bluuebunny/crossref_metadata_2025 huggingface dataset:
Physical and mechanical properties of coffee waste composites and viselin fabrics as alternative base materials for manufacturing products in the interior field
Authors: Purwanto
Published: May 2021

The results of coffee plantations and the growth of coffee shop entrepreneurs in Indonesia are increasing so that coffee shops (angkringan) have sprung up in various cities. World coffee consumption averages 1.7 kg per capita per year, in Indonesia it has increased by an average of more than 7% per year with the consumption of 4.55 million bags of coffee measuring 60 kg, a growth of 1.8% until the 2018/2019 period. In the city of Yogyakarta and its surroundings there are 1,200 coffee shops in 2017, this figure is much higher than the big cities around it. Yogyakarta is famous for its “jos” coffee in a lot around the Malioboro street. As a student city, many young people also enjoy coffee and produce a lot of coffee dregs waste. For this reason, this research raises about the use of coffee dregs waste into composites with viselin fiber reinforcement based on its physical and mechanical properties as an alternative base material for making products in the interior sector. The composite composition consists of coffee dregs ranging from 10,20,30,40, and 50 gr, 120 ml water, 3 gr alginate, glycerol 2,3,4 and 5 drops, so the elements varied are coffee and glycerol. The ingredients are mixed and heated then printed measuring 10 cm × 15 cm, then aerated for 24 hours. Composite results were tested for tensile, tear test, flexibility test and observation of surface texture. The results of the composite test with the composition of 30 gr of coffee and 3 drops of glycerol have the greatest tensile strength of 34.9 kg / mm and the tear resistance of receiving a load of 30.4 kg. For physical testing, it is obtained that a smooth surface can be bent and can even be formed into a tube so that the resulting composite can be used as an alternative material for making a product, especially in the interior field.
The synthesis of Ag3PO4 under graphene oxide and hydroxyapatite aqueous dispersion for enhanced photocatalytic activity
Authors: Sulaeman U , Permadi R D , Diastuti H
Published: May 2021

The development of Ag3PO4 photocatalyst for organic pollutant degradation is very challenging due to excellent activity under visible light exposure. The research aims to synthesize Ag3PO4 under graphene oxide (GO) and hydroxyapatite (HA) as a phosphate ion source for Rhodamin B degradation. The Ag3PO4/GO was prepared using the precipitation method with the starting material of graphene oxide aqueous dispersion, AgNO3, and hydroxyapatite suspension. The structure, absorption, morphology, and element composition of photocatalysts were studied using XRD, DRS, SEM, and EDX. Photocatalytic abilities of the samples were tested using RhB oxidation under blue light exposure. The results exhibited that GO improves the crystallinity andvisibleabsorption spectrum of Ag3PO4. Incorporating GO on Ag3PO4 decreases the ratio of O/Ag and O/P leading to a defect formation. The reaction mechanism on the surface of the photocatalyst was mainly run by holes and superoxide radical ions. The modification of Ag3PO4 using hydroxyapatite and GO improved photocatalytic activity.
An assessment Indonesia’s Ocean Thermal Energy Conversion (OTEC) as an electrical energy resource
Authors: Trenggono M , Hidayat R R , Cahyo T N , Mahardiono M D , Destrianty A D
Published: May 2021

The primary source of Indonesian electricity still has a dependence on the availability of fossil energy, which is limited in its presence and has non-renewable properties. It is necessary for alternative energy research as a renewable source of electrical power to replace energy sources that cannot be renewed. The one of energy is ocean thermal energy conversion, in which the technology is based on the thermal energy difference between surface temperatures and deepsea water to produce electricity. The research aimed to assess the power potential generated by utilizing the vertical sea temperature in some Indonesian waters. The survey method was used to collect secondary data from the HYbrid Coordinate Ocean Model. The process was completed with the conversion of OTEC to produce the electric base on the model applied by Rauchenstein. This model calculated the net power production of an OTEC plant as a function of water temperature and chilled water pipe length with the potential OTEC power generated for a closed cycle power plant of 100 MW / 150 MW gross power. The study found an average temperature difference of 20 °C at a depth of ≥500 m. Based on the seasonally mean, the highest potential of power was in the Papua of 174 MW during transitional season 2. The lowest value was assessed in Southeast Sulawesi of 82.09 MW in the southeast season. The highest electricity potential for annual average has been obtained in Papua with 168.33 MW and the lowest around 97.69 MW in North Sulawesi.
Analysis on the Transboundary Impact Assessment System and Practice of Hydropower Development on the Main Mekong River
Authors: Zhao Jin , Guo Lidan , Lin Jinghan , Dou Rui , Huang Yujia , Bao Yunxiang
Published: May 2021

The relevant documents and regulations on procedures and contents of transboundary impact assessment issued by the Mekong River Commission are combed. Combining with analysis of existing practice, experience and shortcomings of transboundary impact assessment in hydropower development on the main Mekong River is discussed. The results show that the transboundary impact assessment procedure of the Mekong River Commission is gradually improving. What’s more, the management mode of transboundary impact has gradually changed from paying attention to the prior evaluation to the whole process management. But there is no universal assessment standard for the transboundary impact, and the comprehensive assessment of the transboundary impact caused by hydropower development is lacked.
Performance analysis of a new type of rainwater power generation device based on piezoelectric effect
Authors: Ma Chenyu , Wang Xianfeng
Published: May 2021

In this paper, the water catchment device is combined with the piezoelectric cantilever beam to gather raindrops into a larger rainball to improve the power generation efficiency of the system. This makes rainwater power generation more feasible. The results show that when the rainfall intensity is constant, the output voltage of the power generation system increases significantly as the size of the rainwater converging device increases. With the same size of rainwater converging device, as the rainfall intensity increases, the power generation effect is also significantly improved, thus demonstrating the feasibility of the new rainwater power generation device.
Numerical simulation of borehole wall remodel during gas drainage
Authors: Li Lihua , Chen Yong
Published: May 2021

Gas drainage bearing coal and rock mass can be simplified as isotropic homogeneous body with gas saturation. Numerical method was used to study the influence of borehole wall remodel-size, remodel-length and negative pressure on gas drainage effect which based on gas diffusion and seepage equation of pore fracture system and governing equation of coal and rock mass degeneration. The results showed that borehole wall remodel can maintain the support of coal skeleton in borehole and prevent blocking the gas flow channel, gas pressure drop in remodelled section is more obvious than that in the non-remodelled section, the longer the remodelled length of borehole wall the more smooth the gas flow channel between borehole and coal body around borehole, with the increase of negative pressure, the decrease range of gas pressure at the same depth increases, but the difference is small under different negative pressure. On the premise of preventing borehole creep instability, borehole wall remodel can provide high-quality gas flow channel for coal seam gas drainage, maintain the continuous influence of negative pressure on coal body along borehole depth to extend the life cycle of gas drainage and is not sensitive to borehole wall remodel size and negative pressure.
Influence of microcapsules on self-healing performance and road performance of dense-graded asphalt mixture
Authors: Chen Bo , Liu Dabin , Chen Afang , Wang Yikai
Published: May 2021

Asphalt mixture containing microcapsules has a certain self-healing ability, which can prolong the service life of asphalt pavement. In order to study the self-healing performance and road performance of asphalt mixtures containing microcapsules, the intermittent fatigue test and split test were used to study the effect of microcapsule content on self-healing performance, and the road performance of the mixture with different microcapsule content was studied. The results show that with the increase of the amount of microcapsules, the intermittent fatigue life and SHSR of asphalt mixtures containing microcapsules increased first and then decreased, and reached the maximum when the amount of microcapsules was 6%. The low-temperature bending strain of the mixture increased, while the dynamic stability (DS) and TSR decreased. Considering the change law of self-healing performance and road performance, the recommended content range of microcapsules was 4%-6%.
Analysis of the Influence of the Shibahu Channel on Water Level and Sediment in the Lower Reach Yellow River
Authors: Caodong Jiang , Liangchao Ma , Dongfeng Li , Hongwu Zhang , Zihao Li
Published: May 2021

It is necessary to study and analyze the Shibadu flow path as a prospective alternative flow path for the Yellow River diversion. In this paper, the established two-dimensional mathematical model is used to calculate the Shibadu flow path and analyze the water level characteristics of the Shibadu inlet channel and the influence of the ocean tide level on the upstream water level and on the sediment transport. From the calculation results and water-sediment characteristics, it can be seen that: the Shibahu diversion is located in a bend, so it has a high resistance to the upstream water flow, resulting in a small change in the upstream water level at the diversion, a high upstream water level, and a significant decrease in the water level after the diversion; the range of the spread of the sediment movement in the Shibahu is small, and coupled with the weak ocean dynamics, the ability to transport sediment to the outer sea is poor, resulting in the inlet sediment near the mouth gate. The variation of sediment entering the sea during the rising tide and the falling tide is the same and different: the sediment concentration increases at a certain distance during the rising tide, but not during the falling tide. Both cases are about 41km away from the entrance, sediment began to settle.
Overbank Floods of Lower Yellow River Based on Two - dimensional Numerical Simulation and Analysis
Authors: Liangchao Ma , Caodong Jiang , Dongfeng Li , Hongwu Zhang , Zihao Li
Published: May 2021

When the flow of the Yellow River is large, a large range of floodplains will be formed around the main channel, and the crisis will greatly improve safety. Analysis of the changes of flood peak shape, flood peak propagation speed and flood level at large flow rate plays an important role in the protection and flood prevention of the Yellow River levee. Based on the established two-dimensional mathematical model of Luokou to the Yellow River estuary, the data of peak flow, velocity and water level are obtained by simulation calculation. By drawing the flood peak evolution process map from Luokou to Yellow River estuary, the change of flood peak type and flood peak propagation speed are analyzed to provide technical support for flood defense.
Study on the Development Path of High Efficiency Water Saving Agriculture in Chengdu Plain under the Background of Rural Revitalization Strategy
Authors: Hui Li , Chun-xiu Liao
Published: May 2021

In order to effectively promote the overall development goal of Rural Revitalization Strategy, aiming at the problems and development potential of high-efficiency water-saving agriculture in Chengdu Plain, this paper puts forward the conservation tillage technology focusing on Soil and water conservation, the water saving irrigation and rainwater harvesting supplementary irrigation technology focusing on the efficient utilization of water resources, and the chemical irrigation technology focusing on improving the drought resistance ability of crops. The development mode of water-saving agriculture in Chengdu Plain is put forward, which is the combination of water collecting agriculture mode, conservation tillage mode, two season fixed furrow double no tillage mode and modern agricultural water-saving irrigation technology mode. It is not only conducive to food security and regional economic development, but also effectively promote the sustainable development of environmental, ecological and social benefits.
Analysis on the characteristics of precipitation changes in the Yangtze River Basin in recent years
Authors: Yan Bo , Lu Zhihua , Yao Liqiang , Xu Bin
Published: May 2021

The Yangtze River is China’s mother river. In the context of climate change, it is of great practical significance to study the changes in precipitation in the Yangtze River Basin, especially in the event of a catastrophic flood in the Yangtze River Basin in 2020.. Based on the daily data of measured precipitation in the Yangtze River Basin, this study analyzed the trend and sudden change of precipitation, and also analyzed the intra-annual distribution during the year, and obtained the following conclusions: the change trend of the annual precipitation shows increase insignificantly, and the change-point occurred around 2015; the flood season accounts for 82.5% of the annual precipitation; the precipitation in the dry season has a slight increasing trend.
Reliability assessment method for environmental vibrations of a tunnel embedded in layered foundation
Authors: Xu Yonggang , Guo Huiji , Di Honggui
Published: May 2021

This paper proposes a reliability assessment method for environmental vibrations of a tunnel embedded in layered foundation under moving train load. Based on wave functions transformation, a vehicle-track-tunnel-soil model for evaluating system dynamic response can be established. Then combined with the Monte Carlo simulation, the reliability assessment of environmental vibrations is realized. The effect of soil parameter uncertainty on the prediction result of environmental vibrations is analyzed via case studies. The results show that the predictions from the deterministic model tend to be conservative, which is less than the superior limit of 95% confidence interval of the uncertainty model predicted outcome. The soil parameter uncertainty has less influence on the distribution of system dynamic response, which mainly affects the system dynamic response amplitude.
Thinking of Country House Based on the Concept of Green Development: Take Nanyang, Henan as an example
Authors: Zhang Yongwang , Wang Wanjiang , Li Chen , Liu Mengjun , Ni Pingan
Published: May 2021

With the introduction of a series of policies such as rural revitalization, beautiful rural areas, and a comprehensive well-off society, the concept of green development of rural housing has attracted widespread attention. The green development of rural houses can effectively slow down the speed of global climate warming, reduce environmental pollution, reduce energy consumption of buildings and achieve sustainable development of buildings. Based on a field survey in a village in Nanyang City, this article summarizes the current problems of rural housing development, and combines current green development concepts, local lifestyles and living habits, and puts forward some practical suggestions for rural construction and development; the green of rural housing Urbanization can better promote rural construction and provide relevant references for the long-term sustainable development of rural housing in the future.
Utilization of plants in ecological restoration Taking Chongqing Huashan Tianchi Park as an example
Authors: Zhang Zijing , Du Yihui , Hu Yuchao , Li Yi
Published: May 2021

Huashan Tianchi Park, located in the middle of Huashan Forest Park, has a unique geological wonder of sinkhole group. However, due to the existence of sinkholes, there is little water in sinkhole, and the damage of quarrying, the degree of rocky desertification around it is serious, so it needs to be repaired before it can be developed and utilized. Planners have formulated plans to use plants as materials to alleviate the hazards of geological environment, solve the problems of potential ground collapse, slope instability, open-pit quarry and waste soil and slag, make the park “green” and provide a natural ecological park for the masses.
A study on the sustainable development of shared communities based on the behavioral characteristics of youth people
Authors: Tao Yang , Dandan Wang , Dana Lv
Published: May 2021

As urbanization continues to accelerate, shared communities have emerged conforming to the current background of the times. Shared community is a option of youth groups in the transition period. It is both a new form of living and a new way of life. Beginning from the behavioral characteristics of youth people and their needs for living space, this paper is based on the national situation to conduct a analysis of the growable spatial form, the spatial model to promote interaction and the virtual community under the background of information age, and to proposes strategies to promote the sustainable development of shared communities.
Study on the Application of Migrants Evaluation System in the Rural Sustainable Development of Heilongjiang Province
Authors: Zhang Yuanjing , Wang Yue , Wang Chunlong , Lv Tianxin
Published: May 2021

As economy speeds up in China, the gap between the city and rural areas is huge and the rural hollowing is increasingly serious, which challenges the sustainable development of the villages. In this paper, Heilongjiang Province will serve as the research object. Firstly the quantitative analysis will reveal the spatial trend, age structure of migrants and industry absorption ability of the whole province. Then nine administrative villages will be selected to construct the migrant evaluation system to explore the behavioral rules and patterns, which integrate the idling land, migrants’ attributes, demands and occupational planning, etc. Finally, the strategies will be put forward from thoughts changing, green development of industry, urban-rural integration and ecological agriculture to realize the healthy, ecological and sustainable development of the villages.
Planning and Design of New Rural Characteristic Landscape under the Background of Rural Revitalization
Authors: Yin Zhang , Ting Chen
Published: May 2021

With the increasingly serious urbanization in rural construction, in order to maintain the original style of the countryside, through the field investigation and data analysis of Xinzhou District in Wuhan City, this paper studies the design status of local rural landscape. It takes the landscape design of Qubeihu village in Xinzhou District of Wuhan City as an example, follows the goal of green ecology and people-oriented sustainable development, and combines with the folk culture characteristics of Qubeihu village. It is integrated into the ecology, production and life, so as to realize the comprehensive sublimation of economy, culture and ecology of Qubeihu characteristic rural area.
Obstacle Factors Analysis on Green Building Material Certification from the Perspective of Stakeholders
Authors: Cao Shuangping
Published: May 2021

Green building material certification is an important measure to promote the transformation and upgrading of building materials industry and construction industry. Based on literature study and expert interviews, this paper identifies twenty-four obstacle factors in green building material certification from five respects including institutional, administrate, market, technology and society. Through a questionnaire survey of stakeholders in the building materials industry from different regions and Mann-Whitney U test, it analyzes the differences and reasons of stakeholders’ attitudes towards obstacle factors in green building material certification, and puts forward some suggestions on promoting the development of green building materials certification.
Experimental study on the seismic performance of coal gangue concrete frame columns
Authors: Bai Guoliang , Yan Fang , Liu Hanqing
Published: May 2021

The aim of this paper is to investigate the seismic performance of coal gangue concrete columns, a total of 5 specimens were subjected to low-cycled repeated loading tests. The replacement ratio of coal gangue aggregate is the main parameter. The failure mode, hysteresis curve, skeleton curve, stiffness degeneration, energy dissipation capacity and ductility of specimens are analyzed. The results show that the replacement ratio of coal gangue aggregate has a greater impact on the seismic performance. Increasing the replacement rate of coal gangue aggregate will result in an increase in energy dissipation capacity, a slower stiffness degradation, and an improvement in ductility. The practical application of the coal gangue concrete column has feasibility.
Mechanical Performance of HTCC Subjected to Elevated Temperatures
Authors: Xiaowei Yu , Haoxue Ju , Qun Xie
Published: May 2021

High toughness cementitious composite (HTCC) with high cracking resistance, high extensibility and high durability is widely applied in the field of civil engineering infrastructure, but in extreme environments such as elevated temperatures/fire due to the volatilization of organic fiber vulnerable to HTCC burst and mechanical performance degradation, structural damage and security problem. In this paper, the research status of post-high temperature mechanical properties is deeply analyzed. On this basis, suggestions for the optimization design of mechanical properties of HTCC to elevated temperature are put forward to provide technical support for the engineering application of this material.
2-D soil slope-stability evaluation using vector-sum method
Authors: Guo Mingwei , Dong Xuechao
Published: May 2021

Over the stress state of the sliding body artificially assumed in Limit equilibrium method, the real stress state from any numerical analysis can be imported into a limit equilibrium analysis where the normal stress and shear stress are computed with respect to any selected slip surface. Considering the vector characteristics of force and the strength reduction definition, vector sum method by strength reduction technique was proposed, in which the factor of safety (FOS) can be directly calculated by the force and moment equilibrium. Finally, numerical experiments with six possible conditions are used to verify this proposed method, and the results show that the FOS obtained by the proposed method is in good agreement with the average FOS by limit equilibrium methods.
Study on strength test and hydration mechanism of phosphogypsum based cemented backfill
Authors: Wei Hanbo , Wen Zhenjiang , Ba Lei , Gao Qian
Published: May 2021

In view of low early strength of phosphogypsum based slag cementitious material, exploration test of filling body strength is developed to get the optimal ratio of cementitious materials. Firstly, the physicochemical analysis of the test material was carried out; secondly, the cementitious material ratio and strength of waste rock coarse aggregate filling body was tested by orthogonal test and range analysis. In the end, the hydration products and microstructure of cementitious materials were analyzed by XRD and SEM. The results show that, for the slurry with waste rock coarse aggregate, 1:4 cement sand ratio and 80% mass concentration, the optimal ratio of cementitious materials is determined as phosphogypsum 30~33%, quicklime 5.5~6.0%, NaOH 1.5~2.0%, mirabilite 2.5~3.0%. The average particle size of cementitious material is - 16μm, and the early strength agent or synergist must be added, which could meet the requirements of the Jinchuan mine.
Study on the influence of deep foundation pit excavation on adjacent metro structure
Authors: Yu Changyi , Long Jie , Lu Mingyue
Published: May 2021

The excavation of deep foundation pit will have an adverse impact on the existing adjacent subway structure, which is affected by a series of factors such as subway structure, foundation pit depth and excavation construction process. Based on the excavation of a deep foundation pit adjacent to a subway station in Tianjin, through three-dimensional numerical calculation and analysis, it is concluded that after the excavation of the foundation pit, the structure of the subway station has local settlement, local floating and small horizontal displacement. According to the numerical results, the corresponding hazard sources are put forward, and the monitoring and early warning pre-values of hazard sources are given, in which the reference value of floating wind pavilion is about 1.3cm, the reference value of settlement value at the entrance and exit of subway station is about 6mm, the maximum horizontal displacement of diaphragm wall is about 7cm, and the maximum settlement outside pit is about 5cm. The results of this paper provide a basis for engineering risk points, and provide operational guidelines for monitoring risk points.
Study on the Influence of the Pre-Wetting Time of Ceramsite and the Floating Beads Content on the Property of Lightweight High-Strength Concrete
Authors: Xu Jun , Liu Dan , Zhan Yijian , Zhu Ran
Published: May 2021

The influence of different ceramsite pre-wetting time and the floating beads content on the properties of lightweight high-strength concrete was studied in this paper. The results showed that as the pre-wetting time increased, the absorption rate of ceramsite continued to increase, reaching a saturated state at 12 h with 36.14% water absorption rate; the concrete slump/expansion degree is increased significantly, and the growth rate decreased gradually, and the improvement was not obvious after 12 h; the 7 d strength of concrete saw an obvious downturn, and the strength dropped by 10.4% at 12 h, after which the decline was basically stable; the 28 d strength, 28 d strength growth rate and 7 d-28 d strength growth rate all showed a steady upward trend, which reached 61.18 MPa, 12.4% and 29.73% respectively at 12 h, and the growth rate was basically stable afterwards; as the floating beads content increased, the concrete dry density, slump/expansion degree, 7 d and 28 d strength all showed a significant decline trend.
Research on cost management of prefabricated construction based on BIM
Authors: Wen Zhen , Zhang Hanxi
Published: May 2021

In recent years, prefabricated construction has been widely concerned with its significant advantages of high efficiency, environmental protection and energy saving. However, the prefabricated construction in China is in the initial stage, with more theoretical research than practical cases. Even with strong policy support, the development of prefabricated buildings is relatively slow. There are many reasons for this. The main reason is that the cost of prefabricated construction is too high for most developers to bear. This paper attempts to study the effect of BIM Technology on the whole process of cost management, aiming to solve the problem of cost compression in the implementation stage of prefabricated construction project and overcome the bottleneck of prefabricated construction development.
Research on big data processing of water conservancy automation
Authors: Zhaochunlei
Published: May 2021

with the continuous development of computer technology, data processing technology continues to bring forth the new, especially with the development of big data, distributed cluster and cloud computing technology, digital water conservancy began to change to smart water conservancy. One of the important technologies to transform from digital water conservancy to smart water conservancy is the processing of water conservancy big data, which is the core technology to realize wisdom. A complete work-flow of big data processing includes data collection and importing, data cleaning and quality control, data management and storage, data analysis and visualization, data modeling and model management. This paper mainly proposes a solution to the real - time streaming big data processing of water conservancy automation, which can effectively process the real-time high frequency streaming big data reported by water conservancy automation equipment.
Application Analysis of Information Technology in the Yellow River Flood Control Project Management
Authors: Zhanjun Yuan , Liang Zhao
Published: May 2021

The central task of the Yellow River flood control works management is to maintain the integrity of the project and ensure the flood control ability of the project does not decrease. In order to achieve this goal, the Yellow River management departments at all levels need to use modern technology to supervise a set of modern project management system, so as to understand and grasp the project operation status in real time, so as to timely find and eliminate the project hidden dangers, and ensure the safety of the downstream embankment and flood control operation.
Installation and construction technology of steel column under cup foundation of industrial plant
Authors: He Fang , Wang Yuying
Published: May 2021

This article introduces the installation process of the steel structure column of a single-storey industrial factory building on a cup-shaped foundation, through the use of column bottom angle steel welding treatment, steel wedges, jacks, and the coordinated use of cable wind ropes, the steel column elevation adjustment measures are finally determined, which solves the elevation deviation caused by the cup-shaped steel column installation and the difficulty in the steel column hoisting process Controlled construction technology issues.
Passive design of green public buildings adapted to cold climate: a case study of China pavilion of the international horticultural exhibition 2019 Beijing China
Authors: Jing Quan , Li Jingwei , li Liang , Jia Meng , Zhou Ye , Zhao Xiangyu
Published: May 2021

This paper took the China Pavilion of the International Horticultural Exhibition 2019 Beijing China as the subject for study. Based on the influence of cold climate on people’s behaviors and their perception of the environment, the paper proposed designs of green public buildings adapting to the cold climate and analyzed the overall functions of green buildings via tests of temperature, humidity, illumination and total energy consumption to verify the ecological features and energy conservancy of the buildings, forming a closed-loop chain of procedures of the green design.
Design Study on the Conservation and Reuse of Modern Industrial Building Heritage
Authors: He Huaxue
Published: May 2021

As an important part of the world cultural heritage, industrial architectural heritage is an important witness to the achievements of the development process of human industrialized civilization. With the national industrial structure adjustment and urbanization, many typical industrial factories in China are facing the problem of land replacement, among which, the modern industrial architectural heritage is facing the corresponding problem of conservation and reuse. People’s demand for material and cultural life is increasing, and they are more concerned about the protection of urban heritage and memory, which actively promotes the protection of industrial architectural heritage and also puts forward higher requirements for the utilization of industrial architectural heritage. The research in the field of industrial heritage in China started late compared to that in Europe and the United States, and usually, architects dominate the design of industrial heritage reuse more than heritage conservators. This paper addresses the problems in the process of conservation and reuse of industrial architectural heritage, and carries out research work from the perspective of heritage conservation and reuse design. It analyzes the current situation of industrial building heritage reuse design in China and conducts research on the problems existing in the process of industrial building reuse design. It also discusses the bottom line and criteria for the conservation and reuse of industrial building heritage, and discusses the design strategies for the conservation and reuse of modern industrial building heritage according to the industrial building research results in categories.
Design of Family Rooms for Environment-Friendly Hotels Based on Parent-Child Interaction
Authors: Wei Liu , Qiuye Liu , Yingzhi Liu , Xinghui Liu , Huajun Du
Published: May 2021

There has been a growing demand for family rooms of a hotel based on parent-child interactions as a result of the development of tourism. Unlike conventional designs of hotel rooms, the family room of hotels features a higher level of parent-child interactions. This paper investigated and studied literatures on the mentality and behaviors of children, and analyzed the mental needs of parents, aiming to boost parent-child interactions in an environment-friendly way. The paper proposed a design incorporating graffiti, window opening and holes in walls. By encouraging graffiti and design by parents and children, the room allows children to make a full use of imagination, practice manual skills and cultivate the awareness of environmental protection. The design fits the behavioral pattern of children and incorporate the elements of games, meeting the needs of both parents and children and enhancing the parent-child interactions of hotel family rooms.
Temperature and Strain Monitoring Analysis of Self-Compacting Concrete Bridge Decks with Mechanized Sand
Authors: Duan Zhongjian , Song Xiaoruan , Zhang Yatao , Song Lei , Zhang Zhichao
Published: May 2021

The temperature control of self-compacting concrete with machine-made sand is an important research element related to the safety of actual projects. A reasonable and feasible temperature and strain monitoring scheme was designed for the bridge abutment project of Honghezhou Special Bridge in Yunnan Province, and the monitoring results of the concrete abutment on site were analyzed. The results show that the temperature of self-compacting concrete with mechanism sand has the characteristics of large temperature rise and rapid cooling compared with ordinary concrete, and the concrete surface layer is prone to cracking from 1.5d to 4d of age, and the concrete foundation part is prone to cracking at about 9d of age. It can provide reference for the temperature crack prevention and control of similar mechanism sand self-compacting concrete projects.
Application study on numerical analysis method of onshore launching system design for over-length with large diameter HDPE pipe
Authors: Wang Weizhi , Xue Linhu , Chen Meng
Published: May 2021

Due to High-Density Polyethylene Pipes (HDPE) hold the characteristics of reliable connectivity and service life, good impact resistance, low fluid resistance and excellent corrosion resistance, especially for large diameter HDPE pipes are more economic, they have been applied to drainage projects. The overlength HDPE pipe with large-diameter has the combined characteristics of rigidity and flexibility, namely, rigidity is dominating within small pile length, flexibility will then dominate with the increasing of pipe length, which lead to onshore launching will be under dynamic changing process, hence the slope of launching ramp, the bearing capacity of the pipeline onshore launching system and the linear control will be very critical, which will make onshore launching of over length HDPE with large diameter more difficult. Based on the numerical dynamic analysis and simulation, and based on the JIGCC Project in Saudi Arabia, the onshore launching process of overlength HDPE with large diameter is studied. The results not only state the loading state of HDPE and launching systems during the onshore launching stage, but also provide a theoretical basis for a more reasonable and economic design of the over length HDPE with large diameter onshore launching system. Introduction
Research on overall bearing characteristics of high-piled wharf under horizontal load
Authors: Xie Yaofeng , Zhan Tianxin , Fan Yue , Chen Jinhang , Xie Zhengjun
Published: May 2021

Based on ANSYS model, this paper conducts simulation analysis of high-piled wharf. This paper studies the maximum stress of each pile in the bent frame, and obtains its change law. Through research, the load-displacement curve of the high-piled wharf is constructed, and the method for judging the overall ultimate bearing state of the high-piled wharf is established. The research results can provide a reference for the study and judgment of the overall bearing safety of high-piled wharf under horizontal load.
Determination of Deviation Risk of an Event from Mathematical Expectation When Managing Research in Space and Time
Authors: Borovik V S , Borovik V V , Borovik A V
Published: May 2021

The paper analyses various time segments of a random process and shows how the covariance of the values of random functions for different times is displays. It is accepted that any type of management involves the optimal use of factors, avoiding the uncertainties that are inevitable with a statistical approach to the sequencing of scientific research. The model includes the risk minimization of the real process deviation from the anticipated one. The concept of the quasi-ergodic idea of two functions, which characterize this concept with the corresponding form of integrals, is important for a further understanding of the presented theory. Various time segment of a random process are analyzed during the scientific research, and it is shown how the covariance of random functions’ values for times is manifested. The proposed model allows us to expand the boundaries of the automation of the research management process in space and time, taking into account the risk associated with the use of factors of the digital model.
Allometric models to estimate the aboveground biomass of forest: A literature review
Authors: Latifah Siti , Purwoko Agus , Hartini Kansih Sri , Fachrudin Khaira Amalia
Published: May 2021

Forests are important carbon sinks throughout the world, and therefore, the key to reducing the impact of climate change. Allometric models are essential for measuring biomass and carbon storage in forest ecosystems. Expected allometry exists for tropical trees, but species-specific models and locations are more accurate. The more reasonable methods for estimating tree biomass and carbon storage in forests, are very critical given, concerns to be global climate change. This study aimed to clarify the model formation in estimating aboveground biomass. The stages of this research include several steps, namely in the initial stages, gathering articles, and journals, then making a resume and classifying the independent variables used in allometric models. The most common independent variables are diameter at breast height (DBH) and height data.
Simulation for replanting eucalyptus: A review
Authors: Sembiring Nurhayati , Napitupulu Humala Lodewijk
Published: May 2021

Eucalyptus more preferable because of its rapid growth, original origins, and versatile use. Technological innovation and development have a significant influence on the industry with eucalyptus raw materials. In long-term planning on forest productivity, analyzing variability and climate change, and their impacts, foresters, and companies use the most promising tools for eucalyptus-based models. Growing credibility and accuracy of choice-making in the forest system is paramount. Forest simulation models can estimate the yield of Eucalyptus in various climates and soil sorts if nicely calibrated. Reducing the estimated error of Eucalyptus results can also be reduced by using a multi-model ensemble. This study conducted a literature review on Simulation for Replanting Eucalyptus. Obtained 20 relevant literature for qualitative analysis based on the years 2000-2020, along with several areas that were the focus of research.
Analysis of interfacial behavior in two-phase flow using image processing
Authors: Digpriya  , Saini S , Banerjee J
Published: May 2021

Two-phase flow has a wide range of application from petroleum to space industry. Gas-liquid two-phase flow in horizontal pipe commonly occurs in petro-chemical, nuclear and geothermal industry, where simultaneously gas and liquid are transported through pipelines. During the transportation of gas-liquid flow simultaneously, due to the interaction of two phases, slug forms from the stratified-wavy flow. Slug flow consists of strong aeration at the slug front which is responsible for pipe failure and hazards in industries. Thus, it is required to understand the phenomena of slug formation in industrial pipeline to avoid the catastrophic pipe failure. In the present research, image processing technique is used to accurately analyze the interfacial behavior of two-phase flow. The interfacial behavior plays crucial role, as it is the plane where the two phases interact and interaction of the phases leads to the transition of different two-phase pattern. Experimentally captured images are processed using image processing algorithm, to study the variation of liquid film thickness. With the help of liquid film thickness transition of the interface is analyzed for different superficial Reynolds number of liquid and gas. Further, a PDF analysis is reported to understand the mechanism of the growth of the wavy interface.
Automated Product Inspection in Industry 4.0 Environment
Authors: Kiran M B
Published: May 2021

The emergence of Industry 4.0 technologies demands new techniques of measurement which would facilitate seamless integration with other devices in the wireless IoT network. Many of the existing product inspection methods cannot be deployed directly in the IoT environment. Thus, there is a need for innovative inspection techniques in the Industry 4.0 environment. In this context, the proposed inspection technique assumes special significance. Surface irregularities observed in product manufacturing can be due to chatter, vibration, worn-out cutting tools, condition of the machine tools, etc. Evaluation of surface texture helps in predicting a product’s functionality. In this work, an attempt has been made to identify the surface texture images acquired from Shaping, Milling, Electric discharge machining (E.D.M.) and Sand Blasting processes during online inspection. In addition to surface texture identification, the proposed method will also measure surface roughness and component dimensions. Thus, entire product inspection can be done online, and in a single setup. This is also an 100% online inspection method. The main contribution of this proposed research work is that all types of inspection are completed in a single set up, resulting in significant savings.
Basic characterization and carbon capture study of an indigenous activated carbon
Authors: Gautam  , Sahoo Satyabrata
Published: May 2021

The current research article deals with the fundamental characterization and carbon capture study of an indigenous activated carbon (AC) named MODISORB PL 4, derived from bituminous coal. Physical characterization to study the porous properties is carried out using N2 adsorption/desorption at 77 K on a 3 Flex Micromeritics Setup. The activated carbon sample has a BET surface area of 1213.016 m2/g, a pore volume of 0.285 cm3/g, and a pore size of 33.44 Å. The structural analysis carried out by powder XRD confirms the presence of graphite lattice in the adsorbent AC. The surface morphology is studied by FE-SEM analysis, which revealed that adsorbent activated carbon is microporous. The CO2 adsorption study is carried out for a relative pressure range of 0 to 1 and temperature varying from 298-333 K. The experimental data confirm the exothermic and physisorption behavior of the process. Isotherm models; Toth and Sips are fitted with the experimental CO2 adsorption data, in which both resulted in a good fit for the temperature and pressure range taken. The corresponding isotherm constants are illustrated in the article. Further, a comparison study is carried out with the existing literature to compare the CO2 uptake at ambient conditions, revealing that the assorted AC sample has immense potential for gas sorption, energy storage and carbon capture.
Desalination of brackish water using cascade Rankine cycle based reverse osmosis system
Authors: Raninga Milan , Mudgal Anurag , Patel Vivek , Patel Jatin
Published: May 2021

The desalination of brackish ground water using cascade Rankine cycle is proposed. A pair of a Rankine cycle like steam Rankine cycle (SRC) and organic Rankine cycle (ORC) as a waste heat recovery. The single stage steam turbine for the SRC unit while the scroll expander for ORC unit is selected. Simulation of cascade RO system performance is considered using R245fa as a working fluid for ORC unit. The saturated steam from solar Scheffler disc will expand into steam turbine, where the reject heat from steam turbine will utilize for evaporation of ORC working fluid. The high-pressure RO pumps integrated with SRC and ORC turbines to provide net driving pressure to the RO module. This type of system is well suitable for desalination of brackish water due to moderate working temperature & pressure. Result shows that the pair of Rankine cycle will increase the overall (cascade) efficiency of the system. The basic input parameters are optimised with Taguchi approach. The performance of the system shows a good agreement with variation of mass flow rate of the steam in which the permeate flow rate from RO will increase along with the cycle efficiencies.
Exploiting the challenges of copper to austenitic stainless steel bimetallic joining by gas tungsten arc welding: A fluid flow perspective
Authors: Darji Raghavendra S. , Joshi Gaurang R. , Oza Ankit D. , Badheka Vishvesh J.
Published: May 2021

Miscible nature of the material is vital to join dissimilar materials together. The wide range of properties within the single structure requires merging of multiple materials. Hence, sustainable welding technology development to join distinct material with extreme immiscibility such as Cu and SS is emerging as a recent research interest. Because of its requirement in nuclear reactors’ critical components, plan wave linac structures and ultra-high vacuum systems. Gas tungsten arc welding is a well-established commercial process. Hence, a study on optimum weld condition to get better quality of Cu to SS bimetallic joint is advantageous and desirable. However, complex flow nature of the molten Cu and SS is a big challenge. Hence, authors have reviewed and discussed the fluid flow of Cu and SS during gas tungsten arc welding. Which, concludes that the flow characteristics of Cu and SS must be studied through experimental and simulations to set up the favourable weld conditions while joining it with gas tungsten arc welding. The mentioned area of interdisciplinary research and not explored yet about the joint’s mechanical and microstructural properties. The said study can potentially predict what will be the final weld properties well before the metallurgical testing. Moreover, the article enlightens the interdisciplinary research aspect of Cu to SS bimetallic joining.