维普中文期刊产品整合服务
26篇 您的检索式:作者名="Junchen Liu"
    题名 作者 年代 出处 被引量
1Magnetic yolk-shell structured anatase-based microspheres loaded with Au nanoparticles for heterogeneous catalysis显示文摘磁性的蛋黄壳组织了基于锐钛矿的 microspheres 在磁铁矿粒子上通过连续、灵巧的大音阶的第五音胶化涂层被制作,由退火列在后面处理。在与金 nanoparticles 装载之上,获得的功能的磁性的 microspheres 在向苯乙烯氧化物与非凡的高变换(89.5%) 和选择(90.8%) 催化苯乙烯的 epoxidation 作为异构的催化剂显示出优异性能。这些迷人的材料的构造过程为创造另外的功能的 nanocomposites 展示许多含意,这被相信。Chun Wang Junchen Chen Xinran Zhou Wei Li Yong Liu Qin Yue Zhaoteng Xue Yuhui Li Ahmed A. Elzatahry Yonghui Deng Dongyuan Zhao 2015Nano Research2015,8,1:7
2Large-scale blow spinning of heat-resistant nanofibrous air filters显示文摘Particulate matter(PM)pollution has become a serious problem worldwide and various kinds of nanofibrous filters aiming to solve the problem have been developed.It is urgent to remove PM from high-temperature pollution sources,such as industrial emissions,coal furnaces,and automobile exhaust gases.However,filtration at pollution sources remains challenging because most existing air filters are not resistant to high temperature.Herein,heat-resistant polyimide(PI)nanofibrous air filters are fabricated via a simple and scalable solution blow-spinning method.These air filters show excellent thermal stability at high temperature up to 420℃.They exhibit a filtration efficiency as high as 99.73%at ambient temperature and over 97%at 300℃.In addition,a field test shows that the filters remove>97%of PM from the car exhaust fumes.Hence,the blow-spun PI nanofibrous membranes combined with the facile preparation strategy have great potential in high temperature air filtration fields and other similar applications such as water purification and protein separation.Ziwei Li Jianan Song Yuanzheng Long Chao Jia Zhenglian Liu Lei Li Cheng Yang Junchen Liu Sen Lin Haiyang Wang Yibo Liu Minghao Fang Hui Wu 2020Nano Research2020,13,3:6
3Low-Carbon and Nanosheathed ZnCo_(2)O_(4) Spheroids with Porous Architecture for Boosted Lithium Storage Properties显示文摘Multielectronic reaction electrode materials for high energy density lithium-ion batteries(LIBs)are severely hindered by their inherent sluggish kinetics and large volume variations,leading to rapid capacity fade.Here,a simple method is developed to construct low-carbon and nanosheathed ZnCo_(2)O_(4) porous spheroids(ZCO@C-5).In this micro/nanostructure,an ultrathin amorphous carbon layer(∼2 nm in thickness)is distributed all over the primary nanosized ZCO particles(∼20 nm in diameter),which fnally self-assembles into porous core(ZCO)-shell(carbon)micron spheroids.Te nanoencapsulation and macro/mesoporous architecture can not only provide facile electrolyte penetration and rapid ion/electron transfer but also better alleviate volumetric expansion efect to avoid pulverization of ZCO@C-5 spheroids during repeat charge/discharge processes.As expected,the three-dimensional porous ZCO@C-5 composites exhibit high reversible capacity of 1240 mAh g^(−1) cycle at 500 mA g^(−1),as well as excellent long-term cycling stability and rate capability.Te low-carbon and nanoencapsulation strategy in this study is simple and efective,exhibiting great potential for high-performance LIBs.Yudi Mo Junchen Liu Shuanjin Wang Min Xiao Shan Ren Dongmei Han Yuezhong Meng 2019Research2019,,1:3
4The Current Situation and Planning Strategy of Police Station Facilities in Megacities Under the Background of New Urbanization:A Case Study of Changping District in Beijing显示文摘In the process of new urbanization,the population of megacities is increasing rapidly,the scale of cities is expanding,and the supply of service facilities has been unable to meet the demand.As an important carrier of urban governance and urban management,the police station should properly deal with the existing problems in the urban police stations,and improve the quality of life of residents by optimizing urban service facilities,which is of great significance for the implementation of people-oriented new urbanization.Taking Changping District of Beijing as an example,this study pointed out that there were many problems in police stations in Changping District.For example,the area of land is not up to the standard,the service capacity is not up to the demand,and the facilities are not up to the demand.Then,three planning strategies:adjusting the planning standards of facilities,optimizing the spatial layout of facilities,and strengthening the later guarantee of facilities were put forward,so as to improve people’s satisfaction with life,promote the high-quality development of new urbanization,and provide reference for the supplement of service facilities in megacities.LI Daoyong LIU Junchen LIU Mengge 2020Journal of Landscape Research2020,12,3:2
5Sonication-triggered instantaneous gel-to-gel transformation显示文摘YU Xudong LIU Qian WU Junchen 2010Chemistry Europe2010,16,30:1
6OSMRβmutants enhance basal keratinocyte differentiation via inactivation of the STAT5/KLF7 axis in PLCA patients显示文摘Dear Editor,Primary localized cutaneous amyloidosis(PLCA)is a skinlimited disorder characterized by deposition of amyloid material in the superficial dermis.According to clinical characteristics,PLCA is divided into lichen,macular,and nodular amyloidosis.PLCA is found worldwide but has a higher incidence in South America and Southeast Asia,such as in Brazil and China(Chang et al.,2014;Tey et al.,2016).Jun Liu Junchen ChenYadan Zhong Xiaoling Yu Ping Lu Jianqi Feng Xin Zhang Shufeng Ma Chao Yang Bin Yang Zhili Rong 2021Protein & Cell2021,12,8:1
7Operational Modal Analysis of a Ship Model in the Presence of Harmonic Excitation显示文摘一艘轮船在极其复杂的环境下面被操作,并且波浪和风被假定是随机的刺激。而且,推进器,主人和机械设备能也导致泛音回答。以便减少结构的颤动,获得一艘轮船的形式的参数信息是重要的。然而,自从刺激信息是困难的获得,传统的形式的参数鉴定方法不是合适的。自然刺激 technique-eigensystem 实现算法(下时代) 是仅仅从反应信号提炼形式的参数的一个运作的形式的鉴定方法,并且它基于到结构的输入是纯白噪音的假设。因此,当把下时代方法用于轮船结构时,学习泛音刺激的影响是必要的。这篇研究论文的结果在周围的刺激下面显示实际经验,仅仅当泛音频率不离形式的频率太靠近时,轮船模型实验成功地在形式的参数鉴定被做。Junchen Xu Ming Hong Xiaobing Liu 2013Journal of Marine Science and Application2013,12,1:1
8A composite inhibitor used in oilfield: MA-AMPS and imidazoline显示文摘Ting Gu Pengcheng Su Xiaoyan Liu Junchen Zou Xinying Zhang Yan Hu 2013Journal of Petroleum Science and Engineering2013,,:1
9Ten-Hour Stable Noninvasive Brain-Computer Interface Realized by Semidry Hydrogel-Based Electrodes显示文摘Noninvasive brain computer interface(BCI)has been extensively studied from many aspects in the past decade.In order to broaden the practical applications of BCI technique,it is essential to develop electrodes for electroencephalogram(EEG)collection with advanced characteristics such as high conductivity,long term efectiveness,and biocompatibility.In this study,we devcloped a silver-nanowire/PVA hydrogc/mclamine sponge(AgPHMS)semidry EEG electrode for long lasting monitoring of EEG signal.Benefiting from the water storage capacity of PVA hydrogel,the clectrolyte solution can be continuously released to the scalpelctrode interface during used.The electrolyte solution can infiltrate the stratum corneum and reduce the scalp-electrode impedance to 10k0-15k0.The flexible structure enabls the electrode with mechanical stability,increases the wearing comfort,and reduces the scalp-electrode gap to reduce contact impedance.As a result,a long-term BCI application based on measurements of motion-onset visual evoked potentials(mVEPs)shows that the 3-hour BCI accuracy of the new electrode(77%to 100%)is approximately the same as that of conventional eletrodes supported by a conductive gel during the first hour.Furthermore,the BCI system based on the new electrode can retain low contact impedance for 10 hours on scalp,which greatly improved the ability of BCI technique.Junchen Liu Sen Lin Wenzheng Li Yanzhen Zhao Dingkun Liu Zhaofeng He Dong Wang Ming Lei Bo Hong Hui Wu 2022Research2022,,2:1
10Pomelo peel modified with acetic anhydride and styrene as new sorbents for removal of oil pollution显示文摘Wenbo Chai Xiaoyan Liu Junchen Zou Xinying Zhang Beibei Li Tiantian Yin 2015Carbohydrate Polymers2015,,:1
11A large-area AgNW-modified textile with high-performance electromagnetic interference shielding显示文摘Manufacturing a flexible,light,large-area,and high-efficiency electromagnetic shielding materials in a straightforward and cost-effective manner presently remains a significant challenge.In this work,we propose a conductive network design and verify its electromagnetic interference(EMI)shielding effectiveness(SE)by simulation.Using the structure and parameters obtained by simulation,we prepare a flexible EMI shielding material using silver nanowires(AgNWs)/polyvinyl butyral(PVB)ethanol solution and textile substructure via a facile immersing method.In the frequency range of 5-18 GHz,the AgNWs/PVB textile with 1.4 mm thickness achieves an EMI SE of 59 dB,which exceeds the requirements for commercial applications.Due to the low density of 56 mg/cm^(3),specific shielding effectiveness(SSE)of this material reaches 1053 dB m^(3)/g.It is found that the AgNWs/PVB textile is more resistant to washing with water and oxidation than AgNWs textile without a PVB protector.As a result,the conductivity of AgNWs/PVB textile exhibits no change after washing with water and varies slightly after being kept in hot air.We find that a signal monitor is unable to detect a signal emitted by a mobile phone from a jacket lined with AgNWs/PVB textile.AgNWs/PVB textile with these properties can be mass-produced as high-efficiency EMI shielding material for commercial applications.Junchen Liu Sen Lin Kai Huang Chao Jia Qingmin Wang Ziwei Li Jianan Song Zhenglian Liu Haiyang Wang Ming Lei Hui Wu 2020npj Flexible Electronics2020,4,1:0
12Dengue virus infection:A review of advances in the emerging rapid detection methods显示文摘Dengue virus infections are increasing worldwide generally and in Asia,Central and South America and Africa,particularly.It poses a serious threat to the children population.The rapid and accurate diagnostic systems are essentially required due to lack of effective vaccine against dengue virus and the progressive spread of the dengue virus infection.The recent progress in developing micro-and nano-fabrication techniques has led to low cost and scale down the biomedical point-of-care devices.Starting from the conventional and modern available methods for the diagnosis of dengue infection,this review examines several emerging rapid and point-of-care diagnostic devices that hold significant potential for the progress in smart diagnosis tools.The given review revealed that an effective vaccine is required urgently against all the dengue virus serotypes.However,the rapid detection methods of dengue virus help in early treatment and significantly reduce the dengue virus outbreak.MUBASHIR HUSSAIN ZEESHAN ALI BIN LIU JIANGUO DAI XIAOLONG LIU JUNCHEN ZHU YONGJUN TANG 2022BIOCELL2022,46,1:0
13Relationship of Microchannels and Plaque Erosion in Patients with ST-Segment Elevation Myocardial Infarction: An Optical Coherence Tomography Study显示文摘Objective:Microchannels are associated with the progression of atherosclerotic vulnerable plaques.However,in patients with culprit optical coherence tomography(OCT)-defined plaque erosion,the knowledge of microchannels and culprit lesion vulnerability is limited.The aim of this study was to investigate culprit lesion characteristics in patients with ST-segment elevated myocardial infarction(STEMI)caused by plaque erosion with and without microchannels using OCT.Methods:In all,348 STEMI patients with plaque erosion who underwent OCT of the culprit lesion at the 2nd Affiliated Hospital of Harbin Medical University(Harbin,China)from August 2014 to December 2017 were included and divided into the microchannel group(n=116,33.3%)and no-microchannel group(n=232,66.7%).The clinical characteristics and OCT-derived plaque features were compared between both groups.Results:Among the 348 STEMI patients with plaque erosion,culprit lesions with microchannels had higher incidence of lipid plaque(59.5%vs.45.3%,P=0.012);calcification(41.4%vs.24.6%,P=0.002);spotty calcification(30.2%vs.18.1%,P=0.014);macrophages accumulation(72.4%vs.45.7%,P<0.001);and cholesterol crystals(32.8%vs.14.2%,P<0.001)than those without microchannels.In addition,minimal lumen area was smaller((1.9±0.9)mm2 vs.(2.8±2.3)mm2,P<0.001)and lumen area stenosis was greater((71.3%±13.4%)vs.(65.3%±19.3%),P=0.001)in the microchannel group than in the no-microchannel group.Conclusion:In patients with STEMI caused by plaque erosion,one-third manifested typical microchannel characteristics,and those with microchannels were associated with more severe luminal stenosis and more vulnerable plaque features than those without microchannels.Senqing Jiang Junchen Guo Yanwei Yin Chao Fang Jifei Wang Yidan Wang Fangmeng Lei Sibo Sun Xueying Pei Ruyi Jia Shaotao Zhang Lulu Li Yini Wang Lei Xing Huai Yu Huimin Liu Maoen Xu Xuefeng Ren Lijia Ma Guo Wei Jingbo Hou Jiannan Dai Bo Yu 2022Cardiology Discovery2022,2,2:0
14Investigating the ENSO prediction skills of the Beijing Climate Center climate prediction system version 2显示文摘The El Niño-Southern Oscillation(ENSO)ensemble prediction skills of the Beijing Climate Center(BCC)climate prediction system version 2(BCC-CPS2)are examined for the period from 1991 to 2018.The upper-limit ENSO predictability of this system is quantified by measuring its“potential”predictability using information-based metrics,whereas the actual prediction skill is evaluated using deterministic and probabilistic skill measures.Results show that:(1)In general,the current operational BCC model achieves an effective 10-month lead predictability for ENSO.Moreover,prediction skills are up to 10–11 months for the warm and cold ENSO phases,while the normal phase has a prediction skill of just 6 months.(2)Similar to previous results of the intermediate coupled models,the relative entropy(RE)with a dominating ENSO signal component can more effectively quantify correlation-based prediction skills compared to the predictive information(PI)and the predictive power(PP).(3)An evaluation of the signal-dependent feature of the prediction skill scores suggests the relationship between the“Spring predictability barrier(SPB)”of ENSO prediction and the weak ENSO signal phase during boreal spring and early summer.Yanjie Cheng Youmin Tang Tongwen Wu Xiaoge Xin Xiangwen Liu Jianglong Li Xiaoyun Liang Qiaoping Li Junchen Yao Jinghui Yan 2022Acta Oceanologica Sinica2022,41,5:0
15A new member of Sphenopsida,Neolobatannularia gen. nov. from Late Triassic of western Liaoning,China显示文摘A new genus Neolobatannularia Sun et Li gen. nov. with the type species Neolobatannularia liaoningensis Sun et Li sp. nov. from the Upper Triassic Yangcaogou Formation of Beipiao, Liaoning, China, is described in this paper. The new taxon is attributed to Equisetales of Sphenopsida based on its branch with internodes, node and leaves borne in whorls on nodes. It is a new member of the Mesozoic Sphenopsida. Although the new taxon shares some morphological characters with the genus Lobatannularia Kawasaki, a genus widely distributed in the Permian Cathaysia flora in East Asia, and the genus Lobatannulariopsis Yang from the Late Triassic of southwestern China, its unique branching pattern is markedly distinguished from the two known genera. Some Triassic known species of Lobatannularia may belong to the present new genus Neolobatannularia.WANG Junyou LI Tao LIU Zhiping GUO Bin KANG Ai NA Yuling LI Yunfeng WANG Hongshan BO Junchen SUN Chunlin 2019Global Geology2019,22,1:0
16Incorporating metal nanoparticles in porous materials via selective heating effect using microwave显示文摘Metal nanoparticle@porous material composites have attracted increasing attention due to their excellent synergistic catalytic performance.However,it is a challenge to introduce metal nanoparticles into cavities of porous materials without agglomeration on the exterior.Despite the progress achieved,a universal approach that can integrate different kinds of metal nanoparticles and porous materials is still highly desirable.Here we report a facile and general approach to fabricating metal nanoparticle@porous materials by microwave-triggered selective heating.The microwave can pass through the non-polar solvent and act on the polar solvent in the porous materials,causing the polar solvent to be heated,vaporized,and away from the pores of porous materials.The local void produced by the escape of polar solvent facilitates non-polar solvent containing metallic precursor to be dragged into the narrow pores,followed by further reduction,resulting in the complete encapsulation of nanoparticles.A series of metal nanoparticles@porous materials,ranging from metal-organic frameworks(MOFs)to zeolites,are successfully prepared by this method and show excellent size selectivity in catalytic reactions.Yingyu Zhou Jiacheng Liu Fuyuan Sun Junchen Ouyang Ruifa Su Fanchen Meng Yongqi Luo Cheng Xu Weina Zhang Suoying Zhang Fengwei Huo 2024Nano Research2024,17,4:0
17Purification and characterization of a salt-tolerant cellulase from the mangrove oyster, Crassostrea rivularis显示文摘有 pH 抵抗和高盐忍耐的宽范围的绗维素酶在红树属植物森林里从牡蛎 Crassostrea rivularis 生活的消化的腺被孤立。作为 CrCel 说出的 27 kDa 绗维素酶被净化由从在非减少的钠 dodecylsufate-polyacrylamide 胶化电气泳动以后的胶化的阴离子交换层析和抽取的 40.6 褶层。净化的绗维素酶的特定的活动是对 carboxymethyl 纤维素 CMC 的 23.4 U/mg。CrCel 的 N 终端氨基酸顺序决心是 NQKCQANSRV。CrCel 最好水解 -1,4-glucosidic 向木聚糖在纤维素材料和显示降级活动的非结晶的部分结合。K m 和 V 为 CMC 的 CrCel 的最大 价值决心是 2.1% 汵瑡潩 ? 景 ? 剄′獵湩 ? 浳污 ? 湩整晲牥湩 ? 乒 ? 楳乒 ? 灡牰慯档 ? 潢桴漠 ? 桴?散汬洠杩慲潴祲愠摮椠癮獡癩?桰湥瑯灹獥眠牥?楳湧晩捩湡汴?瑡整畮瑡摥眠敨?潣灭牡摥眠瑩?桴?潣瑮潲?Tianchen An Zhu Dong Junchen Lv Yujun Liu Manchuriga Wang ShuangshuangWei Yanting Song Yingxia Zhang Shiming Deng 2015Acta Biochimica et Biophysica Sinica2015,47,4:0
18Concentrated ternary ether electrolyte allows for stable cycling of a lithium metal battery with commercial mass loading high-nickel NMC and thin anodes显示文摘A new concentrated ternary salt ether-based electrolyte enables stable cycling of lithium metal battery(LMB)cells with high-mass-loading(13.8 mg cm^(−2),2.5 mAh cm^(−2))NMC622(LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2))cathodes and 50μm Li anodes.Termed“CETHER-3,”this electrolyte is based on LiTFSI,LiDFOB,and LiBF4 with 5 vol%fluorinated ethylene carbonate in 1,2-dimethoxyethane.Commer-cial carbonate and state-of-the-art binary salt ether electrolytes were also tested as baselines.With CETHER-3,the electrochemical performance of the full-cell battery is among the most favorably reported in terms of high-voltage cycling stability.For example,LiNi_(x)Mn_(y)Co_(1-x-y)O_(2)(NMC)-Li metal cells retain 80%capacity at 430 cycles with a 4.4 V cut-off and 83%capacity at 100 cycles with a 4.5 V cut-off(charge at C/5,discharge at C/2).According to simulation by density functional theory and molecular dynamics,this favorable performance is an outcome of enhanced coordination between Li^(+)and the solvent/salt molecules.Combining advanced microscopy(high-resolution transmission electron microscopy,scanning electron microscopy)and surface science(X-ray photoelectron spectroscopy,time-of-fight secondary ion mass spectroscopy,Fourier-transform infrared spectroscopy,Raman spectroscopy),it is demonstrated that a thinner and more stable cathode electrolyte interphase(CEI)and solid electrolyte interphase(SEI)are formed.The CEI is rich in lithium sulfide(Li_(2)SO_(3)),while the SEI is rich in Li_(3)N and LiF.During cycling,the CEI/SEI suppresses both the deleterious transformation of the cathode R-3m layered near-surface structure into disordered rock salt and the growth of lithium metal dendrites.Jun Yang Xing Li Ke Qu Yixian Wang Kangqi Shen Changhuan Jiang Bo Yu Pan Luo Zhuangzhi Li Mingyang Chen Bingshu Guo Mingshan Wang Junchen Chen Zhiyuan Ma Yun Huang Zhenzhong Yang Pengcheng Liu Rong Huang Xiaodi Ren David Mitlin 2023Carbon Energy2023,5,3:0
19Purification and characterization of a trypsin inhibitor from the seeds of Artocarpus heterophyllus Lam显示文摘对胰岛素的一个 proteinaceous 禁止者从 Artocarpus heterophyllus 的种子被孤立打。由连续的铵硫酸盐降水,离子交换,和胶化过滤层析。胰岛素禁止者,作为 AHLTI 说出(一。heterophyllus 打。胰岛素禁止者) ,与 28.5 kDa 的分子的重量由单个多肽链组成了,它被钠 dodecyl sulfatepolyacrylamide 胶化电气泳动和胶化过滤层析证实。AHLTI 的 N 终端顺序是 DEPPSELDAS,它没显示出类似到另外的已知的胰岛素禁止者顺序。AHLTI 完全在本国的 polyacrylamide 胶化电气泳动,抑制活动试金,和胶化过滤层析分析的 1:2 (AHLTI:trypsin ) 的臼齿的比率禁止了牛的胰岛素。而且,运动酶的研究被执行对胰岛素理解 AHLTI 的抑制机制。结果证明 AHLTI 是有一个平衡分离常数的一个竞争禁止者(K 3.7 的 i ) 吗??Junchen Lyu Yuan Liu Tianchen An Yujun Liu Manchuriga Wang Yanting Song Feifei Zheng Dan Wu Yingxia Zhang Shiming Deng 2015Acta Biochimica et Biophysica Sinica2015,47,5:0
20An ultralight,flexible,and biocompatible all-fiber motion sensor for artificial intelligence wearable electronics显示文摘New-generation human body motion sensors for wearable electronics and intelligent medicine are required to comply with stringent requirements in terms of ultralight weight,flexibility,stability,biocompatibility,and extreme precision.However,conventional sensors are hard to fulfill all these criteria due to their rigid structure,high-density sensing materials used as the constituents,as well as hermetical and compact assembly strategy.Here,we report an ultralight sensing material based on radial anisotropic porous silver fiber(RAPSF),which has been manufactured by phase separation and temperature-controlled grain growth strategy on a modified blow-spinning system.The resistance of RAPSF could be dynamically adjusted depending on the deflected shape.Furthermore,an all-fiber motion sensor(AFMS)with an ultra-low density of 68.70 mg cm^(−3) and an overall weigh of 7.95 mg was fabricated via layer-by-layer assembly.The sensor exhibited outstanding flexibility,breathability,biocompatibility,and remarkable body motion recognition ability.Moreover,the AFMS was shown to have great potential as an artificial intelligence throat sensor for throat state identification at the accuracy above 85%,allowing one to spot the early onset of the viral throat illness.Sen Lin Shuang Hu Wei Song Miaoqing Gu Junchen Liu Jianan Song Zhenglian Liu Ziwei Li Kun Huang Yufeng Wu Ming Lei Hui Wu 2022npj Flexible Electronics2022,6,1:0
返回顶部 每页显示:
共2页 首页 上一页 第1页 下一页 末页 /2 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费