1.Objective Dunhuang Basin is the largest area and the third hydrocarbon resources potential basin among the basins of Hexi Corridor,and also a low exploration degree basin.The source rock position,characteristics and...1.Objective Dunhuang Basin is the largest area and the third hydrocarbon resources potential basin among the basins of Hexi Corridor,and also a low exploration degree basin.The source rock position,characteristics and hydrocarbon generating potential of residual Mid-Lower Jurassic are still unknown.The project is to ascertain the source rock development and hydrocarbon generating capacity of Mid-Lower Jurassic,to find out the resource potential,to delineate the resource prospect area and to optimize the favorable areas.It may direct the petroleum exploration in Dunhuang Basin.展开更多
A continuous overcast-rainy weather(CORW) process occurred over the mid-lower reaches of the Yangtze River(MLRYR) in China from February 14 to March 9 in 2009,with a large stretch and long duration that was rarely see...A continuous overcast-rainy weather(CORW) process occurred over the mid-lower reaches of the Yangtze River(MLRYR) in China from February 14 to March 9 in 2009,with a large stretch and long duration that was rarely seen in historical records.Using the empirical orthogonal function(EOF),we analyzed the geopotential height anomaly field of the NCEP-DOE Reanalysis II in the same period,and defined the stable components of extended-range(10-30 days) weather forecast(ERWF).Furthermore,we defined anomalous and climatic stable components based on the variation characteristics of the variance contribution ratio of EOF components.The climatic stable components were able to explain the impact of climatically averaged information on the ERWF,and the anomalous stable components revealed the abnormal characteristics of the continuous overcast-rainy days.Our results show that the stable components,especially the anomalous stable components,can maintain the stability for a longer time(more than 10 days) and manifest as monthly scale low-frequency variation and ultra-long-wave activities.They also behave as ultra-long waves of planetary scale with a stable and vertically coherent structure,reflect the variation of general circulation in mid-high latitudes,display the cycle of the zonal circulation and the movement and adjustment of the ultra-long waves,and are closely linked to the surface CORW process.展开更多
The role of small bowel capsule endoscopy (CE) in suspected small bowel bleedingis well established and current European and other international guidelinesposition it as the first line test after negative bidirectiona...The role of small bowel capsule endoscopy (CE) in suspected small bowel bleedingis well established and current European and other international guidelinesposition it as the first line test after negative bidirectional endoscopies. Insuspected mid-lower gastrointestinal bleeding (MLGIB) the diagnostic yield ofcolonoscopy is poor and may cause a delay in detecting small bowel disease. Acrucial aspect of small bowel capsule endoscope performance is the timing of theprocedure, the interval between the bleeding episode and capsule ingestion isinversely related to the diagnostic yield as confirmed by a recent meta-analysis.Currently the ongoing advances achieved by video CE in particular to evaluateboth small bowel and colon in a single test using double headed capsules, raisesquestions regarding the position of pan intestinal capsule in the current algorithmto investigate patients presenting with suspected MLGIB ahead of colonoscopy.Early evidence suggests pan intestinal capsule could fit well as a diagnostic“filter” test in this cohort of patients, thereby reserving invasive conventionalcolonoscopy or device assisted enteroscopy as therapeutics options only. The recentdevelopment of magnetically controlled CE and a blood sensing capsule pushthe boundaries of CE even further in patients presenting with suspected gastrointestinalbleeding. This review will discuss the current available evidence andfuture directions of CE in suspected MLGIB.展开更多
目的比较面部SMAS筋膜除皱术复合面部脂肪抽吸术与传统单纯面部SMAS筋膜除皱术的临床疗效及安全性。方法选取2021年6月至2023年6月河北承德玥莱美整形医院收治的54例中重度面部皮肤松弛患者,分为对照组(27例,行传统单纯面部SMAS筋膜除皱...目的比较面部SMAS筋膜除皱术复合面部脂肪抽吸术与传统单纯面部SMAS筋膜除皱术的临床疗效及安全性。方法选取2021年6月至2023年6月河北承德玥莱美整形医院收治的54例中重度面部皮肤松弛患者,分为对照组(27例,行传统单纯面部SMAS筋膜除皱术)与观察组(27例,行面部SMAS筋膜除皱术复合面部脂肪抽吸术)。比较两组患者手术时间、术后肿胀恢复时间、除皱效果、长期效果(效果持久性)及患者满意度。结果对照组手术时间(4.0±0.5)h短于观察组(4.5±0.5)h,差异有统计学意义(P<0.01),对照组术后肿胀恢复时间(12.9±5.85)d短于观察组(15.8±8.05)d,差异有统计学意义(P=0.04)。观察组在改善口周隆起(0 vs 55.55%)、效果持久性(11.1%vs 37.0%)及患者满意度(96.3%vs 51.9%)方面均显著优于对照组,差异有统计学意义(P<0.05)。两组均未发生切口感染等严重并发症。结论面部SMAS筋膜除皱术复合面部脂肪抽吸术,可有效改善面颊和口周脂肪堆积,提升面部皮肤平整度与紧致度,延缓面部皮肤松弛进程,效果更持久,美学效果更佳,患者满意度更高。虽然手术时间及术后肿胀恢复期略长,但整体是面部SMAS筋膜除皱术的理想优化术式,值得推广。展开更多
目的了解经肛全直肠系膜切除手术(transanal total mesorectal excision,TaTME)的短期临床效果,以为临床治疗决策提供依据。方法检索近年来国内外数据库中的相关文献,系统回顾TaTME操作平台在中低位直肠癌治疗中的应用现状,并从术中情...目的了解经肛全直肠系膜切除手术(transanal total mesorectal excision,TaTME)的短期临床效果,以为临床治疗决策提供依据。方法检索近年来国内外数据库中的相关文献,系统回顾TaTME操作平台在中低位直肠癌治疗中的应用现状,并从术中情况、术后短期恢复效果、术中及术后并发症、肿瘤学预后、学习曲线等方面进行分析,主要与腹腔镜TME(laparoscopic TME,LapTME)进行对比分析。结果传统的LapTME在盆腔及直肠周围精细操作时存在一定难度,尤其是在肥胖、骨盆狭窄、男性等“困难骨盆”患者中,相比之下,TaTME手术通过增强解剖平面的可视化,在减少术中出血、降低中转开腹率、加快术后短期恢复、改善手术标本质量等方面表现出一定优势。结论本综述分析的结果提示,TaTME手术安全性较高,它在短期疗效方面与LapTME手术更优或相当,为中低位直肠癌的外科治疗提供了新的手术方式选择。展开更多
Three generation systems, namely, steam Rankine cycle （SRC）, organic Rankine cycle （ORC）, and steam-organic combined Rankine cycle （S-ORC）, were simulated using the Engineering Equation Solver fEES） to efficien...Three generation systems, namely, steam Rankine cycle （SRC）, organic Rankine cycle （ORC）, and steam-organic combined Rankine cycle （S-ORC）, were simulated using the Engineering Equation Solver fEES） to efficiently utilize flue gas emissions from 200 to 450 ℃ in iron and steel plants. Based on the simulation results for thermal efficiency, exergy efficiency, and power generation, the performances of the three power generation systems were compared and analyzed. To further utilize waste heat from the turbine exhaust steam of the ORC system, cas- cade （）RC （CORC） was designed for heat sources above 300 ℃. Based on a comprehensive performance comparison, the application of the ORC using R141b is preferable for 200 to 300 ℃ flue gas. For 300 to 450 ℃ flue gas, CORC is an alternative technology to improve the efficiency and quality of waste heat utilization. For flue gas above 450 ℃, S-ORC can achieve higher efficiency and power generation than conventional SRC, with a relatively small negative pressure and high dryness of the turbine outlet steam. Hence, S-ORC can be considered as a substitute for SRC.展开更多
Background: NCCN’s guidelines for the diagnosis and treatment of rectal cancer suggest that accurate preoperative clinical staging of rectal cancer is very important. Reliable preoperative evaluation is the key to th...Background: NCCN’s guidelines for the diagnosis and treatment of rectal cancer suggest that accurate preoperative clinical staging of rectal cancer is very important. Reliable preoperative evaluation is the key to the development of surgical protocols, in order to investigate the diagnostic value of digital rectal diagnosis for lymph node metastasis of middle and low rectal cancer. Methods: We prospectively performed digital rectal examination in 258 patients with mid-low rectal cancer before operation, to analyze the distance from the lower margin of the tumor to the margin of the anus, the diameter of the invasion of the intestinal wall of the tumor, the accuracy between the general type and depth of invasion of the tumor and the pathological results of the postoperative specimen, and the predictability of the lymph node metastasis rate of the rectal digital examination. Results: The results of the analysis showed that the above indicators and postoperative pathological findings have high accuracy. Conclusions: It is concluded that accurate and detailed digital rectal examination before operation can predict lymph node metastasis rate of mid-low rectal cancer at a higher level and accurately.展开更多
文摘1.Objective Dunhuang Basin is the largest area and the third hydrocarbon resources potential basin among the basins of Hexi Corridor,and also a low exploration degree basin.The source rock position,characteristics and hydrocarbon generating potential of residual Mid-Lower Jurassic are still unknown.The project is to ascertain the source rock development and hydrocarbon generating capacity of Mid-Lower Jurassic,to find out the resource potential,to delineate the resource prospect area and to optimize the favorable areas.It may direct the petroleum exploration in Dunhuang Basin.
基金supported by National Natural Science Foundation of China (Grant No.40930952)Science and Technology Supporting Project (Grant No.2009BAC51B04)
文摘A continuous overcast-rainy weather(CORW) process occurred over the mid-lower reaches of the Yangtze River(MLRYR) in China from February 14 to March 9 in 2009,with a large stretch and long duration that was rarely seen in historical records.Using the empirical orthogonal function(EOF),we analyzed the geopotential height anomaly field of the NCEP-DOE Reanalysis II in the same period,and defined the stable components of extended-range(10-30 days) weather forecast(ERWF).Furthermore,we defined anomalous and climatic stable components based on the variation characteristics of the variance contribution ratio of EOF components.The climatic stable components were able to explain the impact of climatically averaged information on the ERWF,and the anomalous stable components revealed the abnormal characteristics of the continuous overcast-rainy days.Our results show that the stable components,especially the anomalous stable components,can maintain the stability for a longer time(more than 10 days) and manifest as monthly scale low-frequency variation and ultra-long-wave activities.They also behave as ultra-long waves of planetary scale with a stable and vertically coherent structure,reflect the variation of general circulation in mid-high latitudes,display the cycle of the zonal circulation and the movement and adjustment of the ultra-long waves,and are closely linked to the surface CORW process.
文摘The role of small bowel capsule endoscopy (CE) in suspected small bowel bleedingis well established and current European and other international guidelinesposition it as the first line test after negative bidirectional endoscopies. Insuspected mid-lower gastrointestinal bleeding (MLGIB) the diagnostic yield ofcolonoscopy is poor and may cause a delay in detecting small bowel disease. Acrucial aspect of small bowel capsule endoscope performance is the timing of theprocedure, the interval between the bleeding episode and capsule ingestion isinversely related to the diagnostic yield as confirmed by a recent meta-analysis.Currently the ongoing advances achieved by video CE in particular to evaluateboth small bowel and colon in a single test using double headed capsules, raisesquestions regarding the position of pan intestinal capsule in the current algorithmto investigate patients presenting with suspected MLGIB ahead of colonoscopy.Early evidence suggests pan intestinal capsule could fit well as a diagnostic“filter” test in this cohort of patients, thereby reserving invasive conventionalcolonoscopy or device assisted enteroscopy as therapeutics options only. The recentdevelopment of magnetically controlled CE and a blood sensing capsule pushthe boundaries of CE even further in patients presenting with suspected gastrointestinalbleeding. This review will discuss the current available evidence andfuture directions of CE in suspected MLGIB.
文摘目的比较面部SMAS筋膜除皱术复合面部脂肪抽吸术与传统单纯面部SMAS筋膜除皱术的临床疗效及安全性。方法选取2021年6月至2023年6月河北承德玥莱美整形医院收治的54例中重度面部皮肤松弛患者,分为对照组(27例,行传统单纯面部SMAS筋膜除皱术)与观察组(27例,行面部SMAS筋膜除皱术复合面部脂肪抽吸术)。比较两组患者手术时间、术后肿胀恢复时间、除皱效果、长期效果(效果持久性)及患者满意度。结果对照组手术时间(4.0±0.5)h短于观察组(4.5±0.5)h,差异有统计学意义(P<0.01),对照组术后肿胀恢复时间(12.9±5.85)d短于观察组(15.8±8.05)d,差异有统计学意义(P=0.04)。观察组在改善口周隆起(0 vs 55.55%)、效果持久性(11.1%vs 37.0%)及患者满意度(96.3%vs 51.9%)方面均显著优于对照组,差异有统计学意义(P<0.05)。两组均未发生切口感染等严重并发症。结论面部SMAS筋膜除皱术复合面部脂肪抽吸术,可有效改善面颊和口周脂肪堆积,提升面部皮肤平整度与紧致度,延缓面部皮肤松弛进程,效果更持久,美学效果更佳,患者满意度更高。虽然手术时间及术后肿胀恢复期略长,但整体是面部SMAS筋膜除皱术的理想优化术式,值得推广。
文摘目的了解经肛全直肠系膜切除手术(transanal total mesorectal excision,TaTME)的短期临床效果,以为临床治疗决策提供依据。方法检索近年来国内外数据库中的相关文献,系统回顾TaTME操作平台在中低位直肠癌治疗中的应用现状,并从术中情况、术后短期恢复效果、术中及术后并发症、肿瘤学预后、学习曲线等方面进行分析,主要与腹腔镜TME(laparoscopic TME,LapTME)进行对比分析。结果传统的LapTME在盆腔及直肠周围精细操作时存在一定难度,尤其是在肥胖、骨盆狭窄、男性等“困难骨盆”患者中,相比之下,TaTME手术通过增强解剖平面的可视化,在减少术中出血、降低中转开腹率、加快术后短期恢复、改善手术标本质量等方面表现出一定优势。结论本综述分析的结果提示,TaTME手术安全性较高,它在短期疗效方面与LapTME手术更优或相当,为中低位直肠癌的外科治疗提供了新的手术方式选择。
基金Sponsored by Science and Technology Commission Foundation of Jiangsu Province of China(BA2010035)
文摘Three generation systems, namely, steam Rankine cycle （SRC）, organic Rankine cycle （ORC）, and steam-organic combined Rankine cycle （S-ORC）, were simulated using the Engineering Equation Solver fEES） to efficiently utilize flue gas emissions from 200 to 450 ℃ in iron and steel plants. Based on the simulation results for thermal efficiency, exergy efficiency, and power generation, the performances of the three power generation systems were compared and analyzed. To further utilize waste heat from the turbine exhaust steam of the ORC system, cas- cade （）RC （CORC） was designed for heat sources above 300 ℃. Based on a comprehensive performance comparison, the application of the ORC using R141b is preferable for 200 to 300 ℃ flue gas. For 300 to 450 ℃ flue gas, CORC is an alternative technology to improve the efficiency and quality of waste heat utilization. For flue gas above 450 ℃, S-ORC can achieve higher efficiency and power generation than conventional SRC, with a relatively small negative pressure and high dryness of the turbine outlet steam. Hence, S-ORC can be considered as a substitute for SRC.
文摘Background: NCCN’s guidelines for the diagnosis and treatment of rectal cancer suggest that accurate preoperative clinical staging of rectal cancer is very important. Reliable preoperative evaluation is the key to the development of surgical protocols, in order to investigate the diagnostic value of digital rectal diagnosis for lymph node metastasis of middle and low rectal cancer. Methods: We prospectively performed digital rectal examination in 258 patients with mid-low rectal cancer before operation, to analyze the distance from the lower margin of the tumor to the margin of the anus, the diameter of the invasion of the intestinal wall of the tumor, the accuracy between the general type and depth of invasion of the tumor and the pathological results of the postoperative specimen, and the predictability of the lymph node metastasis rate of the rectal digital examination. Results: The results of the analysis showed that the above indicators and postoperative pathological findings have high accuracy. Conclusions: It is concluded that accurate and detailed digital rectal examination before operation can predict lymph node metastasis rate of mid-low rectal cancer at a higher level and accurately.
