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Site selection of self-driving and recreational vehicle camps in China:An investigation using analytic hierarchy process and entropy

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Journal of Traffic and Transportation Engineering(English Edition) 2021年第5期8卷 762-777页

作者： Hua Ding Jianwei Wang wenqiang liao Ting liang Hong Dai Department of Urban and Rural Planning School of ArchitectureChang'an UniversityXi'an 710064China Institute of Tourism Planning and Design Chang'an UniversityXi'an 710064China Department of Data Management and Application College of Transportation EngineeringChang'an UniversityXi'an 710064China The Sixth Division China Construction&Development Co.Ltd.Tianjin 300451China School of Geological Engineering and Geomatics Chang'an UniversityXi'an 710064China

Self-driving and recreational vehicle(RV)camps are a new form of industry module with the integration of transportation and tourism in China,thus the scientific and reasonable site selection plays an important role in the success of camps’construction and *** terms of relying resources and development factors,camps can be divided into five categories:scenic-spot-based,transportation-based,environment-based,project-based and leisure and *** to whether it is of excludability and competitiveness,the camps in China mainly embody the attribute of private *** on the combination of subjective evaluation and objective calculation,the evaluation model of spatial site selection is constructed and the weight of each index is calculated by using analytic hierarchy process(AHP)method and entropy coefficient *** results show that traffic condition factor is the priority to the selection of campsite,and whether it is on the popular main self-driving route and the grade of trunk roads are the dominant *** second factor taken into consideration is the social factors,in which government policy supports and land cost play a key *** third factor is the market,in which the urban economic level,partnership with the government and tourist resource conditionsare of great *** fourth factor of the campsite selection includes natural elements,in which the quality of ecological environment and water source conditions are mostly *** the future,it is suggested that a camp pattern of"public goods"plus"private goods"should be built and the construction of camps in underdeveloped areas should be highly developed so as to form camp spatial network from individual points to a series of campsite and finally the campsite group in China will be set up.

关键词： Self-driving RV camp Product attribute Site selection Evaluation model AHP Entropy

Shape-engineering of organic heterostructures via a sequential selfassembly strategy for multi-channel photon transportation

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Nano Research 2022年第4期15卷 3781-3787页

作者： Yue Yu Qiang Lv Yi Yuan Xue-Dong Wang liang-Sheng liao Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyTaipaMacao 999078MacaoChina

The controlled self-assembly of organic heterostructures(OHSs)with precisely defined compositions,architectures,and interfaces,have largely remained a ***,we introduce an effective approach to accurately construct three types of axial branching OHSs including unilateral axial OHSs,bilateral single-branching axial OHSs and bilateral multi-branching axial OHSs through modulating hierarchical charge-transfer intermolecular interactions and sequential crystal nucleation rate on account of the two different cocrystals with the low lattice mismatching rate of~2.2%.The present work opens an avenue for rationally designing and finely synthesizing more kinds of OHSs.

关键词： sequential self-assembly axial heterostructures non-covalent interaction lattice-match multi-channel outputs

Health effects of fruit juices and beverages with varying degrees of processing

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Food Science and Human Wellness 2024年第5期13卷 2456-2479页

作者： Xinyue Zhang Xiaojun liao Yongtao Wang Lei Rao liang Zhao National Engineering Research Center for Fruit and Vegetable Processing Key Laboratory of Fruit and Vegetable ProcessingKey Laboratory of Food Non-Thermal ProcessingMinistry of Agricultural and Rural AffairsCollege of Food Science&Nutritional EngineeringChina Agricultural UniversityBeijing 100083China

The degree of processing is rarely considered an independent factor in the health effects of fruit juices and beverages(FJBs)*** fact,the consumption of ultra-processed foods has been shown to pose health *** this study,we first integrated 4 systems used to classify the degree of food processing and then classified FJBs into three major categories,low(minimal),moderate and ***,we compared the differences in attitudes towards FJBs in dietary ***,we integrated the results of existing epidemiological surveys,randomized controlled trials,and animal experiments to explore the health risks associated with consuming *** the processing of FJBs has been found to lead to an increased risk of *** pattern,nutrients,addition agents and consumer preferences may be influential ***,we investigated whether there were any changes in the health benefits of 100%fruit juices produced by different processing *** conclusion,minimally/moderately processed 100%fruit juices provide more health benefits than highly processed fruit *** results support the need to consider the extent of FJBs processing in future studies to adjust official nutritional recommendations for beverage consumption.

关键词： Fruit juices and beverages Dietary guidelines Degree of processing Health effects Mechanism

Tuning the electronic properties of hydrogen passivated C3N nanoribbons through van der Waals stacking

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Frontiers of physics 2020年第6期15卷 13-24页

作者： Jia Liu Xian liao Jiayu liang Mingchao Wang Qinghong Yuan State Key Laboratory of Precision Spectroscopy School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China Department of Materials Science and Engineering Monash UniversityClaytonVIC 3800Australia Centre for Theoretical and Computational Molecular Science Australian Institute for Bioengineering and NanotechnologyThe University of QueenslandBrisbaneQLD 4072Australia

The two-dimensional(2D)C3 N has emerged as a material with promising applications in high performance device owing to its intrinsic bandgap and tunable electronic *** there are several reports about the bandgap tuning of C3 N via stacking or forming nanoribbon,bandgap modulation of bilayer C3 N nanoribbons(C3NNRS)with various edge structures is still far from well ***,based on extensive first-principles calculations,we demonstrated the effective bandgap engineering of C3 N by cutting it into hydrogen passivated C3 NNRS and stacking them into bilayer *** was found that armchair(AC)C3 NNRS with three types of edge structures are all semiconductors,while only zigzag(ZZ)C3NNRS with edges composed of both C and N atoms(ZZCN/CN)are *** bandgaps of all semiconducting C3 NNRS are larger than that of C3 N *** interestingly,AC-C3 NNRS with CN/CN edges(AC-CN/CN)possess direct bandgap while ZZ-CN/CN have indirect *** with the monolayer C3 NNR,the bandgaps of bilayer C3NNRS can be greatly modulated via different stacking orders and edge structures,varying from 0.43 eV for ZZ-CN/CN with AB’-stacking to 0.04 eV for AC-CN/CN with ***,transition from direct to indirect bandgap was observed in the bilayer AC-CN/CN heterostructure with AA^stacking,and the indirect-to-direct transition was found in the bilayer ZZ-CN/CN with *** work provides insights into the effective bandgap engineering of C3 N and offers a new opportunity for its applications in nano-electronics and optoelectronic devices.

关键词： first-principles DFT calculations hydrogenated C3N nanoribbons heterostructure bandgap modulation

Relationship between Indian Ocean dipole and ENSO and their connection with the onset of South China Sea summer monsoon

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Acta Oceanologica Sinica 2006年第6期25卷 22-32页

作者： liang Zhaoning wen Zhiping liang Jieyi WU Liji WU Naigeng Research Center for Monsoon and Environment/Department of Atmospheric Sciences Sun Yat-sen University Guangzhou 510275 China

Using Reynolds and Smith 1950 - 1998 re-constructed monthly-mean SST to discuss the relationship between the ENSO and Indian Ocean dipole （IOD） and their possible connection with the onset of South China Sea summer monsoon（ SCSSM）, the results are obtained as follows ： Most of IOD events have a closely positive relation to simultaneous ENSO events in summer and autumn. IOD events in autumn （ mature phase） are also closely related to ENSO events in winter （ mature phase）. When these two kinds of events happen in phase, i.e. , positive （negative） IOD events are coupled with E1 Nifío （La Nifía） events, they are always followed by late （ or early） onsets of SCSSM. On the contrary, when these two kinds of events happen out of phase, i.e. positive （negative） IOD events are coupled with La Nifia （ E1 Nifío） events, they are followed by normal onsets of SCSSM. In addition, single IOD events or single ENSO events cannot correspond well to the abnormal onset of SCSSM.

关键词： Indian Ocean dipole ENSO South China Sea summer monsoon early or late onset

Performance of N95 elastomeric respirators in high humidity and high coal dust concentration environment

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International Journal of Mining Science and Technology 2022年第1期32卷 215-224页

作者： Jintuo Zhu Xinjian He liang Wang Xiaoxue liao Guangping Teng Pengli Jing Key Laboratory of Gas and Fire Control for Coal Mines(China University of Mining and Technology) Ministry of EducationXuzhou 221116China National Professional Laboratory for Fundamental Research of Mine Gas and Dust Control Technology School of Safety EngineeringChina University of Mining and TechnologyXuzhou 221116China School of Safety Engineering China University of Mining and TechnologyXuzhou 221116China

High humidity and high dust concentration in deep coal mines may severely challenge the performance of respirators worn by coal *** paper aims at quantitatively evaluating the respirators used in deep coal mines and providing scientific guidance for the respiratory protection of *** on the self-designed in-situ PM2.5 collector,controllable PM2.5 generator,human breathing simulator,and respirator simulation testing system,under the simulated deep mine working condition,this study investigated the effects of dust loading,wearing time,and dust concentration on the filtration efficiency,breathing resistance,and quality factor of N95 elastomeric *** the increase of dust loading,the respirator filtration efficiency firstly decreased,then increased(minimum value 97.5%).The breathing resistance increased exponentially from 120 to 180 to 1020-1530 Pa,and the quality factor decreased logarithmically from 0.051 to 0.076 to 0.0058-0.0085 Pa^(-1).As the PM2.5 coal dust concentration increased from 5 to 50 mg/m^(3),the wearing time for the respirator breathing resistance to exceed 300 Pa reduced from 7 h to less than 1 *** N95 elastomeric respirator is not able to perform an 8-h work *** avoid the excessive breathing resistance caused by dust loading,more filter cartridges are needed for coal miners.

关键词： Coal dust Respirator Dust loading Filtration efficiency Breathing resistance

A VIBRATION RECOGNITION METHOD BASED ON DEEP LEARNING AND SIGNAL PROCESSING

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工程力学 2021年第4期38卷 230-246页

作者： CHENG Zhi-gang liao wen-jie CHEN Xing-yu LU Xin-zheng Civil Engineering Department Tsinghua UniversityBeijing 100084China Beijing Engineering Research Center of Steel and Concrete Composite Structures Tsinghua UniversityBeijing 100084China Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry Tsinghua UniversityBeijing 100084China

Effective vibration recognition can improve the performance of vibration control and structural damage detection and is in high demand for signal processing and advanced ***-processing methods can extract the potent time-frequency-domain characteristics of signals;however,the performance of conventional characteristics-based classification needs to be *** used deep learning algorithms(e.g.,convolutional neural networks(CNNs))can conduct classification by extracting high-dimensional data features,with outstanding ***,combining the advantages of signal processing and deep-learning algorithms can significantly enhance vibration recognition performance.A novel vibration recognition method based on signal processing and deep neural networks is proposed ***,environmental vibration signals are collected;then,signal processing is conducted to obtain the coefficient matrices of the time-frequency-domain characteristics using three typical algorithms:the wavelet transform,Hilbert-Huang transform,and Mel frequency cepstral coefficient extraction ***,CNNs,long short-term memory(LSTM)networks,and combined deep CNN-LSTM networks are trained for vibration recognition,according to the time-frequencydomain ***,the performance of the trained deep neural networks is evaluated and *** results confirm the effectiveness of the proposed vibration recognition method combining signal preprocessing and deep learning.

关键词： vibration recognition signal processing time-frequency-domain characteristics convolutional neural network(CNN) long short-term memory(LSTM)network

Creep constitutive model considering nonlinear creep degradation of fractured rock

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International Journal of Mining Science and Technology 2024年第1期34卷 105-116页

作者： Wang Chunping Liu Jianfeng Chen liang Liu Jian Wang Lu liao Yilin Beijing Research Institute of Uranium Geology Beijing 100029China CAEA Innovation Center for Geological Disposal of High-Level Radioactive Waste Beijing 100029China State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan UniversityChengdu 610065China School of Architecture and Civil Engineering Xihua UniversityChengdu 610039China

Stability analysis of underground constructions requires a model study of rock masses’ long-term performance. Creep tests under different stress conditions was conducted on intact granite and granite samples fractured at 30° and 45° angles. The experimental results indicate that the steady creep strain rates of intact and fractured rock present an exponential increase trend with the increase of stress level. A nonlinear creep model is developed based on the experimental results, in which the initial damage caused by fracture together with the damage caused by constant load have been taken into consideration. The fitting analysis results indicated that the model proposed is more accurate at identifying the full creep regions in fractured granite, especially the accelerated stage of creep deformation. The least-square fit error of the proposed creep model is significantly lower than that of Nishihara model by almost an order of magnitude. An analysis of the effects of elastic modulus, viscosity coefficient, and damage factors on fractured rock strain rate and creep strain is conducted. If no consideration is given to the effects of the damage, the proposed nonlinear creep model can degenerate into to the classical Nishihara model.

关键词： Fractured rock Damage Creep Beishan granite Geological disposal

AAMcon: an adaptively distributed SDN controller in data center networks

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Frontiers of Computer Science 2020年第1期14卷 146-161页

作者： Waixi LIU Yu WANG Jie ZHANG Hongjian liao Zhongwei liang Xiaochu LIU Department of Electronic and Information Engineering Guangzhou UniversityGuangzhou 510006China

When evaluating the performance of distributed software-defined network(SDN)controller architecture in data center networks,the required number of controllers for a given network topology and their location are major issues of *** address these issues,this study proposes the adaptively adjusting and mapping controllers(AAMcon)to design a stateful data *** use the complex network community theory to select a key switch to place the controller which is closer to switches it controls in a subnet.A physically distributed but logically centralized controller pool is built based on the network function virtualization(NFV).And then we propose a fast start/overload avoid algorithm to adaptively adjust the number of controllers according to the *** performed an analysis for AAMcon to find the optimal distance between the switch and ***,experiments show the following results.(1)For the number of controllers,AAMcon can greatly follow the demand;for the placement location of controller,controller can respond to the request of switch with the least distance to minimize the delay between the switch and it.(2)For failure tolerance,AAMcon shows good robustness.(3)AAMcon requires less delay to the network with more significant community *** fact,there is an inverse relationship between the community modularity and average distance between the switch and controller,i.e.,the average delay decreases when the community modularity increases.(4)AAMcon can achieve the load balance between the controllers.(5)Compared to DCP-GK and k-critical,AAMcon shows good performance.

关键词： software defined network controller placement community adaptively adjusting