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Side-Chain Type Ferrocene Macrocycles

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Precision Chemistry 2024年第4期2卷 143-150页

作者： Bin Lan Jindong Xu lingyun Zhu Xinyu Chen Hideya Kono Peihan Wang Xin Zuo Jianfeng Yan Akiko Yagi Yongshen Zheng Songhua Chen Yaofeng yuan Kenichiro Itami yuanming li Key Laboratory of Molecule Synthesis and Function Discovery(Fujian Province University) College of ChemistryFuzhou UniversityFuzhou 350108China Institute of Transformative Bio-Molecules(WPI-ITbM) Nagoya UniversityNagoya 464-8602Japan School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjin 300350China Institute of Transformative Bio-Molecules(WPIITbM) Nagoya UniversityNagoya 464-8602Japan College of Chemistry and Material Science Longyan UniversityLongyan 364012China

A class of side-chain type ferrocene macrocycles with a radially conjugated system is introduced in this *** stereo configurations of these ferrocene rings were determined through single-crystal X-ray diffraction ***,in the solid state,the ferrocene rings exhibit a distinctive herringbone stacking pattern imposed by a ferrocene-to-ring host−guest *** UV−vis absorption spectroscopy,electrochemical measurements,and theoretical calculations,valuable insights into the electronic properties of these rings were *** addition,the single crystal of macrocycle A_(2)B demonstrates a second-order nonlinear optical *** a class of organometallic nanorings,this work holds great potential for further exploration in the fields of organometallic chemistry,molecular electronics,and host−guest chemistry.

关键词： Ferrocene Conjugated Macrocycles Organometallic Macrocycles Second-Order Nonlinear Optical Nanoring

Hole-Doped Nonvolatile and Electrically Controllable Magnetism in van der Waals Ferroelectric Heterostructures

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Chinese Physics Letters 2024年第5期41卷 107-119页

作者：姜新新王智宽李冲孙雪莲杨磊李冬梅崔彬刘德胜 School of Physics National Demonstration Center for Experimental Physics EducationShandong UniversityJinan 250100China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China

Electrical control of magnetism in van der Waals semiconductors is a promising step towards development of two-dimensional spintronic devices with ultralow power consumption for processing and storing ***, we propose a design for two-dimensional van der Waals heterostructures(vdWHs) that can host ferroelectricity and ferromagnetism simultaneously under hole doping. By contacting an In Se monolayer and forming an InSe/In_(2)Se_(3) vd WH, the switchable built-in electric field from the reversible out-of-plane polarization enables robust control of the band alignment. Furthermore, switching between the two ferroelectric states(P_↑ and P_↓)of hole-doped In_(2)Se_(3) with an external electric field can interchange the ON and OFF states of the nonvolatile magnetism. More interestingly, doping concentration and strain can effectively tune the magnetic moment and polarization energy. Therefore, this provides a platform for realizing multiferroics in ferroelectric heterostructures,showing great potential for use in nonvolatile memories and ferroelectric field-effect transistors.

关键词： polarization ferroelectric doping

Disitamab vedotin combined with apatinib in gastric cancer: A case report and review of literature

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World Journal of Clinical Oncology 2024年第10期15卷 1351-1358页

作者： Xiao-Qian li Jing Yang Bo liu Shu-Mei Han Department of Medical Oncology Shandong Cancer Hospital and InstituteShandong First Medical University and Shandong Academy of Medical SciencesJinan 510000Shandong ProvinceChina

BACKGROUND In patients with human epidermal growth factor receptor 2(HER2)-overex-pressing gastric cancer(GC),the combination of HER2 targeting and a standard first-line chemotherapy regimen has been demonstrated to significantly improve their ***,in a proportion of patients,cancer progresses within a short period of time,and there is currently no standard treatment after disease *** SUMMARY This study presents a case of a 51-year-old male with advanced GC who un-derwent radical resection(Billroth type II subtotal gastrectomy and gastrojejun-ostomy)and resection of liver *** staining revealed a HER2 score of 2+,a dMMR status,and a Ki67 proliferation index of 30%to 40%.The gene test results indicated the presence of ERBB2 amplification and a PD-L1 expression level of less than 5%.Since December 2021,the patient has experienced disease progression during both first-line(two cycles of KN026 combined with KN046)and second-line(five cycles of nivolumab combined with trastuzumab and SOX chemotherapy)treatment *** patient's prognosis following the first and second lines of treatment was unfavorable,with pro-gression occurring in a relatively short *** third-line therapy,disitamab vedotin(RC48)plus apatinib was *** the time of this report,the patient had achieved a progression-free survival(PFS)of 25.8 months,which exceeded the median survival time for patients with advanced *** Despite the unfavorable prognosis associated with advanced GC,the imple-mentation of personalized treatment approaches may still prove beneficial for select *** patients with HER2-positive GC with extensive metastatic involvement,the use of the HER2-targeted combination with apatinib has demonstrated the potential to prolong both PFS and overall survival.

关键词： Human epidermal growth factor receptor 2-positive gastric cancer RC48 Apatinib Combination therapy Progression-free survival Case report

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“磁法勘探”课程教学探索与实践

中国地质教育 2017年第2期26卷 48-51页

作者：杨宇山李媛媛刘天佑中国地质大学(武汉)地球物理与空间信息学院湖北武汉430074

"磁法勘探"是勘查技术与工程专业本科生专业主干课之一,实践性强,应用广泛。本文基于课堂教学实践的探索与研究,在多媒体教学的基础上引入3D可视化数值模拟技术,实现实时动态可视化教学。在教学过程中结合科研项目系统讲解基础理论,并... 详细信息

"磁法勘探"是勘查技术与工程专业本科生专业主干课之一,实践性强,应用广泛。本文基于课堂教学实践的探索与研究,在多媒体教学的基础上引入3D可视化数值模拟技术,实现实时动态可视化教学。在教学过程中结合科研项目系统讲解基础理论,并在课程考核中加强自主科研实践的训练和评价,及时引导学生进行课程结束后的分析与反思,从多方面进行教学手段和方法的革新,增强教学效果,增进学生的学习兴趣,提高学生学以致用的能力,培养学生独立探索的科学精神。

关键词：磁法勘探课程教学 3D可视化教学科研训练

雨滴谱数据在S波段双偏振天气雷达数据质量评估中的应用

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气象 2024年第2期50卷 210-220页

作者：李力徐芬刘希陈刚南京市气象局南京210019 南京气象科技创新研究院南京210019 中国气象局交通气象重点开放实验室南京210019提要:

结合T-Matrix方法和雨滴谱仪数据反演双偏振参量,设计了一种雨滴谱反演评估方法(雨滴谱法),利用其反演结果可对双偏振天气雷达数据进行评估。将此方法应用于不同类型降水过程的雷达偏振参量数据质量评估,结果表明:满足微雨条件时,雨滴... 详细信息

结合T-Matrix方法和雨滴谱仪数据反演双偏振参量,设计了一种雨滴谱反演评估方法(雨滴谱法),利用其反演结果可对双偏振天气雷达数据进行评估。将此方法应用于不同类型降水过程的雷达偏振参量数据质量评估,结果表明:满足微雨条件时,雨滴谱法与传统的微雨滴法均能有效监测由雷达系统误差导致的观测偏差,且评估结果十分接近;不满足微雨条件时,雨滴谱法评估的不同类型降水过程的雷达数据质量与满足微雨条件下的评估结果十分接近,客观证明了系统调整后雷达运行良好、数据质量稳定;不同雨强(R)情况下,雨滴谱法的评估结果具有一致性。10 mm·h^(-1)≤R<20 mm·h^(-1)时,雷达观测的数据质量最为稳定。该雨滴谱法适用范围广,可动态评估双偏振雷达偏振参量质量,有助于雷达调整和数据校正。

关键词：雨滴谱双偏振天气雷达质量评估差分反射率因子

Market Positioning Analysis of CJ Brand Fitness Equipment

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Proceedings of Business and Economic Studies 2024年第2期7卷 89-94页

作者： Bohan liu Yuying li Ping Yu Jiayue Zhou Kang Fang Department of Finance and Economics Shandong University of Science and TechnologyJinan 250031Shandong ProvinceChina

CJ Health Technology *** been an export-oriented supplier of fitness equipment,boasting leading technology innovation and manufacturing ***,in the process of expanding into the domestic market,the challenges of unclear market positioning and lack of brand awareness have emerged as major *** address these issues,a SWOT analysis was conducted to explore a suitable market positioning strategy for the CJ *** analysis reveals that the market demand for commercial fitness equipment is relatively saturated,with fierce *** contrast,the home fitness market represents a new blue ocean with promising development opportunities for the CJ *** excellent product quality,stringent quality control measures,and innovation-driven cutting-edge technology,it is recommended that CJ brand fitness equipment target young customers aged between 25 and 35 years ***,vigorously developing the home fitness product line is proposed to capitalize on this burgeoning market segment.

关键词： Fitness equipment Brand planning Market positioning SWOT

Risk factors and risk prediction model for mucocutaneous separation in enterostomy patients:A single center experience

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World Journal of Clinical Cases 2024年第33期12卷 6620-6628页

作者： Yun liu Hong li Jin-Jing Wu Jian-Hong Ye Department of Reconstructive Hand and Plastic SurgeryZhejiang Chinese Medical UniversityLishui Central Hospital289 Kuocang RoadLiandu DistrictLishui 323000Zhejiang ProvinceChina Department of Operation Room Zhejiang Chinese Medical UniversityLishui Central Hospital289 Kuocang RoadLiandu DistrictLishui 323000Zhejiang ProvinceChina

BACKGROUND Mucocutaneous separation(MCS)is a common postoperative complication in enterostomy patients,potentially leading to significant *** identification of risk factors is crucial for preventing this ***,predictive models for MCS remain *** To construct a risk prediction model for MCS in enterostomy patients and assess its clinical predictive *** A total of 492 patients who underwent enterostomy from January 2019 to March 2023 were included in the *** were divided into two groups,the MCS group(n=110),and the non-MCS(n=382)based on the occurrence of MCS within the first 3 weeks after *** and multivariate analyses were used to identify the independent predictive factors of MCS and the model *** operating characteristic curve analysis was used to assess the model’s *** The postoperative MCS incidence rate was 22.4%.Suture dislodgement(Plinical utility on decision curve *** The mucocutaneous separation prediction model constructed in this study has good predictive performance and can provide a reference for early warning of mu

关键词： Enterostomy Mucocutaneous separation Risk assessment model Performance validation

NaNO_2和NH_4Cl酸催化反应动力学研究

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内蒙古石油化工 2008年第1期34卷 15-17页

作者：袁红安谢志海李源鎏胡怀明西北大学化学系陕西西安710069 延长油田股份有限公司横山采油厂陕西榆林719100

在NaNO2和NH4Cl混合液中分别加入0.5%(v/v)的硫酸、硝酸、磷酸、醋酸、盐酸,在恒压下测定体系温度随时间的变化,在恒容条件下测定体系压力和时间的关系。根据实验数据绘制出,在几种液体酸催化下,体系温度和时间的关系曲线,计算得到了几... 详细信息

在NaNO2和NH4Cl混合液中分别加入0.5%(v/v)的硫酸、硝酸、磷酸、醋酸、盐酸,在恒压下测定体系温度随时间的变化,在恒容条件下测定体系压力和时间的关系。根据实验数据绘制出,在几种液体酸催化下,体系温度和时间的关系曲线,计算得到了几种酸催化反应体系的表观活化能和速率常数表达式。发现(1)体系的酸催化反应速度和酸强度有关。(2)酸催化能加速NaNO2和NH4Cl热化学反应的速率,是由于H+的加入,降低了体系的活化能。

关键词：热化学解堵酸催化活化能反应速率亚硝酸钠氯化铵

Research on fault time prediction method for high speed rail BTM unit based on multi method interactive validation

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High-speed Railway 2024年第03期 164-171页

作者： limin Fu Junqiang Gou Chao Sun Hanrui li Wei liu School of Information Science and Technology Southwest Jiaotong University China Railway Signal and Communication Research and Design Institute Group Co Ltd.

The Balise Transmission Module(BTM) unit of the on-board train control system is a crucial component. Due to its unique installation position and complex environment, this unit has a higher fault rate within the on-board train control system. To conduct fault prediction for the BTM unit based on actual fault data, this study proposes a prediction method combining reliability statistics and machine learning, and achieves the fusion of prediction results from different dimensions through multi-method interactive validation. Firstly, a method for predicting equipment fault time targeting batch equipment is introduced. This method utilizes reliability statistics to construct a model of the remaining faultless operating time distribution considering uncertainty, thereby predicting the remaining faultless operating probability of the BTM unit. Secondly, considering the complexity of the BTM unit's fault mechanism, the small sample size of fault cases, and the potential presence of multiple fault features in fault text records, an individual-oriented fault prediction method based on Bayesian-optimized Gradient Boosting Regression Tree(Bayes-GBRT) is proposed. This method achieves better prediction results compared to linear regression algorithms and random forest regression algorithms, with an average absolute error of only 0.224 years for predicting the fault time of this type of equipment. Finally, a multi-method interactive validation approach is proposed, enabling the fusion and validation of multi-dimensional results. The results indicate that the predicted fault time and the actual fault time conform to a log-normal distribution, and the parameter estimation results are basically consistent, verifying the accuracy and effectiveness of the prediction results. The above research findings can provide technical support for the maintenance and modification of BTM units, effectively reducing maintenance costs and ensuring the safe operation of high-speed railway, thus havi

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