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| 1 | Feature Extraction Method Based on Pseudo-Wigner-Ville Distribution for Rotational Machinery in Variable Operating Conditions显示文摘In the case of fault diagnosis for roller bearings, the conventional diagnosis approaches by using the time interval of energy impacts in time-frequency distribution or the pass-frequencies are based on the assumption that machinery operates under a constant rotational speed. However, when the rotational speed varies in the broader range, the pass-frequencies vary with the change of rotational speed and bearing faults cannot be identified by the interval of impacts. Researches related to automatic diagnosis for rotational machinery in variable operating conditions were quite few. A novel automatic feature extraction method is proposed based on a pseudo-Wigner-Ville distribution (PWVD) and an extraction of symptom parameter (SP). An extraction method for instantaneous feature spectrum is presented using the relative crossing information (RCI) and sequential inference approach, by which the feature spectrum from time-frequency distribution can be automatically, sequentially extracted. The SPs are considered in the frequency domain using the extracted feature spectrum to identify among the conditions of a machine. A method to obtain the synthetic symptom parameter is also proposed by the least squares mapping (LSM) technique for increasing the diagnosis sensitivity of SP. Practical examples of diagnosis for bearings are given in order to verify the effectiveness of the proposed method. The verification results show that the features of bearing faults, such as the outer-race, inner-race and roller element defects have been effectively extracted, and the proposed method can be used for condition diagnosis of a machine under the variable rotational speed. | WANG Huaqing LIKe SUN Hao CHEN Peng | 2011 | Chinese Journal of Mechanical Engineering2011，24，4： | 8 |
| 2 | Multi-object approach and its appfication to adaptive water management under climate change显示文摘This paper addresses issues on adaptive water management under the impact of climate change.Based on a set of comprehensive indicators of water system,a decision making approach of multi-objects is developed and applied to quantify water adaptive management for the demands of water sustainable use,water environmental protection and eco-water requirement under the climate change.For this study in China,two key indicators are proposed,namely(1) the water resources vulnerability(V) that was represented by integrated sensitivity(S) and resilience(C) of climate change impact on water resources,and(2) the sustainability of socio-economy and water environment,marked by DD,that is integrated scaler of socio-economic development(EG) based on the amount of GDP and the water environment and relative eco-system quality(LI).To find a reasonable solution for adaptive water management,a multi-objective decision making model of adaptive water management is further developed and the multi-objective model was transformed into an integrated single optimization model through developing an integrated measure function,called as VDD=DD/V.This approach has been applied to adaptive water resources planning and management for case study of China with new policy,called as the strict management of water resources based on three red line controls,i.e.,the control of total water use by the total water resources allocation,the control of lower water use efficiency by the water demand management and the control of the total waste water load by water quality management in the Eastern China Monsoon Region that covers major eight big river basins including Yangtze River,Yellow River,Haihe River and Huaihe River.It is shown that the synthetic representation of water resource vulnerability and socio-economic sustainability by the integrated objective function(VDD) and integrated decision making model are workable and practicable.Adaptive management effect of the criterion compliance rate and water use efficiency are more appreciable through new water policy of the three red line controls,which can reduce 21.3% of the water resources vulnerability(V) and increase 18.4% of the sustainability of socioeconomy and water environment(DD) for the unfavorable scenario of climate change in 2030. | HONG Si XIA Jun CHEN Junxu WAN Long NING Like SHI Wei | 2017 | Journal of Geographical Sciences2017，27，3： | 5 |
| 3 | Cryogenic treatment induced hardening for Cu-Zr-Ag-Al bulk metallic glasses显示文摘Little is known about the mechanical properties of bulk metallic glassy alloys(BMGs) after cryogenic treatment.In this study,the effects of cryogenic treatment(CT) on the microstructural transition and the mechanical properties of Cu-based bulk metallic glass(BMG) were studied.The results showed that submicron AlCu2Zr and Cu5Zr phases can precipitate from the Cu-Zr-Ag-Al matrix after 192 h CT.The formation of these nanometer-sized crystalline phases substantially enhanced the mechanical properties of the bulk amorphous alloy.The micro-hardness and the compressive strength were found to increase respectively from 501 HV and 1510 MPa to 595 HV and 1910 MPa after cryogenic treatment.CT is a promising approach to strengthening metal glasses. | CHEN ZhenHua ZHANG LiKe LIU JiZi CHEN Ding | 2013 | Chinese Science Bulletin2013，58，7： | 5 |
| 4 | Sensitivity and vulnerability of water resources in the arid Shiyang River Basin of Northwest China显示文摘The sensitivity and vulnerability of water resources to climate change is difficult to assess. In this study, we used a conceptual hydrologic model to investigate the sensitivity of streamflow to climate change. We also proposed a framework to evaluate the vulnerability of water resources in arid regions. We applied this framework to a case study of the Shiyang River Basin in Northwest China. Results showed that the precipitation and streamflow in Shiyang River Basin exhibited no significant trends of change from 1956 to 2010. In the past five decades, however, the temperature increased significantly by 0.37°C per decade. According to the sensitivity assessment, a 10% increase in precipitation and a 1°C increase in temperature altered mean annual streamflow by averages of 14.6% and –0.5%, respectively, from 1988 to 2005. In the 2000s, the calculated vulnerability of water resources in Shiyang River Basin was more than 0.95, indicating severe vulnerability. The increase in the amount of precipitation and the implementation of water-saving measures can reduce the vulnerability of water resources in the future; if precipitation increases by 10% per decade and the use of irrigation water decreases by 15% in the 2030s, the evaluated value of water resources vulnerability will be reduced to 0.79. However, the region remains highly vulnerable. The proposed framework for vulnerability assessment can be applied to the arid regions in Northwest China, and the results of our efforts can identify adaptation strategies and improve the management of water resources in such regions. | Long WAN Jun XIA HongMei BU Si HONG JunXu CHEN LiKe NING | 2014 | Journal of Arid Land2014，6，6： | 4 |
| 5 | Nonlocal thermoelastic analysis of a functionally graded material microbeam显示文摘In extreme heat transfer environments, functionally graded materials(FGMs)have aroused great concern due to the excellent thermal shock resistance. With the development of micro-scale devices, the size-dependent effect has become an important issue. However, the classical continuum mechanical model fails on the micro-scale due to the influence of the size-dependent effect. Meanwhile, for thermoelastic behaviors limited to small-scale problems, Fourier's heat conduction law cannot explain the thermal wave effect. In order to capture the size-dependent effect and the thermal wave effect, the nonlocal generalized thermoelastic theory for the formulation of an FGM microbeam is adopted in the present work. For numerical validation, the transient responses for a simply supported FGM microbeam heated by the ramp-type heating are considered.The governing equations are formulated and solved by employing the Laplace transform techniques. In the numerical results, the effects of the ramp-heating time parameter, the nonlocal parameter, and the power-law index on the considered physical quantities are presented and discussed in detail. | Wei PENG Like CHEN Tianhu HE | 2021 | Applied Mathematics and Mechanics(English Edition)2021，42，6： | 2 |
| 6 | An electrohydraulic system for synchronized roof erection 显示文摘 | LIKe CHEN Jian XIAO Ziyuan | 2003 | Automation in Construction2003，12，1： | 1 |
| 7 | Reconstruction and petroleum geological significance of lithofacies paleogeography and paleokarst geomorphology of the Middle Permian Maokou Formation in northwestern Sichuan Basin,SW China显示文摘Based on analysis of outcrop,drilling,logging and seismic data,and geotectonic background,the lithofacies paleogeography and paleokarst geomorphology of the Middle Permian Maokou Formation in the northwestern Sichuan Basin were reconstructed,and the petroleum geological significance of the lithofacies paleogeography and paleokarst geomorphology were discussed.The Maokou Formation is divided into 3 long-term cycles,namely LSCl,LSC2 and LSC3,which correspond to the Member 1,Member 2 and Member 3 of the Maokou Formation,respectively.Controlled by the extensional structure caused by opening of the Mianlue Ocean in the north margin of the upper Yangtze blocks and basement faults produced by mantle plume uplifting,the area had tectonic differentiation in NWW and NE,and sedimentary basement took on episodic settlement from north to south,as a result,the sedimentary systems of Member 1 to Member 3 gradually evolved from carbonate platform to platform-slope-continental shelf.According to the residual thickness,paleokarst geomorphologic units such as karst highland,karst slope and karst depression at different stages were reconstructed.The karst geomorphological units were developed successively on the basis of sedimentary geomorphology.Sedimentary facies and paleokarst geomorphology are of great significance for oil and gas accumulation.The Maokou Formation in northwestern Sichuan has two kinds of most favorable reservoir zone combinations:high energy grain shoal and karst monadnock,platform margin slope and karst slope.Based on this understanding,the planar distribution of the two kinds of reservoir zones were predicted by overlapping the favorable reservoir facies belt with paleokarst geomorphology.The study results provide a new idea and reference for the exploration deployment of the Middle Permian Maokou Formation in the Sichuan Basin. | ZHONG Yuan YANG Yueming WEN Long LUO Bing XIAO Di LI Minglong CHEN Cong ZHAO Like LU Feifan TAN Xiucheng | 2021 | Petroleum Exploration and Development2021，48，1： | 1 |
| 8 | Assessment of EDTA heap leaching of an agricultural soil highly contaminated with heavy metals显示文摘 | Pengjie Hu Bingfan Yang Changxun Dong Like Chen Xueying Cao Jie Zhao Longhua Wu Yongming Luo Peter Christie | 2014 | Chemosphere2014，，： | 1 |
| 9 | An E ec- trohydraulic System for Synchronized Roof Erection 显示文摘 | LIKe CHEN Jian XIAO Zi-yuan XU Ming-qian | 2003 | Au- tomation in Construction2003，，12： | 1 |
| 10 | An Intelligent Di- agnosis Method for Rotating Machinery Using Least Squares Mapping and a Fuzzy Neural Network 显示文摘 | LIKE CHEN PENG WANG SHIMING | 2012 | Sensors2012，12，： | 1 |
| 11 | Natural gas geology and exploration direction of the Cambrian Lower Canglangpu Member in central Sichuan paleo-uplift,Sichuan Basin,SW China显示文摘Based on drilling data of JT1 and CS1,outcrop profiles and seismic data,the sedimentary pattern,space configuration of source-reservoir-cap combinations and paleouplift evolution characteristics of the Cambrian Lower Canglangpu Member in the central Sichuan paleouplift have been investigated to determine the favorable exploration zones.Controlled by Deyang-Anyue rift,the Lower Canglangpu Member features differential characteristics from east to west in sedimentary framework.In the west side of the Deyang-Anyue rift,this member is composed of clastic sediments,while in the east side of the Deyang-Anyue rift,it is fresh water shelf sediments,with grain beaches occurring along edges of the depressions,shelf and lagoon.Among the beaches,the dolomitic ones are mainly distributed around the depression edge and in the north of the lagoon.The beach sediments could become high quality reservoirs under the effect of karstification.Underlying the Lower Canglangpu Member is the widespread source rock of the Qiongzhusi Formation,so oil and gas generated by the Qiongzhusi Formation source rock can directly charge into the beach reservoirs.The sandy mudstone of the Upper Canglangpu Member can serve as the caprock of the Lower Canglangpu Member reservoir.The dolomitic beaches are located at the higher part of the paleo-uplift during the main accumulation period,with good hydrocarbon accumulation elements.Blocks PT1-CS1,HT1-GT2 and east GT2 are favorable exploration zones. | YAN Wei LUO Bing ZHOU Gang CHEN Youlian ZHONG Yuan LI Kunyu ZHOU Hongfei ZHAO Like HE Yuan | 2021 | Petroleum Exploration and Development2021，48，2： | 1 |
| 12 | An Electro hydraulic system for synchronized roof erection 显示文摘 | LIKe CHEN Jian XIAO Zi-yuan | 2003 | Au-tomation in Construction2003，12，： | 1 |
| 13 | A Comparative Toxicity Study of TiO2 Nanoparticles in Suspension and Adherent Culture Under the Dark Condition显示文摘 | CHEN Like LIU Miao LENG Su LI Zhuan | 2018 | Chemical Research in Chinese Universities2018，34，1： | 0 |
| 14 | Aiphanol, a native compound, suppresses angiogenesis via dual-targeting VEGFR2 and C0X2显示文摘Dear Editor,Pathological neo-vascularization is a hallmark of cancer and several diseases.Accumulating evidence supports the notion that antiangiogenic treatment can abolish tumor angiogenesis to achieve Ion ger disease-free survival.Although growth factors and their receptors function as the main drivers in angiogenesis,the involvement of other regulators,e.g.,Cyclooxygenase-2(COX2),^(1) should also be con sidered,especially for managi ng the resista nee to therapies against receptor tyrosine kinases(RTKs). | Shanmei Chen Junnan Feng Chuanke Zhao Lixin Wang Lin Meng Caiyun Liu Shaoqing Cai Yanxing Jia Like Qu Chengchao Shou | 2022 | Signal Transduction and Targeted Therapy2022，7，1： | 0 |
| 15 | Data-driven Reactive Power Optimization for Distribution Networks Using Capsule Networks显示文摘The construction of advanced metering infrastructure and the rapid evolution of artificial intelligence bring opportunities to quickly searching for the optimal dispatching strategy for reactive power optimization. This can be realized by mining existing prior knowledge and massive data without explicitly constructing physical models. Therefore, a novel datadriven approach is proposed for reactive power optimization of distribution networks using capsule networks(CapsNet). The convolutional layers with strong feature extraction ability are used to project the power loads to the feature space to realize the automatic extraction of key features. Furthermore, the complex relationship between input features and dispatching strategies is captured accurately by capsule layers. The back propagation algorithm is utilized to complete the training process of the CapsNet. Case studies show that the accuracy and robustness of the CapsNet are better than those of popular baselines(e.g.,convolutional neural network, multi-layer perceptron, and casebased reasoning). Besides, the computing time is much lower than that of traditional heuristic methods such as genetic algorithm, which can meet the real-time demand of reactive power optimization in distribution networks. | Wenlong Liao Jiejing Chen Qi Liu Ruijin Zhu Like Song Zhe Yang | 2022 | Journal of Modern Power Systems and Clean Energy2022，10，5： | 0 |
| 16 | Enhancement of photoelectric performance for CsPbI2Br solar cells by the synergistic effect of binary additives显示文摘CsPbI_(2)Br-based perovskite solar cells(PSCs)have attracted much attention because of their excellent phase stability and appropriate bandgap.However,numerous defects of undercoordinated ions or mobile species are the sites of carrier nonradiative recombination,causing a low power conversion efficiency(PCE).In this work,NaCl and nitrogen-doped graphene quantum dots(N-GQDs)as binary additives are introduced into perovskite precursor to obtain high-quality photoactive films.Chloride ion(Cl^(-))is incorporated into perovskite due to the same physical and chemical properties as bromine(Br^(-)),that align the energy level of CsPbI_(2)Br,decrease the energy barrier between perovskite and P3HT to promote carrier transport and extraction,hence result in the reduced energy loss.Meanwhile,because of its good conductivity,N-GQDs at grain boundaries can rapidly conduct photogenerated electrons to SnO_(2),suppressing carrier recombination at grain boundaries.Furthermore,the trap state density of the CsPbI_(2)Br film with binary additives is reduced,which could prolong the carrier lifetime,and improve surface morphology.As a result,a PCE of 15.37%for CsPbI_(2)Br PSCs with binary additives is obtained,which shows~22.76%relative increment compare with the pristine PSCs.Therefore,a simple and convenient optimization strategy of binary additives for PSCs is proposed in this work. | Qiulu Chen Like Lin Yanzhou Wang Zhe Gao Yujun Fu Qiming Liu Junshuai Li Deyan He | 2023 | Journal of Materiomics2023，9，1： | 0 |
| 17 | Impact of climate change on potential habitat distribution of Sciaenidae in the coastal waters of China显示文摘Climate change has affected and will continue to affect the spatial distribution patterns of marine organisms.To understand the impact of climate change on the distribution patterns and species richness of the Sciaenidae in China’s coastal waters,the maximum entropy model was used to combine six environmental factors and predict the potential distribution of 12 major species of Sciaenidae by 2050s under Representative Concentration Pathways(RCPs)2.6 and 8.5.The results showed that the average area under the receiver operating characteristic curve of the model was 0.917,indicating that the model predictions were accurate and reliable.The main driving factors affecting the potential distribution of these fishes were dissolved oxygen,salinity,and sea surface temperature(SST).There was an overall northward shift in the potential habitat areas of these fishes under the two climate scenarios.The total potential habitat areas of Larimichthys polyactis,Pennahia argentata,and Pennahia pawak decreased under both climate scenarios,while the total habitat area of Johnius belengerii,Pennahia anea,Miichthys miiuy,Collichthys lucidus,and Collichthys niveatus increased,suggesting that these might be loser and winner species,respectively.The expansion rate,contraction rate,degree of centroid change,and species richness in the potential habitats were generally more significant under RCP8.5 than RCP2.6.The mean shift rates of the potential distribution were 41.50 km/(10 a) and 29.20 km/(10 a) under RCP8.5 and RCP2.6,respectively.The changes in Sciaenidae species richness under climate change were bounded by the Changjiang River Estuary waters,with obvious north-south differences.Some waters with increased species richness may become refuges for Sciaenidae fishes under climate change.The richness and habitat area change rate of some aquatic germplasm resources will decrease,meanings that these reserves are more sensitive to climate change,and more attention should be paid to the potential challenges and opportunities for fishery managers.This study may provide a scientific basis for the management and conservation of Sciaenidae in China under climate change. | Wen Yang Wenjia Hu Bin Chen Hongjian Tan Shangke Su Like Ding Peng Dong Weiwei Yu Jianguo Du | 2023 | Acta Oceanologica Sinica2023，42，4： | 0 |
| 18 | Tocilizumab in rheumatoid arthritis-associated peripheral ulcerative keratitis:A case report显示文摘We report a case of rheumatoid arthritis-associated peripheral ulcerative keratitis(PUK)successfully treated with tocilizumab.Despite having been treated with systemic corticosteroids and several disease-modifying antirheumatic drugs and having,received corneal transplantation,the patient lost sight in the left eye.Tocilizumab resulted in a good response,with her systemic illness controlled and the progression of corneal lesions prevented.Tocilizumab may be an additional tool for patients with rheumatoid arthritis associated PUK that is refractory to other drugs. | Jia Huang Zhen Chen Like Zhao Yongjing Cheng Ming Gao Cibo Huang Zheng Wang Fang Wang | 2022 | Rheumatology & Autoimmunity2022，2，1： | 0 |
| 19 | A modified fractional-order thermo-viscoelastic model and its application to a polymer micro-rod heated by a moving heat source显示文摘Classical thermo-viscoelastic models may be challenged to predict the precise thermo-mechanical behavior of viscoelastic materials without considering the memorydependent effect.Meanwhile,with the miniaturization of devices,the size-dependent effect on elastic deformation is becoming more and more important.To capture the memory-dependent effect and the size-dependent effect,the present study aims at developing a modified fractional-order thermo-viscoelastic coupling model at the microscale to account for two fundamentally distinct fractional-order models which govern the memory-dependent features of thermal conduction and stress-strain relation,respectively.Then,the modified theory is used to study the dynamic response of a polymer micro-rod heated by a moving heat source.The governing equations are obtained and solved by the Laplace transform method.In calculation,the effects of the fractional-order parameter,the fractional-order strain parameter,the mechanical relaxation parameter,and the nonlocal parameter on the variations of the considered variables are analyzed and discussed in detail. | Wei PENG Like CHEN Tianhu HE | 2022 | Applied Mathematics and Mechanics(English Edition)2022，43，4： | 0 |
| 20 | Development of plant cytosine base editors with the Cas12a system显示文摘Base editors of the Cas9 system have been widely used for precise nucleotide substitution in crops. In this study, Cas12a was applied to construct plant cytosine base editors(CBEs). The main elements of Cas12aCBEs were engineered and their efficiency was evaluated in stably transformed rice cells. An optimized ttCas12a-hyA3Bctd editor, consisting of a LbCas12a variant carrying catalytic inactive D832A and temperature-tolerance D156R double mutations, a truncated human APOBEC3B deaminase, a human RAD51 single-stranded DNA-binding domain, and double copies of UGI, outperformed other Cas12aCBEs in base editing efficiency. In T0transgenic rice plants, ttCas12a-hyA3Bctd edited an average of42.01% and a maximum of 68.75% of lines at six genomic targets. A-to-G conversions were generated in rice by an adenine base editor with a similar architecture to the optimized CBE. Our results provide preliminary evidence for the feasibility of robust and efficient plant Cas12a base editing systems, which could be useful for precise crop breeding. | Huanhuan Wang Jing Liang Like Chen Bufang Deng Dongfang Gu Xiaoshuang Liu Shan Jin Rongfang Xu Ruiying Qin Yitong Zhu Liangxia Zhao Dourong Kou Yanjun Chen Yingli Jiang Juan Li Pengcheng Wei | 2023 | The Crop Journal2023，11，5： | 0 |
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