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11篇 您的检索式:作者名="Zichuan Liu"
    题名 作者 年代 出处 被引量
1Successful generation of cloned mice using nuclear transfer from induced pluripotent stem cells显示文摘Shuya Zhou Chenhui Ding Xiaoyang Zhao Eryao Wang Xiangpeng Dai Lei Liu Wei Li Zichuan Liu Haifeng Wan Chunjing Feng Tang Hai Liu Wang Qi Zhou 2010Cell Research2010,20,7:10
2Low-noise 1.3 μm InAs/GaAs quantum dot laser monolithically grown on silicon显示文摘We report low-noise, high-performance single transverse mode 1.3 μm InAs/GaAs quantum dot lasers monolithically grown on silicon(Si) using molecular beam epitaxy. The fabricated narrow-ridge-waveguide Fabry–Perot(FP) lasers have achieved a room-temperature continuous-wave(CW) threshold current of 12.5 mA and high CW temperature tolerance up to 90°C. An ultra-low relative intensity noise of less than-150 dB∕Hz is measured in the 4–16 GHz range. Using this low-noise Si-based laser, we then demonstrate 25.6 Gb/s data transmission over13.5 km SMF-28. These low-cost FP laser devices are promising candidates to provide cost-effective solutions for use in uncooled Si photonics transmitters in inter/hyper data centers and metropolitan data links.MENGYA LIAO SIMING CHEN ZHIXIN LIU YI WANG LALITHA PONNAMPALAM ZICHUAN ZHOU JIANG WU MINGCHU TANG SAMUEL SHUTTS ZIZHUO LIU PETER M.SMOWTON SIYUAN YU ALWYN SEEDS HUIYUN LIU 2018Photonics Research2018,,11:7
3Removal of bromate ion using powdered activated carbon显示文摘Bromate ion (BrO 3) removal from drinking water by powdered activated carbons (PAC S) in bath mode was evaluated under various operational conditions.Six kinds of PACs,including wood-based carbon,fruit-based carbon,coal-based carbon,and these three carbons thermally deoxidized in a nitrogen atmosphere,were selected to investigate their capacity on BrO 3 removal.With the highest zeta potential value and being richly mesoporous,coal-based carbon had a high and an excellent BrO 3 adsorption efficiency.The removal content of BrO 3 by per gram of coal-based carbon was 0.45 mg within 5 hr in 100 μg/L bromate solution.The surface characteristics of PACs and bromide formation revealed that both physical and chemical PACs properties simultaneously affected the adsorptionreduction process.Under acidic conditions,PAC S possessed high zeta value and adequate basic groups and exhibited neutral or positive charges,promoting BrO 3 adsorption-reduction on the carbon surface.Interestingly,the PAC S thermally deoxidized in N 2 atmosphere optimized their properties,e.g.increasing their zeta values and decreasing the oxygen content which accelerated the BrO 3 removal rate.The maximum adsorption capacity of fruit-based carbon was the highest among all tested carbons (99.6 mg/g),possibly due to its highest pore volume.Remarkably,the thermal regeneration of PACs in N 2 atmosphere could completely recover the adsorption capacity of PACs.The kinetic data obtained from carbons was analyzed using pseudo second-order and intraparticle diffusion models,with results showing that the intraparticle diffusion was the more applicable model to describe adsorption of BrO 3 onto PACs.Lian Wang Jie Zhang Jingze Liu Hong He Min Yang Jianwei Yu Zichuan Ma Feng Jiang 2010Journal of Environmental Sciences2010,22,12:3
4Ecological stoichiometry of nitrogen, phosphorous, and sulfur in China's forests显示文摘Much attention has been paid to the stoichiometry of carbon(C), nitrogen(N), and phosphorus(P) because of their significance for plant growth and climate change. However, other nutrients, such as sulfur(S), are often ignored. In this study, we analyzed the stoichiometry of N, P, and S in leaves of 348 plant species in China's forests. The results show higher N content and higher molar ratios of N/P and P/S in Angiospermae than in Gymnospermae. At the family level, Ulmaceae absorbed more N and P from soils than other families, and Cupressaceae absorbed more S than other families. In addition,except for bamboo and other tropical forests, leaf N and P content of China's forests generally increased from low to middle latitudes and then slightly decreased or plateaued at high latitudes. Plant ecotypes, taxonomic groups, environmental conditions, atmospheric S precipitation, and soil-available N and P significantly affected the distribution and stoichiometry of leaf N, P, and S in China's forests.Our study indicates that China's forests are likely limited by P and S deficiencies which may increase in the future.Yuntao Wu Hongyan Liu Zhaoliang Song Xiaomin Yang Zichuan Li Qian Hao Linan Liu 2017Acta Geochimica2017,36,3:2
5Effects of slope position and land use on the stability of aggregateassociated organic carbon in calcareous soils显示文摘Topography and land use affect soil organic carbon(SOC) storage, stabilization, and turnover, through several biogeochemical processes. This study investigated the aggregate composition and SOC content of bulk soils and aggregates at different slope positions under different land uses in a typical karst catchment of southwestern China. Our results show that the proportion of macro-aggregates and the SOC content of bulk soils and aggregates at different slope positions decreased from the upper to the lower slope. The SOC content generally increased with an increase in the mean weight diameter and proportion of macro-aggregates under different land uses. Our results indicate that macro-aggregates in forest and grassland soils make a greater contribution to both aggregate composition and SOC content than that in arable land soils. Therefore,converting farmland to forest or grassland can facilitate the accumulation of macro-aggregates as well as the storage of SOC.Man Liu Guilin Han Zichuan Li Taoze Liu Xiaomin Yang Yuntao Wu Zhaoliang Song 2017Acta Geochimica2017,36,3:2
6Establishment of customized mouse stem cell lines by sequential nuclear transfer显示文摘治疗学的克隆,胚胎的干细胞(转换字符) 由此从原子转移(NT ) 被导出胚胎,可以在再生药的新时代起一个主要作用。Inthis 学习我们建立了四十原子转移 -- 从不同施主房间类型或段落的 NTembryos 被导出的转换字符(NT 转换字符) 线。我们发现 NT 转换字符能够形成胚胎植物或动物身体。另外, NT 转换字符表示了 pluripotency 干细胞标记试管内并且能区分进胚胎的纸巾体内。从施主房间能形成完整的术语的早经过 R1 的 NT 胚胎开发了小狗,而那些为为实时出生是必要的 reprogramming 从迟了的经过 R1 ES 施主房间失去了潜力。我们随后建立了近来从 NT 胚囊被开发的 sequentialNT-R1-ESC 线经过 R1 转换字符施主。然而,当在他们的早段落用作原子转移施主时,这些 NT-R1-ESC 排队,没能导致实时小狗。这显示用顺序的 NT 转换字符的治疗学的克隆过程不能救居住在以前的施主代的发展缺乏。Chunli Zhao Ruqiang Yao Jie Hao Chenhui Ding Yong Fan Xiangpeng Dai Wei Li Tang Hai Zichuan Liu Yang Yu Yingying Wang Xiaojun Hou Weizhi Ji Qi Zhou Alice Jouneau Fanyi Zeng Liu Wang 2007Cell Research2007,17,1:1
7Effect of alkali metalpromoters on natural manganese ore catalysts for the com-plete catalytic oxidation of o-xylene 显示文摘Wu Yinsu Liu Min Ma Zichuan 2011Catalysis Today2011,175,1:1
8Complete catalytic oxidation of o -xylene over Mn–Ce oxides prepared using a redox-precipitation method显示文摘Yinsu Wu Yuxia Zhang Min Liu Zichuan Ma 2010Catalysis Today2010,,3:1
9Quantum dot mode-locked frequency comb with ultra-stable 25.5 GHz spacing between 20℃ and 120℃显示文摘Semiconductor mode-locked lasers(MLLs)are promising frequency comb sources for dense wavelength-divisionmultiplexing(DWDM)data communications.Practical data communication requires a frequency-stable comb source in a temperature-varying environment and a minimum tone spacing of 25 GHz to support high-speed DWDM transmissions.To the best of our knowledge,however,to date,there have been no demonstrations of comb sources that simultaneously offer a high repetition rate and stable mode spacing over an ultrawide temperature range.Here,we report a frequency comb source based on a quantum dot(QD)MLL that generates a frequency comb with stable mode spacing over an ultrabroad temperature range of 20–120℃.The two-section passively mode-locked In As QD MLL comb source produces an ultra-stable fundamental repetition rate of 25.5 GHz(corresponding to a 25.5 GHz spacing between adjacent tones in the frequency domain)with a variation of 0.07 GHz in the tone spacing over the tested temperature range.By keeping the saturable absorber reversely biased at-2 V,stable mode-locking over the whole temperature range can be achieved by tuning the current of the gain section only,providing easy control of the device.At an elevated temperature of 100℃,the device shows a 6 d B comb bandwidth of 4.81 nm and 31 tones with>36 d B optical signal-to-noise ratio.The corresponding relative intensity noise,averaged between 0.5 GHz and 10 GHz,is-146 d Bc∕Hz.Our results show the viability of the In As QD MLLs as ultra-stable,uncooled frequency comb sources for low-cost,large-bandwidth,and low-energy-consumption optical data communications.SHUJIE PAN JIANOU HUANG ZICHUAN ZHOU ZHIXIN LIU LALITHA PONNAMPALAMZIZHUO LIU MINGCHU TANG MU-CHIEH LO ZIZHENG CAO KENICHI NISHI KEIZO TAKEMASA MITSURU SUGAWARA RICHARD PENTY IAN WHITE ALWYN SEEDS HUIYUN LIU SIMING CHEN 2020Photonics Research2020,8,12:0
10Targeting FGFR in non-small cell lung cancer:implications from the landscape of clinically actionable aberrations of FGFR kinases显示文摘Objective:Dysfunction in fibroblast growth factor receptor(FGFR)signaling has been reported in diverse cancer types,including non-small cell lung cancer(NSCLC).The frequency of FGFR aberrations in Chinese NSCLC patients is therefore of great clinical significance.Methods:A total of 10,966 NSCLC patients whose tumor specimen and/or circulating cell-free DNA(cf DNA)underwent hybridization capture-based next-generation sequencing were reviewed.Patients'clinical characteristics and treatment histories were also evaluated.Results:FGFR aberrations,including mutations,fusions,and gene amplifications,were detected in 1.9%(210/10,966)of the population.FGFR abnormalities were more frequently observed in lung squamous cell carcinomas(6.8%,65/954)than lung adenocarcinomas(1.3%,128/9,596).FGFR oncogenic mutations were identified in 19 patients(~0.17%),of which,68%were male lung squamous cell carcinoma patients.Eleven out of the 19 patients(58%)had concurrent altered PI3 K signaling,thus highlighting a potential combination therapeutic strategy of dual-targeting FGFR and PI3 K signaling in such patients.Furthermore,FGFR fusions retaining the intact kinase domain were identified in 12 patients(0.11%),including 9 FGFR3-TACC3,1 FGFR2-INA,1 novel FGFR4-RAPGEFL1,and 1 novel fusion between the FGFR1 and SLC20 A25′-untranslated regions,which may have caused FGFR1 overexpressions.Concomitant EGFR mutations or amplifications were observed in 6 patients,and 4 patients received anti-EGFR inhibitors,in whom FGFR fusions may have mediated resistance to anti-EGFR therapies.FGFR amplification was detected in 24 patients,with the majority being FGFR1 amplifications.Importantly,FGFR oncogenic mutations,fusions,and gene amplifications were almost always mutually exclusive events.Conclusions:We report the prevalence of FGFR anomalies in a large NSCLC population,including mutations,gene amplifications,and novel FGFR fusions.Zhen Zhou Zichuan Liu Qiuxiang Ou Xue Wu Xiaonan Wang Yang Shao Hongyan Liu Yu Yang 2021Cancer Biology & Medicine2021,18,2:0
11A Survey on the Evolution of Bootkits Attack and Defense Techniques显示文摘According to the boot process of modern computer systems,whoever boots first will gain control first.Taking advantage of this feature,a malicious code called bootkit can hijack the control before the OS bootloader and bypass security mechanisms in boot process.That makes bootkits difficult to detect or clean up thoroughly.With the improvement of security mechanisms and the emergence of UEFI,the attack and defense techniques for bootkits have constantly been evolving.We first introduce two boot modes of modern computer systems and present an attack model of bootkits by some sophistical samples.Then we discuss some classic attack techniques used by bootkits from their initial appearance to the present on two axes,including boot mode axis and attack phase axis.Next,we evaluate the race to the bottom of the system and the evolution process between bootkits and security mechanisms.At last,we present the possible future direction for bootkits in the context of continuous improvement of OS and firmware security mechanisms.Yilin Zhou Guojun Peng Zichuan Li Side Liu 2024China Communications2024,21,1:0
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