使用用户宏编制深孔加工程序

用数控钻铣床加工深孔时,会遇到排屑、冷却和润滑等困难问题.使用用户宏编制深孔加工程序可以解决此类问题.     

The game Grundy number of graphs

Given a graph G=(V,E), two players, Alice and Bob, alternate their turns in choosing uncoloured vertices to be coloured. Whenever an uncoloured vertex is chosen, it is coloured by the least positive integer not used by any of its coloured neighbours. Alice’s goal is to minimise the total number of colours used in the game, and Bob’s goal is to maximise it. The game Grundy number of G is the number of colours used in the game when both players use optimal strategies. It is proved in this paper that the maximum game Grundy number of forests is 3, and the game Grundy number of any partial 2-tree is at most 7.     

可编程逻辑阵列实现路口管理

介绍用两片GAL16V8芯片实现的十字路口交通管理器。一片GAL做成基于“最大长度移位寄存器型计数器”的可变模计数器，一片GAL做成控制器产生状态变量及红绿灯信号。电路简单，运行可靠。     

曾国藩与近代军阀制度研究现状述评

曾国藩与近代军阀制度的关系是一个很有价值的命题,是研究近代中国政治、军事、文化、历史变革的重要学术枢纽。已有的研究主要从曾国藩创建湘军在源流上的特点、湘军幕府在组织上的特点、湘军对近代化的影响三个方面进行了逻辑与历史的勾勒。相对于曾国藩建军、治军与战略战术这几个传统的研究板块来说,该主题的研究是曾国藩军事思想研究新的"增长点",成为了解读近代中国军事制度变革的历程与基本规律的重要历史命题。但在研究的视角、深度与立意上尚存在不足之处。     

单片机在柴油机工况检测中的应用

介绍了由单片微机构成的柴油机工况测试系统，该系统可测量柴油的油温、油压、冷却水温度及发动机转速等运行参数，并可综合分析运行状况，实现越界报警和飞车控制。详细讨论了测量原理与方法，给出了系统结构及测量电路。     

SOME SECOND ORDER ASYMPTOTICS IN EXPONENTIAL FAMILY NON-LINEAR REGRESSION MODELS (A GEOMETRIC APPROACH)

The differential geometric framework of Amari (1982a, 1985) is applied to the study of some second order asymptotics related to the curvatures for exponential family nonlinear regression models, in which the observations are independent but not necessarily identically distributed. This paper presents a set of reasonable regularity conditions which are needed to study asymptotics from a geometric point of view in regression models. A new stochastic expansion of a first order efficient estimator is derived and used to study several asymptotic problems related to Fisher information in terms of curvatures. The bias and the covariance of the first order efficient estimator are also calculated according to the expansion.     

超塑成形技术在注塑模制造上的应用

利用金属的超塑性成形技术制造用一般常规加工方法难以加工的复杂盲孔型腔，具有工艺简单、制模周期短、成本低，轮廓清晰、表面光洁等优点。     

史学研究学风和治史方法论

我国著名史学家、中国社会科学院荣誉学部委员朱大渭先生为本刊撰文,以深切体验评析当代史学研究学风,兼及治史方法,鞭辟入里,发人深思,对学界特别是广大青年学子当是难得诤言。     

论渔业经济增长方式从线性到循环的转变

本文从循环经济的角度,对我国渔业经济增长方式转型问题进行了探讨。我国传统渔业经济增长方式是具有高投入、高消耗、高污染排放特征的线性化的粗放增长方式;我国传统渔业难以从线性经济向循环经济转变的因素主要有认知因素、技术因素、制度因素、结构因素等几方面;要发展渔业循环经济,必须遵循政府掌舵、社会划桨的原则,切实贯彻循环经济“三R”原则,接合发生断裂的价值链,改革科技体制管理和投融资体制,完善行政考核体系,优化产业结构。