This paper is concerned with the minimizers of L^(2)-subcritical constraint variar tional problems with spatially decaying nonlinearities in a bounded domain Ω of R~N(N≥1).We prove that the problem admits minimizers...This paper is concerned with the minimizers of L^(2)-subcritical constraint variar tional problems with spatially decaying nonlinearities in a bounded domain Ω of R~N(N≥1).We prove that the problem admits minimizers for any M> 0.Moreover,the limiting behavior of minimizers as M→∞ is also analyzed rigorously.展开更多
A sequential three-step programming method is proposed for determining the minimum flowrate of fresh water and corresponding regenerated water in water-using system of single contaminant with regeneration reuse. In st...A sequential three-step programming method is proposed for determining the minimum flowrate of fresh water and corresponding regenerated water in water-using system of single contaminant with regeneration reuse. In step 1, a programming with the objective of min fws is used to determine the minimum flowrate of fresh water, in which the mathematical representation is a mixed integer nonlinear programming (MINLP1). Then under the same constraints with step 1, a programming with the objective of min freg in step 2 and a programming with the objective of min Cr in step 3 are subsequently used to determine the minimum flowrate of regenerated water and the minimum inlet concentration to regeneration process corresponding to the minimum flowrate of fresh water based on step 1. The method is easy to apply because we only need to change the objective function but keep the constraints constant to go along the following steps after step 1. In addition, the relationship between the fresh water flowrate required, fws and inlet concentration to regeneration process, Cr, is investigated. It is found that there exist three relationships between fws and Cr, which indicate three possibilities for C\>: below the pinch, above the pinch or at the pinch. Therefore, a new conclusion is drawn, which differs from that 'regeneration of water at pinch minimizes fresh water flowrate' derived in literature and indicates that in some cases, regeneration at other point also minimizes fresh water flowrate.展开更多
In this paper, we study the upper bounds on the mass insertion parameters （δAB^q）ij in the minimal super symmetric standard model. We found that the information from the measured branching ratio of B→ X8γ, X8l＋l...In this paper, we study the upper bounds on the mass insertion parameters （δAB^q）ij in the minimal super symmetric standard model. We found that the information from the measured branching ratio of B→ X8γ, X8l＋l- decay can help us to improve the upper bounds on the mass insertions parameters （δAB^u,d）3j,i3 Some regions allowed by the data of Br（B→ X8γ） are excluded by the requirement of an SM-like C7γ （rnb） imposedby the data of Br（B→ X8γ, X8l＋l- ）.展开更多
目的比较机器人与胸腔镜手术治疗前纵隔肿物的近期临床疗效,探讨机器人辅助前纵隔肿物切除的优势。方法采用回顾性队列研究的方法,收集2016年10月至2018年9月陆军军医大学(第三军医大学)大坪医院收治的111例行微创前纵隔肿物切除手术患...目的比较机器人与胸腔镜手术治疗前纵隔肿物的近期临床疗效,探讨机器人辅助前纵隔肿物切除的优势。方法采用回顾性队列研究的方法,收集2016年10月至2018年9月陆军军医大学(第三军医大学)大坪医院收治的111例行微创前纵隔肿物切除手术患者的临床病理资料。111例患者中,56例行达芬奇机器人手术,设为机器人组;55例行电视胸腔镜手术,设为胸腔镜组。对两组患者的病变直径、直径≥5 cm例数、手术时间、术中失血量、中转开胸率、术后引流量、术后胸引天数、联合扩大切除例数、术后住院日、并发症发生率和住院费用进行比较分析。结果全组患者均顺利完成手术,无围术期死亡。机器人组对比胸腔镜组,在病变直径[(4.6±2.2)vs(3.3±1.6)cm,P=0.002]、直径≥5 cm比例(22/56 vs 11/55,P=0.026)、术中失血量[(54.1±51.6)vs(89.9±91.0) mL,P=0.013]、联合扩大切除率(8/56 vs 1/55,P=0.04)、住院费用[(7.5±2.0)vs(4.2±1.4)万元,P<0.001]方面差异有统计学意义;两组在手术时间、中转开胸率、术后引流量、术后胸引天数、术后住院日、并发症发生率上差异均无统计学意义(P>0.05)。结论机器人辅助前纵隔肿物切除术安全可行,但费用较高;与胸腔镜手术比较出血更少,在大血管周围和深部狭小空间内操作有一定优势,对直径较大或有明显外侵需联合大血管切除的前纵隔肿瘤更为适用。展开更多
基金supported by the Graduate Education Innovation Funds(2022CXZZ088)at Central China Normal University in Chinasupported by the NSFC(12225106,11931012)the Fundamental Research Funds(CCNU22LJ002)for the Central Universities in China。
文摘This paper is concerned with the minimizers of L^(2)-subcritical constraint variar tional problems with spatially decaying nonlinearities in a bounded domain Ω of R~N(N≥1).We prove that the problem admits minimizers for any M> 0.Moreover,the limiting behavior of minimizers as M→∞ is also analyzed rigorously.
基金Supported by the National Fundamental Research Development Program of China(No.2000026308).
文摘A sequential three-step programming method is proposed for determining the minimum flowrate of fresh water and corresponding regenerated water in water-using system of single contaminant with regeneration reuse. In step 1, a programming with the objective of min fws is used to determine the minimum flowrate of fresh water, in which the mathematical representation is a mixed integer nonlinear programming (MINLP1). Then under the same constraints with step 1, a programming with the objective of min freg in step 2 and a programming with the objective of min Cr in step 3 are subsequently used to determine the minimum flowrate of regenerated water and the minimum inlet concentration to regeneration process corresponding to the minimum flowrate of fresh water based on step 1. The method is easy to apply because we only need to change the objective function but keep the constraints constant to go along the following steps after step 1. In addition, the relationship between the fresh water flowrate required, fws and inlet concentration to regeneration process, Cr, is investigated. It is found that there exist three relationships between fws and Cr, which indicate three possibilities for C\>: below the pinch, above the pinch or at the pinch. Therefore, a new conclusion is drawn, which differs from that 'regeneration of water at pinch minimizes fresh water flowrate' derived in literature and indicates that in some cases, regeneration at other point also minimizes fresh water flowrate.
基金The project partly supported by National Natural Science Foundation of China under Grant Nos. 10275035 and 10575052 and the Research Foundation of Nanjing Normal University under Grant No. 214080A916 .
文摘In this paper, we study the upper bounds on the mass insertion parameters （δAB^q）ij in the minimal super symmetric standard model. We found that the information from the measured branching ratio of B→ X8γ, X8l＋l- decay can help us to improve the upper bounds on the mass insertions parameters （δAB^u,d）3j,i3 Some regions allowed by the data of Br（B→ X8γ） are excluded by the requirement of an SM-like C7γ （rnb） imposedby the data of Br（B→ X8γ, X8l＋l- ）.
文摘目的比较机器人与胸腔镜手术治疗前纵隔肿物的近期临床疗效,探讨机器人辅助前纵隔肿物切除的优势。方法采用回顾性队列研究的方法,收集2016年10月至2018年9月陆军军医大学(第三军医大学)大坪医院收治的111例行微创前纵隔肿物切除手术患者的临床病理资料。111例患者中,56例行达芬奇机器人手术,设为机器人组;55例行电视胸腔镜手术,设为胸腔镜组。对两组患者的病变直径、直径≥5 cm例数、手术时间、术中失血量、中转开胸率、术后引流量、术后胸引天数、联合扩大切除例数、术后住院日、并发症发生率和住院费用进行比较分析。结果全组患者均顺利完成手术,无围术期死亡。机器人组对比胸腔镜组,在病变直径[(4.6±2.2)vs(3.3±1.6)cm,P=0.002]、直径≥5 cm比例(22/56 vs 11/55,P=0.026)、术中失血量[(54.1±51.6)vs(89.9±91.0) mL,P=0.013]、联合扩大切除率(8/56 vs 1/55,P=0.04)、住院费用[(7.5±2.0)vs(4.2±1.4)万元,P<0.001]方面差异有统计学意义;两组在手术时间、中转开胸率、术后引流量、术后胸引天数、术后住院日、并发症发生率上差异均无统计学意义(P>0.05)。结论机器人辅助前纵隔肿物切除术安全可行,但费用较高;与胸腔镜手术比较出血更少,在大血管周围和深部狭小空间内操作有一定优势,对直径较大或有明显外侵需联合大血管切除的前纵隔肿瘤更为适用。
