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| 1 | Applications of two-way satellite time and frequency transfer in the BeiDou navigation satellite system显示文摘A two-way satellite time and frequency transfer(TWSTFT) device equipped in the BeiDou navigation satellite system(BDS)can calculate clock error between satellite and ground master clock. TWSTFT is a real-time method with high accuracy because most system errors such as orbital error, station position error, and tropospheric and ionospheric delay error can be eliminated by calculating the two-way pseudorange difference. Another method, the multi-satellite precision orbit determination(MPOD)method, can be applied to estimate satellite clock errors. By comparison with MPOD clock estimations, this paper discusses the applications of the BDS TWSTFT clock observations in satellite clock measurement, satellite clock prediction, navigation system time monitor, and satellite clock performance assessment in orbit. The results show that with TWSTFT clock observations, the accuracy of satellite clock prediction is higher than MPOD. Five continuous weeks of comparisons with three international GNSS Service(IGS) analysis centers(ACs) show that the reference time difference between BeiDou time(BDT) and golbal positoning system(GPS) time(GPST) realized IGS ACs is in the tens of nanoseconds. Applying the TWSTFT clock error observations may obtain more accurate satellite clock performance evaluation in the 104 s interval because the accuracy of the MPOD clock estimation is not sufficiently high. By comparing the BDS and GPS satellite clock performance, we found that the BDS clock stability at the 103 s interval is approximately 10.12, which is similar to the GPS IIR. | ShanShi Zhou XiaoGong Hu Li Liu Rui Guo LingFeng Zhu ZhiQiao Chang ChengPan Tang XiuQiang Gong Ran Li Yang Yu | 2016 | Science China(Physics,Mechanics & Astronomy)2016，59，10： | 6 |
| 2 | The Genomes of the Allohexaploid Echinochloa crus-galli and Its Progenitors Provide Insights into Polyploidization-Driven Adaptation显示文摘The hexaploid species Echinochloa crus-galli is one of the most detrimental weeds in crop fields,especially in rice paddies.Its evolutionary history is similar to that of bread wheat,arising through polyploidization after hybridization between a tetraploid and a diploid species.In this study,we generated and analyzed high-quality genome sequences of diploid(E.haploclada),tetraploid(E.oryzicola),and hexaploid(E.crus-galli)Echinochloa species.Gene family analysis showed a significant loss of disease-resistance genes such as those encoding NB-ARC domain-containing proteins during Echinochloa polyploidization,contrary to their significant expansionduring wheat polyploidization,suggesting that natural selection might favor reduced investment in resistance in this weed to maximize its growth and reproduction.In contrast to the asymmetric patterns of genome evolution observed in wheat and other crops,no significant differences in selection pressure were detected between the subgenomes in E.oryzicola and E.crus-galli.In addition,distinctive differences in subgenome transcriptome dynamics during hexaploidization were observed between E.crus-galli and bread wheat.Collectively,our study documents genomic mechanisms underlying the adaptation of a major agricultural weed during polyploidization.The genomic and transcriptomic resources of three Echinochloa species and new insights into the polyploidization-driven adaptive evolution would be useful for future breeding cereal crops. | Chu-Yu Ye Dongya Wu Lingfeng Mao Lei Jia Jie Qiu Sangting Lao Meihong Chen Bowen Jiang Wei Tang Qiong Peng Lang Pan Lifeng Wang Xiaoxiao Feng Longbiao Guo Chulong Zhang Elizabeth A.Kellogg Kenneth M.Olsen Lianyang Bai Longjiang Fan | 2020 | Molecular Plant2020，13，9： | 4 |
| 3 | The method and experiment analysis of two-way common-view satellite time transfer for compass system显示文摘Time synchronization between ground and satellites is a key technology for satellite navigation system. With dual-channel satellite, a method called Two-Way Common-View(TWCV) satellite time transfer for Compass system is proposed, which combines both characteristics of satellite common-view and two-way satellite-ground time transfer. By satellite-ground two-way pseudo-range differencing and two stations common-view differencing, this TWCV method can completely eliminate the influence of common errors, such as satellite clock offset, ephemeris errors, troposphere delay and station coordinates errors. At the same time, ionosphere delay related to signal frequency is also weakened significantly. So the precision of time transfer is improved much more greatly than before. In this paper, the basic principle is introduced in detail, the effect of major errors is analyzed and the practical calculation model in the Earth-fixed coordinate system for this new method is provided. Finally, experiment analysis is conducted with actual Compass observing data. The results show that the deviation and the stability of the satellite dual channel can be better than 0.1 ns, and the accuracy of the two-way common-view satellite time transfer can achieve 0.4 ns. All these results have verified the correctness of this TWCV method and model. In addition, we compare this TWCV satellite time transfer with the independent C-band TWSTFT(Two-Way Satellite Time and Frequency Transfer). It shows that the result of the TWCV satellite time transfer is in accordance with the C-band TWSTFT result, which further suggests that the TWCV method is a remote high precision time transfer technique. The research results in this paper are very important references for the development and application of Compass satellite navigation system. | LIU Li TANG GuiFen HAN ChunHao SHI Xin GUO Rui ZHU LingFeng | 2015 | Science China(Physics,Mechanics & Astronomy)2015，58，8： | 2 |
| 4 | Sulfonylurea in the treatment of neonatal diabetes mellitus children with heterogeneous genetic backgrounds显示文摘 | Miaoying Zhang Xiuli Chen Shuixian Shen Tang Li Linqi Chen Min Hu Lingfeng Cao Ruoqian Cheng Zhuhui Zhao Feihong Luo | 2015 | Journal of Pediatric Endocrinology and Metabolism . 2015 (7-8)2015，，7： | 1 |
| 5 | Real time monitoring of nucleic acids ligation based on molecular beacon显示文摘A novel method has been developed to monitor the nucleic acids ligation process. Molecular beacon was employed here to convert the ligation information into fluo-rescence signal quickly and quantitatively. This method pro-vides effective and original approach to researching the dy-namic ligation process and the interactions between nucleic acids and ligase. An analytical method for T4 DNA ligase based on this way has been built up with a linear detection range from 2.3×10-4 U/mL to 0.23 U/mL. It is rapid and sensitive to detect 2.8×10-5 U T4 DNA ligase in 10 min. | Zhiwen Tang Kemin Wang Weihong Tan Jun Li Lingfeng Liu Qiuping Guo Xiangxian Meng Shasheng Huang Du Li Weifang Luo | 2003 | Chinese Science Bulletin2003，48，12： | 1 |
| 6 | Ten-Eleven Translocation-2 (TET2) Is a Master Regulator of Smooth Muscle Cell Plasticity显示文摘 | Renjing Liu Yu Jin Wai Ho Tang Lingfeng Qin Xinbo Zhang George Tellides John Hwa Jun Yu Kathleen A. Martin | 2013 | Circulation2013，，18： | 1 |
| 7 | Experimental and Numerical Analysis of the Relationship between Pressure and Drip Rate in a Vertical Polypropylene Infusion Bag显示文摘Vertical infusion(self-emptying)bags used for Intravenous infusion are typically obtained by moulding a soft envelope of polypropylene.In normal conditions a continuous flow of liquid can be obtained with no need to use a pump.In the present study,the relationship between air pressure effects and the drug drip rate have been investigated experimentally and numerically.After determining relevant experimental data about the descending height of liquid level,the dropping speed and pressure,the ordinary least square method and MATLAB have been used to reconstruct the related variation and interrelation laws.Numerical simulations have been performed to determine the best gas-liquid volume ratio and improve the overall performances of these bags.According to these results,that the biggest effect on the drip rate is produced by the diameters of the used needles. | Weiwei Duan Lingfeng Tang | 2021 | Fluid Dynamics & Materials Processing2021，17，6： | 0 |
| 8 | Impairment of TRPC1-BK complex in diabetic rat coronary artery显示文摘To the Editor:Diabetes mellitus(DM)is a chronic disease that endangers human health and can lead to different complications.[1]Coronary artery,disease is one of the most serious complications in DM patients. | Manqing Sun Lingling Qian Lingfeng Miao Ying Wu Xiaoyu Liu Shipeng Dang Xu Tang Zhenye Zhang Chao Wang Qiang Chai Fu Yi Jianfeng Hao Ruxing Wang | 2022 | Chinese Medical Journal2022，，15： | 0 |
| 9 | Optimal Structural Parameters for a Plastic Centrifugal Pump Inducer显示文摘The aim of the study is to determine the optimal structural parameters for a plastic centrifugal pump inducer within the framework of an orthogonal experimental method.For this purpose,a numerical study of the related flow field is performed using CFX.The shaft power and the head of the pump are taken as the evaluation indicators.Accordingly,the examined variables are the thickness(S),the blade cascade degree(t),the blade rim angle(β1),the blade hub angle(β2)and the hub length(L).The impact of each structural parameter on each evaluation index is examined and special attention is paid to the following combinations:S2 mm,t 2,β1235°,β2360°and L 140 mm(corresponding to a maximum head of 98.15 m);S 5 mm,t 1.6,β1252°,β2350°and L 140 mm(corresponding to a minimum shaft power of 63.06 KW).Moreover,using least squares and fish swarm algorithms,the pump shaft power and head are further optimized,yielding the following optimal combination:S 5 mm,t 1.9,β1252°,β2360°and L 145 mm(corresponding to the maximum head of 91.90 m,and a minimum shaft power of 64.83 KW). | Wenbin Luo Lingfeng Tang Yuting Yan Yifang Shi | 2023 | Fluid Dynamics & Materials Processing2023，19，4： | 0 |
| 10 | Rapid and durable oxygen reduction reaction enabled by a perovskite oxide with self-cleaning surface显示文摘The growth of electrochemically inert segregation layers on the surface of solid oxide fuel cell cathodes has become a bottleneck restricting the development of perovskite-structured oxygen reduction catalysts.Here,we report a new discovery in which enriched Ba and Fe ions on the near-surface of Nd_(1/2)Ba_(1/2)Co_(1/3)Fe_(1/3)Mn_(1/3)O_(3-δ)spontaneously agglomerate into dispersed Ba_(5)Fe_(2)O_(8) nanoparticles and maintain a highly active and durable perovskite structure on the surface.This unique surface selfcleaning phenomenon is related to the low average potential energy of Ba_(5)Fe_(2)O_(8),which is grown on the near-surface layer.The electrochemically inert Ba_(5)Fe_(2)O_(8) segregation layer on the near-surface of the perovskite catalyst achieves self-cleaning by regulating the formation energy of enriched metal oxides.This self-cleaned perovskite surface exhibits an ultrafast oxygen exchange rate,high catalytic activity for the oxygen reduction reaction,and good adaptability to the actual working conditions of solid oxide fuel cell stacks.This study paves a new way for overcoming the stubborn problem of perovskite catalyst surface deactivation and enriches the scientific knowledge of surface catalysis. | Shengli Pang Yifan Song Meng Cui Xin Tang Chao Long Lingfeng Ke Gongmei Yang Ting Fang Yong Guan Chonglin Chen | 2023 | Journal of Energy Chemistry2023，，8： | 0 |
| 11 | Optimization of the Structural Parameters of a Plastic Centrifugal Pump显示文摘The structural design parameters of a plastic centrifugal pump were calculated and modeled,and flow field simulation analysis of the model was performed using CFD,in the framework of an orthogonal design method(or experiment).The inlet mounting angleβ1,outlet mounting angleβ2,wrap angleϕ,and impeller inlet diameter D1 of the pump impeller were the four factors assumed for the application of the orthogonal experiment,using the efficiency and Net Positive Suction Head(NPSH)as evaluation indices.Moreover,taking the maximum efficiency and minimum NPSH of the plastic centrifugal pump as the evaluation factors,the parameters of the pump impeller were re-optimized through the Taguchi algorithm(leading to the following optimal combination:inlet diameter 35 mm,inlet angle 26°,outlet angle 27°,and wrap angle 110°).The minimum NPSH and the maximum efficiency have been found to be 0.957%and 61.5%,respectively. | Yifang Shi Lingfeng Tang Yinwu Tan Wenbin Luo | 2022 | Fluid Dynamics & Materials Processing2022，18，3： | 0 |
| 12 | Mass transfer analysis for microwave hot in-place recycling of asphalt pavements显示文摘 | Sun Tongsheng Shi Jinfei Tang Lingfeng | 2012 | High Technology Letters2012，18，1： | 0 |
| 13 | (Ba_(1−x)Na_(x))F(Zn_(1−x)Mn_(x))Sb: A novel fluoride-antimonide magnetic semiconductor with decoupled charge and spin doping显示文摘We report the successful synthesis and characterization of a novel 1111-type magnetic semiconductor(Ba_(1−x)Na_(x))F(Zn_(1−x)Mn_(x))Sb(0.05≤x≤0.175)with tetragonal ZrSiCuAs-type structure,which is isostructural to the layered iron-based superconductor La(O,F)FeAs.Na substitutions for Ba and Mn substitutions for Zn introduce carriers and local magnetic moments,respectively.Ferromagnetic interaction is formed when Na and Mn are codoped,demonstrating that local magnetic moments are mediated by carriers.Iso-thermal magnetization shows that the coercive field is as large as-12000 Oe,which is also reflected in the large split between the temperature-dependent magnetization in zero-field-cooling and field-cooling condition.AC susceptibility under zero field demonstrates that samples evolve into spin-glass state below spin freezing temperature T_(f).The measurements of temperature-dependent resistivity indicate that(Ba_(1−x)Na_(x))F(Zn_(1−x)Mn_(x))Sb exhibits semiconducting behaviour. | Xueqin Zhao Jinou Dong Licheng Fu Yilun Gu Rufei Zhang Qiaolin Yang Lingfeng Xie Yinsong Tang Fanlong Ning | 2022 | Journal of Semiconductors2022，43，11： | 0 |
| 14 | Establishment of green graphite industry:Graphite from biomass and its various applications显示文摘Resource-and energy-efficient biomass exploitation for green graphite production is one of the most effective strategies for satisfying graphite demand while minimizing energy consumption and carbon emissions.This study investigated green graphite production from biomass waste and its applications to establish a green graphite industry.Biomass pyrolysis and catalytic graphitization of biochar were studied first to produce green graphite.The optimized green graphite exhibited a reversible capacity of 264 mA h/g and 97%capacity retention over 100 cycles in a half-cell.Green graphite electrodes with a resistivity lower than 5μΩm were fabricated by using organic fraction bio-oil as a green binder.Other green graphite applications,including printing,conductive printing,pencils,and refractories,were also achieved.The overall process of graphite anode and electrode synthesis from biomass waste and short-rotation energy crops was modeled.Approx.95 kg of battery graphite or 109 kg of metallurgical graphite electrodes can be produced per ton of biomass with low primary energy consumption and carbon footprint.Prominently,the modeling result and life cycle assessment demonstrated that,for the production of battery graphite from biomass waste,net-negative-CO_(2)emissions(−0.57 kg CO_(2)-eq/kg graphite powders)with net-negative-primary energy consumption(−28.31 MJ/kg graphite powders)was achieved. | Ziyi Shi Shule Wang Yanghao Jin Lingfeng Zhao Shiwei Chen Hanmin Yang Yuxiao Cui Rikard Svanberg Chuchu Tang Jianchun Jiang Weihong Yang PäGJösson Tong Han | 2023 | SusMat2023，3，3： | 0 |
| 15 | Multi-disciplinary surgery for simultaneous resection of multiple tumors in a patient with newly diagnosed metastatic pheochromocytoma/paraganglioma显示文摘Metastatic pheochromocytoma/paraganglioma(MPP)is a rare endocrine tumor that originates from extra-adrenal chromaffin cells such as the paraganglia cells of sympathetic and parasympathetic nerves.It usually causes multiple solid tumors and exhibits strong aggressiveness with poor prognosis,with a reported 5-year survival rate of less than 50%.Cases of brain and retroperitoneal metastases at the initial diagnosis have not yet been reported.We report a 41-year-old male patient initially diagnosed with MPP in the brain and retroperitoneum who underwent multi-disciplinary collaborative surgery and simultaneous removal of two tumors at our center.Postoperative pathology revealed infiltrative growth of a skull base tumor.The patient chose to receive the tyrosine kinase inhibitor sunitinib as a targeted treatment.A 3-month follow-up after surgery showed that the patient recovered well without signs of metastasis or recurrence.We present multi-disciplinary surgery under similar circumstances for enhanced treatment and postoperative management.The patient demonstrates a favorable prognosis during postoperative follow-up,indicating that simultaneous multidisciplinary surgery may offer greater benefits for MPP patients. | Jibo Jing Lingfeng Meng Yaoguang Zhang Runhua Tang Haoran Wang Jiaxing Ning Xinhao Wang | 2023 | Cancer Pathogenesis and Therapy2023，1，4： | 0 |
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