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“窘”字音读考

汉语学报 2024年第2期 112-120页

作者：齐晓燕孙玉文华中科技大学人文学院 430074 北京大学中国语言文学系 100871

“窘”在唐宋以前音义配合单纯,主流读音是群母真韵合口三等上声。元明清时期,浊上变去已完成,但“窘”依然保持上声的读音,很可能在“窘”变成去声前已完成了清化,失去了发展为去声的条件。“窘”又受到声符“君”的同化作用,没有遵循... 详细信息

“窘”在唐宋以前音义配合单纯,主流读音是群母真韵合口三等上声。元明清时期,浊上变去已完成,但“窘”依然保持上声的读音,很可能在“窘”变成去声前已完成了清化,失去了发展为去声的条件。“窘”又受到声符“君”的同化作用,没有遵循全浊上声字中未变去声的字清化为送气音声母的规律,而是读为不送气音声母。民国初年“窘”维持着读书音“jǔn”的读法,随着京音取代老国音成为国音统一的标准,北京口语音“jiǒng”渐渐占据上风。新中国后,审音只保留了“jiǒng”的读音。“窘”北京口语音读“jiǒng”正与汉语部分方言臻摄阳声韵合口字与通摄合口三等阳声韵相混的现象一致,其音理是随着主元音央/■/的脱落,元音/u/的后高圆唇属性同化韵尾/-n/为/-■/。

关键词：窘历代读音北京音和读书音

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文学象征元素在玩具设计中的跨领域应用思考

玩具世界 2024年第3期 80-82页

作者：孙玉文鄂尔多斯生态环境职业学院

文学象征通过语言和形象表达深层含义，而玩具设计则以物质形态呈现创意。将文学象征元素巧妙地融入玩具设计中，可以使玩具超越单纯的娱乐功能，成为寓教于乐的媒介，进一步启发儿童的想象力和创造力。文章系统阐述文学象征的内涵、特... 详细信息

文学象征通过语言和形象表达深层含义，而玩具设计则以物质形态呈现创意。将文学象征元素巧妙地融入玩具设计中，可以使玩具超越单纯的娱乐功能，成为寓教于乐的媒介，进一步启发儿童的想象力和创造力。文章系统阐述文学象征的内涵、特性以及玩具设计的概念与表现手法等，指出二者的内在契合性，并提出具体的跨领域应用策略。

关键词：文学象征玩具设计跨领域思考寓教于乐想象力创造力

Tool path generation for 5-axis flank milling of ruled surfaces with optimal cutter locations considering multiple geometric constraints

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Chinese Journal of Aeronautics 2023年第12期36卷 408-424页

作者： Shuoxue sun yuwen sun Jinting XU School of Mechanical Engineering Dalian University of TechnologyDalian 116024China School of Automotive Engineering Dalian University of TechnologyDalian 116024China

Ruled surfaces found in engineering parts are often blended with a constraint surface,like the blade surface and hub surface of a centrifugal *** is significant to accurately machine these ruled surfaces in flank milling with interference-free and fairing tool path,while current models in fulfilling these goals are complex and *** this paper,a tool path planning method with optimal cutter locations(CLs)is proposed for 5-axis flank milling of ruled surfaces under multiple geometric *** be specific,a concise three-point contact tool positioning model is firstly developed for a cylindrical *** tool orientations arise when varying the three contact positions and a tool orientation pool with acceptable cutter-surface deviation is constructed using a meta-heuristic *** angular curves are derived from candidates in this pool,and then curve registration for cutter tip point on each determined tool axis is performed in respect of interference avoidance and geometric *** this basis,an adaptive interval determination model is developed for deviation control of interpolated cutter *** model is designed to be independent of the CL optimization process so that multiple CLs can be planned simultaneously with parallel computing ***,tests are performed on representative surfaces and the results show the method has advantages over previous meta-heuristic tool path planning approaches in both machining accuracy and computation time,and receives the best comprehensive performance compared to other multi-constrained methods when machining an impeller.

关键词： Flank milling Tool path Tool orientation pool Machining Ruled surface

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网络美好生活的表达机理与困境纾解

安康学院学报 2024年第2期36卷 81-86页

作者：杨琼孙玉雯黄山学院马克思主义学院安徽黄山245041

网络美好生活作为一种现实生活转向网络空间的新方式,反映出网络社会对美好生活的需求和期盼,具有内在的表达机理。它是公众对表达权利的一种情感体验,也是对网络社会和谐交往与幸福表达的价值追求。由于虚拟网络与现实生活的特点,网络... 详细信息

网络美好生活作为一种现实生活转向网络空间的新方式,反映出网络社会对美好生活的需求和期盼,具有内在的表达机理。它是公众对表达权利的一种情感体验,也是对网络社会和谐交往与幸福表达的价值追求。由于虚拟网络与现实生活的特点,网络美好生活也存在消极面向,面临诸多表达困境,其目标的实现有赖于网络社会质量的提升和现实美好生活双重世界的创造。应在中国式现代化的文化语境中努力建构具有现实呈照与价值引领的网络场域。

关键词：网络美好生活表达机理困境纾解

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基于心流体验的文旅服务设计研究

设计 2024年第8期37卷 62-65页

作者：孙煜文裴学胜河南科技大学艺术与设计学院

为了提高游客在文旅体验时的体验满意度,提升文旅系统的服务能力,将心流体验引入到服务设计中,探索社会多方可提供文旅服务的设计方法,实现社会多方的价值共创。结合心流体验要素、文旅服务阶段的场景及用户行为,采用5级李克特量表设计... 详细信息

为了提高游客在文旅体验时的体验满意度,提升文旅系统的服务能力,将心流体验引入到服务设计中,探索社会多方可提供文旅服务的设计方法,实现社会多方的价值共创。结合心流体验要素、文旅服务阶段的场景及用户行为,采用5级李克特量表设计调查问卷,通过SPSS软件,对收集的数据进行现状、相关性与回归分析,总结心流体验三要素与文旅体验满意度之间影响程度的权重。结合影响程度的优先级别,挖掘文旅服务体系的痛点,提出文旅服务体系的优化设计策略。将心流体验应用到洛阳文旅服务体系的设计实践中,探索文旅服务体系与其他领域之间结合的可能性,以期为文旅服务设计优化提供一条新的设计思路。

关键词：心流理论服务设计文化旅游用户体验界面设计

Path,feedrate and trajectory planning for free-form surface machining:A state-of-the-art review

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Chinese Journal of Aeronautics 2022年第8期35卷 12-29页

作者： yuwen sun Jinjie JIA Jinting XU Mansen CHEN Jinbo NIU School of Mechanical Engineering Dalian University of TechnologyDalian 116024China School of Automotive Engineering Dalian University of TechnologyDalian 116024China

Nowadays,free-form surfaces have been widely used in various industrial *** are usually machined by CNC machine tools,but recently have also begun to be manufactured by industrial robotic arm manipulators,thanks to low cost,large operation reaching space and high machining flexibility of *** far,various methodologies have been proposed to improve efficiency and quality of free-form surface machining,thus this paper aims at providing a state-ofthe-art review on research advances in free-form surface *** this review,tool path generation,feedrate scheduling in Cartesian space and trajectory planning in joint space are focused for both CNC machining and robot machining,and their research statues,existing difficulties and key issues are discussed in ***,the feasible routes,breakthrough points and future development trend are also expounded.

关键词： CNC machining Feedrate Free-form surface Robotic machining Tool path Trajectory

甲状腺功能正常人群甲状腺激素抵抗与高尿酸血症的相关性

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中华健康管理学杂志 2024年第6期18卷 428-432页

作者：孙蔚雯王晶康丽惠康林刘婷梁丽丽牛永红清华大学第一附属医院心脏中心北京100016 清华大学第一附属医院健康管理中心北京100016

目的分析甲状腺功能正常人群的甲状腺激素抵抗与高尿酸血症的相关性。方法本研究为横断面研究,选取2021年1月至2022年12月在清华大学第一附属医院心脏中心及健康管理中心住院和体检的甲状腺功能正常者548例。检测所有受试者的血液甲状... 详细信息

目的分析甲状腺功能正常人群的甲状腺激素抵抗与高尿酸血症的相关性。方法本研究为横断面研究,选取2021年1月至2022年12月在清华大学第一附属医院心脏中心及健康管理中心住院和体检的甲状腺功能正常者548例。检测所有受试者的血液甲状腺激素、尿酸、血脂等指标,计算甲状腺功能参数:促甲状腺激素指数(TSHI)、促甲状腺激素甲状腺素抵抗指数(TT4RI)、参数化甲状腺反馈分位数指数(PTFQI)、游离三碘甲腺原氨酸/游离甲状腺素(FT3/FT4)、外周脱碘酶活性总和(SPINA-GD)和甲状腺最大分泌能力(SPINA-GT)。根据血尿酸水平分为高尿酸血症组和正常组,比较两组的临床特征和甲状腺功能参数;探究甲状腺激素抵抗与高尿酸血症的关系。结果与正常组相比,高尿酸血症组中男性(94.4%和52.5%)、吸烟者占比(35.2%和21.3%)、体重指数[(27.10±3.96)和(24.26±3.42)kg/m2]、腰臀比[0.90(0.86,0.94)和0.86(0.80,0.91)]、肌酐[(85.50±12.27)和(73.77±28.79)μmol/L]、总胆固醇[(5.08±0.99)和(4.72±0.86)mmol/L]、甘油三酯[2.10(4.40,5.59)和1.14(0.79,1.67)mmol/L]、低密度脂蛋白[(3.19±0.97)和(2.85±0.84)mmol/L]、同型半胱氨酸[(15.07±9.13)和(12.50±10.85)μmol/L]水平较高,高密度脂蛋白[1.15(1.43,2.88)和1.39(1.16,1.64)mmol/L]水平较低(P<0.05);甲状腺激素及甲状腺功能参数方面,高尿酸血组比正常组在FT4[16.90(15.40,17.95)和16.00(14.30,17.80)pmol/L]、FT3[5.56(5.25,5.94)和5.22(4.81,5.63)pmol/L]、FT3/FT4[0.34(0.31,0.37)和0.32(0.29,0.36)]、TSHI(2.70±0.50和2.58±0.60)、PTFQI(0.406±0.332和0.335±0.353)及SPINA-GD[3.72(3.41,4.05)和3.52(3.18,4.00)]方面水平较高(均P<0.05)。Spearman相关分析显示,血尿酸水平与FT4(r=0.185)、FT3(r=0.422)、FT3/FT4(r=0.16)、TSHI(r=0.134)、TT4RI(r=0.09)、PTFQI(r=0.121)、SPINA-GD(r=0.157)呈正相关(均P<0.05)。结论甲状腺功能正常的人群中,甲状腺激素中枢性抵抗与高尿酸血症相关。

关键词：甲状腺激素甲状腺激素敏感性尿酸高尿酸血症

Reconstructing historical forest fire risk in the non-satellite era using the improved forest fire danger index and long short-term memory deep learning-a case study in Sichuan Province,southwestern China

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Forest Ecosystems 2024年第1期11卷 87-99页

作者： yuwen Peng Huiyi Su Min sun Mingshi Li Co-Innovation Center for Sustainable Forestry in Southern China Nanjing Forestry UniversityNanjing 210037China College of Forestry Nanjing Forestry UniversityNanjing 210037China

Historical forest fire risk databases are vital for evaluating the effectiveness of past forest management approaches,enhancing forest fire warnings and emergency response capabilities,and accurately budgeting potential carbon emissions resulting from ***,due to the unavailability of spatial information technology,such databases are extremely difficult to build reliably and completely in the non-satellite *** study presented an improved forest fire risk reconstruction framework that integrates a deep learning-based time series prediction model and spatial interpolation to address the challenge in Sichuan Province,southwestern ***,the forest fire danger index(FFDI)was improved by supplementing slope and aspect *** compared the performances of three time series models,namely,the autoregressive integrated moving average(ARIMA),Prophet and long short-term memory(LSTM)in predicting the modified forest fire danger index(MFFDI).The bestperforming model was used to retrace the MFFDI of individual stations from 1941 to *** this,the Anusplin spatial interpolation method was used to map the distributions of the MFFDI at five-year intervals,which were then subjected to weighted overlay with the distance-to-river layer to generate forest fire risk maps for reconstructing the forest fire danger *** results revealed LSTM as the most accurate in fitting and predicting the historical MFFDI,with a fitting determination coefficient(R^2)of 0.709,mean square error(MSE)of0.047,and validation R^2 and MSE of 0.508 and 0.11,*** validation of the predicted forest fire risk maps indicated that 5 out of 7 historical forest fire events were located in forest fire-prone areas,which is higher than the results determined from the original FFDI(2 out of 7).This proves the effectiveness of the improved MFFDI and indicates a high level of reliability of the historical forest fire risk reconstruction method proposed in this stu

关键词： Forest fire risk reconstruction MFFDI Time series models LSTM ARIMA Prophet Anusplin

A multi-order method for predicting stability of a multi-delay milling system considering helix angle and run-out effects

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Chinese Journal of Aeronautics 2018年第6期31卷 1375-1387页

作者： Shanglei JIANG yuwen sun Key Laboratory for Precision and Non-Traditional Machining Technology of the Ministry of Education Dalian University of Technology

In this paper, a multi-delay milling system considering helix angle and run-out effects is firstly established. An exponential cutting force model is used to model the interaction between a work-piece and a cutting tool, and a new approach is presented for accurately calibrating exponential cutting force coefficients and cutter run-out parameters. Furthermore, based on an implicit multi-step Adams formula and an improved precise time-integration algorithm, a novel stability prediction method is proposed to predict the stability of the system. The involved time delay term and periodic coefficient term are integrated as a comprehensive state term in the integral response which is approximated by the Adams formula. Then, a Floquet transition matrix with an arbitraryorder form is constructed by using a series of matrix multiplication, and the stability of the system is determined by the Floquet theory. Compared to classical semi-discretization methods and fulldiscretization methods, the developed method shows a good performance in convergence, efficiency,accuracy, and multi-order complexity. A series of cutting tests is further carried out to validate the practicability and effectiveness of the proposed method. The results show that the calibration process needs a time of less than 5 min, and the stability prediction method is effective.

关键词： Cutting force Floquet theory Milling stability Multi-delay milling system Run-out