检索结果-南通市图书馆

Optimization on magnetic properties of Nd-doped Fe_(3)O_(4) nanoparticles for magnetic shielding fabrics

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第4期42卷 683-689页

作者： xiaolei song Congzhu Xu Yuyan Wang Huizhen Ke Yonggui Li Qufu Wei Xinqun Feng Faculty of Clothing and Design Minjiang UniversityFuzhou350108China Fujian Key Laboratory of Novel Functional Textile Fibers and Materials Minjiang UniversityFuzhou350108China College of Textile and Clothing Jiangnan UniversityWuxi214122China College of Fashion and Design Donghua UniversityShanghai201620China

High magnetic protective fabrics with rare earth Nd doped Fe_(3)O_(4) nanoparticles were fabricated via a grafting *** structure,crystal form,and elemental composition of nanoparticles were investigated by transmission electron microscopy,energy dispersive X-ray,X-ray powder diffraction,and X-ray photoelectron *** obtained NdFe_(2)O_(4) nanoparticles show spherical shape with fine dispersion and reasonable element ***,they demonstrate fine superparamagnetic properties with a magnetic saturation value of 29.25 A·m^(2)/g and low coercivity of 1.902 mT through the vibrating sample magnetometry technique,which can be well developed in magnetic shielding protective ***,the cotton fabrics with plain weave were finished by a proofing rapier loom as a *** NdFe_(2)O_(4) nanoparticles underwent some appropriate surface modification and then were grafted onto the cotton fabrics by a bridge agent of N,N’-dissuccinimidyl *** morphology,structure,dispersion effect,and electromagnetic protective properties of the fabrics were observed through scanning electron microscopy,Fourier infrared spectroscopy,thermogravimetric analysisdifferential scanning calorimetry(TG-DSC),and a vector network *** reliable fabrics with grafting reaction on the interface are expected to have potential applications in the field of electromagnetic protection and biomedicine fields.

关键词： Magnetic property Nd Fe_(3)O_(4)nanoparticles Magnetic shielding Fabrics Rare earths

Combination of High Yield Strength and Improved Ductility of 21Cr Lean Duplex Stainless Steel by Tailoring Cold Deformation and Low-Temperature Short-Term Aging

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2024年第4期37卷 695-702页

作者： Zhenghong Liu Zhigang Wu Ying Han xiaolei song Guoqing Zu Weiwei Zhu Xu Ran Key Laboratory of Advanced Structural Materials Ministry of EducationChangchun University of TechnologyChangchun130012China School of Materials Science and Engineering Changchun University of TechnologyChangchun130012China Jilin Province Key Laboratory of Advanced Materials Processing and Application for Rail Transit Changchun University of TechnologyChangchun130012China

Proper matching of cold-rolled deformation and low-temperature short-term aging can simultaneously enhance the strength and ductility of the lean duplex stainless steel. To investigate this, the microstructure evolution of cold-rolled and aging steels was observed by using scanning electron microscopy, transmission electron microscopy and electron backscattered diffraction. Additionally, the phase volume fraction was measured using X-ray diffraction. In this study, it was observed that the elongation of 21Cr lean duplex stainless steel significantly increased to 16.7% after undergoing moderate cold deformation (~ 40% reduction) and subsequent aging treatment at 550 ℃ for 30 min. Remarkably, the material still maintained a high yield strength of 1045 MPa. Such an excellent mechanical property was attributed to a unique microstructure combination of fine α'-martensite, twins, coarsened austenite resulting from partial martensite reverse transformation, and two-phase fine layered structure. The result of this study may open up new horizons for the alloy development in order to overcome the low ductility of cold-rolled high-strength lean duplex stainless steel.

关键词： Lean duplex stainless steel Cold rolling Aging Microstructure Mechanical properties Use our pre-submission checklist

Mate choice for major histocompatibility complex(MHC)complementarity in the Yellow-rumped Flycatcher(Ficedula zanthopygia)

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

Avian Research 2021年第2期12卷 218-226页

作者： Mingju E xiaolei song Liufang Wang Yimo Yang Xianxiu Wei Jiangping Yu Ye Gong Haitao Wang School of Life Sciences Changchun Normal UniversityChangchun 130032China Jilin Engineering Laboratory for Avian Ecology and Conservation Genetics School of Life SciencesNortheast Normal UniversityChangchun 130024China Shenyang No.37 High School Shenyang 110000China Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization School of Life SciencesNortheast Normal UniversityChangchun 130024China Ministry of Education Key Laboratory of Vegetation Ecology School of Life SciencesNortheast Normal UniversityChangchun 130024China

Background:Genes of the major histocompatibility complex(MHC)are an important component of the vertebrate immune system and play a significant role in mate choice in animal ***,the MHC genetic targets of female mate choice have not been clearly identified,and whether female mate choice is based on neutral genetic characteristics remains an open ***,we focus on the effects of morphological traits and genetic similarity among individuals in MHC class IIB(MHC IIB)exon 2 on mating in a sexually dimorphic songbird that exhibits social monogamy with extra-pair paternity(EPP).Methods:We sequenced 64 parent-offspring triads sampled over a 3-year period using two MHC class II loci to detect disassortative mating in the Yellow-rumped Flycatcher(Ficedula zanthopygia).Results:We found that MHC similarity in social pairs was lower than that in random ***-pair mate choice according to MHC IIB was observed,in which females’extra-pair mates had fewer MHC alleles than their within-pair mates,but there was no significant band-sharing between extra-pair sires and potential extra-pair ***,the interaction between the MHC diversity of females and that of the social males affected the occurrence of ***:Our results support the“optimality hypothesis”of MHC-based social and extra-pair *** choice probably maintains a certain level of MHC diversity in offspring in the Yellow-rumped Flycatcher.

关键词： Extra-pair paternity Mate choice Optimality hypothesis Yellow-rumped Flycatcher

Password-Based Group Key Agreement Protocol for Client-Server Application

在线全文

学校读者我要写书评

暂无评论

Wuhan University Journal of Natural Sciences 2006年第6期11卷 1701-1703页

作者： LU Rongxing CAO Zhenfu DONG xiaolei song Chao SUN Congkai School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China

The security issue is always the most important concern of networked client-server application. On the putpose to build the secure group communication among of a group of client users and one server, in this paper, we will present a new password-based group key agreement protocol. Our protocol will meet simplicity, efficiency, and many desired security properties.

关键词： security password-based group key agreement client-server application

A robust statistical prediction model for late-summer heavy precipitation days in North China

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2024年

作者： Shunli JIANG Tingting HAN Xin ZHOU Huijun WANG ZhiCong YIN xiaolei song Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster Ministry of Education Nanjing University for Information Science and Technology Nansen-Zhu International Research Centre Institute of Atmospheric Physics Chinese Academy of Sciences Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)

Recently, heavy precipitation(HP) events have occurred frequently in North China(NC), causing devastating economic losses and human fatalities. However, the short-term climate prediction of HP is quite limited. Combining year-to-year increment(DY) method and sliding correlations, we developed a robust seasonal prediction model for late-summer HP days(HPDs) in NC during 1982–2022, utilizing three independent predictors—February sea surface temperature(SST) in the Indian Ocean(SST＿IO), February snow depth over North Asia(SDE＿NA), and May melted snow depth in NC(MSDE＿NC). The SST＿IO anomalies affect NC's precipitation through the Pacific-Japan pattern. The SDE＿NA anomalies are associated with East Asian anomalous anticyclone by southeastern propagation of Rossby wave at Eurasia. The MSDE＿NC anomalies are followed by vertical motion and moisture anomalies in situ and thereby cause precipitation anomalies. This prediction model can well simulate the variations of the HPDs, with a correlation coefficient(CC) of 0.81(0.65) between the observed and predicted HPDs＿DY(HPDs＿anomaly). The percentage with the same sign for 15 extreme HPDs＿anomaly years(PSSE) is 100%.Moreover, in the cross-validation test during 1982–2022, the PSSE for HPDs＿anomaly is as high as 100%, along with a low rootmean-square error of 1.14. For independent hindcasts during 2013–2022, the CC between the observed and predicted HPDs＿DY(HPDs＿anomaly) is 0.93(0.83), together with high Nash-Sutcliffe efficiency(0.82) and agreement index(0.89). Specifically, the predictions are broadly consistent with the observations for 2015, 2016, 2017, 2021, and 2022, reflecting excellent performance of this prediction model of HPDs in NC.

关键词：

Homeobox Gene Six3 is Required for the Differentiation of D2-Type Medium Spiny Neurons

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neuroscience Bulletin 2021年第7期37卷 985-998页

作者： xiaolei song Haotian Chen Zicong Shang Heng Du Zhenmeiyu Li Yan Wen Guoping Liu Dashi Qi Yan You Zhengang Yang Zhuangzhi Zhang Zhejun Xu Institute of Pediatrics Children’s Hospital of Fudan UniversityState Key Laboratory of Medical Neurobiology and Ministry of Education Frontiers Center for Brain ScienceInstitutes of Brain ScienceFudan UniversityShanghai 200032China

Medium spiny neurons(MSNs)in the striatum,which can be divided into D1 and D2 MSNs,originate from the lateral ganglionic eminence(LGE).Previously,we reported that Six3 is a downstream target of Sp8/Sp9 in the transcriptional regulatory cascade of D2 MSN development and that conditionally knocking out Six3 leads to a severe loss of D2 ***,we showed that Six3 mainly functions in D2 MSN precursor cells and gradually loses its function as D2 MSNs *** deletion of Six3 had little effect on cell proliferation but blocked the differentiation of D2 MSN precursor *** addition,conditional overexpression of Six3 promoted the differentiation of precursor cells in the *** measured an increase of apoptosis in the postnatal striatum of conditional Six3-knockout *** suggests that,in the absence of Six3,abnormally differentiated D2 MSNs are eliminated by programmed cell *** results further identify Six3 as an important regulatory element during D2 MSN differentiation.

关键词： Six3 LGE Drd2 striatum Medium spiny neuron

Effect of catgut implantation at acupoints on GABA_B and mGluR1 expressions in brain stem of rats with spasticity after stroke

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

Journal of Traditional Chinese Medicine 2014年第5期34卷 566-571页

作者： Chengmei Liu Ruiqing Li xiaolei song Xiaodong Feng Rehabilitation Center of the First Affiliated Hospital of Henan University of Traditional Chinese Medicine

OBJECTIVE: To investigate the effect of catgut implantation at acupoints on the expressions of γ-amino butyric acid B receptor(GABAB ) and metabotropic glutamate receptor 1(mGluR1) in the brain stem of rats with spasticity after ***: In total, 60 male Sprague-Dawley rats were randomly divided into three groups: a sham group(n=10), a model group(n=25) and a treatment group(n=25). The rats in both the model group and the treatment group were subjected to middle cerebral artery occlusion to establish a model of focal cerebral ischemia. Rats with limb-spasm met the inclusion criteria. Only the left carotid artery was isolated in sham group rats. Three days after modeling, the treatment group was subjected to catgut implantation at Dazhui(GV 14), Guanyuan(CV 4), and Zhongwan(CV 12). Neurological deficit symptoms were assessed with the Zea-Longa neurological deficit score. The Modified Ashworth Scale(MAS), and isolated muscle tone were used to evaluate spasticity before and after treatment. Immunohistochemistry was applied to determine the expression of GABAB and mGluR1 in the rat brain stem after ***: After treatment, neural impairment symptoms had significantly improved in the treatment group when compared to the model group(P<0.05). Both MAS and isolated muscle tone in the treatment group were significantly decreased when compared with the model group(P<0.05),and were also lower than before treatment. GABAB expression was significantly higher and mGluR1 was lower in the treatment group when compared with the model group(P<0.01 and P<0.05, respectively).CONCLUSION: Catgut implantation at Dazhui(GV 14), Guanyuan(CV 4), and Zhongwan(CV 12), can relieve limb spasticity by increasing the expression of GABAB and reducing the expression of mGluR1 in the brain stem of rats after stroke.

关键词： Stroke Muscle spasticity Embeddingtherapy Point GV 14 (Dazhui) Point CV 4 (Guanyu-an), Point CV 12 (Zhongwan), Metabotropic gluta-mate receptor type 1

基于客体的空间一致性效应：功能可见性或空间位置编码？

在线全文

学校读者我要写书评

暂无评论

心理科学 2015年第5期38卷 1067-1073页

作者：宋晓蕾陕西师范大学心理学院、陕西省行为与认知神经科学重点实验室西安710062

采用空间Simon任务范式,考察基于客体空间一致性效应到底是手柄的功能可见性引起,还是其空间位置编码导致。实验1采用Pellicano等(2010)研究中的带手柄电筒,要求被试完成与抓握功能相关的形状判断任务,结果表明,唯有当电筒开时,被试产... 详细信息

采用空间Simon任务范式,考察基于客体空间一致性效应到底是手柄的功能可见性引起,还是其空间位置编码导致。实验1采用Pellicano等(2010)研究中的带手柄电筒,要求被试完成与抓握功能相关的形状判断任务,结果表明,唯有当电筒开时,被试产生了基于客体的空间一致性效应。实验2去除电筒可抓握的手柄,发现无论电筒开或关,均出现了更大的基于客体空间一致性效应。上述结果与空间编码假说一致,表明空间位置编码是产生基于客体空间一致性效应的原因。

关键词：抓握功能可见性 Simon效应空间编码空间一致性

在线全文

学校读者我要写书评

暂无评论

基于扰动算法的组织光学断层图像重建

清华大学学报（自然科学版） 2007年第12期47卷 2196-2199页

作者：奉华成白净宋小磊清华大学生物医学工程系北京100084

为了克服扰动算法初始值选择的局限性,提出了定性重建组织的吸收系数图像的预定标技术。根据由初始猜测值求出的边界上的正问题的解与实际边界测量值的比例关系,对吸收系数的初始值进行修正,使之达到一个合适的值之后再用于求逆运算,并... 详细信息

为了克服扰动算法初始值选择的局限性,提出了定性重建组织的吸收系数图像的预定标技术。根据由初始猜测值求出的边界上的正问题的解与实际边界测量值的比例关系,对吸收系数的初始值进行修正,使之达到一个合适的值之后再用于求逆运算,并在迭代过程中保持漫射系数的值不变。仿真实验中对组织吸收系数图像在采用和不采用预定标技术的情况下分别进行重建。结果表明,在初始值偏离真实解较远时,只有采用预定标技术才能得到预期结果。可见,预定标技术是对传统扰动算法的一种有效的改进。

关键词：组织光学漫射光学断层扰动算法图像重建