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Impact of Percutaneous Transhepatic Biliary Drainage on Clinical Outcomes of Patients with Malignant Obstructive Jaundice Undergoing Laparoscopic Pancreaticoduodenectomy

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Current Medical Science 2021年第2期41卷 375-380页

作者： He-bin WANG feng peng Min WANG Ren-yi QIN feng ZHU Department of Biliary-Pancreatic Surgery Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Preoperative biliary drainage may increase the morbidity and mortality of *** on percutaneous transhepatic biliary drainage(PTBD)before laparoscopic pancreaticoduodenectomy(LPD),however,are *** aim of this study was to examine the impact of PTBD on clinical outcomes of patients with malignant obstructive jaundice undergoing *** data of 172 patients who had malignant obstructive jaundice and underwent LPD from 2014 to 2017 in our hospital were retrospectively ***,catheterrelated complications,postoperative complications,and oncological outcormes were collected and *** score matching was performed to minimize selection bias associated with the comparison of data between patients who underwent PTBD and then LPD(PTBD group),and those given LPD alone(LPD group).The results showed that,in the PTBD group relative to the LPD group,the operating time was significantly shortened(250.28±69.95 vs.278.58±86.51 min,P=0.0196),the intraopcrative blood loss was markedly reduced(271.96±403.47 vs.429.72±482.47 mL,P=0.022),and overall rates of complications(16.33%vs.36.49%,P=0.0025)including postoperative haemorrhage(2.04%vs.12.16%,P=0.0072)and delayed gastric emptying(4.08% vs.13.51%,P=0.0251)were greatly *** propensity score-matched analysis,with 48 patients enrolled in each group,revealed no statistically significant differences in operating duration(262.71±68.64 vs.280.25±83.52 min,P=0.264),intraoperative blood loss(290.21±407.71 vs.373.75±422.33 mL,P=0.327)and delayed gastric emptying(4.17% vs.12.50%,P=0.1396).PTBD group had lower incidences in overall complications(22.92% vs.39.58%,P=0.0481)and postoperative haemorrhage(2.08% vs.12.50%,P=0.0497)than LPD *** conclusion,patients with malignant obstructive jaundice may benefit from PTBD procedure before LPD in terms of perioperative outcomes.

关键词： percutaneous transhepatic biliary drainage laparoscopic pancreaticoduodenectomy jaundice complication propensity score matching

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Fast and Robust Stereo Vision Algorithm for Obstacle Detection

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Journal of Bionic Engineering 2008年第3期5卷 247-252页

作者： yi-peng Zhou Department of Automation Northwestern Polytechnic University Xian 710068 P. R. China

Binocular computer vision is based on bionics, after the calibration through the camera head by double-exposure image synchronization, access to the calculation of two-dimensional image pixels of the three-dimensional depth information. In this paper, a fast and robust stereo vision algorithm is described to perform in-vehicle obstacles detection and characterization. The stereo algorithm which provides a suitable representation of the geometric content of the road scene is described, and an in-vehicle embedded system is presented. We present the way in which the algorithm is used, and then report experiments on real situations which show that our solution is accurate, reliable and efficient. In particular, both processes are fast, generic, robust to noise and bad conditions, and work even with partial occlusion.

关键词： stereo vision vehicle dynamics visibility range image alignment

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Diagnosis and management of fulminant Wilson's disease: a single center's experience

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World Journal of Pediatrics 2016年第2期12卷 209-214页

作者： yi Tian Guo-Zhong Gong Xu Yang feng peng Liver Disease Research Center Second Xiangya Hospital of Central South UniversityChangsha 410011China

Background: Medical therapy is rarely effective inpatients with fulminant Wilson's disease (FWD). Livertransplantation is limited by the lack of donor liver inmost patients with FWD at the time of diagnosis. NewWilson's index, model for end-stage liver disease (MELD)and Child-Pugh score are useful tools for decisionmakingof liver transplantation;however, none of them isan independent decisive tool. It is worthwhile to explorea more effective and practical therapeutic strategy andreevaluate the prediction systems for patients with ***: Nine patients with FWD associated withhemolytic crisis and fulminant hepatic failure (FHF) wereinvestigated. The clinical presentation, prognostic scoreand medical therapies of the patients were ***: In 7 of the 9 patients with FWD who receivedthe comprehensive therapy of corticosteroid, copperchelatingagent (dimercaptopropansulfonate sodium)and therapeutic plasma exchange (TPE), 6 patientsrecovered from FHF. The remaining one had beenimproved through the comprehensive therapy but died ofsepticemia 51 days later. Two patients with spontaneousbacterial peritonitis (SBP) died from liver failure inthree or five hospital days without plasma exchangeor chelating therapy. All of the 9 patients with FWDpresented with acute hepatic failure, severe jaundice andmild to severe hemolytic anemia. No marked differencein the incidence of severe hemolytic anemia was detectedbetween the survival and deceased groups. However,the incidence and the degree of hepatic encephalopathy(HE) in the non-survival group were higher than thosein the survival group. Unlike the deceased group, thesurvival group had no complications induced by bacterialinfection. Compared to new Wilson's index, Child-Pughscore and MELD score, the variation of prothrombinactivity (PTA) between the survival and deceased groupswas more ***: For patients with FWD, the episodeof severe hepatic encephalopathy or/and spontaneousbacterial peritonitis indica

关键词： decoppering dimercaptopropansulfonate sodium fulminant hepatic failure therapeutic plasma exchange Wilson's disease

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Distributed Nonsmooth Convex Optimization over Markovian Switching Random Networks with Two Step-Sizes

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Journal of Systems Science & Complexity 2021年第4期34卷 1324-1344页

作者： yi peng LI Li Department of Control Science and Engineering Tongji Universityand Shanghai Institute of Intelligent Science and TechnologyTongji UniversityShanghai 200092China

This paper investigates the distributed convex optimization problem over a multi-agent system with Markovian switching communication *** objective function is the sum of each agent’s local nonsmooth objective function,which cannot be known by other *** communication network is assumed to switch over a set of weight-balanced directed graphs with a Markovian *** authors propose a consensus sub-gradient algorithm with two time-scale step-sizes to handle the Markovian switching topologies and the absence of global gradient *** proper selection of step-sizes,the authors prove the almost sure convergence of all agents’local estimates to the same optimal solution when the union graph of the Markovian network’states is strongly connected and the Markovian chain is *** convergence rate analysis is also given for specific *** are given to demonstrate the results.

关键词： Distributed optimization random graphs two time-scale algorithm

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Assembly of CdTe Quantum Dots and Photosystem II Multi- layer Films with Enhanced Photocurrent

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Chinese Journal of Chemistry 2017年第6期35卷 881-885页

作者： peng Cai yi Jia Xiyun feng Jiao Li Junbai Li Beijing National Laboratory for Molecule Sciences CAS Key Lab of Colloid lnterface and Chemical Thermody- namics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China Tobacco Research Institute of Chinese Academy of Agricultural Sciences Qingdao Shandong 266101 China

Photosystem II （PSII） is a photoactive protein that can drive water oxidation under light irradiation. Recently, PSII has been broadly investigated with the high demand on the bioenergy. Here, we demonstrate a facile approach for the fabrication of a photoactive electrode by the integration of PSII with quantum dots （QDs）/polyelectrolyte multilayers. The assembled QDs and PSII film with a polyelectrolyte based substrate via layer-by-layer assembly can remain the photoactivity of the PSII and broaden the absorption spectrum of PSII to produce a high photocur- rent yield. The co-assembly exhibits an obviously enhanced photocurrent under UV light irradiation. The proposed strategy can be considered for the reference and usage of PSII toward the solar energy conversion.

关键词： photosystem II quantum dots solar energy conversion layer-by-layer assembly energy transfer

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Design and Control of a Quasi-direct Drive Actuated Knee Exoskeleton

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Journal of Bionic Engineering 2022年第3期19卷 678-687页

作者： yi Long Yajun peng Foshan Graduate School of Northeastern University Foshan528000China Faculty of Robot Science and Engineering Northeastern UniversityShenyang110000China Zhongshan Walkbest Intelligent Medical Device Co.Ltd Zhongshan528400China

This paper describes the design and control of a portable and lightweight knee exoskeleton for people with knee *** knee exoskeleton is designed based on our custom quasi-direct drive actuation composed of a DC motor unit and a transmission mechanism encompassing three *** online gait generation method based on gait step calculation and direct measurement using Inertial Measurement Unit(IMU)sensors is proposed to provide continuous assistance during *** on the generated gait trajectory online,Active Disturbance Rejection Control(ADRC)incorporating the feedforward compensation approach is proposed to help the human leg move in consideration of external *** developed knee exoskeleton has been employed successfully to assist impaired users with knee dysfunction to walk in a health recovery *** experimental results indicate that the online gait generation method and the proposed control method are suitable for the knee *** maximum value of the target knee angular position is approximately 50°and the mean of the control torque for the knee joint is located in the interval of[−2 Nm,4 Nm].The developed knee exoskeleton has the potential to regain normal gait to improve strength and endurance during walking in their activities of daily life.

关键词： Exoskeleton Knee dysfunction Quasi-direct drive Active disturbance rejection control Gait generation

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Advancement of technology towards high-performance non-aqueous aluminum-ion batteries

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Journal of Energy Chemistry 2021年第6期30卷 169-188,I0005页

作者： Ting-Ting Wei Panpan peng Si-Yu Qi Yan-Rong Zhu Ting-feng yi School of Materials Science and Engineering Northeastern UniversityShenyang 110819LiaoningChina School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004HebeiChina Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao 066004HebeiChina

Al-ion batteries(AIBs) have been identified as one of the most hopeful energy storage systems after Li-ion batteries on account for the ultrahigh volumetric capacity,high safety and low cost from the rich abundance of ***,some inevitable shortcomings,such as the formation of passive oxide film,hydrogen side reactions and anode corrosion,finally limit the large-scale application of aqueous *** nonaqueous AIBs have been considered as one of most hopeful alternatives for high-powered electrochemical energy storage ***,various technical and scientific obstacles should be resolved because nonaqueous AIBs are still *** significant efforts have aimed to resolve these issues towards large-scale applications,and some important advancement has been *** the present review,we mainly intended to offer an overview of non-aqueous AIBs systems,and we comprehensively reviewed the recent research advancement of the cathode materials,anode materials electrolyte and collectors as well as the fundamental understanding of the functional *** addition,we have also analyzed several technical challenges and summarized the strategies used for overcoming the challenges in improving the electrochemical properties,including morphology control,surface engineering,doping and construction of composite electrodes as well as the charge storage mechanisms of the materials with different crystal *** last,future research orientation and development prospect of the AIBs are proposed.

关键词： Al-ion batteries Electrode Electrolyte Collector Electrochemical performance

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Effect of edge cracks on critical current degradation in REBCO tapes under tensile stress

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Superconductivity 2022年第1期1卷 52-62页

作者： Zhirong Yang yi Li peng Song Mingzhi Guan feng feng Timing Qu State Key Laboratory of Tribology Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China Department of Mechanical Engineering Advanced Manufacturing InstituteTexas Center for SuperconductivityUniversity of HoustonHoustonTX 77024USA Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Lab of Intelligent Manufacturing and Precision Machining Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China

The slitting process for manufacturing REBa2Cu3O7δ(REBCO,RE=Rare earth)tapes of required width significantly improves the production efficiency and reduces production ***,edge cracks induced by the slitting process of wide REBCO tapes may cause premature degradation under high tensile stress in highfield ***,it is necessary to evaluate the effect of edge cracks of REBCO tapes on the critical current(Ic)***,Ic degradation under artificial cracks was measured to validate the applicability of linear elastic fracture mechanics for the REBCO *** maximum circumferential stress criterion was used to derive the mixed-mode stress intensity factor of multiple oblique edge cracks.A semi-analytical model considering edge crack properties such as angleβ,spacing d,and length a,was built to evaluate the critical load and critical *** found that when the stress intensity factor at the crack tip is below KIC?2:3 MPa ffiffiffiffim p,edge cracks did not *** examined commercial REBCO tapes manufactured by two different processes,concluding that edge cracks in these tapes will not cause premature degradation.

关键词： REBCO Degradation Stress intensity factor Multiple oblique edge cracks Fracture toughness

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Swelling of Spherical Polyelectrolyte Gels

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Chinese Journal of Polymer Science 2024年第9期42卷 1386-1392,I0009页

作者： Ming-Yu Duan Jia-Dong Chen yi-Ming Liu Zhao-feng peng Guang Chen Department of Advanced Manufacturing and Robotics College of EngineeringPeking UniversityBeijing 100871China

Polyelectrolyte(PE)gels,distinguished by their unique stimuli-responsive swelling behavior,serve as the basis of broad applications,such as artificial muscles and drug *** this work,we present a theoretical model to analyze the electrostatics and its contribution to the swelling behavior of PE gels in salt *** minimizing the free energy of PE gels,we obtain two distinct scaling regimes for the swelling ratio at equilibrium with respect to the salt *** compare our predictions for the swelling ratio with experimental measurements,which show excellent *** addition,we employ a finite element method to assess the applicability range of our theoretical model and *** anticipate that our model will also provide valuable insights into drug adsorption and release,deformation of red blood cells,4D printing and soft robotics,where the underlying mechanism of swelling remains enigmatic.

关键词： Gels Polyelectrolytes Swelling Stimuli-responsive Electrostatic interaction Cell model

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Application value of enhanced recovery after surgery for total laparoscopic uncut Roux-en-Y gastrojejunostomy after distal gastrectomy

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World Journal of Gastroenterology 2018年第4期24卷 504-510页

作者： yi-feng Zang feng-Zhou Li Zhi-peng Ji yin-Lu Ding Department of General Surgery The Second Hospital of Shandong University

AIM To evaluate the safety and feasibility of enhanced recovery after surgery(ERAS) for total laparoscopic uncut Roux-en-Y gastrojejunostomy after distal *** The clinical data of 42 patients who were divided into an ERAS group(n = 20) and a control group(n = 22) were collected. The observed indicators included operation conditions, postoperative clinical indexes, and postoperative serum stress indexes. Measurement data following a normal distribution are presented as mean ± SD and were analyzed by t-test. Count data were analyzed by χ~2 *** The operative time, volume of intraoperative blood loss, and number of patients with conversion to opensurgery were not significantly different between the two groups. Postoperative clinical indexes, including the time to initial anal exhaust, time to initial liquid diet intake, time to out-of-bed activity, and duration of hospital stay of patients without complications, were significantly different between the two groups(t = 2.045, 8.685, 2.580, and 4.650, respectively, P < 0.05 for all). However, the time to initial defecation, time to abdominal drainage-tube removal, and the early postoperative complications were not significantly different between the two groups. Regarding postoperative complications, on the first and third days after the operation, the white blood cell count(WBC) and C reactive protein(CRP) and interleukin-6(IL-6) levels in the ERAS group were significantly lower than those in the control *** The perioperative ERAS program for total laparoscopic uncut Roux-en-Y gastrojejunostomy after distal gastrectomy is safe and effective and should be popularized. Additionally, this program can also reduce the duration of hospital stay and improve the degree of comfort and satisfaction of patients.

关键词： Distal gastrectomy Enhanced recovery after surgery Perioperative period Uncut Roux-en-Y gastrojejunostomy

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