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| 1 | Branched glycerol dialkyl glycerol tetraethers and paleoenvironmental reconstruction in Zoigê peat sediments during the last 150 years显示文摘Branched glycerol dialkyl glycerol tetraethers (GDGTs) were analyzed in peat samples taken from the Zoigê grassland, located on the eastern margin of the Qinghai-Tibetan Plateau. The mean annual air temperature (MAAT) and pH in the 210 Pb-dating peat core were reconstructed based on the cyclization of branched tetraethers (CBT) and methylation of branched tetraethers (MBT) indices for the last 150 years. The results showed that the MAAT and pH values involved three stages of variation over the last 150 years. The pH was stable and the MAAT decreased slowly by about 1°C from 1851 to 1927. The pH decreased rapidly by 0.6 and the MAAT decreased significantly by 2.5°C between 1927 and 1979. The pH and MAAT increased by 0.8 and 5°C, respectively, since the 1980s. The reconstructed temperatures correspond well to the mean winter temperatures reconstructed using tree-rings from the Jiuzhaigou Valley, situated at the boundary between the Qinghai-Tibetan Plateau and the Sichuan Basin. The estimated MAAT was similar to the temperatures reconstructed using tree-rings, indicating an increasing trend, as shown by local instrumental records from 1957 to 2001. These results provide further confidence in the application of proxies based on glycerol dialkyl glycerol tetraethers in peat records for continental paleoclimate reconstruction. | ZHOU HaoDa HU JianFang MING LiLi PENG PingAn ZHANG Gan | 2011 | Chinese Science Bulletin2011，56，23： | 9 |
| 2 | Recent advances in preparation,properties and device applications of twodimensional h-BN and its vertical heterostructures显示文摘Two-dimensional(2D) layered materials,such as graphene,hexagonal boron nitride(h-BN),molybdenum disulfide(Mo S_2/,have attracted tremendous interest due to their atom-thickness structures and excellent physical properties.h-BN has predominant advantages as the dielectric substrate in FET devices due to its outstanding properties such as chemically inert surface,being free of dangling bonds and surface charge traps,especially the large-band-gap insulativity.h-BN involved vertical heterostructures have been widely exploited during the past few years.Such heterostructures adopting h-BN as dielectric layers exhibit enhanced electronic performance,and provide further possibilities for device engineering.Besides,a series of intriguing physical phenomena are observed in certain vertical heterostructures,such as superlattice potential induced replication of Dirac points,band gap tuning,Hofstadter butterfly states,gate-dependent pseudospin mixing.Herein we focus on the rapid developments of h-BN synthesis and fabrication of vertical heterostructures devices based on h-BN,and review the novel properties as well as the potential applications of the heterostructures composed of h-BN. | Huihui Yang Feng Gao Mingjin Dai Dechang Jia Yu Zhou Pingan Hu | 2017 | Journal of Semiconductors2017，38，3： | 3 |
| 3 | Highly sensitive phototransistors based on twodimensional GaTe nanosheets with direct bandgap显示文摘 | Pingan Hu Jia Zhang Mina Yoon Xiao-Fen Qiao Xin Zhang Wei Feng Pingheng Tan Wei Zheng Jingjing Liu Xiaona Wang Juan C. Idrobo David B. Geohegan Kai Xiao | 2014 | Nano Research2014，7，5： | 3 |
| 4 | MEB-YOLO: An Efficient Vehicle Detection Method in Complex Traffic Road Scenes显示文摘Rapid and precise vehicle recognition and classification are essential for intelligent transportation systems,and road target detection is one of the most difficult tasks in the field of computer vision.The challenge in real-time road target detection is the ability to properly pinpoint relatively small vehicles in complicated environments.However,because road targets are prone to complicated backgrounds and sparse features,it is challenging to detect and identify vehicle kinds fast and reliably.We suggest a new vehicle detection model called MEB-YOLO,which combines Mosaic and MixUp data augmentation,Efficient Channel Attention(ECA)attention mechanism,Bidirectional Feature Pyramid Network(BiFPN)with You Only Look Once(YOLO)model,to overcome this problem.Four sections make up this model:Input,Backbone,Neck,and Prediction.First,to improve the detection dataset and strengthen the network,MixUp and Mosaic data improvement are used during the picture processing step.Second,an attention mechanism is introduced to the backbone network,which is Cross Stage Par-tial Darknet(CSPDarknet),to reduce the influence of irrelevant features in images.Third,to achieve more sophisticated feature fusion without increasing computing cost,the BiFPN structure is utilized to build the Neck network of the model.The final prediction results are then obtained using Decoupled Head.Experiments demonstrate that the proposed model outperforms several already available detection methods and delivers good detection results on the University at Albany DEtection and TRACking(UA-DETRAC)public dataset.It also enables effective vehicle detection on real traffic monitoring data.As a result,this technique is efficient for detecting road targets. | Yingkun Song Shunhe Hong Chentao Hu Pingan He Lingbing Tao Zhixin Tie Chengfu Ding | 2023 | Computers, Materials & Continua2023，，6： | 2 |
| 5 | 显示文摘 | Pingan Hu Xiaobao Wang Yunqi Liu BaoWang Daoben Zhu | 2003 | Synthetic Metals2003，，： | 1 |
| 6 | Carrier control of MoS2 nanoflakes by functional self-as- sembled monolayers 显示文摘 | Yang Li Cheng-Yan Xu PingAn Hu Liang Zhen | 2013 | ACS Nano2013，7，9： | 1 |
| 7 | 1 Effect of surfactants on syn hes is of TiO2 Nano-particles by homogeneous precipitation method显示文摘 | WANG HU I LIU PINGAN CH ENG X IAO SU et a | 2008 | Powder Technology2008，3，3： | 1 |
| 8 | Interfacial enhancement of carbon fiber composites by poly(amido amine) functionalization显示文摘 | Qingyu Peng Yibin Li Xiaodong He Hongzhen Lv Pingan Hu Yuanyuan Shang Chao Wang Rongguo Wang Thirumany Sritharan Shanyi Du | 2013 | Composites Science and Technology2013，，： | 1 |
| 9 | Atomically thin InSe:A high mobility two-dimensional material显示文摘Since silicon is limited by its physical properties,it is challenging and important to find candidate materials for high performance electronic devices.Two-dimensional(2D)semiconductor materials have attracted dramatically increasing interest due to their unique physical,electronic and optical properties and great promise for next | FENG Wei ZHENG Wei GAO Feng HU PingAn | 2017 | Science China(Technological Sciences)2017，60，7： | 1 |
| 10 | Fast growth of graphene on SiO2/Si substrates by atmospheric pressure chemical vapor deposition with floating metal catalysts显示文摘Graphene on dielectric substrates is essential for its electronic applications. Graphene is typically synthesized on the surface of metal and then transferred to an appropriate substrate for fabricating device applications. This post growth transfer process is detrimental to the quality and performance of the as-grown graphene. Therefore, direct growth of graphene films on dielectric substrates without any transfer process is highly desirable. However, fast growth of graphene on dielectric substrates remains challenging. Here, we demonstrate a transfer-free chemical vapor deposition (CVD) method to directly grow graphene films on dielectric substrates at fast growth rate using Cu as floating catalyst. A large area (centimeter level) graphene can be grown within 15 min using this CVD method, which is increased by 500 times compared to other direct CVD growth on dielectric substrate in the literatures. This research presents a significant progress in transfer-free growth of graphene and graphene device applications. | Na Liu Jia Zhang Yunfeng Qiu Jie Yang PingAn Hu | 2016 | Science China Chemistry2016，59，6： | 0 |
| 11 | Fast thermal responsive separators toward long-life and safe lithium metal batteries显示文摘Lithium metal batteries(LMBs)have been extensively investigated during the past decades because of their ultrahigh energy densities.With the increasing demand for energy density,however,the safety issue of LMBs has become a significant challenge.In particular,localized areas of increased temperature(namely,hotspots)may be induced and even exacerbated within LMBs by uneven current distribution,internal short circuits,or inadequate heat dissipation,which significantly sacrifices battery safety and cycle life.Here,we report the rational design and fabrication of a fast thermal responsive separator capable of inhibiting the growth of lithium dendrites and mitigating thermal propagation,thereby reducing the risk of thermal runaway.The as-achieved separator comprises both an electrospun membrane using a phase change material with superior thermal-storage ability and a thermally conductive modification layer of hexagonal boron nitride nanosheets with a fast heat-transfer feature.It is demonstrated that such a unique integration of heat conduction and heat storage enables the functional separator with attractive abilities to mitigate hotspots and inhibit the growth of lithium dendrites upon the cycling of LMBs.Moreover,pouch cells with the thermal-responsive separator,as well as numerical simulations,verify much enhanced safety and cycle life of LMBs.This work may offer a new conceptual design of intelligent separators that acts as a functional unit encapsulated within a single cell to boost in-situ thermal management,which will help to develop high-safety and energy-dense LMBs. | Pingan Li Zhifang Liu Yitong Peng Shanshan Yang Tao Meng Yunhuan Hu Yingjun Jiang Hao Sun Qi Li Xianluo Hu | 2024 | Nano Research2024，17，4： | 0 |
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