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| 1 | Comparison of three evapotranspiration models with eddy covariance measurements for a Populus euphratica Oliv.forest in an arid region of northwestern China显示文摘The accurate estimation of evapotranspiration(ET) in arid regions is important for improving the water use efficiency of vegetation. Based on successive observations from May to October of 2014, we estimated the ET of a Populus euphratica Oliv. forest during the growing season in an extremely arid region using the PM(Penman-Monteith), SW(Shuttleworth-Wallace) and SSW(an improved canopy transpiration model) models. Estimated ET values were compared with those of the eddy covariance measurements. Results indicated that the actual ET of the P. euphratica forest was always overestimated by the PM model. The accuracy of the SW model was higher than that of the PM model. However, some data were not easily obtained because of the complicated structure of the SW model. The newly proposed SSW model gave the most accurate ET values, and its accuracy was higher at hourly than at daily time scale. In conclusion, the SSW model is more suitable for sparse vegetation system at large scales in extremely arid regions. | GAO Guanlong ZHANG Xiaoyou YU Tengfei LIU Bing | 2016 | Journal of Arid Land2016，8，1： | 12 |
| 2 | Performance of biotrickling filters packed with structured or cubic polyurethane sponges for VOC removal显示文摘Two identical bench-scale biotrickling filters (BTFs),BTF 1 and BTF 2,were evaluated for toluene removal at various gas empty bed contact times (EBCTs) and organic loadings.BTF 1 and BTF 2 were packed with structured and cubic synthetic polyurethane sponges,respectively.At a constant toluene loading of 16 g/(m 3 ·hr),toluene removal efficiencies decreased from 98.8% to 64.3% for BTF 1 and from 98.4% to 74.1% for BTF 2 as gas EBCT decreased from 30 to 5 sec.When the toluene loading increased from 35 to 140 g/(m 3 ·hr) at a gas EBCT of 30 sec,the removal efficiencies decreased from 99.1% to 77.4% for BTF 1 and from 99.0% to 81.5% for BTF 2.The pressure drop for both BTFs increased with increased air flow rate,and did not significantly vary while the toluene loading was increased under similar operation conditions.BTF 1 and BTF 2 could start up successfully within 19 and 27 days,respectively,when packed with fresh sponge media,and the performances could be restored in 3-7 days after biomass was removed and wasted from the media.BTF 2 displayed higher removal efficiency even under shorter EBCT or higher loading rate than BTF1 when other operation conditions were similar,while it showed lower pressure drop than BTF 1 during the whole period of operation.These results demonstrated that both BTFs could treat waste gas containing toluene effectively. | Chunping Yang Guanlong Yu Guangming Zeng Haining Yang Fayuan Chen Congying Jin | 2011 | Journal of Environmental Sciences2011，23，8： | 10 |
| 3 | Floor heave characteristics and control technology of the roadway driven in deep inclined-strata显示文摘Based on in-mine instrumentation and theoretical analysis of the unsymmetrical large-deformation that occurred in the roadway after excavation,Differential Floor Heave(DFH)was found to be the main reason for roadway failure.It needs to be pointed out that the specific roadway was driven in inclined rock strata.In addition,the factors that contribute to the occurrence of DFH are discussed in detail.It is believed that DFH is triggered by the unsymmetrical stress distribution in the floor and the different rock types encountered near the two floor corners.Hence,DFH control should be focused on the left floor corner where shearing failure occurs initially and the left floor surface where tensile failure is more severe.The proposed DFH control strategies include unsymmetrical grouting for the whole roadway,re-design of the roof and ribs support,reinforcement of the weak zones,and release of the concentrated stress in the earlier stage.Meanwhile,it is recommended that in the later stage,both bolts and cable bolts with higher strength and the backfilling technique using the coal measure rocks and concrete should be employed in the reversed-arch floor.The field instrumentation results,after using the proposed control strategies,indicate that large deformation in a DFH roadway has been successfully controlled. | Wang Meng Guo Guanlong Wang Xiangyu Guo Yu Dao Vietdoan | 2015 | International Journal of Mining Science and Technology2015，25，2： | 7 |
| 4 | Evapotranspiration of a Populus euphratica forest during the growing season in an extremely arid region of northwest China using the Shuttleworth–Wallace model显示文摘Thus far, measurements and estimations of actual evapotranspiration(ET) in extremely arid areas are still insufficient. Based on successive observations from June–September 2014, we simulated ET of a Populus euphratica Oliv. forest during the growing season in an extremely arid region of northwest China using the Shuttleworth–Wallace(S–W) model. Simulated ET values were compared to those of the eddy-covariance(EC) method on a 1 h interval. With a root mean square error(RMSE),relative error(RE) and mean absolute error(MAE) of0.192, 3.100 and 0.165 mm h-1, respectively, model performance was not satisfactory. In particular, on days with strong winds(Sep. 11–13), deviations between simulated and observed ET values increased to 0.275, 0.878 and0.251 mm h-1, RMSE, RE and MAE respectively. These values were significantly greater than those in other study periods and were most likely owing to sharp increases in wind speed. As a result, there were substantial advective effects, which is not consistent with the assumption of the S–W model that there are no advective effects or mesoscale circulation patterns induced by surface discontinuities. | Guanlong Gao Xiaoyou Zhang Tengfei Yu | 2016 | Journal of Forestry Research2016，27，4： | 6 |
| 5 | Analytical and Experimental Studies on Critical Blank-holder Forces in Cylindrical cup deep drawing显示文摘Based on the plastic deformation theory and energy method, the critical blank-holder forces (BHF) of wrinkling and fracture in the cylindrical cup deep-drawing are analyzed. The verify experiments were performed and compared with the theory analysis results. The predictions agree well with the experiment results. Thus, the validated presenttheoretical analysis model may be applied to determinate the suitable BHF. | Lin Zhongqin Sun Chengzhi Chen Guanlong Yu Haiyan | 2004 | 上海交通大学学报2004，38，z2： | 4 |
| 6 | Test and application of hydraulic expansion bolts in a roadway under goaf with ultra-close separation显示文摘The roof of a roadway under goaf with ultra-close separation consists of thin rock strata and rocks caving in upper goaf. Influenced by the mining of the upper coal seam, the roof is loose and broken, and its integrity is poor. Resin anchored bolts cannot provide an effective anchoring force in such roof conditions. By conducting free expansion tests and field pull-out tests on a hydraulic expansion bolt, this study has analyzed the influencing factors and laws of radial expansion and anchoring force changes in the rod body.This has revealed the anchoring mechanism of such bolts, and has obtained reasonable water injection pressures and suitable drilling diameters(which are 20–25 MPa and 32–35 mm respectively) for the hydraulic expansion bolt(u28 mm) used in these tests. Based on pull-out tests at different interlayer spacing, the applicability of hydraulic expansion bolts had been verified for controlling the roof of roadways under goaf with ultra-close distance. Combined with the deformation and failure characteristics of the test roadway roof, this paper proposes a united roof-control technology based on the use of hydraulic expansion bolts and advancing intubation for the roof. Engineering practice indicated that the roof of the test roadway did not generate leaking and caving phenomenon, and the amount of roof deformation was controlled to within 150 mm. Maintenance of the roadway roof has been improved significantly, which ensures safe mining in coal seams with ultra-close separation. | Wang Xiangyu Bai Jianbiao Guo Guanlong Yu Yang | 2014 | International Journal of Mining Science and Technology2014，24，6： | 4 |
| 7 | Topology of Current-limiting and Energy-transferring DC Circuit Breaker for DC Distribution Networks显示文摘With the development of power electronic technologies and distributed power generation,DC distribution networks attract increasing attention due to their various advantages compared with traditional AC distribution networks.However,DC fault protection is one of the major issues in DC distribution networks.To improve their reliability and protect the semiconductor devices under DC faults,a current-limiting and energy-transferring DC circuit breaker topology is proposed in this paper.By applying passive components and thyristors,the proposed topology is capable of quickly limiting the fault current and transferring the faulty energy.The working principle,mathematical model and parameter designing method of the proposed topology are presented in this paper.The simulation results verify that the proposed DC circuit breaker could effectively limit the fault current and quickly interrupt the fault current.Cost and conduction power loss evaluation proves the practicality of the proposed topology in medium-voltage DC distribution networks. | Song Tang Min Chen Guanlong Jia Chenghao Zhang | 2020 | CSEE Journal of Power and Energy Systems2020，6，2： | 3 |
| 8 | Investigation of Swelling and Dissolution Process of Natural Rubber in Aromatic Oil显示文摘Aromatic oil has been used to promote the properties of crumb rubber modified asphalt which is an ideal method to deal with the resource utilization of waste rubber tires and by-product of refinery. Furfural extract oil(FEO) was separated into the light fraction and the heavy fraction. Swelling and dissolution process of natural rubber sheet in these three oil samples was investigated to shed light on the interaction mechanism. Crumb rubber also interacted on FEO and asphalt respectively. Energy dispersive spectrometer(EDS), thermo-gravimetric analysis(TGA) and scanning electron microscope(SEM) were used to characterize the chemical and structural properties of processed rubber. The chemical composition of processed oils and asphalt was investigated by using the hydrocarbon group analysis(SARA) and gel permeation chromatography. The results revealed that the swelling rate and mass loss of rubber in oils were much higher than those in asphalt and rose with an increasing processing temperature. The heavy fraction of FEO had more diffusion and dissolving capability than the light fraction, whilst compatibility was observed between the heavy fraction and the light fraction. Selective absorption was not observed in the study and detachment of dissolved rubber was disseminated from the outside to the inside. The cross-linking degree of the residue rubber was unchanged with the processing time, and sulfur predominantly remained in the undissolved rubber. Dissolution of crumbed rubber in oils was attributed to devulcanization, while that in the asphalt was mainly attributed to depolymerization. | Wang Feng Kuang Minming Li Guanlong Zhou Xiaolong Li Chenglie | 2015 | China Petroleum Processing & Petrochemical Technology2015，17，3： | 3 |
| 9 | Effects of demineralization on phenols distribution and formation during coal pyrolysis显示文摘 | Yonghui Bai Lunjing Yan Guanlong Li Ruifang Zhao Fan Li | 2014 | Fuel2014，，： | 2 |
| 10 | Geochemical characteristics of Carboniferous volcanic rocks from the Wulungu-Luliang area, Junggar basin: constraints on magma source and tectonic setting显示文摘The Carboniferous volcanic rocks in the Wulungu-Luliang area are mainly andesites of medium- to high-K calc-alkalic series. Volcanic rock samples have relatively high alkali(Na2O + K2 O = 4.7 % to 6.8 %) and low Ti O2contents(0.7 % to 0.9 %), relatively high Mg O(2.5 % to 3.4 %) and Mg#(49.9 % to 67.1 %), high rare earth element(REE) contents, and relatively high K2 O contents(1.7 % to 3.1 %). Chondrite-normalized REE patterns show light REE enrichment((La/Yb)N= 4.15 to 5.19)with weak Eu anomalies(d Eu = 0.75 to 0.92). These samples are enriched in large-ion lithophile elements but relatively depleted in high field strength elements. The trace elements and REE patterns are similar to those of Setouchi and central Ryukyu high-Mg andesites, indicating a highMg andesite source. Relatively high Y contents(16.7 to24.4 ppm), and relatively low Sr/Y ratios(17.2 to 38.8) and Ti O2contents(0.7 % to 0.9 %) exclude the possibility of slab melting. Low Sr/Nd(16.6 to 42.8), Ba/Th(66.4 to266.8), and U/Th(0.2 to 0.3) indicate that the influence of slab-derived fluids is low. The ratios of Ce/Th(4.9–7.3), Ce/Pb(1.8–4.2), Ba/Rb(7.99–22.03), Ba/Th(66.4–266.8), and La/Sm(3.6–4.3) are similar to ratios found in subducting sediment melts. Relatively high ratios of K/Nb(1357–3258),Th/La(0.28–0.42), Zr/Nb(8.8–27.1), and especially Th/Nb(0.48–1.25) suggest that the magma was assimilated and contaminated by upper continental crust. These characteristics, along with the ratios of La/Yb, Sc/Ni, Th/Yb, Ta/Yb,Ce/P2O5, and Zr/Ti O2, demonstrate that the earlier Carboniferous volcanic rocks in the Wulungu-Luliang area were generated in a continental island-arc setting. | Wei Liu Kuihua Zhang Guanlong Zhang Peiming Zhou Qizhi Wang | 2015 | Chinese Journal Of Geochemistry2015，34，4： | 2 |
| 11 | Lightweight design of automotive front side rail based on robust optimization显示文摘 | ZHANG Yu ZHU Ping CHEN Guanlong | 2007 | Thin-Walled Structures2007，45，： | 1 |
| 12 | The Effect of Variable Blank-Holder Forces on the Formability of Aluminum Alloy Sheets during Sheet Metal Forming显示文摘In this paper, the effect of variable Blank-holder forces (VBHF) on the strain path during sheet metal forming has been investigated by numerical simulation and experiments. The formability of select aluminum alloy sheet was evaluated by theory prediction of forming limit curve based on the M-K method. The effect of different VBHF on the formability was presented. In order to verify the predictions of strain path, experiments are being carried out using a recently-built multi-points variable blank-holder forces hydraulic press. The results show that large side BHF with small comer BHF during rectangular box deep drawing can improve the formability of the selected aluminum alloy | Sun Chengzhi Chen Guanlong Lin Zhongqin | 2004 | 上海交通大学学报2004，38，z2： | 1 |
| 13 | Study on real-time measurement of nugget diameter for resistance spot welding using a neuro-fuzzy algorithm 显示文摘 | LIN Zhongqin ZHANG Yansong CHEN Guanlong | 2004 | Instrumentation and Measurement Technology Conference2004，13，12： | 1 |
| 14 | Novel algorithm for dertermining optimal blankholder forces in deep drawing of aluminium alloy sheet显示文摘 | Sun Chengzhi Chen Guanlong Lin Zhongqin | | 0，，14： | 1 |
| 15 | Measuring and modeling evapotranspiration of a Populus euphratica forest in northwestern China显示文摘Vegetation is sparsely distributed in the arid regions of northwestern China,and accurately measuring and partitioning of evapotranspiration is of importance for ecosystems in such areas.In this study,we measured and analyzed diurnal and phenological variations in evapotranspiration using the eddy-covariance method based on the Penman-Monteith,Priestley-Taylor,Shuttleworth-Wallace models,a newly proposed improved dual source model and a clumped model in a forest reserve in the Ejin oasis of Populus euphratica in 2015 and 2016 growing seasons.A sensitivity analysis was performed for the models with higher accuracies and we examined the biotic and abiotic controls on evapotranspiration.The results show that the total amounts of evapotranspiration during the two growing seasons in 2015 and 2016 were 622 and 612 mm,respectively.Phenological variations in evapotranspiration produced single-peak curves,while diurnal variations reflected the influence of high temperatures on some afternoons.The Priestley-Taylor and the improved dual source models gave the most accurate evapotranspiration values at the daily scale and appeared to be most suitable for the estimation of evapotranspiration for the species in arid regions.In addition,both models were the most sensitive to net radiation(Rn). | Guanlong Gao Qi Feng Xiande Liu Yonghua Zhao | 2021 | Journal of Forestry Research2021，32，5： | 1 |
| 16 | New muhiresolution modeling techniques in CAD 显示文摘 | Yin Jinxing Chen Guanlong Lin Zhongqin | 2006 | Computer-Aided Design2006，38，2： | 1 |
| 17 | Biodiversity arks in the Anthropocene显示文摘The Anthropocene proposal suggested that the Earth may have entered a new geological epoch,in which human activity and climate change are influencing the environment at global scale.Arrival of the Anthropocene is bringing an unprecedented challenge to the biodiversity that is essential to humans,and enhancing many benefits of nature to human being.However,biodiversity loss is aggravating in the rhythm of inevitable change in the Anthropocene,and the adaptation of biodiversity to the anthropogenic disturbance seems unable to keep pace with the human activity and climate change.Therefore,re-examination of the assumptions and practices upon the current conservation endeavor are needed.We suggested that biodiversity conservation should be paid more attention to the response from biodiversity to the human activity and climate change in the Anthropocene.Thus,the concept of biodiversity arks in the Anthropocene is proposed,that is,biodiversity arks in the Anthropocene are the areas where vulnerable biodiversity is sheltered to alleviate human activity and buffered from climate change under the anthropogenic disturbance.The concept should be implemented for biodiversity conservation to fill gaps between our knowledge and build on successful conservation and sustainability in the Anthropocene.It will be certainly important to conservation policy instruction and management under climate change,especially the implementation of climate buffering zones preserving biodiversity in the face of warming climate. | Honghu Meng Xiaoyang Gao Yigang Song Guanlong Cao Jie Li | 2021 | Regional Sustainability2021，2，2： | 1 |
| 18 | Influence of Resistance Heating on Self-Piercing Riveted Dissimilar Joints of AA6061-T6 and Galvanized DP590 显示文摘 | Lou Ming Li Yongbing Chen Guanlong | 2014 | Journal of Materials Processing Technology2014，214，10： | 1 |
| 19 | Quantitative analysis of surface deflections in the automobile exterior panel based on a curvature-deviation method显示文摘 | SHEN Hongqing LI Shuhui CHEN Guanlong | 2012 | Journal of Materials Processing Technology2012，212，： | 1 |
| 20 | Study on real-time measurement of nugget diameter for resist- ance spot welding using a neuron-fuzzy algorithm 显示文摘 | LINZhongqin ZHANG Yansong CHEN Guanlong | 2004 | Instru- mentation and Measurement Technology Conference2004，13，12： | 1 |
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