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

梯级水电厂日竞价优化运行方式研究

水力发电学报 2004年第4期23卷 11-15页

作者：陈建春马光文王黎过夏明徐刚四川大学水电学院成都610065

研究竞价上网环境下的梯级水电厂日优化运行问题 ,建立了电网边际电价预测的线性移动自回归模型 ,在此基础上 ,提出了梯级水电厂日优化运行模型 ,并采用遗传算法求解。计算结果可作为梯级水电厂日前交易市场电价和电量申报的基础。

关键词：电力市场电价遗传算法

Swarm intention identification via dynamic distribution probability image

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2024年第10期37卷 380-392页

作者： Yinhan wang Jiang wang Shaoming HE Fei wang Qi wang School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China Institute of Computing Technology Chinese Academy of SciencesBeijing 100190China

In the realm of decision-making for defense and security applications,it is paramount to swiftly and accurately identify the intentions of incoming *** identification methods predominantly focus on single-target applications and overlook the perturbations introduced by measurement *** this study,we propose a novel concept:the Dynamic Distribution Probability(DDP)image,which is constructed using the estimated state and its covariance *** grayscale pixel value within the image signifies the probability of the presence of the agent within the *** proposed identification scheme integrates the use of Extended Kalman Filter(EKF),Convolutional Neural Network(CNN),Back Propagation(BP)network,and Gated Recurrent Unit(GRU)***,the DDP image is processed through a CNN to distill the formation characteristics,and the estimated swarm state from EKF is inputted into a BP network to deduce the kinematic *** outputs from both networks are summed and subsequently channeled into a GRU network to capture temporal *** numerical simulations and flight experiments are presented to demonstrate the robust anti-noise capability of the proposed scheme compared with conventional methods,as well as its superior training efficiency.

关键词： Intention Identification Kalman filters Convolutional neural networks Swarm intelligence

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

关于弗洛伊德与皮亚杰心理发展观的比较分析

心理学探新 2001年第4期21卷 7-11页

作者：宋广文王云强曲阜师范大学教育科学学院曲阜273165

弗洛伊德和皮亚杰都是心理学的大师 ,他们关于心理发展的阶段、过程、结构等方面的思想既有关联 ,也存在不同。揭示两位大师心理观的关联和异同不仅有助于认清心理学思想的发展逻辑 ,而且对心理学理论的建构和研究也有裨益。

关键词：弗洛伊德皮亚杰心理发展观比较分析人格结构认知结构

在线全文

学校读者我要写书评

暂无评论

纤维素衍生手性分离材料的制备及其应用

材料导报 2008年第S2期22卷 402-404页

作者：马正伟刘炳刘雪民王光文新疆大学机械工程学院

合成了纤维素-三(3,5-二甲基苯基氨基甲酸酯)衍生物,将此衍生物涂敷在氨丙基球形硅胶上,制备了一种具有手性分离能力的手性固定相。采用此固定相对两种手性化合物进行拆分,并对极性添加剂的影响和相应对映体的圆二色光谱的分析以及旋光... 详细信息

合成了纤维素-三(3,5-二甲基苯基氨基甲酸酯)衍生物,将此衍生物涂敷在氨丙基球形硅胶上,制备了一种具有手性分离能力的手性固定相。采用此固定相对两种手性化合物进行拆分,并对极性添加剂的影响和相应对映体的圆二色光谱的分析以及旋光值的测定进行了研究。结果表明:此固定相对此类化合物有较强的手性识别能力,使样品基线分离,具有较大的分离度。

关键词：高效液相色谱手性固定相对映体分离

The reformation of catalyst:From a trial-and-error synthesis to rational design

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第4期17卷 3261-3301页

作者： Ligang wang Jiabin Wu Shunwu wang Huan Liu Yao wang Dingsheng wang Department of Chemistry Tsinghua UniversityBeijing 100084China

The appropriate catalysts can accelerate the reaction rate and effectively boost the efficient conversion of various molecules,which is of great importance in the study of chemistry,chemical industry,energy,materials and environmental ***,efficient,environmentally friendly,and easy to operate synthesis methods have been used to prepare various types of *** previous studies have reported the synthesis and characterization of the aforementioned catalysts,more still remain in trial and error methods,without in-depth consideration and improvement of traditional synthesis ***,we comprehensively summarize and compare the preparation methods of the trial-and-error synthesis strategy,structure–activity relationships and density functional theory(DFT)guided catalysts rational design for nanomaterials and atomically dispersed *** also discuss in detail the utilization of the nanomaterials and single atom catalysts for converting small molecules(H_(2)O,O_(2),CO_(2),N_(2),etc.)into value-added products driven by electrocatalysis,photocatalysis,and ***,the challenges and outlooks of mass preparation and production of efficient and green catalysts through conventional trial and error synthesis and DFT theory are featured in accordance with its current development.

关键词： trial-and-error synthesis structure–activity relationships density functional theory(DFT)guidance nanomaterials atomically dispersed catalysts

高中文理分科及学生认知方式对阅读理解影响的实验研究

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

心理学探新 2003年第1期23卷 21-25页

作者：宋广文王晓明曲阜师范大学教育科学学院曲阜273165

以高中二年级学生为被试 ,探讨文理分科、不同认知方式的学生对不同体裁文章及对文章不同信息加工层次的学习效果的影响。结果表明 ,(1)文理分科、学生认知方式对学生阅读成绩的影响不显著 ;(2 )从总体上看 ,学生对不同体裁的文章学习... 详细信息

以高中二年级学生为被试 ,探讨文理分科、不同认知方式的学生对不同体裁文章及对文章不同信息加工层次的学习效果的影响。结果表明 ,(1)文理分科、学生认知方式对学生阅读成绩的影响不显著 ;(2 )从总体上看 ,学生对不同体裁的文章学习效果不同 ,对说明文的学习明显优于对散文的学习 ;在文章不同信息的加工层次上 ,学生对细节的记忆优于对结构的把握 ;(3)对于不同体裁的文章 ,学生在信息加工层次上存在差异 ,对散文的细节记忆好于对结构的把握。

关键词：高中生文理科认知方式阅读

Numerical Analysis of PRISM-PY Calculations for Hard-and Soft-Core Generic Polymer Models

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2024年第4期42卷 532-543页

作者： Qiang wang Department of Chemical and Biological Engineering Colorado State University1370 Campus DeliveryFort CollinsCO80523-1370USA

Generic polymer models capturing the chain connectivity and excluded-volume interactions between polymer segments can be classified, according to whether or not the 3D integral of the latter diverges, into hard- and soft-core models. Taking homogeneous systems of compressible homopolymer melts (or equivalently homopolymer solutions in an implicit, good solvent) in the continuum as an example, we recently compared the correlation effects on the structural and thermodynamic properties of the hard- and soft-core models given by the polymer reference interaction site model (PRISM) theory with the Percus-Yevick (PY) closure (Polymers 2023, 15, 1180). Here we analyzed in detail the numerical errors and behavior of the interchain pair correlation functions (PCFs) given by the PRISM-PY calculations of these models using an efficient numerical approach that we proposed. Our numerical approach has the least number of independent variables to be iteratively solved, analytically treats the discontinuities caused by the non-bonded pair potential (such as that of the hard spheres) and takes only the inverse Fourier transform of the interchain indirect PCF between polymer segments (which is continuous and decays towards 0 with increasing wavenumber much faster than both the interchain direct and total PCFs), and is essential for us to accurately solve the PRISM-PY theory for chain length N as large as 106. To capture the correlation-hole effect, the real-space cut-off in the PRISM calculations should be proportional to the square root of N.

关键词： Generic polymer models Soft potentials Polymer reference interaction site model theory

Linear-Quadratic Pareto Cooperative Game for Mean-Field Backward Stochastic System

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2024年第3期37卷 947-964页

作者： wang Yu School of Control Science and Engineering Shandong UniversityJinan 250061China

This paper focuses on a Pareto cooperative differential game with a linear mean-field backward stochastic system and a quadratic form cost functional. Based on a weighted sum optimality method, the Pareto game is equivalently converted to an optimal control problem. In the first place,the feedback form of Pareto optimal strategy is derived by virtue of decoupling technology, which is represented by four Riccati equations, a mean-field forward stochastic differential equation(MF-FSDE),and a mean-field backward stochastic differential equation(MF-BSDE). In addition, the corresponding Pareto optimal solution is further obtained. Finally, the author solves a problem in mathematical finance to illustrate the application of the theoretical results.

关键词： Backward stochastic differential equation linear-quadratic control mean-field Pareto optimality

在线全文

学校读者我要写书评

暂无评论

民用飞机座舱二氧化碳气体浓度分析研究

民用飞机设计与研究 2014年第4期 43-44,68页

作者：杨智汪光文上海飞机设计研究院上海201210

对民用飞机座舱CO_2气体浓度进行了分析研究,阐述了民用飞机CO_2气体浓度的相关要求、计算模型,同时利用该模型对某型民用飞机未满载时座舱CO_2气体浓度进行了计算,并与试验结果进行了对比,验证了计算模型的正确性。之后利用该模型计算... 详细信息

对民用飞机座舱CO_2气体浓度进行了分析研究,阐述了民用飞机CO_2气体浓度的相关要求、计算模型,同时利用该模型对某型民用飞机未满载时座舱CO_2气体浓度进行了计算,并与试验结果进行了对比,验证了计算模型的正确性。之后利用该模型计算了某型民用飞机满载时座舱CO_2气体浓度,以表明某型民用飞机座舱CO_2气体浓度对相关要求的符合性。

关键词：二氧化碳模型座舱民用飞机