检索结果-南通市图书馆

Constraints on what controls millennial-scale basin-wide denudation across mountain belts, Asia

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2025年第1期68卷 74-93页

作者： Ye YANG Steven A.BINNIE Sheng xu Cong-Qiang LIU Tibor J.DUNAI Institute of Surface-Earth System Science School of Earth System Science Tianjin University Institute of Geology and Mineralogy University of Cologne

The terrestrial cosmogenic nuclide dataset consisting of 123310Be measurements of fluvial sediment samples across the Asian mountain belts is used to constrain the influence of climate,tectonics and topography on Earth-surface denudation processes.10Be-derived basin-wide denudation rates were recalculated using a Monte Carlo simulation approach that relied on pixel-by-pixel production *** rates derived span four orders of magnitude,from 7.4±0.7 mm kyr-1（1σ;Central Tibetan Plateau） to 9,646744+777mm kyr-1（1σ;Southern Tibetan Plateau）,with a median of 186 mm *** our results with the traditional basin-wide production rate scaling model using a centroid coordinate and mean elevation,suggests that 96.6%of production rates will be underestimated using the latter method,especially for basins with a large *** bias between both methods reaches as large as 40%,caused by basin hypsometry and the nonlinear scaling of production rate with elevation and *** of the correlations between uniformly recalculated denudation rates and tectonics,climate,topography and rock lithology will facilitate the extrapolation of denudation rates in unknown basins using available *** the perspective of local scales,precipitation coupled with neotectonics-driven landslides is likely the most influential factor in subtropical Taiwan Island,while topography primarily constrains surface denudation rates in the eastern Tibetan Plateau within a narrow range of *** highland regions with glacier coverage,such as the Pamir,central and southern Tibetan Plateau high denudation rates are affected by glaciation,whereas lower precipitation and high erosion base level may limit river incision and evolving relief in the Central Tibetan *** contrast to local-scale findings highlighting a dominant factor constraining denudation rate,our large-scale quantitative analyses across the Asian mountain belts finds that （1） topographic metrics including

关键词： 10Be-derived denudation rate Climate change Tectonic uplift Topographic gradient Asian mountains

异基因造血干细胞移植联合CD7 CAR-T细胞疗法治疗T淋巴母细胞性淋巴瘤1例报告及文献复习

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

中华血液学杂志 2023年第10期44卷 864-865页

作者：王祥民周屹张姣丽周泓沅张青孙倩李护君徐林艳姚书娜姚志华闫冬梅徐开林桑威徐州医科大学附属医院血液科徐州医科大学血液病研究所骨髓干细胞重点实验室徐州221002 徐州医科大学附属医院康复科徐州221002 郑州大学附属肿瘤医院淋巴综合内科郑州450000

T淋巴母细胞性淋巴瘤(T-LBL)是一种高度侵袭性的血液恶性肿瘤,其特征是骨髓和外周血中浸润未成熟的T细胞,常侵犯纵隔,骨髓和淋巴结,预后差[1]。异基因造血干细胞移植(allo-HSCT)可明显改善T-LBL患者的生存[2],但复发/难治性T-LBL(R/R T-... 详细信息

T淋巴母细胞性淋巴瘤(T-LBL)是一种高度侵袭性的血液恶性肿瘤,其特征是骨髓和外周血中浸润未成熟的T细胞,常侵犯纵隔,骨髓和淋巴结,预后差[1]。异基因造血干细胞移植(allo-HSCT)可明显改善T-LBL患者的生存[2],但复发/难治性T-LBL(R/R T-LBL)患者的预后仍然很差[3]。嵌合抗原受体T细胞(CAR-T)疗法作为一种新兴的治疗手段,近年来在复发/难治性血液系统恶性肿瘤患者中取得了令人鼓舞的疗效[4,5,6]。我们采用allo-HSCT联合CD7 CAR-T细胞疗法治疗1例T-LBL获得满意疗效。

关键词：血液系统恶性肿瘤 CD7 血液恶性肿瘤 LBL 高度侵袭性异基因造血干细胞移植 CAR 预后差

Bearing Fault Diagnosis Based on the Markov Transition Field and SE-IShufflenetV2 Model

在线全文

学校读者我要写书评

暂无评论

Structural Durability & Health Monitoring 2025年第1期19卷 125-144页

作者： Chaozhi Cai Tiexin xu Jianhua Ren Yingfang xue School of Mechanical and Equipment Engineering Hebei University of EngineeringHandan056038China

A bearing fault diagnosis method based on the Markov transitionﬁeld(MTF)and SEnet(SE)-IShufﬂenetV2 model is proposed in this paper due to the problems of complex working conditions,low fault diagnosis accuracy,and poor generalization of rolling ***,MTF is used to encode one-dimensional time series vibration sig-nals and convert them into time-dependent and unique two-dimensional feature ***,the generated two-dimensional dataset is fed into the SE-IShufﬂenetV2 model for training to achieve fault feature extraction and classiﬁ*** paper selects the bearing fault datasets from Case Western Reserve University and Paderborn University to experimentally verify the effectiveness and superiority of the proposed *** generalization performance of the proposed method is tested under the variable load condition and different signal-to-noise ratios(SNRs).The experimental results show that the average accuracy of the proposed method under different working conditions is 99.2%without adding *** accuracy under different working conditions from 0 to 1 HP is 100%.When the SNR is 0 dB,the average accuracy of the proposed method can still reach 98.7%under varying working ***,the bearing fault diagnosis method proposed in this paper is characterized by high accuracy,strong anti-noise ability,and ***,the proposed method can also overcome the inﬂuence of variable working conditions on diagnosis accuracy,providing method support for the accurate diagnosis of bearing faults under strong noise and variable working conditions.

关键词： Bearings Markov transitionﬁeld SE-IShufﬂenetV2

Software-defined process-near-memory architecture using 3D hybrid bonding integration

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(Information Sciences) 2025年第1期68卷 366-378页

作者： Anlin xu Chenchen DENG Jianfeng ZHU Yao WANG Shaojun WEI Leibo LIU School of Integrated Circuits Tsinghua University Beijing Institution of Tracking and Communication Technology Beijing National Research Center for Information Science and Technology Tsinghua University

With the unprecedented explosive growing amount of global data, the development of computing chips, which encounter bottlenecks such as power wall and memory wall, cannot satisfy the demanding requirement. This work proposes a software-defined process-near-memory(SDPNM) computing architecture implemented using 3D hybrid bonding *** software-defined chip architecture, featuring spatial computations and dynamic reconfiguration, innovates in a top-down manner to achieve high energy efficiency while maintaining flexibility after fabrication. The process-near-memory integration further advances the SDNPM chip in a bottom-up way to reduce the energy consumption of data movement while improving the bandwidth. Utilizing a relatively mature fabrication and bonding process can result in feasible solutions for both data-intensive and compute-intensive applications including digital signal processing and artificial intelligence. The logic die is fabricated in the SMIC 40 nm process and the DRAM die is fabricated in the PSMC 25 nm process. The hybrid bonding is implemented by XMC. The experimental results show that the energy efficiency of the proposed SDPNM chip is 33.1× better than the state-of-the-art FPGA ranging from 8.2× to 104.1×.

关键词： software-defined chips process near memory energy efficiency dynamic reconfiguration domain specific

同方期刊数据库

Performance Analysis of a Coupled System based on Organic Rankine Cycle and Double Effect Absorption Refrigeration for Waste Heat Recovery in Data Center

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2025年第1期34卷 188-205页

作者： LI Peng xu Jiaqi WANG Binbin LIU Jianyang ZHAO Wensheng HAN Zhonghe School of Energy Power and Mechanical Engineering North China Electric Power University Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology North China Electric Power University

During data center operation,it generates a significant volume of low-grade waste *** recover waste heat,a coupled system including solar collector,double effect absorption refrigeration and organic Rankine cycle is *** system performance is analyzed in *** the organic Rankine cycle,five organic working fluids(R245fa,R245ca,R123,R11,and R113) are selected.R245fa,R113 and R245ca obtain the maximum net power output,thermal efficiency and exergy efficiency,*** the double effect absorption refrigeration system,the evaporation temperature,condensation temperature,and generation pressure affect the COP and exergy *** the generator pressure is unchanged,the COP increases with increasing evaporation temperature and decreasing condensation *** the COP reaches 1.3,the COP slightly decreases as the evaporation temperature or condensation temperature ***,the exergy efficiency of refrigeration systems exhibits the same trend as the COP,and the exergy efficiency maximum value appears at approximately 0.32.A new performance indicator,rPUE,was defined to evaluate the data center power utilization *** flow distribution ratio and heat source temperature were optimized with multi-objective *** the mass flow distribution rate is 0.6 and the heat source temperature is 441.5 K,rPUE and the total unit production costs of the system obtain the optimal solution.

关键词： Exergy

混合研究视角下护理本科生疫情期间职业态度及心理状况的调查——以丽水市某高校为例

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

丽水学院学报 2021年第2期43卷 36-43页

作者：朱可雯汤斌徐林燕赵磊蓝雪芬丽水学院医学与健康学院浙江丽水323000

为了调查疫情期间护理本科生护理职业态度及心理状况,选择丽水市某高校16名护理本科生进行深度访谈,并采用一般资料调查表、中文版护理职业态度量表和中文版压力知觉量表对该校375名护理本科生进行调查。访谈结果显示,疫情期间护理本科... 详细信息

为了调查疫情期间护理本科生护理职业态度及心理状况,选择丽水市某高校16名护理本科生进行深度访谈,并采用一般资料调查表、中文版护理职业态度量表和中文版压力知觉量表对该校375名护理本科生进行调查。访谈结果显示,疫情期间护理本科生存在不同程度的负性情绪,并对护理职业有了更深刻的认识,但在未来应对突发公共卫生事件中自觉应对能力和信心尚不足。问卷结果显示:职业态度问卷总均分(111.16±13.84)分,各条目平均分(4.11±0.95)分,总体中等偏正向;压力知觉平均值为(40.23±6.45)分,处于较高水平。护理教育者应加强对其职业态度的教育和引导,注重疏导其心理压力,在未来的教学中应整合加入公共卫生事件应急相关的课程。

关键词：新冠肺炎护理本科生护理职业态度心理状况

Morphological Mechanism and Experimental Verification of Self-healing of Basalt-fiber Modified Water-soaked Asphalt

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 171-186页

作者： XIAO Minmin DONG Jinyong LI Chunyan GUO xu REN Jianguo School of Urban Construction and Safety Engineering Shanghai Institute of TechnologyShanghai 201418China

This study investigates the mechanism of action of representative molecules of basalt fibers on the healing of water-soaked *** parameters,morphological characteristics,interfacial healing energy,and interfacial healing strength were analyzed using molecular dynamics and macroscopic tests under different time,temperature,and water conditions to evaluate the specific states and critical conditions involved in *** results indicate that basalt-fiber molecules can induce rearrangement and a combination of water-soaked asphalt at the healing *** groups with different bonding states increase the interfacial adsorption capacity of water-soaked *** interaction between basalt fiber molecules and water molecules leads to a"hoop"phenomenon,while aromatics-2 molecules exhibit a"ring band aggregation"*** former reduces the miscibility of water and asphalt molecules,while the latter causes slow diffusion of the ***,a micro-macro dual-scale comparison of interfacial healing strength was conducted at temperatures of 297.15 and 312.15 K to identify the strength transition point and critical temperature of 299.4 K during the self-healing process of basalt-fiber modified water-soaked asphalt.

关键词： water-soaked asphalt basalt-fibers self-healing properties moisture status molecular characterization

Recent progress in exploring heterogeneous catalyst surface chemistry with near ambient pressure XPS

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年

作者： Yuanjie xu Zemin An Yu Tang Institute of Molecular Engineering Plus Institute of Molecule Catalysis and In Situ/Operando Studies College of Chemistry Fuzhou University

X-ray photoelectron spectroscopy(XPS) is a crucial surface analysis technique that has become a key tool in the study of heterogeneous catalysis. Detecting surface chemistry under conditions that closely mimic actual industrial catalytic processes is essential for understanding the mechanisms involved. In the past decade, near ambient pressure X-ray photoelectron spectroscopy(NAP-XPS) has been increasingly utilized to study the surface chemistry of catalysts during heterogeneous catalytic processes, offering insights into structure-performance correlations. This review begins with a brief overview of NAP-XPS instrumentation. Next, we discuss the application of NAP-XPS in the study of thermal catalysis reactions, followed by a summary of the research on catalyst restructuring under reaction conditions. Additionally, we address the challenges and future perspectives for the development and application of NAP-XPS. Catalysis is inherently dynamic, requiring an understanding of the real-time behavior of catalysts under varying conditions. Therefore, future improvements in the ability to probe reaction intermediates with higher spatial and temporal resolution under conditions that closely mimic industrial environments are needed.

关键词：

Normalized Solutions of Nonlinear Choquard Equations with Nonconstant Potential

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

应用数学 2025年第1期38卷 14-29页

作者： LI Nan xu Liping School of Mathematics and Statistics Henan University of Science and TechnologyLuoyang 471000China

In this paper,we mainly focus on a type of nonlinear Choquard equations with nonconstant *** appropriate hypotheses on potential function and nonlinear terms,we prove that the above Choquard equation with prescribed 2... 详细信息

关键词： Nonlinear Choquard equation Potential function Variational method Normalized solution