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Determination of the liquidus and solidus temperatures of FeCrAl stainless steel

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International Journal of Minerals,Metallurgy and Materials 2015年第11期22卷 1141-1148页

作者： Zhi-biao Han Jian-hua liu Yang He kang-wei li Yi-long Ji Jian liu Research Institute of Metallurgy Engineering University of Science and Technology Beijing

The liquidus and solidus temperatures of FeCrAl stainless steel were determined by differential scanning calorimetry（DSC） at different heating rates. They were also calculated by Thermo-calc software and empirical formulae separately. The accuracy of calculation results was assessed by comparison with the corresponding DSC results. The liquidus temperatures calculated by empirical formulae, which exhibited a maximum deviation of 8.6℃ were more accurate than those calculated using Thermo-calc, which exhibited a maximum deviation of 12.11℃. On the basis of Thermo-calc calculations performed under the Scheil model, the solidus temperature could be well determined from solid fraction（fS） vs. temperature（t） curves at fS = 0.99. Furthermore, a theoretical analysis to determine the solidus temperature with this method was also provided.

关键词： ferritic stainless steel liquidus temperature solidus temperature differential scanning calorimetry

Benefits of intra-operative systemic chemotherapy during curative surgery in patients with locally advanced gastric cancer

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Chinese Medical Journal 2013年第18期126卷 3493-3498页

作者： MENG Qing-bin YU Jian-chun MA Zhi-qiang kang wei-ming ZHOU li YE Xin Department of General Surgery Peking Union Medical College Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100730 China

Background There is little information on the impact of intra-operative systemic chemotherapy on gastric cancer. The aim of this study was to identify prognostic factors in patients with locally advanced gastric cancer and undergoing curative resection, with a focus on evaluating survival benefits and tolerance of intra-operative systemic chemotherapy. Methods We retrospectively analyzed clinicopathological data for 264 consecutive patients who underwent curative resection for gastric cancer at Peking Union Medical College Hospital from January 2002 to January 2007. Survival curves were plotted using the Kaplan-Meier method and compared using log-rank tests. Univariate and multivariate analyses were performed with the Cox proportional hazard model. Results Patients who received intra-operative systemic chemotherapy had higher 5-year overall survival and 5-year disease-free survival rates （P=-0.019 and 0.010, respectively） than patients who did not receive intra-operative systemic chemotherapy. In the subgroup analysis, systemic intra-operative chemotherapy benefited the 5-year overall survival and disease-free survival rates for patients with cancer of stage pTNM IB-IIIB, but not stage pTNM IIIC. Patients who received intra-operative systemic chemotherapy in combination with post-operative chemotherapy had higher 5-year overall survival and 5-year disease-free survival rates （P=0.046 and 0.021, respectively） than patients who only received postoperative chemotherapy. However, the difference in these rates between patients who received only intra-operative systemic chemotherapy and patients who only received curative surgery was not statistically significant （P=0.150 and 0.170, respectively）. Multivariate analyses showed that intra-operative systemic chemotherapy was a favorable prognostic factor for the overall survival and disease-free survival rates （P =0.048 and 0.023, respectively）. No grade 4 toxicities related to intra-operative systemic chemotherapy were reco

关键词： stomach neoplasms chemotherapy gastrectomy survival rate

Interleukin-1 beta induction of neuron apoptosis depends on p38 mitogen-activated protein kinase activity after spinal cord injury~1

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Acta Pharmacologica Sinica 2005年第8期26卷 934-942页

作者： Xin-jia WANG~2, kang-mei KONG, wei-li QI, wei-lian YE, Pei-song SONG Department of Spine Surgery, The Second Affiliated Hospital, Shantou University Medical College, Shantou 515041, China DepartmentofSpineSurgery TheSecondAffiliatedHospitalShantouUniversityMedicalCollegeShantou515041China

Aim: Interleukin-1 beta (IL-1β) has been implicated as an extracellular signal in the initiation of apoptosis in neurons and oligodendrocytes after spinal cord injury (SCI). To further characterize the apoptotic cascade initiated by IL- 1β after SCI, we examined the expression of IL-1β, p38 mitogen-activated protein kinase (p38 MAPK) and caspase-3 after SCI, and further investigated whether p38 MAPK was involved in neuron apoptosis induced by IL- 1β. Methods: Adult rats were given contusion SCI at the T-10 vertebrae level with a weight-drop impactor (10 g weight dropped 25.0 mm). The expression levels of IL-1β, p38 MAPK and caspase-3 after SCI were assessed with Western blots, immunohistochemistry staining, and real time reverse transcription polymerase chain reactions (RT-PCR). Neuron apoptosis was assessed with the terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate-biotin nick end labeling (TUNEL) method. Results: Increased levels of IL-1β and p38 MAPK were observed soon after injury, with a peak in expression levels within 6 h of injury. By 24 h after injury, caspase-3 expression was markedly increased in the injured spinal cord. TUNEL-positive cells were first observed in the lesioned area 6 h after SCI. The largest number of TUNEL-positive cells was observed at 24 h post-SCI. Intrathecal injection of the IL-1 receptor antagonist IL- 1Ra significantly reduced expression of p38 MAPK and caspase-3, and reduced the number of TUNEL-positive cells. Moreover, intrathecal injection of an inhibitor of p38 MAPK, SB203580, also significantly reduced the expression of caspase-3, and reduced the number of TUNEL-positive cells in the injured spinal cord. Conclusion: The p38MAPK signaling pathway plays an important role in IL-1β mediated induction of neuron apoptosis following SCI in rats.

关键词： apoptosis interleukin-1 interleukin-1-receptor antagonist protein p38 mitogen-activated protein kinase spinal cord injury TUNEL

铁路网络列车运行调整的优化模型及其分支定价算法

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交通运输系统工程与信息 2018年第1期18卷 179-185页

作者：兰泽康何世伟黎浩东北京交通大学城市交通复杂系统理论与技术教育部重点实验室北京100044

研究了铁路网络中列车可变更运行线路下的列车运行调整问题,目标是使得所有列车偏离终到时间之和最小化.首先引入流平衡约束建立基于列车到发时刻的网络流模型,采用商业软件GUROBI求解.同时构建了基于列车时空路径的整数规划模型,并给... 详细信息

研究了铁路网络中列车可变更运行线路下的列车运行调整问题,目标是使得所有列车偏离终到时间之和最小化.首先引入流平衡约束建立基于列车到发时刻的网络流模型,采用商业软件GUROBI求解.同时构建了基于列车时空路径的整数规划模型,并给出了分支定价算法,采用伪费用分支和最佳优先搜索策略加快算法的收敛.最后设计算例进行验证,通过与GUROBI对比说明本文算法是有效的.当列车数为20列时,求解时间减少91.6%,得到的最终可行解距离最优解的间隔为9.72%.验证了本文分支策略较最为分数分支策略更优,列车运行调整可变更线路相比于只能按原始线路行驶平均可降低目标函数值37.4%.

关键词：铁路运输列车运行调整分支定价算法铁路网络整数规划

Porous Organic Cage‑Based Quasi‑Solid‑State Electrolyte with Cavity‑Induced Anion‑Trapping Effect for Long‑life lithium Metal Batteries

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Nano-Micro Letters 2025年第2期17卷 376-386页

作者： wei-Min Qin Zhongliang li Wen‑Xia Su Jia‑Min Hu Hanqin Zou Zhixuan Wu Zhiqin Ruan Yue‑Peng Cai kang li Qifeng Zheng School of Chemistry South China Normal UniversityGuangzhou 510006People’s Republic of China Key Laboratory of Functional Metal‑Organic Compounds of Hunan Province College of Chemistry and Material ScienceHengyang Normal UniversityHengyang 421008People’s Republic of China Guangzhou Key Laboratory of Energy Conversion and Energy Storage Materials Guangzhou 510006People’s Republic of China

Porous organic cages(POCs)with permanent porosity and excellent host–guest property hold great potentials in regulating ion transport behavior,yet their feasibility as solid-state electrolytes has never been testified in a practical ***,we design and fabricate a quasi-solid-state electrolyte(QSSE)based on a POC to enable the stable operation of li-metal batteries(LMBs).Benefiting from the ordered channels and cavity-induced anion-trapping effect of POC,the resulting POC-based QSSE exhibits a high li+transference number of 0.67 and a high ionic conductivity of 1.25×10^(−4) S cm^(−1) with a low activation energy of 0.17 *** allow for homogeneous li deposition and highly reversible li plating/stripping for over 2000 *** a proof of concept,the LMB assembled with POC-based QSSE demonstrates extremely stable cycling performance with 85%capacity retention after 1000 ***,our work demonstrates the practical applicability of POC as SSEs for LMBs and could be extended to other energy-storage systems,such as Na and K batteries.

关键词： Porous organic cage Cavity-induced anion-trapping Quasi-solid-state electrolyte Homogeneous li+flux lithium metal battery

Online scheduling of two type parallel jobs on identical machines

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Journal of Shanghai University(English Edition) 2010年第6期14卷 396-399页

作者：郭首玮康丽英 Department of Mathematics College of SciencesShanghai University

In this paper we consider an online scheduling of parallel jobs with preemption on identical machines, where jobs arrive over time. The objective is to minimize the makespan. For the problem that jobs have only two po... 详细信息

关键词： scheduling parallel jobs preemption online algorithm competitive analysis

中国杭州夏季相对湿度对难溶性的亚微米级气溶胶演化的影响（英文）

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2018年第1期19卷 45-59页

作者： ling-hong CHEN Biao LV Xian-jue ZHENG kang-wei li Jian-dong SHEN Kai-ji BAO Xue-cheng WU Cheng-hang ZHENG Fang YING Xiang GAO Ke-fa CEN State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 China Hangzhou Environmental Monitoring Center Station Hangzhou 310007 China

目的:研究湿度对气溶胶的影响。创新点:首次研究气溶胶中铵盐的存在形式,为研究相对湿度对大气中气溶胶的影响做了补充。方法:1.利用高分辨飞行时间气溶胶质谱仪采集的外场数据分析各组分时序浓度和粒径分布,并通过正矩阵因数分解模型... 详细信息

目的:研究湿度对气溶胶的影响。创新点:首次研究气溶胶中铵盐的存在形式,为研究相对湿度对大气中气溶胶的影响做了补充。方法:1.利用高分辨飞行时间气溶胶质谱仪采集的外场数据分析各组分时序浓度和粒径分布,并通过正矩阵因数分解模型进行来源解析。2.通过研究各种物质和解析的因子随湿度的变化,探讨湿度对气溶胶演化的影响。3.通过相关性处理探究铵在气溶胶中的存在形式。结论:在相对湿度大于60%时,湿祛除效应对有机物中的二次有机气溶胶及硫酸盐的影响较大,而硝酸盐受液相反应生成作用影响更大。湿度从低到高时,气溶胶中铵的存在形式由硫酸铵向硝酸铵过渡。

关键词：相对湿度气溶胶组成粒径分布湿法去除液相反应