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Exploring the Long-Term Mechanism of the Construction of College Teachers’Ethics in the New Era Under the Concept of“Sanquan Education”
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作者 Jing Zuo Xiaoyue Liu 《Journal of Contemporary Educational Research》 2024年第1期140-146,共7页
This paper takes the long-term mechanism exploration of the construction of teachers’ethics in the new era under the concept of“Sanquan education,”aiming to explore how to establish a long-term mechanism of the con... This paper takes the long-term mechanism exploration of the construction of teachers’ethics in the new era under the concept of“Sanquan education,”aiming to explore how to establish a long-term mechanism of the construction to meet the needs of college education development under the background of the new era.A series of targeted measures and suggestions are put forward,including improving the system and mechanism,strengthening the education and training of teachers’ethics,and establishing the evaluation and assessment mechanism.The implementation of these measures can promote the formation of the long-term mechanism of the construction of teachers’ethics in colleges and universities,improve teachers’ethics and behavior quality,and provide strong support for the development of education in colleges and universities. 展开更多
关键词 Sanquan education ETHICS College education long-term mechanism Teacher quality
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Formation mechanism of nanopores in dense films of anodic alumina
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作者 Peng-ze LI Yu ZHANG +5 位作者 Jia-zheng ZHANG Lin LIU Shi-yi WANG Rui LIU Ye SONG Xu-fei ZHU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2024年第9期2918-2927,共10页
Constant-current anodization of pure aluminum was carried out in non-corrosive capacitor working electrolytes to study the formation mechanism of nanopores in the anodic oxide films.Through comparative experiments,nan... Constant-current anodization of pure aluminum was carried out in non-corrosive capacitor working electrolytes to study the formation mechanism of nanopores in the anodic oxide films.Through comparative experiments,nanopores are found in the anodic films formed in the electrolytes after high-temperature storage(HTS)at 130°C for 240 h.A comparison of the voltage-time curves suggests that the formation of nanopores results from the decrease in formation efficiency of anodic oxide films rather than the corrosion of the electrolytes.FT-IR and UV spectra analysis shows that carboxylate and ethylene glycol in electrolytes can easily react by esterification at high temperatures.Combining the electronic current theory and oxygen bubble mold effect,the change in electrolyte composition could increase the electronic current in the anodizing process.The electronic current decreases the formation efficiency of anodic oxide films,and oxygen bubbles accompanying electronic current lead to the formation of nanopores in the dense films.The continuous electronic current and oxygen bubbles are the prerequisites for the formation of porous anodic oxides rather than the traditional field-assisted dissolution model. 展开更多
关键词 anodic alumina formation mechanism NANOPORES formation efficiency electronic current oxygen bubble
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Mechanisms of Difference in Mn Efficiency Between Wheat and Oilseed Rape 被引量:7
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作者 FANGZHENG ZHANGFUSUO 《Pedosphere》 SCIE CAS CSCD 2000年第3期213-220,共8页
By solution culture experiment, three wheat genotypes (Ttiticum aestivum L.) and two oilseed rape genotypes (Brassica napus L.) differing in Mn efficiency under Mn-deficient conditions were used to study mechanisms of... By solution culture experiment, three wheat genotypes (Ttiticum aestivum L.) and two oilseed rape genotypes (Brassica napus L.) differing in Mn efficiency under Mn-deficient conditions were used to study mechanisms of the difference in Mn efficiency between wheat and oilseed rape. The results showed that there were significant differences in the abilities of MnIV reduction and acidification in root rhizosphere between the two species. Compared with wheat, oilseed rape had much higher reducing capacity and intensity of rhizosphere acidification under Mn-deficient conditions. Moreover, the higher ratio of functional leaves Mn/old leaves Mn in oilseed rape than in wheat was also an important factor for the different Mn efficiencies between the two species. 展开更多
关键词 genotypic difference mechanism Mn efficiency oilseed rape whL
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Efficiency and mechanism of pretreatment on water supply in reservoirs of Yellow River by subsurface constructed wetlands 被引量:1
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作者 杨旭 于水利 +3 位作者 赵焱 严晓菊 修春海 王冬光 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2009年第5期652-655,共4页
In order to improve the source water quality of drinking water and mitigate the load of drinking water treatment plant, a pilot test was conducted with integrated horizontal flow constructed wetlands to pretreat the w... In order to improve the source water quality of drinking water and mitigate the load of drinking water treatment plant, a pilot test was conducted with integrated horizontal flow constructed wetlands to pretreat the water supply in the reservoirs of Yellow River. Resuhs show that under the hydraulic loading rate of 4 m^3/( m^2 · d), the average removal rates of chemical oxygen demand (COD), total nitrogen (TN), ammonium nitrogen ( NH4 ^+ - N), nitrate nitrogen ( NO3 ^- - N), nitrite - nitrogen ( NO2^ - - N) and total phosphorus (TP) in the horizontal flow constructed wetlands are 49. 68% , 53.01%, 48.48%, 53.61% , 62. 57% and 49. 56%, re- spectively. The study on purifying mechanism of the constructed wetlands indicates that the disposal of contamination by subsurface wetlands is the combined actions of physical chemistry, plants and microorganism. 展开更多
关键词 constructed wetland water supply in reservoirs of Yellow River PRETREATMENT efficiency and mechanism
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Mechanism of current efficiency improvement of Zn-Fe alloy electroplating by hydrogen inhibitor
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作者 王云燕 柴立元 《Journal of Central South University of Technology》 EI 2007年第3期336-339,共4页
The effect of hydrogen inhibitor on partial current densities ofZn, Fe and differential capacitance of electrode/electrolyte interface, and adsorbing type of hydrogen inhibitor were studied by the methods of electroch... The effect of hydrogen inhibitor on partial current densities ofZn, Fe and differential capacitance of electrode/electrolyte interface, and adsorbing type of hydrogen inhibitor were studied by the methods of electrochemistry. The mechanism of current efficiency improvement were explained from the point of valence electron theory. The results indicate that the partial current density of Fe increases in addition of hydrogen inhibitor, which reaches the maximum of 0.14 A/dm^2 when current density is 0.2 A/din〈 Differential capacitance of electrode/electrolyte interface decreases obviously from 20.3μF/cm^2 to 7 μF/cm^2 rapidly with the concentration varying from 0 to 20 mL/L, because hydrogen inhibitor chemically adsorbs on active points of Fe electrode surface selectively. Element S in hydrogen inhibitor with negative electricity and strong capacity of offering electron shares isolated electrons with Fe. The adsorption of H atom is inhibited when adsorbing on active points of Fe electrode surface firstly, and then current efficiency of Zn-Fe alloy electroplating is improved accordingly. 展开更多
关键词 Zn-Fe alloy electroplating current efficiency hydrogen inhibitor mechanism
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The Efficiency of Multi-Range Hydro-Mechanical Stepless Transmission 被引量:7
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作者 苑士华 胡纪滨 《Journal of Beijing Institute of Technology》 EI CAS 1998年第2期129-134,共6页
Aim To determine efficiency of multi-range hydro-mechanical stepless transmis- sion(HMT).Methods Ageneral model of HMT was of HMT was structured.On the basis of power flow analysis, the efficiency was obtained,Results... Aim To determine efficiency of multi-range hydro-mechanical stepless transmis- sion(HMT).Methods Ageneral model of HMT was of HMT was structured.On the basis of power flow analysis, the efficiency was obtained,Results efficiency of multi-range HMT changes continuously with output speed in speed range and is higher than the highest point of the hydraulic efficiency,The volumetric efficiency can potentially result in the speed fluctuation, which can be reduced or eliminated through controlling the ratio of the displacements ofhydraulic unity properly or changing the point of range exchanging .And the mechanical- constant output torque or different output torque under the condition of constant pressure when the transmission works in different parts of a range,Conclusion The multi-range HMT is an ideal stepless transmission with high efficiency. 展开更多
关键词 hydro - mechanical transmission stepless transmission: efficiency of transmission
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Electronegativity explanation on the efficiency-enhancing mechanism of the hybrid inorganic–organic perovskite ABX_3 from first-principles study
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作者 陈清源 黄杨 +3 位作者 黄鹏儒 马泰 曹超 何垚 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第2期393-398,共6页
Organic–inorganic hybrid perovskites play an important role in improving the efficiency of solid-state dye-sensitized solar cells. In this paper, we systematically explore the efficiency-enhancing mechanism of ABX_3... Organic–inorganic hybrid perovskites play an important role in improving the efficiency of solid-state dye-sensitized solar cells. In this paper, we systematically explore the efficiency-enhancing mechanism of ABX_3(A = CH_3NH_3; B = Sn,Pb; X = Cl, Br, I) and provide the best absorber among ABX_3 when the organic framework A is CH_3NH_3 by first-principles calculations. The results reveal that the valence band maximum(VBM) of the ABX_3 is mainly composed of anion X p states and that conduction band minimum(CBM) of the ABX_3 is primarily composed of cation B p states. The bandgap of the ABX_3 decreases and the absorptive capacities of different wavelengths of light expand when reducing the size of the organic framework A, changing the B atom from Pb to Sn, and changing the X atom from Cl to Br to I. Finally, based on our calculations, it is discovered that CH_3NH_3 Sn I_3has the best optical properties and its light-adsorption range is the widest among all the ABX_3 compounds when A is CH_3NH_3. All these results indicate that the electronegativity difference between X and B plays a fundamental role in changing the energy gap and optical properties among ABX_3 compounds when A remains the same and that CH_3NH_3 Sn I_3 is a promising perovskite absorber in the high efficiency solar batteries among all the CH_3NH_3BX_3 compounds. 展开更多
关键词 ABX3 efficiency-enhancing mechanism of ABX3 optical and electronic properties hybrid per-ovskite solar cells
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The Mesh Efficiency of the Planetary Mechanism of 2K-H[D] Style
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作者 杨照山 陈明 《Journal of China Textile University(English Edition)》 EI CAS 1998年第3期85-87,共3页
The mesh efficiency of the planetary mechanism of 2K - H[D] style is discussed. It comes to a new formula. Usually, an approximate value is taken as the mesh efficiency of a planetary mechanism. If the formula is used... The mesh efficiency of the planetary mechanism of 2K - H[D] style is discussed. It comes to a new formula. Usually, an approximate value is taken as the mesh efficiency of a planetary mechanism. If the formula is used, the theoretical value of mesh efficiency can be gotten. The theoretical mesh efficiency can help engineers to know the true efficiency of 2K - H[D] style when it runs. The mesh efficiency serves the transmitting efficiency of a planetary mechanism. 展开更多
关键词 MESH efficiency GEAR mechanism PLANETARY .
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Tandem catalysis in electrocatalytic nitrate reduction:Unlocking efficiency and mechanism 被引量:2
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作者 Ziyang Wu Yanhui Song +4 位作者 Haocheng Guo Fengting Xie Yuting Cong Min Kuang Jianping Yang 《Interdisciplinary Materials》 EI 2024年第2期245-269,共25页
The electrochemical nitrate reduction reaction(NO_(3)RR)holds promise for ecofriendly nitrate removal.However,the challenge of achieving high selectivity and efficiency in electrocatalyst systems still significantly h... The electrochemical nitrate reduction reaction(NO_(3)RR)holds promise for ecofriendly nitrate removal.However,the challenge of achieving high selectivity and efficiency in electrocatalyst systems still significantly hampers the mechanism understanding and the large-scale application.Tandem catalysts,comprising multiple catalytic components working synergistically,offer promising potential for improving the efficiency and selectivity of the NO3RR.This review highlights recent progress in designing tandem catalysts for electrochemical NO_(3)RR,including the noble metal-related system,transition metal electrocatalysts,and pulsed electrocatalysis strategies.Specifically,the optimization of active sites,interface engineering,synergistic effects between catalyst components,various in situ technologies,and theory simulations are discussed in detail.Challenges and opportunities in the development of tandem catalysts for scaling up electrochemical NO_(3)RR are further discussed,such as stability,durability,and reaction mechanisms.By outlining possible solutions for future tandem catalyst design,this review aims to open avenues for efficient nitrate reduction and comprehensive insights into the mechanisms for energy sustainability and environmental safety. 展开更多
关键词 efficiency electrocatalytic nitrate reduction mechanism SELECTIVITY tandem catalysts
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Nitrogen Deep Placement Combined with Straw Mulch Cultivation Enhances Physiological Traits,Grain Yield and Nitrogen Use Efficiency in Mechanical Pot-Seedling Transplanting Rice 被引量:8
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作者 LI Lin ZHANG Zheng +7 位作者 TIAN Hua Umair ASHRAF Yousef Alhaj HAMOUD Al Aasmi ALAA TANG Xiangru DUAN Meiyang WANG Zaiman PAN Shenggang 《Rice science》 SCIE CSCD 2022年第1期89-100,I0031,共13页
To assess the effects of straw return coupled with deep nitrogen(N)fertilization on grain yield and N use efficiency(NUE)in mechanical pot-seedling transplanting(MPST)rice,the seedlings of two rice cultivars,i.e.,Yuxi... To assess the effects of straw return coupled with deep nitrogen(N)fertilization on grain yield and N use efficiency(NUE)in mechanical pot-seedling transplanting(MPST)rice,the seedlings of two rice cultivars,i.e.,Yuxiangyouzhan and Wufengyou 615 transplanted by MPST were applied with N fertilizer at 150 kg/hm2 and straw return at 6 t/hm2 in early seasons of 2019 and 2020.The experiment comprised of following treatments:CK(no fertilizer and no straw return),MDS(deep N fertilization and straw return),MBS(broadcasting fertilizer and straw return),MD(deep N fertilization without straw return),MB(broadcasting fertilizer without straw return).Results depicted that the MDS treatment significantly increased the rice yield by 41.69%-72.22%due to total above-ground biomass,leaf area index and photosynthesis increased by 54.70%-55.80%,38.52%-52.17%and 17.89%-28.40%,respectively,compared to the MB treatment.In addition,the MDS treatment enhanced the total N accumulation by 37.74%-43.69%,N recovery efficiency by 141.45%-164.65%,N agronomic efficiency by 121.76%-134.19%,nitrate reductase by 46.46%-60.86%and glutamine synthetase by 23.56%-31.02%,compared to the MB treatment.The average grain yield and NUE in both years for Yuxiangyouzhan were higher in the MDS treatment than in the MD treatment.Hence,deep N fertilization combined with straw return can be an innovative technique with improved grain yield and NUE in MPST in South China. 展开更多
关键词 mechanical pot-seedling transplanting nitrogen deep placement nitrogen use efficiency RICE straw return
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Numerical and experimental analyses of rock failure mechanisms due to microwave treatment
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作者 Haitham M.Ahmed Adel Ahmadihosseini +5 位作者 Ferri Hassani Mohammed A.Hefni HussinA.M.Ahmed Hussein A.Saleem Essam B.Moustafa Agus P.Sasmito 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2023年第10期2483-2495,共13页
Despite the extensive studies conducted on the effectiveness of microwave treatment as a novel rock preconditioning method,there is yet to find reliable data on the rock failure mechanisms due to microwave heating.In ... Despite the extensive studies conducted on the effectiveness of microwave treatment as a novel rock preconditioning method,there is yet to find reliable data on the rock failure mechanisms due to microwave heating.In addition,there is no significant discussion on the energy efficiency of the method as one of the important factors among the mining and geotechnical engineers in the industry.This study presents a novel experimental method to evaluate two main rock failure mechanisms due to microwave treatment without applying any mechanical forces,i.e.distributed and concentrated heating.The result shows that the existence of a small and concentrated fraction of a strong microwave absorbing mineral will change the failure mechanism from the distributed heating to the concentrated heating,which can increase the weakening over microwave efficiency(WOME)by more than 10 folds.This observation is further investigated using the developed coupled numerical model.It is shown that at the same input energy,the existence of microwave absorbing minerals can cause major heat concentration inside the rock and increase the maximum temperature by up to three times. 展开更多
关键词 Microwave treatment Numerical modeling Failure mechanism Energy efficiency Rock pre-conditioning
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3D inner-outer asymmetric sponge for enormous-volume emulsion wastewater treatment based on a new“demulsification-transport”mechanism
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作者 Ruixiang Qu Shuaiheng Zhao +5 位作者 Na Liu Xiangyu Li Huajun Zhai Ya'nan Liu Yen Wei Lin Feng 《Green Energy & Environment》 SCIE EI CAS CSCD 2023年第5期1398-1408,共11页
Although oily wastewater treatment realized by superwetting materials has attracted heightened attention in recent years,how to treat enormous-volume emulsion wastewater is still a tough problem,which is ascribed to t... Although oily wastewater treatment realized by superwetting materials has attracted heightened attention in recent years,how to treat enormous-volume emulsion wastewater is still a tough problem,which is ascribed to the emulsion accumulation.Herein,to address this problem,a material is presented by subtly integrating chemical demulsification and 3D inner-outer asymmetric wettability to a sponge substrate,and thus wettability gradient-driven oil directional transport for achieving unprecedented enormous-volume emulsion wastewater treatment is realized based on a“demulsification-transport”mechanism.The maximum treatment volume realized by the sponge is as large as 3 L(2.08×10^(4) L per cubic meter of the sponge)in one cycle,which is about 100 times of the reported materials.Besides,owing to the large pore size of the sponge,9000 L m^(2)h^(-1)(LMH)separation flux and 99.5%separation efficiency are realized simultaneously,which overcomes the trade-off dilemma.Such a 3D inner-outer asymmetric sponge displaying unprecedented advantage in the treatment volume can promote the development of the oily wastewater treatment field,as well as expand the application prospects of superwetting materials,especially in continuous water treatment. 展开更多
关键词 Enormous-volume emulsion treatment Inner-outer asymmetric wettability Demulsification-transport mechanism High separation efficiency
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Effects of aggregating forests, establishing forest road networks, and mechanization on operational efficiency and costs in a mountainous region in Japan 被引量:1
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作者 Kazuhiro Aruga Gyo Hiyamizu +1 位作者 Chikara Nakahata Masashi Saito 《Journal of Forestry Research》 SCIE CAS CSCD 2013年第4期747-754,共8页
We investigated forest road networks and forestry operations before and after mechanization on aggregated forestry operation sites. We developed equations to estimate densities of road networks with average slope angl... We investigated forest road networks and forestry operations before and after mechanization on aggregated forestry operation sites. We developed equations to estimate densities of road networks with average slope angles, operational efficiency of bunching operations with road network density, and average forwarding distances with operation site areas. Subsequently, we analyzed the effects of aggregating forests, establishing forest road networks, and mechanization on operational efficiency and costs. Six ha proved to be an appropriate operation site area with minimum operation expenses. The operation site areas of the forest owners' cooperative in this region aggregated approximately 6 ha and the cooperative conducted forestry operations on aggregated sites. Therefore, 6 ha would be an appropriate operation site area in this region. Regarding road network density, higher-density road networks increased operational expenses due to the higher direct operational expenses of strip road establishment. Therefore, road network density should be reduced to approximately 200 m. 展开更多
关键词 aggregating forests establishing forest road networks mechanIZATION operational efficiency COSTS
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The efficiency of long-term straw return to sequester organic carbon in Northeast China's cropland 被引量:22
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作者 WANG Shi-chao ZHAO Ya-wen +5 位作者 WANG Jin-zhou ZHU Ping CUI Xian HAN Xiao-zeng XU Ming-gang LU Chang-ai 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2018年第2期436-448,共13页
Black soil is one of the most precious soil resources on earth because it has abundant carbon stocks and a relatively high production capacity. However, decreasing organic matter after land reclamation, and the effect... Black soil is one of the most precious soil resources on earth because it has abundant carbon stocks and a relatively high production capacity. However, decreasing organic matter after land reclamation, and the effects of long-term inputs of organic carbon have made it less fertile black soil in Northeast China. Straw return could be an effective method for improving soil organic carbon(SOC) sequestration in black soils. The objective of this study was to evaluate whether straw return effectively increases SOC sequestration. Long-term field experiments were conducted at three sites in Northeast China with varying latitudes and SOC densities. Study plots were subjected to three treatments: no fertilization(CK); inorganic fertilization(NPK); and NPK plus straw return(NPKS). The results showed that the SOC stocks resulting from NPKS treatment were 4.0 and 5.7% higher than those from NPK treatment at two sites, but straw return did not significantly affect the SOC stocks at the third site. Furthermore, at higher SOC densities, the NPKS treatment resulted in significantly higher soil carbon sequestration rates(CSR) than the NPK treatment. The equilibrium value of the CSR for the NPKS treatment equated to cultivation times of 17, 11, and 8 years at the different sites. Straw return did not significantly increase the SOC stocks in regions with low SOC densities, but did enhance the C pool in regions with high SOC densities. These results show that there is strong regional variation in the effects of straw return on the SOC stocks in black soil in Northeast China. Additional cultivations and fertilization practices should be used when straw return is considered as an approach for the long-term improvement of the soil organic carbon pool. 展开更多
关键词 soil organic carbon(SOC) SOC stock straw return soil sequestration rate straw-C sequestration efficiency black soil long-term experiments
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The mechanical measuring method of welding heat source efficiency 被引量:1
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作者 张建强 张国栋 +2 位作者 何洁 王承权 陈冰泉 《China Welding》 EI CAS 2007年第4期51-55,共5页
Based on the principle of residual deformation induced by superposition of the welding residual stress and working stress, the welding heat source efficiency has been determined by measuring displacement changes of sp... Based on the principle of residual deformation induced by superposition of the welding residual stress and working stress, the welding heat source efficiency has been determined by measuring displacement changes of specimens under loading and unloading in tensile tests, and combining with calculating welding parameters. Meanwhile, the welding heat source eficiencies obtained are compared with those of the measuring-calculating method. The research results show that the welding heat source efficiencies are almost the same as those obtained by the measuring-calculating method. Therefore, the welding heat source efficiency can be determined accurately by this method, and a new determining method of the heat source efficiency for the welding heat process calculating has been provided. 展开更多
关键词 welding heat source efficiency welding stress welding distortion mechanical measuring-calculating method
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Gadolinium-incorporated CsPbI_(2)Br for boosting efficiency and long-term stability of all-inorganic perovskite solar cells 被引量:1
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作者 Xingyu Pu Jiabao Yang +9 位作者 Tong Wang Shuaici Cheng Qi Cao Junsong Zhao Hui Chen Yixin Zhang Tingting Xu Ilhom Tojiboyev Hadi Salari Xuanhua Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第7期9-17,I0001,共10页
All-inorganic CsPbI_(2)Br perovskite solar cells(PSCs)have received extensive research interests recently.Nevertheless,their low efficiency and poor long-term stability are still obstacles for further commercial appli... All-inorganic CsPbI_(2)Br perovskite solar cells(PSCs)have received extensive research interests recently.Nevertheless,their low efficiency and poor long-term stability are still obstacles for further commercial application.Herein,we demonstrate that high efficiency and exceptional long-term stability are realized by incorporating gadolinium(III)chloride(GdCl_(3))into the CsPbI_(2)Br perovskite film.The incorporation of GdCl_(3) enhances the Goldschmidt tolerance factor of CsPbI_(2)Br perovskite,yielding a dense perovskite film with small grains,thus the a-phase CsPbI_(2)Br is remarkably stabilized.Additionally,it is found that the GdCl_(3)-incorporated perovskite film achieves suppressed charge recombination and appropriate energy level alignment compared with the pristine CsPbI_(2)Br film.The noticeable increment in efficiency from14.01%(control PSC)to 16.24%is achieved for GdCl_(3)-incorporated PSC.Moreover,the nonencapsulated GdCl_(3)-incorporated PSC exhibits excellent environmental and thermal stability,remaining over 91%or90%of the original efficiency after 1200 h aging at 40%relative humidity or 480 h heating at 85℃ in nitrogen glove box respectively.The encapsulated GdCl_(3)-incorporated PSC presents an improved operational stability with over 88%of initial efficiency under maximum power point(MPP)tracking at 45℃ for1000 h.This work presents an effective ion-incorporation approach for boosting efficiency and long-term stability of all-inorganic PSCs. 展开更多
关键词 All-inorganic perovskite CsPbI_(2)Br Gadolinium incorporation Power conversion efficiency long-term stability
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基于改进EfficientNetB0模型的葡萄叶部病害识别方法
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作者 胡施威 邓建新 +1 位作者 王浩宇 邱林 《现代电子技术》 北大核心 2024年第15期73-80,共8页
为了高效、准确地识别葡萄叶部病害,文中提出了LE-EfficientNet模型,在EfficientNetB0模型基础上,采用大核注意力(LKA)机制替换原模型部分MBConv模块中的压缩激励网络(SENet),接着利用跳跃连接在最后一层卷积层后面融入高效通道注意力机... 为了高效、准确地识别葡萄叶部病害,文中提出了LE-EfficientNet模型,在EfficientNetB0模型基础上,采用大核注意力(LKA)机制替换原模型部分MBConv模块中的压缩激励网络(SENet),接着利用跳跃连接在最后一层卷积层后面融入高效通道注意力机制(ECA),结合三种注意力机制让网络更高效地提取葡萄叶部病害的局部重要信息,并引用Adam优化器替换原模型的SGD优化器,提升了分类模型的泛化能力。在PlantVillage葡萄叶部病害数据集上训练,结果表明,LE-EfficientNet模型相比原模型准确率提升了1.58%,总体精度提升了1.62%,召回率提升了1.46%,F_(1)分数提升了1.53%,并且参数量仅有10.18 MB,比原模型参数量降低2.7 MB,与其他经典网络模型相比,性能评估指标均有不同程度的提升,该研究为葡萄叶部病害识别提供了新的参考与借鉴。 展开更多
关键词 葡萄叶部病害 卷积神经网络 图像分类 大核注意力机制 高效通道注意力机制 efficientNetB0
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Countermeasures for Establishing a Long-term Security Mechanism for Landless Farmers
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作者 Jiefang ZHU 《Asian Agricultural Research》 2020年第1期25-27,31,共4页
In the process of urbanization,farmers will inevitably lose their land,which is resulted from the large-scale requisition of rural collective land.The imperfect social security system in rural areas has resulted in a ... In the process of urbanization,farmers will inevitably lose their land,which is resulted from the large-scale requisition of rural collective land.The imperfect social security system in rural areas has resulted in a large number of landless farmers being transformed into urban poor people.Therefore,proper resettlement of landless farmers and the establishment of a long-term security mechanism for ensuring the basic livelihood of landless farmers are important issues that need to be resolved in the process of China’s social and economic development. 展开更多
关键词 Landless FARMERS long-term SECURITY mechanism COUNTERMEASURES
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Operational mechanism of comprehensive benefit evaluation of existing building energy efficient renovation project based on value-added life
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作者 GUO Han-ding WEI Yong-cheng +1 位作者 CUI Si-wen ZHANG Yin-xian 《Ecological Economy》 2019年第4期280-288,共9页
The comprehensive benefit evaluation of the existing building energy efficient renovation project cannot be separated from the scientific and effective evaluation mechanism.Based on the value-added life perspective,th... The comprehensive benefit evaluation of the existing building energy efficient renovation project cannot be separated from the scientific and effective evaluation mechanism.Based on the value-added life perspective,this paper analyzes the implementation subject,standard,system and principle of the comprehensive benefit evaluation of the existing building energy efficient renovation project.It plans the process of comprehensive benefit evaluation,and builds a scientific and reasonable operation platform of evaluation system,with a view to promoting the effective implementation of the comprehensive benefit evaluation of existing building energy-saving retrofits. 展开更多
关键词 energy efficient RENOVATION existing building VALUE-ADDED LIFE COMPREHENSIVE BENEFIT evaluation OPERATIONAL mechanism
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Bionic Design and Simulation Analysis of Energy⁃Efficient and Vibration⁃Damping Walking Mechanism
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作者 Rui Zhang Hao Pang +4 位作者 Yuan He Dianlei Han Lige Wen Lei Jiang Jianqiao Li 《Journal of Harbin Institute of Technology(New Series)》 CAS 2021年第4期16-24,共9页
African ostrich can run for 30 min at a speed of 60 km/h in the desert,and its hindlimb has excellent energy saving and vibration damping performance.In order to realize the energy⁃efficient and vibration⁃damping desi... African ostrich can run for 30 min at a speed of 60 km/h in the desert,and its hindlimb has excellent energy saving and vibration damping performance.In order to realize the energy⁃efficient and vibration⁃damping design of the leg mechanism of the legged robot,the principle of engineering bionics was applied.According to the passive rebound characteristic of the intertarsal joint of the ostrich foot and the characteristic of variable output stiffness of the ostrich hindlimb,combined with the proportion and size of the structure of the ostrich hindlimb,the bionic rigid⁃flexible composite legged robot single⁃leg structure was designed.The locomotion of the bionic mechanical leg was simulated by means of ADAMS.Through the motion simulation analysis,the influence of the change of the inner spring stiffness coefficient within a certain range on the vertical acceleration of the body centroid and the motor power consumption was studied,and the optimal stiffness coefficient of the inner spring was obtained to be 200 N/mm,and it was further verified that the inner and outer spring mechanism could effectively reduce the energy consumption of the mechanical leg.Simulation results show that the inner and outer spring mechanism could effectively reduce the motor energy consumption by about 72.49%. 展开更多
关键词 bionics engineering bionic mechanical leg passive rebound characteristic rigid⁃flexible composite structure energy⁃efficient and vibration⁃damping
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