检索结果-南通市图书馆

Modeling the Covariance Matrix for the Power Spectra Before and After the BAO Reconstruction

Research in Astronomy and Astrophysics 2024年第12期24卷 158-176页

作者： ruiyang zhao Kazuya Koyama Yuting Wang Gong-Bo zhao National Astronomical Observatories Chinese Academy of Sciences School of Astronomy and Space Science University of Chinese Academy of Sciences Institute of Cosmology & Gravitation University of Portsmouth Institute for Frontiers in Astronomy and Astrophysics Beijing Normal University Chinese Academy of Sciences South America Center for Astronomy (CASSACA) National Astronomical Observatories of China

The baryon acoustic oscillations （BAO） reconstruction plays a crucial role in cosmological analysis for spectroscopic galaxy surveys because it can make the density field effectively more linear and more *** combination of the power spectra before and after the BAO reconstruction helps break degeneracies among parameters,then improves the constraints on cosmological *** is therefore important to estimate the covariance matrix between pre-and post-reconstructed power *** this work,we use perturbation theory to estimate the covariance matrix of the related power spectra multipoles,and check the accuracy of the derived covariance model using a large suite of dark matter halo catalogs at z=*** find that the diagonal part of the auto covariance is well described by the Gaussian prediction,while the cross covariance deviates from the Gaussian prediction quickly when k>0.1 h ***,we find the non-Gaussian effect in the nondiagonal part of the cross covariance is comparable to,or even stronger than,the pre-reconstruction *** adding the non-Gaussian contribution,we obtain good agreement between analytical and numerical covariance matrices in the non-diagonal part up to k;0.15 h *** agreement in the diagonal part is also improved,bu still under-predicts the correlation in the cross covariance block.

关键词： (cosmology:) cosmological parameters (cosmology:) large-scale structure of universe cosmology: theory

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Efficient flower-like ZnSe/Cu_(0.08)Zn_(0.92)S photocatalyst for hydrogen production application

引用

Frontiers of Chemical Science and Engineering 2023年第9期17卷 1301-1310页

作者： Ying Wang Yue Han ruiyang zhao Jishu Han Lei Wang Key Laboratory of Eco-chemical Engineering Ministry of EducationInternational Science and Technology Cooperation Base of Eco-chemical Engineering and Green ManufacturingCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao266042China Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection College of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao266042China College of Chemical Engineering Qingdao University of Science and TechnologyQingdao266042China

Photocatalytic hydrogen production utilizing abundant solar energy to produce high-calorie, clean, and pollution-free hydrogen is an important approach to solving environmental and resource problems. In this work, a high-efficiency flower-like ZnSe/Cu_(0.08)Zn_(0.92)S photocatalyst was constructed through element doping and the formation of a Z-scheme heterojunction. The synergistic effect of Cu doping and the built-in electric field in the heterojunction enhanced light absorption and utilization by the ZnSe/Cu_(0.08)Zn_(0.92)S microflowers, accelerated the separation and transfer of photogenerated electrons and effectively inhibited electron–hole recombination. Thus the photocatalytic hydrogen production ability of the ZnSe/Cu_(0.08)Zn_(0.92)S microflowers was increased significantly. The highly stable ZnSe/Cu_(0.08)Zn_(0.92)S microflowers could provide excellent catalysis of photocatalytic hydrogen production.

关键词： photocatalysis Cu_(0.08)Zn_(0.92)S ZnSe hydrogen production

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Chitosan-based carbon dots with multi-color-emissive tunable fluorescence and visible light catalytic enhancement properties

引用

Nano Research 2023年第2期16卷 1835-1845页

作者： Qiong Wu Shouyun Zhang Shuang Li Yan Yan Shitao Yu ruiyang zhao Lang Huang State Key Laboratory Base of Eco-Chemical Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042China Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101China

Carbon quantum dots(CQDs)are receiving increasing attention for their excellent photostability,low toxicity,and tunable fluorescence performance,but it is still challenging to prepare full-spectrum CQDs using only one single set of precursor and *** this study,P and N co-doped carbon dots(N,PR-CQDs)with multi-color-emissive tunable fluorescence from blue to green and orange were synthesized from bio-based chitosan,employing phosphoric acid as solvent and *** introduction of phosphoric acid successfully shortens the manufacturing reaction time,and the heteratomic functional groups of P–O/P=O on surface of carbon dots enrich the surface defect states,promoting n–π*transition,and therefore changing their electron structure/energy level to reduce the band gap,thus facilitating emission at long ***,increasing phosphoric acid concentration leads to characteristic excitation peaks red shift from 320 to 420 nm with the characteristic emission peaks red shift from 406 to 503 nm.A new emission peak at 610 nm appears,enabling N,PR-CQDs exhibit double emission peaks with fluorescence color from green to yellow to *** compositing with carbon nitride(g-C3N4),N,PR-CQDs work as photosensitizer and effectively narrow the energy gap(Eg)of g-C3N4 from 2.75 to 2.40 eV,endowing the photocatalyst higher visible light capture ability and broader light response *** photocatalytic degradation rate of rhodamine B(RhB)under visible light irradiation reaches up to 98.39%within 60 min using N,P20%-CQDs/g-C3N4 as catalyst,which is 1.4 times that of pure g-C3N4,and it is demonstrated that·O2−is the major active substance contributing for RhB degradation by de-ethyl and aromatic ring breakage.

关键词： carbon dots multicolor luminescence chitosan visible light catalysis photosensitizer

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A New Consistency Test forΛCDM Cosmology Using Galaxy Surveys

引用

Research in Astronomy and Astrophysics 2022年第6期22卷 183-189页

作者： Jinglan Zheng Gong-Bo zhao Yuting Wang Xiaoyong Mu ruiyang zhao Weibing Zhang Shuo Yuan David Bacon Kazuya Koyama National Astronomy Observatories Chinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Institute of Cosmology and Gravitation University of PortsmouthDennis Sciama BuildingPortsmouth PO13FXUK

We propose a new consistency test for theΛCDM cosmology using baryonic acoustic oscillations(BAO)and redshift space distortion(RSD)measurements from galaxy redshift ***,we determine the peak position of fσ8(z)in redshift z offered by an RSD measurement,and compare it to the one predicted by the BAO observables assuming a flatΛCDM *** demonstrate this new test using the simulated data for the DESI galaxy survey,and argue that this test complements those using the background observables alone,and is less subject to systematics in the RSD analysis,compared to traditional methods using values of fσ8(z)directly.

关键词： Cosmology-(cosmology:)dark energy-galaxies distances and redshifts

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Organic polaritonic light-emitting diodes with high luminance and color purity toward laser displays

引用

Light(Science & Applications) 2024年第9期13卷 1956-1963页

作者： Jianbo De ruiyang zhao Fan Yin Chunling Gu Teng Long Han Huang Xue Cao Cunbin An Bo Liao Hongbing Fu Qing Liao Beijing Key Laboratory for Optical Materials and Photonic Devices Department of ChemistryCapital Normal University100048 BeijingChina Beijing Special Engineering Design and Research Institute 100028 BeijingChina Institute of Process Engineering Chinese Academy of Sciences100190 BeijingChina Institute of Molecule Plus Tianjin University and Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)300072 TianjinChina School of Materials Science and Engineering Hunan University of Science and Technology411201 XiangtanHunanChina

Achieving high-luminescence organic light-emitting devices(OLEDs)with narrowband emission and high color purity is important in various optoelectronic *** displays exhibit outstanding advantages in next-generation display technologies owing to their ultimate visual experience,but this remains a great ***,we develop a novel OLED based organic single *** strongly coupling the organic exciton state to an optical microcavity,we obtain polariton electroluminescent(EL)emission from the polariton OLEDs(OPLEDs)with high luminance,narrow-band emission,high color purity,high polarization as well as excellent optically pumped polariton ***,we evaluate the potential for electrically pumped polariton laser through theoretical analysis and provide possible *** work provides a powerful strategy with a material–device combination that paves the way for electrically driven organic single-crystal-based polariton luminescent devices and possibly lasers.

关键词： pumped laser polarization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pathology of pain and its implications for therapeutic interventions

引用

Signal Transduction and Targeted Therapy 2024年第7期9卷 2851-2899页

作者： Bo Cao Qixuan Xu Yajiao Shi ruiyang zhao Hanghang Li Jie Zheng Fengyu Liu You Wan Bo Wei Department of General Surgery First Medical CenterChinese PLA General HospitalBeijing 100853China Medical School of Chinese PLA Beijing 100853China Neuroscience Research Institute and Department of Neurobiology School of Basic Medical SciencesKey Laboratory for NeuroscienceMinistry of Education/National Health CommissionPeking UniversityBeijing 100191China

Pain is estimated to affect more than 20%of the global population,imposing incalculable health and economic *** pain management is crucial for individuals suffering from ***,the current methods for pain assessment and treatment fall short of clinical *** from advances in neuroscience and biotechnology,the neuronal circuits and molecular mechanisms critically involved in pain modulation have been *** research achievements have incited progress in identifying new diagnostic and therapeutic *** this review,we first introduce fundamental knowledge about pain,setting the stage for the subsequent *** review next delves into the molecular mechanisms underlying pain disorders,including gene mutation,epigenetic modification,posttranslational modification,inflammasome,signaling pathways and *** better present a comprehensive view of pain research,two prominent issues,sexual dimorphism and pain comorbidities,are discussed in detail based on current *** status quo of pain evaluation and manipulation is summarized.A series of improved and innovative pain management strategies,such as gene therapy,monoclonal antibody,brain-computer interface and microbial intervention,are making strides towards clinical *** highlight existing limitations and future directions for enhancing the quality of preclinical and clinical *** to decipher the complexities of pain pathology will be instrumental in translating scientific discoveries into clinical practice,thereby improving pain management from bench to bedside.

关键词： pain thereby summarized

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Clinical analysis of 5-year survival and recurrence in giant retroperitoneal liposarcoma after surgery

引用

Chinese Medical Journal 2023年第3期136卷 373-375页

作者： Huan Deng Bo Cao Hao Cui Runkai Chen Hanghang Li ruiyang zhao Lin Chen Bo Wei Medical School of Chinese People’s Liberation Army Beijing 100853China Department of General Surgery The First Medical CenterChinese People’s Liberation Army General HospitalBeijing 100853China

To the Editor:Retroperitoneal liposarcoma(RLS)pertains to one of the rare malignant tumors originated from the *** is evaluated as the most common type of retroperitoneal *** can be divided into four subtypes according to the pathological classification,which includes well-differentiated liposarcoma(WDL),dedifferentiated liposarcoma(DDL),myxoid cell liposarcoma(MLS),and pleomorphic liposarcoma(PLS).

关键词： sarcoma retroperitoneal peritoneal

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

共轭聚合物的结构缺陷及对光电性能的影响

引用

高分子学报 2011年第9期21卷 985-1000页

作者：赵瑞阳张文思马於光吉林大学化学学院超分子结构与材料国家重点实验室长春130012

共轭聚合物是由大量重复基元通过化学键连接的一维体系,具有独特的光、电、电化学等性质,已经引起学术界的广泛关注.由于共轭聚合物结构(链段、构象、聚集态)的复杂性,即使在非常精细的合成条件下,少量结构缺陷的形成也是难免的.共轭聚... 详细信息

共轭聚合物是由大量重复基元通过化学键连接的一维体系,具有独特的光、电、电化学等性质,已经引起学术界的广泛关注.由于共轭聚合物结构(链段、构象、聚集态)的复杂性,即使在非常精细的合成条件下,少量结构缺陷的形成也是难免的.共轭聚合物,特别在其固态状态下激发能量能够有效传递,使得少量缺陷的影响被放大,对其光电性质产生巨大影响.因此对共轭聚合物结构缺陷的研究,包括缺陷成因与控制、缺陷密度的分析、缺陷的分子结构与电子结构特征等,对于高品质材料的研发具有重要的意义.本文对国内外研究进展进行了比较详尽的介绍.

关键词：共轭聚合物缺陷聚对亚苯基乙烯聚芴

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

白斑狗鱼Wnt4基因的克隆及其表达分析

引用

水产科学 2023年第3期42卷 432-439页

作者：李菁赵瑞阳张俊杰新疆农业大学生命科学学院新疆乌鲁木齐830052

为探讨无翅型MMTV整合位点家族成员(Wnt4)基因在白斑狗鱼性别发育过程中的作用,通过反转录PCR法克隆获得白斑狗鱼Wnt4基因片段,运用ClustalX和MEGA6.1软件对其氨基酸同源性及物种进化关系进行分析。研究结果显示,克隆获得的Wnt4基因片... 详细信息

为探讨无翅型MMTV整合位点家族成员(Wnt4)基因在白斑狗鱼性别发育过程中的作用,通过反转录PCR法克隆获得白斑狗鱼Wnt4基因片段,运用ClustalX和MEGA6.1软件对其氨基酸同源性及物种进化关系进行分析。研究结果显示,克隆获得的Wnt4基因片段长度为1505bp,其中开放阅读框长度为1059bp,编码352个氨基酸。氨基酸同源性分析表明,白斑狗鱼与虹鳟、青鳉同源性较高,与非洲爪蟾和褐家鼠等相似性则较低。系统发育结果显示,白斑狗鱼与白边锯鳞鱼亲缘关系最近,与海胆和栉孔扇贝、厚壳贻贝的亲缘关系最远。实时荧光定量PCR分析显示,Wnt4基因在白斑狗鱼卵巢、精巢、肠道、肌肉、鳃、脑等组织中均有表达,卵巢的表达最明显,卵巢表达量明显高于精巢,Wnt4基因在卵巢后期发育过程中,表达量呈现下降趋势。研究结果表明,Wnt4基因在白斑狗鱼卵巢发育的早期参与到某些器官的形成及功能的维持。本研究结果可为白斑狗鱼的性别发育机制提供参考资料。

关键词：白斑狗鱼 Wnt4基因克隆生物信息学组织表达

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

光致相变型偶氮苯基共聚物的制备及在可逆胶黏剂领域的应用

引用

高分子材料科学与工程 2023年第9期39卷 144-149页

作者：陈隆旋公丕文穆家慧赵瑞阳白佳玉青岛科技大学化工学院山东青岛266000 沈阳医学院辽宁沈阳110034

光致可逆胶黏剂的设计和开发,在一定程度上解决了传统胶黏剂在分离、回收和修复粘接表面等方面存在的问题。文中设计并合成了一种具有光致相态转换性能的偶氮苯基共聚物(PNY-Azo),其反式构象(固态)和顺式构象(液态)在黏附强度上表现出... 详细信息

光致可逆胶黏剂的设计和开发,在一定程度上解决了传统胶黏剂在分离、回收和修复粘接表面等方面存在的问题。文中设计并合成了一种具有光致相态转换性能的偶氮苯基共聚物(PNY-Azo),其反式构象(固态)和顺式构象(液态)在黏附强度上表现出较大差异,实现了对黏附基材的光控黏附和剥离,可应用于制备光致可逆胶黏剂。通过在共聚物侧链上增加氧原子数量,以此增强了共聚物分子链间的超分子作用(氢键作用)以及共聚物的链间缠结性能,从而有效地提高了PNY-Azo的黏结强度,其反式构象状态下黏结强度最高可达4.59 MPa。

关键词：光响应材料偶氮苯基共聚物固-液转换可逆胶黏剂黏结强度

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：