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Identification of the Intrinsic Dielectric Properties of Metal Single Atoms for Electromagnetic Wave Absorption

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Nano-Micro Letters 2022年第2期14卷 107-123页

作者： Xinci Zhang Yanan shi Jia Xu Qiuyun Ouyang Xiao Zhang Chunling Zhu Xiaoli Zhang yujin Chen Key Laboratory of In‑Fiber Integrated Optics College of Physics and Optoelectronic EngineeringHarbin Engineering UniversityHarbin 150001People’s Republic of China College of Materials Science and Chemical Engineering Harbin Engineering UniversityHarbin 150001People’s Republic of China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001People’s Republic of China

Atomically dispersed metals on N-doped carbon supports(M-N_(xCs)) have great potential applications in various fields.However,a precise understanding of the definitive relationship between the configuration of metal single atoms and the dielectric loss properties of M-N_(xCs) at the atomic-level is still lacking.Herein,we report a general approach to synthesize a series of three-dimensional(3D)honeycomb-like M-N_xC(M=Mn,Fe,Co,Cu,or Ni) containing metal single atoms.Experimental results indicate that 3D M-N_(xCs) exhibit a greatly enhanced dielectric loss compared with that of the NC matrix.Theoretical calculations demonstrate that the density of states of the d orbitals near the Fermi level is significantly increased and additional electrical dipoles are induced due to the destruction of the symmetry of the local microstructure,which enhances conductive loss and dipolar polarization loss of 3D M-N_(xCs),respectively.Consequently,these 3D M-N_(xCs) exhibit excellent electromagnetic wave absorption properties,outperforming the most commonly reported absorbers.This study systematically explains the mechanism of dielectric loss at the atomic level for the first time and is of significance to the rational design of high-efficiency electromagnetic wave absorbing materials containing metal single atoms.

关键词： Metal single atoms Dielectric loss behavior NaCl-templating method Lightweight absorbers Honeycomb-like N-doped nanocarbons

Insight into the role of ethylene glycol on thermodynamics and nucleation kinetics of dimethyl terephthalate in mixed solvent system

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Particuology 2024年第2期85卷 1-12页

作者： yujin Zhang Chunyan shi Jing Tang Li Liu Dongxia Yan Qing Zhou Xingmei Lu Songyan Jia College of Chemical Engineering Shenyang University of Chemical TechnologyShenyang110142China Bejing Key Laboratoryoflonic Liquids Clean Process CAS Key LaboratoryofGreen Process and EngineeringState Key Laboratoryof Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China School of Chemistry and Chemical Engineering Qingdao UniversityQingdao266071China Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou450001China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China

Dissolution and nucleation are two essential processes for industrial crystallization.This paper in-vestigates the effect of ethylene glycol addition on the crystallization behavior of dimethyl terephthalate(DMT)in solution.The DMT solubility in mixed solvent system(methanol-ethylene glycol)was deter-mined by isothermal satiation approach,and the solubility was associated using seven models.The model fitting results were consistent with the experimental values.Based on the results,the metastable zone width(MSZW)of DMT was detected by the polythermal approach;the modified Sangwal's theory was used to investigate the nucleation behavior,which can provide a new way of thought for better analysis of the crystallization behavior.The results demonstrated that MSZW was associated with various elements,such as cooling rate,saturation temperature and mass fraction of ethylene glycol.The addition of ethylene glycol slowed down the nucleation rate as shown by the broadening of MSZW.We derive the solid-liquid interface energy,the nucleation driving force,the critical nucleation size and the critical Gibbs free energy according to the classical nucleation theory.It is demonstrated that the nucleation driving force and the solid-liquid interface energy are dependent and jointly influence the MSZW.

关键词： Dissolution Nucleation Solubility Apparent thermodynamic parameters Metastable zone width Solid-liquid interface energy

Petrogenesis of Early Permian Intrusive Rocks from Southeastern Inner Mongolia, China: Constraints on the Tectonic Framework of the Southeastern Central Asian Orogenic Belt

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Acta Geologica Sinica(English Edition) 2022年第5期96卷 1566-1586页

作者： QIAN Cheng LU Lu shi Lu DU Jiyu WANG Yan YANG Xiaoping ZHANG yujin Shenyang Center China Geological SurveyShenyang 110034China College of Paleontology Shenyang Normal UniversityShenyang 110034China Key Laboratory of Evolution of Past Life in Northeast Asia Ministry of Land and ResourcesShenyang 110034China

The late Paleozoic tectonic framework of the southeastern Central Asian Orogenic Belt is key to restricting the accretion orogeny between the Siberia Craton and the North China Craton. To clarify the framework, petrogenesis of early Permian intrusive rocks from southeastern Inner Mongolia was studied. Zircon U-Pb dating for bojite and syenogranite from Ar-Horqin indicate that they were emplaced at 288–285 Ma. Geochemical data reveal that the bojite is highly magnesian and low-K to middle-K calc-alkaline, with E-MORB-type REE and IAB-like trace element patterns. The syenogranite is a middle-K calc-alkaline fractionated A-type granite and shows oceanic-arc-like trace element patterns, with depleted Sr-Nd-Hf isotopes,(~(87)Sr/~(86)Sr)I = 0.7032–0.7042, ε_(Nd)(t) = +4.0 to +6.6 and zircon ε_(Hf)(t) = +11.14 to +14.99. This suggests that the bojite was derived from lithospheric mantle metasomatized by subducted slab melt, while the syenogranite originated from very juvenile arc-related lower crust. Usng data from coeval magmatic rocks from Linxi-Ar-Horqin, the Ar-Horqin intra-oceanic arc was reconstructed, i.e., initial transition in 290–280 Ma and mature after 278 Ma. Combined with regional geological and geophysical materials in southeastern Inner Mongolia, an early Permian tectonic framework as ‘one narrow ocean basin of the PAO', ‘two continental marginal arcs on its northern and southern' and ‘one intra-oceanic arc in its southern' is proposed.

关键词： tectonic framework early Permian intra-oceanic arc southeastern Inner Mongolia Central Asian Orogenic Belt

Control Structure Analysis and Recovery of Embedded Binaries

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Chinese Journal of Electronics 2017年第6期26卷 1118-1124页

作者： JI Weixing HUO Yuanhong WANG Yizhuo GAO yujin shi Feng Beijing Institute of Technology

Existing decompilers use rule-based algorithms to transform unstructured Control flow graph(CFG) into equivalent high-level programming language constructs with "goto" statements. One problem of such approaches is that they generate a large number of "goto"s in the output code, which reduce the readability and hinder the understanding of input binaries. A global search algorithm is proposed based on structural analysis. This algorithm restructures a CFG and generates fewer number of "goto" statements than the rule-based algorithm does.We also present a Genetic algorithm(GA) for the global search approach to locate near optimal solutions for large CFGs. Evaluation results on a set of real CFGs show that the genetic algorithm-based heuristic for global search is capable of finding high-quality solutions.

关键词： Decompiling Control flow graph restructuring Structural analysis Genetic algorithm(GA)

Survival nomogram for patients with de novo metastatic breast cancer based on the SEER database and an external validation cohort

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Cancer Pathogenesis and Therapy 2023年第4期1卷 253-261页

作者： Lizhi Ning Yaobang Liu yujin Hou Miaozhou Wang Mingqiang shi Zhen Liu Jiuda Zhao Xinlan Liu Department of Medical Oncology General Hospital of Ningxia Medical UniversityYinchuanNingxia 750004China Department of Surgical Oncology General Hospital of Ningxia Medical UniversityYinchuanNingxia 750004China Breast Disease Diagnosis and Treatment Center of Affiliated Hospital of Qinghai University&Affiliated Cancer Hospital of Qinghai University XiningQinghai 810000China

Background On average,5-10%of patients are diagnosed with metastatic breast cancer(MBC)at the initial diagnosis.This study aimed to develop a nomogram to predict the overall survival(OS)in these patients.Methods The nomogram was based on a retrospective study of 9435 patients with de novo MBC from the Surveillance,Epidemiology,and End Results(SEER)database.The predictive accuracy and discriminative ability of the nomogram were determined using the concordance index(C-index),area under the time-dependent receiver operating characteristic curve(AUC),and calibration curve.Decision curve analysis(DCA)was employed to evaluate the benefits and advantages of our new predicting model over the 8th edition of the American Joint Committee on Cancer(AJCC)Tumor Node Metastasis(TNM)staging system.The results were validated in a retrospective study of 103 patients with de novo MBC from January 2013 to June 2022 at an institution in northwest China.Results Multivariate analysis of the primary cohort revealed that independent factors for survival were age at diagnosis,pathological type,histological grade,T stage,N stage,molecular subtype,bone metastasis,brain metastasis,liver metastasis,lung metastasis,surgery,chemotherapy,and radiotherapy.The nomogram achieved a C-index of 0.688(95%confidence interval[CI],0.682-0.694)in the training cohort and 0.875(95%CI,0.816-0.934)in the validation cohort.The AUC of the nomograms indicated good specificity and sensitivity in the training and validation cohorts,respectively.Calibration curves showed favorable consistency between the predicted and actual survival probabilities.Additionally,the DCA curve produced higher net gains than by the AJCC-TNM staging system.Finally,risk stratification can accurately identify groups of patients with de novo MBC at different risk levels.Conclusions The nomogram showed favorable predictive and discriminative abilities for OS in patients with de novo MBC.Other populations from different countries or prospective studies are needed to further validate the nomo

关键词： De novo metastatic breast cancer Overall survival SEER Nomogram

Dominating factors on well productivity and development strategies optimization in Weiyuan shale gas play, Sichuan Basin, SW China

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Petroleum Exploration and Development 2020年第3期47卷 594-602页

作者： MA Xinhua LI Xizhe LIANG Feng WAN yujin shi Qiang WANG Yonghui ZHANG Xiaowei CHE Mingguang GUO Wei GUO Wei PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China

Weiyuan shale gas play is characterized by thin high-quality reservoir thickness,big horizontal stress difference,and big productivity differences between wells.Based on integrated evaluation of shale gas reservoir geology and well logging interpretation of more than 20 appraisal wells,a correlation was built between the single well test production rate and the high-quality reservoir length drilled in the horizontal wells,high-quality reservoir thickness and the stimulation treatment parameters in over 100 horizontal wells,the dominating factors on horizontal well productivity were found out,and optimized development strategies were proposed.The results show that the deployed reserves of high-quality reservoir are the dominating factors on horizontal well productivity.In other words,the shale gas well productivity is controlled by the thickness of the high-quality reservoir,the high-quality reservoir drilling length and the effectiveness of stimulation.Based on the above understanding,the development strategies in Weiyuan shale gas play are optimized as follows:(1)The target of horizontal wells is located in the middle and lower parts of Longyi 11(Wei202 area)and Longyi 11(Wei204 area).(2)Producing wells are drilled in priority in the surrounding areas of Weiyuan county with thick high-quality reservoir.(3)A medium to high intensity stimulation is adopted.After the implementation of these strategies,both the production rate and the estimated ultimate recovery(EUR)of individual shale gas wells have increased substantially.

关键词： Weiyuan shale gas play dominating factors of well productivity deployed reserves of high-quality reservoir thickness of high-quality reservoir high-quality reservoir drilling length effectiveness of stimulation development strategies optimization

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Genetic analysis and QTL mapping of stalk cell wall components and digestibility in maize recombinant inbred lines from B73 × By804

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The Crop Journal 2020年第1期8卷 132-139页

作者： Qi Wang Kun Li Xiaojiao Hu Huimin shi Zhifang Liu yujin Wu Hongwu Wang Changling Huang National Key Facility for Crop Gene Resources and Genetic Improvement Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijingChina National Engineering Laboratory for Crop Molecular Breeding BeijingChina

The cell wall composition and structure of the maize stalk directly affects its digestibility and in turn its feed value.Previous studies of stem quality have focused mostly on common maize germplasm,and few studies have focused on high-oil cultivars with high grain and straw quality.Investigation of the genetic basis of cell wall composition and digestibility of maize stalk using high-oil maize is desirable for improving maize forage quality.In the present study,a high-oil inbred line(By804)was crossed as male parent with the maize inbred line B73 to construct a population of 188 recombinant inbred lines(RILs).The phenotypes of six cell-wall-related traits were recorded,and QTL analysis was performed with a genetic map constructed with SNP markers.All traits were significantly correlated with one another and showed high broad-sense heritability.Of 20 QTLs mapped,the QTL associated with each trait explained 10.0%–41.1%of phenotypic variation.Approximately half of the QTL each explained over 10%of the phenotypic variation.These results provide a theoretical basis for improving maize forage quality by marker-assisted selection.

关键词： Maize QTL Cell wall Digestibility Recombinant inbred lines

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上海陆域古河道分布及对工程建设影响研究

工程地质学报 2011年第2期19卷 277-283页

作者：史玉金上海市地质调查研究院上海200072

上海地区第四纪时期古河道发育,其中晚更新世以来的古河道对工程建设影响最大。根据大量钻孔及测试资料,研究了晚更新世末期古河道、全新世晚期吴淞江古河道和近代古河道的成因、分布规律及沉积物特征。在此基础上,结合上海市工程建设特... 详细信息

上海地区第四纪时期古河道发育,其中晚更新世以来的古河道对工程建设影响最大。根据大量钻孔及测试资料,研究了晚更新世末期古河道、全新世晚期吴淞江古河道和近代古河道的成因、分布规律及沉积物特征。在此基础上,结合上海市工程建设特点,系统分析了古河道对工程建设,尤其是地下空间开发的影响,成果可为工程勘察、设计、施工提供基础地质依据。

关键词：晚更新世古河道暗浜沉积物工程建设流砂

韩孟诗派最后十年的孤芳与微澜——以备受争议的《石鼎联句》为中心

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北京师范大学学报（社会科学版） 2023年第4期 108-122页

作者：孙羽津中共中央党校(国家行政学院)文史部北京100091

联句创作是韩孟诗派发展的动力机制,是奇诡诗风的重要表征。综观《石鼎联句》千年阐释史,朱熹-魏源一派“去序考诗”的研究路径颇具价值。沿此详加统计分析,不难窥见韩愈联句区别于其他唐人联句的形式特征,以及富含政治讽谕和人性反思... 详细信息

联句创作是韩孟诗派发展的动力机制,是奇诡诗风的重要表征。综观《石鼎联句》千年阐释史,朱熹-魏源一派“去序考诗”的研究路径颇具价值。沿此详加统计分析,不难窥见韩愈联句区别于其他唐人联句的形式特征,以及富含政治讽谕和人性反思的意义空间,而《石鼎联句》适与韩愈联句的各项特征高度吻合,联句作者、本事及作年遂得一一落实。由此可见,《石鼎联句》不仅忠实继承了韩孟诗派鼎盛时期的联句形制,而且在最具难度的借物托讽一脉上着意用工,踵事增华,突破了双人联句平分秋色的基本格局,孕育着韩孟诗派结构性变革及其与古文运动融合发展的美妙契机,可谓韩孟诗派最后十年的重大关捩。

关键词：韩孟诗派韩愈联句体《石鼎联句》奇诡诗风