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Synthetic Studies toward Pseudolaric Acids:Radical Cyclization to Form Bridged Scaffold

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Chinese Journal of Chemistry 2024年第15期42卷 1699-1705页

作者： Yujie Niu Minggui Lin hao cui Yanji Huang Yang Shen Yandong Zhang State Key Laboratoryof Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian ProvinceicHEMCollege of Chemistryand Chemical EngineeringXiamen UniversityXiamenFujian 361005China

Pseudolaric acids are a family of diterpenoid natural products that exhibit a broad spectrum of biological *** main structural feature of their framework is a trans-fused perhydroazulene bearing a bridged lactone positioned at the junction of the ***,we have developed a radical cyclization strategy that allows flexible tuning of the cyclization process through diverse silicon substitutions on the *** strategy can assist in constructing a series of skeletons with structural resemblance to pseudolaric acids and expedites the construction of the bridged ***,it facilitates the synthesis of the entire skeletal structure of the pseudolaric acidfamily of natural products,excludingthe B-ringfunctionalization.

关键词： Terpenoids Total synthesis Radical cyclization Bridged cycles Regioselectivity

Cloud-Model-Based Feature Engineering to Analyze the Energy-Water Nexus of a Full-Scale Wastewater Treatment Plant

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Engineering 2024年第5期36卷 63-75页

作者： Shan-Shan Yang Xin-Lei Yu Chen-hao cui Jie Ding Lei He Wei Dai Han-Jun Sun Shun-Wen Bai Yu Tao Ji-Wei Pang Nan-Qi Ren State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150000China Key Laboratory of Environmental Biotechnology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China School of Civil and Environmental Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China China Energy Conservation and Environmental Protection Group Beijing 100089China

Wastewater treatment plants(WWTPs)are important and energy-intensive municipal *** energy consumption and relatively low operating performance are major challenges from the perspective of carbon ***,water-energy nexus analysis and models for WWTPs have rarely been reported to *** this study,a cloud-model-based energy consumption analysis(CMECA)of a WWTP was conducted to explore the relationship between influent and energy consumption by clustering its influent’s *** principal component analysis(PCA)and K-means clustering were applied to classify the influent condition using water quality and volume *** energy consumption of the WWTP is divided into five standard evaluation levels,and its cloud digital characteristics(CDCs)were extracted according to bilateral constraints and golden ratio *** results showed that the energy consumption distribution gradually dispersed and deviated from the Gaussian distribution with decreased water concentration and *** days with high energy efficiency were extracted via the clustering method from the influent category of excessive energy consumption,represented by a compact-type energy consumption distribution curve to identify the influent conditions that affect the steady distribution of energy *** local WWTP has high energy consumption with 0.3613 kW·h·m^(-3)despite low influent concentration and volumes,across four consumption levels from low(I)to relatively high(IV),showing an unsatisfactory operation and management *** average oxygenation capacity,internal reflux ratio,and external reflux ratio during high energy efficiency days recognized by further clustering were obtained(0.2924-0.3703 kg O_(2)·m^(-3),1.9576-2.4787,and 0.6603-0.8361,respectively),which could be used as a guide for the days with low energy ***,this study offers a water-energy nexus analysis method to identify influent conditions with operational manageme

关键词： Wastewater treatment plants Cloud-model theory Data mining Principal component analysis K-means clustering Cloud-model-based energy consumption analysis

Solid solution strategy modulated defects engineering of(Cr_(1-x)V_(x))_(2)AlC MAX phase toward superior electromagnetic wave absorption

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Rare Metals 2024年第7期43卷 3205-3219页

作者： Ji-Lin Gou Yu-Kai Chang Shu Liu Peng-Hui Li Ping-hao cui Qian-Ku Hu Li-Bo Wang Xin Zhang Jun-Kai Wang Qi-Xun Xia Ai-Guo Zhou School of Materials Science and Engineering Henan Polytechnic UniversityJiaozuo 454003China Key Laboratory for Microstructural Material Physics of Hebei Province School of ScienceYanshan UniversityQinhuangdao 066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China

Defects engineering is an effective strategy for manipulating electromagnetic parameters and enhancing electromagnetic wave(EMW)absorption ***,the relationship between them is not clear,especially in solid solution *** this work,a series of(Cr_(1-x)V_(x))_(2)AlC MAX phase solid solutions with layered structure were prepared via tuning the ratio of Cr and V to explore their EMW absorption *** experimental results indicated that the doping of V atoms at the M-site could effectively regulate its impedance matching and EMW absorption properties by introducing appropriate numbers of defects in the crystal,such as twin boundaries,dislocations and lattice *** them,if Cr:V=3:1,Cr_(1.5)V_(0.5)AlC,as radar absorption materials,could reach a strong reflection loss of-51.8 dB at the frequency of 12.8 GHz under an ultra-thin thickness of 1.3 *** reflection loss value could attain-10 dB in a wide frequency range of 2.7-18 GHz and thickness range of 1-5 *** addition,after high temperature and acid-alkali immersion treatment,this sample still had good EMW absorption capability,and the effective absorption bandwidth was enhanced from 2.3 to 2.6 GHz after concentrated acid immersion or 3.1 GHz after concentrated alkali *** work has great reference significance for the research and development of high-performance MAX-based EMW absorption materials in harsh environments.

关键词： MAX phases Solid solution Defects engineering Electromagnetic wave absorption Harsh environments

数智赋能群众体育高质量发展的国际经验与中国策略

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湖南科技大学学报（社会科学版） 2024年第4期27卷 177-184页

作者：崔皓湖南科技大学体育学院湖南湘潭411201

信息技术的飞速发展为数字体育的发展提供了强有力的支撑,有效推进群众体育发展的数字化、智能化运行,已成为我国开展群众体育工作的必要之举。当下,我国的群众体育存在数字技术零散、融入整体性不强、没有形成可靠体系等方面难题,需要... 详细信息

信息技术的飞速发展为数字体育的发展提供了强有力的支撑,有效推进群众体育发展的数字化、智能化运行,已成为我国开展群众体育工作的必要之举。当下,我国的群众体育存在数字技术零散、融入整体性不强、没有形成可靠体系等方面难题,需要科学借鉴国际已有经验,从主体、平台和制度等方面入手,结合我国的中国特色社会主义数字化体育管理经验,采用统筹群众体育活动、打造体育公共数据平台、管理群众体育信息、开发数智应用创新群众体育项目等方式,实现我国群众体育的高质量发展。

关键词：信息技术群众体育高质量发展国际经验中国策略

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体育赛事转播权益法律保护研究

广州体育学院学报 2024年第1期44卷 91-99页

作者：崔皓杭州师范大学沈钧儒法学院浙江杭州310000

体育赛事产业的收益重心近年来逐渐向赛事转播相关权益倾斜,然而法学理论和司法实践对体育赛事转播相关权益的理解仍存分歧,混用严重,导致我国在体育赛事转播相关权益的保护方面犹显不足。体育赛事转播权是赛事组织者最重要的权益之一,... 详细信息

体育赛事产业的收益重心近年来逐渐向赛事转播相关权益倾斜,然而法学理论和司法实践对体育赛事转播相关权益的理解仍存分歧,混用严重,导致我国在体育赛事转播相关权益的保护方面犹显不足。体育赛事转播权是赛事组织者最重要的权益之一,其实现过程也就是体育赛事的录制本身是赛事的主要支出,而体育赛事转播画面作为赛事转播权实现的成果则是赛事组织者的重要财产和收益来源。从赛事组织者的角度对赛事转播相关权益进行统筹论证,着重参考“场所权+著作权”的保护模式分析体育赛事转播权的权利属性和架构,强调体育赛事转播权与赛事转播画面的区别和联系,同时探讨我国新《体育法》的发展和适用,试图为我国赛事转播产业发展提供稳定良性的助益。

关键词：体育赛事转播权赛事转播画面体育赛事组织者

Fatty acid binding protein 5 is a novel therapeutic target for hepatocellular carcinoma

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World Journal of Clinical Oncology 2024年第1期15卷 130-144页

作者： Yan Li William Lee Zhen-Gang Zhao Yi Liu hao cui hao-Yu Wang Department of Gastroenterology Tianjin Third Central HospitalTianjin 300170China Biomedical Engineering Texas A&M UniversityCollege StationTX 77843United States

BACKGROUND Hepatocellular carcinoma(HCC)is an aggressive subtype of liver cancer and is one of the most common cancers with high mortality *** lipid metabolism plays crucial roles in HCC cancer cell survival,growth,and *** evidence suggests the importance of fatty acid binding proteins(FABPs)in contribution to cancer progression and metastasis;however,how these FABPs are dysregulated in cancer cells,especially in HCC,and the roles of FABPs in cancer progression have not been well *** To understand the genetic alterations and expression of FABPs and their associated cancer hallmarks and oncogenes in contributing to cancer *** We used The Cancer Genome Atlas datasets of pan cancer and liver hepatocellular carcinoma(LIHC)as well as patient cohorts with other cancer types in this *** investigated genetic alterations of FABPs in various cancer *** expression was used to determine if FABPs are abnormally expressed in tumor tissues compared to non-tumor controls and to investigate whether their expression correlates with patient clinical outcome,enriched cancer hallmarks and oncogenes previously reported for patients with *** determined the protein levels of FABP5 and its correlated genes in two HCC cell lines and assessed the potential of FABP5 inhibition in treating HCC *** We discovered that a gene cluster including five FABP family members(FABP4,FABP5,FABP8,FABP9 and FABP12)is frequently co-amplified in ***,in fact,is the most common genetic alteration for FABPs,leading to overexpression of ***5 showed the greatest differential mRNA expression comparing tumor with non-tumor *** FABP5 expression correlates well with worse patient outcomes(P<0.05).FABP5 expression highly correlates with enrichment of G2M checkpoint(r=0.33,P=1.1e-10),TP53 signaling pathway(r=0.22,P=1.7e-5)and many genes in the gene sets such as CDK1(r=0.56,P=0),CDK4(r=0.49,P=0),and TP53(r=0

关键词： Hepatocellular carcinoma Fatty acid binding protein Novel target Amplification Correlated expression

基于Copula传递熵的设备级和网络级宽频振荡传播路径分析及振荡源定位方法

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电工技术学报 2024年第16期39卷 4996-5010页

作者：冯双杨浩崔昊汤奕雷家兴东南大学电气工程学院南京210096

电力电子化电力系统的宽频振荡问题严重危害电网的安全稳定运行,及时确定宽频振荡的传播路径和振荡源位置,对振荡的抑制至关重要。该文从因果关系的角度提出一种基于Copula传递熵的设备级和网络级宽频振荡传播路径分析及振荡源定位方法... 详细信息

电力电子化电力系统的宽频振荡问题严重危害电网的安全稳定运行,及时确定宽频振荡的传播路径和振荡源位置,对振荡的抑制至关重要。该文从因果关系的角度提出一种基于Copula传递熵的设备级和网络级宽频振荡传播路径分析及振荡源定位方法,通过分析多变量之间的因果传递方向和因果强度系数,利用有向加权图构建宽频振荡因果网络,在此基础上确定振荡源位置,并通过保留因果强度系数最大的支路,确定振荡的主要传播路径。采用所提方法一方面能够从设备级分析控制器内部各状态变量的因果关联性;另一方面能够从网络级分析电网中各节点振荡数据的因果传递性,从而确定宽频振荡在控制器内部和电网中的传播路径及振荡源位置。最后,在强迫振荡、风机与弱电网交互、发电机轴系振荡中的仿真算例表明,所提方法适用于多种机理的宽频振荡,能够同时实现设备级和网络级宽频振荡传播路径分析和振荡源定位。

关键词：宽频振荡振荡传播振荡源定位 Copula传递熵因果分析

Rastall gravity:accretion disk image in the context of radiation fields and visual transformations compared to Reissner-Nordström black hole

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Chinese Physics C 2024年第4期48卷 174-182页

作者：黄宇翔郭森梁宇崔宇昊蒋青权林恺 School of Physics and Astronomy China West Normal UniversityNanchong 637000China Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and TechnologyGuangxi UniversityNanning 530004China Hubei Subsurface Multi-scale Imaging Key Laboratory Institute of Geophysics and GeomaticsChina University of GeosciencesWuhan 430074China

In this study,we investigated the astronomical implications of Rastall gravity,particularly its behavior amidst a radiation field compared to Reissner-Nordström(RN)black *** found a crucial correlation between the dynamics of the accretion disk and the parameters Q and Nr,which properly reflect the influence of spacetime metrics on the disk’s *** electric charge Q causes contraction in the disk’s orbit due to enhanced gravitational effects,while higher Nr values lead to outward expansion,influenced by the attributes of the radiation ***,the charged black holes surrounded by radiation fields exhibit distinct visual disparities from RN black *** decreases and expansion occurs within the innermost stable circular orbit of the accretion disk with rising Nr *** study also reveals the process by which the accretion disk transitions from a conventional disk-like structure to a hat-like form at different observation angles,with the redshift effect gradually ***,the results of the considered Rastall gravity radiation field are consistent with the constraints of the gravitational lensing of the host galaxy on Rastall gravity parameters,thereby enhancing the consistency between theoretical predictions and actual observations.

关键词： Rastall theory optical appearance thin accretion disk

粮食安全视域下中国自东盟农产品进口贸易潜力研究——基于随机前沿引力模型的测度

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国际经济合作 2024年第3期40卷 13-24,91页

作者：崔昊吴婷霍强保山学院经济管理学院保山学院大数据学院云南行政学院

粮食和能源安全是全球发展领域最紧迫的挑战,东盟是中国重要的农产品进口来源地。研究采用随机前沿引力模型,研究中国自东盟农产品进口贸易效率的影响因素,测度进口贸易潜力,并重点关注中国粮食安全指标对农产品进口效率的影响。研究发... 详细信息

粮食和能源安全是全球发展领域最紧迫的挑战,东盟是中国重要的农产品进口来源地。研究采用随机前沿引力模型,研究中国自东盟农产品进口贸易效率的影响因素,测度进口贸易潜力,并重点关注中国粮食安全指标对农产品进口效率的影响。研究发现,粮食安全指标对农产品进口效率没有显著促进作用,但对植物产品进口效率具有显著促进作用;粮食安全和“一带一路”倡议的叠加对农产品和植物产品进口效率均有显著促进作用。在此基础上,分析其政策含义并通过贸易潜力测算,可将东盟国家划分为观察区、重点区和核心区,有针对性加强与重点区国家的贸易合作。

关键词：粮食安全中国—东盟关系农产品贸易潜力随机前沿引力模型