为改善传统N-Calculator模型的局限性,加强食物氮足迹核算结果与环境影响的联系,提高活性氮管理预见性,将N-Calculator模型与食物系统养分流动(Nutrient Flows in Food Chains,Environment and Resources Use,NUFER)模型进行耦合,以估...为改善传统N-Calculator模型的局限性,加强食物氮足迹核算结果与环境影响的联系,提高活性氮管理预见性,将N-Calculator模型与食物系统养分流动(Nutrient Flows in Food Chains,Environment and Resources Use,NUFER)模型进行耦合,以估算我国2001—2020年人均食物氮足迹,建立组合预测体系。结果显示:2001—2020年,我国人均食物氮足迹由16.04 kg N/a增至18.95 kg N/a;全国食物氮足迹由20.47 Mt N/a增至26.76 Mt N/a;居民饮食结构正由以植物源食物为主的低氮消费模式转向以动物源食物为主的高氮消费模式;食物生产过程产生的活性氮的最终归宿为大气(64.3%)、水体和深层土壤(35.7%);我国食物氮足迹与人均可支配收入、城市化率、动物源食物消费氮占比呈正相关性,与恩格尔系数呈负相关性;未来10 a我国人均食物氮足迹呈增长趋势,预测结果显示年均增幅为0.16 kg N/a。展开更多
Binary Offset Carrier(BOC) has been chosen as one of modulation methods in the future Global Navigation Satellite Systems(GNSS). Even though BOC signals can bring several advantages such as better track performance an...Binary Offset Carrier(BOC) has been chosen as one of modulation methods in the future Global Navigation Satellite Systems(GNSS). Even though BOC signals can bring several advantages such as better track performance and higher positioning accuracy, there is a drawback that the autocorrelation functions have multiple side-peaks if BOC modulation is adopted. This characteristic will lead to false acquisition and the tracking loop will be locked in false phase point. The proposed Correlation Combination Ambiguity Removing Technology(CCART) cancelled all the side-peaks of the sine-phased BOC(kn,n) signals completely by making use of two kinds of correlation functions. Two kinds of sub-correlation functions were combined separately and then final correlation function without side-peaks was acquired. The simulation results are given and compared with other techniques. It is shown that acquisition will not be degraded with the increase of k.展开更多
Creative N+N compounds,also known as metaphor or metonymy N+N compounds,are a productive approach to form new words.This category of words is large in number and semantically complex.Research has demonstrated that the...Creative N+N compounds,also known as metaphor or metonymy N+N compounds,are a productive approach to form new words.This category of words is large in number and semantically complex.Research has demonstrated that the creativity of creative N+N compounds stems from the abstract and figurative thinking of people’s cognitive mechanisms.Abstract thinking facilitates the construction of abstract concepts of nouns,while figurative thinking draws connections within and between noun concepts through association and imagination.Metaphor is a source of creative words and meanings,and Lakoff and Johnson’s conceptual metaphor theory is a favorable illustration of this innovative process.Additionally,it contributes to the development of cognitive thinking skills and creative abilities.The study of creative N+N compounds helps English learners expand their vocabulary,enhance their lexical sensitivity,and promote metaphorical thinking.From a cognitive linguistic perspective,this study focuses on the cognitive mechanisms of creative N+N compounds and reveals their advantageous implications for English vocabulary teaching.展开更多
针对低温多晶硅(low temperature poly-silicon,LTPS)和低温多晶氧化物(low temperature polycrystalline oxide,LTPO)工艺下的有机电致发光显示器(organic light emitting diode,OLED)电路设计时,驱动译码电路瞬态产生大电流引起的闩...针对低温多晶硅(low temperature poly-silicon,LTPS)和低温多晶氧化物(low temperature polycrystalline oxide,LTPO)工艺下的有机电致发光显示器(organic light emitting diode,OLED)电路设计时,驱动译码电路瞬态产生大电流引起的闩锁效应烧坏器问题,提出一种具有瞬态电流限制能力的全N增强型金属氧化物半导体(N-enhancement type metal oxide semiconductor,NMOS)场效应管的译码器电路设计方法。该方法基于树状网络进行译码和限流,利用支路简并方法进行逻辑化简,采用共源共栅结构中的输出阻抗限制译码瞬态过程的最大电流;在SMIC 180 nm CMOS工艺下完成设计,核心电路面积为470.69μm^(2)。2种不同输入条件下的仿真结果表明,采用格雷码对输入激励进行编码的5-32全NMOS译码器的功耗延迟积仅为9.77×10^(-20)J·s,比同等工艺、电源电压、温度条件下设计的CMOS 5-32译码器降低了81.8%;瞬态译码时的最大电流为11.69μA,比CMOS 5-32译码器降低了99.44%。展开更多
Progenies derived from crosses between Solarium tuberosum and 2n pollen-Producing diploid hybrids, exhibit obvious hybrid vigor. The 2n pollen-producing clone can act as a bridge in crossing S. tuberosum and S. andige...Progenies derived from crosses between Solarium tuberosum and 2n pollen-Producing diploid hybrids, exhibit obvious hybrid vigor. The 2n pollen-producing clone can act as a bridge in crossing S. tuberosum and S. andigena with S. phureja. Populations from 4x-2x crosses show more unifomity and less segregation compared with that of 4x-4x crosses.The parent-offspring correlation for the traits, starch content and tuber number, is significant at 0.01 level. The regrssion equations are Y (mp-F1)=1.0 + 1.2x and Y (mp - F1) = 5.3 + 0.8x, respectively. The 2n pollen-producing clones play an impotant role in increasing tuber stach content.Estimates of the combining ability for the main yield components indicate that additive effect prodominatcs for such trais as plot yield, tuber weight per plant and starch content, whereas both additive and non-additive effects lay equal stress on mean tuber weight and non-additive effect is important for tuber number. In general, non-additive effect appears to be important in the progenies of 4x-2x crosses.Tuber number shows apparent heterosis while mean tuber weight dos not. Thus, it is necessary for 2n pollen-producing clones to be selected for high mean tuber weight and low tuber number before their use in commercial potato production.In the double cropping region of Anhui, the 4x - 2x hybrids seem to be more adaptive than S. tuberosum x S. andigena hybrids, but the yield of 4x - 2x cross is lower than that of the cross S. tuberosum x S. andigena in Harbin region.In Harbin region, the better combination type is in the from of S. andigena x (phureja-haploid Group tuberosum), and the best cross is also in the from. In Anhui, the better combination type is S. tuberosum x (phureja - haploid Group tuberosum), and the best cross is that using a variety of S. tuberosum as its parent. The progeny tubers of 4x - 2x cross have a short dormant period and are suitable for the double cropping region.展开更多
目的探讨乙酰半胱氨酸对肺纤维化合并肺气肿(combined pulmonary fibrosis and emphysema,CPFE)综合征患者氧化应激指标和肺功能的影响。方法将112例CPFE综合征患者随机分为处理组与对照组,各56例,两组都给予西医常规抗炎、支气管扩张...目的探讨乙酰半胱氨酸对肺纤维化合并肺气肿(combined pulmonary fibrosis and emphysema,CPFE)综合征患者氧化应激指标和肺功能的影响。方法将112例CPFE综合征患者随机分为处理组与对照组,各56例,两组都给予西医常规抗炎、支气管扩张剂及氧疗等基本治疗,处理组除了给予基本治疗,还给予口服乙酰半胱氨酸治疗。抽取受试者早晨空腹静脉血,运用化学比色法测定两组患者治疗前后血MDA、GSH-Px和SOD含量,并且比较两组患者治疗前后FEV1、FVC、DLCOSB。结果处理组治疗后与对照组治疗后比较MDA明显下降(P<0.01),GSH-Px和SOD明显升高(P<0.05,P<0.01),处理组患者治疗后FEV1、FVC、DLCOSB的改善情况均优于对照组(P<0.05,P<0.01)。结论 N-乙酰半胱氨酸用于治疗CPFE综合征具有抗氧化、改善肺功能(尤其是肺的弥散功能)的作用。展开更多
文摘为改善传统N-Calculator模型的局限性,加强食物氮足迹核算结果与环境影响的联系,提高活性氮管理预见性,将N-Calculator模型与食物系统养分流动(Nutrient Flows in Food Chains,Environment and Resources Use,NUFER)模型进行耦合,以估算我国2001—2020年人均食物氮足迹,建立组合预测体系。结果显示:2001—2020年,我国人均食物氮足迹由16.04 kg N/a增至18.95 kg N/a;全国食物氮足迹由20.47 Mt N/a增至26.76 Mt N/a;居民饮食结构正由以植物源食物为主的低氮消费模式转向以动物源食物为主的高氮消费模式;食物生产过程产生的活性氮的最终归宿为大气(64.3%)、水体和深层土壤(35.7%);我国食物氮足迹与人均可支配收入、城市化率、动物源食物消费氮占比呈正相关性,与恩格尔系数呈负相关性;未来10 a我国人均食物氮足迹呈增长趋势,预测结果显示年均增幅为0.16 kg N/a。
基金supported in part by National Natural Science Foundation of China under Grant No.61372110National High Technology Research and Development Program of China (863 Program) under Grant No. 2012AA120802
文摘Binary Offset Carrier(BOC) has been chosen as one of modulation methods in the future Global Navigation Satellite Systems(GNSS). Even though BOC signals can bring several advantages such as better track performance and higher positioning accuracy, there is a drawback that the autocorrelation functions have multiple side-peaks if BOC modulation is adopted. This characteristic will lead to false acquisition and the tracking loop will be locked in false phase point. The proposed Correlation Combination Ambiguity Removing Technology(CCART) cancelled all the side-peaks of the sine-phased BOC(kn,n) signals completely by making use of two kinds of correlation functions. Two kinds of sub-correlation functions were combined separately and then final correlation function without side-peaks was acquired. The simulation results are given and compared with other techniques. It is shown that acquisition will not be degraded with the increase of k.
文摘Creative N+N compounds,also known as metaphor or metonymy N+N compounds,are a productive approach to form new words.This category of words is large in number and semantically complex.Research has demonstrated that the creativity of creative N+N compounds stems from the abstract and figurative thinking of people’s cognitive mechanisms.Abstract thinking facilitates the construction of abstract concepts of nouns,while figurative thinking draws connections within and between noun concepts through association and imagination.Metaphor is a source of creative words and meanings,and Lakoff and Johnson’s conceptual metaphor theory is a favorable illustration of this innovative process.Additionally,it contributes to the development of cognitive thinking skills and creative abilities.The study of creative N+N compounds helps English learners expand their vocabulary,enhance their lexical sensitivity,and promote metaphorical thinking.From a cognitive linguistic perspective,this study focuses on the cognitive mechanisms of creative N+N compounds and reveals their advantageous implications for English vocabulary teaching.
文摘针对低温多晶硅(low temperature poly-silicon,LTPS)和低温多晶氧化物(low temperature polycrystalline oxide,LTPO)工艺下的有机电致发光显示器(organic light emitting diode,OLED)电路设计时,驱动译码电路瞬态产生大电流引起的闩锁效应烧坏器问题,提出一种具有瞬态电流限制能力的全N增强型金属氧化物半导体(N-enhancement type metal oxide semiconductor,NMOS)场效应管的译码器电路设计方法。该方法基于树状网络进行译码和限流,利用支路简并方法进行逻辑化简,采用共源共栅结构中的输出阻抗限制译码瞬态过程的最大电流;在SMIC 180 nm CMOS工艺下完成设计,核心电路面积为470.69μm^(2)。2种不同输入条件下的仿真结果表明,采用格雷码对输入激励进行编码的5-32全NMOS译码器的功耗延迟积仅为9.77×10^(-20)J·s,比同等工艺、电源电压、温度条件下设计的CMOS 5-32译码器降低了81.8%;瞬态译码时的最大电流为11.69μA,比CMOS 5-32译码器降低了99.44%。
文摘Progenies derived from crosses between Solarium tuberosum and 2n pollen-Producing diploid hybrids, exhibit obvious hybrid vigor. The 2n pollen-producing clone can act as a bridge in crossing S. tuberosum and S. andigena with S. phureja. Populations from 4x-2x crosses show more unifomity and less segregation compared with that of 4x-4x crosses.The parent-offspring correlation for the traits, starch content and tuber number, is significant at 0.01 level. The regrssion equations are Y (mp-F1)=1.0 + 1.2x and Y (mp - F1) = 5.3 + 0.8x, respectively. The 2n pollen-producing clones play an impotant role in increasing tuber stach content.Estimates of the combining ability for the main yield components indicate that additive effect prodominatcs for such trais as plot yield, tuber weight per plant and starch content, whereas both additive and non-additive effects lay equal stress on mean tuber weight and non-additive effect is important for tuber number. In general, non-additive effect appears to be important in the progenies of 4x-2x crosses.Tuber number shows apparent heterosis while mean tuber weight dos not. Thus, it is necessary for 2n pollen-producing clones to be selected for high mean tuber weight and low tuber number before their use in commercial potato production.In the double cropping region of Anhui, the 4x - 2x hybrids seem to be more adaptive than S. tuberosum x S. andigena hybrids, but the yield of 4x - 2x cross is lower than that of the cross S. tuberosum x S. andigena in Harbin region.In Harbin region, the better combination type is in the from of S. andigena x (phureja-haploid Group tuberosum), and the best cross is also in the from. In Anhui, the better combination type is S. tuberosum x (phureja - haploid Group tuberosum), and the best cross is that using a variety of S. tuberosum as its parent. The progeny tubers of 4x - 2x cross have a short dormant period and are suitable for the double cropping region.
