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Existence of long-range magnetic order in Heisenberg spin nanoribbons with edge modification

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Communications in Theoretical Physics 2024年第7期76卷 134-144页

作者： da-cheng ma Ling-yi Cui Chu-xiao Sun Xiao-dan Chi Zheng-Nan XianYu An Du College of Science Northeastern UniversityShenyang 110819China Department of Basic Science Dalian Naval AcademyDalian 116018China Department of Physics College of SciencesShenyang University of Chemical TechnologyShenyang 110142China National Frontiers Science Center for Industrial Intelligence and Systems Optimization Northeastern UniversityChina Key Laboratory of data Analytics and Optimization for Smart Industry(Northeastern University) Ministry of EducationChina

Long-range magnetic order appears on a side decorated Heisenberg spin nanoribbon at nonzero temperature,although no spontaneous magnetization exists in a one-or two-dimensional isotropic Heisenberg model at any nonzero temperature according to the Mermin-Wagner *** use of the spin Green's function method,we calculated the magnetizations of Heisenberg nanoribbons decorated by side spins with single-ion anisotropy and found that the system exhibits a nonzero transition temperature,whether the decorated edge spins of the system link together or separate from each *** the width of the nanoribbon achieves infinite limit,the transition temperatures of the system tend to the same finite constant eventually whether one edge or both edges are decorated by side spins in the *** results reveal that the magnetism of a low-dimensional spin system is different from that of a threedimensional spin *** the single-ion anisotropy of edge spins in a Heisenberg spin nanoribbon can be modulated by an electric field experimentally,various useful long-range magnetic orders of the system can be *** work can provide a detailed theoretical basis for designing and fabricating next-generation low-dimensional magnetic random-access memory.

关键词： Nanoribbon magnetic anisotropy long-range magnetic order Heisenberg model transition temperature

《民法典》视域下优化法治化营商环境的司法保障——基于L法院的实证考察

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河北法学 2024年第6期42卷 165-187页

作者：马大壮河北省廊坊市中级人民法院河北廊坊065000

一个地区的营商环境状况直接影响到市场主体投资信心和发展预期,决定着区域经济发展的动力、活力和后劲,而《民法典》是调整平等主体之间的人身关系和财产关系的基础性、综合性法律,是市场主体生产经营以及人民法院化解商事纠纷、优化... 详细信息

一个地区的营商环境状况直接影响到市场主体投资信心和发展预期,决定着区域经济发展的动力、活力和后劲,而《民法典》是调整平等主体之间的人身关系和财产关系的基础性、综合性法律,是市场主体生产经营以及人民法院化解商事纠纷、优化法治化营商环境所依据的最重要的法律规范。以L法院为例,针对与人民法院直接相关的司法效率、司法公正性、司法公开、诉讼便利度、办理破产等营商环境评估指标,实证调研数据表明,各级法院需要及时更新司法理念,优化解纷程序,紧扣司法质效,强化数字赋能,深化部门对接,不断提升司法保障法治化营商环境的能力和水平。

关键词：营商环境民法典法治化司法法院

Effectiveness and safety of early lens extraction during par plana vitrectomy for proliferative diabetes retinopathy with mild cataract:a randomized clinical trial

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International Journal of Ophthalmology(English edition) 2024年第3期17卷 528-536页

作者： Wei-Bo Feng Lei Zheng Ying-Qi Li Yong-Hao Li Guo-Ming Zhang Xian Wang Bing-Qian Liu Ling Jin Yi-Nuo Huang Yang-Fan Yang Zi-Dong Chen da-Hui ma Qing-Shan Chen Chao-Jun Qin Bing-Min Feng Zhu-Min Yang Xing Huang Cheng-Jie Yang Sheng-Hui Liu Ming-Xing Wu State Key Laboratory of Ophthalmology Guangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangdong Provincial Clinical Research Center for Ocular DiseasesZhongshan Ophthalmic CenterSun Yat-sen UniversityGuangzhou 510275Guangdong ProvinceChina Shenzhen Eye Hospital Affiliated to Jinan University Shenzhen 518040Guangdong ProvinceChina The Affiliated Hospital of Guizhou Medical University Guiyang 550004Guizhou ProvinceChina Guangzhou Aier Eye Hospital Guangzhou 510000Guangdong ProvinceChina

●AIM:To evaluate the effectiveness and safety of early lens extraction during pars plana vitrectomy(PPV)for proliferative diabetic retinopathy(PDR)compared to those of PPV with subsequent cataract surgery.●METHODS:This multicenter randomized controlled trial was conducted in three Chinese hospitals on patients with PDR,aged>45y,with mild *** participants were randomly assigned to the combined(PPV combined with simultaneously cataract surgery,i.e.,phacovitrectomy)or subsequent(PPV with subsequent cataract surgery 6mo later)group and followed up for *** primary outcome was the change in best-corrected visual acuity(BCVA)from baseline to 6mo,and the secondary outcomes included complication rates and medical expenses.●RESULTS:In total,129 patients with PDR were recruited and equally randomized(66 and 63 in the combined and subsequent groups respectively).The change in BCVA in the combined group[mean,36.90 letters;95%confidence interval(CI),30.35–43.45]was significantly better(adjusted difference,16.43;95%CI,8.77–24.08;Pma(17.65%vs 3.77%,P=0.005).No significant differences were found in the photocoagulation spots,surgical time,and economic expenses between two *** the subsequent group,the duration of work incapacity(22.54±9.11d)was significantly longer(P<0.001)than that of the combined group(12.44±6.48d).●CONCLUSION:PDR patients aged over 45y with mild cataract can also benefit from early lens extraction during PPV with gratifying effectiveness,safety and convenience,compared to sequential surgeries.

关键词： lens extraction pars plana vitrectomy proliferative diabetic retinopathy cataract simultaneously operations

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预应力钢绞线感应加热及其丝间接触模拟研究

热加工工艺 2024年第2期53卷 51-56页

作者：张强马达贾海朋张玉川河北工业大学人工智能与数据科学学院天津300131 河北工业大学机械工程学院天津300131 天津博跃电气科技有限公司天津300403

预应力钢绞线感应加热是一复杂工艺过程,利用多物理场仿真软件对该过程进行模拟,可为工艺优化提供基础。对于几何方面,由于工艺的连续性,难以确定钢绞线丝间接触情况;对于物理场方面,感应加热是涉及多场的强耦合、强非线性过程。针对以... 详细信息

预应力钢绞线感应加热是一复杂工艺过程,利用多物理场仿真软件对该过程进行模拟,可为工艺优化提供基础。对于几何方面,由于工艺的连续性,难以确定钢绞线丝间接触情况;对于物理场方面,感应加热是涉及多场的强耦合、强非线性过程。针对以上情况,根据两种丝间接触情况建立了三维钢绞线几何模型,描述了非线性材料参数,建立了相对磁导率关于温度和磁通密度的数值模型,测定了现场温度数据,判断了边丝间是否接触,分析了接触面宽度对加热效果的影响。结果表明:边丝之间是接触的,且现场温度数据与模拟结果较为吻合,验证了模拟的正确性。

关键词：感应加热有限元分析中频电磁场预应力钢绞线温度场

不同剂量甲苯磺酸瑞马唑仑全麻诱导对老年患者镇静深度的影响

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中外医学研究 2024年第5期22卷 108-112页

作者：马达何运平广州医科大学附属第一医院广东广州510000

目的:探讨不同剂量甲苯磺酸瑞马唑仑全麻诱导对老年患者镇静深度的影响。方法:选取2020年1月—2021年12月广州医科大学附属第一医院收治110例采用甲苯磺酸瑞马唑仑全麻诱导的老年患者,按照随机数表法分成观察组与对照组,各55例。观察组... 详细信息

目的:探讨不同剂量甲苯磺酸瑞马唑仑全麻诱导对老年患者镇静深度的影响。方法:选取2020年1月—2021年12月广州医科大学附属第一医院收治110例采用甲苯磺酸瑞马唑仑全麻诱导的老年患者,按照随机数表法分成观察组与对照组,各55例。观察组甲苯磺酸瑞马唑仑诱导剂量为0.3 mg/kg,对照组甲苯磺酸瑞马唑仑诱导剂量为0.2 mg/kg。比较两组达到深度麻醉时间、生命体征、不良反应、药物补救情况。结果:观察组达到深度麻醉时间明显短于对照组,差异有统计学意义(PmaP)比较,差异无统计学意义(P>0.05)。两组不良反应总发生率比较,差异无统计学意义(P>0.05)。观察组药物补救发生率低于对照组,差异有统计学意义(P<0.05)。结论:高剂量甲苯磺酸瑞马唑仑全麻诱导应用于老年患者后起效速度更快,不会对患者生命体征造成严重影响,且药物补救概率低。

关键词：不同剂量甲苯磺酸瑞马唑仑全麻诱导镇静深度

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地佐辛对全身麻醉后导尿管相关性膀胱刺激征的预防作用

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中国卫生标准管理 2024年第6期15卷 137-141页

作者：马达邓智光广州医科大学附属第一医院海印院区麻醉科广东广州510200

目的探讨地佐辛对全身麻醉后导尿管相关性膀胱刺激征(catheter-related bladder discomfort,CRBD)的预防作用。方法选取广州医科大学附属第一医院海印院区2022年4月—2023年3月收治的60例经皮肾镜取石术全麻手术患者,根据术前是否注射... 详细信息

目的探讨地佐辛对全身麻醉后导尿管相关性膀胱刺激征(catheter-related bladder discomfort,CRBD)的预防作用。方法选取广州医科大学附属第一医院海印院区2022年4月—2023年3月收治的60例经皮肾镜取石术全麻手术患者,根据术前是否注射地佐辛分为观察组与对照组。对照组手术结束前20 min静脉注射2 mL生理盐水;观察组手术结束前20 min静脉注射地佐辛0.1 mg/kg。比较2组疼痛程度[视觉模拟评分法(visual analogue scale,VAS)]、CRBD发生情况、术中舒芬太尼使用剂量、拔出气管导管后镇静程度、平均动脉压(mean arterial pressure,maP)、心率(heart rate,HR)。结果观察组拔管后、拔管后15 min、30 min、1 h、2 h、4 h的VAS评分低于对照组(PmaP、HR低于对照组(P<0.05)。结论地佐辛对全身麻醉术后CRBD具有明显预防作用,可缓解疼痛,保持生命体征平稳,可以提高镇静效果,减少舒芬太尼使用剂量,应用价值高。

关键词：地佐辛全身麻醉导尿管相关性膀胱刺激征预防作用镇静程度平均动脉压心率

Impacts of the COVID-19 pandemic on the energy sector

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2021年第12期22卷 941-956页

作者： Hong-fang LU Xin ma Min-da ma China-Pakistan Belt and Road Joint Laboratory on Smart Disaster Prevention of major Infrastructures Southeast UniversityNanjing 210096China School of Civil Engineering Southeast UniversityNanjing 211189China School of Science Southwest University of Science and TechnologyMianyang 621010China Department of Earth System Science Tsinghua UniversityBeijing 100084China

The outbreak of coronavirus disease 2019(COVID-19)has had a considerable impact on every industrial *** a pillar of economic development,the energy sector is experiencing difficult times during the global *** paper reviews the impact of the pandemic on the global energy sector in terms of demand,price,employment,government policy,countermeasures,and academic research,and focuses on the two largest energy countries in the world:China and the United *** the virus has dramatically impacted the energy sector,action to address climate issues has not been suspended,but has become more urgent than *** have pointed out that it is time to promote the transition to clean energy ***,here we discuss progress towards clean energy transition,including bioenergy,mineral resources for clean energy techniques,batteries,and *** results indicate that supply chain stability,energy storage,and policymaking during the epidemic period and post-epidemic period are significant challenges for the transition to clean ***,the transition can also bring new opportunities for employment,economic recovery,and the human living environment.

关键词： Coronavirus disease 2019(COVID-19) Energy sector Energy policy Clean energy transition Bioenergy Battery Electrolyzer

Deposition of Ti-Si-N coatings in deep blind-hole with pulsed dc power

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中国有色金属学会会刊：英文版 2004年第z1期14卷 260-263页

作者： ma da-yan ma Sheng-li XU Ke-wei State Key Laboratory for Mechanical Behavior of materials Xi''an Jiaotong University Xi''an 710049 China State Key Laboratory for Mechanical Behavior of MaterialsXi''an Jiaotong University Xi''an 710049 China State Key Laboratory for Mechanical Behavior of MaterialsXi''an Jiaotong University Xi''an 710049 China

Multiphase nanocomposite Ti-Si-N coatings deposited by pulsed dc plasma enhanced chemical vapor deposition technique on the surface of HSS substrate, which were bolted with deep blind-hole to simulate the complexshaped surface of various tools, were investigated. The micrographs show that the surface morphologies of the coatings become coarser with an increasing depth of the bottom holes. And the silicon content increases in Ti-Si-N coatings, which are composed of nanocrystalline TiN, nano-sized amorphous Si3N4, and occasionally amorphous or nanocrysralline TiSi2. The thickness of the coatings decreases with the increasing depth of holes, which may result from the changes of the composition in the coatings. The microhardness of the coatings increases firstly with the increasing depth of holes, reaches a maximum value of about HV5 700 at 10mm depth, and then decreases at larger depth.

关键词： nanocomposite pulsed dc PCVD Ti-Si-N deep blind-hole

Ultra-stable and multistimuli-responsive nanoparticles coated with zwitterionic pillar[n]arene for enhanced cellular uptake

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Chinese Chemical Letters 2021年第3期32卷 1025-1028页

作者： Yupeng Jiao Shang Lan da ma Department of Chemistry Fudan UniversityShanghai 200433China

Nanoparticle surface property is crucial for circulation stability,cellullar uptake and other biological *** rionic pillar[n]arenes(ZPns)we re used to coat gold nanopa rticles(GNPs)via hostguest *** resulting GNPs demonstrated higher stability in blood serum compared to polyethylene glycol(PEG)-coated ***-coated GNPs were responsive to UV-irradiation,competitive displacement and acidic ***-irradiation or competitive displacement could lead to the removal of ZPn coating to expose GNPs,which enhanced cell uptake efficiency by 5.9-and 7.4-fold,respectively.

关键词： Host-guest systems Stimuli responsiveness Zwitterionic ligands Gold nanoparticles Cellular uptake