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| 1 | A Strigolactone Biosynthesis Gene Contributed to the Green Revolution in Rice显示文摘Plant architecture is a complex agronomic trait and a major factor of crop yield,which is affected by several important hormones.Strigolactones(SLs)are identified as a new class hormoneinhibiting branching in many plant species and have been shown to be involved in various developmental processes.Genetical and chemical modulation of the SL pathway is recognized as a promising approach to modify plant architecture.However,whether and how the genes involved in the SL pathway could be utilized in breeding still remain elusive.Here,we demonstrate that a partial loss-of-function allele of the SL biosynthesis gene,HIGH TILLERING AND DWARF 1/DWARF17(HTD1/D17),which encodes CAROTENOID CLEAVAGE DIOXYGENASE 7(CCD7),increases tiller number and improves grain yield in rice.We found that the HTD1 gene had been widely utilized and co-selected with Semidwarf 1(SD1),both contributing to the improvement of plant architecture in modern rice varieties since the Green Revolution in the 1960s.Understanding how phytohormone pathway genes regulate plant architecture and how they have been utilized and selected in breeding will lay the foundation for developing the rational approaches toward improving crop yield. | Yuexing Wang Lianguang Shang Hong Yu Longjun Zeng Jiang Hu Shen Ni Yuchun Rao Sanfeng Li Jinfang Chu Xiangbing Meng Lei Wang Ping Hu Jijun Yan Shujing Kang Minghao Qu Hai Lin Tao Wang Quan Wang Xingming Hu Hongqi Chen Bing Wang Zhenyu Gao Longbiao Guo Dali Zeng Xudong Zhu Guosheng Xiong Jiayang Li Qian Qian | 2020 | Molecular Plant2020，13，6： | 23 |
| 2 | Three-Dimensional Multi-mesh Material Point Method for Solving Collision Problems显示文摘为三维的材料点方法的一个新多网孔接触算法被介绍。接触算法忠实地恢复在碰撞身体之间的相反的代理力量。在常规身体或僵硬身体之间的碰撞过程在一样的框架以内被对待。动量和团的多值在每个节点上被定义描述接触 / 幻灯片 / 分离过程。在接触表面的每个粒子的正常、正切的速度在各自的单个网孔被计算。库仑磨擦被使用描述在联系身体之间滑动或滑倒。接触算法的效率是线性地与联系身体的数字有关因为当节的动量和团被形成在时,重叠节点被打扫所有身体的材料粒子标记每次走。数字模拟证明我们的接触算法拥有高精确性和低数字精力驱散,它为解决碰撞问题是很重要的。 | PAN Xiao-Fei XU Ai-Guo ZHANG Guang-Cai ZHANG Ping ZHU Jian-Shi MA Shang ZHANG Xiong | 2008 | Communications in Theoretical Physics2008，49，5： | 10 |
| 3 | Local and Global Existence of Solutions to Initial Value Problems of Modified Nonlinear Kawahara Equations显示文摘这篇论文被奉献给学习修改非线性的 Kawahara 方程(部分 deriv u )的起始的价值问题/(部分 deriv t )+α (( u^2 部分 deriv u )/( partialderiv x ))+β (((部分 deriv )~ 3 u )/(部分 deriv x^3 ))+γ (((部分 deriv )~ 5 u )/( partialderiv x^5 ))= 0 ,( x , t )∈ R^2 。我们首先为相应线性问题的基本答案建立几 Strichartz 类型估计。然后,我们使用如此的估计证明修改 nonlinearKarahara 方程的起始的值问题的解决方案的存在本地、全球。如果有 s ≥ 1/4 的起始的功能 U_0 (x)∈ H ~ s (R) ,和一个全球答案存在,如果,结果证明一个本地答案存在 s ≥ 2。 | Shuang Ping TAO Shang Bin CUI | 2005 | Acta Mathematica Sinica,English Series2005，21，5： | 10 |
| 4 | Global Existence of Solutions for the Cauchy Problem of the Kawahara Equation with L^2 Initial Data显示文摘在这份报纸,我们与 L 2 起始的数据学习 Kawahara 方程的 Cauchy 问题的解决之可能性。由研究 Bourgain 空间 X r, s (R 2 ) 与这个方程联系了,如果,我们证明 Kawahara 方程的 Cauchy 问题是局部地可解决的起始的数据属于 H r (R) 并且 ? 1 < r 鈮 ? 0。如果,这结果与全球答案存在的 Kawahara 方程收益的精力能量守恒定律结合了起始的数据属于 L 2 (R) 。关键词 Kawahara 方程 - Cauchy 问题 - 全球答案先生(2000 ) 题目分类 35Q53 - 中国自然科学基础支持的 35Q35 工程(同意 10171111, 10171112 ) | Shang Bin CUI Dong Gao DENG Shuang Ping TAO | 2006 | Acta Mathematica Sinica,English Series2006，22，5： | 9 |
| 5 | Molecular network-based intervention brings us closer to ending the HIV pandemic显示文摘Precise identification of HIV transmission among populations is a key step in public health responses.However,the HIV transmission network is usually difficult to determine.HIV molecular networks can be determined by phylogenetic approach,genetic distance-based approach,and a combination of both approaches.These approaches are increasingly used to identify transmission networks among populations,reconstruct the history of HIV spread,monitor the dynamics of HIV transmission,guide targeted intervention on key subpopulations,and assess the effects of interventions.Simulation and retrospective studies have demonstrated that these molecular network-based interventions are more cost-effective than random or traditional interventions.However,we still need to address several challenges to improve the practice of molecular network-guided targeting interventions to finally end the HIV epidemic.The data remain limited or difficult to obtain,and more automatic real-time tools are required.In addition,molecular and social networks must be combined,and technical parameters and ethnic issues warrant further studies. | Xiaoxu Han Bin Zhao Minghui An Ping Zhong Hong Shang | 2020 | Frontiers of Medicine2020，14，2： | 7 |
| 6 | Synergism of irbesartan and amlodipine on hemodynamic amelioration and organ protection in spontaneously hypertensive rats显示文摘瞄准: 调查协同血压可变性(BPV ) 的减小上的 amlodipine 和 irbesartan 低剂量, baroreflex 敏感(BRS ) 的改善和在自发地高血压的老鼠(SHR ) 的机关保护。 | Wen SHANG Ping HAN Cheng-bing YANG Xiao-wen GU Wei ZHANG Li-ping XU Shou-ting FU Ding-fengSU He-hui XIE | 2011 | Acta Pharmacologica Sinica2011，32，9： | 7 |
| 7 | Functional analysis of a miRNA‐like small RNA derived from Bombyx mori cytoplasmic polyhedrosis virus显示文摘Bombyx mori cytoplasmic polyhedrosis virus(BmCPV)is a major pathogen of the economic insect silkworm,Bombyx mori.Virus‐encoded microRNAs(miRNAs)have been proven to play important roles in host–pathogen interactions.In this study we identified a BmCPV‐derived miRNA‐like 21 nt small RNA,BmCPV‐miR‐1,from the small RNA deep sequencing of BmCPV‐infected silkworm larvae by stem‐loop quantitative real‐time PCR(qPCR)and investigated its functions with qPCR and lentiviral expression systems.Bombyx mori inhibitor of apoptosis protein(BmIAP)gene was predicted by both target prediction software miRanda and Targetscan to be one of its target genes with a binding site for BmCPV‐miR‐1 at the 5′untranslated region.It was found that the expression of BmCPV‐miR‐1 and its target gene BmIAP were both up‐regulated in BmCPV‐infected larvae.At the same time,it was confirmed that BmCPV‐miR‐1 could up‐regulate the expression of BmIAP gene in HEK293T cells with lentiviral expression systems and in BmN cells by transfecting mimics.Furthermore,BmCPV‐miR‐1 mimics could up‐regulate the expression level of BmIAP gene in midgut and fat body in the silkworm.In the midgut of BmCPV‐infected larvae,BmCPV‐miR‐1 mimics could be further up‐regulated and inhibitors could lower the virus‐mediated expression of BmIAP gene.With the viral genomic RNA segments S1 and S10 as indicators,BmCPV‐miR‐1 mimics could up‐regulate and inhibitors down‐regulate their replication in the infected silkworm.These results implied that BmCPV‐miR‐1 could inhibit cell apoptosis in the infected silkworm through up‐regulating BmIAP expression,providing the virus with a better cell circumstance for its replication. | Jian-Yong Guo Yong-Sheng Wang Tian Chen Xiao-Xu Jiang Ping Wu Tao Geng Zhong-Hua Pan Meng-Ke Shang Cheng-Xiang Hou Kun Gao Xi-Jie Guo | 2020 | Insect Science2020，27，3： | 6 |
| 8 | Local and Global Existence of Solutions to Initial Value Problems of Nonlinear Kaup-Kupershmidt Equations显示文摘这篇论文被奉献给学习nonlinearKaup- Kupershmidt 方程的起始的价值问题在酒吧+ a1 u 上的部分衍生物u/(部分衍生物 t )在酒吧+贝它上的部分衍生物( 2 )u/(部分衍生物 x ( 2 ))部分衍生物( 3 )u/(部分衍生物)在酒吧 x ( 3 )上+鲸鱼群妈在酒吧=上的部分衍生物( 5 )u/(部分衍生物 x ( 5 )) 0 ( x , t ) epsilonR-2 ,并且在酒吧+上的部分衍生物u/(部分衍生物 t )一( 2 )在酒吧上的部分衍生物u/(部分衍生物 x )在酒吧+贝它上的部分衍生物( 2 )u/(部分衍生物 x ( 2 ))部分衍生物( 3 )u/(部分衍生物 x ( 3 ))在酒吧+鲸鱼群妈上在酒吧=上的部分衍生物( 5 )u/(部分衍生物 x ( 5 )) 0 ,( x , t ) epsilon R-2 。为相应线性问题的基本答案的几重要 Strichartz 类型估计被建立。然后,我们使用如此的估计证明非线性的 Kaup-Kupershmidt 方程的起始的价值问题的解决方案的本地、全球的存在。如果,结果证明一个本地解决方案存在起始的函数 u (0 )(x) epsilon H-s (R) ,和 s > 为第一个方程和 s 的 = 5/4 > 为第二个方程的 = 301/108。 | Shuang Ping TAO Shang Bin CUI | 2005 | Acta Mathematica Sinica,English Series2005，21，4： | 6 |
| 9 | Emerging Flexible Thermally Conductive Films:Mechanism,Fabrication,Application显示文摘Effective thermal management is quite urgent for electronics owing to their ever-growing integration degree,operation frequency and power density,and the main strategy of thermal management is to remove excess energy from electronics to outside by thermal conductive materials.Compared to the conventional thermal management materials,flexible thermally conductive films with high in-plane thermal conductivity,as emerging candidates,have aroused greater interest in the last decade,which show great potential in thermal management applications of next-generation devices.However,a comprehensive review of flexible thermally conductive films is rarely reported.Thus,we review recent advances of both intrinsic polymer films and polymer-based composite films with ultrahigh in-plane thermal conductivity,with deep understandings of heat transfer mechanism,processing methods to enhance thermal conductivity,optimization strategies to reduce interface thermal resistance and their potential applications.Lastly,challenges and opportunities for the future development of flexible thermally conductive films are also discussed. | Chang‑Ping Feng Fang Wei Kai‑Yin Sun Yan Wang Hong‑Bo Lan Hong‑Jing Shang Fa‑Zhu Ding Lu Bai Jie Yang Wei Yang | 2022 | Nano-Micro Letters2022，14，8： | 6 |
| 10 | Structuring Nonlinear Wavefront Emitted from Monolayer Transition-Metal Dichalcogenides显示文摘The growing demand for tailored nonlinearity calls for a structure with unusual phase discontinuity that allows the realization of nonlinear optical chirality,holographic imaging,and nonlinear wavefront control.Transition-metal dichalcogenide(TMDC)monolayers offer giant optical nonlinearity within a few-angstrom thickness,but limitations in optical absorption and domain size impose restriction on wavefront control of nonlinear emissions using classical light sources.In contrast,noble metal-based plasmonic nanosieves support giant field enhancements and precise nonlinear phase control,with hundred-nanometer pixellevel resolution;however,they suffer from intrinsically weak nonlinear susceptibility.Here,we report a multifunctional nonlinear interface by integrating TMDC monolayers with plasmonic nanosieves,yielding drastically different nonlinear functionalities that cannot be accessed by either constituent.Such a hybrid nonlinear interface allows second-harmonic(SH)orbital angular momentum(OAM)generation,beam steering,versatile polarization control,and holograms,with an effective SH nonlinearityχ^((2))of~25 nm/V.This designer platform synergizes the TMDC monolayer and plasmonic nanosieves to empower tunable geometric phases and large field enhancement,paving the way toward multifunctional and ultracompact nonlinear optical devices. | Xuanmiao Hong Guangwei Hu Wenchao Zhao Kai Wang Shang Sun Rui Zhu Jing Wu Weiwei Liu Kian Ping Loh Andrew Thye Shen Wee Bing Wang Andrea Alù Cheng-Wei Qiu Peixiang Lu | 2020 | Research2020，，1： | 5 |
| 11 | Commissioning the photocathode radio frequency gun:a candidate electron source for Hefei Advanced Light Facility显示文摘The Hefei Advanced Light Facility(HALF)proposed by the National Synchrotron Radiation Laboratory(NSRL)is a diffraction-limited storage ring(DLSR),which plans to use a full energy linac as the injector.To ensure injection efficiency,the injection beam needs to have low emittance.Therefore,a photocathode radio frequency(RF)gun was developed in the HALF R&D project.The gun is designed to deliver high-quality electron bunches with a typically 0.5 nC charge and~4.5 MeV energy with low emittance.The initial system commission with an electron beam was completed at the end of 2020,and a stable 1.2–1.4 mm.mrad emittance with a bunch charge of 500 pC was demonstrated.In this paper,we report the experimental results and experience obtained during the commission,including the RF gun,drive laser system,and beam diagnostics. | Wen-Xing Wang Cheng Li Zhi-Gang He Shan-Cai Zhang Rui-Xuan Huang Wei-Wei Li Ping Lu Chuan Li Lei-Lei Tang Feng-Lei Shang Fang-Fang Wu Da-Chun Jia Hai-Yan Zhang Wei Wang | 2022 | Nuclear Science and Techniques2022，33，3： | 4 |
| 12 | The clock system for LHAASO WCDA based on reduced White Rabbit显示文摘Due to the large scale of Water Cherenkov Detector Array in Large High Altitude Air Shower Observatory, the frontend digitization is imperative.Thus a clock distribution system is desired,which broadcasts the synchronous clock signals with low jitter to the frontend electronics distributed in the field of 90 000 m^2.The White Rabbit protocol provides an option,which has been approved to achieve sub-ns accuracy and ps jitter in the synchronization of around 1 000 nodes in the order of 10 km.But the hierarchy of the original is too complex for Large High Altitude Air Shower Observatory application.Thus we proposed a reduced scheme based on the White Rabbit protocol.The validation circuit shows that the clock skew due to the fiber length difference can be adjusted to less than 25 ps and the clock jitter is less than 62 ps. | LI Cheng LIU Shubin SHANG Linfeng CAO Ping AN Qi | 2012 | Nuclear Science and Techniques2012，23，4： | 3 |
| 13 | Combined detection and subclass characteristics analysis of CTCs and CTECs by SE-iFISH in ovarian cancer显示文摘Objective:Hematogenous metastasis is essential for the progression of ovarian cancer(OC),and circulating tumor cells(CTCs)are part of the metastatic cascade.However,the detection rate of CTC is low due to the use of less sensitive detection methods.Therefore,this study aimed to detect CTCs and circulating tumorigenic endothelial cells(CTECs)in patients with OC using subtraction enrichment and immunostaining and fluorescence in situ hybridization(SE-iFISH).Methods:We enrolled a total of 56 subjects,including 20 OC patients and 36 ovarian benign tumor patients.CTCs and CTECs were captured by subtraction enrichment(SE)and counted and classified according to immunofluorescence staining of tumor markers(TMs)carbohydrate antigen 125(CA125)and human epididymis protein 4(HE4)combined with fluorescence in situ hybridization(iFISH)of chromosome 8(Chr8)aneuploidy.The diagnostic value and subtype characteristics of CTCs and CTECs were investigated.Results:The detection rate of CTCs by SE-iFISH was high.Compared with CA125 and HE4,Chr8 aneuploidy was the major identification feature of CTC.CTC counts in OC were statistically higher than those in benign groups.CTC and CTEC with≥pentaploidy were detected in both groups,illustrating the poor diagnostic value of CTC or CTEC.Distributions of triploid and tetraploid CTC subtypes were significantly different,and combined detection of triploid and tetraploid CTCs showed the best diagnostic value.In contrast,the distribution of CTECs in the OC and benign groups had no statistically significant difference.Small CTCs accounted for over 1/3 of the total CTC count.We also found that small CTCs and CTECs primarily comprised triploid cells,while large CTCs and CTECs mainly comprised pentaploidy and beyond.Conclusions:The application of SE-iFISH offered a more comprehensive understanding of heterogeneous CTCs and CTECs in OC.Analysis of subclass characteristics of the CTCs and CTECs according to Chr8 aneuploidy and cell size may broaden their potential clinical utility and deepen mechanistic studies in OC. | Hongyan Cheng Shang Wang Wenqing Luan Xue Ye Sha Dou Zhijian Tang Honglan Zhu Peter Ping Lin Yi Li Heng Cui Xiaohong Chang | 2021 | Chinese Journal of Cancer Research2021，33，2： | 3 |
| 14 | Estimation on organic carbon content of source rocks by logging evaluation method as exemplified by those of the 4^(th) and 3^(rd) members of the Shahejie Formation in western sag of the Liaohe Oilfield显示文摘One of the most important tasks of evaluating natural resources of petroliferous basins is to determine the organic matter abundance of source rocks in the basin.The usual method for assessing the organic carbon content of source rocks is based on laboratory analyses.There is a deviation in calculating organic carbon content due to the heterogeneous distribution of organic matter and the artificial factors when sampling.According to the continuous characteristics of information logging,the conventional logging curves(mainly acoustics and resistivity,etc.) were calibrated with the organic carbon experimental data of cores,cuttings or sidewall cores.The organic carbon content of source rocks of the 4 th(Es 4) and 3 rd(Es 3) members of the Shahejie Formation in western sag in the Liaohe depression was estimated directly by a great amount of continuous data including resistivity and acoustic logging,etc.Comparison between the results from computer processing and lab analysis of logging data shows that the organic carbon contents derived from the computer processing of logging data have the same reliability and accuracy as the lab analysis results.The present data show that this method is suitable to evaluate the source rocks of western sag in the Liaohe depression and has great potential in evaluating natural resources of sedimentary basins in the future.On the basis of logging data of source rocks,experimental data and existing geochemical analyses of the Liaohe Oilfield,the corresponding total organic carbon(TOC) isograms of source rocks were plotted.The source rocks of Es 4 and Es 3 of the Shahejie Formation are thought to be beneficial to hydrocarbon accumulation due to the high TOC. | LIU Luofu SHANG Xiaoqing WANG Ping GUO Yongqiang WANG Weili WU Lin | 2012 | Chinese Journal Of Geochemistry2012，31，4： | 3 |
| 15 | Pyridinic nitrogen enriched porous carbon derived from bimetal organic frameworks for high capacity zinc ion hybrid capacitors with remarkable rate capability显示文摘Aqueous zinc ion hybrid capacitors(ZIHCs)hold great potential for large-scale energy storage applications owing to their high safety and low cost,but suffer from low capacity and energy density.Herein,pyridinic nitrogen enriched porous carbon(nPC)was successfully synthesized via the growth,subsequent annealing and acid etching of bimetal organic frameworks for high capacity and safe ZIHCs with exceptional rate capability.Benefiting from the mesopores for easy ion diffusion,high electrical conductivity enabled by in-situ grown carbon nanotubes matrix and residual metal Co nanoparticles for fast electron transfer,sufficient micropores and high N content(8.9 at%)with dominated pyridinic N(54%)for enhanced zinc ion storage,the resulting nPC cathodes for ZIHCs achieved high capacities of 302 and137 m Ah g^(-1) at 1 and 18 A g^(-1),outperforming most reported carbon based cathodes.Theoretical results further disclosed that pyridinic N possessed larger binding energy of-4.99 eV to chemically coordinate with Zn2+than other N species.Moreover,quasi-solid-state ZIHCs with gelatin based gel electrolytes exhibited high energy density of 157.6 Wh kg^(-1) at 0.69 kW kg^(-1),high safety and mechanical flexibility to withstand mechanical deformation and drilling.This strategy of developing pyridinic nitrogen enriched porous carbon will pave a new avenue to construct safe ZIHCs with high energy densities. | Yao Li Pengfei Lu Ping Shang Lisha Wu Xiao Wang Yanfeng Dong Ronghuan He Zhong-Shuai Wu | 2021 | Journal of Energy Chemistry2021，30，5： | 3 |
| 16 | In vitro Dosimetric Study of Biliary Stent Loaded with Radioactive ^125I Seeds显示文摘 | Li-Hong Yao Jun-Jie Wang Charles Shang Ping Jiang Lei Lin Hai-Tao Sun Lu Liu Hao Liu Di He Rui-Jie Yang | 2017 | Chinese Medical Journal2017，，9： | 3 |
| 17 | Ciliate Uronema marinum is the causative agent of scuticociliatosis in farm raised turbot Scophthalmus maximus显示文摘To identify the pathogen that causes scuticociliatosis in farmed-raised turbot Scophthalmus maximus , we isolated a ciliate from the brain tissue of an infected turbot and identifi ed it as Uronema marinum based on morphological and molecular evidence. We then infected the turbots in artifi cial laboratory settings with pure cultured U . marinum . The infected turbots showed syndromes similar to those observed in naturally infected ones. Furthermore, microscopic examination and PCR detection confi rmed the presence of the ciliate in the tissues of those laboratory-infected turbots. To our best knowledge, this is the fi rst report of scuticociliatosis caused by U . marinum in farm-raised turbot S . maximus in China. | DU Guangxun QU Lingyun SHANG Kun SUN Chengjun WANG Chen GAO Ping | 2019 | Journal of Oceanology and Limnology2019，37，5： | 2 |
| 18 | Protein microarray analysis of cytokine expression changes in distal stumps after sciatic nerve transection显示文摘A large number of chemokines,cytokines,other trophic factors and the extracellular matrix molecules form a favorable microenvironment for peripheral nerve regeneration.This microenvironment is one of the major factors for regenerative success.Therefore,it is important to investigate the key molecules and regulators affecting nerve regeneration after peripheral nerve injury.However,the identities of specific cytokines at various time points after sciatic nerve injury have not been determined.The study was performed by transecting the sciatic nerve to establish a model of peripheral nerve injury and to analyze,by protein microarray,the expression of different cytokines in the distal nerve after injury.Results showed a large number of cytokines were up-regulated at different time points post injury and several cytokines,e.g.,ciliary neurotrophic factor,were downregulated.The construction of a protein-protein interaction network was used to screen how the proteins interacted with differentially expressed cytokines.Kyoto Encyclopedia of Genes and Genomes pathway and Gene ontology analyses indicated that the differentially expressed cytokines were significantly associated with chemokine signaling pathways,Janus kinase/signal transducers and activators of transcription,phosphoinositide 3-kinase/protein kinase B,and notch signaling pathway.The cytokines involved in inflammation,immune response and cell chemotaxis were up-regulated initially and the cytokines involved in neuronal apoptotic processes,cell-cell adhesion,and cell proliferation were up-regulated at 28 days after injury.Western blot analysis showed that the expression and changes of hepatocyte growth factor,glial cell line-derived neurotrophic factor and ciliary neurotrophic factor were consistent with the results of protein microarray analysis.The results provide a comprehensive understanding of changes in cytokine expression and changes in these cytokines and classical signaling pathways and biological functions during Wallerian degeneration,as well as a basis for potential treatments of peripheral nerve injury.The study was approved by the Institutional Animal Care and Use Committee of the Chinese PLA General Hospital,China(approval number:2016-x9-07)in September 2016. | Xiao-Qing Cheng Xue-Zhen Liang Shuai Wei Xiao Ding Gong-Hai Han Ping Liu Xun Sun Qi Quan He Tang Qing Zhao Ai-Jia Shang Jiang Peng | 2020 | Neural Regeneration Research2020，15，3： | 2 |
| 19 | Clock synchronization design and evaluation for trigger-less data acquisition system显示文摘For modern particle physics experiments,trigger-less data acquisition(DAQ) system has been put into practice because of the need of reaction multiplicity and trigger flexibility.In such new DAQ systems,global synchronized clock plays an important role because it affects the granularity of time slice and precision of reference clock.In this paper,a novel synchronized clock distribution method is proposed.With the help of modulation technique,master clock module distributes system clock to each slave module.To synchronize slave clocks,the propagation delay is adjusted and the clock phase is aligned by an FPGA chip automatically.Furthermore,an ADCbased method is proposed to evaluate the performance of multi-module clock synchronization simultaneously.The experiments of a prototype system show that slave clocks can be synchronized less than 100 ps over 150 m range.The proposed method is simple and flexible,and it can be used in trigger-less DAQ system and other applications of clock distribution preciously. | SHANG Linfeng SONG Kezhu CAO Ping | 2012 | Nuclear Science and Techniques2012，23，6： | 2 |
| 20 | A digital open-loop Doppler processing prototype for deep-space navigation显示文摘A prototype based on digital radio technology with associated open-loop Doppler signal processing techniques has been developed to measure a spacecraft's line-of-sight velocity. The prototype was tested in China's Chang'E-1 lunar mission relying on S-band telemetry signals transmitted by the sat-ellite,with results showing that the residuals had a RMS value of ~3 mm/s (1σ ) using 1-sec integration,which is consistent with the Chinese conventional USB (Unified S-Band) tracking system. Such preci-sion is mainly limited by the short-term stability of the atomic (e.g. rubidium) clock at the uplink ground station. It can also be improved with proper calibration to remove some effects of the transmission media (such as solar plasma,troposphere and ionosphere),and a longer integration time (e.g. down to 0.56 mm/s at 34 seconds) allowed by the spacecraft dynamics. The tracking accuracy can also be in-creased with differential methods that may effectively remove most of the long-term drifts and some of the short-term uncertainties of the uplink atomic clock,thereby further reducing the residuals to the 1 mm/s level. Our experimental tracking data have been used in orbit determination for Chang'E-1,while other applications (such as the upcoming YH-1 Mars orbiter) based on open-loop Doppler tracking will be initiated in the future. Successful application of the prototype to the Chang'E-1 mission in 2008 is believed to have great significance for China's future deep space exploration. | JIAN NianChuan SHANG Kun ZHANG SuJun WANG MingYuan SHI Xian PING JingSong YAN JianGuo TANG GeShi LIU JunZe QIU Shi FUNG Lai-Wo ZHANG Hua WANG Zhen GOU Wei | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，12： | 2 |
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