检索结果-南通市图书馆

An improved simple model for α decay half-lives

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第7期48卷 131-159页

作者：朱小彦骆松高玮亓林静李明李小华林文斌 School of Nuclear Science and Technology University of South ChinaHengyang 421001China School of Physical Science and Technology Southwest Jiaotong UniversityChengdu 610031China School of Mathematics and Physics University of South ChinaHengyang 421001China Cooperative Innovation Center for Nuclear Fuel Cycle Technology&Equipment University of South ChinaHengyang 421001China National Exemplary Base for International Sci&Tech.Collaboration of Nuclear Energy and Nuclear Safety University of South ChinaHengyang 421001China

In this paper,using theαparticle preformation probabilities Pαfrom Xu et al.[Xu and Ren,***.A 760,303(2005)],which were extracted by fitting experimental half-lives ofαdecay,based on a phenomenological harmonic oscillator potential model(HOPM)[Bayrak,J Phys G 47,025102(2020)],refitting 178αdecay half-lives of even-even nuclei obtained from the latest nuclear property table NUBASE2020,we obtain the only one adjustable parameter V0-162.6 MeV in the HOPM,i.e.,the depth of nuclear *** corresponding root-mean-square(rms)deviation isσ-***,to consider the contribution of centrifugal potential to unfavoredαdecay half-lives,adding a new term■(d and l are the adjustable parameter and orbital angular momentum carried away by emittedαparticle)to the logarithmic form of favoredαdecay half-lives under the HOPM framework,we propose an improved simple model(ISM)for calculating favored and unfavoredαdecay *** the experimental half-lives of 205 unfavoredαdecay,we obtain *** ISM is used to calculate the unfavoredαdecay half-lives of 128 odd-A and 77 odd-odd *** results improve by 54.2%and 53.6%,respectively,compared with *** addition,we extend the ISM to predict theαdecay half-lives of 144 nuclei with Z=117,118,119,and *** comparison,the improved model with eight parameters(DUR)proposed by Deng et al.[Deng,***.C 101,034307(2020)]and the modified universal decay law(MUDL)proposed by Soylu et al.[Soylu,***.A 1013,122221(2021)]are also *** predictions of these models and/or formulas are generally consistent with each other.

关键词： harmonic oscillator potential αdecay half-lives centrifugal potential

Assessment of HER2 status in extramammary Paget disease and its implication for disitamab vedotin,a novel humanized anti-HER2 antibody-drug conjugate therapy

在线全文

学校读者我要写书评

暂无评论

Frontiers of Medicine 2024年第3期18卷 565-569页

作者： Jia Jia Lili Mao jing lin Wenyu Li Pei Yuan Lei Guo Jie Dai Caili Li Xue Bai Zhongwu Li Yu Chen Jun Guo Jianming Ying Lu Si State Key Laboratory of Molecular Oncology Department of PathologyNational Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing100021China Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Department of Melanoma and SarcomaPeking University Cancer Hospital&InstituteBeijing100142China Department of Medical Oncology Clinical Oncology School of Fujian Medical UniversityFujian Cancer HospitalFuzhou350014China Department of Pathology Peking University Cancer Hospital&InstituteBeijing100142China

Dear Editor,Extramammary Paget disease(EMPD)is a rare adenocarcinoma that originates in the apocrine gland-rich skin and usually affects the perineal skin(primary EMPD)or represents the intraepithelial spread of an underlying visceral carcinoma(secondary EMPD).Approximately half of EMPD cases are confined to the epidermis,which was defined as intraepithelial EMPD.

关键词： Paget HER2 adenocarcinoma

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

基于期权博弈的可再生能源投资定价策略

系统工程学报 2024年第3期39卷 428-443页

作者：林晶吴赐联福建江夏学院数理教研部福建福州350108 福建江夏学院会计学院福建福州350108

在电力需求随机波动下,如何通过市场和政策引导可再生电力投资和市场消纳,避免保供缺口与弃风弃光成为可再生能源优化发展的重要研究方向.构建无限连续时间的Stackelberg动态博弈模型,研究发电商对可再生能源的最优投资策略和电网企业... 详细信息

在电力需求随机波动下,如何通过市场和政策引导可再生电力投资和市场消纳,避免保供缺口与弃风弃光成为可再生能源优化发展的重要研究方向.构建无限连续时间的Stackelberg动态博弈模型,研究发电商对可再生能源的最优投资策略和电网企业的最优定价策略,提出政府对可再生电力限价区间的优化设置.研究表明,若发电商等待投资,可再生电力收购价格增加促使其更早投资而非更多投资,电力需求波动增大使得发电商延长等待时间而非缩小投资规模.若发电商立即投资,更高的电力价格、更低的边际成本和更小的需求波动都将激励其增大投资规模.相对于短视策略和传统策略,期权投资策略为发电商带来更高价值.电网企业的最优定价取决于可再生电力价值以及政府限价,在可再生电力初始需求和期望增长率双重差异下其最优定价策略是稳健的.

关键词：可再生能源容量投资实物期权动态博弈

基于双频段雷达高度计数据的海面阵风反演研究

在线全文

学校读者我要写书评

暂无评论

海洋学报 2024年第4期46卷 133-142页

作者：林静张有广国家海洋环境预报中心北京100081 国家卫星海洋应用中心北京100081

海面阵风是海洋资源开发、海洋防灾减灾和海洋科研等领域所需的重要海洋动力环境信息。但迄今为止,海面阵风观测数据严重缺失,阻碍了阵风预报、应用研究等方面的发展。本文利用双频的HY-2B卫星高度计C、Ku波段的后向散射系数,对现有海... 详细信息

海面阵风是海洋资源开发、海洋防灾减灾和海洋科研等领域所需的重要海洋动力环境信息。但迄今为止,海面阵风观测数据严重缺失,阻碍了阵风预报、应用研究等方面的发展。本文利用双频的HY-2B卫星高度计C、Ku波段的后向散射系数,对现有海面风速(U_(10))进行修正,建立了阵风风速(U_(g))反演算法。反演结果与美国国家浮标数据中心(NDBC)2018-2022年的浮标数据进行真实性检验,相关系数(R)为0.91,均方根误差(RMSE)为1.82 m/s;国外同类卫星Jason-3基于本方法的反演结果与2018-2022年NDBC站点数据进行检验,RMSE优于常规2 m/s精度要求;反演结果与处于不同纬度的近海远洋站点进行个例验证,RMSE均优于2 m/s。因此,本文在现有的HY-2B卫星高度计海面风速观测数据的基础上,利用不同波段信息实现了海面阵风的观测,具有较高的观测精度。同时,该方法也适用于相同观测体制的国外卫星高度计。

关键词：雷达高度计反演算法海面阵风 HY-2B卫星后向散射系数

植被日光诱导叶绿素荧光高光谱成像仪研究(特邀)

在线全文

学校读者我要写书评

暂无评论

激光与光电子学进展 2024年第2期61卷 227-235页

作者：于磊汪涛林静中国科学院合肥物质科学研究院安徽光学精密机械研究所安徽合肥230031 中国科学技术大学研究生院科学岛分院安徽合肥230026 合肥师范学院化学与制药工程学院安徽合肥230601

植被日光诱导叶绿素荧光是一种可以表征植被光合生产力的重要衡量指标。为了实现对植被日光诱导叶绿素荧光的广域精准探测,设计并研制了一种叶绿素荧光高光谱成像探测仪。该成像探测仪使用了基于棱镜-体相位全息透射光栅的全透射式光学... 详细信息

植被日光诱导叶绿素荧光是一种可以表征植被光合生产力的重要衡量指标。为了实现对植被日光诱导叶绿素荧光的广域精准探测,设计并研制了一种叶绿素荧光高光谱成像探测仪。该成像探测仪使用了基于棱镜-体相位全息透射光栅的全透射式光学系统,在高数值孔径(0.25)的基础上实现了高光学性能:可在20°视场和670~780 nm(可扩展至650~800 nm)工作波段实现1 mrad的空间角分辨率、0.3 nm的光谱分辨率和优于100的信噪比。由系统设计结果、样机测试结果和应用数据分析结果可知,样机完全满足设计要求。本仪器可为农林监测和碳循环观测提供重要的科学数据,并可作为陆地植被光合作用中有效的新型观测手段。

关键词：植被观测日光诱导叶绿素荧光高光谱成像体相位全息透射光栅

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

石墨烯掺杂聚合物复合材料介电性能建模

航空学报 2024年第14期45卷 317-328页

作者：方子唯何晶靖林京北京航空航天大学可靠性与系统工程学院北京100191 北京航空航天大学宁波创新研究院高精尖制造技术与装备创新研究中心宁波315800

基于界面极化理论提出了一个石墨烯掺杂聚合物复合材料的介电模型,描述了石墨烯对复合材料有效介电常数的影响。该模型解释了石墨烯纳米片与聚合物基体在界面层的相互作用,计算了界面层的局部介电常数和局部电场强度,并通过控制变量方... 详细信息

基于界面极化理论提出了一个石墨烯掺杂聚合物复合材料的介电模型,描述了石墨烯对复合材料有效介电常数的影响。该模型解释了石墨烯纳米片与聚合物基体在界面层的相互作用,计算了界面层的局部介电常数和局部电场强度,并通过控制变量方式对模型内材料参数的影响进行了分析。与传统经验模型相比,提出的模型明确了分离上限距离、势垒高度、基体层电导率、石墨烯纳米片层尺寸等因素对有效介电常数的影响机制。对多类二元、三元介电复合材料体系的有效介电常数进行了预测,并与实验样品实测值、文献值进行对比,验证了所提出模型的有效性。

关键词：石墨烯介电常数界面极化聚合物复合材料掺杂改性

Clinical Study on the Therapeutic Effect of Combined Traditional Chinese Medicine with Acupoint Injection and Herbal Paste Application in Treating Ovulatory Dysfunction in Polycystic Ovary Syndrome (PCOS)

在线全文

学校读者我要写书评

暂无评论

Case Reports in Clinical Medicine 2024年第7期13卷 249-259页

作者： jing lin Xian Huang Qianfan Liang Hengzhen He Peng Ning Man Zhang Yilan Huang The First Affiliated Hospital of Guangxi University of Chinese Medicine Nanning China Renai Branch of the First Affiliated Hospital of Guangxi University of Chinese Medicine Nanning China Graduate School of Guangxi University of Chinese Medicine Nanning China

Objective: To observe the therapeutic effect of combined traditional Chinese medicine (TCM) therapy with acupoint injection and herbal patch application on patients with ovulatory dysfunction associated with polycystic ovary syndrome (PCOS). Methods: A total of 80 PCOS patients who received treatment at the First Affiliated Hospital of Guangxi University of Chinese Medicine between October 2022 and March 2024 were enrolled in this study. They were randomly divided into a control group (n = 40) and an observation group (n = 40). The control group received conventional Western medical treatments, while the observation group was administered TCM combined with acupoint injection and herbal patch application. Pre- and post-treatment conditions were compared between the two groups. Results: After treatment, the overall effective rate was significantly higher in the observation group compared to the control group (P 0.05). Following treatment, both ovulation and pregnancy rates increased in both groups, but the increase was more evident in the observation group, showing a statistically significant difference (P linical outcomes.

关键词： External TCM Therapies Acupoint Injection Polycystic Ovary Syndrome Ovulation Dysfunction

Solving Quantum Many-Particle Models with Graph Attention Network

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

Chinese Physics Letters 2024年第3期41卷 7-14页

作者：于启航林子敬 Department of Physics University of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China

Deep learning methods have been shown to be effective in representing ground-state wavefunctions of quantum many-body systems,however the existing approaches cannot be easily used for non-square like or large *** propose a variational ansatz based on the graph attention network(GAT)which learns distributed latent representations and can be used on non-square lattices.

关键词： representing variational quantum

STAT3-Dependent Effects of Polymeric Immunoglobulin Receptor in Regulating Interleukin-17 Signaling and Preventing Autoimmune Hepatitis

在线全文

学校读者我要写书评

暂无评论

Engineering 2024年第5期36卷 209-222页

作者： Ting Li Tongtong Pan Nannan Zheng Xiong Ma Xiaodong Wang Fang Yan Huimian Jiang Yuxin Wang Hongwei lin jing lin Huadong Zhang Jia Huang lingming Kong Anmin Huang Qingxiu Liu Yongping Chen Dazhi Chen Hepatology Diagnosis and Treatment Center The First Affiliated Hospital of Wenzhou Medical University&Zhejiang Provincial Key Laboratory for Accurate Diagnosis and Treatment of Chronic Liver DiseasesWenzhou 325035China Department of Clinical Medicine Hangzhou Medical CollegeHangzhou 310053China State Key Laboratory for Oncogenes and Related Genes Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200001China Wenzhou Medical University Wenzhou 325035China Division of Infectious Diseases Lishui People’s HospitalLishui 323000China

One-third of patients with autoimmune hepatitis(AIH)have cirrhosis at the time of *** relevance of these variables,although unknown,is believed to be critical in AIH because of suspected interactions between the gut microbiome and genetic *** of the gut flora and elevated polymeric immunoglobulin receptor(pIgR)levels have been observed in both patients and mouse ***,there is a direct relationship between pIgR expression and transaminase levels in patients with *** this study,we aimed to explore how pIgR influences the secretion of regenerating islet-derived 3 beta(Reg3b)and the flora composition in AIH using in vivo experiments involving patients with AIH and a concanavalin A-induced mouse model of ***3b expression was reduced in pIgR gene(Pigr)-knockout mice compared to that in wild-type mice,leading to increased microbiota ***,exogenous pIgR supplementation increased Reg3b expression and maintained microbiota *** sequencing revealed the participation of the interleukin(IL)-17 signaling pathway in the regulation of Reg3b through ***,the introduction of external pIgR could not restore the imbalance in gut microbiota in AIH,and the decrease in Reg3b expression was not apparent following the inhibition of signal transducer and activator of transcription 3(STAT3).In this study,pIgR facilitated the upregulation of Reg3b via the STAT3 pathway,which plays a crucial role in preserving the balance of the intestinal microbiota in *** this research,we discovered new molecular targets that can be used for the diagnosis and treatment of AIH.

关键词： Autoimmune hepatitis Polymeric immunoglobulin receptor Regenerating islet-derived 3 beta Intestinal microbiota Signal transducer and activator of transcription 3