Jie Li

Jie Li
Xishuangbanna Tropical Botanical Garden · Center for Integrative Conservation (CIC)

Ph.D

About

1,487
Publications
252,185
Reads
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26,066
Citations
Citations since 2016
472 Research Items
17597 Citations
201620172018201920202021202205001,0001,5002,0002,5003,000
201620172018201920202021202205001,0001,5002,0002,5003,000
201620172018201920202021202205001,0001,5002,0002,5003,000
201620172018201920202021202205001,0001,5002,0002,5003,000
Additional affiliations
May 2001 - present
Xishuangbanna Tropical Botanical Garden (XTBG), Chinese Academy of Sciences (CAS)
Position
  • PI of Plant Phylogenetics & Conservation

Publications

Publications (1,487)
Article
Full-text available
This paper explores the control of lamellar orientation in α-solidified TiAl alloy by anti-gravity investment casting. The macrostructures and microstructures in iso-section plate and variable-section blade have been investigated in detail. The results show that the macrostructures of both plate and blade body consist of a number of columnar crysta...
Article
In this study, commercial Inconel 625 superalloy was subjected to solution and longer-term aged treatment. The effects of the temperature and time of aged treatment on the secondary-phase evolutions, tensile properties, and strengthening mechanism of Inconel 625 superalloy were systematically investigated. The results showed that the evolution of M...
Article
Long-term continuous hourly measurements of ambient volatile organic compounds (VOCs) are scarce at the regional scale. In this study, a one-year hourly measurement campaign of VOCs was performed in Lvliang, Linfen, and Yuncheng in the heavily polluted Fenhe Plain region in China. The VOC average (±standard deviation, std) concentrations in Lvliang...
Article
Air quality in Beijing-Tianjin-Hebei and its surrounding regions has been significantly improved during the Three-Year Action Plan for Winning the Battle Against Air Pollution from 2018 to 2020. The PM2.5 concentration can be significantly influenced by meteorological conditions, and the effectiveness of anthropogenic emissions reduction on PM2.5 o...
Article
In this work, a modulated structure composed of nano-scale Ti2AlNb (O phase) and α2 phase was obtained in middle Nb γ-TiAl alloy. The O phase nucleates at the α2/γ interface and is orthogonal to the α2/γ interface. The creep testing results show that the modulated structure exhibited the better creep performance compared with the fully lamellar mic...
Article
Identifying climatic refugia is important for long-term conservation planning under climate change. Riparian areas have the potential to provide climatic refugia for wildlife, but literature remains limited, especially for plants. This study was conducted with the purpose of identifying climatic refugia of plant biodiversity in the portion of the M...
Article
The reasonable design and application of phase transformation is an efficient approach to coordinate the microstructure and properties of alloys. The sequence of compositional and structural transformation determines the type and mechanism of phase transformation. Because of their low density and excellent high-temperature properties, TiAl alloys t...
Article
The recrystallization behaviors of TiAl alloy play major roles in the microstructure control during the thermal-mechanical treatment, affected intensively by alloy composition. Hence, the effect of alloy elements (Cr, Mn, V, Nb) on the recrystallization of Ti-47Al-1.5Re-X alloy was investigated by thermal simulation compression. Cr and V could incr...
Article
Ti–43Al–4Nb–1Mo-0.2B (at.%) (TNM) alloy sheets were fabricated, and the corresponding microstructure developed from lamellar to duplex structure with the rolling reduction increased from 50% to 72.5%. Interestingly, novel Z-type lamellar structure developed at 67.5% deformation strain and the formation process was discussed by calculating of the Sc...
Article
The moiré superlattices (MSL) of twist two-dimensional van der Waals heterointerfaces accompanying with interfacial lattice distortion present abundant attractive physical properties, including fast interlayer charge-transfer, superconductor-insulator transition, emerging topological phase. Attributing to the optimized atomic lateral forces and eli...
Article
Dwell fatigue failure of titanium alloy components has been one of the major threats to aircraft safety for the last 50 years. Numerous studies have focused on the identification of critical microstructural configurations, such as microtextured regions, rogue grain pairs and (0001) twist grain boundaries. In this work, a microstructure with a low p...
Article
Fireworks are widely used in celebrations worldwide. The effects of fireworks on the physicochemical characteristics of atmospheric particles are well documented. However, the influence of firework burning on ambient volatile organic compound (VOC) emissions remains unclear. To determine the impact of firework-burning events on VOC emissions, ambie...
Article
The uncertainty in the quantitative estimates of long-range transport of pollutants in air quality models is large. In this study, based on the Global Nested Air Quality Prediction Modeling System (GNAQPMS-SM), using Latin hypercube sampling (LHS) method, we conducted a base simulation and an ensemble of 1° × 1° simulations in April 2017 to assess...
Article
TiAl alloy is a potential candidate structural material for lightweight and high temperature in aerospace, and multi-pass thermo-mechanical treatment, where dynamic recrystallization (DRX), static recrystallization (SRX), and post-dynamic recrystallization (PDRX) have significant effects on microstructure evolution, is commonly applied for microstr...
Article
The decomposition of (α2/γ) lamellae during service is an important microstructure degradation phenomenon that is worth studying. In this study, the decomposition mechanism of (α2/γ) lamellae was systematically investigated by transmission electron microscopy (TEM) and high-angle annular dark-field scanning transmission electron microscopy (HAADF-S...
Article
Full-text available
The stratospheric contribution to tropospheric ozone has long been a topic of much debate over the past few decades. In this study, we leveraged multiple datasets from surface, sounding and satellite observations to reanalysis datasets, along with a global chemical transport model (Global Nested Air Quality Prediction Modelling System, GNAQPMS) to...
Article
Alloys with a lamellar structure exhibit excellent mechanical properties as a large number of interfaces hinder dislocation motion. Here, an ultra-strong Al13Fe29Co29Ni29 high-entropy alloy (HEA) reinforced by a pearlite-like lamellar structure is studied. The results show that the Al13Fe29Co29Ni29 alloy decomposes into submicron lamellar (face-cen...
Article
Ti-44.5Al-3.8Nb-1Mo-0.2B alloy (TNM) sheets were prepared by hot rolling, and the effect of initial microstructure on the process was discussed in this work. The as-received TNM alloy billets with nearly and fully lamellar structures were prepared by forging and casting processes (named M1 and M2), respectively. For the as-rolled sheets from M1, th...
Article
In micro-scaled plastic deformation process such as micro-forming, material size effect is challenging to investigate and reveal using traditional material models. Since high-temperature titanium alloys have become the critical materials of micro-parts depending on outstanding mechanical properties, studying the effect of texture and silicide preci...
Article
The simultaneous optimization of competing properties is a challenge of machine learning based materials design. We proposed a domain knowledge constrained active learning loop for the design of high entropy alloys with optimized strength and ductility, by narrowing down the unexplored space using the valence electron concentration criterion. The a...
Article
A strategy to quantify the second phase strengthening of α precipitates in titanium alloys is proposed to predict the mechanical performance through crystal plasticity finite element (CPFE) models. Considering the different dominant features of equiaxed and lamellar microstructures, statistical and microstructural factors are introduced to describe...
Article
Systematic understanding on the magnetic field intensity dependent microstructure evolution and recrystallization behavior in a Co-B eutectic alloy under a constant undercooling (∆T≈100 K) were carried out. Absent of the magnetic field, the comparable size of divorced FCC-Co and Co3B eutectic ellipsoidal grains coexist with a few regular lamellas....
Article
Full-text available
Engelhardia a genus of Juglandaceae (the walnut family), is endemic to tropical and subtropical Asia. The rich Cenozoic fossil records and distinctive morphological characters of the living plants have been used to explore the evolutionary history and geographic distribution of Juglandaceae. However, the taxonomy of this genus has been suffered fro...
Article
Full-text available
Ti-4Al-5Mo-5V-5Cr-1Nb (wt.%) is a new type of high-strength (~1300 MPa) titanium (Ti) alloy developed for aerospace applications. Until now, the research on its welding and subsequent heat treatment is barren. Herein, we employed electron beam welding (EBW) to a solutionized Ti-4Al-5Mo-5V-5Cr-1Nb with a phase constituent of α + β and investigated i...
Article
Full-text available
The global atmospheric chemical transport model has become a key technology for air quality forecast and management. However, precise and rapid air quality simulations and forecast are frequently limited by the model’s computational performance. The gas-phase chemistry module is the most time-consuming module in air quality models because its tradi...
Article
Full-text available
Trigonobalanus doichangensis is a rare and endangered species with important evolutionary value and extremely small populations. We investigated the genetic diversity of T. doichangensis to provide information on its effective preservation. We used genotyping-by-sequencing (GBS) technology to assess the genetic diversity, genetic structure and gene...
Article
The anisotropy of the mechanical properties of high-performance titanium-alloy plates has always been a key challenge in the fabrication of alloy plates and the application of components in service. In this work, the room-temperature creep behavior and microstructural crystallography of Ti6321 alloy plates along the rolling direction (RD), 45°, and...
Article
Refractory black carbon (rBC) aerosols in the atmosphere play a significant role in climate systems due to their strong ability to absorb solar radiation. The lifetime of rBC depends on atmospheric transport, aging and consequently on wet scavenging processes (in-cloud and below-cloud scavenging). In this study, sequential rainwater samples in eigh...
Article
Full-text available
Global climate change has become a major threat to biodiversity, posing severe challenges to species conservation. This is particularly true for species such as Horsfieldia tetratepala that have extremely small populations in the wild. Little is known about the species distribution of H. tetratepala in the current climate, as well as how that will...
Article
Full-text available
Phylogenies are crucial for understanding historical patterns of genetic biodiversity, but very few are incorporated practically into existing conservation programs. Xishuangbanna, a tropical–subtropical forest transition, is a key biodiversity hotspot in Southwest of China; however, gaps between practical protection and national planning need to b...
Article
Mill products, such as sheets, usually show obvious anisotropy in their mechanical properties, which greatly affects both their applications and workability. In this study, the orientation-dependent tensile and creep behaviors of Inconel 625 alloy sheets with weak local textures were systematically investigated at 650℃. The results showed that Inco...
Article
Full-text available
Cold dwell fatigue of titanium alloys used in aero-engine components has threatened flight safety for over five decades. This phenomenon was encountered in Al-containing titanium alloys, occurring at relatively low temperatures, where load hold at applied peak stress result in reduction in number of cycles by an order of magnitude or more (the so-c...
Article
The precipitation hardening high-entropy alloys (HEAs) have attracted extensive research interest for their enhanced strength yet considerable ductility. In this study, the Al0.5CoCrFeNi HEA strengthened by nanoscale B2 phases was obtained after aging at temperature of 800 °C – 900 °C. The evolution of the B2 precipitation and the mechanical proper...
Article
In comparison with ordinary alloys, it is well-known that the high temperature flow curves of lamellar TiAl alloys generally exhibit pronounced flow softening and sharp stress peak. In order to clarify the origin of the abnormal flow behavior, in this study a Ti-43.5Al–8Nb-0.2W-0.2B alloy with refined fully lamellar microstructure was isothermally...
Article
Atmospheric trace metals are a key component of particulate matter and significantly influence the atmospheric process and human health. The dissolved fraction of trace metals represents their bioavailability and exhibits high chemical activity. However, the optimum measurement method for detecting the soluble fraction of trace metals is still unde...
Article
The expected excellent lubricant effect of graphene in metals during friction and wear is rarely achieved because of the difficulty in synthesizing suitable interfaces. Particularly, the situation is more challenging in titanium (Ti) matrix composites (TMCs) because of the high chemical-interface-reaction tendency between graphene and Ti during com...
Article
Full-text available
HONO concentrations in Beijing (BJ) and Sanmenxia (SMX) were simultaneously measured in winter with a duration of 1 month, and the sources and sinks of HONO in the two cities were comparably analyzed. BJ and SMX had different pollution characteristics. Direct vehicle emission made a contribution to observed HONO of about 28% in BJ, whereas it contr...
Article
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Interfacial β0 phase strengthening on the creep properties of TNM alloy has been investigated. The initial fully lamellar microstructure with fine-dispersed interfacial β0 phase was fabricated by powder hot isostatic pressing (P-HIP) and then carried out ageing treatment. The results indicated that the aged condition presented better microstructura...
Article
Cross-boundary transport of air pollution is a difficult issue in pollution control for the North China Plain. In this study, an industrial district (Shahe City) with a large glass manufacturing sector was investigated to clarify the relative contribution of fine particulate matter (PM2.5) to the city's high levels of pollution. The Nest Air Qualit...
Article
Recently, ozone (O3) pollution has become a significant problem for Beijing owing to its high traffic volume. To improve the simulation of street-scale nitrogen oxides (NOx) and O3, an integrated air quality modeling system coupling regional urban/street (IAQMS-street) was developed for Beijing. A weather research and forecasting atmospheric model,...
Article
The Fenwei Plain (FWP) continues to be one of the most polluted regions in China despite the improvement of air quality in recent years. However, our understanding of aerosol optical properties (AOP) and its relationship with aerosol composition particularly in cold season is far from complete. Here we conducted three-month measurements of AOP from...
Article
Full-text available
Microstructure degradation of a fully lamellar TNM alloy during creep has been investigated by using the quasi-in-situ creep tests, which were conducted at 750 °C under 250 MPa, for (1-5.4) % creep strain. The results indicated that the fully lamellar structure exhibited gradual microstructure degradation during creep. At the primary creep region,...
Article
The microstructure evolution and properties of CoCrCuFe1.5Ni0.5 high-entropy alloy solidified at different undercoolings (ΔT) have been investigated by using cyclic superheating technique. Results show that this alloy exhibits typical liquid phase separation (LPS) behavior and the core-shell structure can be attained at tiny undercooling, e.g., ΔT=...
Article
With the implementation of clean coal policy in China, the chunk coal has been gradually replaced by honeycomb briquette in domestic energies. In this study, the molecular composition of fine particles (PM2.5) from chunk coal and honeycomb briquette combustion is characterized using the Fourier transform-ion cyclotron resonance mass spectrometry (F...
Article
The search for ferroelectrics with optimized electrocaloric effects is often hindered due to the large compositional space and lack of reliable property data. Phenomenological theory, such as the Landau approach, then becomes useful, provided such models can be reliably parametrized with experimental data. We propose an approach in which we combine...
Article
Full-text available
The precipitation behavior and microstructural evolution of α phase in a novel metastable β-type Ti alloy, Ti-10Mo-6Zr-4Sn-3Nb (wt.%), during isothermal compression are investigated in this study through the use of SEM (scanning electron microscope), TEM (transmission electron microscope) (HRTEM) (high-resolution transmission electron microscopy) a...
Article
Full-text available
The latitudinal diversity gradient (LDG) is one of the most extensive and important biodiversity patterns on the Earth. Various studies have established that species diversity increases with higher taxa numbers from the polar to the tropics. Studies of multicellular biotas have supported the LDG patterns from land (e.g., plants, animals, forests, w...
Article
Full-text available
The attainment of suitable ambient air quality standards is a matter of great concern for successfully hosting the XXIV Olympic Winter Games (OWG). Transport patterns and potential sources of pollutants in Zhangjiakou (ZJK) were investigated using pollutant monitoring datasets and a dispersion model. The PM 2.5 concentration during February in ZJK...
Article
Full-text available
This paper presents a method for refining the coarse lamellar colonies in α-solidified TiAl alloys using α-segregation. The prerequisite of this method is control of the solidification rate. Isothermal holding at upper and/or middle of α phase region and control of cooling rate from α to (α+γ) phase region is also necessary for better refinement. I...
Article
Full-text available
The complexity of global biodiversity in the tropical Indochina Peninsula and subtropical China bioregions has fascinated biologists for decades, but little is known about the spatiotemporal patterns in these regions. Accordingly, the aims of the present study were to investigate the evolutionary and distribution patterns of Engelhardia in these re...
Article
Full-text available
Tropospheric ozone (O3) pollution, as one of the major environmental problems, poses a significant threat to human health and ecosystems. In the past, the study of O3 risk has only focused on the daytime, neglecting to analyze the role of nighttime concentrations, which may have led to underestimation of O3 exposure hazards. In this study, we inves...
Article
Machine learning based strategies have been increasingly applied in materials science to accelerate the discovery process. Regression algorithm learns the mapping from compositions/features to targeted property and makes prediction for unknown compositions. The quality of features, in some degree, determines the upper limit of the surrogate model p...
Article
s An efficient and simple thermomechanical processing is particularly important to obtain homogenous microstructures. In this work, an optimized thermomechanical processing consisting of multiple isothermal compression processing and stress relaxation processing was conducted on a metastable β titanium alloy (Ti–5Al–5Mo–5V–3Cr-0.5Fe). The sample ge...
Article
Full-text available
Motivated by the ever-increasing wealth of data boosted by national strategies in terms of data-driven Integrated Computational Materials Engineering (ICME), Materials Genome Engineering, Materials Genome Infrastructures, Industry 4.0, Materials 4.0 and so on, materials informatics represents a unique strategy in revealing the fundamental relations...
Article
In the present work, the adiabatic shear characteristics of our recently designed α + β dual-phase Ti alloy at different strain rates have been investigated by hat shaped specimen. The deformation process is divided into three stages: work hardening stage, steady stage, and unstable thermal softening stage. Along or near the shear deformation paths...
Article
Spatiotemporal variations of ozone (O3) taken from the Copernicus Atmosphere Monitoring Service (CAMS) and the second Modern-Era Retrospective Analysis for Research and Applications (MERRA-2) were intercompared and evaluated with ground and ozone-sonde observations over China in 2018 and 2019. Intercomparison of the surface ozone from CAMS and MERR...
Article
Full-text available
The aim of DNA barcoding is to enable fast and accurate species identification. However, universal plant DNA barcodes often do not provide species-level discrimination, especially in taxonomically complex groups. Here we use Lauraceae for the design and evaluation of DNA barcoding strategies, considering: (1) the efficacy of taxon-specific DNA barc...
Article
The structure transition inside the Co-81.5at.%B alloy liquid has been studied by an in-situ magnetization measurement. A crossover was observed on the 1/M-T curve during the overheating process, indicating that a liquid-liquid structure transition (LLST) took place in the melt. Based on this information, the effects of LLST on the solidification b...
Article
Full-text available
The aim of DNA barcoding is to enable fast and accurate species identification. However, universal plant DNA barcodes often do not provide species-level discrimination, especially in taxonomically complex groups. Here we use Lauraceae for the design and evaluation of DNA barcoding strategies, considering: (1) the efficacy of taxon-specific DNA barc...
Article
Secondary inorganic aerosols (SIA) account for 20–60% of the total fine particulates in the Beijing-Tianjin-Hebei (BTH) region of China, indicating an urgent need to clarify the relationship among such compounds. The purpose of this study was to quantify the relationship between emissions of NH3, NOx, SO2, VOCs and SIA concentrations during a sever...
Article
A strain-transformable microstructure was successfully designed in a metastable β Ti–7Mo–3Nb–3Cr–3Al alloy with enhanced mechanical properties, by introducing ∼28% α precipitates coupled with the TRIP effect, overcoming the traditional trade-off dilemma between strength and ductility in most metastable β-Ti alloys. The as-designed lamellar microstr...
Article
Full-text available
Atmospheric aerosols play an important role in the radiation balance of the earth–atmosphere system. However, our knowledge of the long-term changes in equivalent black carbon (eBC) and aerosol optical properties in China is very limited. Here we analyze the 9-year measurements of eBC and aerosol optical properties from 2012 to 2020 in Beijing, Chi...
Article
High‐entropy carbides (HECs) are regarded as potential candidate structural materials with attractive mechanical properties due to their ultra‐high hardness. It is essential to reveal the atomic and electronic basis for strengthening mechanism in order to develop the advanced HECs. In the present work, C (M = Nb, Ti, V) are selected as case studies...