检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

国外数字游戏长期保存的研究进展

图书情报工作 2019年第21期63卷 137-144页

作者：张静文武汉大学信息管理学院

[目的/意义]通过分析国外数字游戏长期保存的研究进展,为我国发展数字游戏长期保存提供借鉴。[方法/过程]以文献调研为基础,对所得文献的研究内容从数字游戏保存的内容、数字游戏的法律问题、数字游戏长期保存的技术和各界对数字游戏长... 详细信息

[目的/意义]通过分析国外数字游戏长期保存的研究进展,为我国发展数字游戏长期保存提供借鉴。[方法/过程]以文献调研为基础,对所得文献的研究内容从数字游戏保存的内容、数字游戏的法律问题、数字游戏长期保存的技术和各界对数字游戏长期保存的态度4个主题进行总结分析。[结果/结论]国外数字游戏长期保存存在4个特点:研究主体范围广,但是研究人数少;技术研究多以项目的形式呈现,研究项目大多受到研究机构/计划资助;研究方法多样;不同研究主题的研究程度不均衡,未形成完整的体系。我国可以从中获得的3个方面的启示:全面调研我国数字游戏保存的现状;加强理论研究,夯实理论基础;加强各界合作,参与国际合作。

关键词：数字游戏数字资源长期保存

在线全文

学校读者我要写书评

暂无评论

双箱体间窄缝水体共振的形线约束插值法求解

哈尔滨工程大学学报 2019年第1期40卷 54-60页

作者：何广华张婧文张德贺哈尔滨工业大学(威海)船舶与海洋工程学院山东威海264209

针对波浪与存在窄缝的两箱体的相互作用问题,本文基于约束插值剖面(CIP)方法,建立了二维强非线性不可压缩粘性流数值波浪水槽。在验证了该数值水槽模型的造波性能后,对不同入射频率波浪作用下的窄缝处的波面抬高、浮体所受的波浪力进行... 详细信息

针对波浪与存在窄缝的两箱体的相互作用问题,本文基于约束插值剖面(CIP)方法,建立了二维强非线性不可压缩粘性流数值波浪水槽。在验证了该数值水槽模型的造波性能后,对不同入射频率波浪作用下的窄缝处的波面抬高、浮体所受的波浪力进行了计算和分析,并详细对比分析了共振频率与非共振频率处的流场分布及浮体受力的不同。实验结果表明:本CIP粘流模型可以较为精确地计算两箱体间窄缝处的水动力共振现象。两箱体受到的水平力大于垂向力,而在共振发生时水平力的急剧增大是由于窄缝中液面的急剧抬升从而造成浮体两侧的液面差较大造成的。

关键词：约束插值剖面方法共振粘性两箱体窄缝数值水槽二维水动力

Regulating the expression of bradyzoite specific genes in Toxoplasma gondii by AP2 transcription factors

在线全文

学校读者我要写书评

暂无评论

Regulating the expression of bradyzoite specific genes in To...

Experimental demonstration of 220-GHz terahertz signals wireless transmission over 4.6 km

中国畜牧兽医学会兽医寄生虫学分会第一届青年科学家学术论坛

作者： jingwen zhang Lihong zhang Yanqin Zhou Junlong Zhao Bang Shen State key Laboratory of Agricultural Microbiology College of Veterinary MedicineHuazhong Agricultural University

A uniqueaspect of Toxoplasma gondii biology is its ability to interconvert between fast replicating tachyzoites and slowly growing bradyzoites,which are responsible for the acute and chronic stages of Toxoplasma infection *** interconversion is key for the transmission and pathogenesis of the *** very little in known about the underlying mechanisms that control this *** this study,we first purified nuclear proteins from tachyzoites and alkaline-induced *** proteomic comparisons identified a number of nuclear proteins that showed abundance difference between those two stages Subsequently we focused on a previously uncharacterized AP2 family transcription factor TgAP2 XII-5,whose transcription was increased at the bradyzoite ***2 XII-5 disruption had no discernible effect on tachyzoite replication but did resulted in a significant growth defect of *** addition,loss of AP2 XII-5 also resulted in a modest attenuation of parasite virulence,which was restored by ***-PCR and RNA-seq analyses indicated that AP2 XII-5 was involved in the regulation of gene expression in *** the bradyzoite specific marker LDH2 as a model,we showed that recombinant the AP2 domain of TgAP2 XII-5 was able to specifically bind to the promoter region of *** together,these results illuminated the roles of TgAP2 XII-5 in regulating bradyzoite gene expression and parasite virulence.

关键词： Toxoplasma gondii gene expression differentiation AP2 virulence

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2025年第1期68卷 386-388页

作者： Yi WEI Jianjun YU Mingxu WANG Xiongwei YANG Qiutong zhang jingwen TAN Bing zhang Ying WU Yang HAN Peng TIAN Wen ZHOU Kaihui WANG Feng ZHAO State Key Laboratory of ASIC and System Key Laboratory for Information Science of Electromagnetic Waves (MoE)School of Information Science and Technology Fudan University School of Electronic Engineering Xi'an University of Posts and Telecommunications

The advancement of terahertz (THz) communication technology drives the evolution of wireless communication systems,offering novel pathways and technical means for the development of future 6G communication *** wireless communication systems are often constrained by bandwidth limitations of electronic devices in high frequency ***,THz communication technology leverages the characteristics of electromagnetic waves to transcend these limitations,enabling communication athigher frequencies and wider bandwidths.

关键词：

同方期刊数据库

In Situ Electrochemical Transmission Electron Microscopy for Sodium-Ion Batteries

在线全文

学校读者我要写书评

暂无评论

Renewables 2023年第1期1卷 57-72页

作者： Shuge Dai jingwen zhang Jiaqi Qu Xing Li Shaobo Cheng Chongxin Shan Key Laboratory of Material Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450000

Sodium-ion batteries(SIBs)possess promising application prospects for large-scale energy storage systems due to the abundance of sodium ions as a resource and their low *** of advanced SIBs requires a clear understanding of the structures and kinetic/dynamic processes occurring in the cells during the charging/discharging *** situ transmission electron microscopy(TEM)is a powerful tool for direct visualization of the phase transitions as well as morphological and structural evolutions of the electrodes during the electrochemical reaction ***,we summarize the state-of-the-art in situ TEM studies on SIBs with a specific focus on real-time observations of the electrochemical behavior of battery *** review emphasizes the necessity of in situ TEM to elucidate fundamental issues regarding the reaction mechanism,phase transformation,structural evolution,and performance degradation of ***,critical challenges and emerging opportunities for in situ TEM research about SIBs are discussed.

关键词： in situ transmission electron microscopy sodiumion batteries electrode interfaces reaction mechanism

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

近地空间与电网相关的谐波辐射现象研究

电工技术学报 2023年第11期38卷 2861-2869页

作者：张敬雯吴静谢天宇北京航空航天大学自动化科学与电气工程学院北京100191

大量卫星探测结果表明近地空间存在与地面电网谐波频率一致的辐射现象,但相应的谐波辐射源仍不确定。通过分析与晋东南—南阳—荆门特高压交流输电工程走向接近的DEMETER卫星轨道上的电场强度探测数据,发现空间存在2~5 kHz频带内的谐波... 详细信息

大量卫星探测结果表明近地空间存在与地面电网谐波频率一致的辐射现象,但相应的谐波辐射源仍不确定。通过分析与晋东南—南阳—荆门特高压交流输电工程走向接近的DEMETER卫星轨道上的电场强度探测数据,发现空间存在2~5 kHz频带内的谐波辐射事件,且事件的数量在该特高压输电工程投入运行后急剧增加。地面实测结果表明,特高压输电工程首端确实存在数千赫兹的谐波辐射。利用偶极子等效地面谐波辐射源,基于全波模型,分析了其产生的电磁波在半球空间电离层中的传播特点,并与卫星探测结果进行了对比,表明近地空间谐波辐射现象与地面变电站的谐波辐射具有一定关联。此外研究了甚低频(VLF)电网谐波辐射在南北地磁共轭空间传播的机理,并利用卫星探测实例进行了初步验证。

关键词：特高压电网谐波辐射近地空间卫星探测

Copper‐doped zinc sulfide nanoframes with three‐dimensional photocatalytic surfaces for enhanced solar driven H_(2) production

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Catalysis 2022年第3期43卷 782-792页

作者： Junmin Huang Jianmin Chen Wangxi Liu jingwen zhang Junying Chen Yingwei Li State Key Laboratory of Pulp and Paper Engineering School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640GuangdongChina

Solar‐to‐chemical energy conversion is perceived as one of the most potential solutions to the current energy and environmental crisis,yet requires major scientific endeavors on the development of efficient and sustainable *** the composition and morphology of a semiconductor jointly for the purpose of improving photocatalysis efficiency remains ***,we rationally fabricated Cu‐doped ZnS nanoframes via a simple conjunct strategy of substitutional doping,chemical acidic etching,and sulfidation,aiming at enhancing the light utilization and charge separation/transfer efficiency for solar‐light‐driven hydrogen ***‐doped zeolitic imidazolate framework‐8(ZIF‐8)rhombic dodecahedrons are transformed to hollow Cu‐ZIF‐8 nanoframes converted to Cu‐ZnS nanoframes with three‐dimensional photocatalytic active surfaces via anisotropic chemical etching,which is further converted to Cu‐ZnS *** combining the merits of optimal heteroatom doping and frame‐like open architecture,the obtained 1%Cu‐doped ZnS nanoframe exhibits high photocatalytic activity under solar light irradiation with improved hydrogen production rate up to 8.30 mmol h^(–1) g^(–1) and excellent stability in the absence of cocatalysts,which is significantly improved in comparison with those of the bare ZnS and Cu‐ZnS with different *** work inspired by merging the merits of metal doping and anisotropic chemical etching may shed light on the rational design and fabrication of advanced photocatalysts.

关键词： Metal‐organic frameworks Solar‐to‐chemical energy conversion Metal sulfides Hydrogen production Photocatalysis

改进粒子群算法在管道密封性能预测中的应用研究

在线全文

学校读者我要写书评

暂无评论

化工设备与管道 2023年第6期60卷 106-113页

作者：张静文重庆科创职业学院重庆402160

管道密封性能对工业流体传输系统的可靠性至关重要。文章介绍了一种改进的粒子群优化算法(IPSO),用于预测管道密封性能。IPSO算法结合了粒子群算法和新的非线性递减惯性权重策略,以提高速度和位置更新速度,同时引入了遗传交叉算子以增... 详细信息

管道密封性能对工业流体传输系统的可靠性至关重要。文章介绍了一种改进的粒子群优化算法(IPSO),用于预测管道密封性能。IPSO算法结合了粒子群算法和新的非线性递减惯性权重策略,以提高速度和位置更新速度,同时引入了遗传交叉算子以增加多样性。IPSO算法优化了神经网络的权重和阈值,创建了IPSO-BPNN模型。该模型在两个管道数据集上的测试结果显示出色,MAE为0.5154、0.7085,MAPE为3.76%、2.67%,RMSE为0.6726、0.9472。与LR、FEA、BPNN以及PSO-BPNN模型相比,IPSO-BPNN模型的预测性能更佳。这种改进的粒子群算法显著提高了管道密封性能的预测准确性,为管道检查提供更精确的依据。

关键词：管道密封性能预测模型粒子群算法神经网络

Staged dendrite suppression for high safe and stable lithium-sulfur batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 674-683页

作者： Jun Jiang Zhenjie Lu Yanwen Ding Shujun Liu Zhijie Qi Tian Tang Yunfan zhang Zhiyuan Ma jingwen Sun Liang Xue Wenyao zhang Pan Xiong Xin Wang Junwu Zhu Yongsheng Fu Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education Nanjing University of Science and Technology Jiangsu Pylon Battery Co.Ltd

The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur ***,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene （PP） *** uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition *** importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance（145.88 MPa） of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium *** Li||Li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 mA cm-2with a polarization voltage of only 29.3 ***,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity *** improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 C,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关键词： Ductility