检索结果-南通市图书馆

Shock effects and history of the Yanzhuang meteorite: a case different from L-chondrites

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

Chinese Science bulletin 1997年第22期42卷 1889-1894页

作者： chen, m Xie, XD Chinese Acad Sci Guangzhou Inst Geochem Guangzhou 510640 Peoples R China

mANY ordinary chondrites contain the networks of black veins with the widths from

关键词： chondrite H-group L-group shock vein shock effect history.

Glutamatergic CYLD deletion leads to aberrant excitatory activity in the basolateral amygdala:association with enhanced cued fear expression

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第11期20卷 3259-3272页

作者： Huidong Li Faqin Li Zhaoyi chen Erwen Wu Xiaoxi Dai Danni Li Haojie An Shiyi Zeng Chunyan Wang Li Yang cheng Long School of Life Sciences South China Normal UniversityGuangzhouGuangdong ProvinceChina School of Life Sciences Guangzhou UniversityGuangzhouGuangdong ProvinceChina Guangdong Provincial Key Laboratory of major Obstetric Diseases The Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina South China Normal University-Panyu Central Hospital Joint Laboratory of Translational medical Research Panyu Central HospitalGuangzhouGuangdong ProvinceChina

Neuronal activity,synaptic transmission,and molecular changes in the basolateral amygdala play critical roles in fear ***(CYLD)is a deubiquitinase that negatively regulates the nuclear factor kappa-b *** is well studied in non-neuronal cells,yet underinvestigated in the brain,where it is highly *** studies have shown involvement of CYLD in the remodeling of glutamatergic synapses,neuroinflammation,fear memory,and anxiety-and autism-like ***,the precise role of CYLD in glutamatergic neurons is largely ***,we first proposed involvement of CYLD in cued fear *** next constructed transgenic model mice with specific deletion of Cyld from glutamatergic *** results show that glutamatergic CYLD deficiency exaggerated the expression of cued fear in only male ***,loss of CYLD in glutamatergic neurons resulted in enhanced neuronal activation,impaired excitatory synaptic transmission,and altered levels of glutamate receptors accompanied by over-activation of microglia in the basolateral amygdala of male ***,our study suggests a critical role of glutamatergic CYLD in maintaining normal neuronal,synaptic,and microglial *** may contribute,at least in part,to cued fear expression.

关键词： basolateral amygdala cued fear expression cylindromatosis deubiquitinase glutamate receptor 1 glutamatergic neuron microglial activation N-methyl-D-aspartate receptor 1 neuronal activation synaptic transmission

Survivorship characteristics and adaptive mechanisms of phytoplankton assemblages in ballast water

在线全文

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2019年第2期37卷 580-588页

作者： WU Huixian SHEN chen WANG Qiong Richard b. ARONSON chen chen XUE Junzeng College of marine Ecology and Environment Shanghai Ocean University Shanghai 201306 China ballast Water Detecting Lab Shanghai Ocean University Shanghai 201306 China Department of biological Sciences Florida Institute of Technology Melbourne Florida 32901 USA

Phytoplankton diversity and abundance were determined in ballast water from 26 vessels in the Shanghai Yangshan Deep-Water Port from April 2015 to January 2016. In total, 84 species of phytoplankton were identified, belonging to 43 genera and 5 phyla. bacillariophyta (75.0%, including 30 genera and 63 species) were the dominant algae in the ballast water. Their density ranged from (5.55±9.62) SD to (1.878±0.872)×10 3 cells/L, with a mean of 410.1 cells/L. Nine potentially harmful phytoplankton taxa were detected: Ceratium furca , Ce . marcroceros , Leptocylindrus danicus , Coscinodiscus radiatus , Co . granii , Prorocentrum micans , melosira sulcata , meuniera membranacea and Skeletonema costatum . Our survey and identification results showed that microcystis aeruginosa , Ankistrodesmus falcatus and Scenedesmus survived in the high-salinity ballast water, even though they are freshwater species. We identified the common features of surviving phytoplankton and impacts on the phytoplankton assemblage of ballast water age and source. Our goal was to understand the adaptative mechanisms of phytoplankton in ballast water, providing statistical and theoretical support for future ballast water research and suggesting a scientific basis of ballast water management and inspection of vessels entering the port.

关键词： diversity abundances Yangshan Port dominant algae ballast water age source

Recent strategies to improve moisture stability in metal halide perovskites materials and devices

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第2期31卷 219-235页

作者： chenxiao Zhou Alexey b.Tarasov Eugene A.Goodilin Pengwan chen Hao Wang Qi chen School of materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Faculty of materials Science Lomonosov Moscow State UniversityLenin Hills119991 MoscowRussia Department of Chemistry Lomonosov Moscow State UniversityLenin Hills119991 MoscowRussia State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China

At present,the stability of the new generation of solar cells based on hybrid perovskites is the bottleneck for their practical *** effects,high temperature,ultraviolet light,humidity and other known or still unknown factors might cause reduction of effectiveness or even irreversible loss of materials properties due to decomposition of functional layers within perovskite solar cells(PSCs).These factors alone have a serious impact on each component of the device,while their combinations lead to much more complicated effects and *** review focuses on the stability of PSCs and the degradation of the device in a humid *** assess the instability factors and deep-seated principles of evolution of the device structure in a humidity environment with the emphasis on the influence on their *** related solutions are reviewed from the perspective of the encapsulation,perovskite active layer,carrier transport layer and *** with the latest research,we believe that the waterproof strategy of PSCs requires either tight encapsulation or thorough modifications in the device ***,it is important to develop feasible strategies to improve the overall device stability over humid according to the target characteristics of various devices.

关键词： Perovskite solar cells Water Stability Composition Encapsulation

Effects of adenosine triphosphate concentration on motor force regulation during skeletal muscle contraction

在线全文

学校读者我要写书评

暂无评论

Acta mechanica Sinica 2017年第2期33卷 243-249页

作者： J. Wei C. Dong b. chen Department of Engineering mechanics Zhejiang UniversityHangzhou 310058 China

We employ a mechanical model of sarcomere to quantitatively investigate how adenosine triphosphate (ATP) concentration affects motor force regulation during skeletal muscle contraction. Our simulation indicates that there can be negative cross-bridges resisting contraction within the sarcomere and higher ATP concentration would decrease the resistance force from negative cross-bridges by promoting their timely detachment. It is revealed that the motor force is well regulated only when ATP concentration is above a certain level. These predictions may provide insights into the role of ATP in regulating coordination among multiple motors.

关键词： motor force regulation ATP muscle contraction myosin

On a biseparability criterion of bipartite qudit state

在线全文

学校读者我要写书评

暂无评论

Chinese Physics b 2019年第8期28卷 42-49页

作者： b benzimoun m Daoud LPHE-modeling and Simulation Faculty of SciencesUniversity Mohammed ⅤRabatMorocco Department of Physics Faculty of Sciences-Ain ChockUniversity Hassan ⅡCasablancaMorocco Abdus Salam International Centre for Theoretical Physics TriesteItaly

In this paper,we propose a new approach to tackle the separability problem for bipartite qudit *** is based on the majorana representation which allows to represent a N-spinors(qudit)as a symmetric state of N spin-1/*** also discuss how we can exploit such representation and the notion of the biseparability of multipartite qubit states in the sense to establish new criteria of the separability problem based on the PPT and concurrence.

关键词： separability bipartite qubit state partial separability majorana representation

Phase diagrams and magnetic properties of the mixed spin-1 and spin-3/2 Ising ferromagnetic thin film: monte Carlo treatment

在线全文

学校读者我要写书评

暂无评论

Chinese Physics b 2019年第2期28卷 414-419页

作者： b boughazi m boughrara m Kerouad Laboratoire Physique des matériaux et modélisation des Systémes(LP2mS) UnitéAssociée au CNRST-URAC:08Faculty of SciencesUniversity Moulay Ismail

Phase diagrams and magnetic properties of the mixed spin-1 and spin-3/2 Ising film with different single-ion anisotropies are investigated, by the use of monte Carlo simulation based on heat bath algorithms. The effects of the crystal-fields and the surface coupling on the phase diagrams are investigated in detail and the obtained phase diagrams are presented. Depending on the Hamiltonian parameters, the system exhibits both second-and first-order phase transitions besides tricritical point, triple point, and isolated critical end point.

关键词： monte Carlo simulation thin film phase diagrams magnetic properties

mODELING AND FORECASTING OF STOCK mARKETS UNDER A SYSTEm ADAPTATION FRAmEWORK

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2012年第4期25卷 641-674页

作者： Xiaolian ZHENG ben m.chen The Department of Electrical & Computer Engineering The National University of Singapore

This paper adopts the concept of dynamic feedback systems to model the behavior of financial markets, or more specifically, the stock market from a dynamic system point of view. based on a feedback adaptation scheme, the authors model the movement of a stock market index within a framework that is composed of an internal dynamic model and an adaptive filter. The output-error model is adopted as the internal model whereas the adaptive filter is a time-varying state space model with instrumental variables. Its input-output behavior, and internal as well as external forces are then identified. Special attention has also been paid to the recent financial crisis by examining the movement of Dow Jones Industrial Average （DJIA） as an example to illustrate the advantage of the proposed framework. Supported by time-varying causality tests, five influential factors from economic and sentiment aspects are introduced as the input of this framework. Testing results show that the proposed framework has a much better prediction performance than the existing methods, especially in complicated economic situations. An application of this framework is also presented with focuses on forecasting the turning periods of the market trend. Realizing that a market trend is about to change when the external force begins to exhibit clear patterns in its frequency responses, the authors develop a set of rules to recognize this kind of clear patterns. These rules work well for stock indexes from US, China and Singapore.

关键词： Complex systems financial modeling financial systems market forecasting system economics.

Determination of Vapor Pressure of Liquid Copper by Carrier Gas method

在线全文

学校读者我要写书评

暂无评论

Journal of materials Science & Technology 2013年第12期29卷 1209-1213页

作者： Y.J.Duan b.chen Y.C.ma m.Gao K.Liu Institute of metal Research Chinese Academy of Sciences

The relationship between the vapor pressure of liquid copper and the flow rate of carrier gas argon was discussed, when the carrier gas method was used to determine the vapor pressure of liquid copper at 1892 K. The proper argon flow rate range obtained was 150-500 mL/min and enough evidence was provided to verify the vapor pressure-flow rate of carrier gas relationship at the target temperature. based on the proper flow rate range, the vapor pressure of liquid copper was measured at 1609-1892 K. The relationship of vapor pressure-temperature obtained by the method of regression analysis can be expressed as： In（p/Pa） = （25.470 -I- 0.903） - （39099.8 -4- 1574.5）/T, Further, the thermodynamic properties including the heat of vaporization and the Gibbs free energy of the Cu （I） = Cu （g） reaction were calculated by the vapor pressiJre obtained over the temperature range covered.

关键词： Carrier gas method Liquid copper vapor pressure Thermodynamic property of copper