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| 1 | Commissioning progress of the FAST显示文摘The Five-hundred-meter Aperture Spherical radio Telescope(FAST) was completed with its main structure installed on September 25, 2016, after which it entered the commissioning phase. This paper aims to introduce the commissioning progress of the FAST over the past two years. To improve its operational reliability and ensure effective observation time, FAST has been equipped with a real-time information system for the active reflector system and hierarchical commissioning scheme for the feed support system, which ultimately achieves safe operation of the two systems. For meeting the high-performance indices, a highprecision measurement system was set up based on the effective control methods that were implemented for the active reflector system and feed support system. Since the commissioning of the FAST, a low-frequency ultra-wideband receiver and 19-beam1.05-1.45 GHz receiver have been mainly used. Telescope efficiency, pointing accuracy, and system noise temperature were completely tested and ultimately achieved the acceptance indices of the telescope. The FAST has been in the process of national acceptance preparations and has begun to search for pulsars. In the future, it will still strive to improve its capabilities and expand its application prospects. | Peng Jiang YouLing Yue HengQian Gan Rui Yao Hui Li GaoFeng Pan JingHai Sun DongJun Yu HongFei Liu NingYu Tang Lei Qian JiGuang Lu Jun Yan Bo Peng ShuXin Zhang QiMing Wang Qi Li Di Li | 2019 | Science China(Physics,Mechanics & Astronomy)2019，62，5： | 11 |
| 2 | Diagenesis of the Triassic Yanchang Formation Tight Sandstone Reservoir in the Xifeng–Ansai Area of Ordos Basin and its Porosity Evolution显示文摘This work aims to reveal the evolution of the porosity in the Triassic Yanchang Formation tight sandstone reservoir of the Xifeng–Ansai area of Ordos Basin. Based on destructive diagenesis(compaction and cementation) and constructive diagenesis(dissolution) of sandstone reservoirs, this study analyzed the diagenesis characteristics of the tight sandstone reservoirs in this area, and discussed the relationship between sandstone diagenesis and porosity evolution in combination with present porosity profile characteristics of sandstone reservoir. The effect simulation principle was employed for the mathematical derivation and simulation of the evolution of porosity in the Yanchang Formation tight sandstone reservoirs. The result shows that compaction always occurs in tight sandstone reservoirs in the Yanchang Formation, and cementation occurs when the burial depth increases to a certain value and remains ever since. Dissolution occurs only at a certain stage of the evolution with window features. In the corresponding present porosity profile, diagenesis is characterized by segmentation. From the shallow to the deep, compaction, compaction, cementation and dissolution, compaction and cementation occur successively. Therefore, the evolution of sandstone porosity can be divided into normal compaction section, acidification and incremental porosity section, and normal compaction section after dissolution. The results show that the evolution of sandstone porosity can be decomposed into porosity reduction model and porosity increase model. The superposition of the two models at the same depth in the three stages or in the same geological time can constitute the evolution simulation of the total porosity in sandstone reservoirs. By simulating the evolution of sandstone reservoir porosity of the eighth member in Xifeng area and the sixth member in Ansai area, it shows that they are similar in the evolution process and trend. The difference is caused by the regional uplift or subsidence and burial depth. | LIU Mingjie LIU Zhen WANG Peng PAN Gaofeng | 2016 | Acta Geologica Sinica(English Edition)2016，90，3： | 11 |
| 3 | The first pulsar discovered by FAST显示文摘To assist with the commissioning [1] of the Five-hundredmeter Aperture Spherical radio Telescope (FAST), we performed a pulsar search, with the primary goal of developing and testing the pulsar data acquisition and processing pipelines. We tested and used three pipelines, two (Pl and P2 hereafter) searched for the periodic signature of pulsars whereas the other one was used to search for bright single pulses (P3 hereafter). | Lei Qian ZhiChen Pan Di Li George Hobbs WeiWei Zhu Pei Wang ZhiJie Liu YouLing Yue Yan Zhu HongFei Liu DongJun Yu JingHai Sun Peng Jiang GaoFeng Pan Hui Li HengQian Gan Rui Yao XiaoYao Xie Fernando Camilo Andrew Cameron Lei Zhang Shen Wang FAST Collaboration | 2019 | Science China(Physics,Mechanics & Astronomy)2019，62，5： | 3 |
| 4 | Tet2 Regulates Osteoclast Differentiation by Interacting with Runx1 and Maintaining Genomic 5-Hydroxymethylcytosine(5hmC)显示文摘As a dioxygenase, Ten-Eleven Translocation 2(TET2) catalyzes subsequent steps of 5-methylcytosine(5 mC) oxidation. TET2 plays a critical role in the self-renewal, proliferation,and differentiation of hematopoietic stem cells, but its impact on mature hematopoietic cells is not well-characterized. Here we show that Tet2 plays an essential role in osteoclastogenesis. Deletion of Tet2 impairs the differentiation of osteoclast precursor cells(macrophages) and their maturation into bone-resorbing osteoclasts in vitro. Furthermore, Tet2^(-/-) mice exhibit mild osteopetrosis, accompanied by decreased number of osteoclasts in vivo. Tet2 loss in macrophages results in the altered expression of a set of genes implicated in osteoclast differentiation, such as Cebpa, Mafb, and Nfkbiz. Tet2 deletion also leads to a genome-wide alteration in the level of 5-hydroxymethylcytosine(5 hmC) and altered expression of a specific subset of macrophage genes associated with osteoclast differentiation. Furthermore, Tet2 interacts with Runx1 and negatively modulates its transcriptional activity. Our studies demonstrate a novel molecular mechanism controlling osteoclast differentiation and function by Tet2, that is, through interactions with Runx1 and the maintenance of genomic 5 hmC. Targeting Tet2 and its pathway could be a potential therapeutic strategy for the prevention and treatment of abnormal bone mass caused by the deregulation of osteoclast activities. | Yajing Chu Zhigang Zhao David Wayne Sant Ganqian Zhu Sarah M. Greenblatt Lin Liu Jinhuan Wang Zeng Cao Jeanette Cheng Tho Shi Chen Xiaochen Liu Peng Zhang Jaroslaw P. Maciejewski Stephen Nimer Gaofeng Wang Weiping Yuan Feng-Chun Yang Mingjiang Xu | 2018 | Genomics, Proteomics & Bioinformatics2018，16，3： | 2 |
| 5 | Stability Analysis of Nonlinear Networked Control System with Integral Quadratic Constraints Performance in Takagi-Sugeno Fuzzy Model显示文摘This paper focuses on the stability analysis of nonlinear networked control system with integral quadratic constraints(IQC) performance, dynamic quantization, variable sampling intervals, and communication delays. By using input-delay and parallel distributed compensation(PDC) techniques, we establish the Takagi-Sugeno(T-S) fuzzy model for the system, in which the sampling period of the sampler and signal transmission delay are transformed to the refreshing interval of a zero-order holder(ZOH). By the appropriate Lyapunov-Krasovskii-based methods, a delay-dependent criterion is derived to ensure the asymptotic stability for the system with IQC performance via the H∞ state feedback control. The efficiency of the method is illustrated on a simulation exampler. | PENG Gaofeng LIU Hongping LENG Yang WANG Yong ZHAO Na | 2019 | Wuhan University Journal of Natural Sciences2019，24，5： | 2 |
| 6 | Characterization and ultraviolet-visible shielding property of samarium-cerium compounds containing Sm_(2)O_(2)S prepared by co-precipitation method显示文摘Since ultraviolet(UV)light,as well as blue light,which is part of visible light,is harmful to skin,samarium-cerium compounds containing Sm_(2)O_(2)S were synthesized by co-precipitation method.This kind of compounds blocks not only UV light,but also blue light.The minimum values of average transmittance(360-450 nm)and band gap of samarium-cerium compounds were 8.90%and 2.76 eV,respectively,which were less than 13.96%and 3.01 eV of CeO_(2).Elemental analysis(EA),X-ray diffraction(XRD),Fourier transformation infrared(FTIR),and Raman spectra determined that the samples contained Ce_(4)O_(7),Sm_(2)O_(2)S,Sm_(2)O_(3),and Sm_(2)O_(2)SO_(4).The microstructure of samples was analyzed by scanning and transmission electron microscopies(SEM and TEM).X-ray photoelectron spectrum(XPS)showed that cerium had Ce^(3+)and Ce^(4+) valence states,and oxygen was divided into lattice oxygen and oxygen vacancy,which was the direct cause of the decrease of average transmittance and band gap. | Yanping Li Xue Bian Xun Jin Peng Cen Wenyuan Wu Gaofeng Fu | 2022 | International Journal of Minerals,Metallurgy and Materials2022，29，9： | 1 |
| 7 | The composition and distribution of chemicals and isotopes in precipitation in the Shiyang River system, northwestern China显示文摘 | Jinzhu Ma Peng Zhang Gaofeng Zhu Yunquan Wang W. Mike Edmunds Zhenyu Ding Jianhua He | 2012 | Journal of Hydrology2012，，： | 1 |
| 8 | The composition and distribution of chemicals and isotopes in precipitation in the Shiyang River system, northwestern China显示文摘 | Jinzhu Ma Peng Zhang Gaofeng Zhu Yunquan Wang W. Mike Edmunds Zhenyu Ding Jianhua He | 2012 | Journal of Hydrology2012，，： | 1 |
| 9 | Plant regeneration from leaf-derived callus in Citrus grandis(pummelo): Effects of auxins in callus induction medium显示文摘 | Huang Tao Peng Shaolin Dong Gaofeng Zhang Lanying Li Gengguang | 2002 | Plant Cell Tissue and Organ Culture2002，，2： | 1 |
| 10 | Potential factors and mechanism of particulate matters explosive increase induced by free radicals oxidation显示文摘Atmospheric particulate pollution in China has attracted much public attention.Occasionally, the particle number concentration increases sharply in a short time period,which is defined as a 'particulate matter explosive increase'. Heavy particulate matter pollution not only reduces visibility but also has an adverse effect on human health. Hence,there is an urgent need to discover the causes of particulate matter explosive increase.During this campaign, the particle number concentration and free radicals were measured at a tall building on the campus of Lanzhou University of Technology. Additionally, we examined a series of chemicals to reproduce the observed particulate matter explosive increase in a smog chamber to determine its potential factors. Then, we analyzed the mechanism of particulate matter explosive increase in the presence of free radicals. We found that, among the potential inorganic and organic sources analyzed, a mixture of organic and SO_2 in the research region had a major effect on particulate matter explosive increase. Moreover, free radical oxidation has a large effect, especially in the formation of organic particulates. | Guoying Wang Shiming Jia Xiuli Niu Haoqi Tian Yanrong Liu Zhong Xie Chao Liu Yucan Dong Ying Su Jianglei Yu Gaofeng Shi Xuefu Chen Lan Li Peng Zhang | 2019 | Journal of Environmental Sciences2019，31，7： | 0 |
| 11 | Study on fracture characteristics in coal and shale for coal-measure gas reservoir based on 3D CT reconstruction and fractal features显示文摘Pores and fractures are important components of flow channels in coal-measure gas reservoirs.While considerable studies have been conducted on pore structure evolution,very few studies have investigated the fracture distribution and self-similarity characteristics.To reveal the characteristics of fracture distribution in coal and shale reservoirs,computed tomography studies were performed on 15 coal and shale samples from the Shanxi and Taiyuan formations.The results show that the fracture distribution of samples of the same lithology differs significantly,and the fracture distribution heterogeneity of shale samples is much higher than that of coal samples.In shale,the heterogeneity of fracture distribution is mainly caused by pores and fractures smaller than 2μm in the z-direction,with relatively little contributions from pores and fractures in the x and y directions.However,the heterogeneity of fracture distribution in coal is mainly controlled by pores and fractures larger than 2μm in all directions,and the difference between the three directions is minor.It was shown that a great number of microscopic pores and fractures contribute to the highest fractions of porosity in different lithological samples.This method is useful for determining the fracture distribution characteristics in shale and coal-measure gas reservoir. | Huijun WANG Shangbin CHEN Shaojie ZHANG Chengxing ZHANG Yang WANG Gaofeng YI Yixuan PENG | 2023 | Frontiers of Earth Science2023，17，2： | 0 |
| 12 | Surface Functionalization of PEO Nanofibers Using a TiO_(2) Suspension as Sheath Fluid in a Modified Coaxial Electrospinning Process显示文摘Convenient and integration fabrication process is a key issue for the application of functional nanofibers.A surface functionalization method was developed based on coaxial electrospinning to produce ultraviolet(UV)protection nanofibers.The titanium dioxide(TiO_(2))nanoparticles suspension was delivered through the shell channel of the coaxial spinneret,by which the aggregation of TiO_(2) nanoparticles was overcome and the distribution uniformity on the surface of polyethylene oxide(PEO)nanofiber was obtained.With the content of TiO_(2) increasing from 0 to 3%(mass fraction),the average diameter of nanofibers increased from(380±30)nm to(480±100)nm.The surface functionalization can be realized during the electrospinning process to gain PEO/TiO_(2) composite nanofibers directly.The uniform distribution of TiO_(2) nanoparticles on the surface of nanofibers enhanced the UV absorption and resistance performance.The maximum UV protection factor(UPF)value of composite nanofibers reaches 2751.This work presented a novel surface-functionalized way for the preparation of composite nanofiber,which has great application potential in the field of micro/nano system integration fabrication. | ZHENG Gaofeng PENG Hao JIANG Jiaxin KANG Guoyi LIU Juan ZHENG Jianyi LIU Yifang | 2021 | Chemical Research in Chinese Universities2021，37，3： | 0 |
| 13 | Surfaced-modified TiO_(2) Nanofibers with Enhanced Photodegradation Under Visible Light显示文摘Asynchronized surface modification method based on coaxial electrospinning was developed to fabricate high-efficiency photodegradative nanofiber for water purification. TiO_(2) nanoparticles assembled uniformly on the surface of polycaprolactone(PCL) nanofibers to form composite nanofibers through one step process. The maximal content of Ti element was 25.6%(mass fraction) in the PCL/TiO_(2) composite nanofibrous membrane, which exhibited hydrophilicity and excellent photodegradation under visible light in water. The Rhodamine B dye degraded 96.17% in 120 min under visible light by the PCL/TiO_(2) composite membrane. The adsorption behavior fitted Langmuir model well and indicated chemical related adsorption. This PCL/TiO_(2) composite nanofibrous membrane has super degradation properties and displays great application potential to environmental protection. | PENG Hao JIANG Jiaxin LIUYifang WANG Xiang LI Wenwang ZHENG Gaofeng | 2022 | Chemical Research in Chinese Universities2022，38，6： | 0 |
| 14 | Recent advances in the syntheses of pyrroles显示文摘The pyrrole moiety is an important structural motif in functional materials,natural products,and pharmaceuticals.More and more synthetic strategies toward pyrroles have emerged,where various efficient building blocks are developed and these synthons enable the syntheses of pyrroles with different numbers of components.However,no review specifically summarizes the syntheses of pyrroles according to the type and number of employed building blocks.To aid researchers to design appropriate substrates for pyrrole synthesis,herein we summarized the advances in pyrrole syntheses and classified these reactions into four categories according to the number of employed components,which may shed light on developing more efficient synthetic methods toward substituted pyrroles. | Tao Shi Gaofeng Yin Xiaodong Wang Yongxia Xiong Yan Peng Shuang Li Yaofu Zeng Zhen Wang | 2023 | Green Synthesis and Catalysis2023，4，1： | 0 |
| 15 | Construction of Synergistic Co and Cu Diatomic Sites for Enhanced Higher Alcohol Synthesis显示文摘Higher alcohol synthesis(HAS)from syngas could efficiently alleviate the dependence on the traditional fossil resources.However,it is still challenging to construct high-performance HAS catalysts with satisfying selectivity,space–time yield(STY),and stability.Herein,we designed a diatomic catalyst by anchoring Co and Cu sites onto a hierarchical porous N-doped carbon matrix(Co/Cu–N–C).The Co/Cu–N–C is efficient for HAS and is among the best catalysts reported.With a COconversion of 81.7%,C2+OHselectivity could reach 58.5%with an outstanding C2+OH STY of 851.8 mg/g·h.We found that the N4–Co1 and Cu1–N4 showed an excellent synergistic effect.The adsorption of CO occurred on the Co site,and the surrounding nitrogen sites served as a hydrogen reservoir for the CO reduction reactions to form CHxCo.Meanwhile,the Cu sites stabilized a CHOCu species to interact with CHxCo,facilitating a barrier-free formation of C2 species,which is responsible for the high selectivity of higher alcohols. | Gaofeng Chen Olga A.Syzgantseva Maria A.Syzgantseva Shuliang Yang Guihua Yan Li Peng Changyan Cao Wenxing Chen Zhiwei Wang Fengjuan Qin Tingzhou Lei Xianhai Zeng Lu Lin Weiguo Song Buxing Han | 2023 | CCS Chemistry2023，5，4： | 0 |
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