检索结果-南通市图书馆

Zoological Research 2020年第4期41卷 423-430页

作者： Zhong-Yuan Shen Dan Yu xin Gao fu-Tie zhang Huan-zhang Liu The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences Institute of HydrobiologyChinese Academy of SciencesWuhanHubei 430072China University of Chinese Academy of Sciences Beijing 100049China

The Chinese sturgeon(Acipenser sinensis Gray,1835)is a large anadromous fish species,which is under considerable threat due to dramatic declines in population *** the current study,population genetic diversity and individual reproductive success were assessed using nuclear microsatellite markers(simple sequence repeat,SSR)and complete mitochondrial(mt DNA)genome analysis of juveniles born in *** showed the existence of size polymorphism in the mt DNA genome of Chinese sturgeon,which was caused by a repeat *** genetic diversity was high based on both SSR(Ho:0.728±0.211;He:0.779±0.122)and mt DNA genome analyses(H:0.876±0.0035;Pi:0.0011±0.0010).A positive inbreeding coefficient(FIS:0.066±0.143)was also found,indicating the occurrence of *** of sibling groups identified 11 mothers and 11 fathers involved in reproduction of Chinese sturgeons in *** in individual reproductive success was not significant,with reproductive success of parent fish instead shown to be relatively even(P=0.997>0.05),thus suggesting the absence of sweepstakes reproductive success(SRS).These results indicate that,in regard to conservation,loss of genetic diversity due to the effects of SRS is not of particular ***,we must focus on having an adequate number of adults and suitable environmental conditions to ensure that fish can reproduce.

关键词： instead absence Yangtze

The preface: Toward higher-Tc superconductivity under lower pressure——from binary to ternary superhydrides

在线全文

学校读者我要写书评

暂无评论

National Science Review 2024年第7期11卷 7-8页

作者： fu-Chun zhang Ho-kwang Mao xin-Cheng Xie Kavli Institute for Theoretical Sciences University of Chinese Academy of Sciences Shanghai Advanced Research in Physical Sciences Center for High Pressure Science and Technology Advanced Research International Center for Quantum Materials School of Physics Peking University

Superconductivity——the phenomenon of complete vanishing of electrical resistance and expulsion of magnetic field——is the paramount electromagnetic property for technological advancement that is only shackled by th...

关键词：

Analysis of the effect of repeated-pulse transcranial magnetic stimulation at the Guangming point on electroencephalograms

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2014年第5期9卷 549-554页

作者： xin zhang Lingdi fu Yuehua Geng Xiang Zhai Yanhua Liu Tianjin Polytechnic University Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology Department of Otorhinolaryngology Tianjin Huanhu Hospital Hebei College of Industry and Technology

Here, we administered repeated-pulse transcranial magnetic stimulation to healthy people at the left Guangming （GB37） and a mock point, and calculated the sample entropy of electroencephalo- gram signals using nonlinear dynamics. Additionally, we compared electroencephalogram sample entropy of signals in response to visual stimulation before, during, and after repeated-pulse tran- scranial magnetic stimulation at the Guangming. Results showed that electroencephalogram sample entropy at left （F3） and right （FP2） frontal electrodes were significantly different depending on where the magnetic stimulation was administered. Additionally, compared with the mock point, electroencephalogram sample entropy was higher after stimulating the Guangming point. When visual stimulation at Guangming was given before repeated-pulse transcranial magnetic stimula- tion, significant differences in sample entropy were found at five electrodes （C3, Cz, C4, P3, T8） in parietal cortex, the central gyrus, and the right temporal region compared with when it was given after repeated-pulse transcranial magnetic stimulation, indicating that repeated-pulse transcranial magnetic stimulation at Guangming can affect visual function. Analysis of electroencephalogram revealed that when visual stimulation preceded repeated pulse transcranial magnetic stimulation, sample entropy values were higher at the C3, C4, and P3 electrodes and lower at the Cz and T8 electrodes than visual stimulation followed preceded repeated pulse transcranial magnetic stimula- tion. The findings indicate that repeated-pulse transcranial magnetic stimulation at the Guangming evokes different patterns of electroencephalogram signals than repeated-pulse transcranial mag- netic stimulation at other nearby points on the body surface, and that repeated-pulse transcranial magnetic stimulation at the Guangrning is associated with changes in the complexity of visually evoked electroencephalogram signals in parietal regions, central gyr

关键词： nerve regeneration brain injury acupuncture magnetic stimulation acupuncture poi- nt mock point Guangming point brain function electroencephalogram signals complexity sample entropy nonlinear dynamics NSFC grant neural regeneration

Crystallization behavior in severely cold-drawn Ti_(50) Ni_(47) Fe_3 wire

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2014年第3期33卷 258-262页

作者： xin-Quan zhang Hui-Fang Geng fu-Shun Liu Wen Ma The Integrated Standard and Material Application Research Department AVIC The First Aircraft Institute School of Materials Science and Engineering Beijing University of Aeronautics and Astronautics Division of Science and Technology Information General Research Institute for Nonferrous Metals

The microstructures and crystallization behavior of Ti-47 at% Ni-3 at% Fe shape memory alloy wire under the condition of severe cold drawing at room temperature and different post-deformation annealing processes were intensively investigated using transmission electron microscope（TEM） and differential scanning calorimetry（DSC）. It is indicated that the amorphous phase is dominant in the Ti50Ni47Fe3 wire after the cold drawing of 78 % areal reduction. The critical temperature for recrystalization is determined at about 300 °C. The average grain size grows from 7 up to 125 nm when annealing temperature rises from300 to 500 °C. Post-deformation annealing process exerts significant influence on the crystallization temperature which climbs up with the increase of annealing temperature.

关键词： TisoNi47Fe3 wire Cold drawing Annealing Amorphous Crystallization

Preparation and characterization of agar, agarose,and agaropectin from the red alga Ahnfeltia plicata

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3期37卷 815-824页

作者： zhang Yu fu Xiaoting DUAN Delin XU Jiachao GAO xin College of Food Science and Engineering Ocean University of ChinaQingdao 266003China Key Laboratory of Experimental Marine Biology Institute of OceanologyChinese Academy of SciencesQingdao 266071China State Key Lab of Seaweed Bioactive Substances Qingdao 266400China

Agar,agarose,and agaropectin were extracted from the red alga Ahnfeltia plicata,and their properties and structures were *** was extracted by a comparatively low alkaline consumption of 1.2%.It exhibited a gel strength of 1 152.50±74.25 g/cm^2 and a sulfate content of 0.55%±0.08%.The yield of agar from *** was 24.53%,which is higher than those of other agarophytes commonly used in *** kinds of the method were compared for the purification of agarose,and the physicochemical properties of agarose that was prepared under the optimal condition were identical to those of commercially available ***,agaropectin was purified from *** and characterized by GC,HPLC,UV-spectrum,and FI-IR to understand its composition and *** was the first time to comprehensively study the agar and its fractions from the red alga of *** research provided an eco-friendly agar extraction method from *** and revealed its potential application for the production of agar,agarose,and agaropectin.

关键词： Ahnfeltia plicata agar agarose agaropectin

ComR:a combined OWL reasoner for ontology classification

在线全文

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2019年第1期13卷 139-156页

作者： Changlong WANG Zhiyong FENG Xiaowang zhang xin WANG Guozheng RAO Daoxun fu School of Computer Science and Technology Tianjin UniversityTianjin 300072China Tianjin Key Laboratory of Cognitive Computing and Application Tianjin 300072China School of Computer Science and Engineering Northwest Normal UniversityLanzhou 730070China

Ontology classification,the problem of computing the subsumption hierarchies for classes (atomic concepts),is a core reasoning service provided by Web Ontology Language (OWL)*** general-purpose OWL 2 reasoners employ sophisticated optimizations for classification,they are still not efficient owing to the high complexity of tableau algorithms for expressive ontologies. Profile-specific OWL 2 EL reasoners are efficient;however, they become incomplete even if the ontology contains only a small number of axioms that are outside the OWL 2 EL *** this paper,we present a technique that combines an OWL 2 EL reasoner with an OWL 2 reasoner for ontology classification of expressive *** optimize the workload,we propose a task decomposition strategy for identifying the minimal non-EL subontology that contains only necessary axioms to ensure *** the ontology classification,the bulk of the workload is delegated to an efficient OWL 2 EL reasoner and only the minimal non- EL subontology is handled by a less efficient OWL 2 *** proposed approach is implemented in a prototype ComR and experimental results show that our approach offers a substantial speedup in ontology *** the wellknown ontology NCI,the classification time is reduced by 96.9%(resp.83.7%)compared against the standard reasoner Pellet (*** modular reasoner MORe).

关键词： OWL ontology classification reasoner

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

充血性心力衰竭病人血凝指标检测的意义

心血管康复医学杂志 2002年第2期11卷 118-120页

作者：赵金晶傅鑫张湘兰沈阳医学院附属二院心内科辽宁沈阳市110002

目的 :观察充血性心力衰竭 (CHF)病人各项血凝指标的变化 ,探讨其临床意义。方法 :用酶联免疫吸附双抗体夹心法测定 47例 CHF病人及 2 0例正常人血浆 Von Willebrand因子 (v WF)、血小板 α-颗粒膜蛋白 (GMP-140 )、血浆 D-二聚体 (D- D... 详细信息

目的 :观察充血性心力衰竭 (CHF)病人各项血凝指标的变化 ,探讨其临床意义。方法 :用酶联免疫吸附双抗体夹心法测定 47例 CHF病人及 2 0例正常人血浆 Von Willebrand因子 (v WF)、血小板 α-颗粒膜蛋白 (GMP-140 )、血浆 D-二聚体 (D- Dimer)水平。结果 :CHF病人体内上述指标与对照组比较有显著差异 (P<0 .0 5 ) ,并随心力衰竭加重而增加 ,伴房颤病人上述指标变化更显著。结论 :充血性心力衰竭病人 ,特别是心衰严重 ,伴有房颤的病人的血液处于高凝状态。

关键词：充血性心力衰竭血小板α-颗粒膜蛋白血浆Von Willerand因子血浆D-二受体酶联免疫吸附双抗体夹心法 CHF

8周运动预适应增强脂肪干细胞治疗心肌梗死大鼠的效果

在线全文

学校读者我要写书评

暂无评论

中国组织工程研究 2025年第7期29卷 1363-1370页

作者：娄国张敏付常喜江苏经贸职业技术学院江苏省南京市211168 南京旅游职业学院江苏省南京市211100 徐州工程学院体育学院江苏省徐州市221008

背景:干细胞移植是心肌梗死的崭新疗法,然而梗死区域极其恶劣的微环境造成干细胞存活率低下并导致远期疗效甚微。运动预适应是一种通过运动诱导机体产生内源性保护效应的方式,可作为心脏康复预防与治疗的新策略。目的:评估运动预适应是... 详细信息

背景:干细胞移植是心肌梗死的崭新疗法,然而梗死区域极其恶劣的微环境造成干细胞存活率低下并导致远期疗效甚微。运动预适应是一种通过运动诱导机体产生内源性保护效应的方式,可作为心脏康复预防与治疗的新策略。目的:评估运动预适应是否能够增强大鼠心肌梗死后脂肪干细胞移植的心脏保护效应,探讨血管生成在其中的作用机制。方法:6周龄雄性SD大鼠随机分为对照组、造模组、干细胞组以及干细胞运动组。利用冠状动脉闭塞术制作急性心肌梗死模型,对照组同期行假手术;干细胞运动组于造模前进行8周有氧运动,造模后30 min进行脂肪干细胞移植;干细胞组仅进行脂肪干细胞移植。干细胞移植后1 d和7 d,利用免疫印迹法测定心肌总Akt(t-Akt)、磷酸化Akt(p-Akt)、血管内皮生长因子(VEGF)、总内皮型一氧化氮合酶(t-eNOS)和磷酸化内皮型一氧化氮合酶(p-eNOS)蛋白表达量,计算p-Akt/t-Akt和p-eNOS/t-eNOS比值;4周后利用彩色多普勒超声诊断系统检测心脏结构与功能以及心肌血流量,TTC染色法检测心肌梗死面积,Masson染色法检测心肌间质胶原沉积,免疫荧光染色法测定心肌毛细血管密度,TUNEL染色法评估心肌细胞凋亡。结果与结论:(1)干细胞移植后4周:与对照组比较,造模组左心室缩短分数、左心室射血分数、心肌毛细血管密度和心肌血流量下降(P0.05);与造模组比较,干细胞组上述指标均无显著性变化(P>0.05),干细胞运动组磷酸化p-Akt蛋白表达量以及p-Akt/t-Akt比值上调(P0.05),干细胞运动组p-Akt、VEGF、p-eNOS蛋白表达量以及p-Akt/t-Akt、p-eNOS/t-eNOS比值升高(P<0.05)。结果表明:运动预适应可增强脂肪干细胞对心肌梗死大鼠心脏重塑的治疗效果,其机制与促进心肌血管生成并增加血流灌注有关。

关键词：干细胞脂肪干细胞运动预适应心肌梗死血管生成心脏重塑血流灌注

Application of Te-Based Glass in Silicon Solar Cells

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2015年第2期28卷 223-229页

作者： xin-xin Pi Xiu-Hua Cao Zhen-Xiao fu Le zhang Peng-De Han Li-Xi Wang Qi-Tu zhang College of Materials Science and Engineering Nanjing University of Technology Guangdong Fenghua Advanced Technology Company Limited

（90-x）TeO2-xZnO-lOBi203 （x = 15, 17.5, 20 and 22.5, in mol%） and 70TeOz-2OZnO-（10-y）Bi2O3-y Na2O （y = 1, 3, 5, 7, and 10, in mol%） glasses, and the corresponding Ag paste were prepared in order to prove that the Te-based glass frit could be applied to Ag pastes to fabricate Ag electrode. The relationship between structure and properties of the glasses was analyzed. The effects of glass frit on the microstructure, adhesion force, and resistivity of the Ag electrode were studied. The microstructure of Ag electrodes and the phase analysis of interface between Ag electrodes and the Si wafer were investigated using SEM and XRD. Finally, the 70TeO2-20ZnO-5Bi2O3-5Na2O glass showed better performance in the paste. What is more, Ag crystallites could be found on the Si wafer. These results suggested that the Te-based glass frit could react with SiNx anti-reflecting coating and Si to serve as a medium for forming Ag crystallites.

关键词： Solar cells Ag electrode Silver paste Tellurite glass Ag crystallites

Contribution of nearly-zero energy buildings standards enforcement to achieve carbon neutral in urban area by 2060

在线全文

学校读者我要写书评

暂无评论

Advances in Climate Change Research 2021年第5期12卷 734-743页

作者： zhang Shi-Cong YANG xin-Yan XU Wei fu Yi-Jun China Academy of Building Research Beijing100013China International Science and Technology Cooperation Base for Nearly-Zero Energy Buildings Ministry of Science and TechnologyBeijing100013China Jianke EET Co.Ltd. Beijing100013China

Nearly-zero energy buildings (NZEB) would effectively improve building energy efficiency and promote building electrification. By using a carbon emission model integrated into a bottom-up mid-to-long term energy consumption model, this study analyzes the contribution of NZEB standards to carbon emission targets in the urban area of China by 2060. Three scenarios are set, namely BAU, steady development (S1), and high-speed development (S2). For BAU, the total carbon emissions will reach a peak of 1.94 Gt CO_(2) by 2040. In S1 scenario, total building carbon emissions will reach the peak of 1.72 Gt CO_(2) by 2030. In S2 scenario, the carbon emissions will reach a peak by 2025 with 1.64 Gt CO_(2). Under S1 scenario, which features consistency with NZEB market development and periodic improvement of building energy-efficiency standards, the carbon emission peak in 2030 will be accomplished. To achieve carbon neutrality by 2060, the upgrading of building energy standards to NZEB will contribute 50.1%, while zero-carbon electricity contribution is 49.9%. It is concluded that 2025, 2030, and 2035 could be set as mandatory enforcement years for ultra-low energy buildings, NZEB and zero energy building (ZEB), respectively.

关键词： Ultra-low energy buildings Nearly-zero energy buildings Zero energy buildings Building energy consumption Building carbon emission