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Application of Modified Progressive Hedging for Stochastic Unit Commitment in Electricity-Gas Coupled Systems

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CSEE Journal of Power and Energy Systems 2021年第4期7卷 840-849页

作者： Haizhou Liu Xinwei Shen Qinglai Guo Hongbin sun Mohammad Shahidehpour wenzhi Zhao Xinyi Zhao Tsinghua-Berkeley Shenzhen Institute Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Department of Electrical Engineering Tsinghua UniversityBeijing 100084China Electrical and Computer Engineering Department Illinois Institute of Technology60616ChicagoILUnited States

The increasing number of gas-fired units has significantly intensified the coupling between electric and gas power ***,nonlinearity and nonconvexity in gas flow equations,together with renewable-induced stochasticity,resulted in a computationally expensive model for unit commitment in electricity-gas coupled integrated energy systems(IES).To accelerate stochastic day-ahead scheduling,we applied and modified Progressive Hedging(PH),a heuristic approach that can be computed in parallel to yield scenario-independent unit *** early termination and enumeration techniques,the modified PH algorithm saves considerable com,putational time for certain generation cost settings or when the scale of the IES is ***,an adapted second-order cone relaxation(SOCR)is utilized to tackle the nonconvex gas flow *** studies were performed on the IEEE *** system/Belgium 20-node gas system and the IEEE 118-bus system/Belgium 20-node gas *** computational efficiency when employing PH is 188 times that of commercial software,and the algorithm even outperforms Benders *** the same time,the gap between the PH algorithm and the benchmark is less than 0.01% in both IES systems,which proves that the solutions produced by PH reach acceptable optimality in this stochastic UC problem.

关键词： Electricity-gas coupled system integrated energy system modified Progressive Hedging second-order cone relaxation unit commitment

前路椎体次全切与椎间盘切除减压植骨融合内固定术治疗双节段颈椎病的临床疗效比较

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北京医学 2016年第7期38卷 631-637页

作者：甘立猛鲁世保孙文志海涌孟祥龙康南王宇首都医科大学附属北京朝阳医院骨科 100020 北京市大兴区人民医院首都医科大学宣武医院

目的比较椎体次全切除减压融合术（anterior cervical corpectomy and fusion,ACCF）与椎间盘切除减压植骨融合内固定术（anterior cervical discectomy and fusion,ACDF）对邻近双节段脊髓型颈椎病的治疗效果。方法回顾性分析2013年1月... 详细信息

目的比较椎体次全切除减压融合术（anterior cervical corpectomy and fusion,ACCF）与椎间盘切除减压植骨融合内固定术（anterior cervical discectomy and fusion,ACDF）对邻近双节段脊髓型颈椎病的治疗效果。方法回顾性分析2013年1月至2015年3月北京朝阳医院收治的63例因相邻双节段脊髓型颈椎病行前路手术治疗的患者临床及影像学资料,其中ACCF组31例,ACDF组32例。统计所有患者基线资料、手术时间、出血量、住院天数、手术相关并发症。比较两组术前及末次随访时颈椎曲度、T1椎体倾斜角（T1 Slope）、融合节段Cobb角、融合节段高度、植入物下沉、融合率、头尾端邻近节段骨化分级、日本骨科协会（Japanese Orthpaedic Association,JOA）评分及颈痛、上肢痛视觉模拟评分（visual analogue score,VAS）。结果随访时间为12～40个月。ACCF组出血量显著高于ACDF组（P〈0.05）;术前、末次随访时颈椎曲度、T1椎体倾斜角、融合节段Cobb角、融合节段高度比较差异均无统计学意义（P〉0.05）;末次随访时,2组均获得100%融合率,植入物下沉比较,差异无统计学意义（P〉0.05）。与术前相比,末次随访时ACCF组影像学参数差异无统计学意义（P〉0.05）,ACDF组颈椎曲度、融合节段Cobb角、融合节段高度显著增加（P〈0.05）。术前两组JOA评分、VAS评分差异均无统计学意义,末次随访时差异亦无统计学意义,末次随访时两组JOA评分、VAS评分均较术前明显改善（P〈0.05）。末次随访时,2组各影像学参数与JOA评分和VAS评分均无显著相关性（P〉0.05）。结论两种颈椎前路手术均可获得满意的临床效果,ACDF在出血量及改善颈椎曲度、融合节段Cobb角、融合节段高度等方面优于ACCF。两种颈椎前路术后影像学指标与临床评分均无显著相关性。

关键词：脊髓型颈椎病椎体次全切除减压融合术椎间盘切除减压融合术

青年心房颤动患者经二代冷冻球囊消融疗效及早期复发因素分析

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中华心律失常学杂志 2024年第4期28卷 316-321页

作者：蔡文芝孙鸣宇王祖禄梁明金志清北部战区总医院心血管内科、寒地心血管病全国重点实验室沈阳110016 聊城市人民医院老年医学科聊城252000

目的分析青年非瓣膜性心房颤动(房颤)患者导管消融疗效及复发因素。方法本研究为横断面研究。回顾性连续入选2019年1月至2020年12月入住北部战区总医院并接受二代冷冻球囊消融治疗的18~44岁诊断为房颤的青年患者(青年组),并在同期≥45... 详细信息

目的分析青年非瓣膜性心房颤动(房颤)患者导管消融疗效及复发因素。方法本研究为横断面研究。回顾性连续入选2019年1月至2020年12月入住北部战区总医院并接受二代冷冻球囊消融治疗的18~44岁诊断为房颤的青年患者(青年组),并在同期≥45岁房颤患者中按1∶2倾向评分匹配对照组,搜集患者临床资料,术后每3个月及第12个月对患者进行电话或门诊随访。结果共入选青年组患者48例,年龄(39.92±5.78)岁,对照组96例,年龄(59.27±7.54)岁,两组患者年龄、CHA_(2)DS_(2)-VAS_(C)评分差异具有统计学意义(P<0.001、P=0.023)。经1年随访共40例(27.78%,40/144)患者早期复发,其中青年组14例(29.17%,14/48),对照组26例(27.08%,26/96),Kaplan-Meier生存曲线分析显示两组间术后1年生存率差异无统计学意义(Log-Rank:P=0.865)。青年组患者空白期发作、空腹血糖升高是其二代冷冻球囊消融术后早期复发的危险因素,空腹血糖每增加1 mmol/L,房颤患者术后早期复发概率增加78.9%(HR=1.789,95%CI 1.081~2.962,P=0.024)。总人群及对照组患者,空白期发作、持续性房颤是其二代冷冻球囊消融术后早期复发的危险因素。结论青年房颤患者尽早开展导管消融等干预措施进行节律控制,并严格控制血糖,可降低房颤术后复发风险。

关键词：心房颤动青年二代冷冻球囊复发因素

A SPX domain vacuolar transporter links phosphate sensing to homeostasis in Arabidopsis

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Molecular Plant 2022年第10期15卷 1590-1601页

作者： Mingda Luan Fugeng Zhao Guangfang sun Min Xu Aigen Fu wenzhi Lan Sheng Luan Key Laboratory of Resource Biology and Biotechnology in Western China Ministry of EducationProvincial Key Laboratory of BiotechnologyCollege of Life SciencesNorthwest UniversityXi'an 710069China Institute of Future Agriculture Northwest Agriculture and Forestry UniversityYanglingShaanxi 712100China School of Life Sciences Nanjing UniversityNanjingJiangsu 210023China Department of Plant and Microbial Biology University of CaliforniaBerkeleyBerkeleyCA 94720USA

Excess phosphate(Pi)is stored into the vacuole through Pi transporters so that cytoplasmic Pi levels remain stable in plant *** hypothesized that the vacuolar Pi transporters may harbor a Pi-sensing mechanism so that they are activated to deliver Pi into the vacuole only when cytosolic Pi reaches a threshold high *** tested this hypothesis using Vacuolar Phosphate Transporter 1(VPT1),a SPX domain-containing vacuolar Pi transporter,as a *** studies have defined SPX as a Pi-sensing module that binds inositol polyphosphate signaling molecules(InsPs)produced at high cellular Pi *** showed here that Pi-deficient conditions or mutation of the SPX domain severely impaired the transport activity of *** further identified an auto-inhibitory domain in VPT1 that suppresses its transport *** together the results from detailed structure-function analyses,our study suggests that VPT1 is in the auto-inhibitory state when Pi status is low,whereas at high cellular Pi status InsPs are produced and bind SPX domain to switch on VPT1 activity to deliver Pi into the *** thus provides an auto-regulatory mechanism for VPT1-mediated Pi sensing and homeostasis in plant cells.

关键词： VPT1 Pi signaling autoinhibition transport activity inositol phosphates

Eu^(2+)激活的黄橙光荧光粉的制备及发光性能调控

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聊城大学学报:自然科学版 2023年第5期36卷 75-85页

作者：张新新王舒雅傅春青赵婷婷范丽艳孙文芝鲁东大学化学与材料科学学院山东烟台264025

采用高温固相法制备了一系列黄橙光荧光粉Sr_(9)Mg_(1.5)(PO_(4))_(7-x)(BO_(3))_(x):0.05Eu^(2+)(SMPB_(x)O:Eu^(2+),x=0~0.6)和Sr_(9-2 y)Ca_(y)Ba_(y)Mg_(1.5)(PO_(4))_(7):0.05Eu^(2+)(SC_(y)B_(y)MPO:Eu^(2+),y=0~1.0),并对其发光性能的调控进行了研究。所得荧光粉可以被蓝光和近紫外光有效激发,并发射黄橙光(450~800 nm)。随着(BO_(3))^(3-)与Ca^(2+)-Ba^(2+)共掺浓度的改变,可以调节Eu^(2+)发光中心在Sr31、Sr1和Sr32格位中的选择性占据,从而改变SMPB_(x)O:Eu^(2+)和SC y B y MPO:Eu^(2+)的发射光谱。因此,固定激发波长,改变(BO_(3))3-或Ca^(2+)-Ba^(2+)共掺浓度可以实现对SMPB_(x)O:Eu^(2+)(x=0.2~0.6)和SC_(y)B_(y)MPO:Eu^(2+)(y=0.25~1.0)发光颜色的调控。另外,SMPB_(x)O:Eu^(2+)和SC_(y)B_(y)MPO:Eu^(2+)的发光颜色也可以通过改变激发波长来进行调控。此外,(BO_(3))^(3-)掺杂与Ca^(2+)-Ba^(2+)共掺均可以明显提高荧光粉的热稳定性。在100℃下,SMPB_(x)O:Eu^(2+)(x=0.2~0.6)和SC_(y)B_(y)MPO:Eu^(2+)(y=0.25~1.0)样品的发光强度均可达到其各自初始强度的60%以上。

关键词：黄橙光荧光粉发光性能调控白光LED

PDCA循环在骨科住院医师规范化培训中的应用

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当代医学 2019年第13期25卷 185-187页

作者：王卫粮刘长松刘新民孙文志刘书茂刚君首都医科大学大兴教学医院骨科北京102600 首都医科大学大兴教学医院科教科北京102600

目的研究PDCA循环在骨科住院医师规范化培训中应用的效果。方法以PDCA循环为基础,选取2016年7月至2018年6月在骨科轮转的51名住院医师作为研究对象,27名作为研究组,24名作为对照组,对两组住院医师的学习培训效果进行比较与分析。结果 P... 详细信息

目的研究PDCA循环在骨科住院医师规范化培训中应用的效果。方法以PDCA循环为基础,选取2016年7月至2018年6月在骨科轮转的51名住院医师作为研究对象,27名作为研究组,24名作为对照组,对两组住院医师的学习培训效果进行比较与分析。结果 PDCA组专业理论成绩、临床技能成绩分别为(95.19±3.15)、(87.45±3.81)分,对照组分别为(89.21±3.16)、(80.45±3.81)分,研究组的专业理论和临床技能成绩均优于对照组,差异具有统计学意义(P<0.05)。结论 PDCA循环法在整个培训过程中的作用显著,提高培训效率,值得推广。

关键词： PDCA循环住院医师规范化培训骨科

Simulating the ion permeation and ion selection for a eukaryotic voltage-gated sodium channel NavPaS

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Protein & Cell 2018年第6期9卷 580-585页

作者： Juanrong Zhang wenzhi Mao Yanhui Ren Rui-Ning sun Nieng Yan Haipeng Gong MOE Key Laboratory of Bioinformatics School of Life Sciences Tsinghua University Beijing 100084 China Beijing Advanced Innovation Center for Structural Biology Tsinghua University Beijing 100084 China State Key Laboratory of Membrane Biology School of Life Sciences Tsinghua University Beijing 100084 China

Dear Editor, Voltage-gated sodium （Nav） channels are membrane pro- teins that are responsible for the propagation of action potentials in mammals by mediating Na~ influx in excitable cells such as nerve and muscle. In human, Nay channels are therapeutic targets as their mutations con- tribute to many diseases. Structures of prokaryotic Nay channels, e.g., NavAb （Payandeh et al., 2011）, NavRh （Zhang et al., 2012） and NavMs （Mccusker et al., 2012）, were successively determined in the past years. Recently, the cryo-EM structures of two eukaryotic Nay channels were reported （Shen et al., 2017; Yan et al., 2017）. Nay channels contain 24 transmembrane helices.

关键词： CRYSTAL-STRUCTURE

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商用车电控空气悬架提升桥牵引辅助策略研究

青岛大学学报（工程技术版） 2024年第1期39卷 73-80页

作者：张方明孙京哲魏文智严天一电子科技大学机械与电气工程学院四川成都611731 浙江科力车辆控制系统有限公司浙江江山3241001 青岛大学机电工程学院山东青岛266071

为验证商用车的牵引辅助功能通过比例控制策略的原理及实现方式,本文以三桥商用车电控空气悬架系统为主要研究对象,利用拉格朗日方程建立整车行驶动力学的理论模型,此基础上搭建Simulink仿真模型,提出面向基于比例控制的提升桥控制策略... 详细信息

为验证商用车的牵引辅助功能通过比例控制策略的原理及实现方式,本文以三桥商用车电控空气悬架系统为主要研究对象,利用拉格朗日方程建立整车行驶动力学的理论模型,此基础上搭建Simulink仿真模型,提出面向基于比例控制的提升桥控制策略。为分析实车应用可行性,分别在坡道工况和水平冰雪路面工况下,验证了该控制策略的牵引辅助效果,通过控制提升桥举升,有效转移驱动轴和提升桥载荷比,使车辆在符合承载要求前提下提高车辆驱动力,通过实验仿真验证该控制策略的有效性。

关键词：电控空气悬架系统牵引辅助控制策略提升桥控制策略坡道工况

A discussion on the upper limit of maturity for gas generation by marine kerogens and the utmost of gas generative potential:Taking the study on the Tarim Basin as an example

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Chinese Science Bulletin 2007年第A01期52卷 125-132页

作者： CHEN JianPing ZHAO wenzhi XIAO ZhongYao ZHANG ShuiChang DENG ChunPing sun YongGe WANG ZhaoMing Research Institute of Petroleum Exploration & Development PetroChina Beijing 100083 China Key Lab of Petroleum Geochemistry CNPC Beijing 100083 China Research Institute of Petroleum Exploration & Development Tarim Oilfield Company PetroChina Koda 841000 China State Key Lab of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China

The experimental data yielded by Rock-Eval pyrolysis, kerogen atomic H/C, Py-GC and gold-tube sealing thermal simulation on the marine Cambrian-Ordovician source rock from the Tarim Basin revealed that the upper limit of maturity for natural gas generation or the "deadline of gas generation" for marine types I and II kerogens is equal to 3.0% of vitrinite reflectance (Ro); while the "deadline of gas generation" for type III kerogens typically like coals is as high as 10% Ro. Thus, different organic matter has obviously different utmost maturities for gas generation. The mass-balance calculation by kerogen elements showed that when Ro>1.5%, the utmost amount of gas generation for the marine type II kerogen is less than 185 m3/t TOC, accounting for less than 30% of its total hydrocarbon generative potential; when Ro>2.0%, it becomes 110 m3/t TOC, less than 20% of the total hydrocarbon generative potential. The amount of the gas generative potential obtained by Rock-Eval is only around one tenth of the calculated value by the mass balance of kerogen elements at the same thermal evolutionary stage, while those by Py-GC and gold-tube sealing simulation are intervenient between the above two. The utmost of gas generative potential at the over 1.3% Ro stage is around 60―90 m3/t TOC, therefore, the amount of gas generation obtained by Rock-Eval is the minimum of gas generative potential, while that by the mass-balance calculation of kerogen elements is the maximum that the actual amount of gas generation should not exceed.

关键词：油母岩质海洋源岩石天然气