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New perspectives on robotic pancreaticoduodenectomy:An analysis of the National Cancer Database

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World journal of Gastrointestinal Surgery 2023年第1期15卷 60-71页

作者： Aleksandr Kalabin Vishnu R Mani Robin L Kruse Chase Schlesselman Kai Yu Li Kevin F Staveley-O'Carroll Eric t Kimchi Department of Surgery University of MissouriColumbiaMO 65212United States Department of Surgery The Johns Hopkins HospitalBaltimoreMD 21287United States

BACKGROUND Pancreatic ductal adenocarcinoma is a common *** all advancements,the prognosis remains,poor with an overall 5-year survival of only 10.8%.Recently,a robotic platform has become an attractive tool for treating pancreatic cancer(PC).While recent studies indicated improved lymph node(LN)harvest during robotic pancreaticoduodenectomy(PD),data on long-term outcomes are *** to evaluate absolute LN harvest during *** outcomes included evaluating the association between LN harvest and short-and long-term oncological outcomes for three different surgical *** We conducted an analysis of the National Cancer Database,including patients diagnosed with PC who underwent open,laparoscopic,or robotic PD in ***-way analysis of variance was used to compare continuous variables,chi-square test-for *** survival was defined as the time between surgery and *** survival time was estimated with the Kaplan-Meier method,and groups were compared with the Wilcoxon test.A Cox proportional hazards model was used to assess the association of covariates with survival after controlling for patient characteristics and procedure *** 17169 patients were included,8859(52%)males;mean age 65;14509(85%)white.13816(80.5%)patients had an open PD,2677(15.6%)and 676(3.9%)-laparoscopic and robotic PD *** comorbidity index(Charlson-Deyo Score)*** average,18.84 LNs were *** LN harvest during open,laparoscopic and robotic PD was 18.59,19.65 and 20.70 respectively(Ptive for cancer and did not differ by the procedure type(P=0.26).Vascular invasion was noted in 42.6%of LNs and did differ by the approach:42.1%for open,44.0%for laparoscopic and 47.2%for robotic PD(P=0.015).Median survival for open PD was 26.1 mo,laparoscopic-27.2 mo,robotic-29.1 mo(P=0.064).Survival was associated with higher LN harvest,while higher number of positive LNs was assoc

关键词： Pancreatic cancer Pancreaticoduodenectomy Robotic surgery National Cancer Database

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铝合金的淬火系数分析法(2)

轻合金加工技术 1989年第11期17卷 27-35,43页

作者： j.t.Staley 顾孔君

四、淬火系数分析法的应用 1、卧式热处理装置的设计淬火系数分析法首先被用来根据冷却曲线预测AA2024-t4合金的腐蚀形式.这是一个重要的工业性的问题,因为当时第一个大型卧式薄板连续热处理炉正在设计.在设计这种薄板材淬火设备的时候... 详细信息

四、淬火系数分析法的应用 1、卧式热处理装置的设计淬火系数分析法首先被用来根据冷却曲线预测AA2024-t4合金的腐蚀形式.这是一个重要的工业性的问题,因为当时第一个大型卧式薄板连续热处理炉正在设计.在设计这种薄板材淬火设备的时候,有很多可供选用的建议.目的是使淬火薄板得到最好的性能和最小的翘曲.设计师们已有一种模型,按该模型,采用两阶段淬火法可以减少翘曲,即初始阶段的低速淬火和随后的高速淬火.然而,没有一种模型能预测沉淀硬化铝合金经不同流程淬火后的性能.

关键词：铝合金淬火系数分析

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艺术创作的环境

新美术 1997年第1期18卷 53-56页

作者： t·j·克拉克石炯

倘若我开口就说艺术史危在旦夕,这未免过于刺耳了.如果说艺术史已奄奄一息,名存而实亡,也许更为切情.无论如何,无论以何种方式表述,这都会是一个普通的诊断,陈腐的指责,老一套的嗤笑.因此,第一个要问的问题可能是:为何艺术史的问题至关... 详细信息

倘若我开口就说艺术史危在旦夕,这未免过于刺耳了.如果说艺术史已奄奄一息,名存而实亡,也许更为切情.无论如何,无论以何种方式表述,这都会是一个普通的诊断,陈腐的指责,老一套的嗤笑.因此,第一个要问的问题可能是:为何艺术史的问题至关重要?我有何种理由要求别人严肃对待这些问题?要回答那个问题,我不得不提醒大家,也提醒我自己,艺术史一度是何种样子的.1922年,卢卡奇[Lukacs]写过一篇伟大的论文《物化和无产阶级意识》[Reification and the Conscious-ness of the Proletariat],其中有一段话深深地印入了我的脑海,可以帮助我们构想出一个不同的时代:“然而,正如19世纪真正重要的历史学家,诸如李格尔、狄尔泰、德沃夏克所注意到的那样,历史的本质正是存在于那些结构形式所经历的变迁之中.这些结构形式是人类与环境在任何既定时刻发生相互作用的关键所在,也决定了人类内在与外在生活的客观本质.但是,只有当个性。

关键词：艺术创作艺术史思想观念艺术社会史意识观念黑格尔李格尔艺术家卢卡奇艺术作品

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锋芒无限

车主之友 2011年第11期 250-255页

作者： ryan

作为第一年参加CRC全国汽车拉力锦标赛的斯柯达明锐RS赛车，自第一站起便引起了不小的轰动，在之后的张掖站、四平站和薛城站中，明锐RS赛车更是连夺3站国家杯冠军，续写了斯柯达不朽的赛车传奇。

关键词：汽车拉力锦标赛斯柯达赛车 CRC RS 明锐

the acceleration of a high-charge electron bunch to 10 GeV in a 10-cm nanoparticle-assisted wakefield accelerator

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Matter and Radiation at Extremes 2024年第1期9卷 15-24页

作者： Constantin Aniculaesei thanh Ha Samuel Yoffe Lance Labun Stephen Milton Edward McCary Michael M.Spinks Hernan j.Quevedo Ou Z.Labun Ritwik Sain Andrea Hannasch Rafal Zgadzaj Isabella Pagano jose A.Franco-Altamirano Martin L.Ringuette Erhart Gaul Scott V.Luedtke Ganesh tiwari Bernhard Ersfeld Enrico Brunetti Hartmut Ruhl todd Ditmire Sandra Bruce Michael E.Donovan Michael C.Downer Dino A.jaroszynski Bjorn Manuel Hegelich University of texas at Austin AustinTexas 78712USA SUPA Department of Physics University of StrathclydeGlasgowScotland G4 ONGUnited Kingdom tau Systems Inc.AustinTexas 78701USA Lawrence Livermore National Laboratory LivermoreCalifornia 94550USA Los Alamos National Laboratory Los AlamosNew Mexico 87545USA Brookhaven National Laboratory UptonNew York 11973USA Ludwig-Maximilians-Universität MunichGermany

An intense laser pulse focused onto a plasma can excite nonlinear plasma *** appropriate conditions,electrons from the background plasma are trapped in the plasma wave and accelerated to ultra-relativistic *** scheme is called a laser wakefield *** this work,we present results from a laser wakefield acceleration experiment using a petawatt-class laser to excite the wakefields as well as nanoparticles to assist the injection of electrons into the accelerating phase of the *** find that a 10-cm-long,nanoparticle-assisted laser wakefield accelerator can generate 340 pC,10±1.86 GeV electron bunches with a 3.4 GeV rms convolved energy spread and a 0.9 mrad rms *** can also produce bunches with lower energies in the 4–6 GeV range.

关键词： acceleration nanoparticle charge

Ubiquitin homeostasis disruption, a common cause of proteostasis collapse in amyotrophic lateral sclerosis?

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Neural Regeneration Research 2022年第10期17卷 2218-2220页

作者： Christen G.Chisholm jeremy S.Lum Natalie E.Farrawell justin j.Yerbury Illawarra Health and Medical Research Institute/Molecular Horizons and School of Chemistry and Molecular Bioscience Science Medicine and Health FacultyUniversity of WollongongNorthfields AveWollongongNSWAustralia

Amyotrophic lateral sclerosis(ALS)is associated with proteostasis collapse:ALS is an unrelenting neurodegenerative disease that is characterized by the loss of motor neurons in the brain and spinal cord,resulting in the progressive atrophy,and eventual paralysis,of skeletal *** due to respiratory failure usually occurs within 2-5 years from symptom *** 90%of ALS cases are of unknown etiology and are termed sporadic ALS(sALS).the remaining 10%of ALS cases present with a family history(familial ALS;fALS)and are associated with genetic mutations in a range of over 20 functionally heterogeneous *** of disease origin,the pathological hallmark of ALS is the accumulation of ubiquitylated protein inclusions in motor neurons and surrounding glial *** presence of these inclusions,compromised largely of misfolded and aggregated proteins,implies a collapse in *** refers to the maintenance of the proteome in a state of balance or equilibrium so that a cell can perform its proper function.

关键词： stasis homeostasis collapse

农药亚致死剂量对小菜蛾及优姬蜂种群动力学的影响(英文)

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Insect Science 1995年第1期2卷 77-82页

作者：古德就 D.j.Wringt t.K.Waage ImperialCollegeatSilwoodpark CABInternationalInstituteofBiologicalControl 广州华南农业大学 UK

本研究通过用农药农蒙特(25×10)和氯氰菊酯(20×10)处理,采用生命表技术和控制效应来评判农药亚致死剂量对田间小菜蛾和优姬蜂种群动力学的影响。结果表明,农蒙特和氯氰菊酯对优姬蜂种群的控制效应大于对小菜蛾种群的控制效应,寄生在... 详细信息

本研究通过用农药农蒙特(25×10)和氯氰菊酯(20×10)处理,采用生命表技术和控制效应来评判农药亚致死剂量对田间小菜蛾和优姬蜂种群动力学的影响。结果表明,农蒙特和氯氰菊酯对优姬蜂种群的控制效应大于对小菜蛾种群的控制效应,寄生在农蒙特处理的小菜蛾幼虫体内的优姬蜂幼虫的死亡率显著地高于氯氰菊酯处理的和对照的,表现出农蒙特对寄生蜂影响的深远性。

关键词： insecticide sublethal dose Plutella xylostella Diadegma eucerophaga population dynam-ics control efficiency.

Unified power quality conditioner based on a three-level NPC inverter using fuzzy control techniques for all voltage disturbances compensation

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Frontiers in Energy 2014年第2期8卷 221-239页

作者： Salim CHENNAI M-t BENCHOUIA Electrical Engineering Department Birine Nuclear Research Center Ain-Oussera W. Djelfa 17200 Algeria L.G.E.B Laboratories Electrical Engineering Department Biskra University Biskra 07000 Algeria

this paper presents a novel and efficient control scheme for unified power quality conditioner （UPQC） based on three-level neutral point clamped （NPC） inverter using fuzzy logic techniques. the proposed UPQC is capable of mitigating source current harmonics and compensate all voltage disturbances such as voltage sags, swells, unbalances and harmonics. It is designed by the integration of series and shunt active filters （AFs） sharing a common DC bus capacitor. the DC voltage is maintained constant using proportional integral voltage controller. the synchronous reference frame （SRF） theory is used to get the reference signals for shunt active power filters （APFs） and the power reactive theory （p-q theory） for series APFs. the shunt and series APF reference signals derived from the control algorithm and sensed signals are injected in two controllers to generate switching signals. to improve the UPQC capability, fuzzy logic techniques are introduced to control the series APF. the performances of the proposed UPQC system are evaluated in terms of power factor correction, mitigation of voltage or current harmonics and all other voltage disturbances compensation using Matlab-Simulink software and SimPowerSystem toolbox. the simulation results illustrate the performance of the proposed UPQC at the common connection point of the nonlinear load to improve the power energy quality.

关键词： three-level neutral point clamped (NPC) inverter unified power quality conditioner (UPQC) current

ENERGY BALANCE IN 40-50 DAY PERIODIC OSCILLAtION OVER tHE ASIAN SUMMER MONSOON REGION DURING tHE 1979 SUMMER

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Advances in Atmospheric Sciences 1987年第1期4卷 66-73页

作者：何金海,t. Murakami,t. Nakazawa Nanjing Institute of Meteorology Nanjing Department of Meteorology University of Hawaii Honolulu U.S.A. Department of Meteorology University of Hawaii Honolulu U.S.A.

Based on calculations of data from FGGE Level III b, a discussion is made of the energy balance in the 40-50 day periodic oscillation over the Asian monsoon region during the 1979 summer. jt is found that the main source of 40-50 day periodic perturbation is the monsoon region extending from central South Asia to Southeast Asia. In the upper layer over the North Pacific subtropical area (10-20°N, 150°E-150°W) pressure work turns into kinetic energy that maintains 40-50 day periodic perturbation associated with the variation in position and intensity of the mid-Pacific trough. the mean energy budget in the three-dimensional space (0-30°N, 30°E-150°W, 100-1000 hPa) indicates that the 40-50 day periodic perturbation transports kinetic energy to a seasonal mean and a transient perturbation wind field.

关键词： PP ENERGY BALANCE IN 40-50 DAY PERIODIC OSCILLAtION OVER tHE ASIAN SUMMER MONSOON REGION DURING tHE 1979 SUMMER over