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《学前教育法(草案)》中的若干法律问题

北京教育学院学报 2024年第3期38卷 24-30页

作者：湛中乐杜佳欣北京大学法学院北京100871

《中华人民共和国学前教育法(草案)》现已提请审议,学前教育领域的专门法律即将出台。此次立法完善应当把握好学前教育普惠、公益的总体方向,进一步考虑学前教育的法律定位、《中华人民共和国学前教育法》的调整范围、学前教育机构的规... 详细信息

《中华人民共和国学前教育法(草案)》现已提请审议,学前教育领域的专门法律即将出台。此次立法完善应当把握好学前教育普惠、公益的总体方向,进一步考虑学前教育的法律定位、《中华人民共和国学前教育法》的调整范围、学前教育机构的规划与举办、学前教育机构的财政保障、学前教育机构的管理体制以及教职工队伍建设等若干法律问题。通过对以上法律问题的思考,提出了对法律条文的具体修改建议,确保即将出台的《中华人民共和国学前教育法》既符合时代要求,又贴近现实需要,保障学前教育的法治化和规范化发展。

关键词：学前教育立法公益性普惠性儿童发展

科技期刊直播内容深度挖掘与持续化传播策略——以《中国图象图形学报》图图Seminar学术公益直播实践为例

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编辑学报 2024年第4期36卷 429-433页

作者：陈秀妍尤笛韩向娣赵席彬闫珺杜家昕中国科学院空天信息创新研究院《中国图象图形学报》编辑部北京100190 中国科学院空天信息创新研究院《遥感学报》编辑部北京100190 中国科学院空天信息创新研究院《Journal of Remote Sensing》编辑部北京100190

信息技术与移动互联网的快速发展,促使学术直播成为数字时代科技期刊探索媒体深度融合出版的新形式。本文围绕《中国图象图形学报》图图Seminar学术公益直播实践,采用问卷调查、重点用户访谈、数据分析等形式分析直播受众需求,总结直播... 详细信息

信息技术与移动互联网的快速发展,促使学术直播成为数字时代科技期刊探索媒体深度融合出版的新形式。本文围绕《中国图象图形学报》图图Seminar学术公益直播实践,采用问卷调查、重点用户访谈、数据分析等形式分析直播受众需求,总结直播内容,深度挖掘直播策略:选题策划瞄准学科前沿,内容安排契合科研链条上不同受众的主体需求;探析学术直播持续化传播路径:借助全媒体平台和私域流量池广泛宣传推广,建立“回放长视频-短视频-微信订阅号推文-期刊论文”的跨媒介内容传播链条。实践证明,科技期刊开展学术直播探索对于拓宽传播渠道、提升出版质量、增强用户黏性、塑造期刊品牌具有重要意义。

关键词：学术直播内容挖掘持续化传播新媒体期刊品牌塑造影响力提升

Discussion on the dimerization reaction of penicillin antibiotics

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Journal of Pharmaceutical Analysis 2022年第3期12卷 481-488页

作者： Qizhang Wu Xia Zhang jiaxin du Changqin Hu National Institutes for Food and Drug Control Beijing102629China

Penicillins are one type of the most important antibiotics used in the *** of drug impurity profiles is an important part of ensuring drug *** is particularly important in penicillins where polymerization can lead to polymers as elicitors of passive cutaneous *** current understanding of penicillin polymerization is based on reactions with amino groups,but no comprehensive mechanistic understanding has been ***,we used theoretical calculations and column switching-LC/MS techniques to study penicillin *** and benzylpenicillin were selected as representative penicillins with or without amino groups in the side chain,*** identified four pathways by which this may occur and the energy barrier graphs of each reaction process were *** benzylpenicillin without an amino group in the 6-side chain,dimerization mode A is the dominant mode,where the 2-carboxyl group of one molecule reacts with the b-lactam of another ***,ampicillin with an amino group in the 6-side chain favors dimerization mode C,where the amino group of one molecule attacks the b-lactam of another *** findings can lead to a polymer control approach to maintaining penicillin antibiotics in an active formulation.

关键词： Penicillins Dimerization reaction Theoretical calculations LC/MS

城市土地价格时空预测Stacking-GWR模型

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地理与地理信息科学 2024年第5期40卷 1-10页

作者：陈菲陈振杰李飞雪葛兰凤杜嘉欣聂北斗南京大学地理与海洋科学学院江苏南京210023

城市土地价格影响国土空间规划决策、现代城市治理和土地市场调控,预测城市土地价格具有重要意义,但不同用途的土地价格变化趋势差异显著且具有空间异质性,很难用单个模型进行预测。该文提出一种城市土地价格时空预测Stacking-GWR模型,... 详细信息

城市土地价格影响国土空间规划决策、现代城市治理和土地市场调控,预测城市土地价格具有重要意义,但不同用途的土地价格变化趋势差异显著且具有空间异质性,很难用单个模型进行预测。该文提出一种城市土地价格时空预测Stacking-GWR模型,以常州市主城区为研究区,根据土地价格变化趋势分为工业用地和非工业用地两组,利用Stacking-GWR模型进行土地价格预测,并与单独使用Stacking、地理加权回归(GWR)、时空地理加权回归(GTWR)模型的预测结果进行对比分析。结果表明:①Stacking-GWR模型融合了地价数据中的特征、空间和时间信息,能提高预测精度;②根据土地价格变化趋势进行分组后,模型预测精度优于不分组时的预测精度;③工业用地和非工业用地土地价格的全局和邻域影响因子差异显著。

关键词：土地价格地价预测集成学习地理加权回归常州市

基于精明增长理论的鹤庆传统村落保护发展研究

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西南林业大学学报（社会科学） 2024年第3期8卷 78-84,93页

作者：胡晓宇杜嘉欣唐雪琼西南林业大学地理与生态旅游学院云南昆明650233 西南林业大学园林园艺学院云南昆明650233

以鹤庆县具有代表性的传统村落彭屯为例,在梳理精明增长理论内涵的基础上,结合彭屯传统村落实际情况,从人口规模和空间规模、社会经济发展趋势、文化遗产保护传承、自然环境和宜居水平等4个层面,选取30个相关指标构建精明增长评价体系,... 详细信息

以鹤庆县具有代表性的传统村落彭屯为例,在梳理精明增长理论内涵的基础上,结合彭屯传统村落实际情况,从人口规模和空间规模、社会经济发展趋势、文化遗产保护传承、自然环境和宜居水平等4个层面,选取30个相关指标构建精明增长评价体系,用改进熵值法和综合评价模型测度,得彭屯村精明增长程度指数为0.53,显示彭屯村整体发展水平不理想。基于测度结果,分析彭屯村发展“不精明”原因,并尝试从用地规划、产业调整、遗产保护、村貌打造及多元主体共创等方面解决问题。

关键词：传统村落精明增长理论熵值法保护彭屯村

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无线通信系统和网络的强电磁脉冲作用效应

安全与电磁兼容 2024年第4期 9-18+31页

作者：江扬斌李秋辉杜佳欣田玲燕锋蒋之浩洪伟东南大学紫金山实验室

面对高频段人造强电磁脉冲的威胁,无线通信射频器件和模块表现出易受损、易干扰的缺陷,为提升无线通信系统和网络的电磁兼容性并有针对性地对其进行电磁防护,需系统地掌握强电磁脉冲对无线通信系统和网络的作用效应。目前,此效应的研究... 详细信息

面对高频段人造强电磁脉冲的威胁,无线通信射频器件和模块表现出易受损、易干扰的缺陷,为提升无线通信系统和网络的电磁兼容性并有针对性地对其进行电磁防护,需系统地掌握强电磁脉冲对无线通信系统和网络的作用效应。目前,此效应的研究主要集中在器件和模块层面,在系统级和网络级方面仍存在很多空白领域,需要开展探索性研究以阐明内在的影响规律和物理机制。文章从无线通信系统的角度,介绍了国内外无线通信射频器件、模块、系统以及无线通信网络的电磁脉冲效应研究的相关成果,并对潜在的研究方向进行了思考和展望。

关键词：通信系统通信网络电磁脉冲效应电磁干扰和损毁

Rate of Patient Delay among Students with Pulmonary Tuberculosis in China: A Meta-Analysis

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Journal of Biosciences and Medicines 2023年第4期11卷 278-295页

作者： jiaxin du Dongxia Cai Yongfa Chen International Pharmaceutical Business School China Pharmaceutical University Nanjing China

Objective: To systematically review the rate of patient delay of pulmonary tuberculosis (PTB) patients among students in China. Methods: Databases including Web of Science Core Collection, PubMed, The Cochrane Library, CBM, CNKI, VIP, and WANFANG DATA were electronically searched to collect cross-sectional studies on the incidence of delayed consultation in students with PTB in China from January 1, 2000, to November 15, 2022. Two researchers independently screened studies, extracted data, and assessed the risk of bias of the included studies. Meta-analysis was then performed by Stata 16.0 software. Results: In total, 60 cross-sectional studies with 260,707 cases involving 136,701 delayed consultation PTB patients were included. The results of meta-analysis showed that the rate of patient delay was 46.4% (95% CI 44.3% to 48.4%) among students with PTB in China. Results of subgroup analyses showed that: 1) The rates were 46.8% and 50.4% for male and female students, respectively. 2) The rates for the East, Central and West parts of China were 42.3%, 45.6% and 50.5%, respectively. 3) The rates were increased first and then decreased during 2007 to 2020. 4) The rates of students from primary school, junior high school, senior high school and university were 50.3%, 49.8%, 40.7% and 44.9%, respectively. 5) The rates for the Han and the other nationalities were 50.3% and 53.9%, respectively. 6) The rates for local and non-local students were 47.2% and 50.5%, respectively. 7) The rates of patients detected by consultation due to symptoms, recommendation due to symptoms, referral, tracking and healthy physical examination were 50.5%, 51.6%, 46.6%, 55.6% and 16.2%, respectively. 8) The rates of patients with initial PTB and retreatment PTB were 53.1% and 59.6%, respectively. 9) The rates of patients with positive etiology, negative etiology and without etiological results were 55.9%, 47.0% and 51.6%, respectively. 10) The rates of severe and non-severe patients were 59.4% an

关键词： China Student Pulmonary Tuberculosis Patient Delay Meta-Analysis Cross-Sectional Study

High-efficiency prediction method for helicopter global/ground noise based on near-field acoustic holography

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Chinese Journal of Aeronautics 2024年第7期37卷 271-284页

作者： Mengxue SHAO Yang LU Xice XU jiaxin LU National Key Laboratory of Helicopter Aeromechanics Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Noise reduction program design is an effective approach that relies on efficient noise prediction for reducing ground noise during *** existing noise prediction methods have the limitations of being computationally expensive or only applicable to *** this paper,a High-Efficiency Prediction Method(HEPM)for helicopter global/ground noise based on near-field acoustic holography is *** HEPM can predict the global noise based on acoustic modal analysis and has the advantages of high prediction accuracy and low time *** process is given as follows:firstly,the rotor noise on the holographic surface in the specified flight is obtained by simulations or ***,the global noise model,which maps time-domain noise to acoustic modes,is established based on near-field acoustic holography and Fourier acoustic analysis ***,combined with acoustic modal amplitude,the model established enables efficiently predicting the global/ground noise in the corresponding flight *** verify the accuracy of the prediction method,a simulation study is conducted in hovering and forward flight states using a model helicopter with a 2-meter rotor and Rotor Body Interaction(ROBIN)*** comparison of HEPM with numerical results shows that the average prediction errors of the global and ground noise are less than 0.3 dB and 0.2 dB,*** a region containing 100000 observers,the computation time of the HEPM is only one-fifth of that of the acoustic hemisphere method,demonstrating the rapidity of the proposed method.

关键词： Helicopter Rotor noise prediction Noise abatement procedure design Acoustic modal analysis Near-field acoustic holography

Narrowing of Balance Function and Hadronization Time at RHIC Energy

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Narrowing of Balance Function and Hadronization Time at RHIC...