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出版新质生产力赋能数字出版业高质量发展的机制与路径探究

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中国数字出版

中国数字出版 2024年第3期2卷 21-28页

作者：杨石华中国传媒大学传播研究院

发展出版新质生产力是深化中国式出版现代化的必经之路。作为中国式出版现代化直观表征的数字出版业，其高质量发展需要建立在出版新质生产力的基础上，即创新生产要素配置实现数字出版业行动者网络再优化。数字出版业高质量发展的行动... 详细信息

发展出版新质生产力是深化中国式出版现代化的必经之路。作为中国式出版现代化直观表征的数字出版业，其高质量发展需要建立在出版新质生产力的基础上，即创新生产要素配置实现数字出版业行动者网络再优化。数字出版业高质量发展的行动者网络优化，以新数字出版人和智能出版技术共同占据枢纽位置，在人机协作中转译传统出版企业、优质数字内容创作者、读者/用户、投融资机构、互联网科技企业等多元行动者主体的利益诉求，同时使其联结成为一个开放式协作网络。出版新质生产力赋能数字出版业高质量发展时，数字出版管理制度需要得到及时优化、相应的知识消费新模式需要得到建立、用户的情绪体验和收获体验需要得到重视并以此为依据进行知识服务创新。

关键词：新质生产力技术赋能转译数字出版业行动者网络

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出版企业儿童有声阅读平台的建设与运营分析

中国数字出版

中国数字出版 2024年第1期2卷 83-89页

作者：杨石华刘燕中国传媒大学传播研究院北京100024

数字阅读的听觉转向和自身的数字化转型升级促使出版企业积极探索有声阅读平台。目前,我国参与儿童有声阅读平台建设的出版企业相对较少,但仍取得了一定的成绩,聚焦其建设概况和存在的问题,不仅有助于推动传统出版社数字化转型升级,还... 详细信息

数字阅读的听觉转向和自身的数字化转型升级促使出版企业积极探索有声阅读平台。目前,我国参与儿童有声阅读平台建设的出版企业相对较少,但仍取得了一定的成绩,聚焦其建设概况和存在的问题,不仅有助于推动传统出版社数字化转型升级,还能充分保障儿童有声阅读平台生态的健康发展和儿童群体的阅读权益。文章以“小荷听书”“小书童”和“小凤凰FM”为案例研究对象,聚焦其平台建设和运营推广,用以分析出版企业儿童有声阅读平台的建设概况及其存在问题并提出改进建议,以期为其他出版企业进入儿童有声阅读平台领域提供借鉴。

关键词：儿童有声阅读平台数字出版小荷听书小书童小凤凰FM

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有效应力下连续级配煤体的渗透特性试验

煤炭学报 2024年第9期49卷 3872-3883页

作者：张磊杨世华武晋宇刘荣涛潘红宇张天军西安科技大学安全科学与工程学院陕西西安710054

瓦斯抽采钻孔孔周煤体的应力变化是影响其渗透特性的重要因素之一。为研究瓦斯抽采孔周不同破碎程度的煤体渗透特性,采用连续级配法制备不同粒径区间的煤颗粒组合试样,开展不同Talbol幂指数n的三轴渗透试验,分析有效应力对破碎煤样孔隙... 详细信息

瓦斯抽采钻孔孔周煤体的应力变化是影响其渗透特性的重要因素之一。为研究瓦斯抽采孔周不同破碎程度的煤体渗透特性,采用连续级配法制备不同粒径区间的煤颗粒组合试样,开展不同Talbol幂指数n的三轴渗透试验,分析有效应力对破碎煤样孔隙结构和渗透特性的影响。结果表明:在加载过程中,轴向应力通过改变破碎煤体孔隙率从而影响渗透率,其随轴向应力升高呈幂指数降低。加载初期,轴向应力升高使得煤样体积压缩,其内部空隙闭合,引起孔隙率减小及渗透作用减弱,导致渗透率降低。当轴向应力加载到孔隙率趋于0.1时,煤样内部密实使得渗透率趋于稳定;破碎煤体Talbol幂指数n从0.1到1.0增大的过程中,渗透率k呈现出缓慢、线性、指数3个增长阶段,分别受低级粒径、粒径比例、高级粒径的影响。渗流速度受Talbol幂指数、压力梯度、围压和轴向应力的共同影响,但压力梯度的作用更为显著,表现出Talbol幂指数和压力梯度越大,围压和轴向应力越小,渗流速度越大,存在渗流速度的Talbol幂指数促进效应和渗流速度的轴向应力及围压抑制效应;有效应力能较好地表征渗流速度的轴向应力及围压抑制效应,不同Talbol幂指数的破碎煤体渗透率随着有效应力的增大总体上呈指数衰减,但Talbol幂指数增大对渗透率的促进作用逐步减弱,而有效应力对渗透率的抑制作用和幅值效应逐渐强化。有效应力与渗透率的关系方程参数变化存在与渗透率曲线对应的3个阶段。随着Talbol幂指数n增大,关系方程参数a逐渐减小,有效应力的抑制作用增强;而b逐渐增大,幅值效应逐渐强化。

关键词：连续级配渗透特性有效应力渗透率轴向应力

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汽轮机转子冷态启动过程的温度场和热应力研究

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化工设备与管道 2024年第1期61卷 63-69页

作者：董洪潮曹敏朱雷杨世华吴辉贤杭州中能透平机械装备股份有限公司杭州310018

对汽轮机转子的冷态启动过程进行分析,编制对流换热系数计算程序并建立转子二维轴对称模型,应用有限元法模拟了转子冷态启动过程中的瞬态温度场和应力场,得到了转子温度场和应力场分布以及随时间的变化规律。通过对不同温升率下转子的... 详细信息

对汽轮机转子的冷态启动过程进行分析,编制对流换热系数计算程序并建立转子二维轴对称模型,应用有限元法模拟了转子冷态启动过程中的瞬态温度场和应力场,得到了转子温度场和应力场分布以及随时间的变化规律。通过对不同温升率下转子的应力场计算以及寿命损耗分析,得出了合理的温升率数值,优化了机组启动曲线,对汽轮机的长期安全运行具有实际意义。

关键词：汽轮机转子冷态启动温度场应力场

基于成本效益分析的发电厂汽轮机升级改造研究

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中国高新科技 2024年第15期 100-102页

作者：杨世华陈晶晶马利杭州中能透平机械装备股份有限公司浙江杭州310018

文章旨在研究发电厂汽轮机升级改造的成本效益分析,通过对比改造前后的成本投入与效益产出,评估汽轮机升级改造的经济价值及其对发电厂运行效率和环境影响的改善程度。分析了发电厂汽轮机升级改造的必要性,包括提高发电效率、降低能源... 详细信息

文章旨在研究发电厂汽轮机升级改造的成本效益分析,通过对比改造前后的成本投入与效益产出,评估汽轮机升级改造的经济价值及其对发电厂运行效率和环境影响的改善程度。分析了发电厂汽轮机升级改造的必要性,包括提高发电效率、降低能源消耗、减少排放等;详细阐述了汽轮机升级改造的技术路线和实施方案,并对改造前后的性能参数进行了对比分析;进行了成本效益分析,并提出了相应的建议。

关键词：成本效益发电厂汽轮机升级改造通流改造能源消耗

An extended state observer with adjustable bandwidth for measurement noise

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Journal of Systems Engineering and Electronics 2024年第1期35卷 233-241页

作者： ZHANG shihua QI Xiaohui yang Sen Shijiazhuang Campus Army Engineering University of PLAShijiazhuang 050053China

In this paper,a bandwidth-adjustable extended state observer(ABESO)is proposed for the systems with measurement *** is known that increasing the bandwidth of the observer improves the tracking speed but tolerates noise,which conflicts with observation ***,we introduce a bandwidth scaling factor such that ABESO is formulated to a 2-degree-of-freedom *** observer gain is determined and the bandwidth scaling factor adjusts the bandwidth according to the tracking *** the tracking error decreases,the bandwidth decreases to suppress the noise,otherwise the bandwidth does not *** is proven that the error dynamics are bounded and converge in finite *** relationship between the upper bound of the estimation error and the scaling factor is *** the scaling factor is less than 1,the ABESO has higher estimation accuracy than the linear extended state observer(LESO).Simulations of an uncertain nonlinear system with compound disturbances show that the proposed ABESO can successfully estimate the total disturbance in noisy *** mean error of total disturbance of ABESO is 15.28% lower than that of LESO.

关键词： extended state observer(ESO) boundedness and convergence adjustable bandwidth measurement noise

ORYZA SATIVA SPOTTED-LEAF 41(OsSPL41) Negatively Regulates Plant Immunity in Rice

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Rice science 2023年第5期30卷 426-436,I0017-I0020页

作者： TAN Jingyi ZHANG Xiaobo SHANG Huihui LI Panpan WANG Zhonghao LIAO Xinwei XU Xia yang shihua GONG Junyi WU Jianli State Key Laboratory of Rice Biology and Breeding China National Rice Research InstituteHangzhou 310006China

Identification of immunity-associated leucine-rich repeat receptor-like protein kinases(LRR-RLK) is critical to elucidate the LRR-RLK mediated mechanism of plant ***,we reported the map-based cloning of a novel rice SPOTTED-LEAF 41(Os SPL41) encoding a putative LRR-RLK protein(Os LRR-RLK41/Os SPL41) that regulated disease responses to the bacterial blight pathogen Xanthomonas oryzae ***(Xoo).An 8-bp insertion at position 865 bp in a mutant spotted-leaf 41(spl41) allele led to the formation of purple-brown lesions on *** complementation by the wild type allele(Os SPL41) can rescue the mutant phenotype,and the complementary lines showed similar performance to wild type in a number of agronomic,physiological and molecular *** SPL41 was constitutively expressed in all tissues tested,and Os SPL41 contains a typical transmembrane domain critical for its localization to the cell *** mutant exhibited an enhanced level of resistance to Xoo in companion of markedly up-regulated expression of pathogenesis-related genes such as Os PR10a,Os PAL1 and Os NPR1,while the level of salicylic acid was significantly increased in *** contrast,the over-expression lines exhibited a reduced level of H_(2)O_(2) and were much susceptible to Xoo with down-regulated expression of pathogenesis-related *** results suggested that Os SPL41 might negatively regulate plant immunity through the salicylic acid signaling pathway in rice.

关键词： bacterial blight leucine-rich repeat receptor-like protein kinase plant immunity reactive oxygen species rice spotted leaf

Mapping and Functional Analysis of LE Gene in a Lethal Etiolated Rice Mutant at Seedling Stage

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Rice science 2023年第6期30卷 567-576页

作者： XIA Xiaodong ZHANG Xiaobo WANG Zhonghao CHENG Benyi Sun Huifeng XU Xia GONG Junyi yang shihua WU Jianli SHI Yongfeng XU Rugen College of Agronomy Yangzhou UniversityYangzhou 225009China China National Rice Research Institute Hangzhou 310006China Agro-Tech Extension Center of Haiyan County Jiaxing 314300China

An EMS(ethy methanesulfonate)-induced lethal etiolated(le)mutant obtained from the rice variety Zhongjian 100 was characterized by lethal etiolated phenotypes,with significantly reduced levels of chlorophyll a,chlorophyll b,total chlorophyll,and ***,the mutant displayed a significantly decreased number of chloroplast grana,along with irregular and less-stacked grana *** le mutant showed markedly diminished root length,root surface area,and root volume compared with the wild *** also exhibited significantly lower catalase activity and total protein content,while peroxidase activity was significantly *** the map-based cloning method,we successfully mapped the LE gene to a 48-kb interval between markers RM16107 and RM16110 on rice chromosome 3.A mutation(from T to C)was identified at nucleotide position 692 bp of LOC_Os03g59640(ChlD),resulting in a change from leucine to *** crossing HM133(a pale green mutant with a single-base substitution of A for G in exon 10 of ChlD subunit)with a heterozygous line of le(LEle),we obtained two plant lines heterozygous at both the LE and HM133 *** 15 transgenic plants,3 complementation lines displayed normal leaf color with significantly higher total chlorophyll,chlorophyll a,and chlorophyll b *** mutation in le led to a lethal etiolated phenotype,which has not been observed in other ChlD *** mutation in the AAA+domain of ChlD disrupted the interaction of ChlDle with ChlI as demonstrated by a yeast two-hybrid assay,leading to the loss of ChlD function and hindering chlorophyll synthesis and chloroplast ***,this disruption is responsible for the lethal etiolated phenotype in the mutant.

关键词： Oryza sativa lethal etiolated mutant gene cloning functional analysis reactive oxygen species

Recurrent Neural Network Inspired Finite-Time Control Design

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IEEE/CAA Journal of Automatica Sinica 2024年第6期11卷 1527-1529页

作者： Jianan Liu shihua Li Rongjie Liu School of Automation Southeast UniversityNanjing 210096China Department of Statistics Florida State UniversityFL 32304 USA IEEE

Dear Editor,This letter is concerned with the role of recurrent neural networks(RNNs)on the controller design for a class of nonlinear *** by the architectures of RNNs,the system states are stacked according to the dynamic along with time while the controller is represented as the neural network *** build the bridge between RNNs and finite-time controller,a novel activation function is imposed on RNNs to drive the convergence of states at finite-time and propel the overall control process *** stability proof is briefly provided for the convergence of the proposed finite-time *** last,a numerical simulation example is presented to illustrate the efficiency of the proposed *** networks can be classified as static(feedforward)and dynamic(recurrent)nets[1].The former nets do not perform well in dealing with training data and using any information of the local data structure[2].In contrast to the feedforward neural networks,RNNs are constituted by high dimensional hidden states with dynamics.

关键词： dynamics finite proof