Mode-C运行与控制模式设计技术研究

本文基于运行与控制模式设计,结合核电厂的运行需求,针对国内压水堆核电厂以基负荷运行方式为主、负荷跟踪运行需求较少的特点,首次开展了与之适应的Mode-C运行与控制模式设计。通过控制策略设计、控制棒设置设计、核电厂运行方式设计、核电厂运行范围设计等设计步骤,研究Mode-C运行与控制模式的设计技术。结果表明:采用Mode-C模式的压水堆核电厂能根据负荷变化需求选择执行单变量自动控制模式或双变量自动控制模式,实现了设定的控制策略,Mode-C运行与控制模式的设计技术在反应堆物理专业方面是可行的。

数字技术赋能PBL教学模式创新研究——以C语言程序设计课程为例

本文以C语言程序设计课程为例,探讨了数字技术如何赋能以问题为导向的学习(Problem-Based Learning,PBL)的教学模式创新。鉴于C语言程序设计课程在建设过程中,存在课程内容与思政内容融合不紧密、课程与数字技术结合实效性不强等问题,文章提出了PBL教学模式创新的目标,包括改革教学内容,将价值观的引导作为核心,将能力的提升作为主线,改革教学模式,通过理论教学与实践操作的有机结合,实现教学与育人的相互融合,文章阐述了课程思政融入教学内容、重构教学设计和调整课程评价等实践的过程。实践证明,此模式提高了学习效率,实现了个性化教学,增强了学生参与度,培养了学生自主学习能力和解决问题的能力,加强了学生的实践技能,增强了其团队合作精神。

A New Method of Wind Turbine Bearing Fault Diagnosis Based on Multi-Masking Empirical Mode Decomposition and Fuzzy C-Means Clustering

Based on Multi-Masking Empirical Mode Decomposition (MMEMD) and fuzzy c-means (FCM) clustering, a new method of wind turbine bearing fault diagnosis FCM-MMEMD is proposed, which can determine the fault accurately and timely. First, FCM clustering is employed to classify the data into different clusters, which helps to estimate whether there is a fault and how many fault types there are. If fault signals exist, the fault vibration signals are then demodulated and decomposed into different frequency bands by MMEMD in order to be analyzed further. In order to overcome the mode mixing defect of empirical mode decomposition (EMD), a novel method called MMEMD is proposed. It is an improvement to masking empirical mode decomposition (MEMD). By adding multi-masking signals to the signals to be decomposed in different levels, it can restrain low-frequency components from mixing in highfrequency components effectively in the sifting process and then suppress the mode mixing. It has the advantages of easy implementation and strong ability of suppressing modal mixing. The fault type is determined by Hilbert envelope finally. The results of simulation signal decomposition showed the high performance of MMEMD. Experiments of bearing fault diagnosis in wind turbine bearing fault diagnosis proved the validity and high accuracy of the new method.

C波段50mW多注速调管高频系统的设计

本文提出一种全新的、应用于C波段50 mW高功率多注速调管输出系统。该系统首次采用TM 310高次模式多注结构,将整管工作电压由单注的354 kV大幅降低至250 kV,整管长度由单注的1.4 m缩短至0.9 m;并创新性地采用矩形TM 310结构,结合输出波导补偿结构,有效地解决了圆形TM 310结构外品质数不足的问题,保证了整管的输出稳定性。本文提出的C波段50 mW多注速调管能大幅降低整管工作电压、减小体积,可大幅提高系统的可靠性及机动性。本文研究的新型结构C波段50 mW多注速调管高频系统有效解决了高次模式高功率稳定输出的问题,降低了输出结构的设计复杂性、减小了传输系统体积并降低了成本,对未来多注高峰值功率产品的设计具有非常重要的意义。

ENSO combination mode and its influence on seasonal precipitation over southern China simulated by ECHAM5/MPI-OM

Recent studies show that a combination mode (C-mode) represents the seasonally modulated dynamics of ENSO, which plays an important role in maintaining the western North Pacific anomalous anticyclone. This C-mode could obviously influence the East Asian climate, especially since the contribution of ENSO to southern China's precipitation has weakened since the late 1990s. This paper evaluates whether the C-mode and its influences on precipitation over southern China can be realistically described by the climate model ECHAM5/MPI-OM. The authors find that the model is able to reproduce the spatial and temporal variability of the C-mode and the asymmetric responses of air-sea variations in the tropical Pacific. The model also reveals the observed significant effects of the C-mode on the wintertime and springtime rainfall over southern China during El Nino events. The findings have implications for ECHAM5/MPI-OM being a valuable tool for simulating and predicting the C-mode-related seasonal precipitation over southern China.

Eco-civilization construction practice mode: An international comparative study

This paper is devoted to the analysis and comparison of eco-civilization construction modes in China and major developed western countries, which mainly focuses on the typical advanced related ecocivilization construction modes in different countries, cities or counties. Finally, it makes a comparative analysis at home and abroad, draws the conclusion and puts forward some main countermeasures and suggestions for China's eco-civilization construction on the basis of the existing research.

Research on The Teaching Reform of Computer C Language under The Mode of MOOC

Computer C language is a high-level language,and also the basis for students to learn computer courses.A great deal ofknowledge point and practice point have greatly increased the difficulty for students to learn.However,today under the development of networktechnology, the formation of the mode of MOOC has caused the reform of original education mode to a greater extent,this not only effectivelyalleviate the difficulties of students in learning C language,but also enhance the teaching efficiency of C language.

Method to Realize TT&C of Spacecraft In-Orbit from Ground-Based to Space-Ground-Based Mode

Currently, TT&C of spacecraft is performed by a ground system. Because more and more spacecrafts are launched into orbits, it is difficult for the ground system to meet the TT&C requirements of the spacecrafts. To explore a new, effective and economical TT&C mode is absolutely necessary. A method is proposed to use SGBM mode in TT&C spacecrafts in low earth orbits, here. Firstly, the principle of the mode is discussed; secondly, the system to simulate the mode is designed; thirdly, the relative issues to use the mode are indicated; fourthly, the experimental results (simulation) to apply the mode to TT&C spacecrafts are analyzed; and finally dawn is the main conclusion of the method.

多元化课程考核在C语言课程中的改革与实践

为更好地实现人才教育的全面发展目标,促进C语言教学质量提升和课程持续发展,C语言教学团队基于雨课堂、智慧树网、头歌、学习通和考试系统等智慧教学平台,对C语言课程进行多元化的课程考核改革,形成了课前、课中、课后教学过程全覆盖的多元化课程考核评价方式,较为全面真实地评价了学生在课程学习全过程的综合表现,同时有效激发了学生对C语言课程学习的兴趣和积极性,为学习后续信息技术类课程打下了坚实的基础。

Study on the Self-supporting Logistics Mode based on B2C E-commerce Enterprises

Taking B2C E-commerce enterprises as the center, it can be divided into a set of logistics activities upstream supply chain logistics producer to B2C e-commerce enterprises, and the B2C e-commerce enterprise logistics to client consumer, and the paper focuses on the study of self-supporting logistics for the E-commerce enterprise. According to the development status of current B2C electronic commerce enterprise in our country and logistics, the paper study B2C electric business enterprise how to correctly choose the logistics mode and how to promote the business logistics operation level.

C^3-Mode^(TM)——领先的超声对比造影成像技术

C3 -ModeTM技术是目前最先进的造影剂成像技术 ,它不仅提取了造影剂二次谐波信息 (2fo) ,还同时提取了次谐波 1/ 2fo和基波fo频段的回波信号。因此得到的图像是造影剂在组织内敏感性好、分辨率高的空间分布图。

Assumption of E-commerce Platform of Agricultural Products Based on F2C2B Mode

This paper proposes the assumption of E-commerce platform of the agricultural products based on the F2C2B mode. The whole e-commerce model is guided by the idea of the supply chain management from the perspective of the modern system, and the e-commerce integration model from customer to supplier is implemented, and the whole is optimized. E-commerce to cloud computing as the basic environment, the construction of public cloud services and private cloud resources, based on public cloud to the SaaS way to provide services to customers, focus on business search and business collaboration, make full use of the lnternet, modern communications technology to provide the real- service. The development of agricultural economy, no longer depends only on the number of some traditional agricultural resources, but also depends on the modern technology, information access and use. Through the development of basic network technology, by virtue of some modern electronic information technology and some other means that can improve the intelligence of agricultural use of the information resources, the proposed model provides the new methodology of the solution.

基于医院感染预警系统的江西省某三甲医院就诊患者HCV微消除模式探索及评价

目的探索并评价江西省某综合医院就诊患者丙型肝炎病毒(HCV)微消除模式,为省内制定消除HCV公共健康危害策略提供参考依据。方法收集该院2021年1月—2022年12月就诊并进行HCV筛查的住院患者相关数据,其中2021年为基线数据,2022年为HCV微消除模式运行数据,分析其性别、年龄、送检科室、抗-HCV阳性率、HCV-RNA阳性率等指标,以专科就诊率、治疗率、失访率分析其运行效果,以SWOT-AHP法定量评价模式发展。结果2021—2022年共有397744例住院患者进行抗-HCV筛查,男女性别比为1.34∶1,平均年龄为54岁,送检科室主要以感染科/消化科为主。62份患者标本HCV基因亚型分型主要以1b亚型(43份)为主,其次为6亚型(9份)。模式运行后首次HCV预警率为81.20%,预警后抗-HCV送检率达93.15%,后续弹窗预警抗-HCV送检率为100%。与2021年比较,2022年HCV住院患者治疗率上升,差异有统计学意义(P<0.05);而专科就诊率、患者失访率差异均无统计学意义(均P>0.05)。模式运行重心坐标计算P(X,Y)=(0.0182,0.0069),位于第一象限。结论江西省某综合医院就诊患者HCV微消除模式可行且成效明显,下一步模式优化应重视SO策略(依靠内部优势,利用外部机会)。

基于AVMD与DPC-FCM的旋转机械无监督故障诊断方法

目的 针对旋转机械故障诊断过程中存在故障信号特征提取困难、故障诊断过程有标签数据较少、故障诊断准确率低等问题,提出自适应变分模态分解算法(Adaptive Variational Mode Decomposition,AVMD)与密度峰值算法优化的模糊C均值算法(Clustering by Fast Search and Find of Density Peaks Optimizing Fuzzy C-Means,DPC-FCM)结合的无监督诊断方法。方法 首先,将多尺度排列熵与峭度相结合的综合系数作为适应度函数,对VMD算法的惩罚因子alpha和模态个数K进行参数寻优,提取分解后本征模态函数(Intrinsic Mode Function,IMF)的平均样本熵与平均模糊熵,并输入至聚类算法中。其次,提出利用密度峰值聚类算法确定FCM的初始聚类中心,降低聚类结果的随机性。结果 将提出的无监督故障诊断模型应用到滚动轴承试验信号中,实现了准确的故障诊断。结论 AVMD在故障提取方面具有优越性,同时DPC算法可以有效提高FCM算法无监督聚类的准确性,二者结合可以有效实现旋转机械故障的智能分类。

Nth Order Voltage Mode Active-C Filter Employing Current Controlled Current Conveyor

This paper proposes an nth order (where n = 2,3, ,n) voltage mode active-C filter using n number of current controlled current conveyors (CCCIIs) and n number of equal valued grounded capacitors. The proposed topology can implement both band pass and low pass responses without alteration of any components. The filters offer the following important features: use of minimum number of current controlled current conveyors (CCCIIs) and passive components, no matching constraint, use of all grounded capacitors and absence of external resistor suitable for integration, cut off frequency can easily be electronically adjusted using AMS 0.35 μm CMOS technology. PSPICE simulation results of third order band pass and low pass responses are provided. The results are found to agree well with the theory.

Innovative Teaching Research on Literary Theory and Criticism

As a core compulsory course for English majors majoring in teacher education,Literary Theory and Criticism plays an important role in enhancing text understanding,cultivating critical thinking,and shaping correct values in the future development of students.Influenced by traditional teaching ideas,students have many difficulties when learning this course,such as insufficient theoretical understanding,inadequate ability improvement,and not enough investment in course learning.In response to the above issues,this course focuses closely on the fundamental task of“cultivating virtue and nurturing people”,relying on modern information technology and introducing research methods of digital humanities.This course uses“7C”teaching mode under the“three-level integration”,in which“teaching”and“education”are carried out synchronously,and“teacher”and“student”are developed together,in order to greatly enhance students’learning participation and course satisfaction.

基于VMD和FCM的火箭发动机涡轮泵状态监测方法

面向重复使用火箭发动机的状态监测与故障诊断需求,针对振动信号的非平稳性和难以提取有效故障特征的问题,提出一种基于变分模态分解(Variational Mode Decomposition, VMD)和模糊C均值聚类(Fuzzy C-Means, FCM)的状态监测方法。采用优化VMD算法自适应地将振动信号分解为多个本征模态分量(Intrinsic Mode Function, IMF),根据加权相关样本熵最大准则选取关键IMF分量;利用t分布随机近邻嵌入(t-SNE)对关键IMF分量的多维时域、频域特征降维,得到特征向量矩阵;利用模糊C均值聚类算法实现发动机工作状态的监测。将该方法应用于发动机涡轮泵工作状态监测,结果表明其能够提取振动信号关键特征,准确识别涡轮泵工作状态,测试集识别准确率达92.50%,为火箭发动机状态监测与故障诊断提供了理论支撑。

萧氏双C护理模式对行输液港置入术乳腺癌患者遵医行为及生命质量的影响

目的探究萧氏双C护理模式对行输液港置入术乳腺癌患者遵医行为、生命质量的影响。方法选取2020年10月至2021年10月于上海市东方医院吉安医院进行输液港置入术的100例乳腺癌患者作为研究对象,采用完全随机法分为对照组与萧氏双C组,各50例。对照组行常规干预,萧氏双C组行萧氏双C护理模式。比较两组视觉模拟评分法(VAS)、抑郁自评量表(SDS)、焦虑自评量表(SAS)、自我感受负担评分表(SPB)、Piper疲乏自我评估修订量表(PFS-R)、简易版疾病感知问卷(B-IPQ)、简易应对方式问卷(SCSQ)、乳腺癌生命质量评测量表中文版(FACT-B)、自我护理能力测定量表(ESCA)评分及遵医率、并发症发生率及家属满意率。结果干预后,萧氏双C组VAS、SDS、SAS、SPB、消极应对、PFS-R评分均低于对照组,B-IPQ、积极应对、希望水平、FACT-B、自我管理效能、ESCA评分均高于对照组,差异有统计学意义(P<0.05)。萧氏双C组并发症发生率低于对照组,遵医率、家属满意率均高于对照组,差异有统计学意义(P<0.05)。结论使用萧氏双C护理模式对行输液港置入术乳腺癌患者进行干预,能减轻患者疼痛、自我感受负担、癌因性疲乏,改善患者心理情绪,提升患者疾病感知能力、疾病应对方式、希望水平、生命质量、自我管理效能及自护能力,患者家属更加满意。

混合式教学模式在“C语言程序设计”课程中的应用研究

本研究以“C语言程序设计”课程为例介绍了在高职院校中开展混合式教学模式的必要性,通过采用信息化教学手段丰富教学模式,包括教材、教学资源、教学活动、评价机制,逐层递进并不断深化;通过充分引用案例分析,将课程思政融入教学实践中,以激发学生的学习热情情怀,进而探索出一种适合C语言程序设计课程的混合式教学模式,并在教学实践中进行验证,从而更好地培养具备匠心、匠技的高素质技术技能人才。

基于B/S+C/S模式的防洪调度决策支持系统研究及其应用

阐述了我国流域防洪调度系统研究与应用的现状及存在的问题,提出基于B/S+C/S模式的防洪调度决策支持系统的解决方案.利用桥模式、保护代理模式和Hibernate等先进技术实现了系统设计并完成了系统开发,减少了用户界面、业务逻辑、权限管理和数据库几者之间的强耦合关系.较之目前广泛存在的重复开发、资源浪费现状,新方法不仅使两模式的成果得到最大程度的复用,还提高了系统的运行效率.该系统成功运用于辽浑太流域防洪调度决策支持系统,运行结果表明整个系统具有很强的可移植性、通用性与可扩展性.