15厘米太阳射电望远镜增益运算放大器的制作与调试

本文介绍了１５厘米太阳射电望远镜增益运算放大器的结构原理，调试检测及测试结果。     

石窟的地学基础及其分类

石窟是一种佛教建筑，以往均从宗教、文化和艺术等方面加以研究，但开凿石窟离不开一定的地质地貌，尤其是岩石条件，因此，石窟与地学，特别是岩石有着密切的关系。着重岩石与石窟的关系探讨石窟的地学基础及其分类，从地学的角度探讨有关石窟的保护问题。     

测井评价稠油层等级的新方法

从测井信息中提取油和水的重量百分比,最能反映稠油层质量的特征.用油和水的重量百分比评价稠油层等级,是一种新概念.测井评价稠油层等级的新方法,就是根据这一新概念建立的.本文论述了新方法的物理基础,建立了测井评价稠油层等级的数学公式,并且给出了评价法则和应用范例.     

对全国复测水准网平差的几点探讨

本文讨论复试水准网平差中的几个实际问题,即平差方法的选择,定权的必要精度和验后估计的必要多余观测数等。通过理论分析与实际试算得出了一些有益的结论。     

Global parameter estimation of the Cochlodinium polykrikoides model using bioassay data

Cochlodinium polykrikoides is a notoriously harmful algal species that inflicts severe damage on the aquacultures of the coastal seas of Korea and Japan. Information on their expected movement tracks and boundaries of influence is very useful and important for the effective establishment of a reduction plan. In general, the information is supported by a red-tide(a.k.a algal bloom) model. The performance of the model is highly dependent on the accuracy of parameters, which are the coefficients of functions approximating the biological growth and loss patterns of the C. polykrikoides. These parameters have been estimated using the bioassay data composed of growth-limiting factor and net growth rate value pairs. In the case of the C. polykrikoides, the parameters are different from each other in accordance with the used data because the bioassay data are sufficient compared to the other algal species. The parameters estimated by one specific dataset can be viewed as locally-optimized because they are adjusted only by that dataset. In cases where the other one data set is used, the estimation error might be considerable. In this study, the parameters are estimated by all available data sets without the use of only one specific data set and thus can be considered globally optimized. The cost function for the optimization is defined as the integrated mean squared estimation error, i.e., the difference between the values of the experimental and estimated rates. Based on quantitative error analysis, the root-mean squared errors of the global parameters show smaller values, approximately 25%–50%, than the values of the local parameters. In addition, bias is removed completely in the case of the globally estimated parameters. The parameter sets can be used as the reference default values of a red-tide model because they are optimal and representative. However, additional tuning of the parameters using the in-situ monitoring data is highly required.As opposed to the bioassay data, it is necessary because the bioassay data have limitations in terms of the in-situ coastal conditions.     

A WOE method for urban growth boundary delineation and its applications to land use planning

The aim of this study is to develop a new approach for delineating urban growth boundaries (UGBs) by applying the weight of evidence (WOE) method to land suitability assessments. Rapid urbanization is causing urban areas to encroach on agricultural land in China, posing a threat to national food security. Land use planning with clear delineation of UGBs is an effective method for controlling urban expansion. However, existing methods for delineating UGBs are typically complex or involve arbitrary decision-making. To address these drawbacks, we introduced the WOE method to develop a new UGB delineation approach, and applied this approach to a case study in the city of Jinan, China. This application achieved satisfactory accuracy; therefore, we concluded that the WOE method was an objective and effective approach to land use suitability assessments and UGB delineation. Land use planning could be benefitted considerably from the application of this method to land allocation and other planning decisions.     

淋溶在红树植物秋茄落叶分解失重中的潜在作用

于１９８６年冬－１９８９年秋在福建省九龙江口，连续３年分季节进行红树植物秋茄落叶在林地滩面的分解实验，并在室内测定其落叶和腐叶的可溶性物质含量，定量探讨淋溶在落叶分解失重中的潜在作用。结果表明，可溶性物质平均占落叶干重的２７．２６％，这些可溶性物质中的８７％在分解初期的快速淋溶阶段迅速损失，可导致落叶初始干重损失２４％。快速淋溶阶段持续时间平均分别是，春季３６ｄ，夏季，１３ｄ，秋季，１７ｄ，冬季５     

青岛雾水中SO2的研究

大气的严重污染导致雾中溶入ＳＯ2。等物质而形成酸雾（ＡｃｉｄＦｏｇ）。酸雾的研究较少［１～６，８，１０］。美国加州南部酸雾ｐＨ＜３．０，最低１．６３，我国仅对贵州的梵净山及四川的峨眉山等地的酸雾进行过研究，其成分多为常量组分［４～６，１０］。ＳＯ２是大气中重要的污染物，而酸雾中ＳＯ２的研究至今未见报道。因此研究雾水中ＳＯ２及其他成分具有重要的意义。青岛的６～７月为多雾月份，此时盛行风ＳＳＥ１，雾多形成于４～８ｍ／ｓ风速时，雾以上午４～８时频率最大，最小频率出现于午后１４～１６时，青岛海雾最长持续…     

AltiKa Radiometer: Instrument Description and In–Flight Performance

On 25 February 2013, the Satellite for Argos and AltiKa (SARAL) was launched from the Indian Sriharikota launch site. The AltiKa payload consisted of an altimeter and a radiometer. This paper describes the AltiKa radiometer. This instrument has been studied for several years by CNES, TAS-F, ASTRIUM-F and a set of science laboratories, and AltiKa is the first compact instrument embedding simultaneously the altimeter and radiometer functions. AltiKa radiometer is a dual frequency instrument working in K (23.8 GHz) and Ka band (37 GHz), it is based on the total power principle, with direct detection receivers. On-ground acceptance tests exhibited a very high level of performance: less than 0.2 dB has been estimated for both sensitivity and absolute accuracy in both frequencies. This paper focuses on the in-flight performances that have been observed since the launch. All the instrument observable characterizations are nominal, and in-flight sensitivity has been estimated lower than 0.2 K.     

射电日像仪灵敏度测量

灵敏度是射电望远镜的一个重要性能指标,它反映了望远镜监测弱信号的能力。基于明安图射电频谱日像仪(Mingantu Ultrawide Spectral Radioheliograph,MUSER)的调试观测,给出了日像仪灵敏度的测量方法,对天线系统以及整个阵列的灵敏度进行测量分析,得到了日像仪系统整体的灵敏度性能参数。测量同时给出了天线系统的效率以及接收机系统的增益,这将为下一步日像仪展开常规的科学观测提供参考。