动词词库模型之解释力

汉语生成语法学者引用黑尔和凯泽提出的英语中的动词论元结构来诠释汉语事实 ,颇具创意。运用这种动词词库模型 ,分析一价动词句、施—动—受句、主宾易位句、双宾语句、得字句、频次补语句、时量补语句、整体—部分句等 8种结构 ,并分析了Move α、把字结构、动词再分析、动词复叠等 4种变化的不同映现 。

α-硫辛酸对训练大鼠体内糖储备及运动能力的影响

采用SD大鼠进行大强度耐力训练,同时服用α-硫辛酸,6周后取材测定血糖、肝糖原、肌糖原、血清胰岛素、胰高血糖素,探讨α-硫辛酸对训练大鼠糖储备和运动能力的影响.结果表明,通过大强度耐力训练,服用α-硫辛酸的大鼠血糖、肝糖原、肌糖原、胰岛素和胰高血糖素水平均显著高于运动对照组(P<0.01);服用α-硫辛酸的大鼠运动能力明显提高,与运动对照组相比,具有极显著性差异(P<0.01).说明α-硫辛酸可使大强度耐力训练大鼠体内糖储备显著增加,同时可以提高胰岛激素水平,并提高了运动能力.

改进的基于α扩展移动的立体匹配算法

针对传统的α扩展移动立体匹配算法计算时间过长的问题,提出了一种改进的α扩展移动算法。改进算法在α扩展移动的外部循环过程中建立了一种新的循环机制,构造的参数满足循环停止的条件时提前停止循环,节省大部分低效率的循环时间;在算法的内部迭代过程中优化了α的设定顺序,使得能量函数更快地收敛。实验结果表明,改进的算法可以与原始算法获得几乎一致的精确视差图,并大大缩短了算法的运算时间。

α-Fe自身注入引起的损伤研究(英文)

用27keV的^(57)Fe离子注入金属铁箔,注入剂量在2×10^(16)到5×10^(16)个/cm^2之间。由内转换电子穆斯堡尔谱观察到存在三个铁原子位:未受扰动的α-Fe原子位、同一个空穴相连结的铁原子位、以及同二个或更多空穴相结合的铁原子位。据三种位的铁原子不同的退火行为,得到单空穴迁移的温度和能量分别为100℃和0.9eV左右,空穴的热释放能量大约为1.1eV。

分数低阶时频滑动平均模型参数估计

针对稳定分布环境下非平稳过程分析方法时频滑动平均(TFMA)模型算法的退化,引入分数低阶统计量共变,提出了一种改进的分数低阶时频时频滑动平均(FLO-TFMA)模型算法。推导了FLO-TFMA模型的参数求解过程,给出了基于FLO-TFMA模型的时频谱估计。通过在稳定分布环境下对TFMA模型算法和所提出的FLO-TFMA模型算法的参数估计均方误差(MSE)比较和时频谱估计比较,仿真结果表明,FLO-TFMA模型算法的参数估计精度优于TFMA模型算法,TFMA模型时频谱估计完全失效,而FLO-TFMA模型时频谱算法能较好地进行时频谱估计。

基于模糊相似度的地面目标跟踪算法研究

研究了基于Dempster-Shafer证据理论和模糊相似度的地面运动目标识别与跟踪问题。应用Dempster-Shafer证据理论对地面运动目标进行身份识别,用目标的类型、速度和数量等属性构造目标的模糊相似度,利用模糊相似度作为目标跟踪的主要依据。详细地分析了地理信息,提出了基于证据推理的地面运动目标识别与跟踪算法,并且用α-β滤波器更新目标位置和速度。经过实际外场试验运行表明,该算法是有效的。

基于α-β-γ滤波的迫击炮定位

针对迫击炮的侦察定位问题,介绍了一种基于α-β-γ滤波的定位方法。该方法首先根据外弹道学确定弹丸飞行的质心运动方程,然后利用常增益的α-β-γ滤波跟踪求解弹丸的运动参数,最后通过龙格-库塔(Runge-Kutta)方法求解质心运动方程,并外推求得炮位位置。仿真结果表明,该方法在保证较高迫击炮定位精度的同时实时性能较传统方法大幅提升,有显著的工程意义。

移动对象的K个连续最近邻查询算法

给定一个移动查询点和一个移动对象集合,由于查询和数据对象的位置都是连续变化的,因此不能依赖于给出的固定参考位置来解决查询问题.为了解决移动对象的K个连续最近邻查询,在TPR树的基础上,提出了分界时间的概念,利用α剪枝技术给出了查询算法.利用模拟试验证明了该算法的时间复杂度比其他算法有较大改善.

The Impact of Diferent Vertical Difusion Schemes in a Three-Dimensional Oil Spill Model in the Bohai Sea

Vertical transport is critical to the movement of oil spills in seawater. Breaking waves play an important role by developing a well-defined mixing layer in the upper part of the water column. A three-dimensional （3-D） Lagrangian random walk oil spill model was used here to study the influence of sea surface waves on the vertical turbulence movement of oil particles. Three vertical diffusion schemes were utilized in the model to compare their impact on oil dispersion and transportation. The first scheme calculated the vertical eddy viscosity semi-empirically. In the second scheme, the vertical diffusion coefficient was obtained directly from an Eulerian hydrodynamic model （Princeton Ocean Model, POM2k） while considering wave- caused turbulence. The third scheme was formulated by solving the Langevin equation. The trajectories, percentages of oil particles intruding into water, and the vertical distribution structures of oil particles were analyzed for a series of numerical experiments with different wind magnitudes. The results showed that the different vertical diffusion schemes could generate different horizontal trajectories and spatial distributions of oil spills on the sea surface. The vertical diffusion schemes caused different water-intruding and resurfacing oil particle behaviors, leading to different horizontal transport of oil particles at the surface and subsurface of the ocean. The vertical diffusion schemes were also applied to a realistic oil spill simulation, and these results were compared to satellite observations. All three schemes yielded acceptable results, and those of the third scheme most closely simulated the observed data.

空间图D_3的边同伦分类

如果空间图G的两个嵌入可以由自交叉变换和空间合痕相互转化,则称这两个嵌入是边同伦的.将证明空间图D3的任意两个空间嵌入f和g是边同伦的当且仅当α(f)=α(g),并且给出了D3的边同伦分类列表.

中药药油走罐法联合NB-UVB照射治疗银屑病临床观察

[目的]观察中药药油走罐法联合NB-UVB照射治疗寻常型斑块状银屑病的疗效及对血清肿瘤坏死因子α(TNF-α)、白细胞介素17(IL-17)、白细胞介素23(IL-23)水平的影响。[方法]将符合纳入标准的60例患者,随机分为治疗组30例、对照组30例。治疗组予中药药油走罐联合NB-UVB照射治疗,对照组单用NBUVB照射治疗。治疗8周后,比较两组银屑病面积和严重程度指数(PASI)及血清TNF-α、IL-17、IL-23的水平变化,并评估疗效。[结果]治疗后两组的PASI评分及血清TNF-α、IL-17、IL-23水平均明显下降,但治疗组下降更显著(P<0.05)。治疗组总有效率为86.67%,对照组为66.67%,两组疗效比较,差异有统计学意义(P<0.05)。[结论]中药药油走罐联合NB-UVB照射治疗银屑病疗效明显优于单用NB-UVB照射,其机制可能是通过降低血清TNF-α、IL-17、IL-23等炎症因子水平来达到治疗目的。

移动α基于界限限制分析的理据

基于界限限制的分析认为,任何移动都必须受到移动范围的限制,此移动范围规定一次移动最大能跨越的节点,超过此节点范围便违反了界限原则。在和基于非界限限制分析的对比中我们发现,基于界限限制的方法在分析移动α的各种转换形式的过程中,更加具有说服力。

非理想电网下三相逆变器的锁相方法研究

在大规模新能源并网发电场合,电网常处于三相不平衡、谐波畸变、频率波动等非理想电网状态。为了改善并网逆变器在非理想电网条件下的控制性能,提出了一种基于新型滑动平均滤波器的锁相环(NMAFPLL)。NMAF可在α-β坐标系下滤除输入信号中的直流分量、谐波分量及基波负序分量,提取基波正序分量。进一步,进行了NMAF频率自适应设计,当电网基波频率突变时,能够实时跟踪基波频率变化,有效地减小了锁相误差。仿真和实验结果表明,所提出的NMAF-PLL锁相方法能够快速准确地从非理想电网电压信号中提取基波正序分量,并锁定其频率和相位,具有较好的动态和稳态性能。

Fundamental Properties and Optimal Gains of a Steady-State Velocity Measured <i>α</i>-<i>β</i>Tracking Filter

This paper clarifies the steady-state properties and performance of an α-β filter for moving target tracking using both position and velocity measurements. We call this filter velocity measured α-β (VM-α-β) filter. We first derive the stability condition and steady-state predicted errors as fundamental properties of the VM-α-β filter. The optimal gains for representative motion models are then derived from the Kalman filter equations. Theoretical and numerical analyses verify that VM-α-β filters with these optimal gains realize more accurate tracking than conventional α-β filters when the filter gains are relatively large. Our study reveals the conditions under which the predicted errors of the VM-α-β filters are less than those of conventional α-β filters. Moreover, numerical simulations clarify that the variance of the tracking error of the VM-α-β filters is approximately 3/4 of that of the conventional α-β filters in realistic situations, even when the accuracy of the position/velocity measurements is the same.

论形式和功能的统一是语法分析的根本基础——兼谈转换语法的一些发展

本文指出语法研究应该以形式-意义间的一致性这一最简单状态为起点,然后寻找偏离这种一致状态的原因。意义可以分认知意义和语用意义,跟它们对应的相应形式分别为反映距离近远的轨层结构和反映时间先后的线形语序,这两对因素互相制约。此外,成份的大小跟位置之间的互动因素也对语言形式有极大的制约作用。本文也讨论了转换语法从发掘限制到发掘动因的进展。

α-Sutte、SARIMA及其组合模型在甲肝发病率预测中的应用效果比较

目的 比较α-sutte、SARIMA及其组合模型(SutteSARIMA)在甲肝发病率预测中的应用效果,为优化甲肝预测模型提供参考。方法 收集2004—2017年全国甲肝逐月发病率数据。以2004年1月—2017年6月数据作为训练集,2017年7—12月数据作为测试集。利用训练数据分别训练α-sutte、SARIMA及SutteSARIMA模型。利用训练模型预测2017年7—12月发病率,并与测试集比较。采用平均绝对误差百分比(Mean Absolute Percentage Error, MAPE),平均绝对误差(Mean Absolute Error, MAE),均方根误差(Root Mean Squared Error, RMSE)和平均误差率(Mean ErrorRate, MER)评价模型拟合及预测效果。结果 α-sutte、SutteSARIMA模型残差均在0附近波动。α-sutte、SARIMA及SutteSARIMA模型拟合的MAPE、MAE、RMSE、MER依次为7.68%、0.02、0.03、6.34%,12.10%、0.03、0.05、12.18%,7.72%、0.02、0.03、7.27%;预测的MAPE、MAE、RMSE、MER依次为17.13%、 0.02、0.02、16.17%,15.32%、0.02、0.02、15.54%,5.88%、0.01、0.01、5.80%。SARIMA(1,1,3)(2,1,1)12为最优SARIMA模型。结论 SutteSARIMA为最优模型,适于全国甲肝发病率的预测,值得推广至其他疾病的预测。

Using repeated precise gps campaigns for research of present-day crustal movement and strain in the Qinghai-Tibetan Plateau

The problem of crustal movement in the Qing-hai-Tibetan Plateau is a hotstopic of the present-day international geodetic world. GPS observations in 1993, 1995 and 1997 are used to survey the three-dimensional displacement of GPS monitoring station in the Qinghai-Tibetan Plateau, and to calculate and analyze the present-day crustal movement and strain in the Qinghai-Tibetan Plateau. The result of repeated campaign shows that the crustal movement in the Qinghai-Tibetan Plateau is still compressing in the north and south directions, extending in the west and east directions, and uplifting in the vertical direction. The relative convergence velocity of the Himalayan block is approximately (19.5±1.7)mm/a, the strain velocity is about (5.5±6.0) mm/a, and the uplifting velocity is some (7.6±5.2) mm/a. The compression velocity of the Tibet block relative to Golmud in the north and south directions is (9.3±4.6) mm/a, the strain velocity of the middle part in the west and east directions is (15.6±6.3) mm/a,

α-Sutte模型在疫情预测中的应用:基于R软件

目的 介绍α-Sutte模型的原理、方法,并利用R软件建立α-Sutte模型。比较α-Sutte模型与乘积季节自回归移动平均模型(SARIMA)拟合及预测效果,为α-Sutte模型在疫情预测中的应用提供参考。方法 收集2020年1月1日至2021年7月16日印度、美国、意大利、巴西、俄罗斯、南非各国新型冠状病毒肺炎(COVID-19)逐日累计报告病例数。以首例报告病例时间作为起点,起始日期至2021年6月16日数据作为训练数据,2021年6月17日至2021年7月16日作为测试数据。利用R语言根据α-Sutte模型计算公式自行编写拟合及预测函数α-Sutte。训练数据被用于训练α-Sutte模型和SARIMA模型。建立2个模型预测2021年6月17日至2021年7月16日COVID-19逐日报告病例数。拟合值与训练数据比较、预测值与测试数据比较评价模型拟合及预测效果。采用评价指标为平均绝对误差百分比(MAPE)。结果 印度、美国、意大利、巴西、俄罗斯和南非建立的最优SARIMA模型为SARIMA(5,2,2)、SARIMA(0,2,2)、SARIMA(2,2,2)、SARIMA(3,2,2)、SARIMA(0,2,1)和SARIMA(4,2,3)。α-Sutte和SARIMA模型在印度、美国、意大利、巴西、俄罗斯、南非6个国家拟合的MAPE分别为1.32%、1.34%、0.89%、1.65%、0.99%、0.99%,以及1.51%、1.59%、0.89%、1.67%、1.03%、1.13%。α-Sutte和SARIMA模型在6个国家预测的MAPE分别为0.81%、0.09%、0.13%、1.58%、1.73%、3.77%,以及0.09%、0.09%、0.18%、1.13%、1.83%、3.43%。结论 α-Sutte模型的原理、建模简单,利用R语言建立的模型拟合及预测精度高,值得在疾病监测领域推广使用。

Characteristics of Water Infiltration in Layered Water-Repellent Soils

Water-repellent(WR) soil greatly influences infiltration behavior. This research determined the impacts of WR levels of silt loam soil layer during infiltration. Three column scenarios were utilized, including homogeneous wettable silt loam or sand, silt loam over sand(silt loam/sand), and sand over silt loam(sand/silt loam). A 5-cm thick silt loam soil layer was placed either at the soil surface or 5 cm below the soil surface. The silt loam soil used had been treated to produce different WR levels, wettable, slightly WR, strongly WR, and severely WR. As the WR level increased from wettable to severely WR, the cumulative infiltration decreased. Traditional wetting front-related equations did not adequately describe the infiltration rate and time relationships for layered WR soils. The Kostiakov equation provided a good fit for the first infiltration stage. Average infiltration rates for wettable, slightly WR, strongly WR, and severely WR during the 2 nd infiltration stage were 0.126, 0.021, 0.002, and 0.001 mm min^(-1) for the silt loam/sand scenario,respectively, and 0.112, 0.003, 0.002, and 0.000 5 mm min^(-1) for the sand/silt loam scenario, respectively. Pseudo-saturation phenomena occurred when visually examining the wetting fronts and from the apparent changes in water content(?θ_(AP)) at the slightly WR,strongly WR, and severely WR levels for the silt loam/sand scenario. Much larger ?θAPvalues indicated the possible existence of finger flow. Delayed water penetration into the surface soil for the strongly WR level in the silt loam/sand scenario suggested negative water heads with infiltration times longer than 10 min. The silt loam/sand soil layers produced sharp transition zones of water content. The WR level of the silt loam soil layer had greater effects on infiltration than the layer position in the column.

A new insight into the nature of seasonal variations in coordinate time series of GPS sites located near active faults

This study provides new insights into the nature of seasonal variations in coordinate time series of GPS sites located near active faults and methods of their modeling. Monthly averaged coordinate time series were analyzed for several pairs of collocated GPS sites situated near the active fault intersection area, in close proximity to the central part of the northern boundary of the Amurian plate and the vicinity of the San Andreas Fault zone. It is concluded that the observed seasonal variations are best described by a breather function which is one of the solutions of the well-known sine-Gordon equation. The obtained results suggest that, in this case, the source of seasonal variations may be caused by the appearance of solitary strain waves in the fault intersection system, which may be qualitatively treated as standing waves of compression-extension of the geological medium. Based on statistical testing, the limits of applicability of the suggested model have been established.