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粉末制品液压机液压系统的研究与设计——二通插装阀在液压机上的应用

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重庆三峡学院学报 2014年第3期30卷 57-63页

作者：成晓军王悦善重庆三峡职业学院重庆万州404100 重庆三峡学院重庆万州404100

二通插装阀是20世纪末出现在世界发达国家中采用的新型对液压机控制技术的一种先进的逻辑控制方式.二通插装阀运用于逻辑控制阀,主要通过控制插入元件的开启、关闭和开启量的大小来控制油液的通断、压力的高低和流量的大小,以实现对执... 详细信息

二通插装阀是20世纪末出现在世界发达国家中采用的新型对液压机控制技术的一种先进的逻辑控制方式.二通插装阀运用于逻辑控制阀,主要通过控制插入元件的开启、关闭和开启量的大小来控制油液的通断、压力的高低和流量的大小,以实现对执行机构的方向、压力和速度的控制.并以粉末制品液压机的半自动工作程序:电机启动、顶出缸顶出、中心缸顶出、滑块快下、滑块慢下、压制、保压、卸压、滑块回程、顶出缸退回、中心缸退回、停机为例,说明二通插装阀在各个工作程序中的动作.

关键词：二通插装阀液压系统应用研究

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肝脏放线菌病误诊为原发性肝癌

中华消化外科杂志 2018年第5期17卷 520-521页

作者：曹恒冯宁宁张越山王顺祥河北医科大学第四医院肝胆外科石家庄050019

1临床资料患者男，41岁。因右季肋区隐痛不适半年入院。患者半年前无明显诱因出现右季肋区隐痛不适。久坐后明显，无放射性疼痛。无恶心、呕吐，无发热、寒战，肝胆胰B超检查未见异常。近1个月来患者疼痛感加重，10d前复查B超：肝右叶... 详细信息

1临床资料患者男，41岁。因右季肋区隐痛不适半年入院。患者半年前无明显诱因出现右季肋区隐痛不适。久坐后明显，无放射性疼痛。无恶心、呕吐，无发热、寒战，肝胆胰B超检查未见异常。近1个月来患者疼痛感加重，10d前复查B超：肝右叶占位性病变，呈低回声。MRI检查：肝右叶占位性病变合并肝硬化。脾脏肿大。患者为进一步治疗转入我院。

关键词：肝肿瘤肝脏放线菌病误诊

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框剪结构中剪力墙的设计

林业科技情报 2006年第2期38卷 25-25,27页

作者：宋德友王悦山黑龙江省林业设计研究院黑龙江省天林路桥工程公司

探讨了在框剪结构中剪力墙的厚度、数量及长度的确定,从剪力墙的平面、竖向布置方面,阐述了剪力墙的布置。

关键词：结构体系框架剪力墙

散度型椭圆方程的解在Morrey空间上的细正则性

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数学年刊（A辑） 2006年第4期27卷 551-560页

作者：王月山中国工程物理研究院北京研究生部

对具有不连续系数的散度型椭圆方程-(aijuxi)xj=(fj)xj的解在Morrey空间中的细正则性进行了研究,即如果aij∈VMO∩L∞(Ω),fj∈Lp,λ(Ω),u∈W1,q(Ω)(1

关键词：椭圆方程 Morrey空间细正则性 VMO空间

Swarm intention identification via dynamic distribution probability image

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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

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

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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

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

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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

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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

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与薛定谔算子相关的一类积分变换

焦作大学学报 2022年第4期36卷 62-64页

作者：何月香王月山焦作大学基础教学部河南焦作 454000

假设R^(n)(n≥3)上的薛定谔型算子L=-∆+V中的非负位势函数V属于反向Hölder类RH_(s),s≥n/2,对j=1,…,n,定义积分变换μ^(L)_(j)(f)(x)=(∫^(∞)_(0)|∫_(|x-y|≤t) K^(L)_(j)(x,y)f(y)dy|^(2)dt/t^(3))^(1/2),这里K^(L)_(j)(x,y)=K^(L)_(j)(x,y)|x-y|,K^(L)_(j)(x,y)是Riesz变换ə/əxjL^(1/2)的核函数。证明了积分变换μ^(L)_(j)在L^(p)(R^(n))空间上的有界性。

关键词：薛定谔算子反向Hölder类 Riesz变换