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Formation and Destiny of White Dwarf and Be Star Binaries

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Research in Astronomy and Astrophysics 2023年第2期23卷 262-274页

作者： Chun-Hua Zhu Guo-liang lü Xi-Zhen lu Jie He School of Physical Science and Technology Xinjiang UniversityUrumqi 830046China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China

The binary systems consisting of a Be star and a white dwarf(Be WDs) are very *** can originate from the binaries composed of a Be star and a subdwarf O or B star(Besd OBs),and they can merge into red giants via luminous red nova or can evolve into double WD potentially detected by the lISA *** the method of population synthesis,we investigate the formation and the destiny of Be WDs,and discuss the effects of the metallicity(Z) and the common envelope evolution *** find that Besd OBs are significant progenitors of Be *** 30%(Z = 0.0001)-50%(Z = 0.02) of Be WDs come from Besd *** 60%(Z = 0.0001)-70%(Z = 0.02) of Be WDs turn into red giants via a merger between a WD and a non-degenerated *** 30%(Z = 0.0001)-40%(Z = 0.02) of Be WDs evolve into double WDs which are potential gravitational waves of the lISA mission at a frequency band between about 3 × 10^(-3)and 3 × 10^(-2)*** common envelope evolution parameter introduces an uncertainty with a factor of about 1.3 on Be WD populations in our simulations.

关键词： (stars:)binaries(including multiple) close-stars evolution-stars rotation-(stars:)white dwarfs

广州市校场北路西汉墓出土青铜器制作工艺分析

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铸造 2023年第8期72卷 991-997页

作者：吕良波广州市文物考古研究院南汉二陵博物馆海上丝绸之路(广州)文化遗产保护管理研究中心广东广州510006

通过对广州市校场北路省物资局西汉墓出土鼎、壶、温酒樽、盒、釜、杵臼、盆、灯等典型器类青铜器铸造痕迹进行观察,对其制作工艺进行分析。结果表明,该批青铜器广泛采用二分范和分铸的方法进行铸造,二分范铸造的方法在汉代各地是比较... 详细信息

通过对广州市校场北路省物资局西汉墓出土鼎、壶、温酒樽、盒、釜、杵臼、盆、灯等典型器类青铜器铸造痕迹进行观察,对其制作工艺进行分析。结果表明,该批青铜器广泛采用二分范和分铸的方法进行铸造,二分范铸造的方法在汉代各地是比较普遍的。而附件的分铸既可以保证二分范脱模的成功率,同时也让青铜铸造过程分工更加精细,极大提高青铜器铸造的生产效率。

关键词：西汉墓青铜器二分范分铸

Synthesis of chitosan-based grafting magnetic flocculants for flocculation of kaolin suspensions

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Journal of Environmental Sciences 2024年第5期139卷 193-205页

作者： Chuang liu Xiaoyu Wang Sicong Du Wenyan liang Beijing Key lab for Source Control Technology of Water Pollution/Engineering Research Center for Water Pollution Source Control&Eco-remediation/College of Environmental Science and Engineering Beijing Forestry UniversityBeijing 100083China

A series of novel chitosan-based magnetic flocculants FS@CTS-P(AM-DMC)was prepared by molecular structure *** characterization results showed that FS@CTS-P(AM-DMC)had a uniform size of about 21.46 nm,featuring a typical core-shell structure,and the average coating layer thickness of CTS-P(AM-DMC)was about 5.03 ***@CTS-P(AM-DMC)exhibited excellent flocculation performance for kaolin suspension,achieved 92.54% turbidity removal efficiency under dosage of 150 mg/l,pH 7.0,even at high turbidity(2000 NTU)with a removal efficiency of 96.96%.The flocculation mechanism was revealed to be dominated by charge neutralization under acidic and neutral conditions,while adsorption and bridging effects play an important role in alkaline *** properties of magnetic aggregates during flocculation,breakage,and regeneration were studied at different pH levels and *** the process of magnetophoretic,magnetic particles collide and adsorb with kaolin particles continuously due to magnetic and electrostatic attraction,transform into magnetic chain clusters,and then further form three-dimensional network magnetic aggregates that can capture free kaolin particles and other chain *** image velocimetry confirmed the formation of eddy current of magnetic flocs and experienced three stages:acceleration,stabilization,and deceleration.

关键词： Magnetic flocculation Chitosan Fe_(3)O_(4) Graft copolymerization PIV

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线性测微电感的精化

光学精密工程 2015年第1期23卷 191-196页

作者：石照耀刘吕亮北京工业大学机械工程与应用电子技术学院

为提高测微电感传感器的测量精度,提出了基于赫姆霍兹线圈理论设计螺线管线圈的方法,改善了螺线管线圈内轴向上磁场的分布均匀性。首先,分析了螺线管线圈模型,建立了螺线管线圈参数与轴向磁场强度分布相互关系的广义函数模型。然后,通... 详细信息

为提高测微电感传感器的测量精度,提出了基于赫姆霍兹线圈理论设计螺线管线圈的方法,改善了螺线管线圈内轴向上磁场的分布均匀性。首先,分析了螺线管线圈模型,建立了螺线管线圈参数与轴向磁场强度分布相互关系的广义函数模型。然后,通过线圈与磁芯的尺寸确定了系统轴向磁场强度分布函数模型,结合磁芯移动区间范围设置磁场均匀度最小误差目标函数,通过对目标函数寻优得到各螺线管线圈的各项参数。最后,搭建了测微电感传感器的测试系统,测试了传感器性能。实验结果表明:与传统线圈相比,改进型螺线管线圈在100μm测量范围内的线性度由0.46%提高到0.30%。实验显示通过对不同规格的螺线管线圈进行组合,可使得螺线管内轴向上磁场强度分布均匀,从而提高了测量精度。

关键词：测微电感电感传感器微位移测量螺旋管线圈接触扫描测头

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基于统计学的老电影斑点自适应检测方法

天津大学学报（自然科学与工程技术版） 2014年第5期47卷 427-432页

作者：何凯吕亮孟春芝天津大学电子信息工程学院天津300072

传统基于ROD的斑点检测算法在对不同帧或当前帧的不同区域进行检测时,所采取的阈值是固定不变的,缺乏自适应性,同时也在很大程度上影响了检测效果.为了解决上述问题,提出了一种基于统计学的自适应阈值检测方法.传统检测方法仅计算各孤... 详细信息

传统基于ROD的斑点检测算法在对不同帧或当前帧的不同区域进行检测时,所采取的阈值是固定不变的,缺乏自适应性,同时也在很大程度上影响了检测效果.为了解决上述问题,提出了一种基于统计学的自适应阈值检测方法.传统检测方法仅计算各孤立点之间的灰度级差异,而该算法则是计算各点邻域块内的灰度级差异,同时利用阈值迭代及帧间的统计特性的方法来确定每一帧图像的最优阈值,提高了算法的自适应性.仿真实验结果表明,该算法的斑点检测效果比传统方法更加准确,自适应性也更高.

关键词：老电影修复斑点检测局部标准差自适应阈值

Intermittent fasting boosts antitumor immunity by restricting CD11b^(+)ly6C^(low)ly6G^(low) cell viability through glucose metabolism in murine breast tumor model

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Food Science and Human Wellness 2024年第4期13卷 2327-2345页

作者： Chenghao Fu Zhehao liang Zemiao Niu Ning Chen Yuemin li Zhenhua liang Yanwei Huo Hao Xi Rong Wang Yonghuan Yan Xiaoruo Gan Mengtian Wang Yun Huang Yan Zhang Mingming Gao Pin lü Postdoctoral Station for Basic Medicine Cardiovascular Medical Science CenterDepartment of Cell BiologyKey Laboratory of Neural and Vascular Biology of Ministry of EducationHebei Medical UniversityShijiazhuang 050017China Hebei Key laboratory of Forensic Medicine College of Forensic MedicineHebei Medical UniversityShijiazhuang 050017China Hebei Food Safety Key laboratory Hebei Food Inspection and Research InstituteShijiazhuang 050091China laboratory of lipid Metabolism Department of Biochemistry and Molecular BiologyKey Laboratory of Medical Biotechnology of Hebei ProvinceShijiazhuang 050017China

Intermittent fasting can benefit breast cancer patients undergoing chemotherapy or ***,it is still uncertain how to select immunotherapy drugs to combine with intermittent *** we observed that two cycles of fasting treatment significantly inhibited breast tumor growth and lung tissue metastasis,as well as prolonged overall survival in mice bearing 4T1 and 4T07 breast *** this process,both the immunosuppressive monocytic-(M-)and granulocytic-(G-)myeloid-derived suppressor cell(MDSC)decreased,accompanied by an increase in interleukin(Il)7R^(+)and granzyme B^(+)T cells in the tumor ***,we observed that ly6G^(low)G-MDSC sharply decreased after fasting treatment,and the cell surface markers and protein mass spectrometry data showed potential therapeutic *** investigation revealed that glucose metabolism restriction suppressed the splenic granulocytemonocyte progenitor and the generation of colony-stimulating factors and Il-6,which both contributed to the accumulation of *** the other hand,glucose metabolism restriction can directly induce the apoptosis of ly6G^(low)G-MDSC,but not ly6G^(high)*** summary,these results suggest that glucose metabolism restriction induced by fasting treatment attenuates the immune-suppressive milieu and enhances the activation of CD3^(+)T cells,providing potential solutions for enhancing immune-based cancer interventions.

关键词： Intermittent fasting ly6G^(low)myeloid-derived suppressor cell apoptosis Extramedullary hematopoiesis Colony stimulating factor Glucose metabolism restriction

Synthesis of morphology-controlled silver nanostructures by electrodeposition

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Nano-Micro letters 2010年第1期2卷 6-10页

作者： C.l.liang K.Zhong M.liu l.Jiang S.K.liu D.D.Xing H.Y.li Y.Na W.X.Zhao Y.X.Tong P.liu Instrumental Analysis & Research Center Sun Yat-sen University School of Chemistry and Chemical Engineering Sun Yat-sen University

Nanostructured silver was obtained by potentiostatic *** effects of ionized surfactant(sodium dodecanesulphonate)and the substrate(Cu and Ti)on the morphology of depositions were *** is found that morphologies of silver nanostructures can be simply controlled via change of the *** Ag nanoparticles with narrow size distribution were obtained by electrodeposition in Ag NO3-SDS aqueous solution on copper *** the case of titanium substrate,silver dendrite structures were *** of different morphologies,XRD and TEM results showed that the as-prepared samples belong to face-centered cubic silver structure with good *** formation mechanism of different silver nanostructures was discussed.

关键词： Electrodeposition Silver nanopartilces Silver nano dentrites

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基于低温辐射计的光探测器响应度基准

计量学报 2012年第6期33卷 494-498页

作者：林延东吕亮中国计量科学研究院北京100013

基于低温辐射计建立了一系列激光波长上光探测器响应度测量基准。进行了基准装置性能的研究，应用光辐射有效加热功率检验方法进行了不确定度评估。在氦氖、氩氪离子以及钛蓝宝石激光器的10个波长上测量了作为标准探测器的陷阱探测器的... 详细信息

基于低温辐射计建立了一系列激光波长上光探测器响应度测量基准。进行了基准装置性能的研究，应用光辐射有效加热功率检验方法进行了不确定度评估。在氦氖、氩氪离子以及钛蓝宝石激光器的10个波长上测量了作为标准探测器的陷阱探测器的响应度。在氦氖、氩氪离子激光波长测量结果的不确定度达到0．8×10-4，在钛蓝宝石激光器达到1．1×10-4。对标准探测器的面响应均匀性、非线性、偏振响应、角度响应等特性对响应度测量结果的影响进行了研究。

关键词：计量学辐射度光电探测器低温辐射计响应度

Probabilistic-Ellipsoid Hybrid Reliability Multi-Material Topology Optimization Method Based on Stress Constraint

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Computer Modeling in Engineering & Sciences 2024年第7期140卷 757-792页

作者： Zibin Mao Qinghai Zhao liang Zhang College of Mechanical and Electrical Engineering Qingdao UniversityQingdao266071China National Engineering Research Center for Intelligent Electrical Vehicle Power System Qingdao UniversityQingdao266071China

This paper proposes a multi-material topology optimization method based on the hybrid reliability of the probability-ellipsoid model with stress constraint for the stochastic uncertainty and epistemic uncertainty of mechanical loads in optimization *** probabilistic model is combined with the ellipsoidal model to describe the uncertainty of mechanical *** topology optimization formula is combined with the ordered solid isotropic material with penalization(ordered-SIMP)multi-material interpolation *** stresses of all elements are integrated into a global stress measurement that approximates the maximum stress using the normalized p-norm ***,the sequential optimization and reliability assessment(SORA)is applied to transform the original uncertainty optimization problem into an equivalent deterministic topology optimization(DTO)*** response surface and sparse grid technique are combined with SORA to get accurate information on the most probable failure point(MPP).In each cycle,the equivalent topology optimization formula is updated according to the MPP information obtained in the previous *** adjoint variable method is used for deriving the sensitivity of the stress constraint and the moving asymptote method(MMA)is used to update design ***,the validity and feasibility of the method are verified by the numerical example of l-shape beam design,T-shape structure design,steering knuckle,and 3D T-shaped beam.

关键词： Stress constraint probabilistic-ellipsoid hybrid topology optimization reliability analysis multi-material design