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Attenuation of Richtmyer-Meshkov instability growth of fluid layer via double shock

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Science China(Physics,Mechanics & Astronomy) 2025年第04期Mechanics & Astronomy) .卷 148-155页

作者： Chenren Chen Jiaxuan li He wang Zhigang Zhai xisheng Luo Advanced Propulsion Laboratory Department of Modern Mechanics University of Science and Technology of China State Key Laboratory of High-Temperature Gas Dynamics Institute of Mechanics Chinese Academy of Sciences

Suppression of the hydrodynamic instabilities involved in the inertial confinement fusion has attracted much attention but remains a challenge. In this work, we report the first theoretical analysis and experimental validation on attenuating the instability growth of a shock-accelerated fluid layer through a second shock impact. An analytical model is established to predict linear growth rates of the perturbations at two interfaces of the layer by considering both the effects of interface coupling and reverberating waves. Theoretically, there are nine possibilities for simultaneously attenuating the instability growths of perturbations at the two interfaces. Accordingly, shock-tube experiments are specially designed and conducted, and nine possibilities are all realized by experiments, which verifies the reliability of the analytical model and also demonstrates the feasibility of attenuating the instability growth of a fluid layer via double shock.

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思想政治教育学原理研究的思路创新

教学与研究 2025年第2期 58-67页

作者：王习胜安徽师范大学马克思主义学院安徽芜湖241002

在思想政治教育学科大厦中,思想政治教育学原理居于基础性地位,以其特有的普遍性、根本性和稳定性而发挥着基石性作用。思想政治教育学原理的普遍性、根本性和稳定性并不排斥其创新性。面对思想政治教育发展的时代要求,思想政治教育学... 详细信息

在思想政治教育学科大厦中,思想政治教育学原理居于基础性地位,以其特有的普遍性、根本性和稳定性而发挥着基石性作用。思想政治教育学原理的普遍性、根本性和稳定性并不排斥其创新性。面对思想政治教育发展的时代要求,思想政治教育学原理需要吐故纳新以蓬勃其生命活力,需要以自我革命的勇气实现理论形态和原理形象的进阶迭代。从思想政治教育学原理的现状看,其未来的创新路向大致有三:一是吸收思想政治教育基础理论研究的新近成果,提炼思想政治教育实践经验,对原理中的核心概念、基本结构和解释能力等进行完善与提升,使其核心概念更能体现学科特质、基本结构更具逻辑自洽、理论体系更有实践指导力和学理解释力;二是拓展思想政治教育学原理的研究范式,在社会哲学和人学范式的基础上以新范式建构更为精准的思想政治教育学原理体系;三是变革思想政治教育学原理研究纲领的“硬核”,特别是要对思想政治教育学核心范畴的认识进行自我革命,以“新硬核”构建思想政治教育学原理的“新纲领”。

关键词：思想政治教育思想政治教育学原理思想政治教育学原理创新

Improvement of Boxcar Integrator and Its Application to Low Resistance Measurement of Inductive Load Coil

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International Journal of Minerals,Metallurgy and Materials 1998年第3期12卷 180-184页

作者： xisheng li shaochun wang(Information Engineering School, University of Science and Technology Beijing, Beijing 100083, China) Information Engineering School University of Science and Technology Beijing Beijing 100083 China

A boxcar integrator is described which is suitable for the low-repetition-rate signal processing. This boxcar integrator, named fixed-interval mode boxcar integrator, is able to reject harmonics other than the first harmonic component. It can also decrease the effective time constant In many situations, the antialiasing filter with narrow bandwidth will cause distortion of the input signal. The fixed-interval mode boxcar integrator with suitable gate width can achieve relative high performance without signal distortion because the bandwidth of its antialiasing filter can be wider than that in the fixed-Point boxcar integrator. ms boxcar integrator is used as majn part of signalprocessing circult in the low resisance measurement of inductive load coil. The results of experiments show that the fixed-interval boxcar integrator is suitable for low-repetition-rate use.

关键词： signal processing resistance measurement boxcar integrator

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高校数字党建的媒介动能与实践进路

思想政治教育研究 2025年第1期41卷 131-136页

作者：樊帅领王习胜安徽理工大学机电工程学院安徽淮南232001 安徽师范大学马克思主义学院安徽芜湖241002

以数字技术提升高校党建媒介动能,是培育新时代好青年、创新高校党建工作、推进高等教育数字化的应然举措。高校数字党建要明晰政治仪式、影像视频、沉浸场景等媒介动能及其叙事机理,推动目标驱动和价值引领相协同,推进安全预警前置和... 详细信息

以数字技术提升高校党建媒介动能,是培育新时代好青年、创新高校党建工作、推进高等教育数字化的应然举措。高校数字党建要明晰政治仪式、影像视频、沉浸场景等媒介动能及其叙事机理,推动目标驱动和价值引领相协同,推进安全预警前置和功能融合汇聚相贯通,坚定正确政治方向和系统迭代升级相融合,使数字技术这一媒介动能变量成为党建高质量发展的增量。以主体韬养演绎“有意识”的媒介赋能主导,以符号涵养强化“非形态”的媒介叙事隐喻,以信仰滋养夯实“系统化”的媒介动能笃行,优化数字党建媒介动能进路。以数字基座驱动跨媒介耦合,以数字化胜任力协同强化媒介动能,以范式共生推动媒介动能系统化集束,推动高校数字党建提质增效。

关键词：高校数字党建媒介动能实践进路人文关怀

Sawtooth-enhanced bend sensor for gesture recognition

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Science China(Technological Sciences) 2024年第6期67卷 1727-1736页

作者： BAI YanRu ZHANG ZiHang wang HaoYu GUO Rui li xisheng School of Automation and Electrical Engineering University of Science and Technology BeijingBeijing100083China School of Advanced Engineering University of Science and Technology BeijingBeijing100083China School of Precision Instrument and Opto-Electronics Engineering Tianjin UniversityTianjin300072China School of Computer and Communication Engineering University of Science and Technology BeijingBeijing100083China

Gesture recognition has diverse application prospects in the field of human-computer ***,gesture recognition devices based on strain sensors have achieved remarkable results,among which liquid metal materials have considerable advantages due to their high tensile strength and *** improve the detection sensitivity of liquid metal strain sensors,a sawtooth-enhanced bending sensor is proposed in this *** with the results from previous studies,the bending sensor shows enhanced resistance *** addition,combined with machine learning algorithms,a gesture recognition glove based on the sawtooth-enhanced bending sensor is also fabricated in this study,and various gestures are accurately *** the fields of human-computer interaction,wearable sensing,and medical health,the sawtooth-enhanced bending sensor shows great potential and can have wide application prospects.

关键词： liquid metal bending sensor gesture recognition machine learning

Professor wang xisheng's Thoughts on Tumors and"Fu Yuan Fu Heng Method"for the Treatment of Malignant Tumors

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Proceedings of Anticancer Research 2021年第3期5卷 4-6页

作者： Zhengyang Chen xisheng wang Graduate School of Shaanxi University of Traditional Chinese Medicine Xianyang 712000China Affiliated Hospital of Shaanxi University of Traditional Chinese Medicine Xianyang 712000China

According to the report of the National Cancer Center,there are about 4.5 million new cancer patients and 3 million deaths in China every *** to effectively implement a comprehensive system of prevention and control measures and reduce the incidence rate of malignant tumors in the country,so that the mortality rate of cancer is effectively controlled is a problem that needs to be solved *** particular,it is worth mentioning that in China,the addition of traditional Chinese medicine in the treatment of malignant tumor plays an important role in improving the therapeutic effect,reducing the toxic and side effects of comprehensive treatment,improving the quality of life,and"survival with tumor"of end-stage cancer *** wang xisheng has been engaged in the field of traditional Chinese medicine in the treatment of cancer for more than 40 *** his long-term clinical practice,he has accumulated rich experience in the prevention and treatment of malignant *** article introduces Professor wang's thinking on cancer in clinical practice and the"Fu Yuan Fu Heng method"in the treatment of malignant tumors for reference.

关键词： Thinking about tumor Fuyuan Fuheng Decoction Cancer treatment

Vegetation Index Reconstruction and linkage with Drought for the Source Region of the Yangtze River Based on Tree-ring Data

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Chinese Geographical Science 2021年第4期31卷 684-695页

作者： li Jinjian wang Shu QIN Ningsheng liU xisheng JIN liya School of Atmospheric Sciences Plateau Atmosphere and Environment Key Laboratory of Sichuan ProvinceChengdu University of Information TechnologyChengdu 610225China Institute of Plateau Meteorology China Meteorological AdministrationChengdu/Heavy Rain and Drought-Flood Disasters in Plateau and BasinKey Laboratory of Sichuan ProvinceChengdu 610072China Hydrology and Water Resources Bureau of Qinghai Province Xining 810000China

Variations in vegetation are closely related to climate change, but understanding of their characteristics and causes remains limited. As a typical semi-humid and semi-arid cold plateau region, it is important to understand the knowledge of long term Normalized Difference Vegetation Index(NDVI) variations and find the potential causes in the source region of the Yangtze River. Based on four tree-ring width chronologies, the regional mean NDVI for July and August spanning the period 1665–2013 was reconstructed using a regression model, and it explained 43.9% of the total variance during the period 1981–2013. In decadal, the reconstructed NDVI showed eight growth stages(1754–1764, 1766–1783, 1794–1811, 1828–1838, 1843–1855, 1862–1873, 1897–1909, and 1932–1945)and four degradation stages(1679–1698, 1726–1753, 1910–1923, and 1988–2000). And based on wavelet analysis, significant cycles of2–3 yr and 3–8 yr were identified. In additional, there was a significant positive correlation between the NDVI and the Palmer Drought Severity Index(PDSI) during the past 349 yr, and they were mainly in phase. However, according to the results of correlation analysis between different grades of drought/wet and NDVI, there was significant asymmetry in extreme drought years and extreme wet years. In extreme drought years, NDVI was positively correlated with PDSI, and in extreme wet years they were negatively correlated.

关键词： Normalized Difference Vegetation Index(NDVI) reconstruction dendrochronology tree ring Source Region of the Yangtze River

Geochronology and geochemistry of gneissic metagranites in eastern Dabie Mountains:Implications for the Neoproterozoic tectono-magmatism along the northeastern margin of the Yangtze Block

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Science China Earth Sciences 2010年第4期53卷 501-517页

作者： Jian Hu JianSheng Qiu xisheng Xu XiaoLei wang Zhen li Nanjing Univ State Key Lab Mineral Deposits Res Nanjing 210093 Peoples R China

The gneissic metagranites with Neoproterozoic protolith ages are widely exposed along the eastern margin of the Dabie ultra-high-pressure(UHP) metamorphic *** this paper,five representative plutons,including Huangzhen,Daba,Shima,Shuanghe,and Sanzusi,were selected for a detailed chronological and geochemical study aiming to identify the nature of the protoliths and to reveal their implications for the Neoproterozoic tectono-magmatic evolution along the northeastern margin of the Yangtze *** gneissic metagranites consist mainly of quartz,albite(oligoclase) and K-feldspar,and minor amphibole and biotite,as well as some metamorphic minerals due to the UHP metamorphism,such as phengite,epidote and minor kyanite and *** alkaline minerals(e.g.,aegirine or aegirine-augite) have been observed in some of these *** LA-ICP-MS U-Pb dating results indicate that the protoliths of the gneissic metagranites have been generated in Mid-Neoproterozoic(770-780 Ma),and suffered both ultrahigh-pressure metamorphism in Early Mesozoic and subsequently high-pressure eclogite-facies recrystallization at about 215 *** the gneissic metagranites generally have high SiO2 contents(70.23%-77.23%) and show metaluminous-weakly peraluminous signatures(ASI=0.90-1.05),there are still some geochemical variances between different *** with the Sanzusi pluton,the metagranites from the Huangzhen,Daba,Shima,and Shuanghe have high K2O+Na2O contents(7.76%-9.45%),FeOtotal/(FeOtotal+MgO) ratios(0.82-0.96),HFSEs and Ga concentrations with an average 104×Ga/Al ratio up to *** with the features that the four plutons commonly contain aegirine-augite and have high zircon saturation temperatures(816-918°C),it is suggested that their proto-liths belong to peralkaline A-type *** Sanzusi pluton generally contains biotite and epidote generated from metamorphic reaction of amphibole,and is chemically enriched in calcium and depleted in potassium with K2

关键词： gneissic metagranite zircon U-Pb chronology geochemistry tectono-magmatism eastern margin of Dabie Mountains

款冬花药用与非药用部位中6种活性成分比较研究

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中国药物警戒 2025年第1期22卷 67-71页

作者：昝珂蔡喜生吴芸王赵王丹丹李海亮金红宇中国食品药品检定研究院中药民族药检定所北京102629 通化市食品药品检验所中药室吉林通化134001 泰州市药品检验院中药室江苏泰州225300

目的比较款冬花药用和非药用部位中6种活性成分含量差异。方法建立高效液相色谱法同时测定款冬花不同部位中绿原酸、芦丁、3,4-O-二咖啡酰奎宁酸、3,5-O-二咖啡酰奎宁酸、4,5-O-二咖啡酰奎宁酸、款冬酮等6种成分的含量。采用ShimNex CS ... 详细信息

目的比较款冬花药用和非药用部位中6种活性成分含量差异。方法建立高效液相色谱法同时测定款冬花不同部位中绿原酸、芦丁、3,4-O-二咖啡酰奎宁酸、3,5-O-二咖啡酰奎宁酸、4,5-O-二咖啡酰奎宁酸、款冬酮等6种成分的含量。采用ShimNex CS C_(18)(4.6 mm×250 mm,5μm)色谱柱,流动相为乙腈-0.1%磷酸水溶液,梯度洗脱,检测波长为220 nm,流速为1 mL·min^(-1),柱温为30℃。结果芦丁和款冬酮在款冬花的花梗和根中均未检出,其余4种咖啡酰奎宁酸类成分也均低于花蕾。结论验证了款冬花药材以花蕾入药的科学性和合理性,非药用部位的混入会影响该药材质量,建议在质量标准中增加杂质检查项目,确保药材的质量。

关键词：款冬花药用部位非药用部位款冬酮活性成分 3,5-O-二咖啡酰奎宁酸 4,5-O-二咖啡酰奎宁酸高效液相色谱含量测定

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