The freezing-thawing deformation behaviors of consolidated soils under high pressure have been investigated in a high-pressure-low-temperature （HPLT） Kq consolidation apparatus with a small strain sensor. The tests...The freezing-thawing deformation behaviors of consolidated soils under high pressure have been investigated in a high-pressure-low-temperature （HPLT） Kq consolidation apparatus with a small strain sensor. The tests cover a variety of frozen soil temperatures ranging from -2℃ to -10 ℃, and a series of applied pressures ranging from 1 MPa to 5 MPa. The test results show that, for the consolidated soils under high pressure, their freezing-thawing deformation was caused by the realignment and the deformation of soil particles, the phase change of water, and the water redistribution in the soil. As for the deformation produced by thermal expansion and contraction,it is about 0.04-0.05 mm, accounting for only about 7%~9% of the total deformation. Taking the freezing-thawing deformation produced by temperature disturbance as a creep deformation, the creep models of the developing soil deformation will be determined by the soil＇s final temperature, i.e., the desired temperature. For the soils under a desired temperature between -2℃ and -5℃, the freezing-thawing de-formation develops according to a non-attenuation creep model; but for the soils with a desired temperature lower than -5℃, a full attenuation creep model is followed. The applied pressure and soil type also have a significant influence on the maximum freezing deformation. Generally, the greater the desired pressure applied, the less the maximum deformation is; and the loess freezing deformation is larger than that of sand.展开更多
Objective: Percutaneous coronary intervention (PCI) via the radial artery access has more advantages than that of femoral artery access, while radial or (and) brachial artery have tendency to be spasmodic. We sought t...Objective: Percutaneous coronary intervention (PCI) via the radial artery access has more advantages than that of femoral artery access, while radial or (and) brachial artery have tendency to be spasmodic. We sought to investigate the effectiveness and safety of guiding catheter crossing over spasmodic radial or (and) brachial artery segments by the aid of PCI wire and balloon compared with traditional anti-spasmodic approach. Methods: The clinical data of 168 patients with coronary artery disease (CAD) (group A), whose PCI was performed via radial artery access with radial or (and) brachial artery spasm or (and) dissection and guiding catheter passing through spasmodic segments successfully by the aid of PCI guiding wire and balloon were analyzed retrospectively, simultaneously, the other 73 patients (group B) who used conventional approach to cross over the spasmodic radial or (and) brachial artery segments were treated as the control. The success rate, the time consumption and the complication were compared between the two groups. Findings: There was no significant difference in the spasmodic site between the two groups (all p value > 0.05). The success rate in group A was significantly higher than that in group B (168(100%) vs 28 (38.4%), p (4.2%) vs 14 (19.2%), p Conclusions: It is more effective and safer for guiding catheter crossing over spasmodic or (and) dissected radial or (and) brachial artery segments by the aid of PCI guiding wire and balloon than using the routine approach of administration of anti-spasm drugs for trans-radial PCI.展开更多
With the market competition intensifies, enterprises focusing on core business has become the most important rules of survival. Therefore, more and more enterprises adopt outsourcing as critical business initiatives d...With the market competition intensifies, enterprises focusing on core business has become the most important rules of survival. Therefore, more and more enterprises adopt outsourcing as critical business initiatives due to its effectively reduce costs, enhancing the core competitiveness of enterprises and other characteristics. Duroc, a famous American management scholars had predicted: “In ten to fifteen years within any business background to support not only to do the work of creating turnover should be outsourced.” Do what you do best (your core competency) and outsource the rest. It has become an irreversible trend. In this paper, we will introduce the business value of IT outsourcing, discuss IT outsourcing industry’s strengths and weaknesses, finally we will provide corresponding countermeasures based on the discussion.展开更多
Customer Operations Performance Center Inc (COPC) is the world’s leading authority on Contact Center Operations Management. The COPC 2000 Standard is a comprehensive operating model for Contact Centre Operations. It ...Customer Operations Performance Center Inc (COPC) is the world’s leading authority on Contact Center Operations Management. The COPC 2000 Standard is a comprehensive operating model for Contact Centre Operations. It is a world-wide benchmark and certification for contact centers. As well as an overall performance management system, COPC is designed to reduce costs, increase revenue, and improve service, quality and customer satisfaction. However, many COPC implementation projects failed. In this study, we first review the process of implementing COPC. Then, we identify major barriers in implementing COPC. Organizations should take proper measures in overcoming these barriers to ensure successful implementation of COPC.展开更多
This study was conducted with non-English sophomore students,aiming to explore the effects of different interaction combinations and language levels on continuous writing in an online environment,and compare the diffe...This study was conducted with non-English sophomore students,aiming to explore the effects of different interaction combinations and language levels on continuous writing in an online environment,and compare the differences in lexical alignments and composition quality of learners with different interaction combinations and language levels in the same continuous writing task through experiments.The results show that the mean values of the word-phrase alignment of the paired group were higher than those of the individual group in different interaction combinations,and the two groups showed significant differences;in terms of composition quality,the individual group was better than the paired group,but there was no significant difference between the two groups in terms of task continuation.Secondly,the word-phrase alignment and composition scores of the different language-level groups were higher than those of the same language-level groups,and there was a significant difference between the two groups in terms of word-phrase alignments,but not in terms of composition scores.The results of this study can be useful and informative for second language teachers in future continuous teaching in online environments.展开更多
基金supported by a grant from the National Natural Science Foundation of China(No.41671069,No.41630636)Foundation of the State Key Laboratory of Frozen Soil Engineering(SKLFSE-ZT-31)
文摘The freezing-thawing deformation behaviors of consolidated soils under high pressure have been investigated in a high-pressure-low-temperature （HPLT） Kq consolidation apparatus with a small strain sensor. The tests cover a variety of frozen soil temperatures ranging from -2℃ to -10 ℃, and a series of applied pressures ranging from 1 MPa to 5 MPa. The test results show that, for the consolidated soils under high pressure, their freezing-thawing deformation was caused by the realignment and the deformation of soil particles, the phase change of water, and the water redistribution in the soil. As for the deformation produced by thermal expansion and contraction,it is about 0.04-0.05 mm, accounting for only about 7%~9% of the total deformation. Taking the freezing-thawing deformation produced by temperature disturbance as a creep deformation, the creep models of the developing soil deformation will be determined by the soil＇s final temperature, i.e., the desired temperature. For the soils under a desired temperature between -2℃ and -5℃, the freezing-thawing de-formation develops according to a non-attenuation creep model; but for the soils with a desired temperature lower than -5℃, a full attenuation creep model is followed. The applied pressure and soil type also have a significant influence on the maximum freezing deformation. Generally, the greater the desired pressure applied, the less the maximum deformation is; and the loess freezing deformation is larger than that of sand.
文摘Objective: Percutaneous coronary intervention (PCI) via the radial artery access has more advantages than that of femoral artery access, while radial or (and) brachial artery have tendency to be spasmodic. We sought to investigate the effectiveness and safety of guiding catheter crossing over spasmodic radial or (and) brachial artery segments by the aid of PCI wire and balloon compared with traditional anti-spasmodic approach. Methods: The clinical data of 168 patients with coronary artery disease (CAD) (group A), whose PCI was performed via radial artery access with radial or (and) brachial artery spasm or (and) dissection and guiding catheter passing through spasmodic segments successfully by the aid of PCI guiding wire and balloon were analyzed retrospectively, simultaneously, the other 73 patients (group B) who used conventional approach to cross over the spasmodic radial or (and) brachial artery segments were treated as the control. The success rate, the time consumption and the complication were compared between the two groups. Findings: There was no significant difference in the spasmodic site between the two groups (all p value > 0.05). The success rate in group A was significantly higher than that in group B (168(100%) vs 28 (38.4%), p (4.2%) vs 14 (19.2%), p Conclusions: It is more effective and safer for guiding catheter crossing over spasmodic or (and) dissected radial or (and) brachial artery segments by the aid of PCI guiding wire and balloon than using the routine approach of administration of anti-spasm drugs for trans-radial PCI.
文摘With the market competition intensifies, enterprises focusing on core business has become the most important rules of survival. Therefore, more and more enterprises adopt outsourcing as critical business initiatives due to its effectively reduce costs, enhancing the core competitiveness of enterprises and other characteristics. Duroc, a famous American management scholars had predicted: “In ten to fifteen years within any business background to support not only to do the work of creating turnover should be outsourced.” Do what you do best (your core competency) and outsource the rest. It has become an irreversible trend. In this paper, we will introduce the business value of IT outsourcing, discuss IT outsourcing industry’s strengths and weaknesses, finally we will provide corresponding countermeasures based on the discussion.
文摘Customer Operations Performance Center Inc (COPC) is the world’s leading authority on Contact Center Operations Management. The COPC 2000 Standard is a comprehensive operating model for Contact Centre Operations. It is a world-wide benchmark and certification for contact centers. As well as an overall performance management system, COPC is designed to reduce costs, increase revenue, and improve service, quality and customer satisfaction. However, many COPC implementation projects failed. In this study, we first review the process of implementing COPC. Then, we identify major barriers in implementing COPC. Organizations should take proper measures in overcoming these barriers to ensure successful implementation of COPC.
文摘This study was conducted with non-English sophomore students,aiming to explore the effects of different interaction combinations and language levels on continuous writing in an online environment,and compare the differences in lexical alignments and composition quality of learners with different interaction combinations and language levels in the same continuous writing task through experiments.The results show that the mean values of the word-phrase alignment of the paired group were higher than those of the individual group in different interaction combinations,and the two groups showed significant differences;in terms of composition quality,the individual group was better than the paired group,but there was no significant difference between the two groups in terms of task continuation.Secondly,the word-phrase alignment and composition scores of the different language-level groups were higher than those of the same language-level groups,and there was a significant difference between the two groups in terms of word-phrase alignments,but not in terms of composition scores.The results of this study can be useful and informative for second language teachers in future continuous teaching in online environments.
