检索结果-南通市图书馆

维普期刊数据库博看期刊

Crustal structure beneath the Hi-CliMB seismic array in the central-western Tibetan Plateau from the improved H-κ-c method

在线全文

学校读者我要写书评

暂无评论

Earthquake Science 2021年第3期34卷 199-210页

作者： jiangtao li Xiaodong Song Department of Geophysics School of Geodesy and GeomaticsWuhan UniversityWuhan 430079China Institute of Theoretical and Applied Geophysics School of Earth and Space SciencesPeking UniversityBeijing 100871China

The Hi-CliMB seismic array is located in the central-western Tibetan *** H-κ-c method(li JT et al.,2019)was applied to receiver function data on the HiCliMB,which corrects the back-azimuthal variations in the arrival times of Ps and crustal multiples caused by crustal anisotropy and dipping interfaces before performing H-κ*** to the traditional H-κmethod,the H-κstacking results after harmonic corrections showed considerable improvements,including greatly reduced errors,significantly less scattered H(crustal thickness)andκ(crustal v_(P)/v_(S)ratio)values,and clearer patterns of H andκin different Tibetan *** demonstrates that the H-κ-c method works well even for regions with complex crustal structures,such as the Tibetan Plateau,when there are helpful references from nearby stations or other *** variation in crustal thickness agrees with previous studies but tends to be relatively shallower beneath most of the *** regions with particularly high crustal v_(P)/v_(S)were observed,namely,one in the northern Himalaya block and beneath the YarlungZangbo suture,and the other in the Qiangtang *** correlation with mid-crust low S velocities from previous studies suggests the possible presence of fluid or partial melt in the two regions,which may have implications for the crustal flow *** contrast,the Lhasa block had relatively lower crustal v_(P)/v_(S)and relatively higher crustal S velocity within the plateau,which is interpreted to be mechanically stronger than the Himalaya and Qiangtang blocks,and without mid-crust partial melt.

关键词： H-κ-c methodreceiver function Hi-CliMB crustal thickness crustal v_(P)/v_(S)ratio

焙烧镁铝水滑石脱除厌氧消化沼气中CO_(2)的效果及机制

在线全文

学校读者我要写书评

暂无评论

化工进展 2024年第9期43卷 5250-5261页

作者：吴宇琦李江涛丁建智宋秀兰苏冰琴太原理工大学土木工程学院山西太原030024 煤炭工业太原设计研究院集团有限公司山西太原030000

厌氧消化沼气中含有的CO_(2)会降低沼气利用价值,高效去除CO_(2)是沼气利用领域的研究热点。焙烧镁铝水滑石具有良好的CO_(2)吸附性能,本文利用响应面法的Box-Behnken模型优化CO_(2)吸附条件,考察吸附剂剂量、焙烧温度和反应温度对吸附... 详细信息

厌氧消化沼气中含有的CO_(2)会降低沼气利用价值,高效去除CO_(2)是沼气利用领域的研究热点。焙烧镁铝水滑石具有良好的CO_(2)吸附性能,本文利用响应面法的Box-Behnken模型优化CO_(2)吸附条件,考察吸附剂剂量、焙烧温度和反应温度对吸附效果的影响;通过吸附材料表征、吸附过程测定分析吸附作用机制。实验结果表明,吸附剂剂量、焙烧温度和反应温度均对CO_(2)吸附有显著影响,最适宜的吸附条件为:投加量0.016g/m L、400℃焙烧、55℃反应。在此条件下,沼气中的CO_(2)体积分数从23.51%降至0,CO_(2)吸附容量为0.625mmol/g,CH4回收率为94.7%,经过6次循环吸附后,吸附剂仍具有良好的再生性能。吸附过程及吸附材料的X射线衍射、扫描电子显微镜、傅里叶变换红外光谱、比表面积、等电点及孔结构测试结果表明,焙烧镁铝水滑石的吸附过程十分迅速,表面碱性位点吸附及层间阴离子插层作用同时促进了CO_(2)吸附。

关键词：焙烧镁铝水滑石厌氧消化沼气 CO_(2)吸附响应面法优化设计吸附机理

Calcium-magnesium-alumina-silicate(CMAS)resistant high entropy ceramic(Y_(0.2)Gd_(0.2)Er_(0.2)Yb_(0.2)Lu_(0.2))_(2)Zr_(2)O_(7) for thermal barrier coatings

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第12期107卷 259-265页

作者： Shuxiang Deng Gang He Zengchao Yang Jingxia Wang jiangtao li Lei Jiang Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of the Chinese Academy of SciencesBeijing 100049China Key Laboratory of Bio-Inspired Materials and Interface Sciences Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

A novel high-entropy material,(Y_(0.2)Gd_(0.2)Er_(0.2)Yb_(0.2)Lu_(0.2))_(2)Zr_(2)O_(7)was successfully synthesized by the solid state reaction method and spark plasma sintering,and investigated as a promising thermal barrier coating ***-earth elements were distributed homogeneously in the pyrochlore *** was found that the prepared high-entropy ceramic maintains pyrochlore structure at the temperature up to 1600℃,and it possesses a similar thermal expansion coefficient(10.2×10^(−6)K^(−1) at 25-900℃)to that of YSZ,low thermal conductivity(<0.9 W m^(-1)K^(−1) at 100-1000℃)and good CMAS resistance(infiltration depth is 22μm after annealed at 1300℃for 24 h).The corrosion process was investigated,and RE elements distributing homogeneously in(Y_(0.2)Gd_(0.2)Er_(0.2)Yb_(0.2)Lu_(0.2))_(2)Zr_(2)O_(7)show different diffusion rates in ***^(3+) with a larger radius(closer to Ca^(2+))is easier to react with CMAS to form an apatite phase.

关键词： High-entropy ceramic Pyrochlore structure Thermal barrier coating material CMAS resistance

基于光合法和生物量法分析塔里木沙漠公路防护林带碳汇估算差异性

在线全文

学校读者我要写书评

暂无评论

新疆农业科学 2024年第8期61卷 2014-2022页

作者：李汝勇任久明雷霆王克林刘鹏程李江涛中国石油天然气股份有限公司塔里木油田分公司新疆库尔勒841000 新疆红杉科技服务有限公司乌鲁木齐830000

【目的】研究基于光合法和生物量法分析塔里木沙漠公路防护林带碳汇估算差异性,为干旱荒漠区人工林管护和碳储量的评估提供科学依据。【方法】以新疆塔克拉玛干沙漠公路沿线人工防护林为研究对象,对比光合速率模型和生物量模型,估算防... 详细信息

【目的】研究基于光合法和生物量法分析塔里木沙漠公路防护林带碳汇估算差异性,为干旱荒漠区人工林管护和碳储量的评估提供科学依据。【方法】以新疆塔克拉玛干沙漠公路沿线人工防护林为研究对象,对比光合速率模型和生物量模型,估算防护林带3种主要建林植物各自光合速率及筛选最优生物量模型,进而估算其固碳能力及碳储量。【结果】3种植物在光合固碳模型中,单位叶面积固碳量差异显著,表现为梭梭>沙拐枣>柽柳;3种植物生物量最优模型均为幂函数,预测值与实测值回归决定系数在90%以上。光合固碳法估算得到的沙漠公路防护林带总固碳量为567431.68 t,生物量法估算的值为565083.75 t,2种方法估算得到的固碳量相当。【结论】3种植物固氮量差异显著(梭梭>沙拐枣>柽柳),模型效果精确可靠。

关键词：光合固碳法生物量固碳法碳汇估算预测模型

Statistical theory for a hydrogen bonding fluid system of A_aD_d type (Ⅳ): Depletion potential between colloid particles

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2012年第6期55卷 1160-1166页

作者： GU Fang WANG HaiJun li jiangtao College of Chemistry and Environment Science Hebei University Baoding 071002 China Key Laboratory of Medicinal Chemistry and Molecular Diagnosis Ministry of Education Hebei University Baoding 071002 China Chemical Biology Key Laboratory of Hebei Province Hebei University Baoding 071002 China International Centre for Materials Physics Chinese Academy of Sciences Shenyang 110016 China

The depletion potential between two colloid particles immersed in a hydrogen bonding fluid has been investigated by density functional theory. The study is motivated by the wide applications of hydrogen bonding fluids in the field of colloid science, and the effects of relevant factors on the depletion potential and depletion force between colloid particles have been studied. These factors include the size ratio of the colloid particle to the fluid molecule, the bulk density of the fluid, the functionality (the number of proton acceptors a and proton donors d) and hydrogen bonding strength as well as the colloid-fluid interaction energy. By comparing the depletion potential calculated under various conditions, it is shown that the effects of these factors on the depletion potential are very significant, and in particular in regulating the depletion force and its range.

关键词： hydrogen bonding fluid depletion potential density functional theory colloid particle

Rates of bacterial sulfate reduction and their response to experimental temperature changes in coastal sediments of Qi'ao Island, Zhujiang River Estuary in China

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2014年第8期33卷 10-17页

作者： WU Zijun ZHOU Huaiyang PENG Xiaotong li jiangtao CHEN Guangqian State Key Laboratory of Marine Geology Tongji University Guangzhou Institute of Geochemistry Chinese Academy of Sciences

Subtropical sediment cores （QA09-1 and QA12-9） from the coastal zone of Qi’ao Island in the Zhujiang River Estuary were used to determine the rates of sulfate reduction and their response to experimental tempera-ture changes. The depth distribution of the sulfate reduction rates was measured from whole-core incu-bations with radioactive tracer35SO42-, and peaks of 181.19 nmol/（cm3·d） and 107.49 nmol/（cm3·d） were exhibited at stations QA09-1 and QA12-9, respectively. The profiles of the pore water methane and sulfate concentrations demonstrated that anaerobic oxidation of methane occurred in the study area, which result-ed in an increase in the sulfate reduction rate at the base of the sulfate-reducing zone. Meanwhile, the sulfate concentration was not a major limiting factor for controlling the rates of sulfate reduction. In addition, the incubation of the sediment slurries in a block with a temperature gradient showed that the optimum tem-perature for the sulfate reduction reaction was 36°C. The Arrhenius plot was linear from the lowest tempera-ture to the optimum temperature, and the activation energy was at the lower end of the range of previously reported values. The results suggested that the ambient temperature regime of marine environments prob-ably selected for the microbial population with the best-suited physiology for the respective environment.

关键词： sulfate reduction rate temperature-gradient incubations 35SO42- tracer Qi’ao Island

Transmission Use of System Charging for Differentiating Long-term Impacts from Various Generation Technologies

在线全文

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2016年第2期2卷 11-19页

作者： jiangtao li Chenghong Gu Rohit Bhakar Furong li Department of Electronic and Electrical Engineering University of BathBathBA27AYU.K.

This paper proposes a novel transmission use of system(TUoS)charging method,which is able to 1)acknowledge the trade-offs between short-run congestion cost and long-run investment cost when justifying economic network investment,2)identify the impacts of different generation technologies on congestion cost and network investment,and 3)translate these impacts into economically efficient TUoS tariffs that differentiate generation *** incremental capacity change from a generator will impact the congestion costs at each branch,which is then translated into the impacts on investment time *** difference in the present values with and without the incremental change for a branch is its long-run incremental cost(LRIC).The final TUoS tariff for this generator is the sum of all LRIC triggered by its capacity *** proposed method is demonstrated on a modified IEEE 14-bus system to show its effectiveness over the traditional *** show that it can provide cost-reflective TUoS tariffs for different generation technologies at the same sites by examining their respective impacts on congestion and *** thus can incentivize appropriate generation expansion to reduce congestion costs and ultimately network investment cost.

关键词： Congestion cost allocation congestion management long-run incremental cost transmission investments transmission use of system charging

单中心85例初治滤泡淋巴瘤临床特征、预后分析及老年综合评估

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中华血液学杂志 2024年第3期45卷 233-241页

作者：尹晶晶钱龙白洁菲冯茹李江涛王婷张春丽刘辉北京医院血液科、国家老年医学中心、中国医学科学院老年医学研究院北京100730

目的探讨初治滤泡淋巴瘤(FL)患者的临床特征与预后,以及老年综合评估(comprehensive geriatric assessment,CGA)对国内年龄≥60岁FL患者的预后价值。方法收集2011年8月至2022年6月北京医院血液科收治的85例初诊FL患者临床资料及预后情... 详细信息

目的探讨初治滤泡淋巴瘤(FL)患者的临床特征与预后,以及老年综合评估(comprehensive geriatric assessment,CGA)对国内年龄≥60岁FL患者的预后价值。方法收集2011年8月至2022年6月北京医院血液科收治的85例初诊FL患者临床资料及预后情况。统计分析患者临床特征、实验室指标、治疗疗效、生存及预后因素,使用多种老年评估工具对患者预后分层。结果①FL患者多为中老年起病,中位发病年龄59(20~87)岁,其中年龄≥60岁者41例(48.2%),男女比例为1∶1.36。77.6%的患者诊断时Ann Arbor分期为Ⅲ~Ⅳ期,伴有B症状17例(20.0%),骨髓侵犯最常见(34.1%)。②71例患者接受一线系统化疗和(或)免疫治疗,可评估疗效的68例患者中总缓解率为86.8%,完全缓解率为47.1%。其中17例(23.9%)患者在治疗2年内病情进展或复发,共计10例(14.1%)患者死亡。③R-CHOP治疗组生存分析示:中位随访52.9(10.2~138.8)个月,3年无进展生存(PFS)率及总生存(OS)率分别为85.2%和95.9%,5年PFS率及OS率为72.8%和88.8%。单因素分析年龄≥60岁(HR=3.430,95%CI 1.256~9.371,P=0.016)、B症状(HR=5.030,95%CI 1.903~13.294,P=0.001)、预后营养指数(PNI)liPI)高危(HR=2.918,95%CI 1.074~7.928,P=0.036)、PRIMA预后指数(PRIMA-PI)高危(HR=2.745,95%CI 1.057~7.129,P=0.038)是PFS的不良预后因素。POD24(HR=9.160,95%CI 1.202~69.830,P=0.033)是OS的不良预后因素。多因素分析中年龄≥60岁(HR=3.002,95%CI 1.014~8.889,P=0.047),B症状(HR=3.810,95%CI 1.052~13.801,P=0.042)能独立预测PFS,未发现影响OS的独立预测因素。结论FL多为中老年女性患者。年龄、B症状、PNI、FliPI、PRIMA-PI、POD24是影响FL患者PFS和OS的重要因素。CGA对预测老年FL预后及指导治疗均可能具有一定价值。

关键词：淋巴瘤,滤泡性生存分析老年综合评估

基于BOBYQA算法毛细管电泳弯管效应的优化

在线全文

学校读者我要写书评

暂无评论

传感器与微系统 2024年第8期43卷 114-117页

作者：李江涛李风娟赵群喜刘泽锋于佳佳马保建新疆理工学院机电工程学院新疆阿克苏843100 国网温州供电公司浙江温州325000

本文通过数值仿真分析了毛细管U型弯管输运过程弯管效应的产生机理,分析了不同Pe数下浓度脉冲受弯管效应的影响,并基于梯度自由优化(BOBYQA)算法对弯管壁面Zeta电位分布进行优化。研究结果表明:利用有限元建模和BOBYQA算法可快速实现微... 详细信息

本文通过数值仿真分析了毛细管U型弯管输运过程弯管效应的产生机理,分析了不同Pe数下浓度脉冲受弯管效应的影响,并基于梯度自由优化(BOBYQA)算法对弯管壁面Zeta电位分布进行优化。研究结果表明:利用有限元建模和BOBYQA算法可快速实现微通道弯管壁面Zeta电位分布的优化,有效抑制了微通道内弯管效应,优化后的浓度脉冲带宽长度相比优化前得以减小,弯管处流场速度分布得到改善。对微流控系统中物质分离检测及芯片设计有一定参考价值。

关键词：毛细管电泳弯管效应电渗流梯度自由优化算法