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| 1 | Application of Pore Evolution and Fracture Development Coupled Models in the Prediction of Reservoir 'Sweet Spots' in Tight Sandstones显示文摘<正>The Chang-6~3 reservoir in the Huaqing area has widely developed tight sandstone reservoirs characterized by'thick sand layers,but not rich in oil',and it is thus necessary to further study its oil and gas enrichment law.This study builds porosity and fracture development | ZHANG Linyan ZHUO Xizhun MA Licheng CHEN Xiaoshuai SONG Licai ZHOU Xingui | 2015 | Acta Geologica Sinica(English Edition)2015，89，3： | 3 |
| 2 | A methodology to achieve the basis function for the expansion of sound speed profile显示文摘In order to evaluate the reliability and applicability of the Empirical Orthogonal Functions(EOFs)in the acoustic inversion of sound speed profile(SSP)and reduce EOF's dependence on the sample data,a methodology is proposed for the achievement of the basis functions for SSP's expansion.By analyzing the oceanographic dynamics which is the main cause of the SSP's variation,the basis functions are obtained naming the Hydrodynamic Normal Modes(HNMs).The HNM basis functions are almost the same as those derived from the EOF method,while HNMs has less dependence on the amount of the sample data.HNMs method has a physically meaningful interpretation,and it could give out the physical parameters which determine the basis functions for the expansion of SSP,and this makes it possible to analyze and evaluate the trustiness and applicability of EOFs. | SONG Wenhua HU Tao GUO Shengming MA Li LU Licheng | 2014 | Chinese Journal of Acoustics2014，33，3： | 2 |
| 3 | Recent studies on chemistry of novel μ-CO-containing butterfly Fe/E (E=S,Se,Te) cluster salts显示文摘This article describes recent developments in chemical study on a series of butterfly-shaped μ-CO-containing Fe/E (E = S, Se, Te) cluster salts. These salts include eleven novel cluster anions, which are the single butterfly one μ-CO-containing [(μ-RE)(μ-CO)Fe2(CO)6]- (A), the double butterfly two μ-CO-containing {[(μ-CO)Fe2(CO)6]2(μ-EZE-μ)}2- (B, E = S; C, E = Se), the triple butterfly three μ-CO- containing {[(μ-CO)Fe2(CO)6]3[(μ-SCH2CH2)3N]}3- (D), {[(μ-CO)Fe2(CO)6]3[1,3,5-(μ-SCH2)3C6H3]}3- (E), {[(μ- CO)Fe2(CO)6]3[(μ-SCH2)3CMe]}3- (F), the double butterfly one μ-CO-containing {[(μ-CO)Fe2(CO)6] [Fe2(CO)6][(μ-SCH2)3CMe]} - (G) derived in situ from F, the quadruple butterfly four μ-CO-containing {[(μ- CO)Fe2(CO)6]4[1,2,4,5-(μ-SCH2)4C6H2]}4- (H), the triple butterfly two μ-CO-containing {[(μ-CO)Fe2(CO)6]2 [Fe2(CO)6][1,2,4,5-(μ-SCH2)4C6H2]}2- (I) derived in situ from H, the quadruple butterfly four μ-CO-con- taining {[(μ-CO)Fe2(CO)6]4[(μ-SCH2)4C]}4- (J), and the triple butterfly two μ-CO-containing {[(μ-CO)Fe2 (CO)6]2[Fe2(CO)6][(μ-SCH2)4C]}2- (K) derived in situ from J. This article describes not only the synthetic methods for formation of such anionic cluster (A-K) salts, but also their novel reactions leading to various new types of butterfly Fe/E cluster complexes. All these findings described in this article are important both theoretically and practically. | SONG LiCheng Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China | 2009 | Science China Chemistry2009，52，1： | 1 |
| 4 | Synthesis,characterization and properties of new organocobalt complexes containing η^5-functionally substituted cyclopentadienyl andfullerene ligands显示文摘 | Song Licheng Liu Pengchong Hu Qingmei | 2003 | Journal of Organometallic Chemistry2003，681，12： | 1 |
| 5 | Seismic Behaviour of Beam-Column Joints of Precast and Partial Steel Reinforced Concrete显示文摘A beam-column joint of precast and partial steel reinforced concrete( PPSRC) is proposed for precast reinforced concrete frames. The PPSRC consists of partial steel and reinforced concrete. The partial steel is located in the core joint region and the connections between concrete members. This paper presents an experimental study of a series of PPSRC specimens. These specimens are tested under low cyclic loading.Experimental results demonstrate that the bearing capacity of the PPSRC specimens is 3 times that of the ordinary reinforced concrete( RC) beam-column joints. The strength and stiffness degradation rates are slower compared with that of the RC beam-column joints. In addition,the strength of the core joint region and the connections is higher than other parts of the PPSRC specimens. Beam failure occurs firstly for the PPSRC specimens,followed by column failure and connections failure. The failure of the core joint region occurs finally.Test results show that the seismic performance of the PPSRC is better than that of the ordinary RC beam-column joints. | Wanpeng Cheng Licheng Wang Yupu Song Jun Wang | 2015 | Journal of Harbin Institute of Technology(New Series)2015，22，2： | 1 |
| 6 | Sparse Coding and Classifier Ensemble Based Multi-instance Learning for Image Categorization 显示文摘 | Song Xiangfa Jiao Licheng Yang Shuyuan | 2013 | Signal Processing2013，93，1： | 1 |
| 7 | Dynamic Coupling Analysis of Semisubmersible Platform Float-over Method for Docking Case显示文摘In this paper,the multi-body coupled dynamic characteristics of a semisubmersible platform and an HYSY 229 barge were investigated.First,coupled hydrodynamic analysis of the HYSY 229 barge and the semisubmersible platform was performed.Relevant hydrodynamic parameters were obtained using the retardation function method of three-dimensional frequency-domain potential flow theory.The results of the hydrodynamic analysis were highly consistent with the test findings,verifying the accuracy of the multifloating hydrodynamic coupling analysis,and key hydrodynamic parameters were solved for different water depths and the coupling effect.According to the obtained results,the hydrodynamic influence was the largest in shallow waters when the coupling effect was considered.Furthermore,the coupled motion equation combined with viscous damping,fender system,and mooring system was established,and the hydrodynamics,floating body motion,and dynamic response of the fender system were analyzed.Motion analysis revealed good agreement among the surge,sway,and yaw motions of the two floating bodies.However,when the wave period reached 10 s,the motion of the two floating bodies showed severe shock,and a relative motion was also observed.Therefore,excessive constraints should be added between the two floating bodies during construction to ensure construction safety.The numerical analysis and model test results of the semisubmersible platform and HYSY 229 barge at a water depth of 42 m and sea conditions of 0°,45°,and 90° were in good agreement,and the error was less than 5%.The maximum movement of the HYSY 229 barge reached 2.61 m in the sway direction,whereas that of the semisubmersible platform was 2.11 m.During construction,excessive constraints should be added between the two floating bodies to limit their relative movement and ensure construction safety. | DING Hongyan QIN Licheng ZHANG Puyang SONG Zhengrong XIE Weiwei | 2024 | Journal of Ocean University of China2024，23，2： | 0 |
| 8 | A CCA secure public key encryption scheme based on finite groups of Lie type显示文摘Dear editor,Lie groups have important applications in many branches of physics and mathematics,such as mathematical analysis,differential geometry,topology and quantum mechanics[1,2].As the important measure of algebraic properties of Lie groups,Lie algebras play an indispensable role while studying Lie groups. | Haibo HONG Jun SHAO Licheng WANG Mande XIE Guiyi WEI Yixian YANG Song HAN Jianhong LIN | 2022 | Science China(Information Sciences)2022，65，1： | 0 |
| 9 | Nano-silica modified lightweight and high-toughness carbon fiber/phenolic ablator with excellent thermal insulation and ablation performance显示文摘Lightweight and high-toughness carbon fiber/phenolic ablator(CFPA)is required as the Thermal Protection System(TPS)material of aerospace vehicles for next-generation space missions.To improve the ablative properties,silica sol with good particle size distribution prepared using tetramethoxysilane(TMOS)was blended with natural rubber latex and deposited onto carbon fiber felt,which was then integrated with phenolic aerogel matrix,introducing nano-silica into the framework of CFPA.The modified CFPA with a low density of 0.28—0.31 g/cm3exhibits strain-in-fracture as high as 31.2%and thermal conductivity as low as 0.054 W/(m·K).Furthermore,a trace amount of nano-silica could effectively protect CFPA from erosion of oxidizing atmosphere in different high-temperature environments.The oxyacetylene ablation test of 3000°C for 20 s shows a mass ablation rate of 0.0225 g/s,a linear ablation rate of 0.209 mm/s for the modified CFPA,which are 9.64%and 24.82%lower than the unmodified one.Besides,the long-time butane ablation test of 1200°C for 200 s shows an insignificant recession with mass and linear ablation rate of 0.079 g/s and 0.039 mm/s,16.84%and 13.33%lower than the unmodified one.Meanwhile,the fixed thermocouple in the test also demonstrates a good thermal insulation performance with a low peak back-face temperature of 207.7°C,12.25%lower than the unmodified one.Therefore,the nano-silica modified CFPA with excellent overall performance presents promising prospects in high-temperature aerospace applications. | Wenjie Xu Wenda Song Xianfeng Jia Cheng Ma Jitong Wang Wenming Qiao Licheng Ling | 2024 | Defence Technology(防务技术)2024，31，1： | 0 |
| 10 | Synchrophasor-based Online State Estimated in Large-scale Power Grid显示文摘With integration of a larger amount of clean power sources and power electronic equipment,operation and dynamic characteristics of the power grid are becoming more and more complicated and stochastic.Therefore,it is necessary and urgent to obtain accurate real-time states,which is difficult from traditional state estimation.This paper systematically develops a phasor measurement unit(PMU)based real-time state estimator for a realistic large-scale power grid for the first time.The estimator mainly relies on three refined algorithms,i.e.,an improved linear state estimation algorithm,a practical bad data identification method and a distributed topology check technique.Furthermore,a novel system architecture is designed and implemented for the China Southern Power Grid.Numerical simulations and extensive field operation results of the state estimator recorded under both normal and abnormal situations are presented.All the tests and field results demonstrate the advantages of the proposed algorithms in terms of online system monitoring and feasibility of refreshing the states of the whole system at intervals of tens of milliseconds. | Junjie Lin Chao Lu Wenchao Song Yingduo Han Yinsheng Su He Huang Licheng Li | 2023 | CSEE Journal of Power and Energy Systems2023，9，5： | 0 |
| 11 | Another Year of Record Heat for the Oceans显示文摘Changes in ocean heat content(OHC), salinity, and stratification provide critical indicators for changes in Earth’s energy and water cycles. These cycles have been profoundly altered due to the emission of greenhouse gasses and other anthropogenic substances by human activities, driving pervasive changes in Earth’s climate system. In 2022, the world’s oceans, as given by OHC, were again the hottest in the historical record and exceeded the previous 2021 record maximum.According to IAP/CAS data, the 0–2000 m OHC in 2022 exceeded that of 2021 by 10.9 ± 8.3 ZJ(1 Zetta Joules = 1021Joules);and according to NCEI/NOAA data, by 9.1 ± 8.7 ZJ. Among seven regions, four basins(the North Pacific, North Atlantic, the Mediterranean Sea, and southern oceans) recorded their highest OHC since the 1950s. The salinity-contrast index, a quantification of the “salty gets saltier–fresh gets fresher” pattern, also reached its highest level on record in 2022,implying continued amplification of the global hydrological cycle. Regional OHC and salinity changes in 2022 were dominated by a strong La Ni?a event. Global upper-ocean stratification continued its increasing trend and was among the top seven in 2022. | Lijing CHENG John ABRAHAM Kevin ETRENBERTH John FASULLO Tim BOYER Michael EMANN Jiang ZHU Fan WANG Ricardo LOCARNINI Yuanlong LI Bin ZHANG Fujiang YU Liying WAN Xingrong CHEN Licheng Feng Xiangzhou SONG Yulong LIU Franco RESEGHETTI Simona SIMONCELLI Viktor GOURETSKI Gengxin CHEN Alexey MISHONOV Jim REAGAN Guancheng LI | 2023 | Advances in Atmospheric Sciences2023，40，6： | 0 |
| 12 | Coexisting valley and pseudo-spin topological edge states in photonic topological insulators made of distorted Kekule lattices显示文摘Photonic topological insulators protected by the lattice spatial symmetry(e.g., inversion and rotation symmetry)mainly support single type edge state, interpreted by either valley or pseudo-spin. Here, we demonstrate theoretically, numerically, and experimentally that a type of judiciously designed two-dimensional Kekulé photonic crystal with time reversal symmetry can possess topological valley and pseudo-spin edge states in different frequency bands. Topologically robust transportation of both the valley and pseudo-spin edge states was confirmed by measuring the transmission of straight and z-shaped interface supported edge mode and comparing with bulk modes in the microwave frequency regime. In addition, we show that due to the distinct topological origins, valley and pseudo-spin edge states can be distinguished by examining their end-scattering into the free space. Our system provides an alternative way in manipulating electromagnetic waves with additional degree-of-freedom, which has potential applications for robust and high-capacity waveguiding and multi-mode dividing. | Guochao Wei Zhenzhen Liu Licheng Wang Jianyuan Song Jun-Jun Xiao | 2022 | Photonics Research2022，10，4： | 0 |
| 13 | Tibetan Multi-Dialect Speech Recognition Using Latent Regression Bayesian Network and End-To-End Mode显示文摘We proposed a method using latent regression Bayesian network (LRBN) toextract the shared speech feature for the input of end-to-end speech recognition model.The structure of LRBN is compact and its parameter learning is fast. Compared withConvolutional Neural Network, it has a simpler and understood structure and lessparameters to learn. Experimental results show that the advantage of hybridLRBN/Bidirectional Long Short-Term Memory-Connectionist Temporal Classificationarchitecture for Tibetan multi-dialect speech recognition, and demonstrate the LRBN ishelpful to differentiate among multiple language speech sets. | Yue Zhao Jianjian Yue Wei Song Xiaona Xu Xiali Li Licheng Wu Qiang Ji | 2019 | Journal on Internet of Things2019，1，1： | 0 |
| 14 | Characterization and evaluation of a femtosecond laser-induced osseointegration and an anti-inflammatory structure generated on a titanium alloy显示文摘Cell–material interactions during early osseointegration of the bone–implant interface are critical and involve crosstalk between osteoblasts and osteoclasts.The surface properties of titanium implants also play a critical role in cell–material interactions.In this study,femtosecond laser treatment and sandblasting were used to alter the surface morphology,roughness and wettability of a titanium alloy.Osteoblasts and osteoclasts were then cultured on the resulting titanium alloy disks.Four disk groups were tested:a polished titanium alloy(pTi)control;a hydrophilic micro-dislocation titanium alloy(sandblasted Ti(STi));a hydrophobic nano-mastoid Ti alloy(femtosecond laser-treated Ti(FTi));and a hydrophilic hierarchical hybrid micro-/nanostructured Ti alloy[femtosecond laser-treated and sandblasted Ti(FSTi)].The titanium surface treated by the femtosecond laser and sandblasting showed higher biomineralization activity and lower cytotoxicity in simulated body fluid and lactate dehydrogenase assays.Compared to the control surface,the multifunctional titanium surface induced a better cellular response in terms of proliferation,differentiation,mineralization and collagen secretion.Further investigation of macrophage polarization revealed that increased anti-inflammatory factor secretion and decreased proinflammatory factor secretion occurred in the early response of macrophages.Based on the above results,the synergistic effect of the surface properties produced an excellent cellular response at the bone–implant interface,which was mainly reflected by the promotion of early ossteointegration andmacrophage polarization. | Yang Liu Zhongying Rui Wei Cheng Licheng Song Yunqiang Xu Ruixin Li Xizheng Zhang | 2021 | Regenerative Biomaterials2021，8，2： | 0 |
| 15 | RTCB deficiency triggers colitis in mice by influencing the NF-κB and Wnt/β-catenin signaling pathways显示文摘RNA terminal phosphorylase B(RTCB)has been shown to play a significant role in multiple physiological processes.However,the specific role of RTCB in the mouse colon remains unclear.In this study,we employ a conditional knockout mouse model to investigate the effects of RTCB depletion on the colon and the potential molecular mechanisms.We assess the efficiency and phenotype of Rtcb knockout using PCR,western blot analysis,histological staining,and immunohistochemistry.Compared with the control mice,the Rtcb-knockout mice exhibit compromised colonic barrier integrity and prominent inflammatory cell infiltration.In the colonic tissues of Rtcbknockout mice,the protein levels of TNF-α,IL-8,and p-p65 are increased,whereas the levels of IKKβand IκBαare decreased.Moreover,the level of GSK3βis increased,whereas the levels of Wnt3a,β-catenin,and LGR5 are decreased.Collectively,our findings unveil a close association between RTCB and colonic tissue homeostasis and demonstrate that RTCB deficiency can lead to dysregulation of both the NF-κB and Wnt/β-catenin signaling pathways in colonic cells. | Peiyan Liu Ruitao Zhang Xiaotong Song Xiaohua Tian Yichao Guan Licheng Li Mei He Chengqiang He Naizheng Ding | 2024 | Acta Biochimica et Biophysica Sinica2024，56，3： | 0 |
| 16 | Studies on Functionally Substituted n5-Cyclopentadienyl Transition-Metal Compounds --Synthesis and Crystal Structure of η5-CH3COC5H4W(CO)3CH2C5H5显示文摘Reaction of benzyl chloride with η5-CH3COC5H4W(CO)2Na formed in situ from η6-CH3CO C6H4Na and W(CO)2 gives η6-CH3COC6H4W(CO)3CH2C5H5.The single crystal structure of the product was determined by X-ray diffraction method. It crystallizes in the triclinlc space group P1 with unit cell parameters a= 10.199(5),b=12.116(7), c=14.207(6)A;a=69.47(5),β=72. 38(3),γ= 85.89(4);V= 1569. 9A3, Dc= 1.98 g/cm2; Z=4. Least-square refinement led to final R value of 0. 0539 and Rw value of 0. 0553, based on 3548 independent observed reflections. | Song Licheng , Yang Hua and Hu Qingmei (Department of Chemistry, Nankai University, Tianjin)Zhou Zhongyuan (Chengdu Center of Analysis and. Determination, Academia Sinica, Chengdo) | 1990 | Chemical Research in Chinese Universities1990，6，1： | 0 |
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