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绝经前后T_1期乳腺癌患者临床特征的分析

中国癌症杂志 2005年第1期15卷 67-69页

作者：李南林张震王岭第四军医大学西京医院血管外科陕西西安710032 安徽中医学院第二附属医院普外科安徽合肥230061

　　　目的:分析T1期(肿瘤直径<2cm)原发性乳腺癌女性患者绝经前后在肿瘤大小、病理分类、淋巴结转移率和数目。方法:常规病理检验以及应用免疫组化、HE法分别测定绝经前乳腺癌患者和绝经后乳腺癌患者者的ER、PR。结果:两组患者在肿瘤... 详细信息

　　　目的:分析T1期(肿瘤直径<2cm)原发性乳腺癌女性患者绝经前后在肿瘤大小、病理分类、淋巴结转移率和数目。方法:常规病理检验以及应用免疫组化、HE法分别测定绝经前乳腺癌患者和绝经后乳腺癌患者者的ER、PR。结果:两组患者在肿瘤大小上无明显差异,但绝经前乳腺癌患者浸润导管癌的百分比为 84. 7%,绝经后乳腺癌患者的浸润导管癌百分比为 62. 2%,经χ2 检验,P<0. 01。两组淋巴结转移率分别为 39. 3%和 25. 5%,经χ2 检验,P<0. 01。两组ER和PR阳性伴淋巴结转移的比例经χ2 检验,P<0. 05。结论:绝经前乳腺癌患者和绝经后乳腺癌患者在病理分类、淋巴结转移率及数目、ER、PR阳性伴淋巴结转移上有显著性差异。对于T1原发性乳腺癌患者不论有无淋巴结转移,均应行癌肿切除伴Ⅰ、Ⅱ级淋巴结清扫。

关键词：乳腺癌淋巴结转移雌激素受体(ER) 孕激素受体(PR) 临床特征

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石菖蒲中乙酰胆碱酯酶抑制剂的筛选

中成药 2022年第3期44卷 836-841页

作者：方洪韩沅沅谷丽华李林楠杨莉吴其国王峥涛上海中医药大学中药研究所中药标准化教育部重点实验室国家中医药管理局中药新资源与质量评价重点实验室上海201203 上海中药标准化研究中心上海201203

目的从石菖蒲中筛选天然乙酰胆碱酯酶(AChE)抑制剂。方法采用高效薄层色谱(HPTLC)-生物自显影,筛选石菖蒲提取物和固相萃取小柱分段部位的乙酰胆碱酯酶抑制斑点并定位,采用薄层色谱-质谱(TLC-MS)分析薄层板上的目标物并获取分子量和碎... 详细信息

目的从石菖蒲中筛选天然乙酰胆碱酯酶(AChE)抑制剂。方法采用高效薄层色谱(HPTLC)-生物自显影,筛选石菖蒲提取物和固相萃取小柱分段部位的乙酰胆碱酯酶抑制斑点并定位,采用薄层色谱-质谱(TLC-MS)分析薄层板上的目标物并获取分子量和碎片信息,结合文献数据鉴定化合物,并采用分子对接技术测算化合物与AChE蛋白的亲和力以及结合方式,验证其活性。结果从石菖蒲提取物中共发现5个活性斑点,薄层色谱-质谱鉴定出4个斑点可能为β-细辛醚(与α-细辛醚斑点重合)、亚油酸、菖蒲螺酮烯和桔利酮,其中β-细辛醚、α-细辛醚和亚油酸与对照品对照得到验证。分子对接结果显示,5个化合物与AChE分子具有较好的结合能力,可能是通过TRP86、TRP337和PHE338等氨基酸与乙酰胆碱酯酶产生氢键作用或疏水作用。结论菖蒲螺酮烯、桔利酮、β-细辛醚、α-细辛醚和亚油酸为石菖蒲中主要乙酰胆碱酯酶抑制活性成分。

关键词：石菖蒲乙酰胆碱酯酶抑制剂高效薄层色谱-生物自显影薄层色谱-质谱分子对接

Printing perovskite and graphene parallel structure-based optical-mechanical sensors for human-machine interaction

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Science China Technological Sciences 2025年

作者： Sisi CHEN Jiemin ZHANG nan CHENG Wenbo li Jing liU Hongfei XIE Jie ZHANG Yueying CHENG Xiaotong ZHAO Meng SU Yanlin SONG Key Laboratory of Green Printing CAS Research/Education Center for Excellence in Molecular Sciences Institute of ChemistryChinese Academy of Sciences (ICCAS) University of Chinese Academy of Sciences Weiyang College Tsinghua University Department of Cardiovascular Surgery First Medical Center PLA General Hospital AECC Beijing Institute of Aeronautical Materials Beijing Institute of Graphene Technology Beijing Engineering Research Centre of Graphene Application School of Integrated Circuit & Beijing National Research Center for Information Science and Technology (BNRist) Tsinghua University

Surgical robots are designed to provide enhanced precision and dexterity compared to manual surgical procedures,which mainly rely on multimodal sensing technologies for the surgeon to seamlessly operate the robotic arms and *** with single-mode sensors, optical and mechanical bi-modal sensors provide improved precision, enhanced safety,and robustness of human-machine interaction systems. Here, the template-guided and pneumatic printing technologies are combined to construct perovskite and graphene parallel structures with both optical and mechanical sensing capabilities. The printed uniformly crystallized perovskite microstructure exhibits fast and sensitive photoelectric response characteristics,enabling shadow recognition functionality. The combination of graphene and elastic rubber endows the great printability to prepare parallel structures near the perovskite arrays for force sensing capabilities. Thus, the printed perovskite and graphene structures possess non-contact optical sensing capabilities to detect hand position by recognizing shadows between the hand and the sensor, as well as contact mechanical sensing capabilities to detect touch force applied by the hand. It provides a synergistic platform for real-time and multidimensional feedback to improve human-machine interaction.

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Z变换法改进PML-FDTD吸收边界条件

微波学报 2010年第S2期26卷 36-39页

作者：杨晓冬白玉冯琳琳李智楠哈尔滨工程大学信息与通信工程学院哈尔滨150001

时域有限差分(FDTD)方法是计算时域电磁散射和辐射的一种简单有效的方法,被广泛应用于求解电磁场问题中,但由于计算机容量的限制,FDTD计算只能在有限区域进行,为了能模拟开域电磁过程,在计算区域的截断边界处必须给出吸收边界条件,完全... 详细信息

时域有限差分(FDTD)方法是计算时域电磁散射和辐射的一种简单有效的方法,被广泛应用于求解电磁场问题中,但由于计算机容量的限制,FDTD计算只能在有限区域进行,为了能模拟开域电磁过程,在计算区域的截断边界处必须给出吸收边界条件,完全匹配层(PML)是一种行之有效的吸收边界条件。在PML中应用Z变换,和传统的引入PML的方法相比,得到的迭代公式的程序更方便、更简单;考虑到要模拟的FDTD计算区域的虚拟物质属性,采用了特殊的处理方法;数值实验验证了这种方法的有效性和吸收边界的吸收效果。

关键词：时域有限差分法(FDTD) 完全匹配层(PML) Z变换

Interpretable Machine Learning Method for Compressive Strength Prediction and Analysis of Pure Fly Ash-based Geopolymer Concrete

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 65-78页

作者： SHI Yuqiong li Jingyi ZHANG Yang li li Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education Northwest A&F Uni-versityYangling 712100China College of Water Resources and Architectural Engineering Northwest A&F UniversityYangling 712100China Chongqing Key Laboratory of Public Big Data Security Technology Chongqing 401420China Chongqing College of Mobile Communication Chongqing 401520China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina National Rail Transit Electrification and Automation Engineering Technology Research Center(Hong Kong Branch) The Hong Kong Polytechnic UniversityKowloonHung HomHong KongChina

In order to study the characteristics of pure fly ash-based geopolymer concrete(PFGC)conveniently,we used a machine learning method that can quantify the perception of characteristics to predict its compressive *** this study,505 groups of data were collected,and a new database of compressive strength of PFGC was *** order to establish an accurate prediction model of compressive strength,five different types of machine learning networks were used for comparative *** five machine learning models all showed good compressive strength prediction performance on *** them,R2,MSE,RMSE and MAE of decision tree model(DT)are 0.99,1.58,1.25,and 0.25,*** R2,MSE,RMSE and MAE of random forest model(RF)are 0.97,5.17,2.27 and 1.38,*** two models have high prediction accuracy and outstanding generalization *** order to enhance the interpretability of model decision-making,we used importance ranking to obtain the perception of machine learning model to 13 *** 13 variables include chemical composition of fly ash(SiO_(2)/Al_(2)O_(3),Si/Al),the ratio of alkaline liquid to the binder,curing temperature,curing durations inside oven,fly ash dosage,fine aggregate dosage,coarse aggregate dosage,extra water dosage and sodium hydroxide *** temperature,specimen ages and curing durations inside oven have the greatest influence on the prediction results,indicating that curing conditions have more prominent influence on the compressive strength of PFGC than ordinary Portland cement *** importance of curing conditions of PFGC even exceeds that of the concrete mix proportion,due to the low reactivity of pure fly ash.

关键词： machine learning pure fly ash geopolymer compressive strength feature perception

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嵌件注射成型工艺的分析与优化

塑料工业 2012年第3期40卷 84-87页

作者：李林楠杨音文李庆佟玉斌黄志高周华民华中科技大学材料成形与模具技术国家重点实验室湖北武汉430074 武汉美嘉机械塑料有限公司湖北武汉430065 烟台职业学院机械工程系山东烟台264670

以某品牌轿车车身B柱外饰件为例,分析了嵌件注射成型工艺中熔合纹和翘曲缺陷产生的原因;并通过数值模拟和实验对比,提出了预测和修正制品缺陷的思路和方法。

关键词：嵌件注射熔合纹翘曲 CAE

基于“性状-化学成分”关联性分析的三七质量评价新策略

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药学学报 2024年第8期59卷 2326-2336页

作者：王子樱范文翔刘龙婵陆美龙谷丽华李林楠杨莉王峥涛上海中医药大学中药研究所中药标准化教育部重点实验室国家中医药管理局中药新资源与质量评价重点实验室上海201203 上海中药标准化研究中心上海201203

传统的中药材商品规格主要依据性状等感官指标划分为不同的等级,作为优质优价的依据,与现行标准是否吻合、是否能够反映药材的内在质量,尚缺乏系统评价。三七为常用、大宗药材,目前市场上仅根据头数(支数/500 g)划分为8个等级,但与《中... 详细信息

传统的中药材商品规格主要依据性状等感官指标划分为不同的等级,作为优质优价的依据,与现行标准是否吻合、是否能够反映药材的内在质量,尚缺乏系统评价。三七为常用、大宗药材,目前市场上仅根据头数(支数/500 g)划分为8个等级,但与《中华人民共和国药典》规定的以三七总皂苷(3种皂苷之和)含量为指标的标准不相关。本研究采用超高效液相色谱-四级杆-飞行时间串联质谱(UPLC-Q-TOF-MS/MS)并结合质谱分子网络对不同头数三七皂苷类成分进行快速鉴定,共表征64种皂苷成分。通过正交偏最小二乘判别分析(OPLS-DA)筛选出与三七头数相关的17个皂苷差异化合物;采用高效液相色谱法(HPLC)对不同头数三七中5种主要皂苷类成分R_(1)、Rb_(1)、Rg_(1)、Rd、Re进行含量测定,相关性分析结果表明Rd、R_(1)是差异皂苷中VIP值最大的皂苷类成分,与三七头数呈显著负相关(P0.08)为指数,可将三七划分为20~60头(优选)与80~200头(统货)两个等级。本研究基于“性状-化学分析”相结合的理念,整合非靶向定性分析与定量测定方法,为三七品质评价提供新的科学依据和策略。

关键词：三七等级品质评价高分辨质谱法皂苷

Mainchain conformation ordering self-assembly tailored room temperature phosphorescence emission

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Science China Chemistry 2025年第01期 329-336页

作者： Yuzhu li Yumeng Gao Feng Tian Yu Wang Yuan Yao Shaoliang lin Xiang Ma Binbin Xu Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Key Laboratory for Advance Materials and Feringa Noble Prize Scientist Joint Research Centre Frontiers Science for Materiobiology and Dynamic Chemistry School of Chemistry and Molecular Engineering East China University of Science & Technology

Developing organic room-temperature phosphorescence （RTP） materials with a wide range of tunable-emission is significant in expanding the applications of RTP ***,we rationally designed amphiphilic alternating copolymers poly(1,2-bis（4-alkoxyphenyl）ethane-1,2-dione-alt-（ethylene glycol）x)(P（Bz-alt-EGx）) that combined the advantage of alternating benzil and EGxskeleton,and tunable mainchain *** a mainchain conformation ordering assembly （COA） process,P（Bz-alt-EGx） self-assembled into well-defined platelets,and such assemblies emitted blue RTP at ca.425 nm due to the ordered folded-chain conformation and confined *** contrast,traditional self-assembly （TA） of P（Bz-alt-EGx） obtained less ordered aggregates,such as asymmetric worms,vesicles,and rod-like *** resultant less ordered aggregates exhibited yellow-green RTP at ca.550 *** wide-tuning RTP emission in solution （between blue and yellow-green,over125 nm） is realized using the P（Bz-alt-EGx） alternating copolymers under the treatment of different self-assembly *** study uncovers a new strategy to tailor the RTP emission through different self-assembly pathways and holds great promise for the fabrication of advanced optical materials.

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Thermally triggered topological polymerization in diacetylene-functionalized covalent organic framework toward enhanced memristive properties

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Science China Chemistry 2025年

作者： Panke Zhou Yuxing Huang Ziyue Yu Cong Zhang Qian Chen Yiping li Chao lin Xiong Chen State Key Laboratory of Photocatalysis on Energy and Environment Key Laboratory of Advanced Carbon-Based Functional MaterialsCollege of Chemistry Fuzhou University

The development of stimuli-responsive switching memory devices and the elucidation of their switching mechanisms in specific environments are crucial for advancing the field of molecular electronics. Herein, we propose two distinct two-dimensional covalent organic frameworks (COFs), namely Py-EDA and Py-BDA, incorporating acetylene (-C≡C-) or diacetylene(-C≡C-C≡C-) moieties, respectively, targeting fabricate memory devices exhibiting stimuli-responsive switching *** findings demonstrate that the incorporation of acetylene units effectively modulates the electronic band structure and enhances the degree ofπ-conjugation, resulting in devices that exhibit typical bipolar nonvolatile memory performance. Notably,upon thermal treatment, the memory behavior of the ITO/Py-BDA/Ag device transitions to a write-once-read-many-times(WORM) mode, displaying decreased SET voltage, increased ON/OFF current ratio, and remarkable retention reliability and cycle stability. This switching behavior is attributed to the occurrence of interlayer solid-state topological polymerization at 350℃, leading to the transformation of diacetylene columnar arrays into enyne chains within Py-BDA, thereby further promoting interlayer charge transfer and separation.

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