The isolation, culture and the active determination of poplar ice nucleation active (INA) bacteria and the inoculation tests in laboratory and field were conducted, and the varieties, distribution and number of poplar...The isolation, culture and the active determination of poplar ice nucleation active (INA) bacteria and the inoculation tests in laboratory and field were conducted, and the varieties, distribution and number of poplar INA bacteria and its pathoge-nicity and freezing injury property were determined. The study results showed that the INA bacteria widely spread on poplar in Northeast China and caused the frozen injury for poplar under the frost condition in Spring or Autumn, which was the key factor to induce INA bacterial canker. Through evaluation and investigation of different poplar varieties and inoculation tests, fine dis-ease-resistant varieties and strains of poplar suitable for Northeast China were selected. Further tests for strong seedling showed that burying cuttings in sand and covering with plastic film could effectively avoid the frostbite, frozen and drought damage, reduce INA bacteria infection, and promote poplar growth. INA bacterial canker was detected early by highly special-ized antiserums of INA bacteria and the agglutinated test of ring-shaped boundary surface. The inducers such as streptomycin, phenylmercuric acetae, salicylic acid and heat-killed bacteria to immerse cuttings, have obvious induced disease-resistant effect. Before poplar sprouted in early spring, through spraying the solution of frostbite agent, the control effect also was obvious.展开更多
Based on the discussion of relationships between thinning and wind damage, and published information, a method for estimating risk ratios of wind damage was developed. Estimations of risk-ratio for Pinus thunbergii tr...Based on the discussion of relationships between thinning and wind damage, and published information, a method for estimating risk ratios of wind damage was developed. Estimations of risk-ratio for Pinus thunbergii trees and stands were de-duced from stem bending theory and coefficients characterizing wind profile, distribution of branches and optical stratification po-rosity. The results showed that if the value of constant b in the branch distribution-model equals the attenuation coefficient s in the wind profile model for a single tree crown, then the parameter H/D1.33 (height over stem diameter cubed) can be used to compare and evaluate the risk-ratio of wind damage for individual trees. The same method can be applied to stands using the coefficient of wind profile in a stand, i.e. attenuation coefficient , the coefficient from distributions of optical stratification porosity, i.e. extinction coefficient , and the parameter D1.33. The application of parameter H/D1.33 and the process of determining risk ra-tios of wind damage for stands were also given in the paper.展开更多
Diversity indices and abundance distribution models are statistical tools which ecologists have applied for decades for analyzing the intrinsic regularities of various ecological entities. In ...Diversity indices and abundance distribution models are statistical tools which ecologists have applied for decades for analyzing the intrinsic regularities of various ecological entities. In this work, we have applied these techniques to use the notions such as pedodiversity (as an example of geodiversity in a broad sense), in order to detect the differences and similarities between both natural resources, biological and non-biological. The discussion has mainly been conducted through the study of landform based pedodiversity analysis applied to SOTER digital databases in Hainan Island, China. The main analytical methods include indices of richness S that are the number of the categories (SOTER units relating to different soils in this work), indices based on proportional abundance of categories H' and E which are not only the number but also their relative abundance (in our case, the relative area occupied by each pedotaxa) is taken into account, models of the distribution of abundance of categories that provide the most complete description but also the least abridged and GIS mapping to show the spatial variation digitally.展开更多
Based on the information from forest resources distribution maps of Luoning County of 1983 and 1999, six indices were used to analyze spatial patterns and dynamics of forest landscapes of t...Based on the information from forest resources distribution maps of Luoning County of 1983 and 1999, six indices were used to analyze spatial patterns and dynamics of forest landscapes of the typical region in the middle of the Yihe-Luohe river basin. These indices include patch number, mean patch area, fragment index, patch extension index, etc. The results showed that: (1) There was a rapid increase in the number of patch and total area from 1983 to 1999 in the study area. The fragment degree became very high. (2) The area of all the forest patch types had witnessed great changes. The fractal degree of each forest patch type became big from 1983 to 1999. The mean extension index of Robinia pseudoacacia forest, non-forest, shrub forest, sparse forest, and Quercus species forest increased rapidly, but that of economic forest became zero. The fractal dimension each showed that forest coverage has been promoted. (3) The changes of landscape patterns were different in different geomorphic regions. From 1983 to 1999 the vegetation cover area, the gross number and the density of patch, diversity and evenness of landscape were all reduced greatly in gullies and ravines, but the maximum area and the mean area of patch types were increased. In hilly region, both the forest cover area and the number of patch increased from 1983 to 1999, but the mean area of patch was reduced greatly. In mountain region, even though the area under forest canopy reduced from 1983 to 1999, the patch number was increased greatly, the mean area of all patch types was reduced, the extension index, diversity index and evenness index of landscape were all increased. Furthermore, because of different types of land use, human activity and terrain, the vegetation changes on northern and southern mountain slopes were different. According to these analyses, the main driving forces, such as the policies of management, market economy, influence of human activities etc. are brought out.展开更多
Study on the effects of allelochemicals such as trans \|ferulic acid ( t \|FA), benzoic acid (BA) and p \|hydroxybenzoic acid ( p \|HA), isolated from decomposed wheat straw on the activity of nitrate reduct...Study on the effects of allelochemicals such as trans \|ferulic acid ( t \|FA), benzoic acid (BA) and p \|hydroxybenzoic acid ( p \|HA), isolated from decomposed wheat straw on the activity of nitrate reductase at different concentrations of allelochemicals and different pH is described. t \|FA (0.26, 2.58 and 5.15 mmol/L) and BA (4.09, 8.19 mmol/L) showed a certain inhibition to the activity of nitrate reductase. The highest inhibition rate was 18.40%, but BA (0.41 mmol/L) and p \|HA (0.36, 1.81 and 3.62 mmol/L) showed stimulation, the more strong stimulation rate was 15.80%. At pH 6 condition, the activity of nitrate reductase was stronger inhibited than pH 7 and pH 8, but the mixture of 3 allelochemicals at pH 6 showed a stimulation. The mixture, however, at pH 7 and pH 8 showed some inhibition. It was found that there was a relationship between production of NO\+-\-2 and transformation of NO\+-\-3.展开更多
Three days old cucumber (Cucumis sativus L.) was grown in a factorial design under two levels of water condition (well watered and drought) and two supplemental levels of ultraviolet\|B(280—320 nm) irradiance(0, ...Three days old cucumber (Cucumis sativus L.) was grown in a factorial design under two levels of water condition (well watered and drought) and two supplemental levels of ultraviolet\|B(280—320 nm) irradiance(0, 0\^24, 0\^42 W/m\+2) for 30 days. Plants were grown in a greenhouse under visible light with 400 μmol/(m\+2.s), day\|night temperature 32/20℃ and relative humidity 70±10%. The combination of UV\|B radiation and water stress resulted in the decrease in plant height, leaf area ratio and relative growth rate, and increase in specific leaf mass and net assimilation rate. There was almost no effect of ultraviolet\|B radiation on the contents of chlorophyll a and b under water stress. However, interactive effects of ultraviolet\|B radiation and water conditions on the content of anthocyanin were much great. UV\|B irradiance with water stress also caused a reduction in net photosynthesis, apparent quantum efficiency, gas exchange and stomatal resistance, and an increase in evaporation.展开更多
Lunan stone forest is a kind of typical karst in China, which is mainly developed under red soil. In the winter of 1999, three study sites were chosen in stone forest national park according to veget...Lunan stone forest is a kind of typical karst in China, which is mainly developed under red soil. In the winter of 1999, three study sites were chosen in stone forest national park according to vegetation cover, geomorphologic location and soil types. CO 2 concentration was measured with Gastec pump at different depths of soil (20, 40, 60 cm) and at the same time soil samples were gathered and soil properties such as soil moisture, pH, soil organic content were analyzed and the total number of viable microbes were counted in laboratory. In the study, dependent variable was chosen as the mean soil log (PCO 2 ), and soil properties were chosen as the independent variables. Multiple stepwise regression analysis showed that the total amount of microbes and soil moisture are the best indicators of the CO 2 production, with the equation LOG(PCO 2 ) = - 0.039(TNM) - 0.056(Mo) + 1.215 accounting for 86% of the variation of the soil CO 2 concentration, where TNM is the total number of microbes in the soil and Mo is the moisture of soil sample.展开更多
The repeated effects of vulnerable habitat and unreasonable human activities on the Bashang Plateau of China led the chestnut soil to degrade. It expresses in reducing soil CEC, decreasing nutrient content, decomposi...The repeated effects of vulnerable habitat and unreasonable human activities on the Bashang Plateau of China led the chestnut soil to degrade. It expresses in reducing soil CEC, decreasing nutrient content, decomposing organic complexes, and reducing humus in loose, steady and tight bond forms, respectively. The percentage of three forms are 21%—34%, 44%—55% and 5%—6.2%, respectively.展开更多
针对无线电能传输WPT(wireless power transmission)系统耦合机构发生偏移时,输出电压波动的问题,提出1种基于恒压输出区间追踪的WPT系统抗偏移方法。首先,建立CLC-S型WPT系统的模型,分析该系统在谐振和非谐振状态下的互感与输出电压增...针对无线电能传输WPT(wireless power transmission)系统耦合机构发生偏移时,输出电压波动的问题,提出1种基于恒压输出区间追踪的WPT系统抗偏移方法。首先,建立CLC-S型WPT系统的模型,分析该系统在谐振和非谐振状态下的互感与输出电压增益之间的关系,由分析可知,系统工作在非谐振状态下的恒压输出区间内抗偏移能力更强;然后,设计电感补偿序列,提出恒压输出区间追踪控制策略,实现WPT系统输出电压恒定控制,提高系统的抗偏移能力;最后,搭建仿真模型和实验平台,仿真及实验结果均表明,采用恒压输出区间追踪控制策略,可以有效减小输出电压的波动,验证了系统在强互感干扰下的鲁棒性。相较于无恒压输出区间追踪的WPT系统,所提系统具有更好的输出电压动态调节能力。展开更多
背景与目的本研究旨在探索细胞毒性T淋巴细胞相关抗原(cytotoxic T lymphocyte associated antigen-4,CTLA-4)、程序坏死因子(programmed death 1,PD-1)和程序坏死因子配体(programmed death ligand 1,PD-L1)在小细胞肺癌(small cell lu...背景与目的本研究旨在探索细胞毒性T淋巴细胞相关抗原(cytotoxic T lymphocyte associated antigen-4,CTLA-4)、程序坏死因子(programmed death 1,PD-1)和程序坏死因子配体(programmed death ligand 1,PD-L1)在小细胞肺癌(small cell lung cancer,SCLC)患者外周血中的分布情况,探索其免疫作用机制并评估其作为生物标志物的临床价值。方法招募290例SCLC患者及60例健康志愿者,收集治疗前和治疗2^(nd)周期末SCLC患者EDTA抗凝血2 mL。应用流式细胞仪检测CTLA-4、PD-1和PD-L1在外周血CD3、CD4、CD8及CD25的分布,分析其与临床病理特征的相关性;采用细胞免疫化学法和流式细胞法检测PD-L1在SCLC细胞系H446中的表达。结果 SCLC患者外周血中CTLA-4^+细胞和PD-1^+细胞水平分别为(1.56±1.24)%和(8.07±3.97)%、CTLA-4在CD3细胞和CD4细胞中的表达水平无明显差异,分别为(4.87±5.18)%和(3.85±2.60)%,均低于PD-1在CD3^+或CD4^+细胞中的表达(26.63±9.04)%和(20.79±9.41)%,与健康对照组相比,SCLC中CD4^+CD25^+CTLA-4^+细胞水平明显升高(1.91±1.27)%vs(7.09±5.09)%,P<0.001;PD-1^+(CD8^+)细胞表达水平明显降低,分别为(22.56±4.21)%vs(11.47±5.85)%,P<0.001。CD4^+CD25^+CTLA-4^+细胞或CD8^+PD-1^+细胞水平与患者的年龄、性别、吸烟状况、临床分期以及是否转移等因素无关(P>0.05)。化疗两周期末CD4^+CD25^+CTLA-4^+和CD8^+PD-1^+细胞的水平对比化疗前明显下降,分别为(5.11±2.60)%vs(6.94±4.91)%;(8.74±3.39)%vs(11.48±5.91)%,P值均<0.000,1,但与无疾病进展生存和总生存无显著相关性。PD-L1高表达于SCLC细胞系H446中并定位在细胞膜和细胞浆,但在外周血中未见表达。结论本研究首次证实SCLC外周血中CTLA4高表达于调节性T细胞中,而PD-1低表达于效应性T细胞,该结果为揭示SCLC免疫监测点免疫逃逸机制提供了理论依据,可能作为一种新的无创性且可实时监测的生物标志物。展开更多
针对单级LC谐振型电场耦合式水下无线电能传输(electrical-field coupled power transfer,ECPT)系统的输出功率低、谐振容量小、频率漂移大等关键问题,设计一种更适于海水环境下的无线电能传输系统。该系统基于CLC-S调谐网络,综合E类放...针对单级LC谐振型电场耦合式水下无线电能传输(electrical-field coupled power transfer,ECPT)系统的输出功率低、谐振容量小、频率漂移大等关键问题,设计一种更适于海水环境下的无线电能传输系统。该系统基于CLC-S调谐网络,综合E类放大器效率高、频率高等优点,实现较大的功率输出。利用Maxwell有限元仿真软件,对海水环境下耦合机构的电容值进行了有限元分析。通过对水下耦合机构进行试验,分析负载品质因数Q、归一化频率μ对水下无线电能传输系统的影响规律,可为水下ECPT系统设计提供参考。展开更多
基金National Foundation of Ninth Five-Year Plan (No. 96-005-04-01-03).
文摘The isolation, culture and the active determination of poplar ice nucleation active (INA) bacteria and the inoculation tests in laboratory and field were conducted, and the varieties, distribution and number of poplar INA bacteria and its pathoge-nicity and freezing injury property were determined. The study results showed that the INA bacteria widely spread on poplar in Northeast China and caused the frozen injury for poplar under the frost condition in Spring or Autumn, which was the key factor to induce INA bacterial canker. Through evaluation and investigation of different poplar varieties and inoculation tests, fine dis-ease-resistant varieties and strains of poplar suitable for Northeast China were selected. Further tests for strong seedling showed that burying cuttings in sand and covering with plastic film could effectively avoid the frostbite, frozen and drought damage, reduce INA bacteria infection, and promote poplar growth. INA bacterial canker was detected early by highly special-ized antiserums of INA bacteria and the agglutinated test of ring-shaped boundary surface. The inducers such as streptomycin, phenylmercuric acetae, salicylic acid and heat-killed bacteria to immerse cuttings, have obvious induced disease-resistant effect. Before poplar sprouted in early spring, through spraying the solution of frostbite agent, the control effect also was obvious.
基金This study was supported by Innovation Research Project of Chinese Academy of Sciences and the Ministry of Culture and Education Japanese Government.
文摘Based on the discussion of relationships between thinning and wind damage, and published information, a method for estimating risk ratios of wind damage was developed. Estimations of risk-ratio for Pinus thunbergii trees and stands were de-duced from stem bending theory and coefficients characterizing wind profile, distribution of branches and optical stratification po-rosity. The results showed that if the value of constant b in the branch distribution-model equals the attenuation coefficient s in the wind profile model for a single tree crown, then the parameter H/D1.33 (height over stem diameter cubed) can be used to compare and evaluate the risk-ratio of wind damage for individual trees. The same method can be applied to stands using the coefficient of wind profile in a stand, i.e. attenuation coefficient , the coefficient from distributions of optical stratification porosity, i.e. extinction coefficient , and the parameter D1.33. The application of parameter H/D1.33 and the process of determining risk ra-tios of wind damage for stands were also given in the paper.
文摘Diversity indices and abundance distribution models are statistical tools which ecologists have applied for decades for analyzing the intrinsic regularities of various ecological entities. In this work, we have applied these techniques to use the notions such as pedodiversity (as an example of geodiversity in a broad sense), in order to detect the differences and similarities between both natural resources, biological and non-biological. The discussion has mainly been conducted through the study of landform based pedodiversity analysis applied to SOTER digital databases in Hainan Island, China. The main analytical methods include indices of richness S that are the number of the categories (SOTER units relating to different soils in this work), indices based on proportional abundance of categories H' and E which are not only the number but also their relative abundance (in our case, the relative area occupied by each pedotaxa) is taken into account, models of the distribution of abundance of categories that provide the most complete description but also the least abridged and GIS mapping to show the spatial variation digitally.
基金Prominent Youth Science Foundation of Henan Province No.0003+2 种基金 No.9920 Natural Science Foundation of Henan Province No. 0111070100
文摘Based on the information from forest resources distribution maps of Luoning County of 1983 and 1999, six indices were used to analyze spatial patterns and dynamics of forest landscapes of the typical region in the middle of the Yihe-Luohe river basin. These indices include patch number, mean patch area, fragment index, patch extension index, etc. The results showed that: (1) There was a rapid increase in the number of patch and total area from 1983 to 1999 in the study area. The fragment degree became very high. (2) The area of all the forest patch types had witnessed great changes. The fractal degree of each forest patch type became big from 1983 to 1999. The mean extension index of Robinia pseudoacacia forest, non-forest, shrub forest, sparse forest, and Quercus species forest increased rapidly, but that of economic forest became zero. The fractal dimension each showed that forest coverage has been promoted. (3) The changes of landscape patterns were different in different geomorphic regions. From 1983 to 1999 the vegetation cover area, the gross number and the density of patch, diversity and evenness of landscape were all reduced greatly in gullies and ravines, but the maximum area and the mean area of patch types were increased. In hilly region, both the forest cover area and the number of patch increased from 1983 to 1999, but the mean area of patch was reduced greatly. In mountain region, even though the area under forest canopy reduced from 1983 to 1999, the patch number was increased greatly, the mean area of all patch types was reduced, the extension index, diversity index and evenness index of landscape were all increased. Furthermore, because of different types of land use, human activity and terrain, the vegetation changes on northern and southern mountain slopes were different. According to these analyses, the main driving forces, such as the policies of management, market economy, influence of human activities etc. are brought out.
基金Foundationitem :NationalNaturalScienceFoundationofChina (No .3 9790 1 0 0 )
文摘Study on the effects of allelochemicals such as trans \|ferulic acid ( t \|FA), benzoic acid (BA) and p \|hydroxybenzoic acid ( p \|HA), isolated from decomposed wheat straw on the activity of nitrate reductase at different concentrations of allelochemicals and different pH is described. t \|FA (0.26, 2.58 and 5.15 mmol/L) and BA (4.09, 8.19 mmol/L) showed a certain inhibition to the activity of nitrate reductase. The highest inhibition rate was 18.40%, but BA (0.41 mmol/L) and p \|HA (0.36, 1.81 and 3.62 mmol/L) showed stimulation, the more strong stimulation rate was 15.80%. At pH 6 condition, the activity of nitrate reductase was stronger inhibited than pH 7 and pH 8, but the mixture of 3 allelochemicals at pH 6 showed a stimulation. The mixture, however, at pH 7 and pH 8 showed some inhibition. It was found that there was a relationship between production of NO\+-\-2 and transformation of NO\+-\-3.
文摘Three days old cucumber (Cucumis sativus L.) was grown in a factorial design under two levels of water condition (well watered and drought) and two supplemental levels of ultraviolet\|B(280—320 nm) irradiance(0, 0\^24, 0\^42 W/m\+2) for 30 days. Plants were grown in a greenhouse under visible light with 400 μmol/(m\+2.s), day\|night temperature 32/20℃ and relative humidity 70±10%. The combination of UV\|B radiation and water stress resulted in the decrease in plant height, leaf area ratio and relative growth rate, and increase in specific leaf mass and net assimilation rate. There was almost no effect of ultraviolet\|B radiation on the contents of chlorophyll a and b under water stress. However, interactive effects of ultraviolet\|B radiation and water conditions on the content of anthocyanin were much great. UV\|B irradiance with water stress also caused a reduction in net photosynthesis, apparent quantum efficiency, gas exchange and stomatal resistance, and an increase in evaporation.
基金National Natural Science Foundation of China No.40071017+2 种基金 No.90202017 The Shilin Research Foundation of China No.199903
文摘Lunan stone forest is a kind of typical karst in China, which is mainly developed under red soil. In the winter of 1999, three study sites were chosen in stone forest national park according to vegetation cover, geomorphologic location and soil types. CO 2 concentration was measured with Gastec pump at different depths of soil (20, 40, 60 cm) and at the same time soil samples were gathered and soil properties such as soil moisture, pH, soil organic content were analyzed and the total number of viable microbes were counted in laboratory. In the study, dependent variable was chosen as the mean soil log (PCO 2 ), and soil properties were chosen as the independent variables. Multiple stepwise regression analysis showed that the total amount of microbes and soil moisture are the best indicators of the CO 2 production, with the equation LOG(PCO 2 ) = - 0.039(TNM) - 0.056(Mo) + 1.215 accounting for 86% of the variation of the soil CO 2 concentration, where TNM is the total number of microbes in the soil and Mo is the moisture of soil sample.
文摘The repeated effects of vulnerable habitat and unreasonable human activities on the Bashang Plateau of China led the chestnut soil to degrade. It expresses in reducing soil CEC, decreasing nutrient content, decomposing organic complexes, and reducing humus in loose, steady and tight bond forms, respectively. The percentage of three forms are 21%—34%, 44%—55% and 5%—6.2%, respectively.
文摘针对无线电能传输WPT(wireless power transmission)系统耦合机构发生偏移时,输出电压波动的问题,提出1种基于恒压输出区间追踪的WPT系统抗偏移方法。首先,建立CLC-S型WPT系统的模型,分析该系统在谐振和非谐振状态下的互感与输出电压增益之间的关系,由分析可知,系统工作在非谐振状态下的恒压输出区间内抗偏移能力更强;然后,设计电感补偿序列,提出恒压输出区间追踪控制策略,实现WPT系统输出电压恒定控制,提高系统的抗偏移能力;最后,搭建仿真模型和实验平台,仿真及实验结果均表明,采用恒压输出区间追踪控制策略,可以有效减小输出电压的波动,验证了系统在强互感干扰下的鲁棒性。相较于无恒压输出区间追踪的WPT系统,所提系统具有更好的输出电压动态调节能力。
文摘背景与目的本研究旨在探索细胞毒性T淋巴细胞相关抗原(cytotoxic T lymphocyte associated antigen-4,CTLA-4)、程序坏死因子(programmed death 1,PD-1)和程序坏死因子配体(programmed death ligand 1,PD-L1)在小细胞肺癌(small cell lung cancer,SCLC)患者外周血中的分布情况,探索其免疫作用机制并评估其作为生物标志物的临床价值。方法招募290例SCLC患者及60例健康志愿者,收集治疗前和治疗2^(nd)周期末SCLC患者EDTA抗凝血2 mL。应用流式细胞仪检测CTLA-4、PD-1和PD-L1在外周血CD3、CD4、CD8及CD25的分布,分析其与临床病理特征的相关性;采用细胞免疫化学法和流式细胞法检测PD-L1在SCLC细胞系H446中的表达。结果 SCLC患者外周血中CTLA-4^+细胞和PD-1^+细胞水平分别为(1.56±1.24)%和(8.07±3.97)%、CTLA-4在CD3细胞和CD4细胞中的表达水平无明显差异,分别为(4.87±5.18)%和(3.85±2.60)%,均低于PD-1在CD3^+或CD4^+细胞中的表达(26.63±9.04)%和(20.79±9.41)%,与健康对照组相比,SCLC中CD4^+CD25^+CTLA-4^+细胞水平明显升高(1.91±1.27)%vs(7.09±5.09)%,P<0.001;PD-1^+(CD8^+)细胞表达水平明显降低,分别为(22.56±4.21)%vs(11.47±5.85)%,P<0.001。CD4^+CD25^+CTLA-4^+细胞或CD8^+PD-1^+细胞水平与患者的年龄、性别、吸烟状况、临床分期以及是否转移等因素无关(P>0.05)。化疗两周期末CD4^+CD25^+CTLA-4^+和CD8^+PD-1^+细胞的水平对比化疗前明显下降,分别为(5.11±2.60)%vs(6.94±4.91)%;(8.74±3.39)%vs(11.48±5.91)%,P值均<0.000,1,但与无疾病进展生存和总生存无显著相关性。PD-L1高表达于SCLC细胞系H446中并定位在细胞膜和细胞浆,但在外周血中未见表达。结论本研究首次证实SCLC外周血中CTLA4高表达于调节性T细胞中,而PD-1低表达于效应性T细胞,该结果为揭示SCLC免疫监测点免疫逃逸机制提供了理论依据,可能作为一种新的无创性且可实时监测的生物标志物。
文摘针对单级LC谐振型电场耦合式水下无线电能传输(electrical-field coupled power transfer,ECPT)系统的输出功率低、谐振容量小、频率漂移大等关键问题,设计一种更适于海水环境下的无线电能传输系统。该系统基于CLC-S调谐网络,综合E类放大器效率高、频率高等优点,实现较大的功率输出。利用Maxwell有限元仿真软件,对海水环境下耦合机构的电容值进行了有限元分析。通过对水下耦合机构进行试验,分析负载品质因数Q、归一化频率μ对水下无线电能传输系统的影响规律,可为水下ECPT系统设计提供参考。
