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The calculation of the circulation in South China Sea by a diagnostic model

Acta Oceanologica Sinica 2008年第Z1期27卷 31-45页

作者： zhou weidong yang yang dong danpeng South China Sea Institute of Oceanology Chinese Academy of Science Guangzhou 510301 China South China Sea Institute of Oceanology Chinese Academy of Science Guangzhou 510301 China South China Sea Institute of Oceanology Chinese Academy of Science Guangzhou 510301 China

A high resolved two-dimensional linear global diagnostic model combining with the dynamical calculation is used to calculate velocity field in the South China Sea(SCS). The study of model results shows that eddy diffusion does not change basic structure of circulation in the SCS and does not change the direction of invasive water, but changes the value of transport considerably especially in straits. The velocity field is not changed whether the wind stress is considered or not. This result shows the circulation is largely determined by a density field which well records most of the important contribution of the wind stress effect. Potential vorticity is calculated to testify the dynamics of the model results. The result shows that a good conservation of the nonlinear PV. This indicates most effects of the important nonlinear processes are well recorded in density and the nonlinear term is negligible so that the simplified model is reliable. The model results show the water exchanges between the SCS and open ocean or surrounding seas. Cold deep water invades through Luzon Strait and Warm shallow water is pushed out mainly through Karimata Straits. The model results also reveal the structure of the circulation in the SCS basin. In two circulations of upper and middle layers, a cyclonic one in the north and an anti-cyclonic one in the south, reflect the climatologic average of the circulation driven by monsoon. In the deep or bottom layer, these two circulations reflect the topography of the basin. Above the middle layer, invasive water enters westward in the north but the way of invasion of Kuroshio is not clear. Below the deep layer, a current goes down south near the east basin ,and invasive water enters in the basin from the west Pacific.

关键词： diagnostic model South China Sea potential vorticity circulation

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Experimental study on transfer functions of an active rotor under different flight conditions

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Chinese Journal of Aeronautics 2022年第8期35卷 107-120页

作者： Jinlong zhou Linghua dong weidong yang National Key Laboratory of Rotorcraft Aeromechanics Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Vibrations impose negative impacts on the effectiveness and public acceptance of *** rotors with trailing-edge flaps have been proved to be an effective way to actively eliminate helicopter *** the existing control algorithm based on offline system identification,the transfer functions of an active rotor under different flight conditions are pre-requisites to implement closed-loop vibration *** this study,a three-bladed active rotor with improved trailing-edge flaps is designed,and wind-tunnel tests are conducted to identify the transfer functions of this active rotor using frequency sweep and phase sweep *** experimental results demonstrate that these transfer functions are insensitive to the variation of flight speeds:the amplitude of the transfer function varies slightly,while the phase delay almost remains *** addition,this finding is validated through closed-loop vibration control tests with the active *** transfer function obtained from the hover test results is also applicable to closed-loop vibration control tests under the forward flight *** will dramatically simplify the implementation and operation of an active rotor.

关键词： Active rotor Helicopter Trailing-edge flap Transfer function Vibration control Wind tunnel test

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Ocean Model Open Boundary Conditions with Volume, Heat and Salinity Conservation Constraints

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Advances in Atmospheric Sciences 2014年第1期31卷 188-196页

作者： WANG Qiang zhou weidong WANG dongxiao dong danpeng State Key Laboratory of Tropical Oceanography South China Sea Institute of Oceanology Chinese Academy of Sciences University of Chinese Academy of Sciences

Open boundary conditions （OBCs） for a regional ocean model that can be integrated stably over a long timeframe, as well as satisfy the volume, heat and salinity conservation constraints, were developed. First, the idea that the inward and outward flux information can be treated separately in the OBCs was adopted. Second, in order to maintain the property that the volume, heat and salinity remains conserved in the simulation domain, conservation constraints were added to the OBCs, and an inverse method utilized to solve the constraint equations. Ideal experiments were designed to investigate the conservation property, and the OBCs were found to work efficiently to maintain the volume, heat and salinity conservation. It was found that simulations were comparable to observations when the OBCs were applied to a regional ocean model.

关键词： open boundary conditions modeling inverse method ocean circulation

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Management and outcome of pelvic fractures in elderly patients： a retrospective study of 40 cases

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Chinese Medical Journal 2014年第15期127卷 2802-2807页

作者： dong Jinlei Hao Wei Wang Bomin Wang Lubo Li Lianxin Mu weidong yang Yongliang Xin Maoyuan Wang Fu zhou dongsheng Department of Orthopedics Shandong Provincial Hospital Affiliatedto Shandong University Jinan Shandong 250021 China Department of Orthopaedics and Traumatology Yantai YuhuangdingHospital Affiliated to Qingdao University Medical College YantaiShangdong 264000 China

Background Pelvic fractures are uncommon in elderly patients and so are infrequently addressed in the *** purpose of this study was to investigate the management and outcome of pelvic fractures in elderly *** We retrospectively reviewed the records of pelvic fractures in elderly patients （age ≥55 years） who were treated in our department from September 1997 to May *** A total of 40 elderly patients with pelvic fractures were *** mean age was 65.8 years （range 55-87 years）.About 68% （n=27） were *** average Injury Severity Score （ISS） was 17.8 （range 6-45）.Twelve （30%）patients required blood transfusion （mean 10 units） during the first 24 *** fractures were most frequently due to falling from a standing position （48%）.Almost half （48%） were grade I *** injuries were present in 70%（n=28） of patients,and 65% （n=26） had medical ***,29 patients （73%） underwent non-surgical management of their pelvic *** average hospital stay was 25 *** were five in-hospital deaths and one death 10 months after *** ISSs （〉25） were associated with increased in-hospital mortality （P=0.018）.At the final assessment （mean follow-up 15 months）,52% of the surviving patients had experienced decreased *** Pelvic fractures in elderly patients result in high morbidity and mortality rates.A high ISS （〉25） can be used to identify a patient at high *** recommend aggressive resuscitation and intensive care for that *** patients with an unstable pelvic or displaced acetabular fracture （≥2 mm） who can endure surgery,open reduction and internal fixation can provide adequate fixation for early weight-bearing and restoration of the bone stock.

关键词： pelvic fractures elderly patients management outcome

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直升机后缘襟翼驱动器迟滞现象仿真与抑制

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航空学报 2020年第4期41卷 139-149页

作者：周金龙董凌华杨卫东南京航空航天大学航空学院直升机旋翼动力学国家级重点实验室南京210016

直升机后缘襟翼多采用压电驱动器作为驱动元件,但是在使用过程中压电驱动器迟滞会对其振动控制性能产生不利影响,因此针对压电驱动器迟滞开展了迟滞建模与抑制研究。通过实验研究了压电驱动器在不同驱动频率下的迟滞特性,采用Bouc-Wen... 详细信息

直升机后缘襟翼多采用压电驱动器作为驱动元件,但是在使用过程中压电驱动器迟滞会对其振动控制性能产生不利影响,因此针对压电驱动器迟滞开展了迟滞建模与抑制研究。通过实验研究了压电驱动器在不同驱动频率下的迟滞特性,采用Bouc-Wen模型对驱动器迟滞现象进行了建模,并采用粒子群算法(PSO)辨识模型参数,与实际测量迟滞曲线进行了对比,在10~60Hz范围内所建立的迟滞模型能够较为精确地描述压电驱动器迟滞现象。建立了基于BoucWen逆模型的前馈补偿控制与PID反馈控制相结合的复合控制策略,实验结果显示该控制策略能够在10~60Hz较宽的频率范围内有效抑制该压电驱动器迟滞现象。建立了考虑驱动器迟滞的主动控制后缘襟翼振动控制动力学模型,并对中等速度稳态前飞条件下后缘襟翼振动控制性能进行了仿真,仿真结果显示驱动器迟滞会在一定程度上削弱振动控制性能,而采用复合控制可以提高后缘襟翼旋翼振动控制性能。

关键词：直升机旋翼后缘襟翼压电驱动器迟滞

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智能旋翼连续时间高阶谐波控制稳定性分析

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振动．测试与诊断 2019年第5期39卷 1075-1080,1137页

作者：周金龙董凌华杨卫东南京航空航天大学直升机旋翼动力学国家级重点实验室

后缘襟翼智能旋翼是一种行之有效的直升机旋翼振动主动控制技术,高阶谐波控制算法广泛应用于智能旋翼振动控制领域,其控制器参数直接影响振动控制性能和稳定性。基于后缘襟翼智能旋翼悬停实验数据,笔者经拟合得到智能旋翼系统的传递函数... 详细信息

后缘襟翼智能旋翼是一种行之有效的直升机旋翼振动主动控制技术,高阶谐波控制算法广泛应用于智能旋翼振动控制领域,其控制器参数直接影响振动控制性能和稳定性。基于后缘襟翼智能旋翼悬停实验数据,笔者经拟合得到智能旋翼系统的传递函数,建立智能旋翼参数化仿真模型,并进行了垂向载荷振动控制仿真。通过系统开环传递函数Nichols图的方式对振动控制系统的稳定性和稳定裕度进行了分析,在保证振动控制性能的前提下,获得了控制器时间常数和相角特性对控制系统稳定裕度的影响规律,为后续智能旋翼振动控制实验中控制器参数调整提供参考。

关键词：直升机旋翼振动控制连续时间高阶谐波控制稳定性

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大洋环流的诊断计算

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海洋通报 2007年第6期26卷 3-8页

作者：杨阳周伟东董丹鹏中国科学院南海海洋研究所热带海洋环境动力学重点实验室

采用二维的全球高分辨率(1/4°×1/4°)的自由表面诊断模型结合动力计算估算全球大洋环流,模拟结果与其他模拟结果非常相似。流函数的分布表明,全球大洋中的主要流系均得到体现,包括大洋环流的西向强化的现象(黑潮、湾流等)。黑潮主轴... 详细信息

采用二维的全球高分辨率(1/4°×1/4°)的自由表面诊断模型结合动力计算估算全球大洋环流,模拟结果与其他模拟结果非常相似。流函数的分布表明,全球大洋中的主要流系均得到体现,包括大洋环流的西向强化的现象(黑潮、湾流等)。黑潮主轴的流量约54Sv(1Sv=106m3/s),非常接近实测值;各层水平流场分布情况显示,各大洋的一些基本流系都能得到很好的再现。如黑潮和南极绕极流可深达底层。湾流不能到达深层,大约在1000～2000m之间海流即已转向。

关键词：诊断模型流函数动力计算大洋环流

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基于加权最小二乘法辨识的后缘襟翼智能旋翼振动载荷闭环控制仿真研究

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振动与冲击 2019年第4期38卷 237-244页

作者：周金龙董凌华杨卫东刘士明南京航空航天大学航空宇航学院南京210016 南京模拟技术研究所南京210016

智能旋翼是一种行之有效的直升机旋翼振动主动控制技术,针对后缘襟翼式智能旋翼振动闭环控制问题,建立了带后缘襟翼旋翼气弹耦合动力学模型,并对后缘襟翼进行了开环控制仿真。通过对后缘襟翼扫幅、扫频和扫相分析,研究了后缘襟翼偏转运... 详细信息

智能旋翼是一种行之有效的直升机旋翼振动主动控制技术,针对后缘襟翼式智能旋翼振动闭环控制问题,建立了带后缘襟翼旋翼气弹耦合动力学模型,并对后缘襟翼进行了开环控制仿真。通过对后缘襟翼扫幅、扫频和扫相分析,研究了后缘襟翼偏转运动的幅值、频率与相位对旋翼振动载荷的影响,采用高阶谐波控制算法,结合加权最小二乘法辨识系统传递矩阵,并考虑驱动器饱和现象,进行了后缘襟翼智能旋翼闭环控制仿真。仿真结果表明旋翼通过频率垂向振动载荷降幅最高达到87%,取得了良好的控制效果,为后缘襟翼智能旋翼闭环控制系统工程实现提供参考。

关键词：旋翼直升机振动控制控制仿真智能旋翼加权最小二乘法(WLSE)

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Central nervous system efficacy of aumolertinib versus gefitinib in patients with untreated,EGFR-mutated,advanced non-small cell lung cancer:data froma randomized phase III trial(AENEAS)

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Cancer Communications 2024年第9期44卷 1005-1017页

作者： Shun Lu Xiaorong dong Hong Jian Jianhua Chen Gongyan Chen Yuping Sun Yinghua Ji ZipingWang Jianhua Shi Junguo Lu Shaoshui Chen dongqing Lv Guojun Zhang Chunling Liu Juan Li Xinmin Yu Zhong Lin Zhuang Yu ZhehaiWang Jiuwei Cui Xingxiang Xu Jian Fang Jifeng Feng Zhi Xu RuiMa Jie Hu Nong yang Xiangdong zhou XiaohongWu Chengping Hu Zhihong Zhang You Lu Yanping Hu Liyan Jiang Qiming wang Renhua Guo Jianying zhou Baolan Li Chunhong Hu Wancheng Tong Helong Zhang LinMa Yuan Chen Zhijun Jie Yu Yao Longzhen Zhang JieWeng weidong Li Jianping Xiong Xianwei Ye Jianchun Duan Haihua yang Meili Sun HongyingWei JiaweiWei Zheyu Zhang QiongWu Department of Medical Oncology Shanghai Chest Hospital Shanghai JiaoTong UniversityShanghaiP.R.China Cancer Center Union Hospital Tongji Medical College Huazhong University of Science and TechnologyWuhanHubeiP.R.China Department of Medical Oncology-Chest Hunan Cancer Hospital&The Affiliated Cancer Hospital of Central South University Xiangya School of MedicineChangshaHunanP.R.China Thoracic OncologyMedicine HarbinMedical University Cancer HospitalHarbinHeilongjiangP.R.China Department of Oncology Jinan Central HospitalJinanShandongP.R.China Department of Oncology First Affiliated Hospital of Xinxiang Medical UniversityXinxiangHenanP.R.China Department of Chest Medicine Beijing Cancer HospitalBeijingP.R.China Department of Internal Medicine Linyi Cancer HospitalLinyiShandongP.R.China Department of Respiratory Medicine Nantong Tumor HospitalNantongJiangsuP.R.China Department of Oncology Binzhou Medical University HospitalBinzhouShandongP.R.China Breath Internal Medicine Taizhou Hospital of Zhejiang ProvinceLinhaiZhejiangP.R.China Department of Respiration The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenanP.R.China Department of Lung Internal Medicine Affiliated Tumor Hospital of Xinjiang Medical UniversityUrumqiXinjiangP.R.China Department of Thoracic Oncology Sichuan Cancer HospitalChengduSichuanP.R.China Thoracic Medical Oncology Cancer Hospital of the University of Chinese Academy of Sciences(Zhejiang Cancer Hospital)HangzhouZhejiangP.R.China Department of Thoracic Oncology The Fifth Subsidiary Sun Yat-sen University HospitalZhuhaiGuangdongP.R.China Department of Oncology The Affiliated Hospital of QingdaoUniversityQingdaoShandongP.R.China Department of Oncology Shandong Cancer HospitalJinanShandongP.R.China Department of Oncology The First BethuneHospital of Jilin UniversityChangchunJilinP.R.China Department of Respiration Northern Jiangsu People’s Hospital Affiliated to Yangzhou UniversityYangzhouJiangsuP.R.China Department of Internal

Background:The initial randomized,double-blinded,actively controlled,phase III ANEAS study(NCT03849768)demonstrated that aumolertinib showed superior efficacy relative to gefitinib as first-line therapy in epidermal growth factor receptor(EGFR)-mutated advanced non-small cell lung cancer(NSCLC).Metastatic disease in the central nervous system(CNS)remains a challenge in the management of *** study aimed to compare the efficacy of aumolertinib versus gefitinib among patients with baseline CNS metastases in the ANEAS ***:Eligible patients were enrolled and randomly assigned in a 1:1 ratio to orally receive either aumolertinib or gefitinib in a double-blinded *** with asymptomatic,stable CNS metastases were ***-up imaging of the same modality as the initial CNS imaging was performed every 6 weeks for 15 months,then every *** responsewas assessed by a neuroradiological blinded,independent central review(neuroradiological-BICR).The primary endpoint for this subgroup analysis was CNS progression-free survival(PFS).Results:Of the 429 patients enrolled and randomized in the ANEAS study,106 patients were found to have CNS metastases(CNS Full Analysis Set,cFAS)at baseline by neuroradiological-BICR,and 60 of them had CNS target lesions(CNS Evaluable for Response,cEFR).Treatment with aumolertinib significantly prolonged median CNS PFS compared with gefitinib in both cFAS(29.0 vs.8.3 months;hazard ratio[HR]=0.31;95%confidence interval[CI],0.17-0.56;P<0.001)and cEFR(29.0 vs.8.3 months;HR=0.26;95%CI,0.11-0.57;P<0.001).The confirmed CNS overall response rate in cEFRwas 85.7%and 75.0%in patients treated with aumolertinib and gefitinib,*** risk analysis showed that the estimated probability of CNS progression without prior non-CNS progression or death was consistently lower with aumolertinib than with gefitinib in patients with and without CNSmetastases at *** new safety findings were ***:The

关键词： aumolertinib brain metastasis non-small cell lung cancer third-generation EGFR-TKI

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直升机桨叶连续后缘襟翼设计与气动影响分析

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航空工程进展 2018年第2期9卷 230-238页

作者：李贇董凌华周金龙杨卫东南京航空航天大学直升机旋翼动力学国家重点实验室南京210016

在直升机旋翼减振应用中,连续后缘襟翼和常规分离式襟翼相比具有重量轻、结构紧凑、气流平稳等优点。选用压电纤维复合材料作为驱动材料,基于NACA23012翼型设计带有连续变形后缘襟翼的桨叶段,对襟翼及其驱动结构进行选材设计分析;采用... 详细信息

在直升机旋翼减振应用中,连续后缘襟翼和常规分离式襟翼相比具有重量轻、结构紧凑、气流平稳等优点。选用压电纤维复合材料作为驱动材料,基于NACA23012翼型设计带有连续变形后缘襟翼的桨叶段,对襟翼及其驱动结构进行选材设计分析;采用流固耦合方法分析连续后缘襟翼对剖面翼型气动特性的影响。结果表明:连续后缘襟翼在直升机桨叶工作迎角、马赫数范围内可实现有效偏转,显著改变翼剖面气动升力和力矩,证明了连续后缘襟翼在旋翼减振控制中的潜在应用价值。

关键词：旋翼直升机连续后缘襟翼流固耦合压电纤维复合材料

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