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| 1 | Inverse design of digital nanophotonic devices using the adjoint method显示文摘A high-efficiency inverse design of'digital'subwavelength nanophotonic devices using the adjoint method is proposed.We design a single-mode 3dB power divider and a dual-mode demultiplexer to demonstrate the efficiency of the proposed inverse design approach,called the digitized adjoint method,for single-and dual-object optimization,respectively.The optimization comprises three stages:1)continuous variation for an'analog'pattern;2)forced permittivity biasing for a'quasi-digital'pattern;and 3)a multilevel digital pattern.Compared with the conventional brute-force method,the proposed method can improve design efficiency by about five times,and the performance optimization can reach approximately the same level.The method takes advantages of adjoint sensitivity analysis and digital subwavelength structure and creates a new way for the efficient and high-performance design of compact digital subwavelength nanophotonic devices,which could overcome the efficiency bottleneck of the brute-force method,which is restricted by the number of pixels of a digital pattern,and improve the device performance by extending a conventional binary pattern to a multilevel one. | KAIYUAN WANG XINSHU REN WEIJIE CHANG LONGHUI LU DEMING LIU MINMING ZHANG | 2020 | Photonics Research2020，8，4： | 7 |
| 2 | Optical meta-waveguides for integrated photonics and beyond显示文摘The growing maturity of nanofabrication has ushered massive sophisticated optical structures available on a photonic chip.The integration of subwavelength-structured metasurfaces and metamaterials on the canonical building block of optical waveguides is gradually reshaping the landscape of photonic integrated circuits,giving rise to numerous metawaveguides with unprecedented strength in controlling guided electromagnetic waves.Here,we review recent advances in meta-structured waveguides that synergize various functional subwavelength photonic architectures with diverse waveguide platforms,such as dielectric or plasmonic waveguides and optical fibers.Foundational results and representative applications are comprehensively summarized.Brief physical models with explicit design tutorials,either physical intuition-based design methods or computer algorithms-based inverse designs,are cataloged as well.We highlight how meta-optics can infuse new degrees of freedom to waveguide-based devices and systems,by enhancing light-matter interaction strength to drastically boost device performance,or offering a versatile designer media for manipulating light in nanoscale to enable novel functionalities.We further discuss current challenges and outline emerging opportunities of this vibrant field for various applications in photonic integrated circuits,biomedical sensing,artificial intelligence and beyond. | Yuan Meng Yizhen Chen Longhui Lu Yimin Ding Andrea Cusano Jonathan A.Fan Qiaomu Hu Kaiyuan Wang Zhenwei Xie Zhoutian Liu Yuanmu Yang Qiang Liu Mali Gong Qirong Xiao Shulin Sun Minming Zhang Xiaocong Yuan Xingjie Ni | 2021 | Light(Science & Applications)2021，10，12： | 6 |
| 3 | Wearable CNT/Ti_(3)C_(2)T_(x)MXene/PDMS composite strain sensor with enhanced stability for real-time human healthcare monitoring显示文摘Strain sensors with good stability are vital to the development of wearable healthcare monitoring systems.However,the design of strain sensor with both duration stability and environmental stability is still a challenge.In this work,we propose an ultra-stable and washable strain sensor by embedding a coupled composite film of carbon nanotube(CNT)and Ti_(3)C_(2)T_(x) MXene into polydimethylsiloxane(PDMS)matrix.The composite strain sensor with embedded microstructure and uneven surface makes it conformal to skin,while the CNT/MXene sensing layer exhibits a resistance sensitive to strain.This sensor shows reliable responses at different frequencies and with long-term cycling durability(over 1,000 cycles).Meanwhile,the CNT/MXene/PDMS composite strain sensor provides the advantages of superior anti-interference to temperature change and water washing.The results demonstrate less than 10%resistance changes as the temperature rises from-20 to 80℃or after sonication in water for 120 min,respectively.The composite sensor is applied to monitor human joint motions,such as bending of finger,wrist and elbow.Moreover,the simultaneous monitoring of the electrocardiogram(ECG)signal and joint movement while riding a sports bicycle is demonstrated,enabling the great potential of the as-fabricated sensor in real-time human healthcare monitoring. | Xiaowen Xu Yucheng Chen Pei He Song Wang Kai Ling Longhui Liu Pengfei Lei Xianjun Huang Hu Zhao Jianyun Cao Junliang Yang | 2021 | Nano Research2021，14，8： | 5 |
| 4 | A new method for evaluating the oil mobility based on the relationship between pore structure and state of oil显示文摘An accurate evaluation of the shale oil mobility is crucial to its cost-effective exploitation.This study presents a method to assess shale oil mobility by integrating the pore structure and oil states distributions.First,a set of three discrete organic extracts(EOM-A,B and C)were obtained by sequential extraction.The relationships among the EOMs and the oil states were inferred from the group compositions and fluorescence properties of the produced shale oil(free state).The results showed that EOMs A and B represent free oil in the open and closed pores,respectively,while the EOM-C represents adsorbed oil.Then,NMR T_(1)-T_(2)map is used to determine the T_(2-cutoff)values that indicate the pore size ranges of different oil states.Free oil resides mainly in larger pore space(T_(2)>0.5 ms),while the adsorbed oil in smaller pore space(0.2 ms0.5 and T_(2-cutoff)>1.0 ms suggest that the free oil in connected pores has the highest mobility.This work can provide a reference for evaluating the shale oil potential and prospectivity in other regions. | Longhui Bai Bo Liu Xiaofei Fu Qinhong Hu Qiuli Huo Liu Wang Qiming Wang Li FuMehdi Ostadhassan | 2023 | Geoscience Frontiers2023，14，6： | 2 |
| 5 | Microscopic and Fractal Characterization of Organic Matter within Lacustrine Shale Reservoirs in the First Member of Cretaceous Qingshankou Formation,Songliao Basin,Northeast China显示文摘Understanding the occurrences of different fractions of organic matter in shale reservoirs is very important for the evaluation of shale oil.Lacustrine organic-rich shale samples from the first member of the Cretaceous Qingshankou Formation in the Songliao Basin were analyzed with confocal laser scanning microscopy(CLSM)and fluorescence spectral analysis.The results show that the occurrences of different organic components are related to the fabric of samples and vary with depth.The bulk content of light components is significantly higher than heavy components and exhibits a positive relationship with quartz and feldspar contents.Both light and heavy components are distributed parallel with the lamination in microscopic view in laminated samples,and randomly in massive samples.The maximum radius of light components in most of the samples is larger than 20μm,while it is smaller for heavy components,indicating the micro fractionation from clay/organic lamina to quartz/feldspar lamina.The depth of enrichment of light components corresponds to the oil maturity of organic matter.Both the distribution of light and heavy components fits the same fractal model,with fractal dimensions ranging between 2.2 and 2.5.The CLSM results confirm that it can be a reliable tool for the'sweet spot'exploration. | Bo Liu Meng Yan Xianda Sun Yunfeng Bai Longhui Bai Xiaofei Fu | 2020 | Journal of Earth Science2020，31，6： | 2 |
| 6 | Predicting protein secondary structure by a support vector machine based on a new cod ing scheme显示文摘 | Wang Longhui Liu Juan Li Yanfu | 2004 | Genome Informatics2004，15，2： | 1 |
| 7 | Polymorph and morphology control of CaCO3 via temperature and PEG during the decomposition of Ca(HCO3)2 显示文摘 | Jiang Jiuxin Ye Jiuzhou Zhang Gaowen Gong Xinghou Nie Longhui Liu Jianing | 2012 | Journal of the American Ceramic Society2012，95，12： | 1 |
| 8 | Morphological, crystalline, thermal and physicochemical properties of cellulose nanocrystals obtained from sweet potato residue显示文摘 | Hongjia Lu Yu Gui Longhui Zheng Xiong Liu | 2013 | Food Research International2013，，1： | 1 |
| 9 | Differences in hydrocarbon composition of shale oils in different phase states from the Qingshankou Formation, Songliao Basin, as determined from fluorescence experiments显示文摘The phase state of shale oil has a significant impact on its mobility.The mineral and organic matter in shale reservoirs play an important role in oil phase.This study attempts to evaluate the properties of shale oils in different phase states and to investigate how these differences are related to initial shale composition.Samples from the first member of the Qingshankou(Q1)Formation were analyzed using X-ray diffraction,total organic carbon content,rock pyrolysis solvent extraction and group component separation.Subsequently,fluorescence techniques were used to quantitatively determine the content and properties of the free oil(FO),the adsorbed oil associated with carbonate(ACO),and the adsorbed oil associated with silicate and clay-organic complexes(AKO).The results showed that non-hydrocarbons and asphaltenes are the primary fluorescing compounds on shale grain.FO is the dominant phase in the Q1 Formation.The quantitative grain fluorescence on extraction(QGF-E)and total scanning fluorescence(TSF)spectra of ACO and AKO show a significant redshift compared to the FO.The TSF spectra of FO have a characteristic skew to the left and a single peak distribution,suggesting a relatively light hydrocarbon component.The TSF spectra of ACO show a skew to the right and an even,double-peaked distribution.The TSF spectra of AKO show a single peak with a skew to the right,indicating that ACO and AKO hydrocarbons are heavier than FO hydrocarbons.In summary,enrichment of carbonate minerals in shale may result in mis-identification of“sweet spots”when using QGF.The normalized fluorescence intensity of QGF-E and TSF are effective indexes allowing oil content evaluation.As an additional complicating factor,hydrocarbon fractionation occurs during generation and expulsion,leading to a differentiation of oil composition.And FO has high relatively light hydrocarbon content and the strongest fluidity. | Longhui BAI Bo LIU Jianguo YANG Shansi TIAN Boyang WANG Saipeng HUANG | 2021 | Frontiers of Earth Science2021，15，2： | 1 |
| 10 | Spherical cationic polymer networks with porphyrin photosensitizer for sustainable and efficient photocatalysis显示文摘The continuous and sustainable photo-activity on micro-or nano-carriers has always been a key stepping stone in the industrialization of photo-catalysis,photo-synthesis,and photo-degradation.Herein,we report a new series of positively charged hollow microspheres carrying porphyrin moieties.Such hollow spheres are formed through crosslinking of well-ordered porous thin laminates,initiated by co-assembly of regular monomers and those decorated with porphyrin moieties.On the surface of an individual sphere,densely distributed positive sites attract anionic reactants.The superficial porphyrin decomposes the accumulated reactants under 1 Sun.After degradation and release of products,the photoactive sites are thereby renewed.We demonstrate that polymer network(1:10)exhibited superior sustainable photocatalytic performance with complete degradation of methyl orange(MO)in 40 min with no observable performance deterioration after six cycles.The established close loop of adsorption-reaction-release cycle makes possible many efficient and continuous photo-catalytic processes. | Lingling Zhang Liwei Wu Junhui Bao Longhui Li Zejun Liu Feng Bai Jie Ju Xi Yao | 2024 | Nano Research2024，17，5： | 0 |
| 11 | Improved creep aging response in Al-Cu alloy by applying pre-aging before pre-straining显示文摘The improvement of post-form properties without compromising creep formability has been a critical issue in creep age forming of aluminum alloy component. A pretreatment process incorporating artificial pre-aging at 165 °C for 6 h/12 h/24 h followed by pre-strain(3%–9%)has been developed. This method not only evidently improves the strength but also accelerates the creep deformation during creep aging of an Al-Cu alloy. A strength increase of 50 MPa with a slight decrease of ductility relative to the 9% pre-strained alloy is acquired in the alloy artificially pre-aged for 24 h regardless of the pre-strain level(3%–9%). Artificial aging for 24 h prior to 3%pre-strain enables an increase of creep strain by 30%. The creep strain in the alloy artificially preaged for 24 h and pre-strained by 6% is comparable to that in the alloy pre-strained by 9%. The strength and ductility in the alloy artificially pre-aged for 6 h/12 h and pre-strained by 3% are even slightly higher than those in the alloy purely pre-strained by 9%. The characterizations by transmission electron microscopy reveal that pre-aging at 165 °C could promote the accumulation of dislocations during pre-straining due to the pinning effect of pre-existing Guinier-Preston zones(GP zones)/θ’’phases and thus expedite the creep deformation in respect to the pure pre-straining treatment. The enhanced precipitation of θ’phases at these pinned dislocations contributes to the improved strength after creep aging. The results demonstrate applying artificial pre-aging before pre-straining is an efficient strategy to elevate the creep aging response in Al alloys. | Fangpu LYU Chunhui LIU Peipei MA Jianshi YANG Longhui CHEN Lihua ZHAN Minghui HUANG | 2023 | Chinese Journal of Aeronautics2023，36，7： | 0 |
| 12 | Design and discovery of a highly potent ultralong-acting GLP-1 and glucagon co-agonist for attenuating renal fibrosis显示文摘The role of co-agonists of glucagon-like peptide-1 receptor(GLP-1R)and glucagon receptor(GCGR)in chronic kidney disease(CKD)remains unclear.Herein we found that GLP-1R and GCGR expression levels were lower in the kidneys of mice with CKD compared to healthy mice and were correlated with disease severity.Interestingly,GLP-1R or GCGR knockdown aggravated the progression of kidney injury in both diabetic db/db mice and non-diabetic mice undergoing unilateral ureteral obstruction(UUO).Based on the importance of GLP-1R and GCGR in CKD,we reported a novel monomeric peptide,1907-B,with dual-agonism on both GLP-1R and GCGR.The data confirmed that 1907-B had a longer half-life than long-acting semaglutide in rats or cynomolgus monkeys(~2-3 fold)and exhibited better therapeutic contribution to CKD than best-in-class monoagonists,semaglutide,or glucagon,in db/db mice and UUO mice.Various lock-of-function models,including selective pharmacological activation and genetic knockdown,confirmed that 1907-B’s effects on ameliorating diabetic nephropathy in db/db mice,as well as inhibiting kidney fibrosis in UUO mice,were mediated through GLP-1 and glucagon signaling.These findings highlight that 1907-B,a novel GLP-1R and GCGR co-agonist,exerts multifactorial improvement in kidney injuries and is an effective and promising therapeutic option for CKD treatment. | Qian Zhao Jiale Dong Han Liu Hui Chen Huan Yu Shuyin Ye Shuangjin Yu Yu Li Longhui Qiu Nazi Song Hongjiao Xu Qi Liu Zhiteng Luo Yuyi Li Rui Wang Guodong Chen Xianxing Jiang | 2024 | Acta Pharmaceutica Sinica B2024，14，3： | 0 |
| 13 | 通过^(1)H(^(15)O,p)^(15)O弹性散射来研究^(16)F的能级性质显示文摘The understanding of open quantum systems in unbound nuclei is a challenge to the nuclear structure research[1].The continuum coupling effect may lead to a reordering of the shells in such systems[2].A way to study this effect is to compare the level schemes of two mirror nuclei involving an unbound and a bound nucleus such as 16F and 16N[3].Here we report an experiment of studying the level properties of 16F using the resonant elastic scattering with an 15O radioactive beam delivered by the Radioactive Ion Beam Line at Lanzhou(RIBLL)[4]. | Ru Longhui Hu Jun Liu Enqiang Bai Zhen Duan Fangfang Fang Xiao Hou Suqing Hu Qiang Ji Liancheng Jin Shuya Li Kuoang Li Yiyang Li Ruojie Ma Peng Ma Junbing Sun Xinxin Shi Guozhu Tang Xiaodong Wang Xinyu Wang Jiansong Wang Yufeng Wu Jiatong Xu Xiaodong Xu Shiwei Xin Wenyu Yang Kaiping Yang Yanyun NMichel | 2018 | IMP & HIRFL Annual Report2018，，1： | 0 |
| 14 | Measurement of^(25)Al+p Resonant Scattering显示文摘Type I X-ray bursts are the most frequently observed thermonuclear explosions in nature[1].They take place on the surface of accreting neutron star in low-mass X-ray binary systems. | Hu Jun H.Yamaguchi Xu Shiwei Zhang Ningtao Ma Shaobo Ru Longhui Liu Enqiang Liu Tong S.Hayakawa Yang Lei H.Shimizu D.Kahl C.B.Hamill A.Murphy Su Jun Fang Xiao K.Chae M.Kwag S.Cha N.N.Duy N.K.Uyen D.Kim R.G.Pizzone M.La Cognata S.Cherubini S.Romano A.Tumino J.Liang A.Psaltis M.Sferrazza D.Kim S.Kubono | 2019 | IMP & HIRFL Annual Report2019，，1： | 0 |
| 15 | On-chip reconfigurable mode converter based on cross-connected subwavelength Y-junctions显示文摘A novel power-efficient reconfigurable mode converter is proposed and experimentally demonstrated based on cross-connected symmetric Y-junctions assisted by thermo-optic phase shifters on a silicon-on-insulator platform.Instead of using conventional Y-junctions,subwavelength symmetric Y-junctions are utilized to enhance the mode splitting ability.The reconfigurable functionality can be realized by controlling the induced phase differences.Benefited from the cross-connected scheme,the number of heating electrodes can be effectively reduced,while the performance of the device is maintained.With only one-step etching,our fabricated device shows the average insertion losses and cross talks are less than 2.45 and-16.6 d B,respectively,measured with conversions between two arbitrary compositions of the first four TE modes over an observable 60 nm bandwidth.The converter is switchable and CMOS-compatible,and could be extended for more modes;hence,it can be potentially deployed for advanced and flexible mode multiplexing optical networks-on-chip. | LONGHUI LU DEMING LIU MAX YAN MINMING ZHANG | 2021 | Photonics Research2021，9，1： | 0 |
| 16 | Geographical variation of the acoustic signals in the spot-legged treefrog (Polypedates megacephalus) of Hainan Island显示文摘Geographical divergence in acoustic signals is often affected by multiple selective pressures.Environmental factors are expected to shape signals by adjusting for greater propagation efficiency.Nevertheless,such habitat-driven hypotheses have not been well-examined with multi-signal and multi-habitat types included simultaneously.In this study,we evaluated call similarity of the spot-legged treefrog(Polypedates megacephalus),characterized by multiple call types,from 11 geographic populations across Hainan Island.We also examined multiple factors(i.e.body mass,temperature,altitude,and vegetation)among different acoustical geographic clusters,and tested whether the variation in acoustic length and frequency among different habitats was in accordance with the predic-tion derived from the acoustic adaptation hypothesis.We showed that P.megacephalus from Hainan Island included 3 acoustic geographic clusters:the northeasternflatlands,the southwest mountains,and the hills around the moun-tains.We also showed that environmental factors(i.e.altitude and vegetation)varied across these 3 acoustically distinct areas.Moreover,the duration of the different call types supported the hypothesis that they should have opti-mal transmission in their own habitats.Thus,our results reveal the roles of ecological selection in the geographical divergence of anuran acoustic signals. | Longhui ZHAO Qiucheng LIU Yuanyu QIN Xiaofei ZHAI Feiyun TU Tongliang WANG Jichao WANG | 2023 | Integrative Zoology2023，18，4： | 0 |
| 17 | Identification, evolution and geological indications of solid bitumen in shales: A case study of the first member of Cretaceous Qingshankou Formation in Songliao Basin, NE China显示文摘On the basis of sorting out current understanding of solid bitumen (SB) in shales and taking organic-rich shales in the first member of the Cretaceous Qingshankou Formation in the Songliao Basin as an example, the definition, classification, occurrence and evolution path of SB are systemtically studied, and the indicative significance of SB reflectance (Rob) on maturity and its influence on the development of reservoir space are discussed and summarized. The results show that the difference of primary maceral types is primarily responsible for the different evolution paths of SB. Most of the pre-oil bitumen is in-situ SB with only a small amount being of migrated SB, while most of the post-oil bitumen and pyrobitumen are migrated SB. From the immature to early oil maturity stage, bituminite, vitrinite, and inertinite can be distinguished from SB based on their optical characteristics under reflected light, and alginite can be differentiated from SB by their fluorescence characteristics. Under scanning electron microscope, in-situ SB and migrated SB can be effectively identified. Rob increases linearly with increasing vitrinite reflectance (Ro), as a result of a decrease of aliphatic structure and the enhancement of aromatization of SB. Within the oil window three types of secondary pores may develop in SB, including modified mineral pores, devolatilization cracks and bubble holes. At a high maturity stage spongy pores may develop in pyrobitumen. Scanning electron microscopy combined with in-situ SEM-Raman spectroscopy can further reveal the structral information of different types of SB, thus providing crucial data for understanding for understanding OM migration paths, dynamics, and distances at micro-scale. | LIU Bo WANG Liu FU Xiaofei HUO Qiuli BAI Longhui LYU Jiancai WANG Boyang | 2023 | Petroleum Exploration and Development2023，50，6： | 0 |
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