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A novel tuned heave plate system for heave motion suppression and energy harvesting on semi-submersible platforms

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Science China(Technological Sciences) 2016年第6期59卷 897-912页

作者： LIU Kun ou Jin Ping School of Civil Engineering Harbin Institute of Technology Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Institute of Ocean Deep Water Engineering Dalian University of Technology

Deepwater offshore structures such as semi-submersible platforms suffer powerful ocean waves due to their location and site condition. The long distance away from the shore also brings many difficulties to energy supply for the platform operation. How to reduce the response of the platform and convert the wave energy into electrical power is a meaningful topic. In this paper, a tuned heave plate system(THP) is presented and designed to be employed on a semi-submersible platform for heave motion suppression and energy harvesting. This THP system is composed of spring supports, a power take-off system(PTO), and a heave plate. The PTO system is a permanent magnet linear generator(PMLG), which could directly convert the kinetic energy of the heave plate into electronic power. The stiffness of the spring supports is designed based on the principle of the tuned mass damper(TMD). The numerical model of the platform and the THP system is established according to the hydrodynamic analysis results of the platform. The model is tested and modified by scale model tests on the platform in the wave tank. A parameter study, including the size, tuned period, and damping ratio of the THP system, is conducted systematically based on the numerical model. The optimal parameters of the THP are selected due to the maximum heave motion reduction under severe wave conditions in South China Sea. The performance of the semi-submersible with and without the THP system under different wave conditions is analyzed. It is demonstrated that this novel tuned heave plate system could reduce the heave motion of the semi-submersible platform significantly and generate considerable power, which makes the THP system have a broad prospect for development.

关键词： heave motion semi-submersible wave energy harvesting wave energy converter TMD

Gefitinib improves severe bronchorrhea and prolongs the survival of a patient with lung invasive mucinous adenocarcinoma:A case report

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World Journal of Clinical Cases 2023年第2期11卷 441-448页

作者： Guo-Chun ou Wen Luo Wei-Shan Zhang Shu-Hong Wang Jie Zhao Hong-Mei Zhao rong Qiu Department of Respiratory and Critical Care Medicine Suining Central HospitalSuining 629000Sichuan ProvinceChina Department of Pathology Suining Central HospitalSuining 629000Sichuan ProvinceChina

BACKGRouND Lung invasive mucinous adenocarcinoma(LIMA),formerly referred to as mucinous bronchioloalveolar carcinoma,is a rare disease that usually presents as bilateral lung infiltration,is unsuitable for surgery and radiotherapy,and shows poor response to conventional *** SUMMARY We report a 56-year-old Chinese man with a history of smoking and epidermal growth factor receptor mutation-positivity who was initially misdiagnosed as severe pneumonia,but was ultimately diagnosed as a case of invasive mucinous adenocarcinoma of the lung by computed tomography-guided percutaneous lung *** and dyspnea were improved within 24 h after initiation of gefitinib therapy and the radiographic signs of bilateral lung consolidation showed visible improvement within 30 *** more than 11 months of treatment,there is no evidence of recurrence or severe adverse *** Although the precise mechanism of the antitumor effects of gefitinib are not clear,our experience indicates an important role of the drug in LIMA and provides a reference for the diagnosis and treatment of this disease.

关键词： Gefitinib Epidermal growth factor receptor Lung cancer Bronchorrhea Lung invasive mucinous adenocarcinoma Case report

Discrepancies in Simulated Ocean Net Surface Heat Fluxes over the North Atlantic

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Advances in Atmospheric Sciences 2022年第11期39卷 1941-1955页

作者： Chunlei LIU Yazhu YANG Xiaoqing LIAO Ning CAO Jimmy LIU Niansen ou Richard P.ALLAN Liang JIN Ni CHEN rong ZHENG South China Sea Institute of Marine Meteorology Guangdong Ocean UniversityZhanjiang 524088China CMA-GDou Joint Laboratory for Marine Meteorology Guangdong Ocean UniversityZhanjiang 524088China College of Ocean and Meteorology Guangdong Ocean UniversityZhanjiang 524088China Department of Mathematics Trinity CollegeUniversity of CambridgeCambridge CB21TQUK Department of Meteorology University of ReadingReading RG66BBUK National Centre for Earth Observation Reading RG66BBUK

The change in ocean net surface heat flux plays an important role in the climate *** is closely related to the ocean heat content change and ocean heat transport,particularly over the North Atlantic,where the ocean loses heat to the atmosphere,affecting the AMOC(Atlantic Meridional Overturning Circulation)variability and hence the global ***,the difference between simulated surface heat fluxes is still large due to poorly represented dynamical processes involving multiscale interactions in model *** order to explain the discrepancy of the surface heat flux over the North Atlantic,datasets from nineteen AMIP6 and eight highresSST-present climate model simulations are analyzed and compared with the DEEPC(Diagnosing Earth's Energy Pathways in the Climate system)*** an indirect check of the ocean surface heat flux,the oceanic heat transport inferred from the combination of the ocean surface heat flux,sea ice,and ocean heat content tendency is compared with the RAPID(Rapid Climate Change-Meridional Overturning Circulation and Heat flux array)observations at 26°N in the *** AMIP6 simulations show lower inferred heat transport due to less heat loss to the *** heat loss from the AMIP6 ensemble mean north of 26°N in the Atlantic is about10 W m–2 less than DEEPC,and the heat transport is about 0.30 PW(1 PW=1015 W)lower than RAPID and *** model horizontal resolution effect on the discrepancy is also *** show that by increasing the resolution,both surface heat flux north of 26°N and heat transport at 26°N in the Atlantic can be improved.

关键词： ocean net surface heat flux ocean heat transport discrepancy simulations observations

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组织工程骨修复牙槽嵴裂的实验研究

中华整形外科杂志 2007年第1期23卷 29-31页

作者：欧新荣翦新春林戈中南大学湘雅医院口腔医学院口腔颌面外科长沙410078 国家人类干细胞工程技术研究中心

目的探讨骨髓来源的种子细胞复合胶原蛋白海绵构建组织工程骨修复牙槽嵴裂的可行性。方法12条实验犬被分成4组。于双侧上颌第3切牙处去除长15mm牙槽骨形成牙槽嵴裂动物模型；经股骨骨髓穿刺，分离骨髓基质干细胞，培养、传代扩增诱导后... 详细信息

目的探讨骨髓来源的种子细胞复合胶原蛋白海绵构建组织工程骨修复牙槽嵴裂的可行性。方法12条实验犬被分成4组。于双侧上颌第3切牙处去除长15mm牙槽骨形成牙槽嵴裂动物模型；经股骨骨髓穿刺，分离骨髓基质干细胞，培养、传代扩增诱导后，与蛋白胶原海绵混合培养48h，植入骨缺损处。饲养12周后处死动物，通过三维CT及组织学检查评价骨缺损修复的效果。结果实验组牙槽骨断端间形成完整的骨连接，切片可见髓腔通畅，新形成的牙槽嵴宽度与松质骨组相似（P〉0．05），但高度不足（P〈0．05）。结论组织工程骨可以较好地修复牙槽嵴裂，有望成为修复牙槽嵴裂的治疗方法。

关键词：组织工程骨牙槽嵴裂修复

Numerical Investigation of the Load Distribution between the Main Blade and the Splitter Blade in a High-Loading Centrifugal Compressor

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Journal of Thermal Science 2022年第5期31卷 1682-1695页

作者： ou Jun JIN Donghai GUI xingmin Aeroengine Simulation Research Center School of Energy and Power EngineeringBeihang UniversityBeijing100191China Jiangxi Research Institute of Beihang University Nanchang330096China

In the traditional design of the centrifugal compressor,the splitter blade and the main blade always keep the same ***,to enable high efficiency of the high-loading centrifugal compressor,the matching of design parameters of the splitter blade and the main blade needs to be *** this paper,the influence of the load distribution between the main blade and the splitter blade on the aerodynamic performance,the flow field,and the internal vortices of a high-loading centrifugal compressor were studied by means of CFD *** cases with different values of the variable CR which is defined as the load-ratio of splitter blade to main blade were set *** each case,the splitter blade and the main blade were shaped according to different laws of circulation distribution(_(r)V_(u))while the average circulation of the splitter blade and the main blade at any meridional position were consistent with that of the *** results showed that a proper reduction of the load-ratio of splitter blade to main blade is beneficial to suppress the leakage vortex of the splitter blade and reduce the scale of the wake in the channel near the suction-side of the splitter blade,which consequently improves the flow uniformity at the impeller outlet and enhances the aerodynamic performance of both the stage and the *** stage isentropic efficiency of the optimal case was found to be 0.7%higher than that of the prototype and the stage total pressure ratio was also *** optimal value of CR,which in this investigation is 94%,is supposed to be the result of the trade-off between the development of the wake and the leakage vortices in adjacent two *** optimization of the load distribution between the main blade and the splitter blade provides an opportunity to further improve the high-loading centrifugal compressor performance.

关键词： high-loading centrifugal compressor load distribution performance flow uniformity wake leakage vortex

Nonlinear Bifurcation and Post-buckling Analysis of Cylindrical Composite Stiffened Laminates Based on Weak Form Quadrature Element Method

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Acta Mechanica Solida Sinica 2023年第6期36卷 817-836页

作者： Xiang ou Xiaohu Yao Run Zhang School of Civil Engineering and Transportation South China University of TechnologyGuangzhouGuangdongChina

This paper presents a weak form quadrature element formulation in the analysis of nonlinear bifurcation and post-buckling of cylindrical composite stiffened laminates subjected to transverse loads.A total Lagrangian updating scheme is used in combination with arc-length method,and the branch-switching method is adopted to identify the whole post-buckling procedure of the *** formulation of the shell model and beam model are based on the basic concept of *** coincidence of discrete nodes and integration points in quadrature element endows it with compactness and conciseness in the nonlinear buckling analysis of the cylindrical stiffened *** numerical examples are firstly presented to verify the effectiveness and accuracy of present *** studies on the effects of the height-to-breadth ratio,lamination schemes,positions,distribution,number of the stiffeners on the bifurcation and post-buckling behavior are performed.

关键词： Cylindrical composite stiffened laminates Weak form quadrature element formulation Nonlinear bifurcation bucking Post-buckling analysis

Optical propagation through non-Kolmogorov turbulence

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Science China(Information Sciences) 2013年第4期56卷 69-74页

作者： TANG Hua ou BaoLin School of Electronic and Information Engineering Beihang University

In this paper,the effects of the generalized exponent,the height and the zenith angle on the log-amplitude variance in the weak fluctuation are *** theoretical results indicate that for the downlink,the log-amplitude variance of the Kolmogorov model is always smaller than that of the three-layer model,while for the uplink,there is a point of intersection in the log-amplitude variance curves of the two *** different phenomena for the downlink and uplink are analyzed in ***,we find a method to ascertain precise values of the boundary layer altitudes for the three-layer model under various atmospheric conditions through the analysis for the point of *** at the point of intersection,the Kolmogorov model can be used to replace the three-layer model to simplify the analysis of the system ***,the log-amplitude variance increases with the increase of the zenith angle.

关键词： atmospheric turbulence three-layer model log-amplitude variance power spectral density generalized exponent

Hydrothermal Preparation of Homogeneous Cobalt Oxide Nanomaterials as Stable Anodes for Superior Lithium Ion Batteries

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Acta Metallurgica Sinica(English Letters) 2021年第3期34卷 383-389页

作者： Junke ou Shugen Wu Hao Wang Institute for Advanced Study Chengdu UniversityChengdu 610106China Zhanglan Honors College Chengdu UniversityChengdu 610106China School of Mechanical Engineering Chengdu UniversityChengdu 610106China

In this study,uniform Co_(3)O_(4) nanoparticles are prepared via a simple and facile hydrothermal synthesis without calcination *** the Co_(3)O_(4)nanomaterials are investigated as anodes for lithium ion batteries,a good electrochemical property is ***,the reversible capacity of the as-synthesized Co_(3)O_(4) nanoparticle has a significant growth from383 mAh g^(-1)of the initial cycle to 471 mAh g^(-1)of the 300 th cycle at 2 A g^(-1).Moreover,when it recovers to 50 mA g^(-1)after different current densities,a superior reversible capacity of 695 mAh g^(-1)can be *** favorable electrochemical properties will make the as-obtained Co_(3)O_(4) have a good application prospect as anode material for lithium ion batteries.

关键词： Co3O4 Hydrothermal synthesis Anode Lithium ion batteries

Pre-conceptional and prenatal exposure to secondhand smoke and autism spectrum disorder:a national multi-center study in China

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World Journal of Pediatrics 2023年第8期19卷 761-769页

作者： Li-Zi Lin Xiao-Xuan ou Xiao-Ling Zhan xin Wang Li Cai Xiu-Hong Li Jin Jing Guang-Hui Dong Guangdong Provincial Engineering Technology Research Center of Environmental Pollution and Health Risk Assessment Department of Occupational and Environmental HealthSchool of Public HealthSun Yat-Sen University74 Zhongshan 2nd RoadYuexiu DistrictGuangzhou510080China Department of Maternal and Child Health School of Public HealthSun Yat-Sen University74 Zhongshan 2Nd RoadYuexiu DistrictGuangzhou510080China

Background Despite extensive research evaluating the association between prenatal exposure to secondhand smoke(SHS)and the development of autism spectrum disorders(ASD),no study has investigated the association by considering the pre-conceptional *** study aimed to investigate the associations of pre-conceptional and prenatal SHS exposure and the development of ASD among *** In this cross-sectional study,parents of 6049 toddlers aged 16–30 months were recruited from 7 tertiary hospitals,21 communities,and 7 kindergartens located in seven cities in six provinces from five geographical regions of *** analyzed the associations of SHS exposure and the odds of ASD among toddlers in different exposure windows(pre-conceptional and/or prenatal periods).Data were analyzed from November 2021 to January *** Among the 6049 toddlers included in the analysis[22.7(4.1)months;44.8%girls],71 were identified and diagnosed with *** with the unexposed toddlers,toddlers with pre-conceptional SHS exposure had higher odds of ASD(OR 2.30,95%CI 1.36–3.84),while we observed a non-significantly positive association regarding prenatal SHS *** considering both pre-conceptional and prenatal periods,toddlers who were continuously exposed to SHS during these two periods had higher odds than those without SHS exposure(OR 2.32,95%CI 1.24–4.14).Conclusion We reported positive SHS–ASD associations when exposed during the pre-conceptional period and continuously exposed during pre-conceptional and prenatal periods,emphasizing the critical window of pre-conception for targeted intervention on smoking.

关键词： Autism spectrum disorder China Epidemiology Pre-conception Secondhand smoke