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Controlled flight of a self-powered micro blimp driven by insect-sized flapping-wing thrusters

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Chinese Journal of Aeronautics 2024年第6期37卷 127-136页

作者： xian yu Zhiwei LIU Jiaming LENG Mingjing QI Xiaojun YAN School of Energy and Power Engineering Beihang UniversityBeijing 100191China Collaborative Innovation Center of Advanced Aero-Engine Beijing 100191China National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics Beihang UniversityBeijng 100191China Beijing Key Laboratory of Aero-Engine Structure and Strength Beihang UniversityBeijing 100191China

Micro aerial platforms face significant challenges in achieving long controlled endurance as most of the energy is consumed to overcome the weight of the *** this study,we present a controllable micro blimp that addresses this issue through the use of a helium-filled *** micro blimp has a long axis of 23 cm and is propelled by four insect-sized flapping-wing thrusters,each weighing 80 mg and with a wingspan of 3.5 *** distributed thrusters enable controlled motions and provide the micro blimp with an advantage in flight endurance compared to multirotors or flapping-wing micro aerial vehicles at the same size *** enhance the performance of the controlled flight,we propose a wireless control module that enables manipulation from a distance of up to 100 ***,a smartphone application is developed to send instructions to the circuit board,allowing the blimp to turn left and right,ascend and descend,and achieve a combination of these movements *** findings demonstrate that this micro blimp is one of the smallest controlled self-powered micro blimps to date.

关键词： Microairvehicle Aircraft control Self-powered micro blimp Flapping-wing thruster Wireless flight

Risk assessment of oil and gas investment environment in countries along the Belt and Road Initiative

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Petroleum Science 2024年第2期21卷 1429-1443页

作者： Bao-Jun Tang Chang-Jing Ji yu-xian Zheng Kang-Ning Liu Yi-Fei Ma Jun-yu Chen Center for Energy and Environmental Policy Research Beijing Institute of TechnologyBeijing100081China School of Management and Economics Beijing Institute of TechnologyBeijing100081China Collaborative Innovation Center of Electric Vehicles in Beijing BeijingChina Sustainable Development Research Institute for Economy and Society of Beijing BeijingChina Institute of Carbon Neutrality ShanghaiTech UniversityShanghai201210China

With the implementation of the Belt and Road Initiative, China is deepening its cooperation in oil and gas resources with countries along the Initiative. In order to better mitigate risks and enhance the safety of investments, it is of significant importance to research the oil and gas investment environment in these countries for China's overseas investment macro-layout. This paper proposes an indicator system including 27 indicators from 6 dimensions. On this basis, game theory models combined with global entropy method and analytic hierarchy process are applied to determine the combined weights, and the TOPSIS-GRA model is utilized to assess the risks of oil and gas investment in 76 countries along the Initiative from 2014 to 2021. Finally, the GM(1,1) model is employed to predict risk values for 2022-2025. In conclusion, oil and gas resources and political factors have the greatest impact on investment environment risk, and 12 countries with greater investment potential are selected through cluster analysis in conjunction with the predicted results. The research findings may provide scientific decisionmaking recommendations for the Chinese government and oil enterprises to strengthen oil and gas investment cooperation with countries along the Belt and Road Initiative.

关键词： Belt and Road Initiative Oil and Gas Investment Risk assessment

Spin direction dependent quantum anomalous Hall effect in two-dimensional ferromagnetic materials

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Chinese Physics B 2024年第4期33卷 613-621页

作者：杨宇贤张昌文 School of Physics and Technology University of JinanJinan 250022China

We propose a scheme for realizing the spin direction-dependent quantum anomalous Hall effect(QAHE)driven by spin-orbit couplings(SOC)in two-dimensional(2D)*** on the sp^(3)tight-binding(TB)model,we find that these systems can exhibit a QAHE with out-of-plane and in-plane magnetization for the weak and strong SOC,respectively,in which the mechanism of quantum transition is mainly driven by the band inversion of p_(x,y)/p_(z)*** a concrete example,based on first-principles calculations,we realize a real material of monolayer 1T-SnN_(2)/PbN_(2)exhibiting the QAHE with in-plane/out-of-plane magnetization characterized by the nonzero Chern number C and topological edge *** findings provide useful guidance for the pursuit of a spin direction-dependent QAHE and hence stimulate immediate experimental interest.

关键词： topological phase transition quantum anomalous Hall effect first-principles calculations

Network Pharmacology of xian-Lian-Jie-Du Decoction in Ameliorating Colorectal Cancer

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World Journal of Traditional Chinese Medicine 2024年第1期10卷 83-92页

作者： Ming-Xia Zhao Cheng-Lin Song Qin-Chang Zhang Hao-Jie Du Shu-Qiong Zhang yu-xian Shen Yang Sun Hai-Bo Cheng Wen Lv Department of Pharmacy School of Basic Medical SciencesAnhui Medical UniversityHefeiAnhuiChina Department of Biopharmaceutical Research Institute Anhui Medical UniversityHefeiAnhuiChina Department of Pharmaceutical Analysis State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking UniversityBeijingChina Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine in Prevention and Treatment of Tumor First Clinical CollegeNanjing University of Chinese MedicineNanjingJiangsuChina Deparment of Biotechnology and Pharmaceutical Sciences State Key Laboratory of Pharmaceutical BiotechnologySchool of Life SciencesNanjing UniversityNanjingJiangsuChina Deparment of Gynecology Institute of Traditional Chinese Medicine of Zhejiang ProvinceTongde Hospital of Zhejiang ProvinceHangzhouZhejiangChina

Objective:In this study,we screened for therapeutic targets of the xian-Lian-Jie-Du decoction(XLJDD)for colorectal cancer(CRC)and explored the underlying mechanisms using network pharmacology ***:Genes associated with CRC were collected from the Gene Cards *** names of the active compounds of XLJDD were used as keywords in the“chemical name”in the Traditional Chinese Medicine Systems Pharmacology(TCMSP)database to search the *** protein-protein interaction(PPI)network was constructed using Cytoscape *** Ontology functional enrichment and Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway enrichment analyses were performed to identify key target ***:A total of 234 XLJDD-related targets and 250 cross-targets between XLJDD and CRC were collected based on the TCMSP and HIT 2.0 databases.A PPI network constructed based on the STRING database revealed interactions for all 250 *** network results revealed TP53,MYC,CCND1,AKT1,CASP3,and STAT3 as core potential *** pathway analysis of the 250 potential XLJDD targets for CRC in the Metascape database was performed using RStudio *** top 12 gene ratio aggregated analysis results were visualized in bubble *** interleukin(IL)-17 signaling pathway had the highest correlation with the tumor necrosis factor(TNF)signaling ***:XLJDD may be effective in ameliorating CRC by controlling inflammatory factors related to the IL-17 and TNF pathways and targeting proto-oncogenes and tumor suppressor genes,including MYC,CCND1,CTNNB1,and TP53.

关键词： Colorectal cancer network pharmacology xian-Lian-Jie-Du decoction

硫代乙酰胺诱导的小鼠肝内胆管癌模型特点研究

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中国药理学通报 2024年第5期40卷 992-998页

作者：张玉梅琼沈玉先安徽医科大学基础医学院药理学教研室生物药物研究所安徽合肥230032

目的建立硫代乙酰胺(thioacetamide,TAA)诱导的小鼠肝内胆管癌(intrahepatic cholangiocarcinoma,ICC)模型并探讨该模型的特点及形成机制,为ICC的病理机制和治疗药物的研究提供实验基础。方法C57BL/6J小鼠分为正常对照组和TAA组,正常对... 详细信息

目的建立硫代乙酰胺(thioacetamide,TAA)诱导的小鼠肝内胆管癌(intrahepatic cholangiocarcinoma,ICC)模型并探讨该模型的特点及形成机制,为ICC的病理机制和治疗药物的研究提供实验基础。方法C57BL/6J小鼠分为正常对照组和TAA组,正常对照组小鼠饮用灭菌水,模型组小鼠饮用600 mg·L^(-1)的TAA溶液,连续饮用32周。眼球取血,检测血清中ALT、AST、DBIL和TBIL的水平;观察两组小鼠肝脏形态;HE、天狼猩红、Masson和普鲁士蓝染色观察肝脏组织病理改变;免疫组化检测CK7、CK19、Ki67、CD68、TNF-α和α-SMA的表达水平;RT-qPCR和Western blot检测ICC相关标志物mRNA和蛋白的水平;免疫荧光双标记检测肝脏组织中HNF4α+CK19+双阳性细胞。结果与正常对照组比较,TAA组小鼠肝脏表面呈细颗粒状、质硬,肝内呈肿块性病变;病理检查结果显示,肝组织有炎症细胞浸润,肿瘤细胞排列成管状,肝组织有明显的纤维化;血清中ALT、AST、DBIL和TBIL水平升高;肝脏组织中ICC标志物CK7、CK19及细胞增殖标志物Ki67表达上调;免疫细胞标志分子CD68和TNF-α表达增多,肝星状细胞活化标志物α-SMA的阳性染色增多;肝组织中出现HNF4α+CK19+双表型细胞。结论TAA可用于诱导小鼠ICC模型,该模型具有炎症免疫细胞浸润、纤维化及ICC分子标志物增高等特点,这与人类的ICC非常相似,可用于评价内源性分子和外源性药物对ICC作用的研究。

关键词：硫代乙酰胺肝内胆管癌小鼠模型肝纤维化炎症

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基于ICP-MS研究转炉钢渣微粉吸附镍和铅的动力学机理

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光谱学与光谱分析 2024年第2期44卷 594-600页

作者：徐修平徐维成于先坤陈煜杨刚张浩金属矿山安全与健康国家重点实验室安徽马鞍山243000 冶金减排与资源综合利用教育部重点实验室(安徽工业大学) 安徽马鞍山243002 中钢集团马鞍山矿山研究院股份有限公司安徽马鞍山243000 南京农业大学草业学院江苏南京210095 中冶宝钢技术服务有限公司上海201999 安徽工业大学冶金工程学院安徽马鞍山243032

随着工业化的发展,水体和土壤中的重金属污染日益严重。其中,重金属镍是一种常见的致敏性金属,会引起人体过敏发炎,甚至会引发癌症;血液中铅浓度的超标会危害人的神经系统、心血管系统和生殖系统,造成终身性的危害。因此,治理镍和铅重... 详细信息

随着工业化的发展,水体和土壤中的重金属污染日益严重。其中,重金属镍是一种常见的致敏性金属,会引起人体过敏发炎,甚至会引发癌症;血液中铅浓度的超标会危害人的神经系统、心血管系统和生殖系统,造成终身性的危害。因此,治理镍和铅重金属污染具有十分重要的意义。钢渣是炼钢过程中产生的一种副产物,其存在难以利用与附加值低的问题。同时加之管理制度的不健全,导致大量钢渣露天堆放,对土地资源、地下水源,以及空气质量造成严重影响。钢渣微粉具有比表面积大、多孔、化学活性高等特性,被广泛利用,可以成为吸附材料。本文以转炉钢渣微粉为研究对象,利用激光粒度仪、电感耦合等离子体质谱仪、比表面积与孔隙度吸附仪、X射线荧光光谱仪等测试转炉钢渣微粉的基本性质,重点研究转炉钢渣微粉添加量、重金属初始浓度、溶液pH和吸附时间对转炉钢渣微粉吸附Ni^(2+)、Pb^(2+)的效果,结合吸附动力学与吸附等温线理论揭示转炉钢渣微粉对Ni^(2+)、Pb^(2+)的吸附作用机理,为处理镍、铅重金属污染和工业废水处理提供技术支持与理论依据。结果表明:当转炉钢渣微粉添加量大于12.5 g·L^(-1)、重金属初始浓度小于100 mg·L^(-1)、溶液pH大于3和吸附时间大于120 min时,转炉钢渣微粉对Ni^(2+)、Pb^(2+)的吸附效果良好,即基本达到90%。转炉钢渣微粉对Ni^(2+)、Pb^(2+)的吸附符合准二级动力学模型,吸附速率由边界扩散和颗粒内扩散共同控制,吸附过程以化学吸附为主。转炉钢渣微粉的结构具有多孔性为物理吸附Ni^(2+)、Pb^(2+)提供吸附空间,转炉钢渣微粉的化学成分不仅具有碱性与Ni^(2+)、Pb^(2+)形成络合产物,而且水化过程中CaO与SiO_(2)生成C—S—H凝胶,对Ni^(2+)、Pb^(2+)形成络合吸附与硅酸盐体系包裹。转炉钢渣微粉对Ni^(2+)、Pb^(2+)吸附可能存在多层吸附。吸附Ni^(2+)、Pb^(2+)的过程为优惠吸附,吸附容易进行,其理论最大吸附量分别为18.785和17.002 mg·g^(-1)。

关键词： ICP-MS 转炉钢渣微粉 Ni2+ Pb2+ 吸附动力学

Research on BIM Model Reshaping Method Based on 3D Point Cloud Recognition

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印刷与数字媒体技术研究 2024年第4期 125-135页

作者： SHI Jin-yu yu xian-feng SI Zhan-jun ZHANG Ying-xue College of Artificial Intelligence Tianjin University of Science and TechnologyTianjin 300457China

In view of the limitations of traditional measurement methods in the field of building information,such as complex operation,low timeliness and poor accuracy,a new way of combining three-dimensional scanning technology and BIM(Building Information Modeling)model was *** on the efficient acquisition of building geometric information using the fast-developing 3D point cloud technology,an improved deep learning-based 3D point cloud recognition method was *** method optimised the network structure based on RandLA-Net to adapt to the large-scale point cloud processing requirements,while the semantic and instance features of the point cloud were integrated to significantly improve the recognition accuracy and provide a precise basis for BIM model *** addition,a visual BIM model generation system was developed,which systematically transformed the point cloud recognition results into BIM component parameters,automatically constructed BIM models,and promoted the open sharing and secondary development of *** research results not only effectively promote the automation process of converting 3D point cloud data to refined BIM models,but also provide important technical support for promoting building informatisation and accelerating the construction of smart cities,showing a wide range of application potential and practical value.

关键词： 3D point cloud RandLA-Net network BIM model OSG engine

Efficacy of percutaneous mechanical thrombus removal in acute lower extremity deep venous thrombosis

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World Journal of Clinical Cases 2024年第21期12卷 4590-4600页

作者： Jun-Qiang Xue Ping Yin Jian-Ping He Hui Wei Cui-Jie Geng yu-xian Luo Department of Vascular Surgery Shijiazhuang People's HospitalShijiazhuang 050011Hebei ProvinceChina Department of Laboratory Medicine Shijiazhuang Hospital of Traditional Chinese MedicineShijiazhuang 050011Hebei ProvinceChina Catheter Room Shijiazhuang People's HospitalShijiazhuang 050011Hebei ProvinceChina

BACKGROUND Acute lower extremity deep venous thrombosis(LEDVT)is a common vascular emergency with significant morbidity risks,including post-thrombotic syndrome(PTS)and pulmonary *** treatments like catheter-directed thrombolysis(CDT)often result in variable success rates and *** To investigate the therapeutic efficacy of percutaneous mechanical thrombus removal in acute *** A retrospective analysis was performed to examine 58 hospitalised patients with acute LEDVT between August 2019 and August *** patients were categorised into the percutaneous mechanical thrombectomy(PMT)group(n=24)and CDT group(n=32).The follow-up,safety and treatment outcomes were compared between the two *** main observational indexes were venous patency score,thrombus removal effect,complications,hospitalisation duration and *** The venous patency score was 9.04±1.40 in the PMT group and 8.81±1.60 in the CDT group,and the thrombus clearance rate was 100%in both *** complication rate was 8.33%in the PMT group and 34.84%in the CDT group,and the difference was statistically significant(P<0.05).The average hospitalisation duration was 6.54±2.48 days in the PMT group and 8.14±3.56 days in the CDT *** incidence of PTS was lower in the PMT group than in the CDT group;however,the difference was not statistically significant(P<0.05).CONCLUSION Compared with CDT,treatment of LEDVT via PMT was associated with a better thrombus clearance rate,clinical therapeutic effect and PTS prevention function,but the difference was not statistically ***,PMT was associated with a reduced urokinase dosage,shortened hospitalisation duration and reduced incidence of complications,such as infections and small *** results indicate that PMT has substantial beneficial effects in the treatment of LEDVT.

关键词： Post-thrombotic syndrome Catheter-directed thrombolysis Percutaneous mechanical thrombectomy Acute lower extremity deep venous thrombosis

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国家安全的情感逻辑:一项理论性分析

东北亚论坛 2024年第5期33卷 34-48,127页

作者：尹继武贾宇娴中国人民大学国际关系学院北京100872

既有国家安全的研究大多将国家安全状态与过程看作是国家理性建构的结果,忽视了情感因素的重要作用。情感因素可以影响到国家安全信念、国家安全决策、安全共同体和国家安全状态四个环节。亦即国家情感和领导人情感会影响国家安全信念... 详细信息

既有国家安全的研究大多将国家安全状态与过程看作是国家理性建构的结果,忽视了情感因素的重要作用。情感因素可以影响到国家安全信念、国家安全决策、安全共同体和国家安全状态四个环节。亦即国家情感和领导人情感会影响国家安全信念的生成,民众与领导人的情感既能够塑造国家安全决策的制定过程,又可以策略性地推动国家安全政策的落实。国家间的情感依恋和情感信任有助于推动安全共同体的构建与维系。领导精英的情绪控制和运用能力可以促进国家安全状态的达成,因为愤怒与仇恨等原生性情感可能引发国家间冲突,而工具性情感在特定条件下则可以促成国家间的合作。厘清国家安全的情感逻辑有利于完善国家安全理论体系,同时也有助于更加深刻地理解总体国家安全观与全球安全倡议的价值,为实现上述中国的安全方案提供可行的微观路径。

关键词：国家安全情感逻辑安全决策安全共同体总体国家安全观