bluuebunny/crossref_metadata_2025_split huggingface dataset:
Lessons Learned from Stimulation of Dibei Tight Gas Reservoir with Strong Heterogeneity in Tarim Basin
Authors: Fan Wentong , Wang Liao , Huang Longcang , Li Suzhen , Liu Jiangyu , Zhai Wen 
Published: November 2019

Abstract
The Dibei gas field is a naturally fractured tight sandstone gas reservoir in the Tarim Basin, West China. It is characterized by large depth (4600–5200 m), huge thickness (100–200 m), low abundance, low matrix permeability, high pressure (80–95 MPa), high temperature (140 – 150°C) and strong heterogeneity. Different stimulation techniques were applied to improve well production. For the wells with good development of natural fractures, matrix acidizing, acid fracturing or conventional hydraulic fracturing is used. For the wells with low fracture density and huge thickness, separate-layer acid-fracturing, massive separate-layer hybrid fracturing or composite diverting agent is applied to improve stimulation efficiency. The low-damage high-temperature weighted fracturing fluids are used to reduce the effect of reservoir sensitivity and the treatment pressure, and high-strength proppant is used at the same time to keep high fracture conductivity. Meanwhile, large-diameter fracturing string with 3-1/2″ and 4-1/2″ connections is used to decrease pump pressure and increase pump rate. The above technologies were applied in more than twenty treatments in seven wells, of which more than half witnessed production increase. The matrix acidizing or conventional hydraulic fracturing is well performed for the wells with natural fractures, but inefficient for the extremely tight gas wells. In Well A without fractures, the massive separate-layer hybrid fracturing was used. In the treatment, a total of 1,328 m3 fracturing fluid was used, with 50 m3 proppant; the pump rate was 8 m3/min and the maximum pump pressure was 92 MPa. Unfortunately, the post-frac production was not as expected, mainly due to the damage of killing well. In Well B with fractures, high gas production was achieved by acid fracturing, but the gas rate dropped from 258,000 m3 to 51,000 m3 after killing well, and the gas rate never recovered even by acid fracturing, hydraulic fracturing and relieving damage with methanol. The development of natural fractures is the key controlling factor for gas production. Well C, less than 800 m from well B, The development of natural fractures is quite different from Well B, and 98,000 m3 gas rate was acquired after hydraulic fracturing with more than 1,000 m3 low damage high-temperature weighted fracturing fluid and 30 m3 proppant. The development of natural fractures is the key controlling factor for gas production and killing well damage is the fatal blow to the gas production, so the stimulation techniques and working fluid system should be prudently optimized.
Remote Sensing Image Dehazing Algorithm Based on Wavelet Coefficient Weighting
Authors: Jin Jianglei , Yan Haowen 
Published: November 2019

Abstract
This paper introduces the principle of the defogging algorithm and the steps of the algorithm implementation. According to the simulated image and result, the data is recorded, and the wavelet coefficient weighting is applied to evaluate the effect of remote sensing image de-clouding. Compared with the homomorphic filtering algorithm and Retinex algorithm, the wavelet coefficient weighting is applied to the remote sensing image. The effect of cloud treatment is very good.
Mine Fire Prediction Based on WEKA Data Mining
Authors: Wang Xin , Hao Jian , Chen Jun , Cheng Weijia 
Published: November 2019

Abstract
Mine fires are prone to cause catastrophic accidents such as gas accidents and coal dust explosions in gas-exposed coal mines, which seriously threaten the safe production of mining enterprises. In order to effectively reduce the probability of gas explosion in mines, an accurate prediction of possible fire hazards in Linhua Coal Mine is made: collecting data on fire occurrence indicators; using Weka software on the basis of rough set theory, selecting SVM classifier, BP neural network and J48 decision tree to obtain the accuracy of the samples to be tested; analyzing the detailed accuracy, confusion matrix and node error rate, and obtain the optimal algorithm. On this basis, a mine fire predictive control model is proposed to determine and control the hazard grade of mine fire source and effectively reduce the probability of coal mine fire occurrence. The establishment of this model greatly ensures the safe production of gas outburst mine.
Evaluation Research on the Impacts of Coal Industry Development on Ecological Security in Inner Mongolia
Authors: Li Li , Chen Jiabin , Yan Dan 
Published: November 2019

Abstract
The paper uses PSR model to evaluate the ecological security situation from three dimensions of stress, state and response. The results show the level of economic development, social harmony and the realization of low-carbon ecological integrated Systems in Inner Mongolia is -0.03373, 0.053565, and 0.117664. The development degree, development continuity, development coordination degree and development effectiveness of low carbon ecological area construction in Inner Mongolia are 0.13361, 1.656154, 57.98879, 0.01741. The evaluation result of the sustainability of low carbon ecological development in Inner Mongolia is in the fourth level. The degree of development coordination and development effectiveness are judged at level five. Through the evaluation and grading results of low carbon ecological development in Inner Mongolia, we know that Inner Mongolia, as a coal resource-based region, is under great pressure to develop low-carbon ecology.
Study on Corrosion Prevention and Treatment in Long-Distance Oil and Gas Pipeline
Authors: Bai Xiaoqian , Zhao Yu , Xu Lu 
Published: November 2019

Abstract
The use of oil pipelines has become increasingly prominent. The corrosion of buried pipelines seriously affects their service life and quality of oil transported, and even causes leakage and pollution of the environment. Through the analysis of the corrosion mechanism of metal pipeline, this paper understands the causes of corrosion and puts forward effective protection measures.
A Study on Counterintuitive Behavior of Clamped Square Plates under Blast Loading
Authors: Chen Yan , Lin Yuliang , Li Xiangyu , Zhang Yuwu 
Published: November 2019

Abstract
In order to study the counterintuitive behaviour of the clamped square plates under blast loading, numerical simulation and experimental research were carried out on the clamped square aluminium plate. The finite element software is used to simulate the dynamic response of plate under the blast loading. It is found that the counterintuitive behaviour occurred only under the condition when the overpressure is low and the positive pressure time is short. And this deformation mode occurred between elastic deformation and large plastic deformation. The explosion tests were carried out to obtain the counterintuitive behaviour of plates, and the range of the explosion load which caused the counterintuitive behaviour was clarified.
Experimental Study on Glass Sand Well
Authors: Wang Fengchi , Nie Xiaomei , Zhou Jinghai , Kang Tianbei 
Published: November 2019

Abstract
Aiming at the disposal of waste glass, our paper proposes a method of filling sand wells with glass sand formed by mixing waste glass and sand as a backfill material. In this paper, the basic properties of glass sand are studied by penetration test, consolidation test and consolidation bearing capacity test. The results show that the permeability of mixture is better than that of common sand well when glass particles are incorporated into sand. When bearing the same bearing capacity, the average bearing capacity of common sand well is smaller than sand well, and the bearing capacity of the soil in the upper part of the model box is greater than the bearing capacity of the lower soil. The sedimentation of clay with sand well is higher than that of common clay. Glass sand well can accelerate the consolidation of soil in soft soil foundation by utilizing the good permeability of glass and sand.
Establishment and Application Demonstration of Standards for Agricultural Biogas Slurry Returning to Field in Citrus Orchard
Authors: Lan Tao , Xiong Diwen , Chu Qiao , Feng Yang , Kou Linling , Dou Wei , Zhou Xianwen , Deng Shengxing 
Published: November 2019

Abstract
In this paper, we take citrus orchard as target, evaluate the safety of agricultural biogas slurry by comparing the properties of unfermented manure and biogas slurry from 27 farms in Chongqing. The results indicate that the amount of harmful heavy metal element in biogas slurry completely meets the requirements in China agricultural standards “Biogas Fertilizer” (NY/T 2596) and “Organic Fertilizer” (NY 525), indicating the biogas slurry is safe to use as fertilizer. These results provide data support in formulating a stricter standard about the limitations of harmful heavy metal containment ratio in biogas slurry. Biogas slurry can replace chemical fertilizer partly, and can be popularized as a good new type of liquid fertilizer. A certain amount of biogas slurry irrigation can basically meet the supply of nitrogen and phosphorus nutrition, and zero use of chemical fertilizer (nitrogen and phosphorus) come true. However, the content of biogas slurry varies greatly, the measurement of fertilizer efficiency is complex, and it cannot meet the balanced supply of all mineral nutrients, which will lead to the imbalance of nutrient abundance and deficiency. The nutritional diagnosis should be used to monitor the nutritional level of trees, guide the control of abundance and deficiency, enhance the efficiency of citrus orchards to absorb the effective elements of biogas slurry, and improve the yield and quality of citrus. Through monitoring the runoff quality of the orchard returned with biogas slurry, it is found that the runoff quality of the orchard is inferior V. Total phosphorus and granular phosphorus are the main contaminating sources of the outflow runoff in orchard. This indicates that the problems of nitrogen and phosphorus pollution need to be prevented and controlled in the process of returning the biogas slurry to the orchard. It is necessary to establish the landscape system of fruit grass in the orchard and the interception system of flood interception ditches, sediment pockets and buffer ponds in order to sand, retention and reduction of particulate phosphorus. Based on this, a bunch of agricultural biogas slurry returning technology model suitable for modern ecological citrus orchard planting was summarized. The technical standards for biogas slurry harmlessly returning to citrus orchard and technical specification for formula fertilization of citrus nutrition diagnosis, were formed. It has been applied on a large scale in Chongqing three gorges reservoir area and national modern eco-agricultural demonstration base, and has achieved remarkable socio-economic and ecological environmental benefits. The results of this study provide data and technical support for the formulation of two new national standards of "Agricultural Biogas Slurry" and "Technical Specification for Harmless Treatment of Agricultural Biogas Slurry".
Construction Techniques for Strengthening of Dongming Yellow River Road Bridge by the Cable-Stayed System
Authors: Xu Gangnian , Wang Laiyong , Wu Junyan , Zhang Jianjuan 
Published: November 2019

Abstract
The Dongming Yellow River Highway Bridge (75+7×120+75 m), is a large span prestressed concrete rigid frame and continuous combination beam bridge, which was the first bridge strengthened by cable-stayed system in China. Using towers and stay cable system, the main bridge was transformed to provide vertical support with superstructure. For the foundation reconstruction, bored piles were constructed as new pile foundations on both sides of the original pile foundations. After cofferdam pumping, to ensure the positioning of the protective tubes, the reinforcing bars, concrete cover and concrete piles left in the river bed were removed by using brush drilling rigs, long arm digging machines and frogmen, while the "U-tube" method was used to grout at the bottom of the piles. The diamond wire saw cutting technology was adopted to complete the transformation of the old caps and insert shear nails. Using the post-pouring strip temporary shields, the new caps and old caps were connected until the tensioning of the cables was finished. To ascertain the arrangement of the reinforcement on the floor and the prestressed reinforcement, and then stick the positioning plates on the floors, bonded rebars holes were drilled utilizing the hydraulic core drill that was made. The joists and the brackets are manufactured by the factory and assembled in the construction site. Gantry cranes and angle fine-tuning devices were used to install the joists and brackets, and then the connecting bolts were inserted. Concurrently, material was transported through the hole in the roof of the middle-span, and the steel supports within the box were installed. From the middle towers to the side towers, from the short cables to the long cables, cables were tensioned by batches and levels with constant monitoring throughout the whole process of this tensioning construction. Finally, the external prestressed strands inside the box were adjusted and the bridge deck construction was completed.
Research on Application of Centrifugal Circulating Fluidized Bed in Tin Mud Ore Separation
Authors: Li Huiping , Chen Wenping 
Published: November 2019

Abstract
Tin mud ore separation is always the key to improve the utilization of tin resources. In view of the tin mud ore in Gejiu Yunnan province, the circulating fluidized bed is used for preconcentration. And reasonable separation parameters were determined based on the ore properties. When the tin grade in the feed is 0.3%, we can obtain the rough concentrate whose tin grade is 0.492% and recovery is 67.35%, and 60% of ore as tailings can be discarded. Then desulfurization and flotation was used, and YP-6 as collector, P86 as auxiliary collector and oxalic acid as regulator, a tin concentrate with grade of 4.38% and recovery of 77.18% was obtained by closed circuit test. The tin recovery of original mud ore was 51.02%, and the separation effect was improved.
Application Research on Soil and Water Environmental Pollution Remediation Technology
Authors: Yan Li , Zhao Wang 
Published: November 2019

Abstract
With the continuous acceleration of economic development, the scale of industrialization in China has been expanding, and a large amount of industrial wastewater has been discharged into the soil, resulting in serious heavy metal pollution in soil and water sources. The paper summarizes the physical repair technology, chemical repair technology and bioremediation technology of heavy metals and organic pollutants in water and soil, and analyzes the applicable conditions and influencing factors of various repair technologies. The results provide reference for the selection of site water and soil pollution remediation technology, and provide a theoretical basis for the development of the industry.
Study on Clear Water Acidic Fracturing Increasing Injection Technology in Sandstone Oilfield
Authors: Na Cha 
Published: November 2019

Abstract
In view of the fact that it is difficult for some water injection wells in low permeability oilfields to absorb water and the general effect of conventional measures to increase injection, clean water acid fracturing technology research and field test of sandstone in low permeability reservoirs have been carried out. On the basis of fully investigating the adaptability of acid fracturing in sandstone reservoirs and combining with the actual development of low permeability oilfields in our factory, the technology of clear water fracturing and balanced acid fracturing is organically combined. After a lot of theoretical calculation, the construction parameters are optimized, and the suitable fracturing technology is optimized, which greatly reduces the requirements of surface construction equipment. At the same time, through indoor experiments, the suitable well entry fluids are screened to ensure the construction effect. At present, the technology has been tested in 6 wells and achieved good injection increase effect.
Investigation of Caryota urens fibers on physical, chemical, mechanical and tribological properties for brake pad applications
Authors: Sai Krishnan G , Ganesh Babu L , Kumaran P , Yoganjaneyulu G , Sudhan Raj Jeganmohan 
Published: November 2019

Abstract
The idealization of this research work is to extend the utilization of the naturally available fibers as a key ingredient in the development of a non-asbestos free brake pad. The fibers used in this work are Caryota urens, which is found all over the Asian regions and abundantly available. The compression molding machine was used to develop the non-asbestos free brake pad. The fibers were added in weight percentages of 5, 10 and 15. The various physical, chemical, and mechanical properties were evaluated. Chase test rig was used to evaluate the tribological properties. The combination of Caryota urens fiber with the barytes had a more significant influence on the tribological properties. The brake pad composites with ten weight percent of Caryota urens fibers based brake pads possessed a good coefficient of friction values with less fade values and less fluctuations. Increasing the weight percentage of Caryota urens fibers in the brake pad formulation had a decreasing trend in the wear performance but increased recovery properties.
Empathy and Its Alternatives: Deconstructing the Rhetoric of “Empathy” in Video Games
Authors: Ruberg Bonnie 
Published: November 2019

AbstractThis article analyzes the contemporary discourse that surrounds video games. Specifically, it confronts the rhetoric of “empathy,” which has become a buzzword in North American industry, academic, education, and media conversations about video games and their supposed power to place players into others’ shoes—especially those games created by queer or otherwise marginalized people. Scholars like Wendy Chun and Teddy Pozo and game designers like Robert Yang have spoken out against this rhetoric. Building from their writing, as well as critiques from the creators of queer independent games commonly mislabeled as “empathy games,” this article delineates the discriminatory implications of the term. Rather than simply dismissing “empathy,” however, this article unpacks it, turning to textual artifacts like news stories and industry presentations, as well as the 2016 video game Unravel (ColdWood Interactive), to deconstruct the term’s many meanings and to identity alternative (queerer) models of affective engagement with video games.
Diagnostic accuracy of administrative codes for autosomal dominant polycystic kidney disease in clinic patients with cystic kidney disease
Authors: Kalatharan Vinusha , McArthur Eric , Nash Danielle M , Welk Blayne , Sarma Sisira , Garg Amit X , Pei York 
Published: November 2019

Abstract

Background
The ability to identify patients with autosomal dominant polycystic kidney disease (ADPKD) and distinguish them from patients with similar conditions in healthcare administrative databases is uncertain. We aimed to measure the sensitivity and specificity of different ADPKD administrative coding algorithms in a clinic population with non-ADPKD and ADPKD kidney cystic disease.

Methods
We used a dataset of all patients who attended a hereditary kidney disease clinic in Toronto, Ontario, Canada between 1 January 2010 and 23 December 2014. This dataset included patients who met our reference standard definition of ADPKD or other cystic kidney disease. We linked this dataset to healthcare databases in Ontario. We developed eight algorithms to identify ADPKD using the International Classification of Diseases, 10th Revision (ICD-10) codes and provincial diagnostic billing codes. A patient was considered algorithm positive if any one of the codes in the algorithm appeared at least once between 1 April 2002 and 31 March 2015.

Results
The ICD-10 coding algorithm had a sensitivity of 33.7% [95% confidence interval (CI) 30.0–37.7] and a specificity of 86.2% (95% CI 75.7–92.5) for the identification of ADPKD. The provincial diagnostic billing code had a sensitivity of 91.1% (95% CI 88.5–93.1) and a specificity of 10.8% (95% CI 5.3–20.6).

Conclusions
ICD-10 coding may be useful to identify patients with a high chance of having ADPKD but fail to identify many patients with ADPKD. Provincial diagnosis billing codes identified most patients with ADPKD and also with other types of cystic kidney disease.
Assembly of the 373k gene space of the polyploid sugarcane genome reveals reservoirs of functional diversity in the world's leading biomass crop
Authors: Souza Glaucia Mendes , Van Sluys Marie-Anne , Lembke Carolina Gimiliani , Lee Hayan , Margarido Gabriel Rodrigues Alves , Hotta Carlos Takeshi , Gaiarsa Jonas Weissmann , Diniz Augusto Lima , Oliveira Mauro de Medeiros , Ferreira Sávio de Siqueira , Nishiyama Milton Yutaka , ten-Caten Felipe , Ragagnin Geovani Tolfo , Andrade Pablo de Morais , de Souza Robson Francisco , Nicastro Gianlucca Gonçalves , Pandya Ravi , Kim Changsoo , Guo Hui , Durham Alan Mitchell , Carneiro Monalisa Sampaio , Zhang Jisen , Zhang Xingtan , Zhang Qing , Ming Ray , Schatz Michael C , Davidson Bob , Paterson Andrew H , Heckerman David 
Published: November 2019

ABSTRACT

Background
Sugarcane cultivars are polyploid interspecific hybrids of giant genomes, typically with 10–13 sets of chromosomes from 2 Saccharum species. The ploidy, hybridity, and size of the genome, estimated to have &gt;10 Gb, pose a challenge for sequencing.

Results
Here we present a gene space assembly of SP80-3280, including 373,869 putative genes and their potential regulatory regions. The alignment of single-copy genes in diploid grasses to the putative genes indicates that we could resolve 2–6 (up to 15) putative homo(eo)logs that are 99.1% identical within their coding sequences. Dissimilarities increase in their regulatory regions, and gene promoter analysis shows differences in regulatory elements within gene families that are expressed in a species-specific manner. We exemplify these differences for sucrose synthase (SuSy) and phenylalanine ammonia-lyase (PAL), 2 gene families central to carbon partitioning. SP80-3280 has particular regulatory elements involved in sucrose synthesis not found in the ancestor Saccharum spontaneum. PAL regulatory elements are found in co-expressed genes related to fiber synthesis within gene networks defined during plant growth and maturation. Comparison with sorghum reveals predominantly bi-allelic variations in sugarcane, consistent with the formation of 2 “subgenomes” after their divergence ~3.8–4.6 million years ago and reveals single-nucleotide variants that may underlie their differences.

Conclusions
This assembly represents a large step towards a whole-genome assembly of a commercial sugarcane cultivar. It includes a rich diversity of genes and homo(eo)logous resolution for a representative fraction of the gene space, relevant to improve biomass and food production.
Volume Growth of Complete Submanifolds in Gradient Ricci Solitons with Bounded Weighted Mean Curvature
Authors: Cheng Xu , Vieira Matheus , Zhou Detang 
Published: November 2019

Abstract
In this article, we study properly immersed complete noncompact submanifolds in a complete shrinking gradient Ricci soliton with weighted mean curvature vector bounded in norm. We prove that such a submanifold must have polynomial volume growth under some mild assumption on the potential function. On the other hand, if the ambient manifold is of bounded geometry, we prove that such a submanifold must have at least linear volume growth. In particular, we show that a properly immersed complete noncompact hypersurface in the Euclidean space with bounded Gaussian weighted mean curvature must have polynomial volume growth and at least linear volume growth.