检索结果-南通市图书馆

A Quick Calculation Method for Radiation Pattern of Submillimeter Telescope with Deformation and Displacement

Research in Astronomy and Astrophysics 2024年第3期24卷 249-265页

作者： Jia You yi-Wei yao Zheng Wang School of Automation Southeast UniversityNanjing 210096China

Radiation pattern captures the electromagnetic performance of reflector antennas,which is significantly affected by the deformation of the primary reflector due to gravity and the displacement of the secondary *** the design process of large reflector antennas,a substantial amount of time is often dedicated to iteratively adjusting structural parameters and validating electromagnetic *** improve the efficiency of the design process,we first propose an approximate calculation method of optical path difference(OPD)for the deformation of the primary reflector under gravity and the displacement of the secondary *** an OPD fitting function based on the modified Zernike polynomials is proposed to capture the phase difference of radiation over the aperture plane,based on which the radiation pattern will be obtained quickly by the aperture field integration *** experiments demonstrate the effectiveness of the proposed quick calculation method for analyzing the radiation pattern of a 10.4 m submillimeter telescope antenna at its highest operating frequency of 856 *** comparison with the numerical simulation method based on GRASP(which is an antenna electromagnetic analysis tool combining physical optics(PO)and physical theory of diffraction(PTD)),the quick calculation method reduces the time for radiation pattern analysis from more than one hour to less than two ***,the quick calculation method exhibits excellent accuracy for the figure of merit(FOM)of the radiation ***,the proposed quick calculation method can obtain the radiation pattern with high speed and *** to the time-consuming numerical simulation method(PO and PTD),it can be employed for quick analysis of the radiation pattern for the lateral displacement of the secondary reflector and the deformation of the primary reflector under gravity in the design process of a reflector antenna.

关键词： instrumentation high angular resolution-methods data analysis-methods analytical

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Facile and effective synthesis strategy for terbium-doped hydroxyapatite toward photoelectric devices and flexible functional fibers

引用

Rare Metals 2024年第4期43卷 1713-1723页

作者： Xiao-Dong Zhang Kun Nie Zi-yao Hu Ran-Ran Zhou Xiu-Qiang Duan Wu-Bin Dai Song-Song Nie Song-Jun yao Luo-Xin Wang Le-Fu Mei Hua Wang yi-yi yao Xiao-Xue Ma Hubei Key Laboratory for New Textile Materials and Applications and State Key Laboratory of New Textile Materials and Advanced Processing Technology School of Materials Science and EngineeringWuhan Textile UniversityWuhan430200China Key Laboratory of Testing and Tracing of Rare Earth Products for State Market Regulation Jiangxi University of Science and TechnologyGanzhou341000China Hubei Key Laboratory of Plasma Chemistry and Advanced Materials and Key Laboratory of Green Chemical Engineering Process of Ministry of Education Wuhan Institute of TechnologyWuhan430205China

As a material with good biocompatibility,hydroxyapatite(HAP)can have optical properties after doping with various rare earth *** a biocompatible fluorescent material,doped HAP could have broad applications in biological probes,drug delivery,optoelectronic materials,fluorescence anti-counterfeiting,and other *** this paper,we put forward the preparation of HAP doped with terbium(Ⅲ)ions(Tb^(3+))by hydrothermal *** controlling the Tb^(3+)doping content in reaction and the reaction time,the changes in HAP's structure,morphology,and luminescence properties under different conditions were *** the doping amount of Tb^(3+)reached an optimal value,the dipole-quadrupole would occur and the concentration would be *** control experiment showed that the optimal Tb3+content was 7.5×10^(-5)mol,which showed the best fluorescence ***,a non-luminous material,was rarely used in the field of fluorescent anti-counterfeiting and photoelectric *** proposed to prepare a luminescent aramid/polyphenylene sulfide(ACFs/PPS)fiber paper and a new light-emitting diode(LED)using the Tb-doped HAP *** composite sample exhibited an excellent stability and fluorescence performance,which also demonstrated a possibility of HAP applications in anticounterfeiting and *** introduction of Tb3+dopant HAP was done to give HAP optical properties and broaden the application range of HAP.

关键词： Hydroxyapatite Rare earth luminescence Photoelectric device Aramid Polyphenylene sulfide fiber paper Luminescent fiber

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of lens surgery on health-related quality of life in preschool children with congenital ectopia lentis

引用

International Journal of Ophthalmology(English edition) 2024年第1期17卷 66-72页

作者： Yan-Qiao Huang Qian-Zhong Cao yi-yao Wang yi-Jing Zhou Dan-ying Zheng State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangdong Provincial Clinical Research Center for Ocular DiseasesGuangzhou 510060Guangdong ProvinceChina

AIM:To evaluate the effect of lens surgery on health-related quality of life(HRQoL)of preschool children with congenital ectopia lentis(CEL).METHODS:A prospective self-controlled study was conducted in Zhongshan Ophthalmic *** aged from 5 to 7y whom were diagnosed with CEL and underwent phacoemulsification with scleral-fixated posterior chamber intraocular lens implantation and their parents were enrolled in this *** of them completed the child and proxy(parental)PedsQL™4.0 before and after the *** preoperative scores were compared to their postoperative *** analyses were performed based on gender and preoperative bilateral presenting visual acuity of the ***:Thirty-two children with CEL successfully underwent surgery without any complications,among whom 8 had monocular surgery and 24 had binocular *** and postoperative questionnaires were completed by 32 child-parent *** intervention could significantly improve the vision of affected children(P<0.001).The medians of physical,psychosocial and total health scores self-reported by the children were 68.75(62.50,81.25),65.00(60.00,80.00)and 67.39(60.87,78.26)preoperatively and were 93.75(87.50,100.00),90.00(83.33,96.67)and 89.13(85.32,95.65)*** preoperative scores of the affected children were significantly lower in all scales than age-matched healthy children(P<0.001).All the postoperative scores were significantly higher than the preoperative scores in affected children and their parents(P<0.001).In the physical functioning evaluation,the preoperative score reported by parents of girls was higher than parents of boys(P=0.041),and the postoperative score of girls was higher than that of boys(P=0.036).CONCLUSION:CEL is associated with significantly worse quality of life in preschool *** intervention can significantly improve the HRQoL in affected children from both personal and family perspective.

关键词： congenital ectopia lentis surgical intervention health-related quality of life preschool children

来源：

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

Anti-OX40 Antibody Combined with HBc VLPs Delays Tumor Growth in a Mouse Colon Cancer Model

引用

Biomedical and Environmental Sciences 2024年第2期37卷 187-195页

作者： LIU Jia Jia SU Qiu Dong yi yao SHEN Li Ping BI Sheng Li National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and PreventionBeijing 102206China

Objective Combination immunotherapy strategies targeting OX40,a co-stimulatory molecule that can enhance antitumor immunity by modulating the proliferation,differentiation,and effector function of tumor-infiltrating T cells,have attracted much attention for their excellent therapeutic *** this study,we aimed to evaluate the antitumor efficacy of combined anti-OX40 and hepatitis B core viruslike particles(HBc VLPs)therapy using a mouse colon cancer *** Humanized B-h OX40 mice were injected subcutaneously with MC38 colon tumor cells and treated with HBc VLPs+anti-h OX40 *** growth was *** cytometric analysis was performed to evaluate the populations of T cell subsets in the *** The combination of anti-OX40 with HBc VLPs resulted in a significant delay in tumor growth,suggesting that a potent antitumor immunity was induced by the combination *** studies revealed that HBc VLPs+anti-OX40 treatment induced a significant increase in effector T cells(Teffs)and a significant decrease in regulatory T cells(Tregs)in the tumor microenvironment(TME),which accounted for the synergistic antitumor effect of anti-OX40 in combination with HBc *** Combination therapy of anti-h OX40 and HBc VLPs provides synergistic antitumor activity in colon cancer-bearing mice,which may represent a potential design strategy for cancer immunotherapy.

关键词： Anti-OX40 antibody Hepatitis B core virus-like particles Tumor Combination therapy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of PEAR1 gene polymorphism on big endothelin-1 levels in Chinese patients with acute myocardial infarction after percutaneous coronary intervention

引用

World Journal of Emergency Medicine 2024年第3期15卷 229-231页

作者： yi yao Na Xu Xiaofang Tang Ce Zhang Sida Jia Jingjing Xu ying Song Xueyan Zhao Runlin Gao Jinqing Yuan Center for Coronary Heart Disease National Center for Cardiovascular DiseasesState Key Laboratory of Cardiovascular DiseaseFuwai HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100037China

Acute myocardial infarction (AMI) has been associated with poor prognosis,even after revascularization with percutaneous coronary intervention (PCI),likely due to coronary endothelial cell dysfunction and injury.^([1,2])Endothelin-1 (ET-1),a peptide that serves as a vasoconstrictor of smooth muscle cell proliferation,can reflect endothelial cell functional *** to low circulation levels and short plasma half-life time,measuring plasma ET-1 levels is *** contrast,big ET-1.

关键词： coronary percutaneous endothelin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

多级多重模态减缩策略及其在转子系统动力学特性分析上的应用

引用

振动工程学报 2024年第5期37卷 737-746页

作者：姚毅黄行蓉管晓乐徐迅张大义北京航空航天大学中法工程师学院/国际通用工程学院北京100191 北京航空航天大学航空发动机研究院北京102206 北京理工大学机械与车辆学院北京100081 航天科工空天动力研究院(苏州)有限责任公司江苏苏州215131 北京航空航天大学能源与动力工程学院北京100191 北京航空航天大学航空发动机结构强度北京市重点实验室北京100191

航空发动机转子部件众多,多部件高维复杂系统计算量大,导致动力学分析困难、计算时间长,进而影响转子结构设计和动力学验证的效率。基于部件模态综合方法,提出一种针对多部件高维复杂系统降维计算的多级模态减缩策略。对每个单独的子结... 详细信息

航空发动机转子部件众多,多部件高维复杂系统计算量大,导致动力学分析困难、计算时间长,进而影响转子结构设计和动力学验证的效率。基于部件模态综合方法,提出一种针对多部件高维复杂系统降维计算的多级模态减缩策略。对每个单独的子结构利用固定界面模态减缩,并行减缩各子结构的内部自由度,同时完整保留子结构间的耦合关系。通过子结构组合定义新一级的子结构,应用多级模态减缩策略提升降维减缩效果,结合多重模态减缩方法,构建界面分支模态,可显著降低转子有限元模型的维数,同时保留关键子结构的动力学特征和系统整体关键动力学特性。此计算策略被用于某弹用发动机转子系统低维减缩模型的建立,利用减缩模型提升了转子动力学分析的效率,加速轴承刚度参数的优化设计。研究结果表明,与ANSYS计算相比,转子动力学分析所需时间降低了99.5%,精度误差不超过0.1%,该计算策略可用于多部件高维复杂系统的快速分析。

关键词：转子动力学部件模态综合多级模态减缩模态减缩部件优化

来源：

维普期刊数据库

同方期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Successful conversion of advanced gastric cancer treated by immunotherapy combined with chemotherapy: A case report

引用

Cancer Advances 2024年第8期7卷 1-6页

作者： Xue-Mei Sun Fu-Rong Sun Wei-Wei Zheng Hai Yu Ming-Chen Liu Han-yi yao Li-Min Huang Shandong University of Traditional Chinese Medicine Jinan 250013China Department of Spleen and Stomach Diseases Weifang Traditional Chinese Medicine HospitalWeifang 261041China Department of Pathology Weifang Hospital of Traditional Chinese MedicineWeifang 261041China Department of Oncology Weifang Hospital of Traditional Chinese MedicineWeifang 261041China

Gastric cancer is one of the most common malignant tumors,for patients with advanced gastric cancer,the traditional treatment is mainly chemotherapy or combined targeted therapy;however,these have not achieved ideal ***,with the continuous deepening of research on molecular targeted drugs and immunosuppressants,the treatment of advanced gastric cancer patients has made new progress,and some new technologies have also been continuously emerged and applied,which brings hope for the treatment of advanced gastric ***,several multicenter randomized controlled phase III studies on immunotherapy for advanced gastric cancer yielded encouraging results,demonstrating its superior efficacy in the treatment of advanced gastric ***,prospective data to support the acceptance of surgery and the R0 removal rate following conversion therapy with immune checkpoint inhibitors are *** this study,a 58-year-old woman with advanced gastric cancer and positive PD-L1 expression,negative HER-2 expression,and microsatellite stable status received immunochemotherapy combined with traditional Chinese medicine to achieve R0 resection and satisfactory efficacy.

关键词： late gastric cancer conversion therapy immunotherapy Traditional Chinese medicine

来源：

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

利用紫外分光光度法测定巴里坤湖总氮的分析研究

引用

陕西水利 2024年第4期 100-103页

作者：姚毅新疆哈密水文水资源勘测局新疆哈密839000

总氮量是评价水质是否被污染的一项关键指标,利用紫外分光光度法对巴里坤湖水样中的总氮含量进行分析研究,通过标准曲线的制备和样品的测定,得到巴里坤湖的总氮浓度值,并进行数据分析和结果解释,构建一个可靠的总氮测定方法 ,可为巴里... 详细信息

总氮量是评价水质是否被污染的一项关键指标,利用紫外分光光度法对巴里坤湖水样中的总氮含量进行分析研究,通过标准曲线的制备和样品的测定,得到巴里坤湖的总氮浓度值,并进行数据分析和结果解释,构建一个可靠的总氮测定方法 ,可为巴里坤湖的水质评价提供科学依据。研究最后对去除高盐含量对总氮测定值影响方法进行分析,可为巴里坤湖的水质评价提供重要的数据,同时也可为其他相关领域的水质分析提供经验和参考。

关键词：紫外分光光度法总氮测定

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

高校辅导员开展大学生法治教育工作路径探赜

引用

成才之路 2024年第22期 33-36页

作者：姚艺运城师范高等专科学校山西运城044000

高校辅导员开展大学生法治教育工作,既是建设社会主义法治国家的需要,也是预防大学生犯罪,促进高校治理能力现代化的需要,更是促进大学生全面发展的内在需要。辅导员要提高自身法治教育能力,丰富大学生法治教育内容,拓宽大学生法治教育... 详细信息

高校辅导员开展大学生法治教育工作,既是建设社会主义法治国家的需要,也是预防大学生犯罪,促进高校治理能力现代化的需要,更是促进大学生全面发展的内在需要。辅导员要提高自身法治教育能力,丰富大学生法治教育内容,拓宽大学生法治教育形式,真正把法治教育工作融入学生日常管理工作中,推进依法治校,切实提高大学生法治素养,改善育人效果,更好地完成立德树人根本任务。

关键词：高校辅导员大学生法治教育立德树人

来源：

维普期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

粉煤灰基P型沸石吸附水中Cu^(2+)和Cd^(2+)

引用

中国环境科学 2024年第6期44卷 3132-3141页

作者：孙昊勇汪泽华姚亦扬吴代赦南昌大学资源与环境学院江西南昌330031 萍乡学院材料与化学工程学院江西萍乡337000

以粉煤灰(FA)为原料经水热反应合成了P型沸石(Z-P).采用X射线荧光光谱仪、X射线衍射仪、场发射环境扫描电子显微镜、比表面孔径分析仪、傅里叶变换红外光谱仪和X射线光电子能谱对Z-P进行表征,并研究了其对Cu^(2+)和Cd^(2+)的吸附性能.... 详细信息

以粉煤灰(FA)为原料经水热反应合成了P型沸石(Z-P).采用X射线荧光光谱仪、X射线衍射仪、场发射环境扫描电子显微镜、比表面孔径分析仪、傅里叶变换红外光谱仪和X射线光电子能谱对Z-P进行表征,并研究了其对Cu^(2+)和Cd^(2+)的吸附性能.结果表明,Z-P的BET比表面积和孔隙体积分别为38.46m^(2)/g和0.2180cm^(3)/g,均高于FA的1.273m^(2)/g和0.0120cm^(3)/***、Z-P对Cu^(2+)和Cd^(2+)的吸附更符合拟二级动力学模型和Langmuir等温线模型.Z-P对Cu^(2+)和Cd^(2+)的最大吸附量分别为157.48,131.57mg/g,远高于于FA的30.88,25.47mg/g.Z-P对Cd^(2+)的循环再生吸附效果好,但对Cu^(2+)的循环再生吸附效果较差.离子强度对Z-P吸附Cu^(2+)和Cd^(2+)分别起促进和抑制作用.表明Z-P可以作为有效且廉价的Cu^(2+)、Cd^(2+)吸附剂,为FA的资源化利用和含Cu^(2+)、Cd^(2+)重金属离子废水吸附剂的开发提供了一种方法.

关键词：粉煤灰 P型沸石吸附 Cu^(2+) Cd^(2+)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：