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超声-紫外(US-UVC)联用绿色科学养护当归

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辽宁大学学报（自然科学版） 2024年第2期51卷 103-112页

作者：李芳蓉杨咏艺牛娟张建军赵云峰韩秀凤甘肃中医药大学药学教学部甘肃定西743000 甘肃农业大学动物医学院甘肃兰州730070

目的采用超声净洗和短波紫外(UVC)消毒技术联用绿色科学养护中药材当归,通过定期观测,分时段取样测定各中国药典指标,同时UVC消毒再养护,根据结果评价养护效果并分析优化确定超声-紫外(US-UVC)联用养护当归药材的最佳条件.方法以纯净水... 详细信息

目的采用超声净洗和短波紫外(UVC)消毒技术联用绿色科学养护中药材当归,通过定期观测,分时段取样测定各中国药典指标,同时UVC消毒再养护,根据结果评价养护效果并分析优化确定超声-紫外(US-UVC)联用养护当归药材的最佳条件.方法以纯净水清洗当归(CG-W)和超声净洗当归(CG-US)作为对照组,将当归超声净洗后干燥直至足干,再利用UVC照射消毒至设定的时间,通过定期肉眼观测和分时段测定各种药典指标及其变化,综合评价养护效果.结果CG-W对照组当归18月后仍无霉变但有极其轻微的虫蛀,到24月时出现了略微的霉变,似有轻微色变和隐约渗油,历时27月时出现可见且明显的虫蛀;对照组CG-US当归21月末出现轻微虫蛀,24月时虫蛀仍然较轻,且无明显霉变和色变;US-UVC联用养护组中US-UVC-0.5h组在27月末出现了轻微药材粉末,且在27~30月间仅有部分药材出现虫蛀,且一直没有霉变和色变,颜色无明显变化,而US-UV-1.0h组的当归在贮藏至30月末时出现了极轻虫蛀迹象.US-UV-2.0h、US-UV-3.0h和US-UV-4.0h各组当归在养护后贮藏期间的30月内始终保持表观完好无损的状态,既无虫蛀也无霉变、色变现象发生.对照组及试验各组各时段所测定的各种主要药典指标均符合要求,且由测定结果的相对标准偏差(RSD)值及其范围足以说明测定方法的重复性和稳定性良好.结论考虑成本和养护时效,以US-UVC-2.0h养护为最佳养护配比组合进行养护,养护后当归药材完好贮藏期超过30月,US-UVC联用养护中药材当归具有经济高效、操作简便、省时节能、安全环保等特点,可以推广应用.

关键词：当归超声-紫外联用超声净洗技术 UVC消毒技术绿色科学养护

Effects of Terpinen-4-ol on Four Metabolic Enzymes and Polyphenol Oxidase (PPO) in Mythimna separta Walker

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Agricultural Sciences in China 2008年第6期7卷 726-730页

作者： MA Zhi-qing han xiu-ling feng Jun-tao LI Guang-ze ZhanG Xing Shaanxi Research Center of Biopesticide Technology and Engineering/Biorational Pesticide Research ＆ Development Center Northwest A ＆ F University Yangling 712100 P.R.China

To study insecticidal mechanism of terpinen-4-ol, a main insecticidal composition in the essential oil of Sabina vulgaris, the 5th instar larvae of Mythimna separta, were investigated with terpinen-4-ol by topical application. The activities of phosphatase, glutathione S-transferase （GSTs）, cytochrome P450 （P450）, and polyphenol oxidase （PPO） of tested insects were determined in all poisoning stages, including exciting stage, convulsing stage, paralysis stage, and recover stage. The result showed that the activities of both acid phosphatase （ACP） and alkaline phosphatase （AKP） in treated insects were induced by terpinen-4-ol, but ACP was inhibited in paralysis stage. The activities of GSTs were inhibited in exciting stage, convulsing stage, and paralysis stage, but gradually recovered in recover stage. O-demethylase activity of cytochrome P450 was inhibited by terpinen-4-ol, and the inhibition rate in all poisoning stages were 26.27, 46.03, 80.24, and 90.22%, respectively. PPO activities were strongly inhibited by terpinen-4-ol both in vitro and in vivo. In conclusion, the activities of P450, GSTs, and PPO could have relation with toxicity of terpinen-4-ol against larvae of the Mythimna separta, but recover stage of the poisoning insects might be related to GSTs induced. As a new insecticide or synergist, terpinen- 4-ol has a potential value in field of insecticide resistance management.

关键词： terpinen-4-ol Mythimna separate polyphenol oxidase (PPO) metabolic enzymes insecticidal mechanism

Structural and Magnetic Properties of Tb(Fe_(1-x)Ni_(x))_(11.3)Nb_(0.7) Compounds

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Chinese Physics Letters 1998年第12期15卷 922-924页

作者： WANG Jian-li YANG Fu-ming BAO Fu-quan TANG Ning han xiu-feng YANG Dong ZhanG Cheng F.Rde Boer State Key Laboratory of Magnetism Institute of PhysicsChinese Academy of SciencesBeijing 100080 Van der Waals-Zeeman Institute University of AmsterdamValckenierstraat 651018 XE AmsterdamThe Netherlands

Structural and magnetic properties of Tb(Fe_(1-x)Ni_(x))_(11.3)Nb_(0.7) compounds have been *** x-ray diffraction patterns show that all compounds crystallize in the ThMn12-type structure and that all samples are almost of single *** lattice constants monotonously decrease with increasing Ni *** Curie temperature Tc clearly increases and the saturation moment Ms monotonously decreases with increasing Ni content.X-ray diffraction patterns of aligned samples at room temperature show that for x≤0.2 the easy magnetization direction is in the plane while for the x=0.25 compound the easy magnetization direction is along the *** the compounds with x≤0.20 spin reorientation occurs above room temperature whereas in the compounds with x>0.2 there is a spin reorientation below room *** has been found that Ni contributes positively to the T-sublattice moment MT.

关键词： temperature. compounds magnetization

An Explicit Iteration Algorithm for Structural Reliability and its Realization by MATLAB

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International Journal of Plant Engineering and Management 2008年第4期13卷 220-224页

作者： YANG Jian-ming ZhanG han-ye feng xiu-juan College of Mechanical Engineering Inner Mongolia University of Science and Technology Baotou 014010 P.R. China

Based on the improved first order second moment method of the structural reliability, an explicit iteration algorithm is proposed, which can avoid solving structural performance function to obtain reliability index β and have simple calculation forms. Finally, the validity of the explicit iteration algorithm is illustrated through two examples by MATLAB programming.

关键词： reliability first order second moment limited state function explicit iteration MATLAB

一种数据非易失性、多功能和可编程的自旋逻辑研究进展

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物理学报 2018年第12期67卷 152-159页

作者：韩秀峰万蔡华中国科学院物理研究所北京凝聚态物理国家研究中心北京100190 中国科学院大学物理科学学院北京100049

自旋(磁)逻辑器件具有数据非易失性、CMOS电路兼容性、操作速度快等优点,是开发计算存储相融合的非冯·诺依曼计算机架构的理想候选方案之一.本文进一步演示基于自旋霍尔效应的自旋逻辑方案.利用自旋霍尔效应不仅能够实现基本的布尔逻... 详细信息

自旋(磁)逻辑器件具有数据非易失性、CMOS电路兼容性、操作速度快等优点,是开发计算存储相融合的非冯·诺依曼计算机架构的理想候选方案之一.本文进一步演示基于自旋霍尔效应的自旋逻辑方案.利用自旋霍尔效应不仅能够实现基本的布尔逻辑功能和数据存储功能,还可以利用自旋轨道力矩磁矩翻转的对称性要求、偏置磁场要求等,进一步实现自旋逻辑器件的可编程和多功能特性.利用这些特点,同一自旋霍尔逻辑器件可以实现"与"、"或"、"非"、"与非"、"或非"等功能.因为这些特性,基于自旋霍尔效应的自旋逻辑单元有望成为后续自旋逻辑器件和电路的核心器件,推动后者的持续开发与广泛应用.

关键词：自旋逻辑自旋霍尔效应可编程逻辑数据非易失性

Unstructured Road Extraction in UAV Images based on Lightweight Model

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Chinese Journal of Mechanical Engineering 2024年第2期37卷 372-384页

作者： Di Zhang Qichao An Xiaoxue feng Ronghua Liu Jun han feng Pan School of Automation Beijing Institute of TechnologyBeijing 100081China Tianjin Institute of Maritime Navigation Instruments Tianjin 300130China The 716th Research Institute of China Shipbuilding Group Co. LtdJiangsu 222061China

There is no unified planning standard for unstructured roads,and the morphological structures of these roads are complex and *** is important to maintain a balance between accuracy and speed for unstructured road extraction *** road extraction algorithms based on deep learning have problems such as high model complexity,high computational cost,and the inability to adapt to current edge computing ***,it is best to use lightweight network *** the need for lightweight models and the characteristics of unstructured roads with different pattern shapes,such as blocks and strips,a TMB(Triple Multi-Block)feature extraction module is proposed,and the overall structure of the TMBNet network is *** TMB module was compared with SS-nbt,Non-bottleneck-1D,and other modules via *** feasibility and effectiveness of the TMB module design were proven through experiments and *** comparison experiment,using multiple convolution kernel categories,proved that the TMB module can improve the segmentation accuracy of the *** comparison with different semantic segmentation networks demonstrates that the TMBNet network has advantages in terms of unstructured road extraction.

关键词： Unstructured road Lightweight model Triple Multi-Block(TMB) Semantic segmentation net

Mechanistic insights into stepwise activation of malachite for enhancing surface reactivity and flotation performance

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International Journal of Minerals,Metallurgy and Materials 2024年第10期31卷 2159-2172页

作者： Qicheng feng Wanming Lu han Wang Qian Zhang State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Faculty of Land Resource EngineeringKunming University of Science and TechnologyKunming 650093China Yunnan Key Laboratory of Green Separation and Enrichment of Strategic Mineral Resources Kunming University of Science and TechnologyKunming 650093China

Malachite is a common copper oxide mineral that is often enriched using the sulfidization-xanthate flotation ***,the direct sulfidization method cannot yield copper concentrate ***,a new sulfidization flotation process was developed to promote the efficient recovery of *** this study,Cu^(2+) was used as an activator to interact with the sample surface and increase its reaction sites,thereby strengthening the mineral sulfidization process and *** to single copper ion activation,the flota-tion effect of malachite significantly increased after stepwise Cu^(2+) *** potential,X-ray photoelectron spectroscopy(XPS),time-of-flight secondary ion mass spectroscopy(ToF-SIMS),scanning electron microscopy and energy dispersive spectrometry(SEM-EDS),and atomic force microscopy(AFM)analysis results indicated that the adsorption of S species was significantly enhanced on the mineral surface due to the increase in active Cu sites after Cu^(2+) stepwise ***,the proportion of active Cu-S spe-cies also increased,further improving the reaction between the sample surface and subsequent ***-transform infrared spec-troscopy(FT-IR)and contact angle tests implied that the xanthate species were easily and stably adsorbed onto the mineral surface after Cu^(2+) stepwise activation,thereby improving the hydrophobicity of the mineral ***,the copper sites on the malachite sur-face after Cu^(2+) stepwise activation promote the reactivity of the mineral surface and enhance sulfidization flotation of malachite.

关键词： malachite copper ions stepwise activation flotation mechanism enhanced sulfidization

In situ tracking of the lithiation and sodiation process of disodium terephthalate as anodes for rechargeable batteries by Raman spectroscopy

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Nano Research 2024年第1期17卷 245-252页

作者： xiu-Mei Lin Chong han Xin-Tao Yang Jia-Sheng Lin Wei-Qiang Yang Hong-Xu Guo Yao-Hui Wang Jin-Chao Dong Jian-feng Li Department of Chemistry and Environment Science Fujian Province University Key Laboratory of Analytical ScienceMinnan Normal UniversityZhangzhou 363000China College of Energy College of Chemistry and Chemical EngineeringCollege of MaterialsState Key Laboratory of Physical Chemistry of Solid SurfacesiChEMXiamen UniversityXiamen 361005China Institute of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018China

Organic compounds represent an appealing group of electrode materials for rechargeable batteries due to their merits of biomass,sustainability,environmental friendliness,and *** terephthalate(Na_(2)C_(8)H_(4)O_(4),Na_(2)TP),an organic salt with a theoretical capacity of 255 mAh·g^(-1),is electroactive towards both lithium and ***,its electrochemical energy storage(EES)process has not been directly observed via in situ characterization techniques and the underlying mechanisms are still under ***,in situ Raman spectroscopy was employed to track the de/lithiation and de/sodiation processes of *** appearance and then disappearance of the–COOLi Raman band at 1625 cm^(-1) during the de/lithiation,and the increase and then decrease of the–COONa Raman band at 1615 cm^(-1) during the de/sodiation processes of Na2TP elucidate the one-step with the 2Li+or 2Na+transfer *** also found that the inferior cycling stability of Na2TP as an anode for sodium-ion batteries(SIBs)than lithium-ion batteries(LIBs)could be due to the larger ion radium of Na+than Li+,which results in larger steric resistance and polarization during *** Na2TP,therefore,shows greater changes in spectra during de/sodiation than de/*** expect that our findings could provide a reference for the rational design of organic compounds for EES.

关键词： disodium terephthalate(Na_(2)C_(8)H_(4)O_(4) Na2TP) in situ Raman spectroscopy de/lithiation de/sodiation mechanisms

An optimized time-adaptive aerothermal coupling calculation method for aerothermal analysis of disc cavity system

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Chinese Journal of Aeronautics 2024年第9期37卷 164-177页

作者： Shuai BI Junkui MAO Lei WANG feng han College of Energy and Power Engineering Nanjing University of Aeronautics and AstronauticsNanjing 20016China AECC Aeroengine Control System Institute Wuxi 214063China Integrated Energy Institute Nanjing University of Aeronautics and AstronauticsNanjing 210016China

In order to further achieve the balance between the calculation accuracy and efficiency of the transient analysis of the aero-engine disc cavity system,an Optimized Time-adaptive Aerother-mal Coupling calculation(OTAC)method has been *** combines one-dimensional tran-sient calculation of air system,Conventional Sequence Staggered(CSS)method,Time-adaptive Aerothermal Coupling calculation(TAC)method and differential evolution optimization algorithm to obtain an efficient and high-precision aerothermal coupling calculation method of air *** both the heat conduction in the solid domain and the flow in the fluid domain as unsteady states in the OTAC,the interaction of fluid-solid information within a single coupling time step size was implemented based on the CSS ***,the coupling time step size was automatically adjusted with the number of iterations by using the Proportional-Integral-Deri vative(PID)*** show that when compared with the traditional loosely coupling method with a fixed time step size,the computational accuracy and efficiency of the OTAC method are improved by 8.9%and 30%,*** with the tight coupling calculation,the OTAC method can achieve a speedup of 1 to 2 orders of magnitude,while the calculation error is maintained within 6.1%.

关键词： Air system 1D-3D coupling Conjugate heat transfer Transient calculation Adaptive time step size