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2024年美国临床肿瘤学会胃肠肿瘤研讨会(ASCO-GI)食管癌治疗进展解读

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中国胸心血管外科临床杂志 2024年第6期31卷 807-813页

作者：张旭旭李俊海徐欣瑶李家贺张继朋李玮王磊卢强陕西中医药大学陕西咸阳712046 空军军医大学第二附属医院胸腔外科西安710038 河南省新蔡县人民医院胸腔外科河南新蔡463500

2024年美国临床肿瘤学会胃肠肿瘤研讨会(American Society of Clinical Oncology Gastrointestinal Cancers Symposium,ASCO-GI)于当地时间1月18—20日在美国旧金山举行。本次大会报道的多个研究将对食管癌的临床实践产生重要影响。本... 详细信息

2024年美国临床肿瘤学会胃肠肿瘤研讨会(American Society of Clinical Oncology Gastrointestinal Cancers Symposium,ASCO-GI)于当地时间1月18—20日在美国旧金山举行。本次大会报道的多个研究将对食管癌的临床实践产生重要影响。本文将从食管癌的手术方式、围手术期免疫治疗、晚期食管癌药物治疗和免疫治疗耐药后解救治疗等角度出发,整理及解读此次大会中食管癌领域的重要进展。

关键词：食管癌美国临床肿瘤学会胃肠肿瘤研讨会临床治疗解读

A Novel System for Recognizing Recording Devices from Recorded Speech Signals

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Computers, Materials & Continua 2020年第12期65卷 2557-2570页

作者： Yongqiang Bao Qi Shao xuxu zhang Jiahui Jiang Yue Xie Tingting Liu Weiye Xu Nanjing Institute of Technology Nanjing211167China Department of Informatics University of LeicesterLeicesterLE17RHUK

The field of digital audio forensics aims to detect threats and fraud in audio *** audio forensic techniques use digital signal processing to detect the authenticity of recorded speech,recognize speakers,and recognize recording ***-generated audio recordings from mobile phones are very helpful in a number of forensic *** article proposed a novel method for recognizing recording devices based on recorded audio ***,a database of the features of various recording devices was constructed using 32 recording devices(20 mobile phones of different brands and 12 kinds of recording pens)in various ***,the audio features of each recording device,such as the Mel-frequency cepstral coefficients(MFCC),were extracted from the audio signals and used as model ***,support vector machines(SVM)with fractional Gaussian kernel were used to recognize the recording devices from their audio *** demonstrated that the proposed method had a 93.4%accuracy in recognizing recording devices.

关键词： Recording device recognition Mel-frequency cepstral coefficients support vector machines

Highly selective photocatalytic reduction of CO_(2) to CH_(4) on electron-rich Fe species cocatalyst under visible light irradiation

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Carbon Energy 2024年第1期6卷 255-266页

作者： Qianying Lin Jiwu Zhao Pu zhang Shuo Wang Ying Wang Zizhong zhang Na Wen Zhengxin Ding Rusheng Yuan xuxu Wang Jinlin Long State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhouChina

Efficient photocatalytic reduction of CO_(2) to high-calorific-value CH4,an ideal target product,is a blueprint for C_(1)industry relevance and carbon neutrality,but it also faces great ***,we demonstrate unprecedented hybrid SiC photocatalysts modified by Fe-based cocatalyst,which are prepared via a facile impregnation-reduction method,featuring an optimized local electronic *** exhibits a superior photocatalytic carbon-based products yield of 30.0μmol g^(−1) h^(−1) and achieves a record CH_(4) selectivity of up to 94.3%,which highlights the effectiveness of electron-rich Fe cocatalyst for boosting photocatalytic performance and ***,the synergistic effects of directional migration of photogenerated electrons and strongπ-back bonding on low-valence Fe effectively strengthen the adsorption and activation of reactants and intermediates in the CO_(2)→CH_(4) *** study inspires an effective strategy for enhancing the multielectron reduction capacity of semiconductor photocatalysts with low-cost Fe instead of noble metals as cocatalysts.

关键词： artificial synthesis of CH_(4) electronic structure optimization Fe species cocatalyst photocatalytic CO_(2) reduction SiC

Research on the Impact of Equity Pledge on Company Value

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Proceedings of Business and Economic Studies 2024年第4期7卷 60-65页

作者： Tao zhang xuxu Zhu Jie Tian Hebei GEO University Shijiazhuang 050030China

This article aims to provide a literature review on the impact of equity pledges on corporate value,and to explore in depth the application of equity pledges as a financial tool in corporate governance and capital operation,as well as its multidimensional impact on corporate *** reviewing and analyzing relevant literature both domestically and internationally,this article first defines the basic concept of equity pledges and then elaborates on the impact mechanism of equity pledges on company value from both positive and negative *** terms of positive impact,this article explores how equity pledges can promote corporate financing,optimize capital structure,and enhance the control of major shareholders over the *** terms of negative impacts,the possible control risk,market risk,and potential damage to the interests of small and medium-sized shareholders brought about by equity pledges were ***,this article also discusses the differences in the impact of equity pledges on company value in different scenarios and proposes corresponding policy recommendations and research prospects.

关键词： Equity pledge Company value Financing Corporate governance Market risk

Historical tillage promotes grass-legume mixtures establishment and accelerates soil microbial activity and organic carbon decomposition

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Journal of Arid Land 2024年第7期16卷 910-924页

作者： ZHOU Jiqiong GONG Jinchao WANG Pengsen SU Yingying LI xuxu LI Xiangjun LIU Lin BAI Yanfu MA Congyu WANG Wen HUANG Ting YAN Yanhong zhang Xinquan Department of Grassland Science College of Grassland Science&TechnologySichuan Agricultural UniversityChengdu 611130China Yunnan Sheep Breeding and Extension Center Kunming 655204China

Perennial grass-legume mixtures have been extensively used to restore degraded grasslands,increasing grassland productivity and forage *** is crucial for seedbed preparation and sustainable weed management for the establishment of grass-legume ***,a common concern is that intensive tillage may alter soil characteristics,leading to losses in soil organic carbon(SOC).We investigated the plant community composition,SOC,soil microbial biomass carbon(MBC),soil enzyme activities,and soil properties in long-term perennial grass-legume mixtures under two different tillage intensities(once and twice)as well as in a fenced grassland(FG).The establishment of grass-legume mixtures increased plant species diversity and plant community coverage,compared with *** with once tilled grassland(OTG),twice tilled grassland(TTG)enhanced the coverage of high-quality leguminous forage species by 380.3%.Grass-legume mixtures with historical tillage decreased SOC and dissolved organic carbon(DOC)concentrations,whereas soil MBC concentrations in OTG and TTG increased by 16.0%and 16.4%,respectively,compared with *** significantly decreased the activity of N-acetyl-β-D-glucosaminidase(NAG)by 72.3%,whereas soil enzymeβ-glucosidase(βG)in OTG and TTG increased by 55.9%and 27.3%,respectively,compared with *** analysis indicated a close association of the increase in MBC andβG activities with the rapid decline in *** result suggested that MBC was a key driving factor in soil carbon storage dynamics,potentially accelerating soil carbon cycling and facilitating biogeochemical *** establishment of grass-legume mixtures effectively improves forage quality and boosts plant diversity,thereby facilitating the restoration of degraded *** tillage assists in establishing legume-grass mixtures by controlling weeds,it accelerates microbial activity and organic carbon *** findings provide a foundation for understanding the

关键词： tillage grass-legume mixtures fencing grassland microbial biomass carbon β-glucosidase(βG) N-acetyl-β-D-glucosaminidase(NAG)

一种基于星点特征不变原理的快速星图识别方法

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半导体光电 2018年第1期39卷 113-117页

作者：张旭旭尹达一中国科学院上海技术物理研究所中国科学院红外探测与成像技术重点实验室上海200083 中国科学院大学北京100039

星图识别算法是星敏感器输出姿态的关键技术。根据星图从天球坐标系转换到星敏感器坐标系过程中存在特征值不变的原理,结合视场和星等需求建立了导航星表。并根据星图识别要求设计了对应的快速识别算法。针对特征表维数多的特点,采用K... 详细信息

星图识别算法是星敏感器输出姿态的关键技术。根据星图从天球坐标系转换到星敏感器坐标系过程中存在特征值不变的原理,结合视场和星等需求建立了导航星表。并根据星图识别要求设计了对应的快速识别算法。针对特征表维数多的特点,采用K向量法提高搜索效率,同时采用并行计算的思想进一步提高搜索速度。采用Matlab编程实现了算法,并进行了仿真。结果表明,算法的识别效率可达97.8%,平均搜索时间可达14.4ms,能够满足准确率高、识别速度快的要求。

关键词：星图识别特征不变 K向量并行计算

加载速率影响的含裂隙类岩石材料破断试验与数值模拟

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岩石力学与工程学报 2018年第8期37卷 1833-1842页

作者：罗可招国栋曾佳君张栩栩蒲成志南华大学核资源工程学院湖南衡阳421001

为了探索加载速率对裂隙岩体强度规律及变形特征的影响,分析加载速率与裂隙倾角复合因素影响下裂隙岩体破断响应规律,室内制备含不同倾角裂隙类岩石试件,基于RMT–150B对其进行不同加载速率下的单轴压缩试验,结果表明:在静态加载条件下... 详细信息

为了探索加载速率对裂隙岩体强度规律及变形特征的影响,分析加载速率与裂隙倾角复合因素影响下裂隙岩体破断响应规律,室内制备含不同倾角裂隙类岩石试件,基于RMT–150B对其进行不同加载速率下的单轴压缩试验,结果表明:在静态加载条件下,裂隙体峰值强度对应应变值与加载速率呈负相关性;相同裂隙倾角下,裂隙体峰值强度呈现出随加载速率的增加而非线性增大的规律;相同加载速率下,裂隙体峰值强度受控于裂隙倾角,在裂隙倾角为15°时出现最小值;裂隙体弹性模量同时受裂隙倾角和加载速率的影响,并随裂隙倾角的增大而近似线性增大,随加载速率的增加而非线性增大,并趋近于一个常数。为弥补室内试验测试技术在反映裂隙体微观形态上的不足,运用PFC2D数值计算平台,基于平直节理接触单元构建裂隙体数值分析模型,设定与室内试验测试环境相同的边界条件,对比完整试件变形破坏特征数据,标定数值模型细观力学参数;数值模拟试验发现:裂隙体峰值强度与裂隙倾角及加载速率之间的关系与室内试验测试结果相吻合;同时获得数值模拟试验过程中的裂隙尖端应力响应规律,发现15°时裂隙尖端应力集中现象最显著。

关键词：岩石力学加载速率类岩石试件裂隙体强度规律变形特征数值模拟

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欧盟的印太战略及对中国的启示

重庆交通大学学报（社会科学版） 2023年第1期23卷 42-50页

作者：张许许外交学院国际关系研究所北京100037

在欧盟主要国家相继推出印太战略之后,欧盟层面的印太战略随之公布。欧盟印太战略是为应对并超越中美大国竞争,重视与印太伙伴合作达到自身战略目的,最终目标是维护其作为世界经济、科技一极的中心地位。有鉴于此,中国一方面应密切关注... 详细信息

在欧盟主要国家相继推出印太战略之后,欧盟层面的印太战略随之公布。欧盟印太战略是为应对并超越中美大国竞争,重视与印太伙伴合作达到自身战略目的,最终目标是维护其作为世界经济、科技一极的中心地位。有鉴于此,中国一方面应密切关注欧盟在印太的战略新动向,加深与欧盟的合作与交流,增进双方战略与政治互信,在此基础上加强中欧人文交流;另一方面,深化与印太国家合作,营造良好的周边发展环境,切实维护好我国的国家利益。

关键词：欧盟印太战略印太地区中国中欧关系

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印太战略视角下特朗普政府时期美印关系浅析

荆楚学刊 2021年第2期22卷 5-14页

作者：张许许外交学院国际关系研究所北京100000

特朗普政府时期,“印太”由“概念”经过不断发展逐渐演变为“战略”,通过对其发展演变规律及主要目标意图分析可知,其目的主要是应对中国的“一带一路”、进一步遏制中国的发展壮大、通过加强政治与军事合作整合自身盟友体系,进一步对... 详细信息

特朗普政府时期,“印太”由“概念”经过不断发展逐渐演变为“战略”,通过对其发展演变规律及主要目标意图分析可知,其目的主要是应对中国的“一带一路”、进一步遏制中国的发展壮大、通过加强政治与军事合作整合自身盟友体系,进一步对印太地区发挥更大的影响力。正是在这些共同利益的推动下,特朗普政府时期美印在政治、经贸、防务与科技合作方面有了新的变化,呈现出更加亲密的特点。但是,美印关系在印太战略背景下发展也并非顺风顺水,在特朗普政府时期两国在军事与安全领域、经济政治改革、全球性问题、目标与战略定位等方面也同样存在着较大分歧,同时中俄巴三国以及克什米尔等问题也对其关系产生相应的影响。

关键词：印太战略特朗普政府美印关系双边关系