make better use of the BTs slurry with high water content stored in tailings ponds by wet method, foamed mixture lightweight soil (FMLSB) at four wet density were prepared using dry BTs and BTs slurry with different water contents. Their wet density, fluidity, unconfined compressive strength and water absorption were tested through indoor test, and the experimental results were analyzed by microstructure analysis. The results show that the performance of FMLSB improves as the wet density and water content of BTs slurry increase. FMLSB prepared by BTs slurry with 60% water content is poorly fluidity. That means at lower wet density due to the connected internal pores, its strength is significantly reduced and water absorption is significantly increased compared to the dry BTs group. However, with the increase of wet density, the above adverse effects of FMLSB caused by BTs slurry with low water content will decrease; and with the increase in water content of BTs slurry, its internal pore structure is significantly improved, the same as its unconfined compressive strength. When the water content is 100%, its performance is no different from that of dry BTs group. With the increase of wet density, the C-S-H produced by hydration reaction of FMLSB increases, forming a dense skeleton structure together with BTs particles and the unconfined compressive strength increases exponentially. The research results can provide a scientific basis for the direct utilization of high water content BTs slurry in tailings pond.
Risk Assessment of Knowledge Transfer in Green Building Based on ISM-MICMAC
Authors: Li Yuxuan , Guo Mingzhe
Published: June 2021

Green buildings have made a significant contribution to low-carbon and energy-saving. However, green construction projects will face greater risks than traditional construction projects due to their high cost and complex technology. Having important information or knowledge can help the project organization to stifle the risk at the source. This paper intends to improve the efficiency and effectiveness of knowledge transfer by studying the risk assessment in the process of knowledge transfer between project organizations, thereby helping to reduce the risk of green building projects. This paper first explores the influencing factors of knowledge transfer and the interrelationship between the influencing factors by analyzing the existing literature; then uses ISM method and the MICMAC analysis method, to sort out the order and hierarchy of the influencing factors in knowledge transfer, and analyze at the same time their forces of driving and dependences. Then author proposes countermeasures to the risk of knowledge transfer between project organizations. The results show that the two types of risks, low network connection strength and lack of transfer mechanisms, have a greater impact on knowledge transfer, but they are easy to manage. Therefore, construction project managers should identify these factors first and take certain measures to avoid these risks.
Effect of cavity structure on the saving up and dissipation of moisture in loess soil
Authors: Bo Tang , Baowen Yan
Published: June 2021

Technique of loess cavity structure is a kind of technology which can increase the seepage volume of rainfall water and prolong the storage time of water in the soil, but popularization and application of the technology needs theoretical support. This paper uses the method of combining indoor experiment to study the laws of water storage and evaporation dissipation in the loess soil with cavity structure under heavy rain. Results show that, vertical movement of moisture in the soil profile shows as hierarchy, and the cavity layer is the high water-holding-capacity zone; presence of the cavity structure retains more water in the soil body, reduces or prevents the water leakage to the deeper soil, and increases the water storage capacity of the loess soil by 4.7%; cavity structure can reduce the soil evaporation of 12.6%, and significantly inhibits soil evaporation. The study confirms the remarkable function of seepage improved and anti-evaporation of loess cavity structure technology, thus build a solid theoretical basis for the popularization and utilization of it.
Research on The Effectiveness of Trajectory Similarity Measurement Algorithm
Authors: Wu Yanfu
Published: June 2021

Under the background of big data era, massive trajectory data is constantly generated, which contains great value. The analysis and mining of spatiotemporal trajectory data is a research hotspot of spatial data, including trajectory retrieval, trajectory classification etc. In the process of analysis and mining, the similarity measurement between different trajectories is a key problem. Considering the amount of data, computational complexity, noise and other factors, different metrics need to be selected in different situations. In order to understand the performance of different similarity measurement algorithms, this paper selects the Longest Common Sub-Sequence Algorithm (LCSS), Fréchet Distance Algorithm and One Way Distance Algorithm (OWD) among the three kinds of trajectory similarity measurement algorithms and they were used for comparison. Experimental results show that LCSS algorithm can effectively resist the interference of noise points, Fréchet Distance Algorithm has strong robustness, and OWD Algorithm has low time complexity and short execution time.
Development of Intelligent Operation Platform for GIS Combiner Installation
Authors: Jianjun Fang , Zhaoqing Jiang , Yanping Li , Yang Han
Published: June 2021

In order to improve the installation efficiency of GIS combined electrical apparatus and reduce the installation cost, the intelligent operation platform for GIS installation is developed in this paper. The platform adopts the concept of functional modular design, can replace the modular manipulator according to the different types of installation, and is easy to disassemble and assemble. The application of accurate installation and one-time positioning platform can effectively reduce the dependence on large lifting equipment such as cranes and scrapers, avoid the occurrence of bumps and damage to insulation during installation, and improve the installation quality of equipment. Effectively prevent equipment from the defects caused by engineering construction, and ensure power grid operation safety.
Study on the hydration of hard and brittle mudstone and its influence on the wellbore stability
Authors: Chang Chunlai , Cui Jielei , Li Wen , Sun Yubo , Tao Fu , Zhang Huijun
Published: June 2021

The instability of hard and brittle mudstone wellbore in the Xujiahe Formation in the Western Sichuan Depression is widespread, which has led to accidents such as sticking and collapse. In this paper, the Xujiahe Formation in the Western Sichuan Depression is taken as the research object, and the method of indoor experiment and theoretical simulation is used to study the instability phenomenon of the wellbore. The following points of knowledge have been obtained: The clay minerals in the mudstones of the Xujiahe Formation in the Western Sichuan Depression are mainly illite and chlorite (content>90%), with a small amount of illite/montmorillonite mixed layer, and the pore throat radius is between 14.56nm-24.47nm, belonging to the mesoporous type; After the mudstone hydrates, its compressive strength, cohesion, elastic modulus, and tensile strength will continue to decrease with the increase of water, while the Poisson’s ratio will continue to rise; The relationship between the dry core and the wet core can be used to correct the acoustic velocity of the collapsed mudstone section; the nature of the wellbore instability is that the liquid pressure in the wellbore is less than the formation pressure, and the formation pressure exceeds the rock strength, which leads to instability. We use the borehole expansion rate to realize the evaluation of wellbore stability. The research results have guiding significance for the evaluation of the stability of the hard and brittle mudstone wellbore of the Xujiahe Formation in the Western Sichuan Depression, and provide technical support for the next step of drilling safety.
Finite Element Analysis of Prefabricated Concrete Box Structure System on OpenSees software
Authors: Zhang Xiaomeng , Wang Qiaji , Ren Qingying , Liu Wenting , Ding Weilun
Published: June 2021

This paper presents a new type of prefabricated concrete structure system and the corresponding shear wall structure. The finite element analysis of the prefabricated wall base on OpenSees is carried out to analyze its mechanical properties. The rationality and correctness of the finite element analysis are obtained by comparing it with the test hysteresis curve.
Study on land subsidence law of shield tunnel overlying karst
Authors: Kejin Li , Xiudong Li , Jun Wang , LiXun
Published: June 2021

In the process of tunnel construction, underground karst is one of the main causes of ground collapse accidents. Using the GTS/NX finite element software, the numerical analysis of karst with different shapes and locations is carried out, and the law of surface subsidence caused by the karst overlay on the tunnel is obtained, which provides the basis for the deformation of the stratum where the karst cave is located, the prediction of accident, the risk assessment and the formulation of the treatment scheme.
Study on the upsizing of container ships based on VAR model
Authors: Deng Yang Cheng
Published: June 2021

In this paper, the large-scale container, and the relationship between the world economic pattern and the analyses, the first analysis of container development history and the influence factors of the development of the economic situation of the world in recent years were reviewed, and then using VAR model for the world economy carries on the quantitative analysis and the container ship large-scale development, It has been concluded that the growth of the world economy has contributed to the large-scale production of container ships, and this effect will gradually turn negative and eventually fluctuate up and down to zero. The research results can be used as a guide for shipping enterprises to select and build ships and to study the large-scale container.
Seismic Evaluation Method of UHV Transformers for Soil-structure Interaction
Authors: Zhu Zhubing , Cheng Yongfeng , Lu Zhicheng , Wang Haibo , Xue Yaodong , Liu Zhenlin , Zhang Shujun
Published: June 2021

China is an earthquake-prone country. In recent years, Wenchuan earthquake and other earthquakes have caused serious damage to power facilities. As the most important electrical equipment in UHV substations, transformers are facing great threat of earthquake disasters. Currently, seismic evaluation of UHV transformers does not consider soil-structure interaction, which is not conducive to fine seismic design and evaluation of UHV transformers. Based on the structural features of the UHV transformer equipment, the seismic evaluation method of the UHV transformer with soil-structure interaction is proposed in this paper, which provides a basis for the seismic performance evaluation of the UHV transformer.
Research on Critical Success Factors of Utility Tunnel Project Based on Grounded Theory and DEMATEL
Authors: Yu Qi , Liu Yisheng
Published: June 2021

The success of the utility tunnel project depends on many influencing factors. Establishing a complete conceptual model and identifying the critical success factors can provide effective scientific support for the development of the utility tunnel project. Based on a large number of case data, grounded theory is used to carry out multi-level decoding, to identify the success factors of the utility tunnel project, and a model of ‘consciousness orientation-objective conditions-internal driving factors’is constructed. The DEMATEL analysis model is used to calculate the Influence Degree, Influenced Degree, Center Degree, Cause Degree of each factor. Combining the quadrant diagram method, we finally get four critical success factors of professional technology maturity and development, government support, financial guarantee and pipeline entrance mechanism. At the same time, corresponding countermeasures and suggestions are put forward to promote the development of utility tunnel.
Research on civil engineering project team management under adverse conditions
Authors: Leilei Liu , Xu Ren , Liangsen Li
Published: June 2021

Under the background of COVID-19 global spread, engineering project management is facing new difficulties and challenges. Because of the urgency and temporary uncertainty of civil engineering projects, it is more likely to be affected by environmental stimulation, which will affect the cost, quality and progress of the engineering project. How to maintain the stability of the project management team and improve the project performance under the adverse conditions is a new topic in the research of engineering management. Based on the Conservation of resources theory, the theoretical model of team learning in engineering projects under the background of epidemic situation is explored and verified, which can influence project performance by enhancing team resilience, and the moderating effect of collectivism orientation is found. Finally, the management suggestions of the project team are put forward under the adverse situation such as the impact of epidemic situation.
Research on identification and monitoring method of bolt connection loosening based on piezoresistive effect
Authors: Xuezhi Liu
Published: June 2021

Bolted connection is commonly used in the joint connection of engineering structures, and its connection reliability plays an important role in ensuring the service performance of engineering structures. In complex service environment, bolt connection is easy to loose. In order to identify and monitor bolt connection looseness, a bolt looseness monitoring device based on piezoresistive effect is designed and manufactured in this paper. The feasibility of the device is verified through flange bolt looseness identification test. The results show that the monitoring device can effectively identify the minor bolt loosening damage, and the identification results have good stability, and the bolt loosening can be deduced based on the variation of the conductance value. The bolting connection loosening monitoring method based on piezoresistivity effect proposed in this paper can provide a reference for the identification and monitoring of bolt loosening.
Experimental Research on Crack Resistance of Fiber Asphalt Mixture in Cold Area
Authors: Peng Bo , Liu Shuai , Li Wenying , Peng Jingwen , Li Yilang , Wang Zhensheng
Published: June 2021

The asphalt mixture’s anticracking performance is reduced to solve the problem that the asphalt pavement in the cold area is affected by the continuous and large temperature difference, and the damage features of the fiber asphalt mixture are not clear under the action of large temperature difference cycle fatigue. This article first determines the large temperature difference interval as A, B, C and uses ABAQUS to perform mechanics on the pavement structure in different large temperature difference intervals response analysis.
Study on Evaluation Technology of Regional Grouting Treatment Effect in Limestone Aquifer of Coal Seam Floor in North China Type Coalfield Based on Two-roadway Parallel Electrical Method
Authors: Liyun Ding
Published: June 2021

In recent years, the regional grouting treatment technology for limestone aquifers of coal seam floor in North China type coalfield has been developed significantly. However, the detection and evaluation of water inrush risk(or treatment effect) after grouting for limestone aquifers has not yet formed a complete technical system. In view of the high cost and low amount of information of traditional grouting evaluation methods(such as water pressure test method, borehole television method, drilling core method, etc.), it is proposed to collect geoelectric data by two-roadways parallel electricity method, to process geoelectric data by the whole space three-dimensional resistivity inversion technology and to draw a three-dimensional resistivity distribution diagram. Combined with the geological structure, hydrogeological characteristics and grouting information of the detection area, the effect of grouting treatment in limestone aquifer of coal seam floor can be evaluated. This technology was applied to the detection and evaluation of the grouting treatment effectiveness to the L8 limestone aquifer of the 2-1 coal seam floor of the 11291 working face in Zhaogu No.1 Coal Mine, which effectively guided the safe production of the working face and achieved good practical effects.
Prefabricated House Precast Part Project Scheduling Optimization Problem Based on Network Planning
Authors: Ma Tian , Liu Yisheng
Published: June 2021

Project scheduling has been the core of project management, whose largest characteristics are the limitation of resources and the diversity of activity modes. And the prefabricated building has become the most potential building form due to the promotion of policies and its own unique advantages. However, the unreasonable project scheduling might cause some problems, such as resource waste problem. This study established the mathematical model for multi-mode resource constrained project scheduling problem on Prefabricated house precast parts project, which realized the comprehensive optimization of time and cost under the condition of satisfying the constraints of logical relation and resource. And then the problem was solved by Cplex in Python, the optimized scheduling scheme was also obtained. It might provide reliable basis for project management.
The construction technology and simulation analysis of a cable-stayed arch composite bridge
Authors: Chen Zhou , Xu Haocheng , Lu Hanwen , Chen Zepeng , Lin Hongxin , Wu Xi
Published: June 2021

In order to explore the changes of mechanical properties of cable-stayed arch composite bridge in different construction stages, this paper takes a 136m tensed-string arch bridge as the engineering background, briefly describes the construction steps of grid lifting, and adopts Madis/Civil finite element analysis software for modeling. The actual construction process of the arch bridge is simulated by classifying different construction stages. The static and dynamic mechanical properties and stability of arch Bridges are studied. Through research and analysis, the main conclusions are drawn that the cables of the tensioned arch bridge bear part of the load of the original arch rib and girder.
Shaking table test on multi-dimensional seismic response of structure and nuclear power equipment coupled system
Authors: Li Binbin , Xu Weifeng , Wang Sheliang , Liu Bo , Liu Yang , Zhao Qingyun , He Lu
Published: June 2021

Structure and nuclear power equipment coupled system in nuclear power plant has complex dynamic interaction under seismic action. In order to study the seismic response of coupled system and assess seismic capacity of nuclear power equipment, shaking table test on coupled system by multi-dimensional seismic action was carried out. The natural frequency and damping ratio of the structure and nuclear power equipment were measured by two dynamic characteristic tests before and after the test. Furthermore, the test also included five operating basis earthquakes and one safe shutdown earthquake by using the artificial seismic waves as seismic inputs. The test results show that the dynamic amplification effect of the coupled system is obvious, and acceleration amplification factor of the equipment in the coupled system is about two times of the equipment directly connected to the shaking table in the X direction, between one and two times in the Y and Z direction. Compared with the structure, the dynamic response of the equipment in the coupled system also has a certain degree of amplification effect. In addition, the dynamic characteristics of structure and equipment change little. The equipment works well under all the test conditions, meeting the seismic requirements.
Optimal control model and strategy of flexible load participating in distribution network
Authors: Liu LiBing , Sun ChaoLiang , Liu YongGuang , Wu ChenKai , Li Jin , Liu MingMei
Published: June 2021

The double carbon target puts forward higher requirements for end load interaction, user-side electric vehicles, air conditioners and other resources have high elastic characteristics. Their value as schedulable resources has not been fully realized, the interaction ratio is insufficient. Therefore, on the premise of ensuring user satisfaction, the elastic load control technology under load aggregator mode is used to smooth the load fluctuation of distribution network. IEEE33 node distribution system is simulated and user satisfaction model is established. The simulation results show that when the user satisfaction is greater than 80%, the elastic load can better fit the operation control value, and the average error is less than 5%, which can meet the application requirements.
Azo Dye Decolorizaiton by Consortium HR under High Temperature and Salinity
Authors: Li Keyuan , Lou Yifan , Han Lu , Wang Chongyang
Published: June 2021

Azo dye is a kind of most commonly used dyes in related industries. As the discharge from azo dye related industries is commonly found with high salinity and temperature, halo-thermophlic microbes able to decolorize azo dyes are required. Consortium HR enriched under 5% salinity and 50°C in this study was mainly composed of Ueribacillus (70.4%), Tepidimicrobium (11.7%) and Clostridium (10.4%). The influence of salinity (1% to 10%) and pH (6 to 10) on the decolorization process were further measured. Meanwhile, consortium HR was identified with ability to decolorize several kinds of azo dyes and the phytotoxicity of the metabolic intermediates was decreased with the incubation time. All the results indicate that consortium HR has a good potential in the decolorization of azo dyes in hypersaline, high temperature and week alkaline conditions.
Research on Energy Consumption Prediction Based on Machine Learning
Authors: Liu Ren , Wang Zhonghang , Chen Haihong , Yang Jie
Published: June 2021

Energy conservation and emission reduction is an important part of enterprise management. Energy costs directly affect the economic benefits of enterprises. Energy control of industrial air conditioning has long been the focus of the attention of enterprises. At present, enterprises often adopt fixed pre-cooling and pre-heating time for air conditioning start-up strategy, and there is no unified and scientific standard. By collecting and cleaning the historical data (climate, capacity) of air conditioning operation of enterprises, this paper establishes a scientific model of air conditioning energy consumption and a prediction model of air conditioning starting time. In addition, the theory and technology proposed in this paper are applied in practice to design and implement the air-conditioning energy control system of smart factory, and to predict the starting time of the air-conditioning in the production workshop of enterprises. The results show that the system can help enterprises achieve the goal of intelligent energy management and control.
Application of on Line Chemical Cleaning for Stainless Steel Tube Condenser in a Power Plant
Authors: Yao Li , Fengyuan He , Fei Wang , Chengming Liu
Published: June 2021

According to the characteristics of stainless steel material and scale composition of condenser in a power plant, nitric acid was used as cleaning medium, and corrosion inhibitor was added to inhibit the corrosion of nitric acid on stainless steel. On line chemical cleaning was carried out on the condenser without shutdown. The scale removal efficiency and corrosion rate met the requirements of DL/T957-2017, and the terminal difference of condenser recovered to the optimal value after cleaning.
Research on elevator passenger fall detection based on machine vision
Authors: Liu Shaofeng , An Ziliang , Wang Ning , Bai Dingsong , Yu Xintong
Published: June 2021

Aiming at the problem that the current elevator monitoring system cannot detect the accidental fall of passengers, this paper proposes a fall detection method based on machine vision and multi-feature fusion. First, moving targets were extracted by ViBe algorithm, and then the human body was marked with an external rectangle. Three characteristic parameters, namely the aspect ratio, effective area ratio and centroid acceleration of the human body, were calculated. At last, thresholds were set and SVM classification training was conducted to judge whether there was a fall event. Experimental results show that the algorithm has high accuracy and good stability. It can effectively reduce the injury caused by the elderly falling down in the elevator.
Research on solving strategy of structural reliability index based on probabilistic interval hybrid model
Authors: Wu Xiaoxiang
Published: June 2021

In this paper, a hybrid model is established in which the randomness of probabilistic parameters coexists with the uncertainty of interval parameters. Based on the reliability theory, the evaluation criteria of structural reliability under the hybrid model were proposed, and the two-layer cycle method and direct iterative algorithm were derived to calculate the structural reliability index. The correctness and effectiveness of the model and algorithm are verified by examples of a cantilever beam and a three-story frame structure. The hybrid model combines the probabilistic model with the interval model effectively and has practical significance for the engineering application of reliability theory.
Study on velocity field analysis and back-mixing of fluid in reactor based by simulation
Authors: Cheng Lei , Li Miao , Zhao Xinyu
Published: June 2021

During the operation of the reactor, the degree of back mixing directly reflects the concentration distribution, temperature distribution, reaction process of the fluid in the reactor, and so on, thereby affecting the practical value of the reactor. Therefore, this article uses computer simulation to analyze the influence of inlet flow rate on the degree of back mixing. It can provide data support for the preparation of organic semiconductor materials under different reaction conditions. The research results show that when the inlet flow velocity reaches 0.3 m/s, the stirring effect of the fluid weakens, the jetting effect of the inlet pipe is dominant, and the model parameters are the largest.
Research of Microbial-gel Combined Flooding Technology of Ba19 Block in Baolige Oilfield
Authors: Qiu Liangliang
Published: June 2021

Bal9 fault block is a medium-high temperature (58°C) reservoir in Baolige Oilfield. The crude oil is characterized by poor physical properties which has high wax and high gum content. The oil-water viscosity ratio is high and this leads to a low water flooding efficiency. The reservoir heterogeneity is high and the contradictions between layers are prominent. According to the characteristics of the oilfield, a microbial-gel combined flooding technology with the microbial flooding as the main body and the gel flooding as the auxiliary is developed to improve the overall development effect of the oilfield water flooding. Microorganism can improve the physical properties of crude oil, and appropriate gel flooding should be carried out to enlarge the sweep volume of microorganism work and improve the effect of microbial-gel combined flooding. By continuous application of this technology in Baolige Oilfield, the concentration of microorganisms is maintained at about 106 a/ml, and the whole microbial field is formed. The average annual reduction rate of crude oil is 48.1%. The microbial-gel combined flooding technology is verified to increase the recovery factor by 9.5%. Since the combined flooding was carried out in 2010, the recoverable reserves of the Ba19 block increased by 630,600 tons.
Wind speed time series forecasting method in wind farm based on EEMD
Authors: Dongyang Yu , Fengchang Sun , Xiaochuan Deng , Zheng Wang , Jiahua Wu , Zhichao Zhang
Published: June 2021

The article described the relevant knowledge of wind speed prediction and the verification method of the forecast. First, the characteristics of wind speed are general analyzed. Through the form of wind, speed frequency of wind, shear speed and turbulence characteristics of wind, it was found that the wind speed had instability and non-linear characteristics. By analysing the basic principles of the three methods included the time series, neural network method and empirical mode decomposition, the wind speed time series prediction method was proposed. On the basis of this method, it was applied to a raw wind factory speed time series and simulated reality by Matlab. Compared the predictive conclusion with original data, it gained a higher accuracy and verified the efficiency of the method.
Research on the application of GIS technology in the preparation of village planning--Take Feng Sheng Village as an example
Authors: Hao Song
Published: June 2021

Hubei Province is gradually carrying out the preparation of five levels and three types of territorial spatial planning, to scientifically layout construction space, agricultural space and ecological space, and strengthen the guiding and constraining role of territorial spatial planning for all planning. At the same time, in order to promote the construction of beautiful countryside and rural revitalization, the preparation of village planning in Hubei Province is also in progress; according to the five levels and three categories of territorial spatial planning, village planning belongs to the township-level detailed planning category, and the conventional village planning can no longer meet the requirements of territorial spatial planning, so the ecological space, agricultural space and construction space in village planning should be adjusted and whitened with the help of GIS technology. Therefore, the GIS technology should be used for landuse adjustment, white space delineation, spatial control and comprehensive improvement of the national land space.
Codoping of phosphorus and nickel enhance electrocatalytic dechlorination performance of Pd-based catalyst
Authors: Chen Yanju , Wang Wenhong , Wang Minmin , Pan Yuan , Liu Yunqi
Published: June 2021

Chlorinated aromatic compounds are important raw materials or intermediates in many industries, but they are highly toxic and difficult to degrade in the natural environment. Electrocatalytic dechlorination technology can transform chlorinated compounds with high toxicity into substances with low toxicity and easy degradation, so it has broad application prospects. Compared with other metal catalysts, Pd-based catalysts have the highest electrocatalytic dechlorination activity. However, the high price of palladium limits the large-scale application of this technology. Hence, Ni doping strategy was used to reduce the usage of Pd in this paper, Pd-Ni and Pd-Ni-P catalysts were successfully prepared, and electrocatalytic dechlorination performance of 4-chlorophenol was studied. The results showed that the Pd-Ni-P catalyst had the highest dechlorination activity, the mass activity was 1.69 times that of pure palladium catalyst, and the use of Pd was reduced by 26.67%.
The difference of industrial NOx emission and the effect of income division reduction in China
Authors: Wang Xiaoshuo
Published: June 2021

In this paper, based on industrial added value and per capita NOx emissions intensity, regional emissions difference of China’s 30 provinces from 2008 to 2017 was calculated and analyzed by Theil index and an empirical research on the effect of various factors on NOx emission reduction. The main conclusions were as follows. The regional differences of China NOx emission intensity are evident. The regional difference of industrial added value of NOx emissions intensity was greater than the average per capita NOX emissions intensity and the differences are mainly shown in the western area by two kinds of indexes. On the whole, the impact of GDP per capita on industrial value-added emission intensity and per capita emission intensity is different. Therefore, in order to improve the effectiveness of NOx emission reduction, the government should adopt different strategy based on the income characteristics of different regions.
Research on the Development of Green Packaging
Authors: Ji Xuanyu , Yang Menghui , Ma Ling , Yang Yuntong
Published: June 2021

With the continuous development of world economy and science and technology, the logistics industry occupies more and more proportion in people’s daily production and life, but the pollution generated in each logistics link also increases. So the development of green logistics is already imminent. This paper focuses on the demand analysis of green packaging in logistics, and comparison, and finally proposes specific measures to develop green packaging. Through research, the development of green packaging should first pay attention to the choice of green materials, such as using recycling turnover boxes instead of cartons, electronic signatures to replace the original triple delivery slip. Secondly, the development of green packaging requires the joint efforts of all walks of society, including the government, enterprises and consumers.