|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Numerical Study of Flow and Heat Transfer Characteristics of Impingement/Effusion Cooling显示文摘Three-dimensional numerical simulation is carried out to investigate the flow and heat transfer characteristics of impingement/effusion cooling systems. The impingement/effusion holes are arranged on two parallel perforated plates respectively in a staggered manner. Every effusion hole has an inclined angle of 30° with respect to the surface. The two parallel plates are spaced three times the diameter of the effusion hole. The ratio of center-to-center spacing of adjacent holes to the diameter of the effusion hole is set to be 3.0,4.0 and 5.0 respectively. The flow field,temperature field and wall film cooling effectiveness are calculated for different blowing ratios ranging from 0.5 to 1.5. In general,the wall cooling effectiveness increases as the center-to-center spacing of adjacent holes decreases or the blowing ratio increases. | Zhang Jingzhou Xie Hao Yang Chengfeng | 2009 | Chinese Journal of Aeronautics2009，22，4： | 16 |
| 2 | Humoral immune response to circulating SARS-CoV-2 variants elicited by inactivated and RBD-subunit vaccines显示文摘SARS-CoV-2 variants could induce immune escape by mutations on the receptor-binding domain(RBD)and N-terminal domain(NTD).Here we report the humoral immune response to circulating SARS-CoV-2 variants,such as 501Y.V2(B.1.351),of the plasma and neutralizing antibodies(NAbs)elicited by CoronaVac(inactivated vaccine),ZF2001(RBD-subunit vaccine)and natural infection.Among 86 potent NAbs identified by high-throughput single-cell VDJ sequencing of peripheral blood mononuclear cells from vaccinees and convalescents,near half anti-RBD NAbs showed major neutralization reductions against the K417N/E484K/N501Y mutation combination,with E484K being the dominant cause.VH3-53/VH3-66 recurrent antibodies respond differently to RBD variants,and K417N compromises the majority of neutralizing activity through reduced polar contacts with complementarity determining regions.In contrast,the 242–244 deletion(242–244Δ)would abolish most neutralization activity of anti-NTD NAbs by interrupting the conformation of NTD antigenic supersite,indicating a much less diversity of anti-NTD NAbs than anti-RBD NAbs.Plasma of convalescents and CoronaVac vaccinees displayed comparable neutralization reductions against pseudo-and authentic 501Y.V2 variants,mainly caused by E484K/N501Y and 242–244Δ,with the effects being additive.Importantly,RBD-subunit vaccinees exhibit markedly higher tolerance to 501Y.V2 than convalescents,since the elicited anti-RBD NAbs display a high diversity and are unaffected by NTD mutations.Moreover,an extended gap between the third and second doses of ZF2001 leads to better neutralizing activity and tolerance to 501Y.V2 than the standard three-dose administration.Together,these results suggest that the deployment of RBD-vaccines,through a third-dose boost,may be ideal for combating SARS-CoV-2 variants when necessary,especially for those carrying mutations that disrupt the NTD supersite. | Yunlong Cao Ayijiang Yisimayi Yali Bai Weijin Huang Xiaofeng Li Zhiying Zhang Tianjiao Yuan Ran An Jing Wang Tianhe Xiao Shuo Du Wenping Ma Liyang Song Yongzheng Li Xiang Li Weiliang Song Jiajing Wu Shuo Liu Xuemei Li Yonghong Zhang Bin Su Xianghua Guo Yangyang Wei Chuanping Gao Nana Zhang Yifei Zhang Yang Dou Xiaoyu Xu Rui Shi Bai Lu Ronghua Jin Yingmin Ma Chengfeng Qin Youchun Wang Yingmei Feng Junyu Xiao Xiaoliang Sunney Xie | 2021 | Cell Research2021，31，7： | 12 |
| 3 | Influence of Multi-hole Arrangement on Cooling Film Development显示文摘A series of computations is conducted for many multi-hole arrangements at several blowing ratios to further investigate the evolution of the film from multi-holes. The influence of multi-hole arrangement on effusion film cooling is analyzed and a preliminary relationship evaluating the film development from developing state to developed state is brought forward. Results show that the coolant jets from front rows of multi-holes merge rapidly and the strength of the kidney vortices due to mainstream-coolant jet interaction in the downstream region are mitigated under super-long-diamond arrangement where the streamwise hole-to-hole pitch is bigger than spanwise hole-to-hole pitch. The holes array arranged in super-long-diamond mode is not only in favor of obtaining developed film layer, but also improving averaged adiabatic film cooling effectiveness. | YANG Chengfeng ZHANG Jingzhou | 2012 | Chinese Journal of Aeronautics2012，25，2： | 10 |
| 4 | Evolution of Jobs-housing Spatial Relationship in Beijing Metropolitan Area:A Job Accessibility Perspective显示文摘With the urban expansion and economic restructuring, the jobs-housing relationship has become an important issue in studies on urban spatial structure. This paper employed a job accessibility model, which is an evaluation instrument to measure the jobs-housing relationship in Beijing Metropolitan Area from a job accessibility perspective. The results indicate that the population in the central city is declining, whereas the population in the suburbs is consistently growing and forming new population centers. However, the distribution pattern of employment is still highly centralized. Job accessibility varies in different locations, but the inner-city areas(within the Third Ring road) have seen improved job accessibility over time while job accessibility in the suburbs(especially outside the Fourth Ring road) has decreased, and this has led it to become a primary area of residential and employment mismatch. At the same time, the new towns in the outer suburbs have not yet demonstrated great potential to attract more jobs. In addition we find that, to some extent, urban planning changes the jobs-housing relationship, but a polycentric urban spatial structure is not yet evident. The floating population and related housing policy also affect the jobs-housing relationship. We propose some measures to resolve the spatial mismatch as well as some future research directions. | HAN Huiran YANG Chengfeng WANG Enru SONG Jinping ZHANG Meng | 2015 | Chinese Geographical Science2015，25，3： | 9 |
| 5 | Crystalline behaviors and phase transition during the manufacture of fine denier PA6 fibers显示文摘Recently we have successfully produced fine denier PA6 fibers by using additives containing lanthanide compounds.Meanwhile,crystallization and phase transition of PA6 fibers during spinning and drawing processes were investigated.During the spinning process,β phase crystal could be obtained in as-spun PA6 fibers which were produced with relatively high melt draw ratio,while γ phase crystal predominated when the melt draw ratio was relatively low.β phase crystal,whose behaviors are similar with those of γ phase by FT-IR and XRD characterization,could be transformed to α form easily when PA6 fibers are immersed in boiling water.However,γ phase crystal of PA6 remains unchanged in boiling water.Thus,β and γ phase crystals of PA6 can be differentiated by the crystalline behaviors of PA6 fibers after treatment in boiling water.Further experiments demonstrate that the β phase can also be produced during a drawing process where a phase transformation from γ to α occurs.In other words,β phase may act as an intermediate state during the phase transformation. | ZHANG ChengFeng LIU YuHai LIU ShaoXuan LI HuiZhen HUANG Kun PAN QingHua HUA XiaoHui HAO ChaoWei MA QingFang LV ChangYou LI WeiHong YANG ZhanLan ZHAO Ying WANG DuJin LAI GuoQiao JIANG JianXiong XU YiZhuang WU JinGuang | 2009 | Science China Chemistry2009，52，11： | 4 |
| 6 | In-situ emb e dding zeolitic imidazolate framework derived Co–N–C bifunctional catalysts in carbon nanotube networks for flexible Zn–air batteries显示文摘Recently, the development of high-performance bifunctional oxygen catalysts integrated with flexible conductive scaffolds f or rechargeable metal-air batteries has attracted considerable interest, driving by fastgrowing wearable electronics. Herein, we report a flexible bifunctional oxygen catalyst thin film consisting of Co–N–C bifunctional catalysts embedding in carbon nanotube(CNT) networks. The catalyst is readily prepared by pyrolysis of cobalt-based zeolitic imidazolate frameworks(ZIF-67) that are in-situ synthesized in CNT networks. Such catalyst film demonstrates very high catalytic activities for oxygen reduction(onset potential: 0.91 V, and half-wave potential: 0.87 V vs. RHE) and oxygen evolution(10 m Acm^-2 at 1.58 V) reactions, high methanol tolerance property, and long-term stability(97% current retention). Moreover, our integrated catalyst film shows very good structure flexibility and robustness. Based on the obtained film air electrodes, flexible Zn–air batteries demonstrate low charging and discharging overpotentials(0.82 V at 1 m A cm^-1) and excellent structure stability in the bending tests. These results indicate that presently reported catalyst films are potential air electrodes for flexible metal–air batteries. | Bo Lv Sha Zeng Wei Yang Jian Qiao Chao Zhang Chengfeng Zhu Minghai Chen Jiangtao Di Qingwen Li | 2019 | Journal of Energy Chemistry2019，28，11： | 2 |
| 7 | Caffeic acid phenethyl ester (CAPE) prevents transformation of human cells by arsenite (As) and suppresses growth of As-transformed cells 显示文摘 | Chengfeng Yang Jing Wu Ronghe Zhang | 2005 | Toxicology2005，213，12： | 1 |
| 8 | The Impact of Extracellular Vesicle-Encapsulated Circulating MicroRNAs in Lung Cancer Research显示文摘 | Yu Fujita Kazuyoshi Kuwano Takahiro Ochiya Fumitaka Takeshita Chengfeng Yang | 2014 | BioMed Research International2014，，： | 1 |
| 9 | Experimental investigation on film cooling characteristics from a row of holes with ridge-shaped tabs显示文摘 | Yang Chengfeng Zhang Jingzhou | 2012 | Experimental Thermal and Fluid Science2012，37，： | 1 |
| 10 | Magnetic Field Analysis of Hybrid Excitation Brushless Claw-pole Motor with Three-dimension- al Finite Element Method 显示文摘 | Yang Chengfeng Lin Heyun Guo Jian | 2006 | Electrical Machines and Systems2006，21，6： | 1 |
| 11 | Design and analysis of a novel hybrid excitation synchronous machine with asymmetrically stagger permanent magnet 显示文摘 | YANG Chengfeng LIN Heyun GUO Jian | 2008 | IEEE Transactions on Magnetics2008，44，11： | 1 |
| 12 | MicroRNAs: Novel Players in Cancer Diagnosis and Therapies显示文摘 | Aaron L. Oom Brock A. Humphries Chengfeng Yang Yiguo Jiang | 2014 | BioMed Research International2014，，： | 1 |
| 13 | Inhibition of ebeslen on aflatoxin B1-induced hepatocarcinogenesis in Fischer 344 rats显示文摘 | YANG Chengfeng LIU Jin WASSER S | 2000 | Carcinogenesis2000，21，12： | 1 |
| 14 | Bone Marrow Transplantation Combined with Mesenchymal Stem Cells Induces Immune Tolerance without Cytotoxic Conditioning显示文摘 | Yunchuan Wang Jiaqi Liu Chengfeng Xu Wanfu Zhang Li Bai Na Li Yang Liu Yaojun Wang Yingjun Su Dahai Hu | 2011 | Journal of Surgical Research2011，，1： | 1 |
| 15 | Mobilization of cadmium by dissolved organic matter in the rhizosphere of hyperaccumulator Sedum alfredii显示文摘 | Tingqiang Li Chengfeng Liang Xuan Han Xiaoe Yang | 2013 | Chemosphere2013，，： | 1 |
| 16 | Design and a- nalysis of a novel hybrid excitation synchronous machine with a- symmetrically stagger permanent magnet 显示文摘 | YANG Chengfeng LIN Heyun GUO Jian | 2008 | IEEE Transactions on Magnetics2008，44，11： | 1 |
| 17 | Design and a- nalysis of a novel hybrid excitation synchronous machine with a- symmetrically stagger permanent magnet 显示文摘 | YANG Chengfeng LIN Heyun GUO Jian | 2008 | IEEE Transactions on Magnetics2008，44，11： | 1 |
| 18 | Design and analysis of a novel hybrid excitation synchronous machine with asymmetricallystagger permanent magnet显示文摘 | Yang Chengfeng Lin Heyun Guo Jiane t al | 2008 | IEEE Transactions on Magnetics2008，44，11： | 1 |
| 19 | Design and Analysis of a Novel Hybrid Excitation Synchronous Machine with Asymmetrically Stagger Permanent Magnet 显示文摘 | Chengfeng Yang Heyun Lin Jian Guo | 2008 | IEEE Transactions on Magnetics2008，44，11： | 1 |
| 20 | Diffusion- based clock synchronization for molecular communication under inverse gaussian distribution 显示文摘 | Lin Lin Yang Chengfeng Ma Maode | 2015 | IEEE Sensors Journal2015，15，9： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员