Oil product pipelines have features such as transporting multiple materials, ever-changing operating conditions, and synchronism between the oil input plan and the oil offloading plan. In this paper, an optimal model ...Oil product pipelines have features such as transporting multiple materials, ever-changing operating conditions, and synchronism between the oil input plan and the oil offloading plan. In this paper, an optimal model was established for a single-source multi-distribution oil pro- duct pipeline, and scheduling plans were made based on supply. In the model, time node constraints, oil offloading plan constraints, and migration of batch constraints were taken into consideration. The minimum deviation between the demanded oil volumes and the actual offloading volumes was chosen as the objective function, and a linear programming model was established on the basis of known time nodes＇ sequence. The ant colony optimization algo- rithm and simplex method were used to solve the model. The model was applied to a real pipeline and it performed well.展开更多
The family Mesopsychidae Tillyard, 1917 presently consists of ten described genera from the Early Permian to the Early Cretaceous of Australia, China, Kyrgyzstan, Russia, South Africa, Tajikistan, and Ukraine. Herein,...The family Mesopsychidae Tillyard, 1917 presently consists of ten described genera from the Early Permian to the Early Cretaceous of Australia, China, Kyrgyzstan, Russia, South Africa, Tajikistan, and Ukraine. Herein, a new genus and a new species of fossil mesopsyehid, Epicharmesopsyche pentavenulosa gen. et sp. nov., is described from the Middle Jurassic Jiulongshan Formation of Inner Mongolia, China, supplementing the family-level diversity. The well-preserved, new material reveals many characters, including antennae, wing venation, shape and genitalia that increase our morphological understanding of the family, although unfortunately the mouthparts and most of the legs are not preserved. Diagnosis of the Mesopsychidae is emended to include a four- or five-branched MP in both the fore- and hind wings. This is the first documentation of a wing coupling structure in the Mesopsychidae, consisting of three to four frenula bristles on the humeral lobe at the base of the costal margin of both hind wings. Asymmetrical shape and size of the left and right wings on a specimen of E. pentavenulosa gen. et sp. nov., seems to be a common condition for mesopsychid taxa from northeastern China.展开更多
Objective:Clinical practice guidelines recommend open adrenalectomy(OA)for large pheochromocytoma(LPCC)>6 cm in size.Although laparoscopic adrenalectomy(LA)for the treatment of LPCC has been reported,its role remai...Objective:Clinical practice guidelines recommend open adrenalectomy(OA)for large pheochromocytoma(LPCC)>6 cm in size.Although laparoscopic adrenalectomy(LA)for the treatment of LPCC has been reported,its role remains unclear.This study aimed to compare the effectiveness of LA and OA,and summary the surgical treatment experience.Methods:Data concerning LPCC,from January 2010 to June 2019 of a single institution,were retrospectively reviewed.Altogether 82 patients with a tumor larger than 6 cm were included(52 patients in LA group and 30 patients in OA group).Groups were balanced by propensity score matching(PSM)into 15 pairs.Patients’demographics,preoperative characteristics,and prognosis were analyzed.Results:Before PSM,the OA group had larger tumor sizes(median[interquartile range,IQR]:8.9[7.3-10.3]vs.7.2[6.7-8.0]cm;p=0.000)and higher vanillylmandelic acid level(median[IQR]:114.3[67.8-326.4]vs.66.6[37.8-145.8]μmol/24 h;p=0.004)and needed a higher cumulative dose of prazosin(median[IQR]:83.5[37.0-154.0]vs.38.0[21.0-81.0]mg;p=0.028).After PSM,the baseline data showed no significant differences between both groups.The LA group had relatively more stable blood pressure in surgery,with a lower fluctuation of systolic blood pressure(mean±standard deviation[SD]:70.9±25.1 vs.107.4±46.2 mmHg,p=0.012)and a lower percentage of hemodynamic instability(46.7%vs.86.7%,p=0.020).The LA group had shorter postoperative hospital stays(mean±SD:6.4±2.7 vs.10.1±3.4 days;p=0.003)than the OA group.Differences regarding metastasis rate(6.7%vs.0,p=1.000)were not statistically significant between LA and OA groups.The median(IQR)follow-up time of 82 patients was 72.5(47.0-103.5)months.Binary logistic regression showed that right-side tumors or those>8 cm in size were independent risk factors of OA.Conclusion:LA is a safe,minimally invasive procedure for LPCC and has relatively better perioperative characteristics in large medical centers.Patients with tumors on the right side or larger than 8 cm are more likely to undergo OA initially.展开更多
目的,探讨经食管黏膜下隧道内镜治疗大面积食管黏膜病变的应用价值。方法,徐州医科大学附属淮安医院2015年1月至2017年7月经胃镜及病理诊断大面积食管高级别上皮内瘤变18例,采用随机数字表法分为传统内镜黏膜下剥离术(endoscopic submuc...目的,探讨经食管黏膜下隧道内镜治疗大面积食管黏膜病变的应用价值。方法,徐州医科大学附属淮安医院2015年1月至2017年7月经胃镜及病理诊断大面积食管高级别上皮内瘤变18例,采用随机数字表法分为传统内镜黏膜下剥离术(endoscopic submucosal dissection,ESD)法及经食管黏膜下隧道法切除病变,对比及随访观察治疗效果。结果,隧道组均于术中一次性完整剥离切除,一次性整块切除率均为100%,经典ESD组1例圈套器辅助分片切除,一次性整块切除率均为88.9%,术后病理结果提示所有切除标本的侧切缘和基底切缘无肿瘤累及。病变切除的平均直径隧道组为(7.5±3.2)cm,经典ESD组为(8.3±1.4)cm,2组在病变切除面积差异无统计学意义( P >0.05);平均手术时间隧道组为(50.4±28.0)min,经典ESD组为手术时间(82.5±29.7)min,2组在一次性整块切除率、平均手术时间方面,差异有统计学意义( P <0.05)。隧道技术组术中无1例皮下气肿;剥离过程无环形肌受伤害;经典ESD组术中出现纵隔、皮下气肿2例,其中小穿孔的1例应用钛夹缝合,术后3 d气肿均自行消失,术后24 h内出现发热1例,伴有白细胞升高,抗炎对症处理后第2天完全缓解,差异有统计学意义( P <0.05)。结论,内镜经食管黏膜下隧道技术是大面积食管黏膜病变切除安全有效的方法,能有效降低内镜下病变切除的难度,缩短手术时间,减少并发症发生。展开更多
ELP3,the catalytic subunit of the Elongator complex,is an acetyltransferase and associated with tumor progression.However,the detail of ELP3 oncogenic function remains largely unclear.Here,we found that ELP3 stabilize...ELP3,the catalytic subunit of the Elongator complex,is an acetyltransferase and associated with tumor progression.However,the detail of ELP3 oncogenic function remains largely unclear.Here,we found that ELP3 stabilizes c-Myc to promote tumorigenesis in an acetyltransferase-independent manner.Mechanistically,ELP3 competes with the E3-ligase FBXW7βfor c-Myc binding,resulting in the inhibition of FBXW7β-mediated ubiquitination and proteasomal degradation of c-Myc.ELP3 knockdown diminishes glycolysis and glutaminolysis and dramatically retards cell proliferation and xenograft growth by downregulating c-Myc,and such effects are rescued by the reconstitution of c-Myc expression.Moreover,ELP3 and c-Myc were found overexpressed with a positive correlation in colorectal cancer and hepatocellular carcinoma.Taken together,we elucidate a new function of ELP3 in promoting tumorigenesis by stabilizing c-Myc,suggesting that inhibition of ELP3 is a potential strategy for treating c-Myc-driven carcinomas.展开更多
基金part of the Program of"Study on the mechanism of complex heat and mass transfer during batch transport process in products pipelines"funded under the National Natural Science Foundation of China(grant number 51474228)
文摘Oil product pipelines have features such as transporting multiple materials, ever-changing operating conditions, and synchronism between the oil input plan and the oil offloading plan. In this paper, an optimal model was established for a single-source multi-distribution oil pro- duct pipeline, and scheduling plans were made based on supply. In the model, time node constraints, oil offloading plan constraints, and migration of batch constraints were taken into consideration. The minimum deviation between the demanded oil volumes and the actual offloading volumes was chosen as the objective function, and a linear programming model was established on the basis of known time nodes＇ sequence. The ant colony optimization algo- rithm and simplex method were used to solve the model. The model was applied to a real pipeline and it performed well.
基金supported by the National Basic Research Program of China (973 Program) (2012CB821906)National Natural Science Foundation of China (No. 31230065, 31272352, 41272006)+1 种基金Project of Great Wall Scholar and KEY project of Beijing Municipal Commission of Education (grants KZ201310028033)China Geological Survey (grant 1212011120115)
文摘The family Mesopsychidae Tillyard, 1917 presently consists of ten described genera from the Early Permian to the Early Cretaceous of Australia, China, Kyrgyzstan, Russia, South Africa, Tajikistan, and Ukraine. Herein, a new genus and a new species of fossil mesopsyehid, Epicharmesopsyche pentavenulosa gen. et sp. nov., is described from the Middle Jurassic Jiulongshan Formation of Inner Mongolia, China, supplementing the family-level diversity. The well-preserved, new material reveals many characters, including antennae, wing venation, shape and genitalia that increase our morphological understanding of the family, although unfortunately the mouthparts and most of the legs are not preserved. Diagnosis of the Mesopsychidae is emended to include a four- or five-branched MP in both the fore- and hind wings. This is the first documentation of a wing coupling structure in the Mesopsychidae, consisting of three to four frenula bristles on the humeral lobe at the base of the costal margin of both hind wings. Asymmetrical shape and size of the left and right wings on a specimen of E. pentavenulosa gen. et sp. nov., seems to be a common condition for mesopsychid taxa from northeastern China.
文摘Objective:Clinical practice guidelines recommend open adrenalectomy(OA)for large pheochromocytoma(LPCC)>6 cm in size.Although laparoscopic adrenalectomy(LA)for the treatment of LPCC has been reported,its role remains unclear.This study aimed to compare the effectiveness of LA and OA,and summary the surgical treatment experience.Methods:Data concerning LPCC,from January 2010 to June 2019 of a single institution,were retrospectively reviewed.Altogether 82 patients with a tumor larger than 6 cm were included(52 patients in LA group and 30 patients in OA group).Groups were balanced by propensity score matching(PSM)into 15 pairs.Patients’demographics,preoperative characteristics,and prognosis were analyzed.Results:Before PSM,the OA group had larger tumor sizes(median[interquartile range,IQR]:8.9[7.3-10.3]vs.7.2[6.7-8.0]cm;p=0.000)and higher vanillylmandelic acid level(median[IQR]:114.3[67.8-326.4]vs.66.6[37.8-145.8]μmol/24 h;p=0.004)and needed a higher cumulative dose of prazosin(median[IQR]:83.5[37.0-154.0]vs.38.0[21.0-81.0]mg;p=0.028).After PSM,the baseline data showed no significant differences between both groups.The LA group had relatively more stable blood pressure in surgery,with a lower fluctuation of systolic blood pressure(mean±standard deviation[SD]:70.9±25.1 vs.107.4±46.2 mmHg,p=0.012)and a lower percentage of hemodynamic instability(46.7%vs.86.7%,p=0.020).The LA group had shorter postoperative hospital stays(mean±SD:6.4±2.7 vs.10.1±3.4 days;p=0.003)than the OA group.Differences regarding metastasis rate(6.7%vs.0,p=1.000)were not statistically significant between LA and OA groups.The median(IQR)follow-up time of 82 patients was 72.5(47.0-103.5)months.Binary logistic regression showed that right-side tumors or those>8 cm in size were independent risk factors of OA.Conclusion:LA is a safe,minimally invasive procedure for LPCC and has relatively better perioperative characteristics in large medical centers.Patients with tumors on the right side or larger than 8 cm are more likely to undergo OA initially.
文摘目的,探讨经食管黏膜下隧道内镜治疗大面积食管黏膜病变的应用价值。方法,徐州医科大学附属淮安医院2015年1月至2017年7月经胃镜及病理诊断大面积食管高级别上皮内瘤变18例,采用随机数字表法分为传统内镜黏膜下剥离术(endoscopic submucosal dissection,ESD)法及经食管黏膜下隧道法切除病变,对比及随访观察治疗效果。结果,隧道组均于术中一次性完整剥离切除,一次性整块切除率均为100%,经典ESD组1例圈套器辅助分片切除,一次性整块切除率均为88.9%,术后病理结果提示所有切除标本的侧切缘和基底切缘无肿瘤累及。病变切除的平均直径隧道组为(7.5±3.2)cm,经典ESD组为(8.3±1.4)cm,2组在病变切除面积差异无统计学意义( P >0.05);平均手术时间隧道组为(50.4±28.0)min,经典ESD组为手术时间(82.5±29.7)min,2组在一次性整块切除率、平均手术时间方面,差异有统计学意义( P <0.05)。隧道技术组术中无1例皮下气肿;剥离过程无环形肌受伤害;经典ESD组术中出现纵隔、皮下气肿2例,其中小穿孔的1例应用钛夹缝合,术后3 d气肿均自行消失,术后24 h内出现发热1例,伴有白细胞升高,抗炎对症处理后第2天完全缓解,差异有统计学意义( P <0.05)。结论,内镜经食管黏膜下隧道技术是大面积食管黏膜病变切除安全有效的方法,能有效降低内镜下病变切除的难度,缩短手术时间,减少并发症发生。
基金supported by grants from China Postdoctoral Science Foundation(2022M712672)the National Natural Science Foundation of China(U21A20373 and 32070749).
文摘ELP3,the catalytic subunit of the Elongator complex,is an acetyltransferase and associated with tumor progression.However,the detail of ELP3 oncogenic function remains largely unclear.Here,we found that ELP3 stabilizes c-Myc to promote tumorigenesis in an acetyltransferase-independent manner.Mechanistically,ELP3 competes with the E3-ligase FBXW7βfor c-Myc binding,resulting in the inhibition of FBXW7β-mediated ubiquitination and proteasomal degradation of c-Myc.ELP3 knockdown diminishes glycolysis and glutaminolysis and dramatically retards cell proliferation and xenograft growth by downregulating c-Myc,and such effects are rescued by the reconstitution of c-Myc expression.Moreover,ELP3 and c-Myc were found overexpressed with a positive correlation in colorectal cancer and hepatocellular carcinoma.Taken together,we elucidate a new function of ELP3 in promoting tumorigenesis by stabilizing c-Myc,suggesting that inhibition of ELP3 is a potential strategy for treating c-Myc-driven carcinomas.
