检索结果-南通市图书馆

Role of maternal-fetal immune tolerance in the establishment and maintenance of pregnancy

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2024年第12期137卷 1399-1406页

作者： Jingjing Wang tao han Xiaoming Zhu Department of Obstetrics and Gynaecology Tangdu HospitalAir Force Medical UniversityXi’anShaanxi 710038China Center for Mitochondrial Biology and Medicine School of Life Science and TechnologyXi’an Jiaotong UniversityXi’anShaanxi 710049China Department of Orthopedics Hainan Branch of PLA General HospitalSanyaHainan 572013China Department of Obstetrics and Gynaecology Hainan Branch of PLA General HospitalSanyaHainan 572013China

Normal pregnancy is a contradictory and complicated physiological *** the fetus carries the human leukocyte antigen(HLA)inherited from the paternal line,it does not cause maternal immune *** the only exception to immunological principles,maternal-fetal immune tolerance has been a reproductive immunology *** early pregnancy,fetal extravillous trophoblast cells(EVTs)invade decidual tissues and come into direct contact with maternal decidual immune cells(DICs)and decidual stromal cells(DSCs)to establish a sophisticated maternal-fetal *** study reviews previous research results and focuses on the establishment and maintenance mechanism of maternal-fetal tolerance based on maternal-fetal *** into maternal-fetal tolerance will not only improve understanding of normal pregnancy but will also contribute to novel therapeutic strategies for recurrent spontaneous abortion,pre-eclampsia,and premature birth.

关键词： Maternal-fetal interface Immune tolerance Trophoblasts Decidual stromal cells Decidual immune cells

Carbon efficiency modeling and optimization of solar-powered cellular networks

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第5期67卷 228-243页

作者： Yuxi ZHAO Xiaohu GE Wen YAN tao han Yi ZHONG School of Electronic Information and Communications Huazhong University of Science and Technology Huawei Technology Co. Ltd.

As wireless communication traffic experiences rapid growth, the carbon emissions caused by the communication industry are also on the rise. To achieve “carbon neutrality”, researchers are considering the use of renewable energy sources to power cellular networks, thereby reducing carbon emissions. However, a challenge arises when using renewable energy, specifically owing to the unpredictable nature of both the energy consumption of the cellular network and the power generation from renewable sources. This inconsistency results in low renewable energy utilization and reduced carbon efficiency. Herein, we construct a carbon efficiency model of solar-powered cellular networks using practical data from solar radiation. We propose a mechanism that alternately optimizes the performance of the renewable energy network and the cellular network. This approach is based on convex optimization theory and the Dinkelback algorithm, and it leads to the design of a carbon efficiency optimization algorithm. This algorithm aims to improve the carbon efficiency of cellular networks and reduce their carbon emissions. Simulation results demonstrate that our optimization scheme yields a maximum improvement of 2.56 × 108bps/g in the carbon efficiency of the cellular network as compared to conventional power allocation schemes such as the traditional water filling method and heuristic energy sharing and charge/discharge algorithms.

关键词： cellular networks renewable energy carbon efficiency convex optimization theory dinkelbach

Feasibility of medical radioisotope production based on the proton beams at China Spallation Neutron Source

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2024年第6期35卷 26-39页

作者： Bing Jiang Bin-Bin Tian han-tao Jing Qi-Fan Dong Spallation Neutron Source Science Center Dongguan 523803China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China University of Chinese Academy of Sciences Beijing 100049China

The utilization of a proton beam from the China Spallation Neutron Source(CSNS)for producing medical radioisotopes is appealing owing to its high current intensity and high *** medical isotope production based on the proton beam at the CSNS is significant for the development of future radiopharmaceuticals,particularly for theα-emitting *** production yield and activity of typical medical isotopes were estimated using the FLUKA *** results indicate that the 300-MeV proton beam with a power of 100 kW at CSNS-II is highly suitable for proof-of-principle studies of most medical *** particular,this proton beam offers tremendous advantages for the large-scale production of alpha radioisotopes,such as 225Ac,whose theoretical production yield can reach approximately 57 Ci/*** on these results,we provide perspectives on the use of CSNS proton beams to produce radioisotopes for medical applications.

关键词： CSNS proton beam Medical isotope production α-Emitting radionuclides Nuclidic purity analysis

Defect-manipulated magnetoresistance and above-room-temperature ferromagnetism in two-dimensional BaNi_(2)V_(2)O_(8)

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第3期35卷 523-527页

作者： Pengfei Tan Chuanhui Zhu Jinjin Yang Shuang Zhao tao Xia Mei-Huan Zhao tao han Zheng Deng Man-Rong Li Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of ChemistrySun Yat-sen UniversityGuangzhou 510006China School of Science and Engineering The Chinese University of Hong KongShenzhen 518172China Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Science Hainan UniversityHaikou 570228China

The intricate correlation between multiple degrees of freedom and physical properties is a fascinating area in solid state chemistry and condensed matter ***,we report a quantum-magnetic system BaNi_(2)V_(2)O_(8)(BNVO),in which the spin correlation was modulated by unusual oxidation state,leading to different magnetic *** BNVO was modified with topochemical reduction(TR)to yield TR-BNVO with partially reduced valance state of Ni^(+)in the two-dimensional NiO_(6)-honeycomb ***,the antiferromagnetic order is suppressed by the introduction of locally interposed Ni^(+)and oxygen vacancies,resulting in a ferromagnetic ground state with the transition temperature up to 710 K.A positive magnetoresistance(7.5%)was observed in the TR-BNVO at 40 K under 7 *** findings show that topological reduction is a powerful approach to engineer low-dimensional materials and accelerate the discovery of new quantum magnetism.

关键词： Layered honeycomb oxide Topochemical reduction Oxygen vacancies Ferromagnetism Magnetoresistance

Photoelectrocatalytic hydrogen evolution and synchronous degradation of organic pollutants by pg-C_(3)N_(4)/β-FeOOH S-scheme heterojunction

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2024年第4期67卷 1238-1252页

作者： LI XiBao han tao ZHOU YingTang XIE Yu LUO YiDan HUANG JunTong CHEN Zhi DENG Fang School of Materials Science and Engineering Nanchang Hangkong UniversityNanchang 330063China National-Local Joint Engineering Research Center of Heavy Metal Pollutants Control and Resource Utilization Nanchang Hangkong UniversityNanchang 330063China Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control National Engineering Research Center for Marine AquacultureMarine Science and Technology CollegeZhejiang Ocean UniversityZhoushan 316022China

Crafting photoelectrocatalytic materials with robust oxidation-reduction properties for simultaneous hydrogen evolution and pollutant degradation poses a formidable *** this study,a pg-C_(3)N_(4)/β-FeOOH S-scheme heterostructure with a special energy band structure was developed by anchoring porous pg-C_(3)N_(4)on needle shapedβ-*** as a hole extraction layer,needle-leaf-likeβ-FeOOH can facilitate efficient hole migration and enhance charge ***,the optimized 0.2-pg-C_(3)N_(4)/β-FeOOH could degrade 78%of ofloxacin(OFLO)in 90 *** organic pollutants could absorb a large number of holes,which prompted a greater proportion of photogenerated electrons to actively participate in the hydrogen evolution reaction at the ***,the hydrogen production of 0.2-pg-C_(3)N_(4)/β-FeOOH reached 1452.88μmol cm^(-2)h^(-1),exhibiting a notable increase of 61.81-165.12μmol cm^(-2)h^(-1)compared with that in the absence of *** and theoretical calculation results underscore that this investigation is grounded in a distinctive electron and hole dual channel transfer *** findings offer novel insights for the future development of S-scheme heterojunction photoelectrocatalytic materials capable of concurrently degrading pollutants and promoting hydrogen evolution.

关键词： photoelectrocatalysis hydrogen evolution degradation synchronous S-scheme heterojunction

High-precision nondestructive evaluation of a thermal barrier coating based on perovskite quantum dot anion exchange

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第5期17卷 4582-4592页

作者： tao han Shufang Ding Zifan Wang Sirong Jiang Pengjiang Jing Tianshang Yi Yaqi Chen Chunzhi Jiang Xiaofeng Zhang Microelectronics and Optoelectronics Technology Key Laboratory of Hunan Higher Education School of Physics and Electronic Electrical EngineeringXiangnan UniversityChenzhou 423000China National Engineering Laboratory for Modern Materials Surface Engineering Technology&The Key Lab of Guangdong for Modern Surface Engineering Technology Guangdong Institute of New MaterialsGuangdong Academy of SciencesGuangzhou 510650China

Thermal barrier coatings(TBCs)in gas turbine engines are used in expressly harsh environments;thus,assessing TBC integrity status is critical for safety and ***,traditional periodic maintenance involves visual inspections of the TBCs,requiring the gas turbine to be decommissioned and partially *** importantly,tiny defects or internal damages that easily cause coating failure cannot be *** this work,a new nondestructive evaluation(NDE)technique of TBCs based on quantum dot(QD)anion exchange is first explored *** exchanging anions between the Cl ions and the CsPbBr_(3) QDs,the degrees of salt corrosion of the TBCs are *** resultant NDE technique shows that the colour of the TBCs obviously changes from green to blue,accompanied by a large blueshift(~100 nm)of the photoluminescence(PL)peak *** addition,the relationship between the PL peak position and coating thermophysical properties indicates that the precision of this NDE technique may easily identify theμm-level of the thermal growth oxide(TGO)changes inside the TBCs.

关键词： thermal barrier coatings nondestructive evaluation CsPbBr_(3)quantum dot anion exchange thermal growth oxide

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

人脸识别技术滥用行为刑法规制的顶层设计

当代法学 2024年第2期38卷 3-15页

作者：魏汉涛中南财经政法大学刑事司法学院中南财经政法大学刑事科学研究院

合理规制人脸识别技术滥用行为,必须做好顶层设计。对待人脸识别技术应用的价值取向,理论上存在原则禁止论与合规许可论的对立。原则禁止论过分强调风险,会阻碍人脸识别技术的进步;合规许可论将前置法与刑法应当秉持的立场混同,且没有... 详细信息

合理规制人脸识别技术滥用行为,必须做好顶层设计。对待人脸识别技术应用的价值取向,理论上存在原则禁止论与合规许可论的对立。原则禁止论过分强调风险,会阻碍人脸识别技术的进步;合规许可论将前置法与刑法应当秉持的立场混同,且没有揭示刑法规制人脸识别技术滥用行为的深层法理。对待人脸识别技术滥用行为的应然态度是有所为有所不为。关于人脸识别技术滥用行为刑法规制的方向选择,理论界存在刑法规制优先论与科技创新优先论的分野。科技创新优先论与刑法规制优先论各有优劣,只有将人脸识别信息放到第一层级进行强保护,才能真正实现两种规制方式的平衡。关于刑法如何预防人脸识别技术滥用产生的风险,存在事前预防与事后打击两种模式。事后打击模式虽然有利于保障公民的自由,但不利于保障安全;事前预防模式可以实现对法益更前位的保护,但会对刑法的谦抑原则造成冲击,动摇罪责原则的基础。理性的选择是,根据不同类型人脸识别技术滥用行为的不同特质分域而治。

关键词：人脸识别技术价值取向方向选择规制模式

Cover story: Quark/gluon taggers light the way to new physics

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第2期48卷 M0001-M0001页

作者： tao han University of Pittsburgh

Quarks and gluons are elementary particles,according to Quantum-chromo Dynamics(QCD),to bound together to form the protons,neutrons and other *** to the nature of the strong force in QCD,quarks and gluons are not free particles,rather manifesting themselves in high energy collisions by a bunch of energetic hadrons,dubbed as"jets".Thus,discriminating a quark from a gluon possesses a significant challenge because of the limited information and poor understanding of the hadronic ***,it is of fundamental importance to distinguish a quark from a gluon,not only because of the need to understand the QCD to a deeper level,but also the fact that quarks and gluons may lead to different characteristics coming from electroweak interactions and new physics beyond the Standard Model(SM)of the elementary particle *** has been known as one of the most important,but challenging tasks at hadron colliders,such as the Large Hadron Collider(LHC).

关键词： quark elementary Quark

Deciphering the population structure and genetic basis of growth traits from whole-genome resequencing of the leopard coral grouper(Plectropomus leopardus)

在线全文

学校读者我要写书评

暂无评论

Zoological Research 2024年第2期45卷 329-340页

作者： Shao-Xuan Wu Qi-Fan Zeng Wen-tao han Meng-Ya Wang Hui Ding Ming-Xuan Teng Ming-Yi Wang Pei-Yu Li Xin Gao Zhen-Min Bao Bo Wang Jing-Jie Hu MOE Key Laboratory of Marine Genetics and Breeding College of Marine Life Sciences/Key Laboratory of Tropical Aquatic Germplasm of Hainan ProvinceSanya Oceanographic InstitutionOcean University of ChinaQingdaoShandong/SanyaHainan 266100/572025China Hainan Seed Industry Laboratory SanyaHainan 572025China Southern Marine Science and Engineer Guangdong Laboratory GuangzhouGuangdong 511458China

The leopard coral grouper(Plectropomus leopardus)is a species of significant economic *** artificial cultivation of *** has thrived in recent decades,the advancement of selective breeding has been hindered by the lack of comprehensive population genomic *** this study,we identified over 8.73 million single nucleotide polymorphisms(SNPs)through whole-genome resequencing of 326 individuals spanning six distinct ***,we categorized 226 individuals with high-coverage sequencing depth(≥14×)into eight clusters based on their genetic profiles and phylogenetic ***,four of these clusters exhibited pronounced genetic differentiation compared with the other *** identify potentially advantageous loci for ***,we examined genomic regions exhibiting selective sweeps by analyzing the nucleotide diversity(θπ)and fixation index(FST)in these four *** these high-coverage resequencing data,we successfully constructed the first haplotype reference panel specific to *** achievement holds promise for enabling high-quality,***,we combined low-coverage sequencing data with imputation techniques for a genome-wide association study,aiming to identify candidate SNP loci and genes associated with growth traits.A significant concentration of these genes was observed on chromosome 17,which is primarily involved in skeletal muscle and embryonic development and cell ***,our detailed investigation of growth-related SNPs across the eight clusters revealed that cluster 5 harbored the most promising candidate SNPs,showing potential for genetic selective breeding *** findings provide a robust toolkit and valuable insights into the management of germplasm resources and genome-driven breeding initiatives targeting ***.

关键词： Plectropomus leopardus Whole-genome resequencing Growth Haplotype reference panel Single nucleotide polymorphisms