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Journal of Central South University 2024年第8期31卷 2872-2890页

作者： WANG Meng GUO Ping-ye JIN Xin dang guan-jie GUO Yi-chen LI Yi State Key Laboratory for Tunnel Engineering China University of Mining and Technology-BeijingBeijing 100083China School of Mechanics and Civil Engineering China University of Mining and Technology-BeijingBeijing 100083China

Every year in China,a significant number of mines are closed or *** pumped hydroelectric storage(PHS)and geothermal utilization are vital means to efficiently repurpose resources in abandoned *** this work,the development potentials of the PHS and geothermal utilization systems were *** the geological conditions and meteorological data available of Jiahe abandoned mine,a simple evaluation model for PHS and geothermal utilization was *** average efficiency of the PHS system exceeds 70%and the regulatable energy of a unit volume is over 1.53 kW·h/m^(3).The PHS system achieves optimal performance when the wind/solar power ratio reaches 0.6 and 0.3 in daily and year scale,*** the geothermal utilization system,the outlet temperature and heat production are significantly affected by the injection flow *** heat production performance is more stable at lower rate flow,and the proportion of heat production is higher in the initial stage at greater flow *** the operating time increases,the proportion of heat production gradually *** cyclic heat storage status has obvious advantages in heat generation and ***,the energy-saving and emission reduction benefits of PHS and geothermal utilization systems were calculated.

关键词： abandoned mine underground reservoir wind/solar energy pumped hydroelectric storage geothermal

Viscosity and structure relationship with equimolar substitution of CaO with MgO in the CaO–MgO–Al_(2)O_(3)–SiO_(2)slag melts

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 70-79页

作者： Yong Hou Shuo Zhang jie dang Jia Guo Hanghang Zhou Xuewei Lü College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing UniversityChongqing 400044China

Currently,the Al_(2)O_(3)content in the high-alumina slag systems within blast furnaces is generally limited to 16wt%–18.5wt%,making it challenging to overcome this *** most studies that concentrated on managing the MgO/Al_(2)O_(3)ratio or basicity,this paper explored the effect of equimolar substitution of MgO for CaO on the viscosity and structure of a high-alumina CaO-MgO-Al_(2)O_(3)-SiO_(2)slag system,providing theoretical guidance and data to facilitate the application of high-alumina *** results revealed that the viscosity first decreased and then increased with higher MgO substitution,reaching a minimum at 15mol%MgO *** transform infrared spectroscopy(FTIR)results found that the depths of the troughs representing[SiO_(4)]tetrahedra,[AlO_(4)]tetrahedra,and Si-O-Al bending became progressively deeper with increased MgO *** of the Raman spectra showed that the average number of bridging oxygens per Si atom and the X_(Q^(3))/X_(Q^(2))(X_(Q^(i))is the molar fraction of Q^(i) unit,and i is the number of bridging oxygens in a[SiO_(4)]tetrahedral unit)ratio increased from 2.30 and 1.02 to 2.52 and 2.14,respectively,indicating a progressive polymerization of the silicate structure.X-ray photoelectron spectroscopy(XPS)results highlighted that non-bridging oxygen content decreased from 77.97mol% to 63.41mol% with increasing MgO concentration,whereas bridging oxygen and free oxygen contents *** analysis demonstrated a gradual increase in the polymerization degree of the tetrahedral structure with the increase in MgO ***,bond strength is another important factor affecting the slag *** occurrence of a viscosity minimum can be attributed to the complex evolution of bond strengths of non-bridging oxygens generated during depolymerization of the[SiO_(4)]and[AlO_(4)]tetrahedral structures by CaO and MgO.

关键词： aluminosilicate viscosity structure spectroscopy

Energy saving by using asymmetric aftbodies for merchant ships–design methodology, numerical simulation and validation

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Journal of Hydrodynamics 2016年第6期28卷 1022-1028页

作者： jie dang 陈灏 Maritime Research Institute Netherlands (MARIN) Wageningen The Netherlands guangzhou Shipyard International Company Ltd. Guangzhou 510382 China

The methodology and procedures are discussed on designing merchant ships to achieve fully-integrated and optimized hull-propulsion systems by using asymmetric aftbodies. Computational fluid dynamics （CFD） has been used to evaluate the powering performance through massive calculations with automatic deformation algorisms for the hull forms and the propeller blades. Comparative model tests of the designs to the optimized symmetric hull forms have been carried out to verify the efficiency gain. More than 6% improvement on the propulsive efficiency of an oil tanker has been measured during the model tests. Dedicated sea-trials show good agreement with the predicted performance from the test results.

关键词： energy saving hull form asymmetric aftbody model tests sea trials

DQN-based decentralized multi-agent JSAP resource allocation for UAV swarm communication

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Journal of Systems Engineering and Electronics 2023年第2期34卷 289-298页

作者： LI jie dang Xiaoyu LI Sai College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China

It is essential to maximize capacity while satisfying the transmission time delay of unmanned aerial vehicle(UAV)swarm communication *** order to address this challenge,a dynamic decentralized optimization mechanism is presented for the realization of joint spectrum and power(JSAP)resource allocation based on deep Q-learning networks(DQNs).Each UAV to UAV(U2U)link is regarded as an agent that is capable of identifying the optimal spectrum and power to communicate with one *** convolutional neural network,target network,and experience replay are adopted while *** findings of the simulation indicate that the proposed method has the potential to improve both communication capacity and probability of successful data transmission when compared with random centralized assignment and multichannel access methods.

关键词： joint spectrum and power(JSAP) unmanned aerial vehicle(UAV)swarm communication deep Q-learning network(DQN) UAV to UAV(U2U)

L^(2) Extension and Effectiveness of L^(p) Strong Openness Property

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Acta Mathematica Sinica,English Series 2023年第5期39卷 814-826页

作者： Shi jie BAO Qi An guan School of Mathematical Sciences Peking UniversityBeijing 100871P.R.China

In this note,we present an L^(2) extension approach to the effectiveness result of L^(P) strong openness property of multiplier ideal sheaves.

关键词： Optimal L^(2)extension multiplier ideal sheaf L^(P)strong openness property

L^(2)Extension and Effectiveness of Strong Openness Property

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Acta Mathematica Sinica,English Series 2022年第11期38卷 1949-1964页

作者： Shi jie BAO Qi An guan School of Mathematical Sciences Peking UniversityBeijing 100871P.R.China

In this note,we present an L^(2)extension approach to the effectiveness result of strong openness property of multiplier ideal sheaves.

关键词： Optimal L^(2)extension multiplier ideal sheaf strong openness property

Thermoelectric performance of Xl_(2)(X=Ge,Sn,Pb)bilayers

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Chinese Physics B 2022年第4期31卷 608-615页

作者： Nan Lu jie guan School of Physics Southeast UniversityNanjing 211189China

We study the thermal and electronic transport properties as well as the thermoelectric(TE)performance of three two-dimensional(2 D)XI_(2)(X=Ge,Sn,Pb)bilayers using density functional theory and Boltzmann transport *** compared the lattice thermal conductivity,electrical conductivity,Seebeck coefficient,and dimensionless figure of merit(ZT)for the XI_(2)monolayers and *** results show that the lattice thermal conductivity at room temperature for the bilayers is as low as~1.1 W·m^(-1)·K^(-1)-1.7 W·m^(-1)·K^(-1),which is about 1.6 times as large as the monolayers for all the three *** structure calculations show that all the XI_(2)bilayers are indirect-gap semiconductors with the band gap values between 1.84 eV and 1.96 eV at PBE level,which is similar as the corresponding *** calculated results of ZT show that the bilayer structures display much less direction-dependent TE efficiency and have much larger n-type ZT values compared with the *** dramatic difference between the monolayer and bilayer indicates that the inter-layer interaction plays an important role in the TE performance of XI_(2),which provides the tunability on their TE characteristics.

关键词： 2D group-Ⅳdiiodide thermoelectric materials bilayers

Real-time state recovery attack against MORUS in nonce-misuse setting

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Science China(Information Sciences) 2019年第3期62卷 214-216页

作者： Tairong SHI jie guan Information Science and Technology Institute

Dear editor,CAESAR [1] is a large-scale cryptographic competition supported by the US National Institute of Standards and Technology, which mainly calls for authenticated ciphers. MORUS [2], an authenticated stream ci... 详细信息

关键词： Real-time state recovery attack against MORUS in nonce-misuse setting Si Pi

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三角梅主要品种表型性状分析

热带作物学报 2025年第1期46卷 70-82页

作者：郝晓函关文灵李叶芳宋杰云南农业大学园林园艺学院云南昆明650201 云南省农业科学院花卉研究所/国家观赏园艺工程技术研究中心/云南省花卉育种重点实验室云南昆明650205 吉林省种子管理总站吉林长春130031

三角梅是我国南方重要的木本花卉,品种繁多,但分类比较混乱。本研究以云南引种保存的133个三角梅品种为研究对象,对133个品种的10个数量性状和41个质量性状进行频率分布统计、变异系数计算和多样性指数计算,并进行Q型聚类分析。结果表明... 详细信息

三角梅是我国南方重要的木本花卉,品种繁多,但分类比较混乱。本研究以云南引种保存的133个三角梅品种为研究对象,对133个品种的10个数量性状和41个质量性状进行频率分布统计、变异系数计算和多样性指数计算,并进行Q型聚类分析。结果表明:133个三角梅品种多个性状多样性丰富,数量性状的变异系数范围为19.61%~32.59%,平均值为26.64%,花序总梗长度、花被管宽度、叶柄长度、花序长度的变异系数最高,多样性指数范围为1.69~2.09,平均值为1.92,叶片长度、苞片宽度、叶片宽度、苞片长度的多样性指数最高。质量性状多样性指数为0.17~2.19,多样性指数大于1的质量性状有11个,苞片颜色、花被管颜色多样性指数均大于2,多样性丰富。4个种系的三角梅品种中,巴特三角梅数量性状的多样性指数最高,多样性最丰富,其次是秘鲁三角梅、光叶三角梅,毛叶三角梅的多样性指数最小,多样性较小,但不同种系各有优势性状。51个性状中,有22个性状在种系之间呈现出了显著差异性,此22个性状对三角梅品种识别和类群划分具有重要的参考价值。根据苞片类型、枝刺多少、叶片大小进行聚类,133个三角梅品种可聚为重瓣少刺、重瓣多刺、单瓣少刺小叶、单瓣多刺大叶4类。上述研究结果显示,供试133个三角梅品种的表型性状多样性较高,数量性状变异类型丰富,本研究可为三角梅种质资源的系统评价、品种分类和种质创新提供参考。

关键词：三角梅变异系数多样性分类指标

Ligand Engineering in Metal Nanoclusters: from Structural Control to Functional Modulation

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Chinese Journal of Structural Chemistry 2020年第7期39卷 1194-1200页

作者： guan Zong-jie WANG Quan-Ming Department of Chemistry Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of EducationTsinghua UniversityBeijing 100084China

Ligand-protected metal nanoclusters have drawn increasing research interest because of their unique physicochemical properties and practical *** efforts have been made in pursuing rational synthesis of metal nanoclusters and establishing the structure-property *** an indispensable part of ligand-protected metal nanoclusters,ligands play multiple roles in determining their structures and *** this perspective,we demonstrate the importance of ligand engineering in terms of the control of structures,optical and catalytic properties of metal ***,we will show that ligand engineering is prospective in structural design and preorganization of surface metal sites.

关键词： metal nanoclusters physicochemical properties structure-property relationship ligand engineering