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Materials Futures 2024年第2期3卷 1-35页

作者： Lixiu Zhang Yousheng Wang Xiangchuan Meng Jia Zhang Pengfei Wu Min Wang Fengren Cao Chunhao Chen Zhaokui Wang Fu yang Xiaodong Li Yu Zou Xi Jin Yan Jiang Hengyue Li Yucheng Liu Tongle Bu Buyi Yan Yaowen Li Junfeng Fang Lixin Xiao Junliang yang Fuzhi Huang Shengzhong Liu Jizhong Yao liangsheng Liao liang Li Fei Zhang Yiqiang Zhan Yiwang Chen Yaohua Mai Liming ding Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190People’s Republic of China Institute of New Energy Technology College of Information Science and TechnologyJinan UniversityGuangzhou 510632People’s Republic of China Institute of Polymers and Energy Chemistry(IPEC) Nanchang UniversityNanchang 330031People’s Republic of China School of Information Science and Technology Fudan UniversityShanghai 200433People’s Republic of China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072People’s Republic of China School of Physical Science and Technology Soochow UniversitySuzhou 215006People’s Republic of China Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123People’s Republic of China Institute of optoelectronics Fudan UniversityShanghai 200433People’s Republic of China College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123People’s Republic of China School of Physics and Electronic Science East China Normal UniversityShanghai 200241People’s Republic of China State Key Laboratory for Artificial Microstructure and Mesoscopic Physics Department of PhysicsPeking UniversityBeijing 100871People’s Republic of China College of Biophotonics South China Normal UniversityGuangzhou 510631People’s Republic of China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China School of Physics and Electronics Central South UniversityChangsha 410083People’s Republic of China School of Materials Science and Engineering Shaanxi Normal UniversityXi’an 710119People’s Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China Microquanta semiconductor Hangzhou 311121People’s Republic of China

Perovskite solar cells have aroused a worldwide research upsurge in recent years due to their soaring photovoltaic performance,ease of solution processing,and low *** power conversion efficiency record is constantly being broken and has recently reached 26.1%in the lab,which is comparable to the established photovoltaic technologies such as crystalline silicon,copper indium gallium selenide and cadmium telluride(CdTe)solar ***,perovskite solar cells are standing at the entrance of industrialization,where huge opportunities and risks ***,towards commercialization,challenges of up-scaling,stability and lead toxicity still remain,the proper handling of which could potentially lead to the widespread adoption of perovskite solar cells as a low-cost and efficient source of renewable *** review gives a holistic analysis of the path towards commercialization for perovskite solar cells.A comprehensive overview of the current state-of-the-art level for perovskite solar cells and modules will be introduced first,with respect to the module efficiency,stability and current status of *** will then discuss the challenges that get in the way of commercialization and the corresponding strategies to address them,involving the upscaling,the stability and the lead toxicity *** into the future direction of commercialization of perovskite photovoltaics was also provided,including the flexible perovskite cells and modules and perovskite indoor ***,the future perspectives towards commercialization are put forward.

关键词： commercializations perovskite solar cells state-of-the-art level challenges and perspectives indoor photovoltaics

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华南燕山期佛冈–南昆山花岗岩石成因:来自锆石微量元素、H_(2)O含量及Hf-O同位素的约束

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地球化学 2024年第3期53卷 426-444页

作者：蔡克鸿夏小平丁兴杨晴张乐中国科学院广州地球化学研究所同位素地球化学国家重点实验室广东广州510640 中国科学院深地科学卓越创新中心广东广州510640 中国科学院大学地球与行星科学学院北京100049

华南地区发育大规模与稀有金属成矿相关的燕山期花岗岩,其岩石类型与成因存在诸多争议,厘清这些争议有助于理解华南地区的成矿作用。锆石是花岗岩中常见的副矿物,具有非常稳定的物理化学性质,不容易受后期地质作用影响,可以很好地保存... 详细信息

华南地区发育大规模与稀有金属成矿相关的燕山期花岗岩,其岩石类型与成因存在诸多争议,厘清这些争议有助于理解华南地区的成矿作用。锆石是花岗岩中常见的副矿物,具有非常稳定的物理化学性质,不容易受后期地质作用影响,可以很好地保存其形成时母岩浆的地球化学信息,从而避免全岩地球化学分析的不足。本研究选取华南地区佛冈–南昆山花岗岩中的锆石进行LA-ICP-MS微量元素和Hf同位素研究,结合SIMS氧同位素和H_(2)O含量等数据,探讨佛冈岩体和南昆山岩体的岩石类型和成因。两个岩体的锆石都呈现LREE亏损、HREE富集、Eu负异常、Ce正异常,以及Zr/Hf>55、Eu/Eu~*>0.005、Hf含量低(<1.2%)等特点,明显不同于高分异I型花岗岩,指示母岩浆分异程度较低。同时,锆石的REE+Y与P含量之间的关系表明它们也不是S型花岗岩。佛冈岩体锆石较高的δ18O值(7.97‰~10.29‰)、富集的εHf(t)值(-13.6~-5.7)、较低的H_(2)O含量(核密度峰值317~412μg/g)以及较高的锆饱和温度(799~800℃)表明,佛冈花岗岩可能是源区有高比例沉积物加入的A型花岗岩。南昆山岩体也具有类似的、但变化范围更大的锆石δ18O值(6.34‰~11.11‰)、εHf(t)值(-11.1~1.1)和H_(2)O含量(297~1253μg/g)。锆石Hf-O同位素和H_(2)O含量分析结果显示,二者均具有壳幔混合的特点,其中南昆山花岗岩源区地幔物质加入比例更大。

关键词：花岗岩锆石微量元素 Hf-O同位素 H_(2)O含量壳幔混合

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Shaking Table Tests of Four-Bucket Jacket Foundation for Offshore Wind Turbines

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China Ocean Engineering 2022年第6期36卷 849-858页

作者： ding Hong-yan LI Jing-yi le cong-huan PAN Chen ZHANG Pu-yang State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China School of Civil Engineering Tianjin UniversityTianjin 300072China

As the offshore wind turbine foundation,the four-bucket jacket foundation has a large stiffness and the structure is difficult to be damaged under seismic ***,the saturated subsoil of the four-bucket jacket foundation tends to be liquefied under earthquake,which greatly affects the safety of offshore wind ***,the seismic performance of four-bucket jacket foundation is mainly reflected in the anti-liquefaction capacity of foundation *** this paper,the liquefaction resistance of sandy soil of four-bucket jacket foundation for offshore wind turbine is *** liquefaction and dynamic response of sandy soil foundation of four-bucket jacket foundation under seismic load are obtained by carrying out the shaking table test,and the influence mechanism of four-bucket jacket foundation on the liquefaction resistance of sandy soil foundation is analyzed.

关键词： four-bucket jacket foundation sand liquefaction shaking table test seismic response

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反映载荷影响的星球车车轮试验及模型研究

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机械工程学报 2024年第14期60卷 263-271页

作者：袁野杨怀广丁亮兰清宁杨超杰高海波邓宗全哈尔滨工业大学机器人技术及系统国家重点实验室哈尔滨150080

星球车在上下坡或以蠕动、抬轮等步态移动时,车轮的垂直载荷会发生明显变化,分析载荷对轮地相互作用的影响可以对星球车地面巡视任务提供支持。利用单轮测试台进行多种载荷情况下的单轮试验,得出车轮沉陷量、驱动阻力矩和挂钩牵引力随... 详细信息

星球车在上下坡或以蠕动、抬轮等步态移动时,车轮的垂直载荷会发生明显变化,分析载荷对轮地相互作用的影响可以对星球车地面巡视任务提供支持。利用单轮测试台进行多种载荷情况下的单轮试验,得出车轮沉陷量、驱动阻力矩和挂钩牵引力随垂直载荷的变化规律。以240 kg火星车六轮均载的近似载荷值160 N作为典型情况,采用基于泰勒级数和Sobol方差分解的解析方法分析轮地相互作用模型中各参数的灵敏度。结果表明,承压特性参数沉陷指数和剪切特性参数土壤内摩擦角具有较高的灵敏度。结合试验数据及各参数灵敏度,分析车轮载荷对轮地相互作用模型的影响,建立反映载荷影响的沉陷指数模型,该模型对试验数据的拟合优度可达0.99,对挂钩牵引力的估计误差大部分在±5 N以内,对车轮沉陷量的估计误差不超过3 mm。

关键词：地面力学载荷影响沉陷指数灵敏度分析星球车

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基于SM9标识密码算法的可否认环签名方案

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信息网络安全 2024年第6期24卷 893-902页

作者：丁勇罗世东杨昌松梁海桂林电子科技大学广西密码学与信息安全重点实验室桂林541004 桂林电子科技大学工业互联网安全与区块链广西工程研究中心桂林541004

可否认环签名是环签名的拓展,允许环成员无需依赖可信第三方的情况下,能够在必要时通过特定协议确认或者否认自己的签名行为。可否认环签名具有追踪性,兼顾了隐私保护和可控监管的需求。将可否认环签名技术与基于标识的密码体系相结合,... 详细信息

可否认环签名是环签名的拓展,允许环成员无需依赖可信第三方的情况下,能够在必要时通过特定协议确认或者否认自己的签名行为。可否认环签名具有追踪性,兼顾了隐私保护和可控监管的需求。将可否认环签名技术与基于标识的密码体系相结合,既能保留可否认环签名的主要特性,又能克服传统公钥基础设施下用户公钥和证书管理复杂的问题。文章基于SM9数字签名算法,提出一种身份标识的可否认环签名方案,能够实现对环签名的确认和否认,同时避免了公钥证书管理的问题。文章证明了所提方案在随机预言模型下满足正确性、不可伪造性、匿名性、可追踪性和不可诽谤性。通过模拟实验对通信和计算开销进行分析,所提方案仅需常数次的双线性配对操作,且在计算效率和通信成本方面均具有显著优势。

关键词： SM9 环签名可否认环签名基于身份标识

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A retrospective study of occlusal reconstruction in patients with old jaw fractures and dentition defects

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Chinese Journal of Traumatology 2024年第5期27卷 272-278页

作者： Ming-Chao ding Bo-Ya Jing Jin Shi Liu yang Xiang-Dong Liu Jing-Fu Wang Shuang Qu Jia-Wu liang Zi-Hao Tang Jin-Long Zhao lei Tian State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration National Clinical Research Center for Oral DiseasesShaanxi Clinical Research Center for OralDiseasesDepartment of Oral and MaxillofacialSchool of StomatologyThe Fourth Military Medical UniversityXi'an710032China Department of Maxillofacial Trauma and Orthognathic Surgery The Third Affiliated HospitalThe Air Force Military Medical UniversityXi'an710038China Department of Stomatology 941th Hospital of People's Liberation Army Joint Logistic Support ForceXining810000China

Purpose:This study evaluated the methods and clinical effects of multidisciplinary collaborative treatment for occlusal reconstruction in patients with old jaw fractures and dentition ***:Patients with old jaw fractures and dentition defects who underwent occlusal reconstruction at the Third Affiliated Hospital of Air Force Military Medical University from January 2018 to December 2022 were *** treatment was classified into 3 *** phase I,techniques such as orthognathic surgery,microsurgery,and distraction osteogenesis were employed to reconstruct the correct 3-dimensional(3D)jaw position *** phase II,bone augmentation and soft tissue management techniques were utilized to address insufficient alveolar bone mass and poor gingival soft tissue *** phase III,implant-supported overdentures or fixed dentures were used for occlusal reconstruction.A summary of treatment methods,clinical efficacy evaluation,comparative analysis of imageological examinations,and satisfaction questionnaire survey were utilized to evaluate the therapeutic efficacy in patients with traumatic old jaw fractures and dentition *** data are summarized using the arithmetic mean±standard deviation and compared using independent ***:In 15 patients with old jaw fractures and dentition defects(an average age of 32 years,ranging from 18 to 53 years),there were 7 cases of malocclusion of single maxillary fracture,6 of malocclusion of single mandible fracture,and 2 of malocclusion of both maxillary and mandible *** were 5 patients with single maxillary dentition defects,2 with single mandibular dentition defects,and 8 with both maxillary and mandibular dentition *** reconstruct the correct 3D jaw positional relationship,5 patients underwent le Fort I osteotomy of the maxilla,3 underwent bilateral sagittal split ramus osteotomy of the mandible,4 underwent open reduction and internal fixation for old jaw fracture

关键词： Old jaw fractures Malocclusion Occlusal reconstruction Dental implant prosthesis

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Study on Seepage Characteristics of Composite Bucket Foundation Under Eccentric Load

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China Ocean Engineering 2021年第1期35卷 123-134页

作者： CHEN Qing-shan ZHANG Pu-yang ding Hong-yan le cong-huan XU Yun-long State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China Key Laboratory of Coast Civil Structure Safety(Tianjin University) Ministry of EducationTianjin 300072China

Under the effect of eccentric loads,when the suction pressure of the composite bucket foundation is leveled,the seepage failure is very easy to *** seepage failure occurrence causes the foundation to settle unevenly and impairs the bearing *** study uses ABAQUS finite element software to establish a composite bucket foundation model for finite element *** model simulates the seepage of the foundation penetrating process under eccentric load to reveal the induced seepage characteristics of the bucket *** most vulnerable position of seepage failure under the eccentric loading is *** suction formulas for different offset eccentric moment strategies are derived and compared with existing literature *** the derived formula is supplemented and corrected according to the pressure difference between adjacent *** can be drawn:(1)Under eccentric loads,the critical suction decreases about 7%−10%.(2)The pressure difference between adjacent cabins impacts significantly on the seepage field,and the critical suction,at most,can be reduced by 17.56%.(3)the offset strategies have little effect on the seepage *** and appropriate strategies can be selected to meet the requirement of leveling in engineering project.

关键词： composite bucket foundation eccentric load seepage failure critical suction

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A Localization Method of High Energy Transients for All-sky Gamma-ray Monitor

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Research in Astronomy and Astrophysics 2024年第10期24卷 25-35页

作者： Yi Zhao Wangchen Xue Shaolin Xiong Qi Luo Yuanhao Wang Jiacong Liu Heng Yu Xiaoyun Zhao Yue Huang Jinyuan Liao jianchao Sun Xiaobo Li Qibin Yi Ce Cai Shuo Xiao Shenglun Xie Chao Zheng Yanqiu Zhang Chenwei Wang Wenjun Tan Zhiwei Guo Chaoyang Li Zhenghua An Gang Chen Yanqi Du Min Gao Ke Gong Dongya Guo Jiang He Jianjian He Bing Li Gang Li Xinqiao Li Jing liang Xiaohua liang Yaqing Liu Xiang Ma Rui Qiao Liming Song Xinying Song Xilei Sun Jin Wang Ping Wang Xiangyang Wen Hong Wu Yanbing Xu Sheng yang Dali Zhang Fan Zhang Hongmei Zhang Peng Zhang Shu Zhang Zhen Zhang Shijie Zheng Keke Zhang Xingbo Han Haiyan Wu Hu Tai Hao Geng Gaopeng Lu wei Xu Fanchao Lyu Hongbo Zhang Fangjun Lu Shuangnan Zhang Department of Astronomy Beijing Normal UniversityBeijing 100875China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China School of Physics and Optoelectronics Xiangtan UniversityXiangtan 411105China College of Physics Hebei Normal UniversityShijiazhuang 050024China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal UniversityGuiyang 550001China School of Physics and Electronic Science Guizhou Normal UniversityGuiyang 550001China Institute of Astrophysics Central China Normal UniversityWuhan 430079China College of physics Sciences Technology Hebei UniversityBaoding 071002China Physics and Space Science College China West Normal UniversityNanchong 637002China School of Computing and Artificial Intelligence Southwest Jiaotong UniversityChengdu 611756China College of Electronic and information Engineering Tongji UniversityShanghai 201804China Innovation Academy for Microsatellites of Chinese Academy of Sciences Shanghai 201304China National Space Science Center Chinese Academy of SciencesBeijing 100190China School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China Electronic Information School Wuhan UniversityWuhan 430072China Key Laboratory of Transportation Meteorology of China Meteorological Administration Nanjing Joint Institute for Atmospheric SciencesNanjing 210000China Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

Fast and reliable localization of high-energy transients is crucial for characterizing the burst properties and guiding the follow-up *** based on the relative counts of different detectors has been widely used for all-sky gamma-ray *** are two major methods for this count distribution localization:χ^(2)minimization method and the Bayesian *** we propose a modified Bayesian method that could take advantage of both the accuracy of the Bayesian method and the simplicity of the χ^(2)*** comprehensive simulations,we find that our Bayesian method with Poisson likelihood is generally more applicable for various bursts than the χ^(2)method,especially for weak *** further proposed a location-spectrum iteration approach based on the Bayesian inference,which could alleviate the problems caused by the spectral difference between the burst and location *** method is very suitable for scenarios with limited computation resources or timesensitive applications,such as in-flight localization software,and low-latency localization for rapidly follow-up observations.

关键词： methods:data analysis methods:analytical (stars:)gamma-ray burst:general

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基于SM9的分层标识广播内积函数加密

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中国科学：信息科学 2024年第6期54卷 1400-1418页

作者：李聪梁俊凯丁煜甲沈晴霓吴中海北京大学计算机学院北京100871 北京大学软件与微电子学院北京102600 软件工程国家工程研究中心(北京大学) 北京100871 北京大学–八分量区块链与隐私计算联合实验室(北京大学) 北京100871

内积函数加密支持当使用一个与向量y相关的私钥解密一份与向量x相关的密文时,解密者仅能获得内积值(x,y)而无法获取任何其他信息.分层广播内积函数加密,则进一步具有密文向指定用户广播与密钥授权的性质.SM9标识加密是我国自主设计的一... 详细信息

内积函数加密支持当使用一个与向量y相关的私钥解密一份与向量x相关的密文时,解密者仅能获得内积值(x,y)而无法获取任何其他信息.分层广播内积函数加密,则进一步具有密文向指定用户广播与密钥授权的性质.SM9标识加密是我国自主设计的一个商用密码标准,已被应用于物联网、医疗协同服务与电子政务等领域,但SM9标识加密算法及现有扩展算法均无法同时实现内积函数的功能与密文广播、密钥授权的性质,限制了SM9标识加密算法的适用场景.本文基于SM9标识加密算法设计了一个分层标识广播内积函数加密方案HIBB-IPFE-SM9.方案构造借鉴了Abdalla等的内积函数加密(PKC’15)与Liu等的分层广播加密(ACISP’14)的设计思想,解密算法仅包含两个双线性配对运算.本文还在随机谕言机模型中证明了方案满足选择明文安全性.最后,对提出方案与现有相关方案进行了对比分析,结果显示HIBB-IPFE-SM9方案在计算和通信开销上与相关方案是可比的.

关键词：内积函数加密分层广播加密标识密码 SM9 选择明文安全

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数据与知识融合的电能表故障关联模型研究

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电测与仪表 2024年第4期61卷 206-211页

作者：丁黎夏水斌魏伟王子钰梁益洁彭晗国网湖北省电力有限公司营销服务中心(计量中心) 武汉430072 华中科技大学电气与电子工程学院武汉430074

当前各地积累了大量因故障拆回的电能表,但拆回表的价值尚未充分发掘。文中利用拆回表信息构建从“电能表故障现象”到“元器件故障”的关联模型给出了建立该模型的完整流程。首先对拆回表进行开盖检视,记录初步结果并进行数据筛分、清... 详细信息

当前各地积累了大量因故障拆回的电能表,但拆回表的价值尚未充分发掘。文中利用拆回表信息构建从“电能表故障现象”到“元器件故障”的关联模型给出了建立该模型的完整流程。首先对拆回表进行开盖检视,记录初步结果并进行数据筛分、清洗,获得故障现象与元器件故障之间的直接与间接关系;其次对于直接关系采用统计方法建模,对于间接关系则以层次分析法为桥梁进行建模,最终获得完整关联模型。文中还给出了该模型的应用实例与数据更新方法。通过实验证明了该方法有效性,所提方法可用于指导电能表的维护检修及生产流程改进。

关键词：电能表故障元器件故障数据筛分清洗层次分析法

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建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

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