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Scattering of Water Waves by Dual Symmetric Inclined Floating Porous Barriers Using the DBEM

China Ocean Engineering 2024年第1期38卷 156-168页

作者： WANG Li-xian deng Yan-wen YE Yang-sha deng zheng-zhi Key Laboratory of High Performance Ship Technology(Wuhan University of Technology) Ministry of EducationWuhan 430063China School of Naval Architecture Ocean and Energy Power EngineeringWuhan University of TechnologyWuhan 430063China Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province Changsha 410114China Institute of Port Coastal and Offshore EngineeringZhejiang UniversityZhoushan 316021China

The scattering of normally incident water waves by two surface-piercing inclined perforated barriers in water with a uniform finite depth is investigated within the framework of linear water wave *** that thin barriers are zero-thickness,a novel numerical method involving the the coupling of the dual boundary element method(DBEM)with damping layers is *** order to effectively damp out the reflected waves,two damping layers,instead of pseudoboundaries are implemented near the two side boundaries of the computational ***,the modified linearized free surface boundary conditions are formulated and used for solving both the ordinary boundary integral equation as well as the hypersingular boundary integral equation for degenerate *** newly developed numerical method is validated against analytical methods using the matched eigenfunction expansion method for the special case of two vertical barriers or the inclined angle to the vertical being *** influence of the length of the two damping layers has been ***,these findings are also validated against previous results for several *** validation,the numerical results for the reflection coefficient,transmission coefficient and dissipation coefficient are obtained by varying the inclination angle and porosity-effect *** effects of both the inclination angle and the porosity on the amplitudes of wave forces acting on both the front and rear barriers are also *** is found that the effect of the inclination angle mainly shifts the location of the extremal values of the reflection and the transmission ***,a moderate value of the porosity-parameter is quite effective at dissipating wave energy and mitigating the wave loads on dual barriers.

关键词： dual boundary element method inclined perforated floating breakwater reflection coefficient transmission coefficient damping layer

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Anomalous bond lengthening in compressed magnetic doped semiconductor Ba(Zn_(0.95)Mn_(0.05))_(2)As_(2)

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Journal of Semiconductors 2024年第4期45卷 36-41页

作者： Fei Sun Yi Peng Guoqiang Zhao Xiancheng Wang zheng deng Changqing Jin Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Physics University of Chinese Academy of SciencesBeijing 101408China Center for High Pressure Science and Technology Advanced Research Beijing 100094Chin

Applying pressure has been evidenced as an effective method to control the properties of semiconductors,owing to its capability to modify the band configuration around Fermi ***,structural evolutions under external pres-sures are required to analyze the *** high-pressure structure of a magnetic doped semiconductor Ba(Zn_(0.95)Mn_(0.05))_(2)As_(2)is studied with combination of in-situ synchrotron X-ray diffractions and diamond anvil *** materials become ferromagnetic with Curie temperature of 105 K after further 20%K *** title material undergoes an isostruc-tural phase transition at around 19 *** the transition pressure,it is remarkable to find lengthening of Zn/Mn-As bond within Zn/MnAs layers,since chemical bonds are generally shortened with applying *** with the bond stretch,interlayer As-As distances become shorter and the As-As dimers form after the phase *** further compres-sion,Zn/Mn-As bond becomes shortened due to the recovery of isotropic compression on the Zn/MnAs layers.

关键词： magnetic semiconductor high-pressure in-situ X-ray diffraction phase transition

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Defect-manipulated magnetoresistance and above-room-temperature ferromagnetism in two-dimensional BaNi_(2)V_(2)O_(8)

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Chinese Chemical Letters 2024年第3期35卷 523-527页

作者： Pengfei Tan Chuanhui Zhu Jinjin Yang Shuang Zhao Tao Xia Mei-Huan Zhao Tao Han zheng deng Man-Rong Li Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of ChemistrySun Yat-sen UniversityGuangzhou 510006China School of Science and Engineering The Chinese University of Hong KongShenzhen 518172China Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Science Hainan UniversityHaikou 570228China

The intricate correlation between multiple degrees of freedom and physical properties is a fascinating area in solid state chemistry and condensed matter ***,we report a quantum-magnetic system BaNi_(2)V_(2)O_(8)(BNVO),in which the spin correlation was modulated by unusual oxidation state,leading to different magnetic *** BNVO was modified with topochemical reduction(TR)to yield TR-BNVO with partially reduced valance state of Ni^(+)in the two-dimensional NiO_(6)-honeycomb ***,the antiferromagnetic order is suppressed by the introduction of locally interposed Ni^(+)and oxygen vacancies,resulting in a ferromagnetic ground state with the transition temperature up to 710 K.A positive magnetoresistance(7.5%)was observed in the TR-BNVO at 40 K under 7 *** findings show that topological reduction is a powerful approach to engineer low-dimensional materials and accelerate the discovery of new quantum magnetism.

关键词： Layered honeycomb oxide Topochemical reduction Oxygen vacancies Ferromagnetism Magnetoresistance

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Self-fueling ferroptosis-inducing microreactors based on p H-responsive Lipiodol Pickering emulsions enable transarterial ferro-embolization therapy

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National Science Review 2024年第1期11卷 74-85页

作者： Chunjie Wang Lei Zhang Zhijuan Yang Dongxu Zhao zheng deng Jialu Xu Yumin Wu Yu Hao Ziliang Dong Liangzhu Feng Zhuang Liu Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Soochow University Center of Interventional Radiology & Vascular Surgery Department of Radiology Zhongda Hospital Medical School Southeast University Department of Interventional Radiology The First Afflliated Hospital of Soochow University

Lipiodol chemotherapeutic emulsions remain one of the main choices for the treatment of unresectable hepatocellular carcinoma(HCC) via transarterial chemoembolization(TACE). However, the limited stability of Lipiodol chemotherapeutic emulsions would lead to rapid drug diffusion, which would reduce the therapeutic benefit and cause systemic toxicity of administrated chemotherapeutics. Therefore, the development of enhanced Lipiodol-based formulations is of great significance to enable effective and safe TACE treatment. Herein, a stable water-in-oil Lipiodol Pickering emulsion(LPE) stabilized by pH-dissociable calcium carbonate nanoparticles and hemin is prepared and utilized for efficient encapsulation of lipoxygenase(LOX). The obtained LOX-loaded CaCO3&hemin-stabilized LPE(LHCa-LPE) showing greatly improved emulsion stability could work as a pH-responsive and self-fueling microreactor to convert polyunsaturated fatty acids(PUFAs), a main component of Lipiodol, to cytotoxic lipid radicals through the cascading catalytic reaction driven by LOX and hemin, thus inducing ferroptosis of cancer cells. As a result, such LHCa-LPE upon transcatheter embolization can effectively suppress the progression of orthotopic N1S1 HCC in rats. This study highlights a concise strategy to prepare pH-responsive and stable LPE-based self-fueling microreactors, which could serve as bifunctional embolic and ferroptosis-inducing agents to enable proof-of-concept transarterial ferro-embolization therapy of HCC.

关键词： CaCO3 nanoparticles Pickering emulsion ferroptosis lipid peroxidation transarterial ferro-embolization

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Novel magnetic compression technique for the treatment of postoperative anastomotic stenosis in rectal cancer:A case report

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World Journal of Gastrointestinal Surgery 2024年第6期16卷 1926-1932页

作者： Miao-Miao Zhang Huan-Chen Sha Hai-Rong Xue Yuan-Fa Qin Xiao-Gang Song Yun Li Yu Li zheng-Wu deng Yu-Lin Gao Fang-Fang Dong Yi Lyu Xiao-Peng Yan Department of Hepatobiliary Surgery The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061Shaanxi ProvinceChina Department of Shaanxi Provincial Key Laboratory of Magnetic Medicine The First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an 710061Shaanxi ProvinceChina Department of National Local Joint Engineering Research Center for Precision Surgery&Regenerative Medicine The First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an 710061Shaanxi ProvinceChina Department of Gastroenterology The First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an 710061Shaanxi ProvinceChina

BACKGROUND The treatment of postoperative anastomotic stenosis after excision of rectal cancer is *** balloon dilation and radial incision are not effective in all *** present a new endoscopy-assisted magnetic compression technique(MCT)for the treatment of rectal anastomotic *** successfully applied this MCT to a patient who developed an anastomotic stricture after radical resection of rectal cancer.A 50-year-old man had undergone laparoscopic radical rectal cancer surgery at a local hospital 5 months ago.A colonoscopy performed 2 months ago indicated that the rectal anastomosis was narrow due to which ileostomy closure could not be *** patient came to the Magnetic Surgery Clinic of the First Affiliated Hospital of Xi'an Jiaotong University after learning that we had successfully treated patients with colorectal stenosis using *** performed endoscopy-assisted magnetic compression surgery for rectal *** magnets were removed 16 d later.A follow-up colonoscopy performed after 4 months showed good anastomotic patency,following which,ileostomy closure surgery was *** MCT is a simple,non-invasive technique for the treatment of anastomotic stricture after radical resection of rectal *** technique can be widely used in clinical settings.

关键词： Rectal cancer Magnetic compression technique Magnetosurgery Anastomotic stricture Magnetic surgery clinic Case report

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面向应用的新一代稀磁半导体研究进展

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物理学报 2024年第1期73卷 9-22页

作者：彭毅赵国强邓正靳常青中国科学院物理研究所北京100190 中国科学院大学物理学院北京100049

稀磁半导体具有能同时调控电荷与自旋的特性,是破解摩尔定律难题的候选材料之一.我们团队率先提出了稀磁半导体中自旋和电荷掺杂分离的机制,探索并研制了新一代稀磁半导体材料,为突破经典稀磁半导体材料的制备瓶颈提供了有效解决方案.以... 详细信息

稀磁半导体具有能同时调控电荷与自旋的特性,是破解摩尔定律难题的候选材料之一.我们团队率先提出了稀磁半导体中自旋和电荷掺杂分离的机制,探索并研制了新一代稀磁半导体材料,为突破经典稀磁半导体材料的制备瓶颈提供了有效解决方案.以(Ba,K)(Zn,Mn)_(2)As_(2)等为代表的新一代稀磁半导体,通过等价态的Mn掺杂引入自旋、异价态的非磁性离子掺杂引入电荷,成功实现了230 K的居里温度,刷新了可控型稀磁半导体的居里温度记录.本文将重点介绍几种代表性的新一代稀磁半导体的设计与研制、新一代稀磁半导体的综合物性表征、大尺寸单晶生长以及基于单晶的安德烈夫异质结研制.我们团队通过新一代稀磁半导体的新材料设计研制、综合物性研究、简单原型器件构建的“全链条”模式研究,开拓了自旋电荷分别掺杂的稀磁半导体材料研究领域,充分展现了自旋和电荷掺杂分离的新一代稀磁半导体材料潜在应用前景.

关键词：新一代稀磁半导体自旋电荷掺杂分离高居里温度多组合异质结

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“吐故方能纳新”——基于退市新规的事件研究

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中央财经大学学报 2024年第2期 81-91页

作者：郑登津兰天琪赵瑞瑞中央财经大学会计学院清华大学经济管理学院

党的十九届五中全会提出要“全面实行股票发行注册制,建立常态化退市机制”,退市制度是资本市场的基础法律制度,完善的退市制度是建立良性市场生态的重要一环。本文以2020年12月31日退市新规的正式发布为研究事件,通过事件研究方法对退... 详细信息

党的十九届五中全会提出要“全面实行股票发行注册制,建立常态化退市机制”,退市制度是资本市场的基础法律制度,完善的退市制度是建立良性市场生态的重要一环。本文以2020年12月31日退市新规的正式发布为研究事件,通过事件研究方法对退市新规发布后的短期市场反应进行检验。结果发现:市场对退市新规的审议通过体现了充分的关注并予以积极反应,依据公司特征进行区分后发现,经营风险和监管风险较高的公司市场反应较差,而信息环境较好、投资者保护水平较高的公司市场反应更加正向;进一步地,退市新规对于国企与非国企上市公司影响并无显著差异,投资者对创业板上市公司的市场反应相对负面;此外,较之征求意见稿,退市新规正式版发布的市场反应更为显著。结论显示,退市新规的正式颁布优化市场环境,高质量公司更加受益于资本市场改革红利,为资本市场的深化改革和促进上市公司高质量发展提供了重要启示。

关键词：退市新规经营风险监管风险信息披露投资者保护

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铝热剂应用研究进展

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火炸药学报 2024年第7期47卷 575-590,I0001页

作者：邓正亮王亚军刘瑞华甘强冯长根北京理工大学机电学院北京100081

为深入理解铝热剂的应用情况,首先回顾了其发展历程,以实际应用问题为导向,对铝热剂在微含能器件(如微点火器和微推进器)、含能药剂(如烟火药、推进剂及其添加剂、起爆药和炸药添加剂)、材料制备(包括材料制备与合成、材料焊接)及其他领... 详细信息

为深入理解铝热剂的应用情况,首先回顾了其发展历程,以实际应用问题为导向,对铝热剂在微含能器件(如微点火器和微推进器)、含能药剂(如烟火药、推进剂及其添加剂、起爆药和炸药添加剂)、材料制备(包括材料制备与合成、材料焊接)及其他领域(如安全装置、微生物灭杀、金属热切割和油井封堵)的应用研究进行了综述,并探讨了铝热剂应用中的安全性问题(包括感度和毒性问题);总结了当前铝热剂应用研究存在的不足,如性能优异的铝热剂种类较为单一、对新应用场景开拓不足、对铝热剂的安全性研究不够深入等问题。最后对铝热剂应用研究未来的研究方向和发展趋势进行了展望,认为未来应朝着开发新型铝热剂、拓展新的应用领域以及深入研究铝热剂应用安全性等方向发展。附参考文献124篇。

关键词：铝热剂铝热反应含能器件含能药剂微点火器件微推进器

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基于孔雀石绿/核酸适配体的免标记荧光法检测中药中的赭曲霉素A

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中国中药杂志 2024年第7期49卷 1818-1825页

作者：杨圆圆邓峥嵘高仕超郭丽敏山西中医药大学山西晋中030619

该文报道了一种基于孔雀石绿/核酸适配体的免标记荧光法检测中药中的赭曲霉素A(OTA)。孔雀石绿本身荧光信号微弱,与赭曲霉素A的核酸适配体作用后,G-四链体结构的核酸适配体为孔雀石绿提供一个保护的微环境,使其荧光信号显著增强。再加入... 详细信息

该文报道了一种基于孔雀石绿/核酸适配体的免标记荧光法检测中药中的赭曲霉素A(OTA)。孔雀石绿本身荧光信号微弱,与赭曲霉素A的核酸适配体作用后,G-四链体结构的核酸适配体为孔雀石绿提供一个保护的微环境,使其荧光信号显著增强。再加入OTA之后,核酸适配体会优先与OTA结合,从而使孔雀石绿游离于核酸适配体之外,其荧光信号随之减弱。基于此,该文以OTA的核酸适配体为识别元件,孔雀石绿为荧光探针,建立了一种基于核酸适配体的荧光法检测中药中的OTA。并对金属离子、核酸适配体和孔雀石绿的浓度等影响实验结果的主要因素进行了进一步的优化。在最佳实验条件下对OTA进行了检测,实验发现,随着OTA浓度的增大,荧光信号逐渐减弱,在20~1000 nmol·L^(-1),OTA浓度与荧光信号比值ΔF/F呈线性相关(ΔF=F_(0)-F,F_(0)为核酸适配体/孔雀石绿的荧光信号,F为OTA/核酸适配体/孔雀石绿的荧光信号),检出限为7.1 nmol·L^(-1),R^(2)=0.995。为考察该方法的特异性,该实验选择了3种与OTA结构相似的物质以及2种可能和OTA共存的真菌毒素进行交叉反应率实验和特异性实验。交叉反应率实验表明这些干扰物不会引起检测体系明显的荧光信号变化,而特异性实验显示了当干扰物与OTA混合后,混合物产生的荧光信号与OTA的荧光信号接近,说明即使与干扰物共存,OTA的检测也不会受到影响,说明方法具有良好的特异性;方法也展现了良好的重复性和稳定性。仅对中药进行简单的离心和稀释,方法即可用于中药葛根、苦参、香加皮中OTA的检测,回收率在91.50%~121.3%。该方法不需要复杂的中药预处理,操作简单,检测成本低,检测时间短,而且方法将核酸适配体应用于中药质量鉴定中,进一步拓展了核酸适配体的应用范围。

关键词：核酸适配体孔雀石绿赭曲霉素A 荧光免标记

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发电企业电力市场营销管理体制的相关思考

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上海节能 2024年第1期 8-14页

作者：曹安国邓征王涛申能股份有限公司

结合电力体制改革进度,对电力市场营销管理体制的概念进行了界定。梳理了当前国内主要发电企业电力市场营销管理体制的现状,并进行了不同企业管理体制的利弊分析。针对地方能源企业S的市场营销管理体制现状,提出了管理职责调整优化等建议。

关键词：电力市场营销管理体制改革发电企业

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