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| 1 | Spatial dynamics of aboveground carbon stock in urban green space:a case study of Xi'an,China显示文摘Greenhouse gas emission of carbon dioxide(CO2) is one of the major factors causing global climate change.Urban green space plays a key role in regulating the global carbon cycle and reducing atmospheric CO2.Quantifying the carbon stock,distribution and change of urban green space is vital to understanding the role of urban green space in the urban environment.Remote sensing is a valuable and effective tool for monitoring and estimating aboveground carbon(AGC) stock in large areas.In the present study,different remotely-sensed vegetation indices(VIs) were used to develop a regression equation between VI and AGC stock of urban green space,and the best fit model was then used to estimate the AGC stock of urban green space within the beltways of Xi'an city for the years 2004 and 2010.A map of changes in the spatial distribution patterns of AGC stock was plotted and the possible causes of these changes were analyzed.Results showed that Normalized Difference Vegetation Index(NDVI) correlated moderately well with AGC stock in urban green space.The Difference Vegetation Index(DVI),Ratio Vegetation Index(RVI),Soil Adjusted Vegetation Index(SAVI),Modified Soil Adjusted Vegetation Index(MSAVI) and Renormalized Difference Vegetative Index(RDVI) were lower correlation coefficients than NDVI.The AGC stock in the urban green space of Xi'an in 2004 and 2010 was 73,843 and 126,621 t,respectively,with an average annual growth of 8,796 t and an average annual growth rate of 11.9%.The carbon densities in 2004 and 2010 were 1.62 and 2.77 t/hm2,respectively.Precipitation was not an important factor to influence the changes of AGC stock in the urban green space of Xi'an.Policy orientation,major ecological greening projects such as 'transplanting big trees into the city' and the World Horticultural Exposition were found to have an important impact on changes in the spatiotemporal patterns of AGC stock. | ZhengYang YAO JianJun LIU XiaoWen ZHAO DongFeng LONG Li WANG | 2015 | Journal of Arid Land2015，7，3： | 13 |
| 2 | Three-dimensional experimental study of loose top-coal drawing law for longwall top-coal caving mining technology显示文摘Based on the loose medium flow field theory, the loose top-coal drawing law of longwall top-coal caving(LTCC) mining technology is studied by using self-developed three-dimensional(3D) test device. The loose top-coal drawing test with shields and the controlled test without shields are performed in the condition without any boundary effect. Test results show that shields will cause reduction in drawing volume of coal in the LTCC mining. The deflection phenomenon of drawing body is also observed in the controlled test, which is verified that the deflection of drawing body is caused by shield. It is found that the deflection angle decreases with increasing caving height, with the maximum value of atailand the minimum value of 0. In addition, the formula to calculate the drawing volume is proposed subsequently.The deflection of drawing body is numerically simulated using particle flow code PFC3 Dand the proposed formula to calculate drawing volume in LTCC is also verified. | Jiachen Wang Jinwang Zhang Zhengyang Song Zhaolong Li | 2015 | Journal of Rock Mechanics and Geotechnical Engineering2015，7，3： | 12 |
| 3 | Porous nitrogen-doped carbon/MnO coaxial nanotubes as an efficient sulfur host for lithium sulfur batteries显示文摘As a promising candidate for next generation energy storage devices, lithium sulfur (Li-S) batteries still confrant rapid capacity degradation and low rate capability. Herein, we report a well-architected porous nitrogen-doped carbon/MnO coaxial nanotubes (MnO@PNC) as an efficient sulfur host material. The host shows excellent electron conductivity, sufficient ion transport channels and strong adsorption capability for the polysulfides, resulting from the abundant nitrogen-doped sites and pores as well as MnO in the carbon shell of MnO@PNC. The MnO@PNC-S composite electrode with a sulfur content of 75 wt.% deliveries a specific capacity of 802 mAh·g^-1 at a high rate of 5.0C and outstanding cycling stability with a capacity retention of 82% after 520 cycles at 1.0C. | Chao Lin Longbing Qu Jiantao Li Zhengyang Cai Haoyun Liu Pan He Xu Xu Liqiang Mai | 2019 | Nano Research2019，12，1： | 10 |
| 4 | Electrochemical performance of Ti_(3)C_(2)supercapacitors in KOH electrolyte显示文摘Two-dimensional(2D)carbide Ti_(3)C_(2)was synthesized by exfoliating Ti_(3)AlC_(2)in HF solution and used for supercapacitive performance investigation in 3 M KOH electrolyte.The specific surface area(SSA)of as-synthesized Ti_(3)C_(2)was 22.35 m^(2)/g.Ti_(3)C_(2)-based supercapacitor electrodes exhibited good energy storage ability and had a volumetric capacitance 119.8 F/cm^(3)at the current density of 2.5 A/g.Moreover,the addition of carbon black into Ti_(3)C_(2)powders greatly improved the performance of Ti_(3)C_(2)-based capacitors because carbon black restrained the preferred orientation of 2D Ti_(3)C_(2),providing fast ion transport channels,and in turn,decreasing electrical resistance from 16.7Ωto 3.5Ω. | Yupeng GAO Libo WANG Zhengyang LI Yafei ZHANG Baolin XING Chuanxiang ZHANG Aiguo ZHOU | 2015 | Journal of Advanced Ceramics2015，4，2： | 10 |
| 5 | Design of PANDA ring-core fiber with 10 polarization-maintaining modes显示文摘We present a polarization-maintaining PANDA ring-core fiber(PM-PRCF) characterized by the combination of a ring-core structure with two stress-applying rods. This special fiber design separates the adjacent modes and avoids the cutoff of the higher-order modes, which is a common problem in elliptical core polarization-maintaining few-mode fibers. Using a high-contrast index ring and stress-induced birefringence, the PM-PRCF features support for 10 vector modes, with effective refractive index separations from their adjacent modes >10^(-4).Broadband performance is investigated subsequently over a wide wavelength range from 1500 to 1630 nm.The proposed fiber is targeted at applications in space-division multiplexing while eliminating the complex multiple-input multiple-output signal processing. | Haozhe Yan Shangyuan Li Zhengyang Xie Xiaoping Zheng Hanyi Zhang Bingkun Zhou | 2017 | Photonics Research2017，5，1： | 7 |
| 6 | Optical observations of LIGO source GW 170817 by the Antarctic Survey Telescopes at Dome A,Antarctica显示文摘The LIGO detection of gravitational waves(GW) from merging black holes in 2015 marked the beginning of a new era in observational astronomy. The detection of an electromagnetic signal from a GW source is the critical next step to explore in detail the physics involved. The Antarctic Survey Telescopes(AST3),located at Dome A, Antarctica, is uniquely situated for rapid response time-domain astronomy with its continuous night-time coverage during the austral winter. We report optical observations of the GW source(GW 170817) in the nearby galaxy NGC 4993 using AST3. The data show a rapidly fading transient at around 1 day after the GW trigger, with the i-band magnitude declining from 17:23 ± 0:13 magnitude to 17:72 ± 0:09 magnitude in ~1:8 h. The brightness and time evolution of the optical transient associated with GW 170817 are broadly consistent with the predictions of models involving merging binary neutron stars. We infer from our data that the merging process ejected about ~10^(-2) solar mass of radioactive material at a speed of up to 30% the speed of light. | lei hu xuefeng wu igor andreoni michael c.b.ashley jeff cooke xiangqun cui fujia du zigao dai bozhong gu yi hu haiping lu xiaoyan li zhengyang li ensi liang liangduan liu bin ma zhaohui shang tianrui sun n.b.suntzeff charling tao syed a.uddin lifan wang xiaofeng wang haikun wen di xiao jin xu ji yang shihai yang xiangyan yuan hongyan zhou hui zhang jilin zhou zonghong zhu | 2017 | Science Bulletin2017，62，21： | 6 |
| 7 | Corrosion behavior of Ti_(3)AlC_(2) in molten KOH at 700℃显示文摘This paper investigated the corrosion behaviors of Ti_(3)AlC_(2) at 700℃in molten KOH with various mass ratios.If the mass ratio of KOH:Ti_(3)AlC_(2)≤2,Ti_(3)AlC_(2) can resist KOH hot corrosion in 2 h.Ti_(3)AlC_(2) suffered serious corrosion attack if the mass ratio≥3.The main compositions of corroded samples were amorphous graphite and potassium titanates(K_(2)O·nTiO_(2)).If the samples were washed by acid and dried,potassium titanates could decompose to K_(2)O and amorphous rutile.Based on the experimental results,a corrosion mechanism of Ti_(3)AlC_(2) in molten KOH was proposed. | Dandan SUN Aiguo ZHOU Zhengyang LI Libo WANG | 2013 | Journal of Advanced Ceramics2013，2，4： | 5 |
| 8 | Flexible and wearable BaTiO_(3)/polyacrylonitrile-based piezoelectric sensor for human posture monitoring显示文摘Tactile sensors are essential components of wearable electronic devices,but there are still various problems in terms of energy supply,flexibility and skin adaptability.In this paper,we report a self-powered flexible tactile sensor(FTS)mainly composed of a BaTiO_(3)/polyacrylonitrile/Ecoflex(BTO/PAN/Ecoflex)composite film,which can be used for dynamically monitoring human plantar pressure,posture and other physiological and motion parameters.Combining the synergistic piezoelectric properties of PAN and BTO,the output voltage/current of the BTO/PAN/Ecoflex composite film is 4.5/5.8 times that of the BTO/Ecoflex composite film,with maximum instantaneous power that can reach up to 3.375μW.Under the action of external pressure stress,the FTS can reach a normalized voltage sensitivity and voltage linearity of 0.54 V/N and 0.98,respectively.Furthermore,a human-machine interaction test system is built,which can display the stress changes of human body monitoring parts in real time according to voltage changes and different color assignments.The developed human-machine interaction test system provides a new idea for the diagnosis of flatfoot and other medical diseases.Hence,this work proposes new FTSs that use a BTO/PAN/Ecoflex composite film with high sensitivity and great output performance,thus exhibiting immense potential application prospects in medical research,personalized recognition and human-machine interaction. | MU JiLiang XIAN Shuai YU JunBin LI ZhengYang ZHAO JuanHong ZHONG JiXin HAN XiaoTao HOU XiaoJuan HE Jian CHOU XiuJian | 2022 | Science China(Technological Sciences)2022，65，4： | 3 |
| 9 | Synthesis of High Pure Ti_3AlC_2 and Ti_2AlC Powders from TiH_2 Powders as Ti Source by Tube Furnace显示文摘Titanium aluminum carbide(Ti3AlC2 and Ti2AlC) powders were synthesized from TiH2 powders instead of Ti powders as Ti source by a tube furnace under argon atmosphere without preliminary dehydrogenation.95 wt% pure Ti3AlC2 powders were synthesized from TiH 2/1.1Al/2TiC at 1 450 ℃ for 120 min.High-purity Ti2AlC powders were also prepared from 3TiH2/1.5Al/C and 2TiH2/1.5Al/TiC powders at 1 400 ℃ for 120 min.The as-synthesized samples were porous and easy to be ground into powders.Sn or Si additives in starting materials increased the purity of synthesized Ti 3 AlC 2 obviously and expanded the temperature range for the synthesis of Ti3AlC2.With Si or Sn as additives,high pure Ti3AlC2 was synthesized at 1 200 ℃ for 60 min from TiH/x Si/Al/2TiC and TiH/x Sn/Al/2TiC(x=0.1,0.2),respectively. | 李良 周爱国 XU Lin LI Zhengyang WANG Libo | 2013 | Journal of Wuhan University of Technology(Materials Science)2013，28，5： | 3 |
| 10 | A dual population multi-operator genetic algorithm for flight deck operations scheduling problem显示文摘It is of great significance to carry out effective scheduling for the carrier-based aircraft flight deck operations.In this paper,the precedence constraints and resource constraints in flight deck operations are analyzed,then the model of the multi-aircraft integrated scheduling problem with transfer times(MAISPTT)is established.A dual population multi-operator genetic algorithm(DPMOGA)is proposed for solving the problem.In the algorithm,the dual population structure and random-key encoding modified by starting/ending time of operations are adopted,and multiple genetic operators are self-adaptively used to obtain better encodings.In order to conduct the mapping from encodings to feasible schedules,serial and parallel scheduling generation scheme-based decoding operators,each of which adopts different justified mechanisms in two separated populations,are introduced.The superiority of the DPMOGA is verified by simulation experiments. | CUI Rongwei HAN Wei SU Xichao LIANG Hongyu LI Zhengyang | 2021 | Journal of Systems Engineering and Electronics2021，32，2： | 3 |
| 11 | High Precision Data-driven Force Control of Compact Elastic Module for a Lower Extremity Augmentation Device显示文摘 | Likun Wang Chaofeng Chen Zhengyang Li Wei Dong Zhijiang Du Yi Shen Guangyu Zhao | 2018 | Journal of Bionic Engineering2018，15，5： | 3 |
| 12 | Molecular cloning and expression patterns of the cholesterol side chain cleavage enzyme(CYP11A1) gene during the reproductive cycle in goose(Anas cygnoides)显示文摘Background: CYP11A1, a gene belonging to the family 11 of cytochrome P450, encodes a crucial steroidogenic enzyme that catalyzes the initial step in the production of all classes of steroids. Many studies show that CYP11A1 plays a role in ovary function. However, the role of CYP11A1 in goose reproductive cycle remains largely unknown.Results: In this study, full-length CYP11A1 c DNA of Zhedong goose was obtained using reverse transcription polymerase chain reaction(RT-PCR) and rapid amplification of c DNA ends(RACE). The c DNA consisted of a 96-base pair(bp) 5′untranslated region(UTR), a 179-bp 3′UTR and a 1509-bp open reading frame. The open reading frame encodes a putative 503 amino acid protein that shares high homology with CYP11A1 of other birds. The amino acid sequence possesses conserved domains of the P450 superfamily, which include the steroid-binding domain and the heme-binding region. Real-time quantitative polymerase chain reaction(q PCR) analysis revealed CYP11A1 mR NA was expressed ubiquitously in every Zhedong goose tissue analyzed, including the heart, liver, glandular stomach,lung, spleen, kidney, intestinum tenue, intestinum crassum, cerebrum, cerebellum, muscle, oviduct, pituitary,hypothalamus and ovary.. The relatively low levels of CYP11A1 m RNA were detected in pituitary, ovary and oviduct tissues at ovulation when compared with levels at oviposition. Interestingly, higher expression was observed in ovary and oviduct tissues during brooding. Lastly, higher m RNA expression of Yangzhou geese was detected during the ovulation period than that of Zhedong geese.Conclusions: Our findings reveal the sequence characterization and expression patterns of the CYP11A1 gene during the goose reproductive cycle, which may provides correlative evidence that CYP11A1 expression is important in reproduction activity. | Qi Xu Yadong Song Yang Chen Ran Liu Yang Zhang Yang Li Zhengyang Huang Wenming Zhao Guobin Chang Guohong Chen | 2016 | Journal of Animal Science and Biotechnology2016，7，2： | 2 |
| 13 | Mirror seeing of the Antarctic survey telescope显示文摘Site testing results indicate that Antarctic Dome A is an excellent ground-based astronomical site suitable for observations ranging from visible to infrared wavelengths. However, the harsh environment in Antarctica, especially the very low temperature and atmospheric pressure, always produces frost on the telescopes' mirrors, which are exposed to the air. Since the Dome A site is still unattended, the Antarctic telescope tubes are always designed to be fi lled with dry nitrogen, and the outer surfaces of the optical system are heated by an indium-tin oxide thin fi lm. These precautions can prevent the optical surfaces from frosting over, but they degrade the image quality by introducing additional mirror seeing. Based on testing observations of the second Antarctic Survey Telescope(AST3-2) in the Mohe site in China, mirror seeing resulting from the heated aspheric plate has been measured using micro-thermal sensors. Results comparing the real-time atmospheric seeing monitored by the Differential Image Motion Monitor and real-time examinations of image quality agree well. | ZHANG Kaiyuan LI Zhengyang YUAN Xiangyan PEI Chong | 2014 | Advances in Polar Science2014，25，3： | 2 |
| 14 | Assessment of strong earthquake risk in the Chinese mainland from 2021 to 2030显示文摘The long-term earthquake prediction from 2021 to 2030 is carried out by researching the active tectonic block boundary zones in the Chinese mainland.Based on the strong earthquake recurrence model,the cumulative probability of each target fault in the next 10 years is given by the recurrence period and elapsed time of each fault,which are adopted from relevant studies such as seismological geology,geodesy,and historical earthquake records.Based on the long-term predictions of large earthquakes throughout the world,this paper proposes a comprehensive judgment scheme based on the fault segments with the seismic gap,motion strongly locked,sparse small-moderate earthquakes,and apparent Coulomb stress increase.This paper presents a comprehensive analysis of the relative risk for strong earthquakes that may occur in the coming 10 years on the major faults in the active tectonic block boundary zones in the Chinese mainland.The present loading rate of each fault is first constrained by geodetic observations;the cumulative displacement of each fault is then estimated by the elapsed time since the most recent strong earthquake. | Zhigang Shao Yanqiang Wu Lingyun Ji Faqi Diao Fuqiang Shi Yujiang Li Feng Long Hui Zhang Wuxing Wang Wenxin Wei Peng Wang Xiaoxia Liu Qi Liu Zhengyang Pan Xiaofei Yin Yue Liu Wei Feng Zhenyu Zou Jia Cheng Renqi Lu Yueren Xu Xi Li | 2023 | Earthquake Research Advances2023，3，1： | 2 |
| 15 | Investigation on crater morphology by high repetitive rate YAG laser-induced discharge texturing显示文摘 | Zhengyang Li Yang Mingjiang Wenjin Liu Minlin Zhong | 2005 | Surface & Coatings Technology2005，，14： | 1 |
| 16 | Investigation on rolling sliding wear behavior of wheel by laser dispersed treatment显示文摘 | Li Zhengyang Xing X H Yang M J | 2014 | Wear2014，314，： | 1 |
| 17 | Influence of laser dispersed treatment on rolling contact wear and fatigue behavior of railway wheel steel 显示文摘 | Zeng Dongfang Lu Liantao Li Zhengyang | 2014 | Material Design2014，54，： | 1 |
| 18 | Added Value of Diffusion-weighted MR Imaging to T2-weighted and Dynamic Contrast-enhanced MR Imaging in T Staging of Gastric Cancer显示文摘 | Song Liu Jian He Wenxian Guan Qiang Li Haiping Yu Zhuping Zhou Shanhua Bao Zhengyang Zhou | 2013 | Clinical Imaging2013，，： | 1 |
| 19 | Design and synthesis of delivery system based on SBA 15 with magnetic particles formed in situ and thermo- sensitive PNIPA as controlled switch显示文摘 | Zhu Shenmin Zhou Zhengyang Zhang Di Jin Chan Li Zhiqiang | 2007 | Microporous and Mesoporous Materials2007，106，123： | 1 |
| 20 | Over-Expression of Small Ubiquitin-Related Modifier-1 and Sumoylated p53 in Colon Cancer显示文摘 | Hongjie Zhang Xiaoyi Kuai Zeyu Ji Zhengyang Li Ruihua Shi | 2013 | Cell Biochemistry and Biophysics2013，，3： | 1 |
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