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Totally laparoscopic bypass surgery for aortoiliac occlusive disease in China

Chinese Medical Journal 2013年第16期126卷 3069-3072页

作者： guo lian-rui GU Yong-quan QI Li-xing TONG Zhu WU Xin guo Jian-ming ZHANG Jian WANG Zhong-gao Department of Vascular Surgery Xuanwu Hospital Institute ofVascular Surgery Capital Medical University Beijing 100053 China

Background Totally laparoscopic aortic surgery is still in its infancy in *** of the factors preventing adoption of this technique is its steep learning *** objective of this study was to evaluate the feasibility and safety of laparoscopic surgery for aortoiliac occlusive disease （AIOD）.Methods From November 2008 to November 2012,12 patients were treated for severe AIOD with a totally laparoscopic bypass surgery at our university *** demographic data,operative data,postoperative recovery data,morbidity and mortality were analyzed and compared with those of conventional open *** Twelve totally laparoscopic aortic surgery procedures,including two iliofemoral bypasses （IFB）,three unilateral aortofemoral bypasses （UAFB）,and seven aortobifemoral bypasses （ABFB）,were *** to open procedures was required in three *** mean operation time was 518 （range,325-840） minutes,mean blood loss was 962 （range,400-2500） ml,and mean aortic anastomosis time was 75 （range,40-150） *** with conventional open approach for aortofemoral bypasses performed concomitantly during this period,laparoscopic patients required fewer narcotics and a shorter in-hospital stay and earlier *** complications developed in four patients,including a single patient with transient left hydronephrosis,ischemic colonic fistula and pneumonia,residual aortic stenosis proximal to the anastomotic site,and asymptomatic partial left renal *** patients recovered and were discharged on postoperative Days 7-14 except one patient that died of respiratory failure on Day *** grafts were patent with follow-up imaging performed by Duplex examination,with a mean follow-up time of 10.7 （range,2-61） *** Totally laparoscopic bypass surgery is a feasible and safe procedure forAIOD,but attention needs to be paid to improve laparoscopic skills of vascular surgery in order to minimize morbidity during the learning curv

关键词： aortoiliac occlusive disease aortic laparoscopy aortofemoral bypass

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Successful treatment of spontaneous rupture of the internal carotid artery in an acute promyelocytic leukemia patient using ultrasound-guided thrombin injection

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Chinese Medical Journal 2013年第2期126卷 389-390页

作者： LI Xue-feng GU Yong-quan HUA Yang HE Fu-liang ZHANG Jian LI Jian-xin guo lian-rui TONG Zhu WU Xin guo Jian-ming WANG Zhong-gao Department of Vascular Surgery Xuan Wu Hospital ofCapital Medical University Beijing 100053 China Department of Vascular Ultrasound Xuan Wu Hospital ofCapital Medical University Beijing 100053 China

Spontaneous rupture and bleeding from the carotid artery in acute promyelocytic leukemia （APL）patients leading to pseudoaneurysm （PSA） formation has not been reported. We first successfully treated an APL patient with leli internal carotid artery rupture during chemotherapy leading to PSA using ultrasound-guided thrombin iniection （UGTI）.

关键词： ultrasound-guided thromhin injection,nonlymphocytic leukemia carotid artery pseudoaneurysm

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Surgical treatment of 82 patients with diabetic lower limb ischemia by distal arterial bypass

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Chinese Medical Journal 2007年第2期120卷 106-109页

作者： GU Yong-quan ZHANG Jian QI Li-xing YU Heng-xi LI Jian-xin LI Xue-feng guo lian-rui LUO Tao CUI Shi-jun WANG Zhong-gao Department of Vascular Surgery Xuan Wu Hospital and Institute of Vascular Surgery Capital Medical University Beijing 100053 China

Background Diabetic lower limb ischemia is a serious complication of diabetes mellitus. This study was conducted to investigate the effectiveness of distal arterial bypass treatment in diabetic patients with lower limb ischemia. Methods From July 2000 to July 2004, 96 lower limbs of 82 diabetic patients （type 2） with severe lower limb ischemia were treated in Xuan Wu Hospital. Arterial bypass with femoro-popliteal polytetrafluoroethylene （PTFE） and graft-tibial autologous grafts was performed on 31 limbs （32.3%）. Popliteal-tibial artery bypass alone was performed on 22 limbs （22.9%）. Combined lilac artery stenting, femoro-popliteal artery PTFE graft bypass, and graft-tibial artery autologous graft bypass was performed on 12 limbs （12.5%）, and femoro-tibial artery graft bypass was performed on 10 limbs （10.4%）. Popliteal-tibial-pedal artery graft bypass was performed on 7 limbs （7.3%）. Results Arterial grafts in 92 limbs of 79 patients were patent on discharge. Three patients with 4 ischemic limbs （3.7%） died of respiratory failure 12 hours, 3 days and 7 days after operation respectively. Early operation success rate was 96.3% （79/82）. Graft patency rate of patients on discharge was 95.8% （92/96）. The short-term total effectiveness rate was 83.3% （80/96）. Foot ulcer healing rate was 35.7% （10/28）. 97.4% （75/77） patients were followed up for a mean of 13.5 months. The long-term total effective rate was 80.7% （71/88）. The total amputation rate was 4.5% （4/88）. Mortality was 4.5%. The total graft patency rate was 90.9% （80/88）.Conclusion In the treatment of diabetic foot, distal lower limb arterial bypass can help to avoid amputation or lower the amputation level, and may promote foot ulcer healing and improve patient＇s quality of life.

关键词： diabetic angiopathies diabetes complications lower extremity distal arterial bypass

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Parity-dependent skin effects and topological properties in the multilayer nonreciprocal Su−Schrieffer−Heeger structures

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Frontiers of physics 2024年第3期19卷 115-133页

作者： Jia-rui Li Cui Jiang Han Su Di Qi lian-lian Zhang Wei-Jiang Gong College of Sciences Northeastern UniversityShenyang 110819China Basic Department Shenyang Institute of EngineeringShenyang 110136China

We concentrate on the skin effects and topological properties in the multilayer non-Hermitian Su−Schrieffer−Heeger (SSH) structure, by taking into account the nonreciprocal couplings between the different sublattices in the unit cells. Following the detailed demonstration of the theoretical method, we find that in this system, the skin effects and topological phase transitions induced by nonreciprocal couplings display the apparent parity effect, following the increase of the layer number of this SSH structure. On the one hand, the skin effect is determined by the parity of the layer number of this SSH system, as well as the parity of the band index of the bulk states. On the other hand, for the topological edge modes, such an interesting parity effect can also be observed clearly. Next, when the parameter disorders are taken into account, the zero-energy edge modes in the odd-layer structures tend to be more robust, whereas the other edge modes are easy to be destroyed. In view of these results, it can be ascertained that the findings in this work promote to understand the influences of nonreciprocal couplings on the skin effects and topological properties in the multilayer SSH lattices.

关键词： multilayer SSH lattice nonreciprocal couplings band structure skin effect

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Plasma-exfoliated g-C_(3)N_(4) with oxygen doping: tailoring photocatalytic properties

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Frontiers of Chemical Science and Engineering 2024年第2期18卷 27-39页

作者： Yuxin Li Junxin guo rui Han Zhao Wang National Engineering Research Centre of Industry Crystallization Technology School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China

Heteroatom doping and defect engineering have been proposed as effective ways to modulate the energy band structure and improve the photocatalytic activity of g-C_(3)N_(4). In this work, ultrathin defective g-C_(3)N_(4) was successfully prepared using cold plasma. Plasma exfoliation reduces the thickness of g-C_(3)N_(4) from 10 nm to 3 nm, while simultaneously introducing a large number of nitrogen defects and oxygen atoms into g-C_(3)N_(4). The amount of doped O was regulated by varying the time and power of the plasma treatment. Due to N vacancies, O atoms formed strong bonds with C atoms, resulting in O doping in g-C_(3)N_(4). The mechanism of plasma treatment involves oxygen etching and gas expansion. Photocatalytic experiments demonstrated that appropriate amount of O doping improved the photocatalytic degradation of rhodamine B compared with pure g-C_(3)N_(4). The introduction of O optimized the energy band structure and photoelectric properties of g-C_(3)N_(4). Active species trapping experiments revealed ·O_(2)^(–) as the main active species during the degradation.

关键词： graphitic carbon nitride cold plasma oxygen doping nitrogen defect visible-light photocatalysis

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A new 4-Ti-added polyoxometalate

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Tungsten 2024年第2期6卷 465-471页

作者： Hai-Lou Li Chen lian guo-Yu Yang MOE Key Laboratory of Cluster Science School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 102488China

A new inorganic–organic hybrid 4-Ti-added polyoxometalate:[H_(2)N(CH_(3))_(2)]_(2)Na_(3)H_(5)[{Ti(C_(2)O_(4))(H_(2)O)}_(2){Ti(C_(2)O_(4))}_(2)(B-β-SbW_(9)O_(33))_(2)]·22H_(2)O(1)has been successfully made and further characterized by infrared spectroscopy,thermogravimetric analysis,powder X-ray diff raction and single-crystal X-ray diff *** polyoxoanion of 1 exhibits a Krebs-type structure that is constructed from two[B-β-SbW_(9)O_(33)]^(9)−fragments fused together by a belt of four additional Ti atoms decorated by oxalate ***,1 as a heterogeneous catalyst exhibits high activity for Knoevenagel condensation under mild reaction conditions.

关键词： Polyoxometalate Ti-added POM Krebs-type structure Knoevenagel condensation

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Dual-salt poly(tetrahydrofuran) electrolyte enables quasi-solid-state lithium metal batteries to operate at -30 ℃

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Journal of Energy Chemistry 2024年第9期96卷 456-463页

作者： Zhiyong Li Zhuo Li rui Yu Xin guo School of Materials Science and Engineering State Key Laboratory of Material Processing and Die&Mould TechnologyHuazhong University of Science and TechnologyWuhan 430074HubeiChina The State Key Laboratory of Refractories and Metallurgy and Institute of Advanced Materials and Nanotechnology Wuhan University of Science and TechnologyWuhan 430081HubeiChina

The stable operation of solid-state lithium metal batteries at low temperatures is plagued by severe restrictions from inferior electrolyte-electrode interface compatibility and increased energy barrier for Li^(+)***,we prepare a dual-salt poly(tetrahydrofuran)-based electrolyte consisting of lithium hexafluorophosphate and lithium difluoro(oxalato)borate(LiDFOB).The Li-salt anions(DFOB−)not only accelerate the ring-opening polymerization of tetrahydrofuran,but also promote the formation of highly ion-conductive and sustainable interphases on Li metal anodes without sacrificing the Li^(+)conductivity of electrolytes,which is favorable for Li^(+)transport kinetics at low *** of this polymer electrolyte in Li||LiFePO_(4)cells show 82.3%capacity retention over 1000 cycles at 30℃and endow stable discharge capacity at−30℃.Remarkably,the Li||LiFePO4 cells retain 52%of their room-temperature capacity at−20℃and 0.1 *** rational design of dual-salt polymer-based electrolytes may provide a new perspective for the stable operation of quasi-solid-state batteries at low temperatures.

关键词： Poly(tetrahydrofuran) Dual-salt electrolyte Solidel ectrolyte interphase Low-temperature operation Quasi-solid-state battery

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Weighted Composition Operators That Preserve Frames On Weighted Hardy Spaces

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Acta Mathematica Sinica,English Series 2024年第7期40卷 1645-1654页

作者： Ya Li Dong rui Liu guo Xiang Lu School of Mathematical Sciences and LPMC Nankai UniversityTianjin300071P.R.China School of Statistics and Mathematics Zhongnan University of Economics and LawWuhan430073P.R.China

In this paper, we characterize weighted composition operators that preserve frames on the weighted Hardy spaces in the unit disk. In particular, we obtain the symbol properties of the bounded invertible weighted composition operators. Moreover, we establish the equivalence between bounded invertible operators and frame-preserving operators. Furthermore, we show that weighted composition operator preserves frames if and only if it preserves the Riesz bases property. Additionally,we investigate the weighted composition operators that preserve tight or normalized tight frames on the Dirichlet space.

关键词： Weighted composition operators Weighted Hardy spaces frames invertible

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自体干细胞移植在治疗下肢缺血性疾病中的应用

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中华医学杂志 2005年第36期85卷 2536-2537页

作者：谷涌泉郭连瑞首都医科大学宣武医院血管外科首都医科大学血管外科研究所北京100053

自体干细胞移植治疗下肢缺血性疾病是近年来出现的一项新技术,其一出现就展示了诱人的前景,但也存在较多的问题.本文就应用这一新技术的注意事项作一介绍。

关键词：下肢缺血性疾病自体干细胞移植细胞移植治疗意事项出现

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Maximum Power Point Tracking Technology for PV Systems: Current Status and Perspectives

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Energy Engineering 2024年第8期121卷 2009-2022页

作者： Bo Yang rui Xie Zhengxun guo Faculty of Electric Power Engineering Kunming University of Science and TechnologyKunming650500China Intelligent Electric Power Grid Key Laboratory of Sichuan Province Chengdu610065China Foshan Graduate School of Innovation Northeastern UniversityFoshan528311China College of Information Science and Engineering Northeastern UniversityShenyang110819China

Maximum power point tracking(MPPT)technology plays a key role in improving the energy conversion efficiency of photovoltaic(PV)systems,especially when multiple local maximum power points(LMPPs)occur under partial shading conditions(PSC).It is necessary to modify the operating point efficiently and accurately with the help of MPPT technology to maximize the collected *** though a lot of research has been carried out and impressive progress achieved for MPPT technology,it still faces some challenges and ***,the mathematical model established for PV cells is not precise ***,the existing algorithms are often optimized for specific conditions and lack comprehensive adaptability to the actual operating ***,a single algorithm may not be able to give full play to its *** the end,the selection criteria for choosing the suitable MPPT algorithm/converter combination to achieve better performance in a given scenario is very ***,this paper systematically discusses the current research status and challenges faced by PV MPPT technology around the three aspects of MPPT models,algorithms,and hardware *** in-depth thinking and discussion,it also puts forward positive perspectives on future development,and five forward-looking solutions to improve the performance of PV systems MPPT are suggested.

关键词： PV systems MPPT partial shading condition DC-DC converter

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