检索结果-南通市图书馆

Chinese Chemical Letters 2003年第5期14卷 495-498页

作者： li rong lin Zhao li Wen liang YANG Hong CHEN Yun Bao JIANG Department of Chemistry and the MOE Key Laboratory of Analytical Sciences Xiamen UniversityXiamen 361005

The intramolecular charge transfer dual fluorescence of p-dibutylaminobenzoic acid-b-cyclodextrin inclusion complex showed a substantially higher sensitivity toward aqueous solution pH variation when compared with that of p-dibutylaminobenzoic acid alone, which established a new principle for direct CT fluorescence sensing in aqueous solution by using the CT fluorophore-cyclodextrin inclusion complex.

关键词： pH sensing dual fluorescence intramolecular charge transfer cyclodextrin inclusion complex p-dibutylaminobenzoic acid.

Prediction and Analysis on Oxidation of H13 Hot Work Steel

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2006年第1期13卷 44-49页

作者： MIN Yong-an WU Xiao-chun WANG rong li lin XU Luo-ping School of Materials Science and Engineering Shanghai University Shanghai 200072 China

The understanding of oxidation behaviors on H13 steel was helpful to improve the service life and performance of hot work moulds and dies. Thermal-Calc Software was performed to calculate the oxidation phases on H13 steel along with different partial oxygen pressures in the interesting temperature range of 500-700 ℃. In this range H13 steel samples were treated respectively in different atmosphere including flowing water vapor （0.2 MPa）, normal pressure air （0.1 MPa） and low pressure air （0. 001 MPa）. The different oxidation films were detected with optical microscopy and X-ray diffraction. The microstructures and phase constitutions of the films formed in low pressure air were similar to those of the films formed in water vapor, and obviously different to those of the films formed in normal pressure air. The oxidation mechanisms of H13 steel in different atmosphere were also discussed.

关键词： oxidatiom hot work steel surface treatment die casting

R-CHOP resistance in diffuse large B-cell lymphoma:biological and molecular mechanisms

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2021年第3期134卷 253-260页

作者： liang Wang lin-rong li Department of Hematology Beijing Tongren HospitalCapital Medical UniversityBeijing 100730China Department of Breast Surgery Peking Union Medical College HospitalBeijing 100730China

Although the first-line rituximab plus cyclophosphamide,doxorubicin,vincristine,and prednisone regimen(R-CHOP)substantially improved outcomes for patients with diffuse large B-cell lymphoma(DLBCL),40%of the patients suffered from relapsed/refractory disease and had poor survival *** detailed mechanism underlying R-CHOP resistance has not been well *** this review,we conducted a thorough search for literature and clinical trials involving DLBCL *** discussed DLBCL biology,epigenetics,and aberrant signaling of the B-cell receptor(BCR),phosphatidylinositol 3-kinase(PI3K)/Akt,nuclear factor kappa light chain enhancer of activated B-cells(NF-κB),and the Janus kinase(JAK)/signal transducer and activator of transcription 3(STAT3)pathways as defining mechanisms of DLBCL heterogeneity and R-CHOP *** cell of origin,double-or triple-hit lymphoma and double-protein-expression,clonal evolution,tumor microenvironment,and multi-drug resistance help to contextualize DLBCL resistance in an(epi)genetically and biologically comparative *** better understanding of the biological and molecular landscape of DLBCL,a more detailed classification system and tailored treatments will ideally become available to further improve the prognosis of DLBCL patients.

关键词： Diffuse large B-cell lymphoma Tumor microenvironment Multi-drug resistance Genetic heterogeneity

Low dose effects on cultured mammalian cells...

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2000年第4期11卷 276-279页

作者： WANG Ju-Fang, li Wen-Jian, ZHOU Guang-Ming, HE Jing, li Qiang, DANG Bing-rong, li Xing-lin, XIE Hong-Mei, WEI Zeng-Quan (Institute of Modern Physics, the Chinese Academy of Sciences, Lanzhou 730000) 中科院近代物理所甘肃兰州 730000

The low dose effects induced by carbon ions on Chinese hamster V79 cells and murine melanoma B16 cells were investigated in this paper. Both cell lines were divided into four groups for irradiation: (1) control, (2) 0.02 Gy or 0.05 Gy(D1), (3) 1 Gy(D2), (4) D1+D2. The survivors and micronuclei were studied as biological endpoints. The results of group (1) and group (2) showed that there were no obvious differences on micronucleus frequency but there were significant increases when irradiation dose was 0.02Gy on colony formation efficiency. Although low dose ion irradiation could not contribute to DNA damages, it could enhance the colony formation efficiency. In the study of group (3) and (4), when the ion dose was 0.02 Gy, there were evident increases on surviving fraction and decreases on micronucleus frequency, but there were no statistical changes on these endpoints when the ion dose was 0.05Gy. This meant that high LET radiation could induce the adaptive response of cultured cells, furthermore, in the range of inducing ion dose , low dose irradiation was more profitable than high dose one.

关键词：哺乳动物细胞 DNA 离子辐射低剂量效应辐射效应碳离子

在线全文

学校读者我要写书评

暂无评论

一种宽带全向圆极化天线

电子学报 2014年第1期42卷 187-190页

作者：全旭林李融林华南理工大学电子与信息学院广东广州510640

基于环天线-偶极子模型,本文提出一种宽带全向圆极化天线.天线包含四对围绕圆柱放置的倾斜振子和一个宽带馈电网络.每对振子包含一个主辐射振子和一个用以增加带宽的寄生振子.馈电网络包括四个宽带巴伦和一个阻抗匹配电路.实验结果表明... 详细信息

基于环天线-偶极子模型,本文提出一种宽带全向圆极化天线.天线包含四对围绕圆柱放置的倾斜振子和一个宽带馈电网络.每对振子包含一个主辐射振子和一个用以增加带宽的寄生振子.馈电网络包括四个宽带巴伦和一个阻抗匹配电路.实验结果表明,该天线15-dB回波损耗带宽和3-dB轴比带宽分别为31%(1.68-2.31GHz)和30%(1.7-2.3GHz),水平面不圆度小于1dB.

关键词：全向天线圆极化天线宽带天线

Laparoscopy-assisted D2 radical distal gastrectomy for advanced gastric cancer： initial experience

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2009年第12期122卷 1404-1407页

作者： DU Xiao-hui li rong CHEN lin SHEN Di li Song-yan GUO Qiang Department of General Surgery General Hospital of PLA Beijing 100853 China

Background Laparoscopy-assisted radical gastrectomy is gaining acceptance for treating early gastric cancer. However, few reports concerning the effectiveness of laparoscopy-assisted D2 radical distal gastrectomy （LADG） for advanced gastric cancer or data comparing the results obtained after open distal gastrectomy （ODG） are yet available. The aim of this study was to evaluate the method, feasibility and clinical result of LADG for advanced gastric cancer. Methods A retrospective study was performed comparing LADG and ODG for advanced gastric cancer. Seventy-eight patients who underwent LADG were compared with 90 patients who underwent ODG in terms of pathologic findings, operative outcome, and complications. Results There was no conversion to open surgery in the LADG group and no postoperative mortality of any patients. There were no significant differences between LADG and ODG in operative time （（245±35） vs （220±620） minutes）, complication rate （7.7% vs 10.0%）, and number of lymph nodes （23.5±6.0 vs 21.0±7.5）, while the blood loss was less after LADG （（110±25） vs （196±30） ml, P 〈0.05）. The time to postoperative flatus and postoperative hospital stay were shorter after LADG （（73.0±8.5） vs （102.0±10.5） hours, and （8.6±1.2） vs （12.1 ±2.5） days, P 〈0.05, respectively）. Conclusion LADG for advanced gastric cancer is feasible, safe, and minimally invasive.

关键词： gastric cancer laparoscopic distal gastrectomy minimally invasive surgery lymph node dissection

在线全文

学校读者我要写书评

暂无评论

基于路由代价的无线传感器网络蚁群路由算法

华南理工大学学报（自然科学版） 2011年第5期39卷 36-43页

作者：陈凤超李融林华南理工大学电子与信息学院广东广州510640

能耗最小化和能耗均衡是无线传感器网络路由算法的两个主要问题.文中从无线传感器网络蚁群路由算法出发,分析了启发式因子的各种构建方式对能耗最小化和能耗均衡的影响,提出了无线传感器网络的路由代价模型,并以此构建启发式因子.对比... 详细信息

能耗最小化和能耗均衡是无线传感器网络路由算法的两个主要问题.文中从无线传感器网络蚁群路由算法出发,分析了启发式因子的各种构建方式对能耗最小化和能耗均衡的影响,提出了无线传感器网络的路由代价模型,并以此构建启发式因子.对比各种构建方式的仿真结果可以看出,使用路由代价构建启发式因子更为合理,该构建方式在网络寿命和均衡性方面都优于其它构建方式.

关键词：无线传感器网络路由算法能耗均衡启发式算法

在线全文

学校读者我要写书评

暂无评论

无线传感器网络单汇聚节点选址策略

系统工程与电子技术 2012年第6期34卷 1246-1251页

作者：陈凤超李融林华南理工大学电子与信息学院广东广州510641

无线传感器网络中,所有节点收集到的数据都通过多跳的方式转发到汇聚节点,因此汇聚节点的选址策略对网络寿命有很大的影响。首先在节点随机分布的无线传感器网络中简单分析了汇聚节点的面向能量选址策略,然后进一步探讨了面向寿命的选... 详细信息

无线传感器网络中,所有节点收集到的数据都通过多跳的方式转发到汇聚节点,因此汇聚节点的选址策略对网络寿命有很大的影响。首先在节点随机分布的无线传感器网络中简单分析了汇聚节点的面向能量选址策略,然后进一步探讨了面向寿命的选址策略,最后结合基于路由代价的蚁群路由算法在无线传感器网络中对两种选址策略进行仿真,仿真结果显示面向寿命选址策略的网络总能耗稍大于面向能量的选址策略,但前者能在较低网络能耗的基础上有效地延长网络寿命。

关键词：无线传感器网络汇聚节点选址蚁群路由网络寿命

敬惜与揖别:鲁迅1924年暑期西行之旅的神思姿态

在线全文

学校读者我要写书评

暂无评论

西北大学学报（哲学社会科学版） 2024年第5期54卷 41-51页

作者：李林荣北京第二外国语学院文化与传播学院北京100024

鲁迅1924年暑期的西行之旅,缘起偶然却又仓促成行,与他当时正陷于兄弟交恶升级、身心备受煎熬、愤懑无从排遣、窘况无力转圜的极端困境,存在若干事端头绪可证的紧密关系。全程往返36天,两度途经河南并歇脚,一次登岸山西且小憩,20天讲学... 详细信息

鲁迅1924年暑期的西行之旅,缘起偶然却又仓促成行,与他当时正陷于兄弟交恶升级、身心备受煎熬、愤懑无从排遣、窘况无力转圜的极端困境,存在若干事端头绪可证的紧密关系。全程往返36天,两度途经河南并歇脚,一次登岸山西且小憩,20天讲学、阅市、观剧、宴游于长安。其行踪匆促,其言动喧哗,既不散淡,更不悠闲,唯因直陈现场见闻、细述当时情状的笔墨辞章的缺失,遂致定格为鲁迅履历中一段节外生枝的小插曲。参照孙伏园《长安道上》刻意而为的同步描述,联系鲁迅本人“忽然想到”式的有关片言只语,抵近1924年及其前后一两年鲁迅猝不及防地踏地雷、跨陷阱的人生剧情现场,再作详察,或许可见:面向执着于诚与爱的血勇之士的敬惜与揖别这一“神思”姿态,不仅贯穿了鲁迅这趟西行之旅的全程,而且在他之后信笔提及长安的字里行间还屡有闪现,在他着力经营的后续小说创作中,更有形象化和主题化的纵深展开。

关键词：鲁迅 1924年西行之旅神思敬惜与揖别

在线全文

学校读者我要写书评

暂无评论

数字化进程中阅读痕迹的实践逻辑与合理想象

编辑之友 2022年第3期 29-34页

作者：黎薇李林容西南政法大学新闻传播学院重庆401120 西南政法大学广播影视与新媒体中心重庆401120

文章对阅读痕迹的概念所指进行考察,从传统的“提要钩玄”到搭载智能设备的书写行为的重生,不仅强调了阅读实践的重要性,更体现了阅读和记录间由剥离到伴随的演变过程。横向比较相关学科对于痕迹概念的界定,有关阅读痕迹的研究应跳出立... 详细信息

文章对阅读痕迹的概念所指进行考察,从传统的“提要钩玄”到搭载智能设备的书写行为的重生,不仅强调了阅读实践的重要性,更体现了阅读和记录间由剥离到伴随的演变过程。横向比较相关学科对于痕迹概念的界定,有关阅读痕迹的研究应跳出立足于文本的固化层面,将其看作反馈流程中的一环,以动态眼光进行考察。由此,文章借助具身理论,认为数字阅读痕迹之所以能够收获庞大的用户群体,其本质在于从个体的自我认知到媒介表演、技术更新和身体控制的双向关系、虚拟空间与现实社会的交互作用三个层面,实现心理、物理、社会的远距离在场。文章借助现象背后的内在逻辑,进一步从媒介补偿、技术补偿、需求补偿三个维度为数字出版产业的智能化发展提供借鉴。

关键词：阅读痕迹数字出版智能化具身理论媒介补偿