Pub Date : 2017-01-01DOI: 10.12783/issn.1544-8053/14/1/3
Yating Wang, Lihong He, Guanglei Zhao
Lime sludge is commonly generated from the pulping waste liquor in alkali recovery of paper industry. It would cause a significant decrease in the alkyl ketene dimer (AKD) sizing efficiency as used to be the filler for cellulosic fiber networks paper. In the present work, Polyamide-Polyamine-Epichlorohydrin (PAE), Polyetherimide (PEI) and chitosan were used as sizing promoters for addressing the above issue. Results showed that the sizing degree of paper filled with 26% lime sludge could be increased by 83.4%, 68.9% and 49.7%, respectively, at the optimal dosage of PAE, PEI and chitosan. Curing time and curing temperature also had significant impacts on the efficiency of the three sizing promoters. All the three sizing promoters could remove the anionic trash in the wet end. Moreover, PAE could promote the reaction between AKD particles and cellulosic fibers.
{"title":"Synergetic Effect of Cationic Polymers on Water Repellency of Cellulosic Fiber Network Paper Filled with Waste Lime Sludge","authors":"Yating Wang, Lihong He, Guanglei Zhao","doi":"10.12783/issn.1544-8053/14/1/3","DOIUrl":"https://doi.org/10.12783/issn.1544-8053/14/1/3","url":null,"abstract":"Lime sludge is commonly generated from the pulping waste liquor in alkali recovery of paper industry. It would cause a significant decrease in the alkyl ketene dimer (AKD) sizing efficiency as used to be the filler for cellulosic fiber networks paper. In the present work, Polyamide-Polyamine-Epichlorohydrin (PAE), Polyetherimide (PEI) and chitosan were used as sizing promoters for addressing the above issue. Results showed that the sizing degree of paper filled with 26% lime sludge could be increased by 83.4%, 68.9% and 49.7%, respectively, at the optimal dosage of PAE, PEI and chitosan. Curing time and curing temperature also had significant impacts on the efficiency of the three sizing promoters. All the three sizing promoters could remove the anionic trash in the wet end. Moreover, PAE could promote the reaction between AKD particles and cellulosic fibers.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"28 1","pages":"19-25"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73190254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/1/11
Xiao Xinhuan, Shu Shi Xia Cheng Wang Gang Bai Yunlong Xu Chuchu, Wu Ling
Copper (Cu) is an important microelement for the maintenance of normal metabolism of dairy cows and a variety of enzymic composition. When Cu deficiency is occurred in dairy cows, it’ll be accompanied by many diseases. The main objective of the present study was to explore the correlation between Cu deficiency and oxidative stress of lactating dairy cows and evaluate early-warning index for Cu deficiency. There were divided into two groups based on serum Cu levels: a Cu deficiency group and a control group. Serum levels of ceruloplasmin (CP), superoxide dismutase (SOD), total antioxidant capacity (T-AOC), glutathione peroxidase (GSH-PX), and Cu were analysed. The results showed that CP levels in the Cu deficiency group were significantly lower than in the control group, while T-AOC levels were significantly higher, but there were no significant differences between SOD and GSH-PX levels. Pearson correlation analysis showed that serum CP levels were very significantly positively correlated with Cu deficiency, while serum T-AOC levels were very significantly negatively correlated and SOD and GSH-PX serum levels showed no correlations. Logistic regression analysis showed that CP was a risk factor for Cu deficiency, ROC analysis showed that CP had diagnostic value for Cu deficiency, with a critical value of 13.7 U/l. Hence, CP and T-AOC levels in lactating cows showed strong correlations to Cu deficiency, indicating that serum CP can be used to predict Cu deficiency.
{"title":"Correlations between Copper Deficiency and Oxidative Stress in Dairy Cows","authors":"Xiao Xinhuan, Shu Shi Xia Cheng Wang Gang Bai Yunlong Xu Chuchu, Wu Ling","doi":"10.12783/ISSN.1544-8053/14/1/11","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/1/11","url":null,"abstract":"Copper (Cu) is an important microelement for the maintenance of normal metabolism of dairy cows and a variety of enzymic composition. When Cu deficiency is occurred in dairy cows, it’ll be accompanied by many diseases. The main objective of the present study was to explore the correlation between Cu deficiency and oxidative stress of lactating dairy cows and evaluate early-warning index for Cu deficiency. There were divided into two groups based on serum Cu levels: a Cu deficiency group and a control group. Serum levels of ceruloplasmin (CP), superoxide dismutase (SOD), total antioxidant capacity (T-AOC), glutathione peroxidase (GSH-PX), and Cu were analysed. The results showed that CP levels in the Cu deficiency group were significantly lower than in the control group, while T-AOC levels were significantly higher, but there were no significant differences between SOD and GSH-PX levels. Pearson correlation analysis showed that serum CP levels were very significantly positively correlated with Cu deficiency, while serum T-AOC levels were very significantly negatively correlated and SOD and GSH-PX serum levels showed no correlations. Logistic regression analysis showed that CP was a risk factor for Cu deficiency, ROC analysis showed that CP had diagnostic value for Cu deficiency, with a critical value of 13.7 U/l. Hence, CP and T-AOC levels in lactating cows showed strong correlations to Cu deficiency, indicating that serum CP can be used to predict Cu deficiency.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"18 1","pages":"85-89"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81600555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/1/15
Aibin Ka, Lixuan Wang, Bin Zh
This study focused on domestic wastewater in a campus and investigated chemical oxygen demand (COD) removal efficiency and removal mechanism in a wastewater treatment system using three-step series constructed rapid infiltration (CRI). The experimental results indicated that the three-step series CRI system led to COD removal of 79.65%, a value 6% greater than that in a system using conventional CRI. Moreover, the effluent water quality of the three-step series CRI system met the first level criteria A as specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002). Total organic matter and particulate organic matter in the wastewater were removed in the first compartment of the system by 54% and 83%, respectively. The quantity of aerobic ammonifying bacteria decreased from top to bottom along the compartments in the system, and was obviously higher than in the conventional CRI system. The dehydrogenase activity showed an M-shaped variation pattern in which two peak activity values were observed. The COD removal efficiency showed a very significant correlation with the aerobic bacteria quantity (correlation coefficient r = 0.97), and showed a relatively significant correlation with the dehydrogenase activity (r = 0.64). The biofilm mass and the active biofilm mass showed M-shaped variation patterns, and were obviously higher than in the conventional CRI system. The COD removal efficiency showed a relatively significant correlation with the weight of the active biofilm mass (r = 0.73).
{"title":"A Study on Mechanism of Organic Matter Removal in a Three-step Series Constructed Rapid Infiltration System Used for Domestic Wastewater Treatment","authors":"Aibin Ka, Lixuan Wang, Bin Zh","doi":"10.12783/ISSN.1544-8053/14/1/15","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/1/15","url":null,"abstract":"This study focused on domestic wastewater in a campus and investigated chemical oxygen demand (COD) removal efficiency and removal mechanism in a wastewater treatment system using three-step series constructed rapid infiltration (CRI). The experimental results indicated that the three-step series CRI system led to COD removal of 79.65%, a value 6% greater than that in a system using conventional CRI. Moreover, the effluent water quality of the three-step series CRI system met the first level criteria A as specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002). Total organic matter and particulate organic matter in the wastewater were removed in the first compartment of the system by 54% and 83%, respectively. The quantity of aerobic ammonifying bacteria decreased from top to bottom along the compartments in the system, and was obviously higher than in the conventional CRI system. The dehydrogenase activity showed an M-shaped variation pattern in which two peak activity values were observed. The COD removal efficiency showed a very significant correlation with the aerobic bacteria quantity (correlation coefficient r = 0.97), and showed a relatively significant correlation with the dehydrogenase activity (r = 0.64). The biofilm mass and the active biofilm mass showed M-shaped variation patterns, and were obviously higher than in the conventional CRI system. The COD removal efficiency showed a relatively significant correlation with the weight of the active biofilm mass (r = 0.73).","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"80 1","pages":"115-120"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83946243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.12783/issn.1544-8053/14/S1/16
Jinlu Lai
Given the rapidly increasing popularity of online impulse buying using digital platforms, it has raised significant interests about the antecedents of consumer behaviour. The aim of this study is to compare the main factors which influence online customers’ purchase decisions on clothing in PRC and the UK. The study conducted was exploratory in nature, aiming to create an understanding of impulse purchasing behaviour before, under and after the actual action. The results show that several factors such as price discounts, online comments, can strongly affect the impulse buying behaviour among online customers. This study provides novel insights for marketing literature and online retailers. The result of this research would contribute to retailers and marketers who wish to penetrate the market in the UK and China who is already present in the market and wishes to keep the loyalty of their consumers. It can also be a part of the research on international customer behaviour towards online apparel shopping.
{"title":"The comparative research on online impulsive buying behaviour between the U.K. and China","authors":"Jinlu Lai","doi":"10.12783/issn.1544-8053/14/S1/16","DOIUrl":"https://doi.org/10.12783/issn.1544-8053/14/S1/16","url":null,"abstract":"Given the rapidly increasing popularity of online impulse buying using digital platforms, it has raised significant interests about the antecedents of consumer behaviour. The aim of this study is to compare the main factors which influence online customers’ purchase decisions on clothing in PRC and the UK. The study conducted was exploratory in nature, aiming to create an understanding of impulse purchasing behaviour before, under and after the actual action. The results show that several factors such as price discounts, online comments, can strongly affect the impulse buying behaviour among online customers. This study provides novel insights for marketing literature and online retailers. The result of this research would contribute to retailers and marketers who wish to penetrate the market in the UK and China who is already present in the market and wishes to keep the loyalty of their consumers. It can also be a part of the research on international customer behaviour towards online apparel shopping.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"116 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86069779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/S1/20
S. Yuan, Jiangfeng Dong, Qingyuan Wang
This paper presents the results of experimental investigations on steel tube strengthened recycled concrete (STSRC) exposed to high temperatures and reinforced by CFRP. The failure mode, bearing capacity and deformability of the columns were investigated to analyze the effects of CFRP, temperatures (300°C, 500°C and 700°C), and recycled coarse aggregate (RCA) replacement ratios (0%, 50% and 100%) on mechanical performance. The results indicate that the higher exposed temperatures, the more cracks occurred and the lower ultimate load carrying capacities for the specimens, and the failure mode and load capacity could be increased greatly by external strengthened with CFRP sheets. However, the higher RCA replacement ratio could induced a smaller cracks and higher load capacity, and the specimens with 50% RCA ratio gave the highest load capacity when exposed to high temperature. In addition, the ABAQUS software was employed to conduct finite element analysis (FEA) of STSRC reinforced, and a comparison of results calculated using the proposed model exhibits good agreement with an experimental results.
{"title":"Performance of Steel Tube Strengthened Recycled Concrete Exposure to High Temperature and Reinforced by CFRP","authors":"S. Yuan, Jiangfeng Dong, Qingyuan Wang","doi":"10.12783/ISSN.1544-8053/14/S1/20","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/S1/20","url":null,"abstract":"This paper presents the results of experimental investigations on steel tube strengthened recycled concrete (STSRC) exposed to high temperatures and reinforced by CFRP. The failure mode, bearing capacity and deformability of the columns were investigated to analyze the effects of CFRP, temperatures (300°C, 500°C and 700°C), and recycled coarse aggregate (RCA) replacement ratios (0%, 50% and 100%) on mechanical performance. The results indicate that the higher exposed temperatures, the more cracks occurred and the lower ultimate load carrying capacities for the specimens, and the failure mode and load capacity could be increased greatly by external strengthened with CFRP sheets. However, the higher RCA replacement ratio could induced a smaller cracks and higher load capacity, and the specimens with 50% RCA ratio gave the highest load capacity when exposed to high temperature. In addition, the ABAQUS software was employed to conduct finite element analysis (FEA) of STSRC reinforced, and a comparison of results calculated using the proposed model exhibits good agreement with an experimental results.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"49 9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91116116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/1/48
Liu Chuanlu, Dong Xiangjun Yuan Hanning Lv Guohua, Dong Xue
Positive and negative sequential patterns (PNSP) play an informative role in various applications. In this paper, a new method is proposed to effectively select the actionable sequential patterns (ASP) from the PNSPs by segmenting and discriminating elements with sequence. First, it is to locally discriminate adjacent elements and incremental elements in the PNSPs. Second, globally segment and discriminate all the elements with sequences. Third, Markov process is further applied to select the ASP by measuring the interestingness of a sequence. The experimental comparisons on synthetic and real-world databases show that the proposed method is very effective to select ASPs.
{"title":"Selecting Actionable Patterns from Positive and Negative Sequential Patterns","authors":"Liu Chuanlu, Dong Xiangjun Yuan Hanning Lv Guohua, Dong Xue","doi":"10.12783/ISSN.1544-8053/14/1/48","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/1/48","url":null,"abstract":"Positive and negative sequential patterns (PNSP) play an informative role in various applications. In this paper, a new method is proposed to effectively select the actionable sequential patterns (ASP) from the PNSPs by segmenting and discriminating elements with sequence. First, it is to locally discriminate adjacent elements and incremental elements in the PNSPs. Second, globally segment and discriminate all the elements with sequences. Third, Markov process is further applied to select the ASP by measuring the interestingness of a sequence. The experimental comparisons on synthetic and real-world databases show that the proposed method is very effective to select ASPs.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"52 2 1","pages":"407-419"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90925400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/S1/14
Hujun He, Wei Liu Jian Zhang Longwei Yang Le An, Bin Li
Accompanied with rapid economic growth and human development, the world faces severe water shortages, which pose a serious threat to human society. In the present study, the significance of water environmental quality evaluation and problems found in available evaluation methods were discussed, with a focus on prior research results. This paper selected ammonia nitrogen (NH3-N), chemical oxygen demand (COD), cyanide, volatile phenol and petroleum as evaluation factors, and established level-evaluating and order-arranging models of water environmental quality on the basis of information entropy and uncertainty measure theory. The uncertainty influence factors based on the real situation were quantitatively and qualitatively analyzed, and the experimental data were used to establish the uncertainty measure function. Also, we adopted information entropy theory to calculate the weight of the index, and determined the level and level order of water environmental quality based on credible degree recognition criterion. The developed model was applied to assess water environmental quality in four sections of Dan River Basin. The results show that uncertainty measure method is reasonable, with the potential significance of assessing water environment quality in the future.
{"title":"Application of Uncertainty Mathematics Theory in Water Environmental Quality Evaluation","authors":"Hujun He, Wei Liu Jian Zhang Longwei Yang Le An, Bin Li","doi":"10.12783/ISSN.1544-8053/14/S1/14","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/S1/14","url":null,"abstract":"Accompanied with rapid economic growth and human development, the world faces severe water shortages, which pose a serious threat to human society. In the present study, the significance of water environmental quality evaluation and problems found in available evaluation methods were discussed, with a focus on prior research results. This paper selected ammonia nitrogen (NH3-N), chemical oxygen demand (COD), cyanide, volatile phenol and petroleum as evaluation factors, and established level-evaluating and order-arranging models of water environmental quality on the basis of information entropy and uncertainty measure theory. The uncertainty influence factors based on the real situation were quantitatively and qualitatively analyzed, and the experimental data were used to establish the uncertainty measure function. Also, we adopted information entropy theory to calculate the weight of the index, and determined the level and level order of water environmental quality based on credible degree recognition criterion. The developed model was applied to assess water environmental quality in four sections of Dan River Basin. The results show that uncertainty measure method is reasonable, with the potential significance of assessing water environment quality in the future.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84070025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/1/47
Yu Xiao, Zhang Quanxin Cheng Zijing Tan Yuan, Zheng Jun
The advent of big data age has brought about a growing scale of the storage system, as well as huge power consumption, so energy-saving storage system is important progress towards sustainable development. Based on sequential data storage featured workload, we, by adding a solid state disk(SSD) and a parity disk on S-RAID, haveoptimized random reads and writes by means of Reed-Solomon(RS) code, extended the standby time of the disks, effectively avoided the frequent disk startup, and finally achieved the goal of energy saving. The experiments show that, the performance of the MPS-RAID, which consists of 12 disks and an SSD, has improved to some degree, and the energy consumption has reduced by over 20%in EXT4, NTFS, NILFS file systems.
{"title":"MPS-RAID: An Energy Saving Method for Multiple Parity-based S-RAID","authors":"Yu Xiao, Zhang Quanxin Cheng Zijing Tan Yuan, Zheng Jun","doi":"10.12783/ISSN.1544-8053/14/1/47","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/1/47","url":null,"abstract":"The advent of big data age has brought about a growing scale of the storage system, as well as huge power consumption, so energy-saving storage system is important progress towards sustainable development. Based on sequential data storage featured workload, we, by adding a solid state disk(SSD) and a parity disk on S-RAID, haveoptimized random reads and writes by means of Reed-Solomon(RS) code, extended the standby time of the disks, effectively avoided the frequent disk startup, and finally achieved the goal of energy saving. The experiments show that, the performance of the MPS-RAID, which consists of 12 disks and an SSD, has improved to some degree, and the energy consumption has reduced by over 20%in EXT4, NTFS, NILFS file systems.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"73 1","pages":"393-405"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84272039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/S1/23
Zhe Qin, W. Fu, Xuxin Chen
In the background of an open-pit slope at warehouse gold mine, the beresitization fractured granite (SγJH) was selected to conduct rock tri-axial creep test subject to different saturation-dehydration cycles. It is found that the creep characteristics conform to Burgers model without considering the change of the creep failure stage. The creep parameters, the principal stress difference and its deviation are analyzed for saturation-dehydration cycles of N = 0, 1, 5, 10, respectively. Results show that the parameters of Burgers model are substantially influenced by the load level. G1 and G2 increase with the increase of axial loading. η1 and η2 decrease with the increase of axial loading. The relationship between the four parameters and the stress difference follows exponential trend. An exponential relation is found between the creep parameters and the principal stress difference for constant saturation-dehydration circles. The creep parameters are approximately exponential functions of the cycle number n for the same principal stress difference. Through curve fitting of the test data, the values of the parameters in Burgers model for the beresitization fractured granite (SγJH) are obtained by considering the water-rock interaction and principal stress difference.
{"title":"Effect of Saturation-Dehydration on the Parameters of Burgers Creep Model","authors":"Zhe Qin, W. Fu, Xuxin Chen","doi":"10.12783/ISSN.1544-8053/14/S1/23","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/S1/23","url":null,"abstract":"In the background of an open-pit slope at warehouse gold mine, the beresitization fractured granite (SγJH) was selected to conduct rock tri-axial creep test subject to different saturation-dehydration cycles. It is found that the creep characteristics conform to Burgers model without considering the change of the creep failure stage. The creep parameters, the principal stress difference and its deviation are analyzed for saturation-dehydration cycles of N = 0, 1, 5, 10, respectively. Results show that the parameters of Burgers model are substantially influenced by the load level. G1 and G2 increase with the increase of axial loading. η1 and η2 decrease with the increase of axial loading. The relationship between the four parameters and the stress difference follows exponential trend. An exponential relation is found between the creep parameters and the principal stress difference for constant saturation-dehydration circles. The creep parameters are approximately exponential functions of the cycle number n for the same principal stress difference. Through curve fitting of the test data, the values of the parameters in Burgers model for the beresitization fractured granite (SγJH) are obtained by considering the water-rock interaction and principal stress difference.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81541304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/S1/3
Hu Ze, Xie Xiaohui Chen Rong Ge Liang, Gu Sanchun
Cable transmission has its intrinsic advantages and it is the development tendency of intelligent drilling among all kinds of signal transmission. According to the structure characteristics of the intelligent drill string, this paper analyzes the transmission line distribution parameters of intelligent drill string combined with average transmission theory; transfer matrixes of single drill pipe, drill pipe joint and that of cascaded transmission line between them are all calculated by the transmission line transfer function; impedance model of intelligent drill string communication channel model are built according to that transfer matrix based on the two-port network, then this model is simulated by experiment and the result is analyzed; curve of error rate is got and the influence of different signal-noise ratio, different transmission rate and different transmission distance on signal transmission performance are analyzed. This model simplifies the calculation, and the frequency characteristics and attenuation characteristics of transmission line are obtained under the analog signal and the digital signal, then the average transmission signal characteristics of intelligent drill string is analyzed by intuitive squiggle. Maybe this paper could provide some theoretical guidance for intelligent drill string.
{"title":"Research on Impedance Model of Intelligent Drill String Based on the Average Transformation Theory","authors":"Hu Ze, Xie Xiaohui Chen Rong Ge Liang, Gu Sanchun","doi":"10.12783/ISSN.1544-8053/14/S1/3","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/S1/3","url":null,"abstract":"Cable transmission has its intrinsic advantages and it is the development tendency of intelligent drilling among all kinds of signal transmission. According to the structure characteristics of the intelligent drill string, this paper analyzes the transmission line distribution parameters of intelligent drill string combined with average transmission theory; transfer matrixes of single drill pipe, drill pipe joint and that of cascaded transmission line between them are all calculated by the transmission line transfer function; impedance model of intelligent drill string communication channel model are built according to that transfer matrix based on the two-port network, then this model is simulated by experiment and the result is analyzed; curve of error rate is got and the influence of different signal-noise ratio, different transmission rate and different transmission distance on signal transmission performance are analyzed. This model simplifies the calculation, and the frequency characteristics and attenuation characteristics of transmission line are obtained under the analog signal and the digital signal, then the average transmission signal characteristics of intelligent drill string is analyzed by intuitive squiggle. Maybe this paper could provide some theoretical guidance for intelligent drill string.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"332 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80548142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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