"缪篆" 考论

确定“缪篆”一词产生的时代,是正确揭示“缪篆”性质的起点。“缪篆”和“摹印”功用一样,但风格有异,“摹印”与“缪篆”之间存在着一个发展过程;“缪篆”指的不是有谬误的篆文,也不是笔画屈曲缠绕的字体,而是指汉武帝太初至王莽居摄时期臻于成熟的汉印文字,其特点是笔画饱满、结体方正、风格整肃。     

曲柄摇杆机构极位夹角新定义及按K作图解设计方法的探讨

本文就曲柄摇杆机构急回运动分析中所涉及到的几个问题，如曲柄摇杆机构极位夹角θ的定义问题，行程速比系数K的表达式以及根据K值图解设计四杆机构的方法提出了一些新的见解。     

一种可控高速脉冲产生技术的研究

提出了一种将高速脉冲信号产生转换为可控直流电平产生、脉冲频率信息产生及脉冲合成输出的设计思想。可控直流电平控制脉冲的高低电平值;脉冲所需的频率信息通过可编程数字信号产生,该数字信号控制脉冲的波形包括脉宽和延迟;而脉冲的上升/下降时间则通过调整脉冲合成电路的充放电电流来控制。产生脉冲最小脉宽5ns,最大幅度7V,电平精度0.1V,最小上升/下降时间2ns。     

Computational Comparison Studies of Quadratic Assignment Like Formulations for the In Silico Sequence Selection Problem in De Novo Protein Design

In this paper an O(n²) mathematical formulation for in silico sequence selection in de novo protein design proposed by Klepeis et al. (2003, 2004), in which the number of additional variables and linear constraints scales with the square of the number of binary variables, is compared to three O(n) formulations. It is found that the O(n²) formulation is superior to the O(n) formulations on most sequence search spaces. The superiority of the O(n²) formulation is due to the reformulation linearization techniques (RLTs), since the O(n²) formulation without RLTs is found to be computationally less efficient than the O(n) formulations. In addition, new algorithmic enhancing components of RLTs with inequality constraints, triangle inequalities, and Dead-End Elimination (DEE) type preprocessing are added to the O(n²) formulation. The current best O(n²) formulation, which is the original formulation from Klepeis et al. (2003, 2004) plus DEE type preprocessing, is proposed for in silico sequence search. For a test problem with a search space of 3.4×10⁴⁵ sequences, this new improved model is able to reduce the required CPU time by 67%.     

气关笔力韵由墨彩--黄宾虹对"六法"之独见

谢赫提出"六法"以来,"六法"逐步发展为中国画的核心理论,尤其"气韵生动"更是被奉为圭臬,自宋郭若虚在<图画见闻志>的<论气韵非师>篇中强调了"气韵"是人的先天性气质,是不可学的以后,把谢赫具有内在联系的"六法"机械地割裂为两个部分,让后学迷茫,黄宾虹以其毕生的实践和卓越的见识,发展了董其昌通过后天性修养的方式,也即"读万卷书,行万里路"获得"气韵"的观点,指出了"笔力"的强弱是决定"气韵生动"的关键.     

PWPM信号的功率谱研究

对脉冲宽度、位置联合调制(pulse width and position modulation)简称 PWPM 方式的随机信号序列功率谱进行了研究,文献[1]的理论结果显示 PWPM 随机信号序列功率谱中存在符号(symbol)同步信号离散谱成分,这有利于在接收端正确接收 PWPM 信号.用计算机模拟估计了 PWPM 随机信号序列的功率谱.其结果也表明了 symbol 同步信号的存在.     

谓词性词语修饰动作动词的语序初探

谓词性词语修饰动词时的位置是有规律的在时间顺序相似性原则的制约下,表示后现情状的谓词性词语后置;在"参照物在目的物之前"原则的制约下,谓词性词语为"参照物"时前置,为"目的物"时后置.     

试论《红楼梦》的“时序”和“年龄”描写

《红楼梦》中的“时序”“年龄”描写 ,客观上确实存在着不统一现象。但这却不是作者的“失误”“疏忽”和作品的“纰漏” ,而是作者的有意为之。它是作者不为书中人物作“传记”、不为贾家作“年谱”的特殊创作方法。这种方法既使作品“历历生动” ,又是对我国优秀传统小说创作方法的继承和发展 ,同时 ,更是作者“象征现实主义”创作方法的成功运用。作者的这种写法是为其表现主题、刻画人物形象服务的     

Bundling and Scheduling Service Packages with Customer Behavior: Model and Heuristic

Past researchers have found evidence that customers consider the sequence of event utility when evaluating past and future service experiences. Specifically, the evidence confirms that the placement of a peak event, the utility of the last event, and the slope of event utility over time all affect customer behavior and perception. We formulate an optimization problem with a focus on optimizing schedule sequence characteristics in order to maximize customer experiences. We discuss possible contexts in which this type of scheduling might be considered and, as an example, present a particularly complex model of a world‐renowned performing arts venue. We solve the problem with a simulated annealing algorithm and further discuss the complexity and opportunities associated with this type of scheduling effort.     

基本养老保险收支测算中职工人数模型的探讨

职工人数测算在养老保险收支测算中居重要地位,通常使用的时间序列法,受波动性因素影响测算结果误差较大,在保障水平固定时误差直接表现为基期收支与实际不符。为了更准确地模拟职工年龄结构的变化,本文采用OLG方法,建立年龄变化相对稳定的职工人数递推模型。通过基期数据的对比检验,我们发现退休职工增速远大于正常的企业职工退休速度,参保职工人数测算口径偏小是造成这一现象的主要原因。