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The Defocusing Energy-supercritical NLS in Higher Dimensions

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Acta Mathematica Sinica,English Series 2017年第7期33卷 911-925页

作者： teng fei ZHAO The Graduate School of China Academy of Engineering Physics P.O.Box 2101Belting 100088P.R.China

Abstract We consider the defocusing nonlinear SchrSdinger equations iut ＋△u = lulPu with p being an even integer in dimensions d ≥ 5. We prove that an a priori bound of critical norm implies global well-posedness a... 详细信息

关键词： Nonlinear Schr?dinger equation priori bound scattering

Towards a new climate economics:research areas and prospects

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Chinese Journal of Population,Resources and Environment 2015年第1期13卷 1-9页

作者： Jiankun He fei teng Ye qi Research Center for Contemporary Management Tsinghua University Institute of Energy Environment and Economy Tsinghua University School of Public Policy and Management Tsinghua University

International cooperation to address climate change now stands at a *** a new international regime for emissions reduction established by the Durban Platform, "New Climate Economics(NCE)" has become a research *** need for urgent action to combat climate change has prompted discussion on reforms of economic growth patterns and the energy *** industrial civilization,therefore,now faces a transition towards a new pathway for ecological *** explores new economic concepts,theories,and analytical methods to design a balanced pathway for sustainable growth and emission *** of getting trapped in discussions on allocation of emission reduction responsibilities and obligations among countries,NCE pays more attention to developing win-win multilateral cooperation mechanisms that facilitate collaborative R&D and knowledge *** addition,NCE studies incentives for low-carbon transition,turning carbon emission reduction into a domestic need for countries to increase their international *** achieve the 2°C target,most countries around the world face challenges of insufficient emission allowances to cover expected emissions associated with their projected economic *** carbon emissions rights becomes an increasingly scarce resource,increasing the carbon productivity of the economy turns to be the critical path to address the dilemma of green or *** studies the historical evolution of carbon productivity for countries at different development stages as well as ways to enhance such carbon *** type of study provides invaluable lessons for emerging economies to reach their own emission peaks without losing the momentum of *** fossil fuels with new and renewable energy has proven to be an inevitable choice for reshaping the energy system and addressing climate change- it has already become a global *** studies incentives for new energy technology innovation and deplo

关键词： new climate economics low-carbon development energy transformation carbon productivity

Hydrodynamic Characteristics of Square Heaving Plates with Opening Under Forced Oscillation

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China Ocean Engineering 2019年第6期33卷 637-648页

作者： CONG Long-fei teng Bin State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology

The existence of the heaving plates can improve the heaving motion performance of an offshore structure significantly by providing both extra added mass and *** the current research,numerical investigation is carried out on the hydrodynamic characteristics of both isolated square heaving plate and double square heaving plates with opening by an immersed boundary-lattice Boltzmann *** effects on hydrodynamic performance of plates due to Keulegan-Carpenter(KC)number,frequency number,opening ratio,opening distribution and spacing of plates are *** is found that the heaving plates with optimized opening ratio can provide additional damping compared with the plates without *** hydrodynamic characteristics of double plates can be obtained with the increase of plate spacing.

关键词： immersed boundary-lattice Boltzmann method square heaving plate opening shape opening ratio opening distribution plate spacing

术后辅助性TACE对肝细胞癌患者预后的作用

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肝胆外科杂志 2016年第6期24卷 415-422页

作者：杨国荣黄腾飞鲍晓棋黄晓芳吴衢敏武警福建省总队医院外一科福州350004

目的探究术后辅助性动脉化疗栓塞(TACE)对肝细胞癌(Hepatocellular carcinoma,HCC)患者预后的影响。方法回顾性分析本院2005年12月至2009年12月收治的243例行肝癌切除术的原发性肝癌患者的临床病理资料,根据术后是否接受辅助性TACE治疗... 详细信息

目的探究术后辅助性动脉化疗栓塞(TACE)对肝细胞癌(Hepatocellular carcinoma,HCC)患者预后的影响。方法回顾性分析本院2005年12月至2009年12月收治的243例行肝癌切除术的原发性肝癌患者的临床病理资料,根据术后是否接受辅助性TACE治疗分为TACE组(129例)和非TACE组(114例),用Kaplan-Meier法描绘两组的生存曲线,Cox回归模型分析影响HCC患者预后的危险因素。根据巴塞罗纳(BCLC)分期对243例HCC患者进行分层分析,分别探究术后辅助性TACE对0/A期和B期患者的作用。结果 TACE组和非TACE组的1、3、5年的总体生存率分别为84.9%、52.4%、41.1%和84.1%、51.4%和38.9%,差异无统计学意义(P=0.052);1、3、5年的肿瘤复发率分别为28.2%、47.0%、55.5%和34.4%、60.6%、71.1%,差异具有统计学意义(P=0.038)。多因素分析结果显示:丙氨酸氨基转移酶、凝血酶原时间、糖类抗原19-9水平、肿瘤直径、多发肿瘤是影响患者总体生存的独立危险因素;BCLC分期B期、肿瘤直径、微血管侵犯、淋巴结转移是肿瘤复发的独立危险因素,而术后辅助性TACE则具有抗复发作用。分层分析显示103例B期患者中,术后辅助性TACE可以提高患者总体生存率(P=0.016),降低肿瘤复发率(P=0.002);而在0/A期的患者中,术后辅助性TACE对OS和肿瘤复发都无影响。结论术后辅助性TACE能够降低肿瘤复发风险,BCLC分期B期患者应建议其术后接受辅助性TACE治疗。

关键词：肝细胞癌术后辅助性TACE 巴塞罗纳肝癌分期预后

Theoretical Studies on Electronic Structures and Spectroscopy of Fluorescent Arylamino Fumaronitrile

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Chinese Journal of Chemical Physics 2008年第2期21卷 105-110页

作者： Xiao-peng Chen Yu-qi Ding qi-wen teng Department of Chemistry Zhejiang University Hangzhou 310027 China

A new series of fluorescent arylamino fumarinitrile derivatives was designed and optimized using density function theory at the B3LYP/6-31G^＊ level. Based on the optimized geometries, the electronic, fluorescent and 13C NMR spectra are calculated with INDO/CIS, CIS-ZINDO TD, and B3LYP/6-31G^＊ methods, respectively. Starting with the first of the series, the LUMO-HOMO energy gaps of the derivatives become wider and the fluorescent wavelengths and the main peaks in the electronic spectra are blue-shifted owing to the large steric effect of naphthyl rings. On the contrary, the energy gaps of the derivatives turn narrow, and the fluorescent wavelengths and the main peaks in the electronic spectra are red-shifted since hydroxyl groups improve the symmetry and extend the conjugation system. The chemical shifts of sp^2-C on the phenyl rings are moved upfield, while chemical shifts of carbon atoms on the cyano groups and those connected with the cyano groups are changed downfield in the presence of hydroxyl groups.

关键词： Arylamino fumaronitrile Fluorescence Energy gap B3LYP/6-31G^*

Business cases for energy storage with multiple service provision

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Journal of Modern Power Systems and Clean Energy 2016年第4期4卷 615-625页

作者： fei teng Goran STRBAC Imperial College London South Kensington CampusLondonUK

Energy storage(ES)has been considered as the key source of flexibility to support the integration of renewable *** studies have demonstrated the substantial system cost savings by the deployment of ES,including both investment and operation of generation,transmission and distribution ***,this societal benefit may not be realized if industry actors do not have a viable business case to appropriately capture these multiple value *** this context,this paper investigates the value that ES may deliver to its owner over two specific business cases in a 2030 UK ***,the application of large-scale ES in the wholesale market is *** is demonstrated that the optimal allocation of ES to provide multiple services is the key element for ES to become competitive in the electricity *** the second business case,this paper analyses the value of kilowattscale ES combined with roof photovoltaic(PV)system in the household and community *** study shows that multiple service provision of ES through advanced pricing schemes,for example time-of-use(ToU)tariff and dynamic distribution use of system(DUoS),lead to higher value and the coordination in the community level could further justify the application of domestic ES.

关键词： Energy storage Wind generation Business case Electricity market Multiple service provision

A multi-model assessment of climate change damage in China and the world

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Advances in Climate Change Research 2022年第3期13卷 385-396页

作者： Tian-Peng WANG fei teng Institute of Energy Environment and EconomyTsinghua UniversityBeijing 100084China

Quantifying climate damage is essential to informing rational climate policies,but only a few studies have systematically compared the climate damage estimates made by different models,especially for *** this study,we used three widely applied integrated assessment models-FUND,RICE,and PAGE-to estimate the damage under coupled shared socioeconomic pathways and representative concentration pathways(RCPs).Results show that the costs of climate damage constitute approximately 1.5%and 0.7%of China's GDP and global GDP per 1℃ temperature rise on average,*** can reduce climate risk by lowering the average estimate and worst-case effects of climate *** with business-as-usual emissions(RCP8.5),the 2℃ target will reduce the average estimate of climate damage for China and the world by 93%and 87%,respectively,and by 80%and 84%,respectively,in the worst-case *** analysis of climate damage highlights the inconsistency of sector scope and significant parameter uncertainties in damage modules,requiring further improvement to integrate subfield research advances,particularly for damage related to rising sea levels and cooling energy demand.

关键词： Integrated assessment models Climate damage Shared socioeconomic pathways Representative concentration pathways China

Friction and Wear Behavior of AlTiN-Coated Carbide Balls Against SKD11 Hardened Steel at Elevated Temperatures

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Acta Metallurgica Sinica(English Letters) 2018年第10期31卷 1073-1083页

作者： Rui Wang Hai-Juan Mei Ren-Suo Li Quan Zhang teng-fei Zhang qi-Min Wang School of Electromechanical Engineering Guangdong University of Technology Guangzhou 510006 China School of Mechanical Engineering Guilin University of Aerospace Technology Guilin 541004 China

In this study, AlTiN coatings were deposited on YT14 cemented carbide balls by arc ion plating technique. The friction and wear behavior of the AlTiN-coated balls against SKD11 hardened steel was investigated by sliding tests using a ball-ondisk tribometer at various temperatures from 25 to 700 ℃ in air. The results showed that the friction and wear behavior was significantly influenced by the testing temperature. Obvious fluctuations were observed in the friction curves at elevated temperatures, which could be attributed to the formation and rupture of unstable Fe and Cr oxide layers. As the temperature increased from 25 to 500 ~C, the wear rate of the coated balls increased from the scale of 10-21-10-20 m3/ N m, and then decreased to 10-22 m3/N m as the temperature further increased to 700℃. It was also found that the friction and wear behavior of the coated balls was directly dependent on the counterpart materials. As the temperature increased, the main wear mechanism of the coated balls changed from mild abrasive wear and adhesive wear to abrasive wear failure at 500℃, and then transferred to adhesive wear and mild oxidation wear at 700℃. For SKD11 hardened steel, the primary wear mechanism changed from delamination wear to abrasive wear and then transferred to plastic deformation and fatigue wear, accompanied by adhesive wear and tribo-oxidation wear.

关键词： AlTiN. SKD11 hardened steel. Elevated temperatures Friction and wear

Solution-phase synthesis of inorganic nanostructures by chemical transformation from reactive templates

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Science China Chemistry 2010年第2期53卷 365-371页

作者： HUANG teng qi LiMin Beijing National Laboratory for Molecular Sciences(BNLMS) State Key Laboratory for Structural Chemistry of Unstable and Stable SpeciesCollege of ChemistryPeking UniversityBeijing 100871China

The solution-phase synthesis by chemical transformation from reactive templates has proved to be very effective in morphology-controlled synthesis of inorganic nanostructures. This review paper summarizes the recent progress in solution-phase synthesis of one-dimensional and hollow inorganic nanostructures via reactive templates, focusing on the approaches developed in our lab. The formation mechanisms based on reactive templates are discussed in depth to show the general concepts for the preparation processes. An outlook on the future development in this area is also presented.

关键词： reactive template morphology-controlled synthesis nanostructures one-dimensional structures hollow structures