bluuebunny/crossref_metadata_2025 huggingface dataset:
Development assistive technology for students with hearing impairments
Authors: Santoso Yoga Budhi , Astuti Eka Yuli , Ratnawulan Teti , Khoeriah N. Dede , Hakim Luki Luqmanul
Published: July 2020

Lip reading is a technique of understanding speech by visually interpreting the movements of the lip when normal sound is not avalaible. Also as a primary method for individuals with hearing impairment to understand others speech. Lip reading requires constant attention to obtain complete information. The fact is that students with hearing impairments have difficulty to doing this in the class, because they have to do other activities such as writing or asking a friend. So it cause some of the information conveyed by the lecturer is not to be captured. Considering that technology plays an important role in clouded communication and information needs for individuals with hearing impairment. It is necessary to develop assistive technology that can help students with hearing impairment to more easily receive material delivered by lecturers by converting sound to text form in real time that can be accessed and stored by student cellphones. This research involved 2 programmers, 3 validators, 2 lecturers and 3 students with hearing impairment. Based on the results of validation and testing, it shows that this assistive technology can be used easily for lecturers and help students to understand the material more easily.
Learning By Google Classroom in Students’ Perception
Authors: Fitri Rahmawati B. , Zidni  , Suhupawati
Published: July 2020

Learning is not only done in the real world, but also through cyberspace through internet intermediaries. One application that has been utilized in the learning is the Google Classroom. The objective of this research is to analyze student’s perceptions about learning by Google Classroom. This study used qualitative method. The informants in this study were student of historical education study program. Data collection techniques used was in-depth interviews and the analysis technique uses descriptive analysis. The result of this study indicate that the use of Google Classroom is considered effective for assignments but is less effective in terms of material discussion because students can access and send the assignments easily in anywhere without having to meet directly with lecturers, the students can attend lectures anywhere and anytime but students lack understanding of lecture material. Therefore, learning by Google Classroom cannot replace face-to-face lecture activities.
Influence of integrative learning model based on lesson study in student’s reading comprehension ability
Authors: Jauhari Saprudin , Hakim Arif Rahman , Kudsiah Musabihatul , Yazid Muh.
Published: July 2020

The purpose of this research to examine the influence of the integrative learning model based on lesson study in reading comprehension ability for five grade students of SDN 3 Sakra. The type this research is a quasi-experimental research with a posttest only control design. The population in this study is all students of five grade in SDN 3 Sakra which consists of two classes. VA class as a control group and VB as an experiment group. The techniques of collecting data research in the form of observation and test. Analysis techniques data is used to examine the use of hypotheses with the formula t-test. The results of the research refer that the ability of reading comprehension with the integrative model based on the lesson study is higher than reading comprehension with the conventional method. This is evidenced by the t-test with a significance level of 5% obtained t accounted (8.889) > t table (1.697). The value of t accounted > t table shows that the ability of reading comprehension of the two groups differs significantly. Based on the value of t account, it can be concluded that learning by using an integrative model based on lesson study gives a positive influence for reading comprehension ability of grade V SDN 3 Sakra in the academic year 2018/2019.
The Influence Of Two Stay Two Stray (TS-TS) Cooperative Model On Problem Solving Ability
Authors: Asri Indra Himayatul , Lestarini Yuniar , Fajri Nurul
Published: July 2020

The purpose of this research is to know whether there is an influence of cooperative model type Two Stay Two Stray (TS-TS) on problem-solving abilities on the subject of ecosystem class VII at junior high school. This type of research is Quasi-Experimental Design research. The technique of collecting data using a test, test in the form of description is 7 problem. Data analysis techniques to see problem-solving ability using normality test, homogeneity test, and t-test (t-test). The result of this research is the average value of post-test in the experimental class 73,71 and the control class 60,86, for the mean value per indicator that is in the experimental class of the indicator understand the problem (49,71), prepare the problem-solving plan (11.80) and implementing a problem-solving plan (12,19). While in the control class the indicator understands the problem (36,43), prepares the problem-solving plan (11,38), and implements the problem-solving plan (13,04). To test the hypothesis obtained t-count (4,5395)> t-table (1.6801). Thus there is influence of Two Stay Two Stray (TS-TS) cooperative model on problem-solving ability on VII classroom SMPN 2 Sembalun Bumbung Academic Year 2016/2017.
Development of Multimedia Learning in Hydroponic Farming on Children with Hearing Impairment
Authors: Safaruddin  , Taufan Johandri
Published: July 2020

Almost every subject will relate to agricultural material, such as farming and getting to know plants. However, some Special Schools in Padang have very limited yards so children with hearing impairment are farming by using polybags. In the use of polybags, plant care requires greater effort because children must routinely control the nutritional needs and water availability in the polybags. Based on these problems, this article will discuss the development of multimedia learning in hydroponic farming. This study used the research and development (R&D) method. Design validation used an educational expert in teaching children with special needs, an expert in educational technology, and an expert in hydroponics. Data were analyzed using the non-parametric Wilcoxon signed-rank test. The result showed that the subject’s ability to grow crops increased. Based on these results it can be concluded that this multimedia learning in hydroponic farming can be used in agricultural activities in Special Schools. The findings obtained in this study are the development of a video tutorial that has been validated by a validator and can be used on children with hearing impairment who are in special education.
The Feasible Module of Geometry for Think Pair Share Learning Based on Ki Hadjar Dewantara Teachings
Authors: Taufiq I , Arcana I N , Sumiyati  , Sucahyani V , Mas’ad A
Published: July 2020

The aim of this research was to develop a module of Geometry at junior high schools for Think Pair Share Learning based on Ki Hadjar Dewantara teachings and to determine the feasibility of the module. This study was used Research and Development (R&D) method. This research has produced a module of geometry. It has been tested twice, namely a limited trial of 5 students and a main trial of 25 students in SMP N 12 Yogyakarta. The module has been validated by the material expert validator and the module expert validator who are lecturers of mathematics education department and the teacher. The mean score for the material is 3,59 wich is categorized very well, while mean score the module is 3,77 wich is categorized very well too. The student questionnaire responses obtained an average score of 88,09 and the percentage of learning accomplishment was 93.92%. As a result, this module was very well criteria and feasible to use. Eligibility is also supported by the correlation of students’ questionnaire response scores and learning achievement tests with a correlation coefficient of 0.53 with a high category, so this module is feasible to use.
The effectiveness of Team Assisted Individualization (TAI) based Assessment for Learning (AfL) in Student’s Mathematical Reasoning Ability of Junior High School
Authors: Argianti A , Andayani S , Wijayanti K , Mulyono
Published: July 2020

This research aims (1) to examine the completeness of classical learning classroom with learning model Team Assisted Individualization based Assessment for Learning, and (2) to examine the comparison of the ability of student’s mathematical reasoning with learning model Assisted Individualization based on Assessment for Learning and direct learning model. This research uses a quasi experimental design method with posttest-control-group design. The population in this study was the regular students of grade VIII SMP Negeri 3 Pati in academic year 2016/2017. By cluster random sampling technique, VIII D and VIII E were selected as a sample. The data collection techniques used observation, tests, and documentation. Quantitative data analysis uses z-test and t-test. The result of the research shows that (1) student’s mathematical reasoning ability with learning model Team Assessed Individualization based on Assessment for Learning model achieves classical completeness, and (2) the student’s mathematical reasoning ability with the Assessed Individualization based on Assessment for Learning is better than the direct learning model.
Realization of a push-me-pull-you swimmer at low Reynolds numbers
Authors: Silverberg O , Demir E , Mishler G , Hosoume B , Trivedi N , Tisch C , Plascencia D , Pak O S , Araci I E
Published: July 2020

Locomotion at low Reynolds numbers encounters stringent physical constraints due to the dominance of viscous over inertial forces. A variety of swimming microorganisms have demonstrated diverse strategies to generate self-propulsion in the absence of inertia. In particular, ameboid and euglenoid movements exploit shape deformations of the cell body for locomotion. Inspired by these biological organisms, the ‘push-me-pull-you’ (PMPY) swimmer (Avron J E et al 2005 New J. Phys.
7 234) represents an elegant artificial swimmer that can escape from the constraints of the scallop theorem and generate self-propulsion in highly viscous fluid environments. In this work, we present the first experimental realization of the PMPY swimmer, which consists of a pair of expandable spheres connected by an extensible link. We designed and constructed robotic PMPY swimmers and characterized their propulsion performance in highly viscous silicone oil in dynamically similar, macroscopic experiments. The proof-of-concept demonstrates the feasibility and robustness of the PMPY mechanism as a viable locomotion strategy at low Reynolds numbers.
Smallholdings with high oil palm yield also support high bird species richness and diverse feeding guilds
Authors: Razak Syafiq A , Saadun Norzanalia , Azhar Badrul , Lindenmayer David B
Published: July 2020

Biodiversity has been devastated globally in the past hundred years, largely because of land conversion and agricultural intensification. Conversion of tropical forest to oil palm plantations is one of the greatest per unit area contributors to biodiversity loss in Southeast Asia. Concerned consumers, mainly from developed countries, have begun demanding sustainable palm oil in response to these issues. More ‘biodiversity-friendly’ oil palm production is also in demand, similar to that of other commodity crops (e.g. coffee, cacao). However, farming practices that improve biodiversity are thought to reduce yield, leading to increased pressure to clear more forest, resulting in further biodiversity loss. Here, we explore relationships between oil palm yield and avian biodiversity. To gather data on yields and agricultural inputs, we interviewed smallholders in Selangor, Peninsular Malaysia. We also quantified bird species richness, feeding guild diversity, abundance, and vegetation structure in smallholdings. We found that smallholdings with high yields were characterised by high species richness and feeding guild diversity, but low bird abundance. Our empirical results show the benefits to both yield and avian biodiversity of a wildlife-friendly strategy in smallholdings. We encourage the integration of farming practices with management that improves biodiversity to reconcile oil palm production and nature conservation.
The contribution of different aerosol types to direct radiative forcing over distinct environments of Pakistan inferred from the AERONET data
Authors: Khan Rehana , Kumar Kanike Raghavendra , Zhao Tianliang , Ali Gohar
Published: July 2020

To quantitatively estimate and analyze the contribution of different aerosol types to radiative forcing, we thoroughly investigated their optical and radiative properties using the Aerosol Robotic Network (AERONET) data (2007–2018) over an urban-industrial (Lahore) and coastal (Karachi) cities located in Pakistan. The contribution of inferred aerosol types following the threshold applied for FMF500 versus SSA440 and EANG440−870 versus AANG440−870 were found the highest for pure dust (PUD, 31.90%) followed by polluted continental (POC, 24.77%) types of aerosols, with moderate contribution was recorded for polluted dust (POD, 20.92%), organic carbon dominating (OCD, 11.85%), black carbon dominating (BCD, 8.77%) and the lowest for the non-absorbing (NOA, 1.79%) aerosol type. Seasonally, the mean (±SD) aerosol optical thickness at 440 nm (AOT440) was found maximum (0.73 ± 0.36) for PUD type in summer and minimum for BCD (0.25 ± 0.04) during spring at Karachi. However, the mean (±SD) AOT440 varied from 0.85 ± 0.25 during summer to 0.57 ± 0.30 in winter at Lahore, with the highest contributions for POC (29.91%) and BCD (22.58%) and the lowest for NOA (5.85%) type of aerosols. Further, the intensive optical properties showed significant temporal and spectral changes and the complexity of inferred aerosol types over the study sites. The results are well substantiated with the air mass analysis obtained from the concentration weighted trajectory (CWT) model for different aerosol types. The Santa Barbara DISORT Atmospheric Radiative Transfer (SBDART) model revealed the strong presence of BCD aerosol type led to a surface (BOA) and top of atmosphere (TOA) forcing of −70.12, −99.78 Wm−2 and −9.60, −19.74 Wm−2, with an annual heating rate of 2.10 and 2.54 Kday−1, respectively, at Karachi and Lahore sites.
Limiting food waste via grassroots initiatives as a potential for climate change mitigation: a systematic review
Authors: Mariam Nikravech , Valerie Kwan , Karin Dobernig , Angelika Wilhelm-Rechmann , Nina Langen
Published: July 2020

An estimated 30%–50% of food produced for human consumption is lost or wasted each year. These global food loss and waste (FLW) annually generate 4.4 Gt CO2-eq, or about 8% of total anthropogenic greenhouse gas (GHG) emissions, and thus present a still underestimated driver of climate change. To date, little is known about grassroots initiatives dedicated to reducing and preventing FLW and their actual potential to prevent FLW and thus contribution to mitigate GHG emissions. This paper presents a systematic review that examined the peer-reviewed evidence on grassroots initiatives’ potential to limit food waste and GHG emissions. We found 15 relevant studies which represent a small but recent and growing interest in the topic. The findings of the studies are mostly of a qualitative nature, exploring the initiatives’ organizational structure, goals and available resources. This systematic review highlights a pressing need for further research and impact measurement to better assess the role of grassroots initiatives in FLW reduction and climate change mitigation. It raises main directions for future research.
The marginal stability of the metastable TAP states
Authors: Plefka T
Published: July 2020

The existing investigations on the complexity are extended. In addition to the Edward–Anderson parameter q
2 the fourth moment

q

4

=
1
/
N

∑

i

m

i

4

of the magnetizations m

i
is included to the set of constrained variables and the constrained complexity Σ(T; q
2, q
4) is numerical determined. The maximum of Σ(T; q
2, q
4) (representing the total complexity) sticks at the boundary for temperatures at and below a new critical temperature. This implies marginal stability for the nearly all metastable states. The temperature dependence of the lowest value of the Gibbs potential consistent with various physical requirements is presented.
Study on the Main Inner Insulation of 1100kV UHVAC Oil-gas Bushing and the Structure Optimization Design of its Fittings
Authors: Zhang Shiling
Published: July 2020

The oil-gas bushing has the characteristics of compact structure and small floor area, which can be widely used in various voltage level substations to realize the electrical connection between transformer and high-voltage combined electrical apparatus GIS. At present, the development of oil-gas bushing for 1100kV AC extra high voltage level is the first time. It is necessary to solve the problems of the material development of main insulation core of bushing, the design and optimization of main insulation of core and the current carrying capacity of large current conductor of bushing structural design and other key technologies. This paper focuses on the analysis and calculation of the optimization design of main insulation structure of 1100kV UHV oil-gas bushing. Considering that the end of the oil-gas bushing is connected to the winding side of the transformer and the center conductor of the high-voltage combined electrical appliance in the narrow space, it is necessary to optimize the design of the structure of the fittings at both ends of the bushing to ensure that the electric field distribution is reasonable under the action of high voltage, and that it carries large current without local overheating area. Based on this, three-dimensional finite element simulation model of UHV oil-gas bushing tooling is established, and the main insulation structure of the bushing core is optimized to make its axial and radial field strength meet the control requirements. The topological structure and size of the current carrying structure in the center of the bushing and the voltage equalizing device at both ends are given, and the prototype and supporting tooling structure of the oil-gas casing are developed according to the optimized design structure, and go through various bushing type tests. In this paper, the optimized design and development of the main insulation structure of UHV oil-gas bushing, taking into account processing and installation of transformer outgoing line structure and the GIS electrical connection supporting tooling of the high-voltage combined apparatus, simulating the actual operation environment of the UHV oil-gas bushing with full voltage and full current, and carrying out the long-term performance evaluation test, has good engineering application guidance value.
Preliminary study on Applicability of mine water inflow forecasting method
Authors: Zhang Nan , Wang Daoxi , Li Haobing , Guo Xinwei , Wu Kai , Du Kai
Published: July 2020

The commonly used calculation and prediction methods of mine water inflow in China are divided into deterministic and non-deterministic. Affected by many influencing factors, the applicability of the calculation method has not been reflected, resulting in a large prediction error. By combing the main influencing factors of mine water inflow, The characteristics, advantages, and limitations of evaluation prediction methods, Clarify the selection of the three-stage prediction methods in the exploration phase, well development phase, and mining phase, Establishing a framework for the principles and prediction process framework of mine water inflow forecasting, Achieve precise forecasting and reduce the risk of approval of water resources demonstration by management departments, Helps to turn mine water into waste and improve the management of comprehensive utilization of mine water, Realize the integration of unconventional water resources into the unified allocation of water resources, alleviate the conflict between supply and demand of water resources, and improve the efficiency and utilization efficiency of regional water resources allocation.
Effect of Moisture Content on the Ductility of Cemented Paste Backfill
Authors: Wang Yongyan , Yu Zhuoqun , Cui Lizhuang , Wang Yong
Published: July 2020

The ductility of cemented paste backfill at different moisture content were researched in this paper. The cemented paste backfill specimens at three different moisture content were prepared and the uniaxial compressive tests were conducted. The results show that the compressive strength of specimen decreases with the increase of moisture content. However, the ductility of specimen increases with the increase of moisture content. The elastic modulus and the rate of post peak stress reduction decreases with the increase of moisture content. The obtained results are helpful to better understand the behavior of the cemented paste backfill under different moisture condition, which could provide guidance for safe mining.
Geochemical characteristics and environmental quality assessment of fluorine in soil and water environment of Jinbei
Authors: Huan Jinyao
Published: July 2020

Fluorine is a necessary trace element in humans, lack or excess can adversely affect human health. The geochemical characteristics and environmental quality of fluorine in soil and water environment of Jizhou district in northern Tianjin were studied. The results show: fluorine content in surface soil 201×10-6 ∼8545×10-6, average 757 ×10-6. The average content is the background value of surface soil in Tianjin 1.25 times twice, all over the country 1.58 times twice. In soil vertical profiles, the content of fluorine in clay soil is higher than that in sandy soil. The average groundwater fluorine content in plain area 1.50 mg/L, average mountain area 0.47 mg/L. Plain area is obviously larger than mountainous area. Over the whole district 90% the fluorine content of surface soil showed excess and high level. Proportion of groundwater samples in plain area with fluoride class IV and class V water 61.54%. Fluorine excess ratio in maize samples 26.67%. Maximum excess multiple greater than 2 times twice. Overall, the fluorine content in the surface soil and the groundwater in the plain area of North Tianjin is significantly higher, For high-fluorine areas, the fluorine content of some bulk agricultural products has exceeded the standard. We should pay attention to it.
SWOT analysis of industrial site redevelopment in mining area of Resource-based City -- Taking Pingshuo, Shanxi Province as an example
Authors: Yao Zhen , Yu Qinfei
Published: July 2020

An important problem to be solved in the transformation and development of resource-based cities is the redevelopment and utilization of industrial sites in mining areas. This paper takes Pingshuo Coal Mine as an example, SWOT analysis model is used to analyze the four factors of advantages, disadvantages, opportunities and risks. The result shows that the dominant factors are the existing transportation, electricity, water supply, heating and sewage treatment facilities. The weaknesses are potential pollution risks and difficulties of facility retrofit. The opportunity is brought about by new urbanization and new rural construction. The challenge is how to attract people to the industrial areas with depleted resources.
Characteristics, Challenges and Suggestions of Geological Disaster Prevention and Control in China
Authors: Yao Zhen
Published: July 2020

Geological disasters are prone, predominant and frequent in China; China has become one of the countries with the most sudden geological disasters in the world. China has initially established comprehensive prevention and control system which take investigation and evaluation, monitoring and early warning, treatment and disposal as its core by the end of 2018. There are still many challenges in the prevention and control of geological disasters in China, first, the accuracy of survey and evaluation is obviously insufficient, second, the professional level of group monitoring and prevention needs to be improved, third, the prevention and control of geological disaster and land spatial planning have not been planned as a whole. Four suggestions are put forward: the first is to improve the accuracy of geological survey and evaluation, the second is to improve the monitoring and early warning capacity, the third is to increase the control of land spatial planning, and the fourth is to improve the scientific and technological support capacity.
Study on Rock Mechanics Parameters of Benxi Formation in Yanchang gas field, Ordos Basin
Authors: Zhang Suya , Li Zhenhua
Published: July 2020

Rock mechanics parameters can reflect the brittleness of the formation and determine the effect of reservoir fracturing, and they are very important for improving unconventional oil and gas production. Triaxial compression test and acoustic pulse test are carried out in the sandstone samples of Benxi formation in Yanchang gas field of Ordos basin in order to obtain the accurate mechanical properties of the formation. The static elastic modulus ranges from 23.74 GPa to 32.46 GPa and the static Poisson’s ratio ranges from 0.181 to 0.239 in triaxial compression test. The dynamic elastic modulus ranges from 33.18 GPa to 52.56 GPa and the dynamic Poisson’s ratio ranges from 0.26 to 0.30 in acoustic wave test. It can be seen that the dynamic parameters are generally larger than the static parameters, and the relation between them is Es = 0.3624Ed + 11.865, R2 = 0.8119; μs = 1.243μd - 0.0911, R2 = 0.7267.The relation between dynamic and static rock mechanics parameters provides a reliable parameter basis for the study of mechanical properties, brittleness and fracturing.
Estimation of Rainfall Resource Potential and the Utilization System in the Typical Watershed of China Loess Plateau
Authors: Wu Kai , Gu Jinyi , Yin Huijuan , Li Lingqi
Published: July 2020

As the second longest river in China, the Yellow River is noted for its relatively low water discharge as compared with its huge sediment load. The Xiliu Gully and Heilai Gully, two typical watersheds located in the Inner-Mongolia reach of the upper Yellow River and China Loess Plateau area, is a serious soil erosion and water-deficient region, which belongs to the arid and semi-arid inland basin. In the region, water-consumption mainly depends on rainfall, where there contains grassland, cropland and desert and so on. With the development of economy and society of Eerduosi, the problem of water shortage has become a bottle neck of further development. Based on the hydrogeology features in the Loess Plateau Area, the study proposed the concept of rainfall resource potential, which was composed of surface runoff and soil water. A water yield model based on InVEST (the Integrated Valuation of Ecosystem Services and Tradeoffs) was employed to estimate rainfall resource potential of the two typical watersheds. Based on extensive field research and literature analysis, the process of runoff generation, water enriching and transport was concluded. The highly efficient utilization of rainfall resource in different regions was integrated, which were made of silt trap dams, shallow shaft and ponds. The study provided scientific basis for Spatial Distribution of silt trap dams and high efficient utilization mode of rainfall resource resources.
Study on in-situ stress of heterogeneous shale reservoir
Authors: Zhao Yongfu , Yang Shaochun , Liu Chen , Wu Yupeng , Yang Rui
Published: July 2020

In-situ stress is the important basis for reservoir evaluation. Most of the in-situ stress solutions are based on well logging data and rock mechanics experiments. In fact, according to the actual geological condition, heterogeneity is an important factor affecting shale reservoir recovery. However, the effect of rock heterogeneity on stress is less considered. In this paper, taking well FY1 in block FY1 of Dongying depression as an example, the method of overall mechanical model analysis is used to analyze the in-situ stress of the study area, and the influence of rock heterogeneity on in-situ stress is studied, which reflects the true distribution of in-situ stress in shale reservoir. The research results show that, the minimum horizontal principal stress and the maximum horizontal principal stress increased slightly with the increase of depth, and the vertical stress increases gradually with depth, which is in direct proportion.
The application and ecological profit on the road slope of the palm-mat geotextiles
Authors: Li Chungang , Liu Qiulin , Nie Yi , Xu Ruiping , Yue Chonglun , Wu Bo
Published: July 2020

Soil erosion is one of the world’s most serious environmental problems, causing extensive loss of potentially productive soil and many accidents. The utilization of plant-mat geotextiles for the remediation of the soil erosion has attracted much attention in recent years. The plant-mat geotextiles showed better performance on water and soil conservation than most of other plant-mat geotextiles, the application status of palm-mat geotextiles in the main fields of slope protection, sand fixation and vegetation restoration was summarized. Moreover, the ecological profit on the road slope of the palm-mat geotextiles was also reviewed. The summary results of the existing researches indicate that plant-mat geotextiles is an effective soil conservation strategy with promising application prospect and ecological profit.
Research on the Status and Development of Cultivated Land Quality Inspection Technology System
Authors: Xiong Yufei , Li Yanan
Published: July 2020

The quality inspection of arable land plays an important role in agriculture and is the premise for evaluating the quality of arable land. In recent years, with the country’s emphasis on agricultural work and the continuous development of arable land quality inspection technology, China has gradually established an arable land quality inspection system. The development of agriculture has produced a greater impetus. Cultivated land quality inspection technology and management are the basis for the development of the industry. This article systematically discusses the development status and existing problems of arable land quality inspection, and points out corresponding countermeasures and methods to promote the further development of arable land quality inspection.
Quantitative Impact and Research on Water Supply Management and Demand in Beijing under the WEAP Model
Authors: Yang Liu , Hao Meng , Cao Qingyi , Liu Keling , Xiao Liangpeng , Pei Lin , Wu Xiaoshi
Published: July 2020

Predicting the future water supply and demand is an important basis for achieving optimal water resource allocation and serves as an effective methodology to solve the imbalances between water supply and demand in cities and achieve long-term stable supply and efficient water resource utilization. In this study, we use the water evaluation and planning (WEAP) model to quantitatively analyze the effects of the water resource policies on the balance between the supply and demand of water resources in Beijing and predict the water demand and shortages in Beijing from 2019 to 2035. The simulation results indicate that at the watershed scale, different levels of water shortage can be observed in the five major watersheds under different scenarios. By 2035, the unmet demand in the Beiyunhe river basin will be the most serious, accounting for ⩾45.48% of the total unmet demand. The policy constraints play a crucial role in alleviating the supply-and-demand imbalance of water resources. Different policies can be used to reduce the total water demand; however, the population growth control policies exhibit the greatest effect on the alleviation of water resource shortage in Beijing and can reduce the water demand by 3.42 million m3 when compared with that in a scenario without any control policy. The results of this study can provide important references to solve the urban water resource supply and demand imbalances and realize rational allocation of the water resources.
Research on Image Processing of Signal-to-Noise Ratio and Resolution Based on Seismic Profile
Authors: Li Jie
Published: July 2020

In view of the characteristics of low frequency of seismic data coverage, strong surface interference, low signal-to-noise ratio and low resolution, this paper studies a set of pre-stack combined denoising technology, adaptive predictive deconvolution technology, anisotropic motion Correction and high-precision speed analysis, Kirchhoff restack time migration imaging and other key technologies are the core processing methods. The layer-by-layer similarity learning method is used to reconstruct high-resolution images, especially when the image is enlarged, it can still be clearer. Restore the detailed features of the texture of the seismic profile image. The actual profile test shows that the quality of image reconstruction has been improved, and good results have been obtained in terms of visual effects and peak signal-to-noise ratio.
A gas well inspection automation system based on IoT perception technology
Authors: Li Yulong , Yang Fan , Guo Huijie
Published: July 2020

This article analyzes the problems faced by the daily safety inspection and emergency repair of gas shafts operation. Corresponding countermeasures are put forward for each problem faced. These countermeasures are combined into a gas well inspection automation system using mature IoT perception and communication technologies. This system realizes all-round management and control of gas operation site safety. It is of great significance to the intelligent construction of the gas industry.
Distribution Characteristics and Enrichment Factor Gallium in Coal Seam No.4 in Majialiang-Fangziping area, Fugu mining area
Authors: Wang Wenbo , Wang Hui , Fan Yuhai , Bao Zhihong , Pan Chunjuan
Published: July 2020

Based on the latest exploration data in the study area, the distribution of gallium in the 4 coal seams in Majialiang Fangping area of Fugu mining area and its geological influencing factors are analyzed. The results show that the weighted average mass fraction of gallium is 18 μg/g, which is 1-4 times higher than the global average. The yield of ash and the content of SiO2 and Al2O3 in coal ash are positively correlated with the content of gallium in coal. The content of total sulfur, organic sulfur, Fe2O3 in coal ash and the index of ash composition have negative correlation with the content of gallium in coal. These characteristics indicate that the mineral carrier of gallium in coal is mainly clay mineral, and the peat swamp with strong hydrodynamic force and weak reducibility may be conducive to the enrichment of gallium in coal.
Study on automatic recognition method of continental shale lamination based on electrical imaging logging
Authors: Wang Min , Lai Fuqiang , Fu Aibing , Hu Xingzhong , Zhong Lulu , Zhang Guotong
Published: July 2020

In this paper, the shale oil shale stratum in Jiyang Depression is taken as the object to study the characteristics of the complex shale lithology, the frequent development of calcareous or sandy stratum, and the difficulty of manual identification. Firstly, the development characteristics of the stratigraphic layer of continental shale oil reservoir are studied. Then the electric imaging logging image is processed to restore the whole borehole wall, and then the target geological object is extracted through the operations of automatic image segmentation, connected area labeling, area contour tracking extraction and storage. Finally, the target geological objects are automatically classified and identified, the location of the continental shale texture layer is predicted, and the texture layer development index is calculated. The research results show that: after verification analysis with the core description, this method can identify the texture layer more accurately, and the coincidence rate reaches 92%. It provides support for the identification of stratigraphic facies favorable for reservoir development in the study area, and also lays a foundation for shale oil layer selection and fracturing.
Performance Analysis of Cumulative Sum Control Charts Based on Parameter Estimation
Authors: Chen Dongyang , Liu Xiaokang , Yang Hang
Published: July 2020

As an important means of quality monitoring, Cumulative Sum (CUSUM) control charts can quickly detect whether the production process is out of control. However, in the actual production process, the parameters required for the control chart-the overall mean and standard deviation are usually unknown, so it needs to be accurately estimated. This paper uses multiple estimators to estimate the mean and variance of the population by using samples in phase I. When the testing process in phase II is out of control, this paper analyzes the influence of each estimator combination on the cumulative sum control chart based on running length distribution of control charts. This paper comprehensively analyzes the average, standard deviation and percentile of the control chart running length in four different environments in order to find the parameter combination that optimizes the control chart performance. The research results show that the CUSUM control chart based on

X

¯

¯

−

σ

^

p
o
o
l
e
d

and

W
H

¯

−

σ

^

H
o
z
o

estimators performs best in a non-polluted environment, while the control chart based on

X

¯

¯

−

σ

^

I
Q
R

and

W
H

¯

−

σ

^

I
Q
R

estimators performs best in a polluted environment.
Evaluation of cultivability of reclaimed soil in hollow villages in mountainous and hilly areas
Authors: Lei Na , Liu Zhe , Dong Qiguang
Published: July 2020

Reclaimed soil in hollow villages can be used to supplement cultivated land resources. In this study, reclaimed soil in hollow villages in Chengcheng County was selected as research object, and a combination of field investigation and indoor analysis was used to evaluate the cultivability of the reclaimed soil. Specific indicators for evaluation were borrowed soil thickness, Physical and chemical properties of soil, design of piece of farmland, crop growth indicators, convenience of farming, irrigation conditions, the mechanization degree. The research results have important reference significance for evaluating the quality and cultivability of the reclaimed soil.
Meteorological risk identification and assessment of offshore wind farms
Authors: Jiao Xue , Xing Hongyan , Zhang Qilin , Zhou Junchi
Published: July 2020

During the construction and operation period, an offshore wind farm is exposed to a variety of meteorological threats, which could lead to severe damages and massive financial loss. In this work, we analyse meteorological risks of offshore wind farms in the coastal areas of the south-east Jiangsu Province. Firstly, we identified the risk factors through the Delphi Method and analysis of historical data. The five major risks include typhoon, lightning, extreme temperatures, salt frog, and oceanic disasters caused directly by meteorological disasters. Then, using the Analytic Hierarchy Process (AHP), we established index module of each layer and calculated the risk value of each influence factor. After that, we established the judgement matrix and the weight of each factor. Based on that, we got the comprehensive risk value and considered it as a medium risk. According to the weighting module, we also came to the conclusion that typhoon contributes most to the meteorological disaster of offshore wind farms, with a weight of 0.3937.
Research on Environmental Green Ecological Technology Based on Agricultural Pollution in Yunnan
Authors: Tang Jinli
Published: July 2020

This article constructs a multi-dimensional and multi-agent participation model for agricultural environmental pollution from the perspective of interest-related theory, and uses Yunnan Province as an example to fully explain this problem. With the help of literature analysis and statistical analysis, based on a comprehensive understanding of domestic and foreign agricultural environmental pollution and governance issues, relevant stakeholder theories and the state of agricultural environment in Yunnan Province, based on the theory of stakeholder theory, a government, Eco-environmental engineering aims to protect, improve and continuously use the existing ecological resources, thereby promoting the coordinated development of ecology, economy and society. Based on this, by exploring the impact of ecological and environmental engineering on agriculture in terms of natural resources, environment, economy, society, and science and technology, the agricultural ecological balance is transformed and constructed to achieve the purpose of promoting sustainable agricultural development.
Research on Application of Environmental Protection Dredging Construction Technology in Environmentally Sensitive Areas
Authors: Hu Shenghua , Shi Shile , Xue Qiang , Wang Yisen
Published: July 2020

At present, there are few cases about the implementation of environmental protection dredging project in China’s environmentally sensitive areas, and there is a serious lack of relevant project implementation experience. This paper combines the basic characteristics of environmental dredging in environmentally sensitive areas, and takes Xiangyang City’s moat dredging project as an example to analyze the difficulties in the implementation of the project, mainly including the control of construction impact, compliance with schedule, prevention of secondary pollution, and sludge. In order to solve these problems, the project mainly adopts targeted measures to minimize the impact of project construction; in order to realize the scheduled implementation of the sludge disposal mode using 6000m3 of daily dredging and dredging combined with the industrialization mode; The project successfully prevented potential secondary pollution risks during construction through the use of environmentally friendly cutter heads, integrated ultra-magnetic separation equipment and specialized sludge conditioning agents; finally, the combined use of soil improvement soil outside the mud cake and landfill for external transportation successfully solved the silt digestion problem of the project. At the same time, through the pilot test of sludge resource utilization, two major soils for mud cake production engineering and landscaping were developed Process products lay a solid foundation for the multi-channel comprehensive utilization of sludge.
Pollution Characteristics and Comprehensive Evaluation of Soil Organic Compounds at a Chemical Contaminated Site
Authors: Wei Yulu , Wang Luyao
Published: July 2020

Urban soil is one of the main components of urban ecosystem. Taking organic pollution in a chemical plant after relocation as the research object, which is left behind by a chemical plant after relocation, 13 deep soil samples were collected. According to the requirements of “Soil environmental quality Risk control standard for soil contamination of development land” (GB36600-2018), 43 organic contents were tested and analyzed. Mass ratio statistical analysis, single pollution index method and Nemerow synthetic evaluation index were used to analyze the organic pollution in the site. Results show that chloroform, benzene, trichloroethylene (TCE), 1,2-dichloropropane and 1,2,3-trichloropropane were significantly enriched in the reactor and the sewage pool, and the pollution depth was up to 10m. This shows that the chemical plant has a great impact on the site, and there may be leakage or stolen discharge, which is also an important source of soil organic pollution in this area, so detailed monitoring and remediation work should be carried out in the later stage.
Rural Construction and Ecological Environment Optimization in Northwest China Based on Sustainability
Authors: Liu Siqi , Huang Guanqi
Published: July 2020

With the rapid development of rural urbanization, rural areas, especially in northwest China, have been exposed many problems. Living quality cannot be guaranteed. Environmental quality is deteriorating. Rural development has encountered the unprecedented problems and challenges. Under the background of the integration of urban and rural areas, the development of rural areas is also in a dilemma. In this research, based on the actual situation of Guanzhong region in Shaanxi Province, the rural villages are classified according to their resources, environment and formation time. At the same time, combined with previous literature, a group of villages has been selected as object to conduct on-site investigation and analysis including ecological environment, planning layout, public space, building energy saving and so on. Hopefully, the analysis of physical formation can makes people have a more in-depth understanding of sustainability. We are going to understand the problems encountered and solutions related in the sustainable development of rural areas from a critical perspective. By putting forward the corresponding strategies and development focus, a set of multiple sustainable development model for different types of villages has been summarized and proposed. Importantly, it can be some enlightenments for further studies.
Study on Microclimate Improvement in Urban Fringe based on Human Comfort--Taking Shichuan River as an Example
Authors: Liu Siqi , Peng Biao
Published: July 2020

In the context of rapid urbanization, the development of cities has produced many environmental problems. The social structure of urban fringe is complex and the environment is deteriorating. In recent years, urban environment improvement activities have been carried out all over in China, improving the quality of ecological environment and residents’ happiness. Taking Shichuan River, Fuping County, Shaanxi Province as an example, this study researches the methods and strategies used in the environmental improvement project of Shichuan River were integrated and analysed, and improves the quality of ecological environment through engineering and technical measures. In this study, by setting different data collection points, the humidity of sampling points at different distances around the Shichuan river was analyzed; the wind speed and other data of the study area were collected, and the regional wind environment was simulated by 3D modelling. The microclimate of the Shichuan river is evaluated by the methods of qualitative and quantitative analysis. This study aims at emphasizing the importance of ecological construction. It provides a positive reference for the improvement of ecological environment in the urban fringe of Northwest China
Study on Long-term Operating Mechanism of Rural Drinking Water Projects in Southwest Mountainous Areas
Authors: Dai Chunyao , Min Zhihua , Zhang Junhong
Published: July 2020

The rural drinking water project is an important manifestation of building a new socialist countryside and a policy of benefiting the farmers to improve the quality of life. However, there are many problems in the operation and management of rural drinking water projects, including incomplete management systems, inadequate drinking water quality, and unreasonable collection of water charges. These problems are not conducive to the long-term operation of drinking water projects. This article proposes the corresponding management measures aiming at the above problems in the operation and management of rural drinking water projects.
China’s sewage treatment industry status quo and improvement measures
Authors: Fu Jianru
Published: July 2020

Sewage treatment has greatly affected the promotion and implementation of China’s sustainable development policies. At this stage, urban domestic and industrial wastewater discharge has become the main source of pollution for urban water resources in China. Urban domestic and industrial wastewater treatment is the top priority for saving water resources and protecting urban water bodies both now and in the future. This article analyzes the current status of China’s sewage treatment from three aspects: policy, process, and industry operation status. It finds problems in China’s sewage treatment, and puts forward reasonable suggestions.