一种简单方便的防拷贝程度设计方法：识别计算机的C语言程序…

本主要讨论一种特殊的Ｃ语言程序设计方法，这种程序能有效地对自身的关键模块加密，能运行是地完成动态解密。     

上一轮实施的基本评估和对新一轮的建议 龙泉市土地利用总体规划

土地利用总体规划是在一定区域内,根据国家社会经济可持续发展的要求和当地自然、经济、社会条件,对土地的开发、利用、治理、保护在空间上、时间上所作的总体安排和布局,是国家实行土地用途管制的基础。县、乡级土地利用总体规划属实施性规划,其主要任务是按照上级土地利用总体规划的指标和布局要求,划分土地利用区,明确各土地利用区的土地主要用途和区内土地使用条件,为单位和个人合理使用土地,进行土地开发、整理提供依据,为政府审批农     

利用射电源位置残差解算章动系数的改正

章动序列的不准确引起春分点和黄赤交角的变化，直接影响到射电源的赤经、赤纬。利用IRIS网五天一组的VLBI观测资料，我们解算了定组观测的13颗射电源的赤经、赤纬，从射电源的位置残差解算出黄经章动和交角章动的改正，并估算了章动周年项（365.3天）和半年项（182.6天）的系数改正及自由核章动的振幅。     

Effect of Counter-Gradient in the Computation of Turbulent Fluxes of Heat and Moisture in a Regional Model

The counter-gradient terms in the computations of turbulent fluxes of heat and moisture have been included in the PBL parameterization of a regional model for monsoon prediction. Results show that inclusion of counter-gradient terms has a marginal impact in the prediction of large scale monsoon circulation and rainfall rates.     

Identification of the interstellar cyanomethyl radical (CH2CN) in the molecular clouds TMC-1 and Sagittarius B2

We report the astronomical identification of the cyanomethyl radical, CH2CN, the heaviest nonlinear molecular radical to be identified in interstellar clouds. The complex fine and hyperfine structures of the lowest rotational transitions at about 20.12 and 40.24 GHz are resolved in TMC-1, where the abundance appears to be about 5 x 10(-9) relative to that of H2. This is significantly greater than the observed abundance of CH3CN (methyl cyanide) in TMC-1. In Sgr B2 the hyperfine structure is blended in the higher frequency transitions at 40, 80, and 100 GHz, although the spin-rotation doubling is clearly evident. Preliminary searches in other sources indicate that the distribution of CH2CN is similar to that for such carbon chain species as HC3N or C4H.     

南极威尔克斯地SGR钻孔处雪冰转化过程中的密度变化特征

本文着重描述了SGR钻孔处冰盖上的积雪在密实化过程中的特征变化,并对该过程进行了分段的和全面的回归分析.结果表明,冰盖密度随深度增大,但增长幅度随深度减小.作者提出密度变化减小度的概念.计算得出的所研究冰芯钻取点的密度变化减小度为-0.15kg/m~3·m~2,粒雪成冰前的密实速率平均值为4.08kg/m~3·a.本文得到的冰盖密度变化“临界点”与以往报道的有所不同.分析这一现象时,作者强调当积雪还在活动层时冰盖温度的影响,并以此解释密度剖面的异常变化以及离差的回升.特别指出,积雪的密度变化具有气候学意义,它在一定程度上能够反映出积雪形成及变化过程中气候变化的某些信息.本文由密度变化确定的钻孔点雪冰转化深度为50米.     

The development process and urbanisation in a newly organised state: a case study of Haryana

"This paper examines the impact of emergence of Haryana [India] as a new state in 1966 on its development and concomitant urbanisation process. The analysis is based on data for individual towns for all the post-Independence censuses of 1951 to 1981. It was found that urban growth in the state was far more rapid during the post-1966 period than that during the pre-1966 phase. The spatial picture of urban growth also changed somewhat."