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High‑accuracy measurement of Compton scattering in germanium for dark matter searches

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Nuclear Science and Techniques 2022年第12期33卷 75-87页

作者： Hai‑Tao Jia Shin‑Ted Lin Shu‑Kui Liu Hsin‑Chang Chi Muhammed Deniz Chang‑Hao Fang Peng Gu Xi Jiang Yi‑Ke Shu Qian‑Yun Li Yu Liu Ren‑Ming‑Jie Li Chen‑Kai Qiao Chang‑Jian Tang Henry Tsz‑King Wong Hao‑Yang Xing Li‑Tao Yang Qian Yue Yu‑Lu Yan kang‑kang zhao Jing‑Jun Zhu College of Physics Sichuan University610065 ChengduChina Department of Physics National Dong Hwa University97401 ShoufengHualienChina Department of Physics Dokuz Eylül University35160 BucaİzmirTurkey Institute of Physics Academia Sinica11529 TaipeiChina Key Laboratory of Particle and Radiation Imaging(Ministry of Education)and Department of Engineering Physics Tsinghua University100084 BeijingChina Institute of Nuclear Science and Technology Sichuan University610065 ChengduChina

Compton scattering with bound electrons contributes to a significant atomic effect in low-momentum transfer,yielding background structures in direct light dark matter searches as well as low-energy rare event *** report the measurement of Compton scattering in low-momentum transfer by implementing a 10-g germanium detector bombarded by a^(137)Cs source with a radioactivity of 8.7 mCi and a scatter photon captured by a cylindrical NaI(Tl)detector.A fully relativistic impulse approximation combined with multi-configuration Dirac–Fock wavefunctions was evaluated,and the scattering function of Geant4 software was replaced by our calculation *** measurements show that the Livermore model with the modified scattering function in Geant4 is in good agreement with the experimental *** is also revealed that atomic many-body effects significantly influence Compton scattering for low-momentum transfer(sub-keV energy transfer).

关键词： Compton scattering experiment Germanium detector Atomic many-body effects Geant4 Dark matter

Role of triggering receptor expressed on myeloid cells 1/2 in secondary injury after cerebral hemorrhage

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World Journal of Clinical Cases 2025年第9期13卷 1-12页

作者： Fan Yi Hao Wu Hai-kang zhao Xi’an Medical University Xi’an 710021Shaanxi ProvinceChina Department of Neurosurgery The Second Affiliated Hospital of Xi’an Medical UniversityXi’an 710038Shaanxi ProvinceChina

Intracerebral hemorrhage(ICH)is a common severe emergency in neurosurgery,causing tremendous economic pressure on families and society and devastating effects on patients both physically and psychologically,especially among patients with poor functional *** is often accompanied by decreased consciousness and limb *** seriously affects patients’ability to live *** rapid advances in neurosurgery have greatly improved patient survival,there remains insufficient evidence that surgical treatment significantly improves long-term *** in-depth pathophysiological studies after ICH,increasing evidence has shown that secondary injury after ICH is related to long-term prognosis and that the key to secondary injury is various immune-mediated neuroinflammatory reactions after *** basic and clinical studies of various systemic inflammatory diseases,triggering receptor expressed on myeloid cells 1/2(TREM-1/2),and the TREM receptor family is closely related to the inflammatory *** inflammatory diseases can be upregulated and downregulated through receptor *** the TREM receptor functions after ICH,the types of results from intervention,and whether the outcomes can improve secondary brain injury and the long-term prognosis of patients are *** analysis of relevant research results from basic and clinical trials revealed that the inhibition of TREM-1 and the activation of TREM-2 can alleviate the neuroinflammatory immune response,significantly improve the long-term prognosis of neurological function in patients with cerebral hemorrhage,and thus improve the ability of patients to live independently.

关键词： Cerebral hemorrhage Secondary injury Triggering receptor expressed on myeloid cells 1/2 Neurosurgery Inflammatory response

一株高产琼胶酶菌株MA-B22的分子鉴定与产酶条件优化

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水产学报 2009年第6期33卷 1037-1043页

作者：卢斌柯才焕杨明康康赵晶厦门大学海洋与环境学院

琼胶酶在多糖降解应用中的作用日益重要,而从海洋微生物中筛选琼胶酶高产菌株成为一个重要途径。本研究从养殖的杂色鲍体内分离到一株高产琼胶酶的菌株MA-B22。该菌为革兰氏阴性菌,经16S rRNA序列鉴定表明,与Tamlana agarivorans ***.具... 详细信息

琼胶酶在多糖降解应用中的作用日益重要,而从海洋微生物中筛选琼胶酶高产菌株成为一个重要途径。本研究从养殖的杂色鲍体内分离到一株高产琼胶酶的菌株MA-B22。该菌为革兰氏阴性菌,经16S rRNA序列鉴定表明,与Tamlana agarivorans ***.具有99%同源性,因此初步定为Tamlana sp.。在2216E培养基中该菌株在培养时间60h,温度25℃,起始pH为6.0条件下产酶活性最高。基于上述培养条件,通过单因素和正交实验确定了培养基的最佳基本组成:氮源为牛肉膏(其最适浓度为6.0‰),碳源为琼脂(其最适浓度为2.5‰),配制培养基的人工海水的最适盐度为25。经培养条件优化后,该菌胞外琼胶酶活力可达1021.79U/mL,较优化前提高8.82倍。实验首次对Tamlana sp.属的琼胶酶活性进行确定并优化其产酶条件,为构建琼胶酶高产工程菌株提供了基础,并可能为今后鲍养殖提供潜在的益生菌。

关键词：琼胶酶酶活力培养基

Fatigue Life Prediction for NiTi Shape Memory Alloy Micro-tubes Under Uniaxial Stress-Controlled One-Way Shape Memory Cyclic Loading

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Acta Mechanica Solida Sinica 2022年第1期35卷 15-25页

作者： Tianxing zhao Guozheng kang Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province School of Mechanics and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Institute of Applied Mechanics State Key Laboratory of Traction PowerSouthwest Jiaotong UniversityChengdu 610031China

By choosing the dissipation energy as the damage variable,corresponding damage evolution equations are established,respectively,for the mechanical cyclic loading part and the thermal one during the thermo-mechanical cyclic loading of NiTi shape memory alloys(SMAs)involving one-way shape memory effect(simply denoted as the OWSME cycling).And then,the evolution law of total damage is obtained by a superposition of such two damage ***,the uniaxial OWSME fatigue lives of NiTi SMA micro-tubes are predicted by combining the proposed damage model with an adopted failure *** results show that all the predicted fatigue lives are located within the twice scatter band with regard to the experimental ones,and most of them are located within a scatter band of 1.5 *** is indicated that the predicted OWSME fatigue lives are in good agreement with the experimental ones.

关键词： NiTi shape memory alloy One-way shape memory effect Damage evolution Fatigue life prediction Uniaxial loading

Dynamic data packing towards the optimization of QoC and QoS in networked control systems

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Science China(Technological Sciences) 2016年第1期59卷 72-80页

作者： kang Yu zhao YunBo Department of Automation and State Key Laboratory of Fire Science University of Science and Technology of China Key Laboratory of Technology in Geo-Spatial Information Processing and Application System Chinese Academy of Sciences Department of Automation Zhejiang University of Technology

A class of networked control systems is investigated whose communication network is shared with other applications. The design objective for such a system setting is not only the optimization of the control performance but also the efficient utilization of the communication resources. We observe that at a large time scale the data packet delay in the communication network is roughly varying piecewise constant, which is typically true for data networks like the Internet. Based on this observation, a dynamic data packing scheme is proposed within the recently developed packet-based control framework for networked control systems. As expected this proposed approach achieves a fine balance between the control performance and the communication utilization: the similar control performance can be obtained at dramatically reduced cost of the communication resources. Simulations illustrate the effectiveness of the proposed approach.

关键词： networked control systems packet delay variation dynamic data packing quality of control quality of service

Identification of a marine woloszynskioid dinoflagellate Biecheleriopsis adriatica and germination of its cysts from southern Chinese coasts

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Journal of Environmental Sciences 2018年第4期30卷 246-254页

作者： Wei kang zhao-Hui Wang Key and Open Laboratory of Marina and Estuary Fisheries Ministry of Agriculture of China East China Sea Fisheries Research InstituteChinese Academy of Fishery Sciences College of Life Science and Technology Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education InstitutesJinan University Engineering Research Center of Tropical and Subtropical Aquatic Ecological Engineering Ministry of Education

A strain of small-sized dinoflagellates, isolated from the culture of sediment incubation collected from the coastal areas in southern China, has been identified under microscopical observation and r DNA sequence. Surface sediments from two sea areas in the southern Chinese coastal waters were incubated for 20 and 40 days, and germinated vegetative cells were observed. The cells were identified as species in the Suessiaceae based on the morphological characteristics, ultrastructural features of the cell, as well as its swimming behavior. The studied strain clusters into a well-supported clade together with six sequences of Biecheleriopsis adriatica in the phylogenetic tree based on the large subunit（LSU） rDNA sequence. Therefore, the strain has been identified as B. adriatica based on morphological observation and phylogenetic analysis. B. adriatica was the dominant dinoflagellate species in the germinated phytoplankton community from both sea areas,which contributed 50%–83% to the total germinated dinoflagellates averagely. However,B. adriatica has not been reported in previous phytoplankton surveys, and was probably ignored or misidentified due to its small size and thin wall. The frequent and abundant occurrence of B. adriatica in the germinated phytoplankton community of many sea areas of the southern Chinese coastal waters suggests its wide and abundant distribution in these sea areas.

关键词： Biecheleriopsis adriatica Cyst Germination Phylogeny Southern China

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陶瓷轴承球渗透检验自动分选系统

无损检测 2003年第6期25卷 296-301页

作者：李自根吴楠松顾宝康王肇康上海材料研究所上海200437

采用渗透检测技术对陶瓷球表面缺陷进行检测。通过实验得出裂纹显示宽度与实际宽度的关系。在此基础上研制出电荷耦合器件 (CCD)图像摄取和计算机图像处理的机电一体化渗透检测自动分选系统 ,检测灵敏度≤ 1μm。系统不仅可用于陶瓷球。

关键词：渗透检验陶瓷轴承球图像处理自动分选系统电荷耦合器件机电一体化

Miscibility and Crystallization Behavior of Novel Branched Poly(ethylene succinate)/Poly(vinyl phenol) Blends

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Chinese Journal of Polymer Science 2019年第11期37卷 1169-1175页

作者： kang-Jing Zhang zhao-Bin Qiu State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology

The blends of novel branched poly(ethylene succinate)(b-PES) and poly(vinyl phenol)(PVPh) were prepared v ia a solution and casting method. The miscibility, melting behavior, spherulitic morphology and growth, and crystal structure of b-PES/PVPh blends were investigated in detail. PVPh was miscible with b-PES over the whole compositions as evidenced by the single composition dependent glass transition temperature. Double melting behavior occurred in neat b-PES and b-PES/PVPh 85/15 blend after isothermal melt crystallization, which may be explained by the melting, recrystallization, and remelting mechanism. In addition, the depression of equilibrium melting point of an 85/15 blend was also found, confirming again the miscibility between the two components. The addition of PVPh caused the decrease of nucleation density and crystal growth rates of b-PES spherulites in the blend. The crystal structure of b- PES was unchanged before and after blending;moreover, the crystallinity of b-PES decreased slightly in the blend.

关键词： Polymer blends Miscibility Crystallization behavior

Self-Tuning Asynchronous Filter for Linear Gaussian System and Applications

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IEEE/CAA Journal of Automatica Sinica 2018年第6期5卷 1054-1061页

作者： Wenjun Lv Yu kang Yunbo zhao Department of Automation University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Fire Science Department of Automation and Institute of Advanced TechnologyUniversity of Science and Technology of ChinaHefei 230027China Key Laboratory of Technology in GeoSpatial Information Processing and Application System Chinese Academy of SciencesBeijing 100190China College of Information Engineering Zhejiang University of TechnologyHangzhou 310023China

In this paper, optimal filtering problem for a class of linear Gaussian systems is studied. The system states are updated at a fast uniform sampling rate and the measurements are sampled at a slow uniform sampling rate. The updating rate of system states is several times the sampling rate of measurements and the multiple is constant. To solve the problem,we will propose a self-tuning asynchronous filter whose contributions are twofold. First, the optimal filter at the sampling times when the measurements are available is derived in the linear minimum variance sense. Furthermore, considering the variation of noise statistics, a regulator is introduced to adjust the filtering coefficients adaptively. The case studies of wheeled robot navigation system and air quality evaluation system will show the effectiveness and practicability in engineering.

关键词： Air quality evaluation system linear Gaussian system wheeled robot navigation system