Border Sensitive Knowledge Distillation for Rice Panicle Detection in UAV Images

Research on panicle detection is one of the most important aspects of paddy phenotypic analysis.A phenotyping method that uses unmanned aerial vehicles can be an excellent alternative to field-based methods.Nevertheless,it entails many other challenges,including different illuminations,panicle sizes,shape distortions,partial occlusions,and complex backgrounds.Object detection algorithms are directly affected by these factors.This work proposes a model for detecting panicles called Border Sensitive Knowledge Distillation(BSKD).It is designed to prioritize the preservation of knowledge in border areas through the use of feature distillation.Our feature-based knowledge distillation method allows us to compress the model without sacrificing its effectiveness.An imitation mask is used to distinguish panicle-related foreground features from irrelevant background features.A significant improvement in Unmanned Aerial Vehicle(UAV)images is achieved when students imitate the teacher’s features.On the UAV rice imagery dataset,the proposed BSKD model shows superior performance with 76.3%mAP,88.3%precision,90.1%recall and 92.6%F1 score.

Specialization or Diversification:Which is More Conducive to Foreign Trade Resilience?Evidence from China-Russia Border Regions in Northeast China

Under the background of complex international situation,how to build the special geo-economic space of China-Russia bor-der lies in strengthening their foreign trade resilience against external shocks.Based on empirical evidence from ten prefecture-level China-Russia border regions in Northeast China,this paper analyzed the spatiotemporal evolution of foreign trade resilience under different shocks.Furthermore,through the Panel Regression model,the mechanism of the industrial structure on the foreign trade resilience in contraction period and expansion period was discussed.The results showed that:1)from 2004 to 2021,foreign trade in China-Russia border regions experienced five phases.The overall foreign trade resilience was higher than expected,showing a rising volatility trend,but there was significant spatial heterogeneity in the ability of cities to cope with shocks.2)Highly specialized clusters were mainly concentrated in Yichun,Heihe and Da Hinggan Ling Prefecture,while Mudanjiang and Yanbian performed better in related and unrelated diversification.3)In different stages of economic system evolution,the response mode,degree and result of border foreign trade resilience to regional industrial structure showed obvious stage characteristics.During the contraction period,related diversification was more conducive to improving the resistance through risk spillovers.During the expansion period,specialization played a more significant role in improving regional resilience through self-reinforcing effect.These results are beneficial for expanding the resilience theory,ensuring border economic security and optimizing border industrial investment layout.

Application and Adaptability of Ornamental Grasses in Road Flower Borders in Hefei, Anhui Province

In-depth research was conducted on the types,seasonal patterns,spatial levels,overwintering,summering,drought resistance,and disease and pest resistance of ornamental grasses in the road flower borders of Hefei,Anhui Province.Through field investigations,a total of 36 ornamental grasses were identified,with Liliaceae having the most species and the Lamiaceae the least.The results show that there are more warm season ornamental grasses,of 23 species;Acorus gramineus and Melinis minutiflora have poor overwintering ability;Arrhenatherum elatius,Festuca glauca,and Stipa tenuissima have poor summer tolerance;most ornamental grasses have strong drought resistance and resistance to pests and diseases.The comprehensive investigation shows that ornamental grasses have good application prospects and adaptability in the road flower borders in Hefei city.

AHP-based Landscape Value Evaluation of Perennial Flower Border Application in Hefei City

An analytic hierarchy process(AHP)was employed to establish a landscape value evaluation model for 20 common species of perennial flowers in the flower border of Hefei City.With the overarching objective of determining the application value of the flower border,10 evaluation factors were identified and subsequently classified into 3 distinct grades.Grade I(L>2.5)was defined as perennial flower resources with the highest development and utilization value,including only one species of Salvia farinacea.Grade II(2.0≤L≤2.5)was defined as perennial flower varieties suitable for most areas,encompassing 9 species of plants,such asTaraxacummongolicum.Grade III(L<2.0)was defined as perennial flower varieties with low application value,encompassing 10 species of plants,such asRuellia brittoniana,but lacking the value of further popularization and application.Consequently,the proportion of their application in the flower border should be reduced.The evaluation results can serve as a theoretical foundation for the implementation of perennial flowers in urban flower borders.

Cross-border E-commerce Accelerates Diversely Abroad

“Strength”and“vitality”are the comments that people in the industry have used to describe China’s cross-border e-commerce in 2023,which has been proven by the latest statistics.According to the General Administration of Customs,in 2023,the total volume of imports and exports was RMB 2.38 trillion,up by 15.6%.The volume of exports was RMB 1.83 billion,up by 19.6%,and the volume of imports was RMB 548.3 billion,up by 3.9%.

Enhancement of Competitiveness of Border Trade Entrepreneurs: Case Study of Su-Ngai Kolok Checkpoint, Narathiwat Province

This research aimed to analyze the enhancement of competitiveness among fruit and vegetable export entrepreneurs,with the case study of the Su-ngai Kolok checkpoint in Narathiwat Province.This research focused on three objectives:(1)examining how competitiveness is enhanced through government support and the development of border trade zones,(2)studying the supply chain dynamics,including strategic factors and opportunities in agricultural product management,and(3)developing a model for border trade to strengthen exporters’capabilities.The research employed qualitative methods,with data collected from 25 informants through interviews and employed descriptive methods.The research results revealed that:(1)government agencies play a crucial role in improving competitiveness by developing border economic zones and trade policies;additionally,(2)the research highlighted the importance of strategic partnerships,network building,and efficient logistics along the value chain;(3)the proposed Border Trade Model includes elements for instance government policy,partnerships,entrepreneurial potential,and transportation channels,aiming to enhance the overall efficiency and effectiveness of vegetable and fruit exporters in the region.

Application of Flower Borders in Hefei City

The application value of 70 kinds of flowers in Hefei City was evaluated by analytic hierarchy process(AHP).From the three aspects of adaptability,ornamental value and economic traits,12 indicators were summarized to establish a comprehensive evaluation system.The results show that the application of grade-I plants(J≥3.6642)in flower borders is the most suitable,and they include 19 species of plants such as Osmanthus fragrans var.thunbergii,accounting for 27.14%.The application of grade-II plants(3.2319≤J≤3.6641)in flower borders is suitable,and 36 species of plants such as Jacobaea maritima are included,with the proportion of 51.42%.The application of grade-III plants(2.7935≤J≤3.2318)in flower borders is relatively suitable,and they contain 8 species of plants such as Acer palmatum’Atropurpureum’(Van Houtte)Schwerim,accounting for 11.42%.Grade-IV plants(J≤2.7934)can be applied in flower borders under special circumstances,and include 6 species of plants such as Muehlenbeckia complexa Meisn.,accounting for 8.57%.The results can provide reference for the selection of flower border plants in Hefei.The locations and types of 40 flower borders were summarized to provide a basis for the development direction and future planning of flower borders in Hefei.

Research on the Employment View of Acupuncture and Tuina Undergraduates in Minority Border Areas from Students’ Perspective

With the popularization of higher education in China,the employment situation of college students is more complex and severe.This paper adopts the questionnaire method to explore the employment view of acupuncture and tuina undergraduates of Yunnan University of Traditional Chinese Medicine.The employment concept of acupuncture and tuina undergraduates in the minority border areas has changed greatly.After graduation,97.95%of students choose to work in fields related to medicine and acupuncture,prefer positions close to home,and are attracted to high-salary companies,among other factors.Therefore,enhancing the competitive advantages of medical students by guiding their career planning,providing employment selection advice,fostering innovation and entrepreneurship,improving basic skills,and offering graduate entrance examination guidance is crucial for broadening their employment opportunities.

中蒙边界地区金地球化学分布特征及远景区预测

中蒙边界地区成矿地质条件优越,是世界上重要的金属成矿省和全球3大斑岩型铜、金、钼成矿带之一,资源潜力巨大,是国内外地学研究和贵金属、三稀资源勘查的热点地区。文章依托中蒙边界1∶1000000地球化学填图数据,探讨了汇水域沉积物中金的地球化学参数和区域地球化学分布特征。中蒙边界地区汇水域沉积物金元素含量中位值和平均值分别为0.79×10^(-9)和1.34×10^(-9);华北陆块和阿尔泰构造带金含量最高,区域浓集系数分别为1.43和1.36,是金的富集优势区。以金含量累积频率85%(1.55×10^(-9))、92.5%(2.22×10^(-9))和97.5%(4.03×10^(-9))划分外、中和内带,共圈定28处地球化学远景区,为该区寻找金等贵金属矿床提供了重要选区。研究填补了中蒙边界地区金地球化学空间分布的空白,为两国边境地区金等贵金属矿床对比提供基础数据。

跨境企业廉洁合规建设的法治之维

跨境企业是新时代高质量对外开放的重要载体。跨境企业的廉洁合规建设,是统筹国内反腐和涉外反腐,实现更高水平对外开放,维护国家主权、安全和发展权益的迫切需要,是随着“把一带一路建成廉洁之路”而兴起的中国原创,是廉洁价值观融入依法治企的制度设计。在国际环境更加复杂的背景下,跨境企业面临常规性法律风险、合规虚位的法律风险、政治打压带来的安全和发展风险,企业廉洁合规自治模式应上升到国家法律法规的层面,通过立法明确跨境腐败的定义、范围和入罪标准,明确跨境企业预防腐败法律义务和负激励机制,明确监察机关和相关部门监督管理职责等,以国家强制力反制美国等西方国家滥用腐败之名的企图,确保廉洁合规在跨境企业运行中更好地发挥优化营商环境、构建亲清新型政商关系、向国际社会展示廉洁形象的作用,成为中国式现代化建设的重要生力军。

跨境资本极端流动与中国金融部门系统性风险传染

随着全球金融一体化程度提高,跨境资本大幅度异常流动越来越频繁,而跨境资本高频次极端流动可能会加剧金融部门脆弱程度、提高系统性金融风险。本文实证检验了涌入、骤停、外逃、回撤四种类型跨境资本极端流动对我国金融部门系统性风险的影响,得出以下结论:(1)我国跨境资本极端流动的持续期和发生频次均较高,说明我国跨境资本流动具有“大进大出”“急进急出”的特征,且跨境资本极端流动类型频繁转换区间与各金融部门系统性风险的局部峰值具有较高的同步性。(2)不同类型跨境资本极端流动对金融部门系统性风险的影响具有异质性。跨境资本涌入和外逃会增加金融部门的系统性风险,且此时保险部门是各金融部门的风险源;跨境资本骤停和回撤会降低金融部门系统性风险,但资本骤停期间,证券部门是风险源,而资本回撤期间,房地产部门则构成了金融系统的风险隐患。

小麦玉米间作畦沟分灌作物根系生长特征研究

为探究小麦玉米间作与畦沟分灌灌水模式下作物根系的生长分布特征及对产量的影响,试验以间作常规畦灌模式为对照进行了对比研究。结果表明:沟灌玉米前期不灌溉,经历了水分亏缺的锻炼,在水势梯度作用下,刺激了根系的生长发育,下扎深度明显大于畦灌玉米;常规畦灌小麦表层0~60 cm垂向根干质量密度要显著大于畦沟分灌,根系更为发达。同时期沟灌玉米根系量要显著大于畦灌玉米,拔节期和抽雄吐丝期0~25 cm处平均值大22.76%和16.13%;常规畦灌小麦水平方向根干质量明显高于畦沟分灌小麦,且沟灌玉米灌水后随生育期延长,差异性减弱。受沟灌边行玉米的根系生长影响,常规畦灌小麦产量较畦沟分灌高9.92%;受根系生长补偿效应的刺激作用影响,沟灌玉米产量较常规畦灌高13.49%。

政策嵌入、空间重构与技术赋能:边境村建设的实践逻辑

建设什么样的乡村、怎样建设乡村是全面实现中国式现代化的重要议题。本研究以“嵌入性”为分析视角,从“政策—空间—技术”三个不同维度探赜云南边境幸福村建设的实践逻辑。研究发现,云南省遵循着“整体性”政策嵌入、“生产—生活—生态”空间重构、“数字建设—数字人才—数字应用”多元技术赋能的内在逻辑,有效推进了边境现代化幸福村建设,形塑了边民富、边疆美、边防固的乡村模范样板,为我国乡村建设贡献了具有启发性的实践经验。

卓越工程师跨界融合培养的问题、路径与策略

新一轮科学技术的变革和国家战略发展加大了对跨界工程技术人才的需求,行业企业需求与知识生产模式变革内在地要求卓越工程师具备工程专业能力和通用能力,而当前的跨界培养存在高校多学科培养计划落地有限、企业培养积极性有待提高和校企融合松散等问题。为此,卓越工程师的培养需要高校内部学科之间、高校与产业界之间的跨界融合。高校内部需要利用多学科优势制订跨学科培养方案、构建跨学科课程及采用项目式教学,通过校内导师提升学生专业理论水平;高校与产业之间需要加强融合,对接产业需求设置培养计划,设立产业实践项目提升学生工程实践能力,优选企业导师,发挥企业导师的实习指导作用。为保障上述具体路径的落实,需要完善顶层制度设计、变革课程教学模式和规范导师选拔规则。

中俄界约与清朝对西北边民归属的态度变化(1860—1894)

19世纪后期,伴随着中俄界约议订和边界划分,清朝对西北边民归属的态度发生了重要转变。同治初年,鉴于“地随人归”之恶果,清廷之态度从过去宽允藩属入界游牧而拒其内附,调整到确保边民各安其境。至1864年中俄《勘分西北界约记》签订,为防“人随地归”条款造成边民过度流失,清朝开始对新界外真心内附之边民予以接纳。中俄《改订条约》签订前后,针对俄方争民占地之图谋,清朝始则限制伊犁民人“自愿”迁居俄国,继则主张对边民实行真正“自愿迁居”。这一系列态度变化,影响到中俄界约签订和运作,并在一定程度上起到减少边民流失和疆土沦丧的作用。

非经济因素对边疆经济发展水平的影响研究

在经济高质量发展的背景下,非经济因素日益成为中国经济向高质量转型的关键一步。通过将非经济因素纳入经济考量中,形成正的反馈机制,以此实现边疆地区经济新的增长点。本文通过计量的方式,研究非经济因素对边疆地区经济发展的影响。用含有聚类稳健标准误的双向固定效应模型回归科技创新、教育、卫生、基础设施的非经济因。在异质性检验中将数据分为港口城市以及非港口城市,并检验港口贸易便利化对港口城市经济的影响。数据涵盖2009—2020年边疆87个地级市的9项指标。基准回归以及异质性检验结果表明,科技、教育、港口贸易便利化对经济产生了正向影响。为边疆地区经济高质量发展提供一些实证参考。

完善数字经济税收政策 促进新质生产力发展

数字经济的发展推动了中国经济高质量发展,并成为新质生产力发展的重要驱动力。同时,数字经济弱化了传统税制的适用性,对劳动、资本等课税要素及企业所得税、个人所得税、货物和劳务税等现有税种(税类)产生全方位的冲击,增加税基界定、评估、分配、追踪及管理的复杂性,导致税收管理难度增加和税基流失。此外,数字经济还改变了税收对于生产、消费、资源配置、社会公平等方面的调节作用机制。基于上述分析,建议通过完善税收体系、加强跨境税收合作与协调、推动税收征管数字化升级和智能化改造等措施,提升税制适配性与公平性,提高税收治理水平和管理效能,助力经济高质量发展和新质生产力的壮大。

Developmental Regulation and Biological Functions of Root Border Cells in Higher Plants

Root border cells, previously referred to as sloughed root cap cells, is a special cell population which separates in large numbers from the periphery of the root cap and accumulates in the root tip. Recent evidence reveals that border cells, whose development is regulated by endogenous and exogenous signals, are biologically viable in the majority of higher plant species. As soon as border cells detach from root cap periphery, their metabolic activity dramatically increases in accordance with a differential gene expression from that in root cap cells. Recently, PsUGT1 and RCPME1, relevant to the early and late stage of border cell development, respectively, have been cloned and functionally identified. Border cells can synthesize specially and export a diverse array of chemicals including anthocyanins, antibiotics, special enzymes and other substances, that either inhibit or promote the growth of other entities in rhizosphere such as bacteria, fungi, viruses, and nematodes, and also antagonize some toxic chemicals around the root tip in soil such as aluminum toxicity. Therefore, there are multiple biological roles played by border cells during plant growth and development.

中国—印尼跨境电子商务领域数字人文交流研究

在“一带一路”倡议的推动下,中国与印度尼西亚的跨境电子商务合作已成为促进两国经济合作和人文交流的重要渠道。文章通过探讨数字人文交流的新内涵及其在跨境电商中的重要作用,构建了中国—印尼跨境电商与人文交流的双向交融的新模式,为跨境电商与人文交流的协同发展提供了新思路,有利于推动双边跨境电商持续繁荣和丰富人文交流的内容内涵,深化两国命运共同体构建发展。

汉代西北边塞军人的“猎兽”行为

汉武帝《轮台诏》注意到西北边防吏卒职任不能切实履行的问题,症结在于“猎兽”。边塞军人“猎兽”行为,于简牍资料“野羊脯”“鹿”进入饮食生活的情形有所体现。“雉”“凫”“鸿”等被猎杀的禽鸟,于简文可见其价位记录,可知经历市场流通,直接与“利”相关联。于烽燧遗址出土汉简可见“兔”与野兔奔走的图画形象并出的情形。而汉代“雉兔”是常见猎物。烽燧遗址出土的“夹”“网”“投石”等猎具,也提示了当时边塞吏卒“猎兽”的方式。分析汉代西北边塞军人的“猎兽”行为,固然应当注意到汉武帝指责的“猎兽”行为导致正常防务弛怠的危害,但是也应当理解军中士兵通过“猎兽”或可改善日常饮食生活条件的动机。我们更为重视的,是通过相关考察认识当时边地社会生活的景象,了解丝绸之路交通的生态环境条件。