检索结果-南通市图书馆

肋片交错距离影响HFE-7100沸腾换热研究

在线全文

学校读者我要写书评

暂无评论

工程热物理学报 2024年第8期45卷 2375-2381页

作者：吴裕王宏朱恂陈蓉丁玉栋吴君军廖强低品位能源利用技术及系统教育部重点实验室重庆400030 重庆大学工程热物理研究所重庆400030

随着电子元器件发热量的持续增加,传统的风冷散热已经无法满足当前数据中心的散热和节能的双重需求,而高效的沸腾换热技术是解决目前数据中心散热瓶颈的重要手段。为了进一步提升沸腾换热性能,本文设计了交错排列的肋片表面,研究了肋片... 详细信息

随着电子元器件发热量的持续增加,传统的风冷散热已经无法满足当前数据中心的散热和节能的双重需求,而高效的沸腾换热技术是解决目前数据中心散热瓶颈的重要手段。为了进一步提升沸腾换热性能,本文设计了交错排列的肋片表面,研究了肋片结构对工质再润湿与气泡聚并脱离行为的影响,分析了沸腾换热时气泡群的行为特征,并测试了肋片结构参数对于沸腾换热的影响。实验结果表明,肋片的交错排布强化了液相的补充能力,延缓了表面的烧干,并将临界热流密度提升至44.45 W/cm^(2),相对光滑表面提升了100.4%,当肋片间距为0.5 mm时,能够获得最佳的沸腾换热系数2.50 W/(cm^(2)·K),相对光滑表面提升了229%,本文研究结果为沸腾相变换热表面结构设计提供了指导。

关键词：电子散热池沸腾肋片强化换热

Molecular dynamics simulation of injection of polyethylene fluid in a variable cross-section nano-channel

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2011年第17期56卷 1848-1856页

作者： FENG Jie LIAO Qiang ZHU Xun WU Rui WANG Hong ding yudong YASHIRO Kisaragi Institute of Engineering Thermophysics Chongqing University Chongqing 400030 China Key Laboratory of Low-grade Energy Utilization Technologies and Systems Ministry of Education Chongqing 400030 China College of Mechanical Engineering Kobe University Kobe 657-8501 Japan

Numerical simulation of injection of polyethylene fluid in a variable cross-section nano-channel was carried out using the molecular dynamics *** effects of the nano-channel cross-section and the external force on the rheological behavior and structural properties of the polyethylene fluid were *** was found that an absorbed layer appeared near the wall and the thickness of the absorbed layer increased with increasing cone angle of the *** injection distance of the polyethylene fluid decreased with increasing cone angle and decreasing external *** the nano-channel with cone angle 45°,polyethylene particles uniformly filled the whole channel and were stretched along the flow *** stretching of particles was enhanced when the external force was strengthened,which facilitates injection of the polyethylene fluid into the nano-channel.

关键词：纳米通道分子动力学模拟聚乙烯变截面注射液分子动力学方法颗粒增强数值模拟

在线全文

学校读者我要写书评

暂无评论

单离子光频标离子囚禁技术

宇航计测技术 2024年第1期44卷 14-19页

作者：纪仟仟韩蕾孙婧昕陈星苏亚北陈煜申彤丁余东薛潇博北京无线电计量测试研究所计量与校准技术重点实验室北京100039

离子囚禁技术与系统是量子频标、量子计算的核心技术和核心物理参考体系,在精密测量、量子计算、高精度导航定位等领域具有重要的应用价值与应用前景。设计研制了一种基于Paul型离子阱的离子制备与囚禁系统,利用数字PID方法进行多通道... 详细信息

离子囚禁技术与系统是量子频标、量子计算的核心技术和核心物理参考体系,在精密测量、量子计算、高精度导航定位等领域具有重要的应用价值与应用前景。设计研制了一种基于Paul型离子阱的离子制备与囚禁系统,利用数字PID方法进行多通道多波长激光频率锁定,对离子进行光离化制备、囚禁、激光Doppler冷却。试验系统探测到了单离子的微弱荧光信号,实现了单个离子的稳定囚禁;激光频率漂移由500 MHz稳定至±0.8 MHz,激光冷却温度达到5.53 mK,趋于Doppler冷却极限。

关键词：离子囚禁激光多普勒冷却光离化光频标

Configuration with Low Central Magnetic Shear Formed in Pellet Injection Discharge on HL-2A

在线全文

学校读者我要写书评

暂无评论

Southwestern Institute of Physics Annual Report

Southwestern Institute of Physics Annual Report 2006年第1期 99-101页

作者： GAO Qingdi LONG Yongxing ding Xuantong PAN yudong

Control and optimization of the plasma current profile is a key point in enhancing the plasma performance. Although several tools have been identified to modify transport directly, the effect of the current profile on transport is large and remains an important transport control feature. In the tokamak experiments it is demonstrated that the configuration with flat q-profile in the central plasma region is beneficial to improve plasma confinement. Discharges with internal transport barrier （ITB） have been established with low magnetic shear （so called optimized shear operation mode） in JET and ASDEX Upgrade.

关键词： HL-2A 电离子电流量磁性核物理学

Homogenous coating of Li^(+)conductive Li_(5)AlO_(4)on single-crystalline nonstoichiometric Li_(1.04)Ni_(0.92)Al_(0.04)O_(2)for rechargeable lithium-ion batteries

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

Journal of Energy Chemistry 2024年第8期95卷 651-659,I0014页

作者： Guoyu ding Shizhou Wang Jinhan Li Ziyan Wu Jiayu Chen Jiayong Du Xinhui Huang Kuiming Liu yudong Zhang Zhonghan Wu Yiyang Peng Qiancheng Zhao Meng Yu Fangyi Cheng Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Engineering Research Center of High-efficiency Energy Storage(Ministry of Education)College of ChemistryNankai UniversityTianjin 300071China State Key Laboratory of Advanced Chemical Power Sources Nankai UniversityTianjin 300071China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Cobalt-free,nickel-rich LiNi_(1-x)Al_(x)O_(2)(x≤0.1)is an attractive cathode material because of high energy density and low cost but suffers from severe structural degradation and poor rate *** this study,we propose a molten salt-assisted synthesis in combination with a Li-refeeding induced aluminum segregation strategy to prepare Li_(5)AlO_(4)-coated single-crystalline slightly Li-rich Li_(1.04)Ni_(0.92)Al_(0.04)O_(2).The symbiotic formation of Li_(5)AlO_(4)from reaction between molten lithium hydroxide and doped aluminum in the bulk ensures a high lattice matching between the Ni-rich oxide and the homogenous conductive Li_(5)AlO_(4)that permits high Li^(+)*** from mitigated undesirable side reactions and phase evolution,the Li_(5)AlO_(4)-coated single-crystalline Li_(1.04)Ni_(0.92)Al_(0.04)O_(2)delivers a high specific capacity of220.2 mA h g^(-1)at 0.1 C and considerable rate capability(182.5 mA h g^(-1)at 10 C).Besides,superior capacity retention of 90.8%is obtained at 1/3 C after 100 cycles in a 498.1 mA h pouch full ***,the particulate morphology of Li_(1.04)Ni_(0.92)Al_(0.04)O_(2)remains intact after cycling at a cutoff voltage of 4.3 V,whereas slightly Li-deficient Li_(0.98)Ni_(0.97)Al_(0.05)O_(2)features intragranular cracks and irreversible lattice *** results highlight the value of molten salt-assisted synthesis and Li-refeeding induced elemental segregation strategy to upgrade Ni-based layered oxide cathode materials for advanced Li-ion batteries.

关键词： Aluminum segregation Surface coating Nonstoichiometric oxides Molten synthesis Cathode materials

Sequential neoadjuvant chemotherapy using pegylated liposomal doxorubicin and cyclophosphamide followed by taxanes with complete trastuzumab and pertuzumab treatment for HER2-positive breast cancer: A phase Ⅱ single-arm study

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Cancer Research 2024年第1期36卷 55-65页

作者： Yaping Yang Liang Jin yudong Li Nanyan Rao Chang Gong Shunrong Li Jiannan Wu Jinghua Zhao Linxiaoxiao ding Fengxia Gan Jun Zhang Ruifa Feng Zhenzhen Liu Qiang Liu Breast Tumor Center Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene RegulationGuangzhou 510120China Department of Thyroid and Breast Surgery Shenzhen Qianhai Shekou Free Trade Zone HospitalShenzhen 518000China Breast and Thyroid Surgery Guilin Medical College Second Affiliated HospitalGuilin 541199China Department of Breast Disease Henan Breast Cancer Centerthe Affiliated Cancer Hospital of Zhengzhou University&Henan Cancer HospitalZhengzhou 450008China

Objective: Despite cardiotoxicity overlap, the trastuzumab/pertuzumab and anthracycline combination remains crucial due to significant benefits. Pegylated liposomal doxorubicin(PLD), a less cardiotoxic anthracycline, was evaluated for efficacy and cardiac safety when combined with cyclophosphamide and followed by taxanes with trastuzumab/pertuzumab in human epidermal growth factor receptor-2(HER2)-positive early breast cancer(BC).Methods: In this multicenter, phase II study, patients with confirmed HER2-positive early BC received four cycles of PLD(30-35 mg/m^(2)) and cyclophosphamide(600 mg/m^(2)), followed by four cycles of taxanes(docetaxel,90-100 mg/m^(2) or nab-paclitaxel, 260 mg/m^(2)), concomitant with eight cycles of trastuzumab(8 mg/kg loading dose,then 6 mg/kg) and pertuzumab(840 mg loading dose, then 420 mg) every 3 weeks. The primary endpoint was total pathological complete response(tp CR, yp T0/is yp N0). Secondary endpoints included breast p CR(bp CR),objective response rate(ORR), disease control rate, rate of breast-conserving surgery(BCS), and safety(with a focus on cardiotoxicity).Results: Between May 27, 2020 and May 11, 2022, 78 patients were treated with surgery, 42(53.8%) of whom had BCS. After neoadjuvant therapy, 47 [60.3%, 95% confidence interval(95% CI), 48.5%-71.2%] patients achieved tp CR, and 49(62.8%) achieved bp CR. ORRs were 76.9%(95% CI, 66.0%-85.7%) and 93.6%(95% CI,85.7%-97.9%) after 4-cycle and 8-cycle neoadjuvant therapy, respectively. Nine(11.5%) patients experienced asymptomatic left ventricular ejection fraction(LVEF) reductions of ≥10% from baseline, all with a minimum value of >55%. No treatment-related abnormal cardiac function changes were observed in mean N-terminal pro-BNP(NT-pro BNP), troponin I, or high-sensitivity ***: This dual HER2-blockade with sequential polychemotherapy showed promising activity with rapid tumor regression in HER2-positive BC. Importantly, this regimen showed an acceptable safety

关键词： Breast cancer HER2-positive breast cancer dual HER2 blockade neoadjuvant therapy sequential therapy

在线全文

学校读者我要写书评

暂无评论

速度对液滴撞击超疏水壁面行为特性的影响

化工学报 2012年第10期63卷 3027-3033页

作者：杨宝海王宏朱恂丁玉栋周劲重庆大学工程热物理研究所低品位能源利用技术及系统教育部重点实验室重庆400030

通过可视化实验研究了直径为2.58mm的液滴在不同速度下撞击静态接触角为156°超疏水壁面后的运动特性,其液滴Weber数在8～310之间。实验利用光学原理在同一画面上同时记录了液滴撞击壁面过程的正面及底面图像。实验结果表明:液滴撞击壁... 详细信息

通过可视化实验研究了直径为2.58mm的液滴在不同速度下撞击静态接触角为156°超疏水壁面后的运动特性,其液滴Weber数在8～310之间。实验利用光学原理在同一画面上同时记录了液滴撞击壁面过程的正面及底面图像。实验结果表明:液滴撞击壁面的速度对液滴的前进角、后退角,三相接触线的速度以及液滴反弹后的空中运动特性都有较大的影响;液滴高速撞击超疏水壁面后会产生明显的液指及多组卫星液滴,回缩阶段相邻的液指发生聚并直至液滴完全回缩。

关键词：超疏水壁面液滴撞击动力行为可视化实验

在线全文

学校读者我要写书评

暂无评论

液滴撞击不同浸润性壁面动态过程的数值模拟

化工学报 2013年第8期64卷 2745-2751页

作者：梁超王宏朱恂陈蓉丁玉栋廖强重庆大学低品位能源利用及系统教育部重点实验室重庆400030 重庆大学工程热物理研究所重庆400030

采用VOF方法模拟了液滴以相同速度撞击到接触角分别为63°、90°、118°和160°的固体壁面上的形态演变过程。结果表明:固壁的亲憎水性对液滴撞击表面后形态的演化有较大影响,亲水壁面有利于液滴的铺展,在接触角为90°的壁面上液滴部分... 详细信息

采用VOF方法模拟了液滴以相同速度撞击到接触角分别为63°、90°、118°和160°的固体壁面上的形态演变过程。结果表明:固壁的亲憎水性对液滴撞击表面后形态的演化有较大影响,亲水壁面有利于液滴的铺展,在接触角为90°的壁面上液滴部分反弹,而当接触角为160°时,液滴完全反弹;当三相接触线开始回缩时,中心液体的表层部分在惯性力的作用下继续向铺展的液滴边缘聚集,导致近中心处液膜逐渐减薄至断裂,最终形成边缘较厚的液环;同时,液滴最大铺展系数随壁面接触角的增大而减小,达到最大铺展系数的时间也相应缩短。

关键词：液滴撞击壁面浸润性铺展系数动态过程

在线全文

学校读者我要写书评

暂无评论

知网和万方收录学位论文全文数量的对比分析

情报杂志 2011年第9期30卷 56-60页

作者：丁玉东张春峰燕山大学图书馆秦皇岛066004

利用XMLHttpRequest对象结合正则表达式收集中国知网和北京万方两家数据库商的全部博、硕士论文全文的部分字段信息。使用Access软件结合SQL语句,对数据库收录的"211工程"单位、非高校单位和全部单位的数量随年度变化的情况,对博、硕士... 详细信息

利用XMLHttpRequest对象结合正则表达式收集中国知网和北京万方两家数据库商的全部博、硕士论文全文的部分字段信息。使用Access软件结合SQL语句,对数据库收录的"211工程"单位、非高校单位和全部单位的数量随年度变化的情况,对博、硕士论文全文数量及重复数量,对收录同一单位论文数量的差距、学位授予单位的收录稳定性等进行了比较。认为知网在收录学位论文全文数量上暂据优势,但万方也有自己的特色。为学术机构采购学位论文数据库提供参考数据。

关键词：知网万方学位论文全文数量