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基于改进PSO算法设计的TFLn平台偏振不敏感光栅耦合器

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光通信技术 2024年第4期48卷 9-14页

作者：李坚平邓冶王烈张振荣广西大学计算机与电子信息学院南宁530004 广西多媒体通信与网络技术重点实验室南宁530004 广西高校多媒体通信与信息处理重点实验室南宁530004

针对光栅耦合器存在偏振依赖性问题,在薄膜铌酸锂(TFLn)平台上相继设计了标准型和改进型偏振不敏感光栅耦合器。在设计过程中,首先对粒子群(PSO)算法进行了改进,然后利用改进后的PSO算法对光栅参数进行了优化,包括光栅周期、占空比、刻... 详细信息

针对光栅耦合器存在偏振依赖性问题,在薄膜铌酸锂(TFLn)平台上相继设计了标准型和改进型偏振不敏感光栅耦合器。在设计过程中,首先对粒子群(PSO)算法进行了改进,然后利用改进后的PSO算法对光栅参数进行了优化,包括光栅周期、占空比、刻蚀深度以及入射角等关键参数。最后,设计了偏振不敏感啁啾光栅耦合器,并通过线性啁啾调节有效折射率,从而显著提升了耦合效率和偏振不敏感带宽。仿真结果表明:在波长为1 544 nm时耦合效率最高,偏振不敏感啁啾光栅耦合器的横电(TE)、横磁(TM)模式耦合损耗分别为-4.88、-5.05 dB;在1 500~1 580 nm波长内偏振相关损耗(PDL)小于0.5 dB,偏振不敏感带宽为45 nm。

关键词：薄膜铌酸锂偏振不敏感光栅耦合器啁啾改进粒子群算法

Guidelines for diagnosis and treatment of hepatic fibrosis with integrated traditional Chinese and Western medicine(2019 edition)

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Journal of Integrative Medicine 2020年第3期18卷 203-213页

作者： lie-ming Xu Ping Liu Institute of Liver Diseases Shanghai University of Traditional Chinese Medicine

In 2006, the Hepatology Committee of Chinese Association of Integrative Medicine issued the "Guidelines for the Prevention and Treatment of Liver Fibrosis with Integrated Traditional Chinese and Western Medicine." In recent years, the fields of Chinese medicine, Western medicine, and integrative medicine have made rapid advances in basic and clinical research into chronic liver disease, and accumulated new evidence for the prevention and treatment of hepatic fibrosis. Therefore, in order to meet clinical needs, liver disease experts of integrated traditional Chinese and Western medicine were united to revise the previous guidelines in order to help physicians make correct and reasonable decisions in the diagnosis and treatment of hepatic fibrosis.

关键词： Hepatic fibrosis Integrated traditional Chinese and Western medicine Medicine,Chinese traditional Diagnosis Therapy Practice guideline

Rolling-element bearings in China： From ancient times to the 20th century

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Frontiers of Mechanical Engineering 2016年第1期11卷 33-43页

作者： lie SUn Ang LI Institute for the History of natural Sciences Chinese Academy of Sciences Beijing 100190 China

The development of rolling-element bearings in China has spanned a long period. Based on several typical and important cases, the present article reconstructs the history of rolling-element bearings in China by dividing it into four stages according to the various characteristics of the bearings. The first stage represents the origin of rolling beatings in China, which remains controversial because of several suspected races and cages that were likely the components of bearings more than a millennium ago. At the second stage, a type of simple roller bearing was used for astronomical instru- ments not later than the 13th century based on clear philological and physical evidence. A similar bearing was also applied to an abridged armillary in the 17th century. Another type of spherical thrust bearings with rolling elements, which is a key component of a traditional Chinese windmill, could support a rotating shaft that moves rotationally and at an angle. At the third stage, the Chinese began studying and using the so-called European- style bearing since the 17th century. Moreover, over the last 100 years, the modem rolling bearing industry was gradually established in China, particularly because of the technology transfer from the Soviet Union in the 1950s. At the fourth stage, the Chinese government initiated the relatively rapid development of beating technology. The govemment launched the ＂bearing movement＂ from the 1950s to the 1960s to establish the modem bearing industry and to promote rolling bearings as replacement for traditional sliding bearings. Furthermore, a number of large professional factories and institutions in China have continually introduced advanced technology and equip- ment. At present, these companies and institutions play a significant role in the intemational bearing industry.

关键词： rolling-element bearing China early rolling bearings technology transfer bearing movement

Abundance Distribution of Slow—Process Main Heavy Elements in AGB Stars

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Chinese Physics Letters 2003年第6期20卷 962-964页

作者： ZHAnGMiao-Jing ZHAnGBO LIGuang-lie InstituteofHighEnergyPhysics ChineseAcademyofSciencesBeijing100039

By re-analysing the results of the theoretical abundance of asymptotic giant branch (AGB) stellar models and the observed abundances of 51 AGB samples, we find that the abundance distribution of s-process main heavy (SMH) elements of any AGB star is similar to the scaled s-process main component of the solar system. This means that superposition of the SMH element abundance distributions of AGB stars should be similar to the scaled solar s-process main component. As a conclusion, the abundance pattern of the solar SMH elements is not only an average result of a complex chemical evolution of galaxy, but also a typical one that can be used as a standard in abundance investigation.

关键词： Chemical elements

基于MPLC提高卡塞格林天线传输效率的方法

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激光与光电子学进展 2024年第13期61卷 224-231页

作者：阮铖高世杰马烈王晞名于溪畅张国强中国科学院长春光学精密机械与物理研究所吉林长春130031 中国科学院大学北京100049

卡塞格林天线作为重要的光学天线,广泛应用于空间激光通信中,但卡塞格林天线不可避免的次镜遮挡问题严重影响了传输效率。为了消除次镜遮挡所带来的不利影响,提出一种基于多平面光转换(MPLC)技术提高卡塞格林天线传输效率的方法,利用MPL... 详细信息

卡塞格林天线作为重要的光学天线,广泛应用于空间激光通信中,但卡塞格林天线不可避免的次镜遮挡问题严重影响了传输效率。为了消除次镜遮挡所带来的不利影响,提出一种基于多平面光转换(MPLC)技术提高卡塞格林天线传输效率的方法,利用MPLC将通信高斯光转换为与卡塞格林天线遮拦比相匹配的双高斯环形光,使出射光充满卡塞格林天线有效范围的同时避开次镜遮挡。所提方法适用于任意遮拦比的卡塞格林天线,均可以大幅提升传输效率,降低了通信难度,对于远距离传输的空间激光通信研究具有一定意义。

关键词：卡塞格林天线激光通信传输效率多平面光转换

Influence of Prenatal Surveillance on Maternal and Perinatal Prognosis: A Prospective Study over 6 Months at the Maternity Ward of the Owendo University Hospital (Gabon)

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Open Journal of Obstetrics and Gynecology 2024年第2期14卷 301-311页

作者： Boniface Sima Ole Sidy Gérard Mba Edou Ulysse Minkobam Désire Assoume Ophélie Makoyo komba nathalie Ambounda Pamphile Assoumou Jacques Albert Bang ntamack Sosthène Mayi Tsonga Jean François Meye Department of Obstetrics and Gynaecology Owendo University Hospital Owendo Gabon Department of Obstetrics and Gynecology Faculty of Medicine of Libreville Libreville Gabon

Introduction: The occurrence of pregnancy in women is a risky situation. Prenatal care is necessary, which is not often the case in our context. Aim: To analyze the influence of antenatal surveillance on maternal and perinatal prognosis. Patients and Method: Preliminary longitudinal and analytical survey at the Owendo University Hospital (OHU) over 6 months. It focused on prenatal surveillance. The study population consisted of parturients who gave birth within 24 hours and we studied sociodemographic characteristics, variables related to antenatal contact, those of delivery as well as maternal and newborn outcomes. Results: 2485 deliveries were recorded and 1300 patients were retained according to the inclusion criteria. no prenatal contact (AnC0) was performed in 93 (7.15%), insufficient (AnCI) in 943 patients (72.5%), and sufficient (AnCS) in 264 patients (20.30%). Patients with low school level were significantly found when the nPC was not performed or insufficient and the same was true for the group of patients who were not employed and those who were single (p n section rate and perinatal mortality are high in this case. Conclusion: The quality of prenatal contact is insufficient in our context. The absence or inadequacy of the latter has a strong negative impact on maternal and perinatal morbidity and mortality.

关键词： AnC Insufficiency Maternal Pathologies Perinatal Death Gabon

A MIXED FInITE ELEMEnT METHOD FOR THE COnTACT PROBLEM In ELASTICITY

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Journal of Computational Mathematics 2005年第4期23卷 441-448页

作者： Dong-ying Hua lie-heng Wang ICMSEC Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 China Graduate School of the Chinese Academy of Science Beijing 100080 China LSEC ICMSEC Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 China

Based on the analysis of [7] and [10], we present the mixed finite element approximation of the variational inequality resulting from the contact problem in elasticity. The convergence rate of the stress and displacement field are both improved from O（h3/4） to quasi-optimal O（h│logh│^1/4）. If stronger but reasonable regularity is available, the convergence rate can be optimal O（h）.

关键词： Contact problem Mixed finite element method

国医大师王烈运用补肾培元法治疗儿科疾病稳定期经验

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中华中医药杂志 2024年第4期39卷 1800-1803页

作者：陈慧丹杨福双孙丽平王烈(指导) 长春中医药大学长春130117 长春中医药大学附属医院儿童诊疗中心长春130021

基于小儿“肾常不足”的生理特性,王烈教授认为小儿在疾病恢复期多呈肾虚状态,将其责之于先天禀赋、他脏所累或久病损肾。故提倡以补肾培元法以扶正固本,以期达到未病先防、瘥后防复之目的。总结王烈教授临证运用补肾培元法治疗儿科疾... 详细信息

基于小儿“肾常不足”的生理特性,王烈教授认为小儿在疾病恢复期多呈肾虚状态,将其责之于先天禀赋、他脏所累或久病损肾。故提倡以补肾培元法以扶正固本,以期达到未病先防、瘥后防复之目的。总结王烈教授临证运用补肾培元法治疗儿科疾病稳定期经验,分别在哮喘稳定期用自拟固哮方以补肾培元,抑痰防哮;反复呼吸道感染稳定期用自拟固防饮以补肾培元,固表实卫;抽动障碍稳定期用自拟滋肾散以补肾培元,安脑充髓;过敏性紫癜稳定期用自拟补肾方以补肾培元,扶正固络。

关键词：儿科疾病王烈补肾培元稳定期名医经验

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融合TCn和BiLSTM的文本情感分析

计算机工程与设计 2024年第7期45卷 2090-2096页

作者：任楚岚仇全涛劣思敏沈阳化工大学计算机科学与技术学院辽宁沈阳110142 沈阳化工大学辽宁省化工过程工业智能化技术重点实验室辽宁沈阳110142

为在短文本语义情感分析过程中对词嵌入对情感语义充分表达,挖掘深层次语义信息,提出一种融合TCn和改进BiLSTM的文本情感分析算法。通过混合词嵌入对短文本向量化;将训练后的词向量先输入时序卷积网络,后输入到改进的双向长短时记忆网... 详细信息

为在短文本语义情感分析过程中对词嵌入对情感语义充分表达,挖掘深层次语义信息,提出一种融合TCn和改进BiLSTM的文本情感分析算法。通过混合词嵌入对短文本向量化;将训练后的词向量先输入时序卷积网络,后输入到改进的双向长短时记忆网络中提取情感特征;强制向前注意力机制对提取到的特征进行加权;通过softmax函数进行情感分类输出。通过在新冠疫情评论数据集建模,模型的各项指标均达到92%以上,相较于其它模型性能更优。

关键词：情感分析短文本混合词嵌入深度学习时序卷积网络双向长短时记忆网络强制向前注意力机制