检索结果-南通市图书馆

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

除铁器性能优化的结构设计与仿真分析

现代制造技术与装备 2024年第5期60卷 39-41页

作者：尹腾飞谭翼清湖南科美达电气股份有限公司岳阳414000

近年来,除铁器在工业生产和环境保护中起着至关重要的作用。为了提升除铁器的性能并满足实际应用需求,结构设计和仿真分析成为关注的焦点。文章旨在探讨除铁器性能优化的结构设计和仿真分析方法。首先,分析已有的除铁器结构,发现潜在的... 详细信息

近年来,除铁器在工业生产和环境保护中起着至关重要的作用。为了提升除铁器的性能并满足实际应用需求,结构设计和仿真分析成为关注的焦点。文章旨在探讨除铁器性能优化的结构设计和仿真分析方法。首先,分析已有的除铁器结构,发现潜在的改进空间,提出一种新型的结构设计,旨在提高除铁器的磁场分布均匀度和除铁效率。其次,设计除铁器装置磁路结构,确定磁场的设计指标、磁场尺寸材料和整体结构设计。最后,应用Workbench软件对除铁器装置进行有限元模拟结果分析,验证除铁器装置的性能。结果表明,新设计的除铁器除铁效果改善明显。相比传统除铁器,新设计的除铁器具有更均匀的磁场分布和更高的磁吸附效率,可以更有效地去除铁矿物。

关键词：除铁器性能优化结构设计仿真分析

Predictive value of N6-methyladenosine (m6A)-related genes for prognosis and correlation with tumor microenvironment in gastric cancer

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2022年第19期135卷 2360-2362页

作者： tengfei yin Lang Zhao Shukun Yao Graduate School Peking University China-Japan Friendship School of Clinical MedicineBejing 100029China Graduate Schol Peking Union Medical College and Chinese Academy of Medical SCciencesBeijing 100730China Department of Gastroenterology China-Japan Friendship HospitalBejing 100029China

To the Editor:Gastric cancer(GC)poses a great threat to human health worldwide.N6-methyladenosine(m6A)RNA methylation,the most abundant post-transcriptional RNA modification,plays a crucial role in RNA splicing,export,processing,translation,and *** The tumor microenvironment(TME),an aggregation of tumor cells and surrounding tumor-related non-tumor cells,innately modulates tumor progression,21However,the prognostic value of m6A regulator-related genes and their relationship with the TME have not been largely explored in *** aim of our study was to screen prognostic genes related to m6A modification in GC patients in The Cancer Genome Atlas(TCGA)database,establish an m6A regulatorassociated signature for predicting clinical outcome,and validate the performance in TCGA and Gene Expression Omnibus(GEO)*** relationship between m6A and immune infiltration was also assessed in *** the underlyingmechanismuncovered,m6A-relatedgenescould become predictive biomarkers for GC and provide deeper insights into the TME and immunotherapy.

关键词： cancer Gastric value

球磨机能耗和研磨效率离散元数值仿真设计优化

在线全文

学校读者我要写书评

暂无评论

水泥技术 2024年第5期 36-41页

作者：水沛范威谢传东殷腾飞合肥水泥研究设计院有限公司安徽合肥230051 中建材(合肥)粉体科技装备有限公司安徽合肥230051

球磨机是水泥粉磨系统中的关键性设备,基于离散元法和Rocky DEM软件,对球磨机运行时研磨介质和物料的运动过程进行了数值仿真,分析了球磨机转速、研磨介质材料属性、填充率、级配对物料颗粒运动状态和设备能耗的影响。研究表明,在不同... 详细信息

球磨机是水泥粉磨系统中的关键性设备,基于离散元法和Rocky DEM软件,对球磨机运行时研磨介质和物料的运动过程进行了数值仿真,分析了球磨机转速、研磨介质材料属性、填充率、级配对物料颗粒运动状态和设备能耗的影响。研究表明,在不同的物料特性和加工要求下,球磨机转速、研磨介质最佳填充率和级配各不相同;使用陶瓷球代替钢球可以明显降低球磨机能耗,研磨介质级配对球磨机能耗利用率的影响大于研磨介质材料属性,研磨介质的碰撞恢复系数对球磨机能耗利用率的影响大于研磨介质的密度。基于单因素分析和多目标优化设计方法,不仅可以改进球磨机研磨介质的材质和级配,还可以实现水泥粉磨系统的节能降耗。

关键词：球磨机数值仿真研磨介质参数优化节能降耗

A novel lead-free relaxor with endotaxial nanostructures for capacitive energy storage

在线全文

学校读者我要写书评

暂无评论

SusMat 2024年第1期4卷 116-125页

作者： Xiaoyan Dong tengfei Hu XiaojunWu Jie yin Zhengqian Fu Jiagang Wu College of Materials Science and Engineering Sichuan UniversityChengduP.R.China Analysis and Testing Center for Inorganic Materials Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiP.R.China

Dielectric capacitors with a fast charging/discharging rate,high power density,and long-term stability are essential components in modern electrical ***,miniaturizing and integrating capacitors face a persistent challenge in improving their energy density(W_(rec))to satisfy the specifications of advanced electronic systems and *** this work,leveraging phase-field simulations,we judiciously designed a novel lead-free relaxor ferroelectric material for enhanced energy storage performance,featuring flexible distributed weakly polar endotaxial nanostructures(ENs)embedded within a strongly polar fluctuation *** matrix contributes to substantially enhanced polarization under an external electric field,and the randomly dispersed ENs effectively optimize breakdown phase proportion and provide a strong restoring force,which are advantageous in bolstering breakdown strength and minimizing ***,this relaxor ferroelectric system incorporating ENs achieves an exceptionally high W_(rec)value of 10.3 J/cm^(3),accompanied by a large energy storage efficiency(η)of 85.4%.This work introduces a promising avenue for designing new relaxor materials capable of capacitive energy storage with exceptional performance characteristics.

关键词： endotaxial nanostructure energy storage lead-free relaxor ferroelectric

Intelligent Power Grid Load Transferring Based on Safe Action-Correction Reinforcement Learning

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy Engineering 2024年第6期121卷 1697-1711页

作者： Fuju Zhou Li Li tengfei Jia Yongchang yin Aixiang Shi Shengrong Xu Suqian Power Supply Branch State Grid Jiangsu Electric Power Co.Ltd.Suqian223800China

When a line failure occurs in a power grid, a load transfer is implemented to reconfigure the network by changingthe states of tie-switches and load demands. Computation speed is one of the major performance indicators inpower grid load transfer, as a fast load transfer model can greatly reduce the economic loss of post-fault powergrids. In this study, a reinforcement learning method is developed based on a deep deterministic policy *** tedious training process of the reinforcement learning model can be conducted offline, so the model showssatisfactory performance in real-time operation, indicating that it is suitable for fast load transfer. Consideringthat the reinforcement learning model performs poorly in satisfying safety constraints, a safe action-correctionframework is proposed to modify the learning model. In the framework, the action of load shedding is correctedaccording to sensitivity analysis results under a small discrete increment so as to match the constraints of line flowlimits. The results of case studies indicate that the proposed method is practical for fast and safe power grid loadtransfer.

关键词： Load transfer reinforcement learning electrical power grid safety constraints

EchinocandinB微生物转化工艺优化

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国医药工业杂志 2012年第5期43卷 333-336页

作者：尹腾飞陈少欣中国医药工业研究总院上海医院工业研究院创新药物与制药工艺国家重点实验室上海200040

犹他游动放线菌产生的酰基水解酶可以将echinocandin B(ECB)水解脱去酰基侧链得到ECB母核,用于化学合成抗真菌药阿尼芬净。本研究考察并优化了犹他游动放线菌产酶的发酵培养基组分和ECB转化反应体系的有机溶剂、底物浓度,建立了ECB的微... 详细信息

犹他游动放线菌产生的酰基水解酶可以将echinocandin B(ECB)水解脱去酰基侧链得到ECB母核,用于化学合成抗真菌药阿尼芬净。本研究考察并优化了犹他游动放线菌产酶的发酵培养基组分和ECB转化反应体系的有机溶剂、底物浓度,建立了ECB的微生物转化工艺。结果表明,在含麦芽糖30 g/L和麦芽浸粉20 g/L的发酵培养基中,犹他游动放线菌发酵培养72 h后,加入终浓度为2.55 g/L的ECB和7.5%甲醇,转化18 h,ECB的转化率为97.8%。进一步在5 L发酵罐中进行发酵培养和微生物转化,结果表明该微生物转化工艺可用于制备ECB母核。

关键词： echinocandin B echinocandin B母核犹他游动放线菌酰基水解酶微生物转化

在线全文

学校读者我要写书评

暂无评论

基于铣削动力学的刀具强迫振动抑制研究

机械工程学报 2018年第17期54卷 94-99页

作者：张洁刘成颖郑烽尹腾飞清华大学机械工程系北京100084 清华大学精密超精密制造装备及控制北京市重点实验室北京100084 电子科技大学机械电子工程学院成都611731

铣削是实现高速、高性能金属切削加工最主要的形式,其稳定性、加工精度和加工质量一直是研究的热点。针对柔性双自由度铣削工艺系统,建立了时滞微分动力学模型,模型中的铣削力包含基于刚体运动学的静态切削力成分和基于再生效应的动态... 详细信息

铣削是实现高速、高性能金属切削加工最主要的形式,其稳定性、加工精度和加工质量一直是研究的热点。针对柔性双自由度铣削工艺系统,建立了时滞微分动力学模型,模型中的铣削力包含基于刚体运动学的静态切削力成分和基于再生效应的动态切削力成分,并通过全离散法预测了无颤振工艺参数区域。在保证了稳定加工的前提下,在频域内求解了由于断续切削引起的刀齿周期性强迫振动轨迹,利用表面位置误差和最大高度表面粗糙度评价加工精度与质量。理论和试验表明,在刀齿通过频率决定的共振转速下往往能获得较大的无颤振极限切深,而相邻两个共振转速的中间区域虽可避免共振,但较容易发生颤振。通过合理选择工艺参数,可以避免颤振的发生和实现对强迫振动的抑制。

关键词：铣削动力学颤振强迫振动抑制

From spatio-temporal landslide susceptibility to landslide risk forecast

在线全文

学校读者我要写书评

暂无评论

Geoscience Frontiers 2024年第2期15卷 220-235页

作者： tengfei Wang Ashok Dahal Zhice Fang Cees van Westen Kunlong yin Luigi Lombardo Faculty of Engineering China University of GeosciencesWuhan 430074China Faculty of Geo-Information Science and Earth Observation(ITC) University of TwenteEnschedeAE 7500Netherlands Institute of Geophysics and Geomatics China University of GeosciencesWuhan 430074China

The literature on landslide susceptibility is rich with examples that span a wide range of ***,the component that pertains to the extension of the susceptibility framework toward space–time modeling is largely *** statement holds true,particularly in the context of landslide risk,where few scientific contributions investigate risk dynamics in space and *** manuscript proposes a modeling protocol where a dynamic landslide susceptibility is obtained via a binomial Generalized Additive Model whose inventories span nine years(from 2013 to 2021).For the analyses,the data cube is organized with a mapping unit consisting of 26,333 slope units repeated over an annual temporal unit,resulting in a total of 236,997 *** phase already includes several interesting modeling experiments that have rarely appeared in the landslide literature(e.g.,variable interaction plots).However,the main innovative effort is in the subsequent phase of the protocol we propose,as we used climate projections of the main trigger(rainfall)to obtain future estimates of yearly susceptibility *** estimates are then combined with projections of urban settlements and associated populations to create a dynamic risk model,assuming vulnerability=***,this manuscript presents a unique example of such a modeling routine and offers a potential standard for administrations to make informed decisions regarding future urban development.

关键词： Space-time statistics Dynamic landslide susceptibility Landslide risk Future projections

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

我国煤炭产业生命周期阶段识别及其峰值

工业技术经济 2015年第4期34卷 44-50页

作者：殷腾飞王立杰中国矿业大学(北京) 北京100083

本文在产业生命周期理论的基础上,分析了4个典型国家煤炭产业的生命周期发展规律,并以此为支撑,运用皮尔生长曲线模型对我国煤炭产业生命周期进行拟合分析,得出4种峰值方案,以及相应的拐点时间和饱和时间,并解读了不同的方案的合理性。... 详细信息

本文在产业生命周期理论的基础上,分析了4个典型国家煤炭产业的生命周期发展规律,并以此为支撑,运用皮尔生长曲线模型对我国煤炭产业生命周期进行拟合分析,得出4种峰值方案,以及相应的拐点时间和饱和时间,并解读了不同的方案的合理性。我国煤炭产业在经历了高速发展期之后,出现了一些新的产业特征,预判我国煤炭产业生命周期阶段及峰值对于我国煤炭产业的可持续发展具有重要意义。

关键词：产业生命周期煤炭产业生长曲线峰值