We investigated the geological factors associated with unsuccessful exploration wells in the northern margin of the Qaidam basin to better understand their cause.The structural situation,the hydrocarbon accumulation m...We investigated the geological factors associated with unsuccessful exploration wells in the northern margin of the Qaidam basin to better understand their cause.The structural situation,the hydrocarbon accumulation mechanism and unsuccessful well data collected from 1996 to 2005 were studied.The results show that the main geological factors associated with unsuccessful exploration wells are a lack of effective source rocks and a lack of effective traps,as well as the migration-accumulation conditions that exist in this area.The basin was reformed by Meso-Cenozoic tectonic evolution.Multi-stage tectonic activities have both positive and negative effects on hydrocarbon accumulation.Source rocks distribution,effective migration channels,effective traps and the tectonic evolution effects on hydrocarbons should be the key objects for further studies.展开更多
[Objective] The reason for the unsuccessful forecast of a heavy rainfall event in Yingkou was analyzed. [Method] Based on the precipitation data observed by automatic weather stations and MICAPS data, a heavy rainfall...[Objective] The reason for the unsuccessful forecast of a heavy rainfall event in Yingkou was analyzed. [Method] Based on the precipitation data observed by automatic weather stations and MICAPS data, a heavy rainfall Event was studied in Yingkou from 19 July to 21 July in 2010. Then the analysis of an unsuccessful forecasting for the heavy rainfall on 21 July was illustrated by CINRAD-SA data, satellite data and numerical forecast products. [Result] The main reason for the unsuccessful forecast was that the duration of the rainfall was long and inconsecutive. The distribution was uneven. Strong precipitation on 21st was different from the one in previous two durations. It was regional short term strong precipitation. And the forecast difficulty was large; the numerical forecast was unstable and erroneous;strong precipitation occurred in the night on 20th, which was shortly before the strong precipitation in the evening of 21st. This would easily confuse the reporter. Besides, the short term stillness of radar and cloud during this time would form certain disturbance. The focus of rainstorm forecast should based on the numerical forecast instead of element forecast;insisting on situation analysis and taking element judgment as auxiliary;as for strong precipitation forecast, there was large error in numerical forecast and can not be relied. Reporter should report the correct one based on experience. [Conclusion] The study provided reference for the forecast of rainstorm.展开更多
The term ＂unsuccessful college English learners＂ mentioned in this paper refers to those undergraduates getting less than 49.5 points in their fourth semester＇s CET-4. This paper did quite a lot of statistical data...The term ＂unsuccessful college English learners＂ mentioned in this paper refers to those undergraduates getting less than 49.5 points in their fourth semester＇s CET-4. This paper did quite a lot of statistical data work, summarized the main characteristics of those students and analyzed the main causes of resulting in this. In the end, some practical proposals and measures have been put forward to improve these students＇ English learning conditions and help them to get out of their difficult situation.展开更多
AIM: Prospective evaluation of repeat endoscopic retrograde cholangiopancreatography (ERCP) for failed Schutz grade 1 biliary cannulation in a high-volume center. METHODS: Prospective intention-to-treat analysis of pa...AIM: Prospective evaluation of repeat endoscopic retrograde cholangiopancreatography (ERCP) for failed Schutz grade 1 biliary cannulation in a high-volume center. METHODS: Prospective intention-to-treat analysis of patients referred for biliary cannulation following recent unsuccessful ERCP. RESULTS: Fifty-one patients (35 female; mean age: 62.5 years; age range: 40-87 years) with previous failed biliary cannulation were referred for repeat ERCP. The indication for ERCP was primarily choledocholithiasis (45%) or pancreatic malignancy (18%). Successful biliary can- nulation was 100%. The precut needle knife sphincterotomy (NKS) rate was 27.4%. Complications occurred in 3.9% (post-ERCP pancreatitis). An identif iable reason for initial unsuccessful biliary cannulation was present in 55% of cases. Compared to a cohort of 940 nave pa-pilla patients (female 61%; mean age: 59.9 years; age range: 18-94 years) who required sphincterotomy over the same time period, there was no statistical difference in the cannulation success rate (100% vs 98%) or postERCP pancreatitis (3.1% vs 3.9%). Precut NKS use was more frequent (27.4% vs 12.7%) (P = 0.017). CONCLUSION: Referral to a high-volume center following unsuccessful ERCP is associated with high technical success, with a favorable complication rate, compared to routine ERCP procedures.展开更多
According to the attribution theory,achievement attributions have significant consequences for subsequent achievement motivation and future behavior.This study sought to determine some of the causes to which junior st...According to the attribution theory,achievement attributions have significant consequences for subsequent achievement motivation and future behavior.This study sought to determine some of the causes to which junior students at vocational college attributed success or failure in their English learning.The results of the present study revealed that the majority of the students participated in the study identified themselves as unsuccessful English learners and collectively the students placed more importance on the causal attributions of interest in English learning,effort and teachers' help.When divided by their perceived learning performances (successful learners vs.unsuccessful),the successful learners placed more importance on English learning ability,interests in English,and teacher's help than did the unsuccessful ones.The paper analyzes the attribution tendency,gender difference and group difference as well.展开更多
To describe the self-adaptive character of combat unit(CU), which may not be able to give precise explanation by conventional mission measurement, we present a measurement method orienting to unsuccess prevention for ...To describe the self-adaptive character of combat unit(CU), which may not be able to give precise explanation by conventional mission measurement, we present a measurement method orienting to unsuccess prevention for CU mission. Firstly, the task characteristics of multi-phase and multi-level of CU are explained.On this basis, a hierarchical measuring system including measure of capability deviation, relating to basic task unsuccess and composite task is given by quantifying the disturbance. Based on unified measurement, the basic task unsuccess according to presumable domain from required domain is quantified, and the composite task unsuccess is also quantified. Finally, a case of capability deviation measurement and its impact on overall unsuccess are presented for check.展开更多
基金Project XQ-2004-01 supported by the National Oil Project of China
文摘We investigated the geological factors associated with unsuccessful exploration wells in the northern margin of the Qaidam basin to better understand their cause.The structural situation,the hydrocarbon accumulation mechanism and unsuccessful well data collected from 1996 to 2005 were studied.The results show that the main geological factors associated with unsuccessful exploration wells are a lack of effective source rocks and a lack of effective traps,as well as the migration-accumulation conditions that exist in this area.The basin was reformed by Meso-Cenozoic tectonic evolution.Multi-stage tectonic activities have both positive and negative effects on hydrocarbon accumulation.Source rocks distribution,effective migration channels,effective traps and the tectonic evolution effects on hydrocarbons should be the key objects for further studies.
文摘[Objective] The reason for the unsuccessful forecast of a heavy rainfall event in Yingkou was analyzed. [Method] Based on the precipitation data observed by automatic weather stations and MICAPS data, a heavy rainfall Event was studied in Yingkou from 19 July to 21 July in 2010. Then the analysis of an unsuccessful forecasting for the heavy rainfall on 21 July was illustrated by CINRAD-SA data, satellite data and numerical forecast products. [Result] The main reason for the unsuccessful forecast was that the duration of the rainfall was long and inconsecutive. The distribution was uneven. Strong precipitation on 21st was different from the one in previous two durations. It was regional short term strong precipitation. And the forecast difficulty was large; the numerical forecast was unstable and erroneous;strong precipitation occurred in the night on 20th, which was shortly before the strong precipitation in the evening of 21st. This would easily confuse the reporter. Besides, the short term stillness of radar and cloud during this time would form certain disturbance. The focus of rainstorm forecast should based on the numerical forecast instead of element forecast;insisting on situation analysis and taking element judgment as auxiliary;as for strong precipitation forecast, there was large error in numerical forecast and can not be relied. Reporter should report the correct one based on experience. [Conclusion] The study provided reference for the forecast of rainstorm.
文摘The term ＂unsuccessful college English learners＂ mentioned in this paper refers to those undergraduates getting less than 49.5 points in their fourth semester＇s CET-4. This paper did quite a lot of statistical data work, summarized the main characteristics of those students and analyzed the main causes of resulting in this. In the end, some practical proposals and measures have been put forward to improve these students＇ English learning conditions and help them to get out of their difficult situation.
文摘AIM: Prospective evaluation of repeat endoscopic retrograde cholangiopancreatography (ERCP) for failed Schutz grade 1 biliary cannulation in a high-volume center. METHODS: Prospective intention-to-treat analysis of patients referred for biliary cannulation following recent unsuccessful ERCP. RESULTS: Fifty-one patients (35 female; mean age: 62.5 years; age range: 40-87 years) with previous failed biliary cannulation were referred for repeat ERCP. The indication for ERCP was primarily choledocholithiasis (45%) or pancreatic malignancy (18%). Successful biliary can- nulation was 100%. The precut needle knife sphincterotomy (NKS) rate was 27.4%. Complications occurred in 3.9% (post-ERCP pancreatitis). An identif iable reason for initial unsuccessful biliary cannulation was present in 55% of cases. Compared to a cohort of 940 nave pa-pilla patients (female 61%; mean age: 59.9 years; age range: 18-94 years) who required sphincterotomy over the same time period, there was no statistical difference in the cannulation success rate (100% vs 98%) or postERCP pancreatitis (3.1% vs 3.9%). Precut NKS use was more frequent (27.4% vs 12.7%) (P = 0.017). CONCLUSION: Referral to a high-volume center following unsuccessful ERCP is associated with high technical success, with a favorable complication rate, compared to routine ERCP procedures.
文摘According to the attribution theory,achievement attributions have significant consequences for subsequent achievement motivation and future behavior.This study sought to determine some of the causes to which junior students at vocational college attributed success or failure in their English learning.The results of the present study revealed that the majority of the students participated in the study identified themselves as unsuccessful English learners and collectively the students placed more importance on the causal attributions of interest in English learning,effort and teachers' help.When divided by their perceived learning performances (successful learners vs.unsuccessful),the successful learners placed more importance on English learning ability,interests in English,and teacher's help than did the unsuccessful ones.The paper analyzes the attribution tendency,gender difference and group difference as well.
文摘To describe the self-adaptive character of combat unit(CU), which may not be able to give precise explanation by conventional mission measurement, we present a measurement method orienting to unsuccess prevention for CU mission. Firstly, the task characteristics of multi-phase and multi-level of CU are explained.On this basis, a hierarchical measuring system including measure of capability deviation, relating to basic task unsuccess and composite task is given by quantifying the disturbance. Based on unified measurement, the basic task unsuccess according to presumable domain from required domain is quantified, and the composite task unsuccess is also quantified. Finally, a case of capability deviation measurement and its impact on overall unsuccess are presented for check.
