小城镇环境规划编制研究

小城镇环境规划的编制在我国刚刚兴起,它是建设环境优美小城镇、促进我国城镇化战略和可持续发展战略实施的一项基础性工作。文章就小城镇环境规划基本概念、指导思想与原则、基本程序与理论方法、主要规划内容、指标体系与目标确定等进行了分析研究,并提出了小城镇环境规划编制需要关注的几个问题。     

Experimental investigation of nonlinearities of ship responses in head waves

The present study focuses on building a systematic approach to identify, from experimental results, the nonlinearity in the dynamic system of a high-speed ship. The experimental program consists of tests in both regular and irregular head waves, and the measured quantities included wave elevation, vertical motions, and hull pressures. By contrasting these results to the quasi-linear behaviors of heave motion, the nonlinear behaviors of pressure are highlighted and presented. Three nonlinear assessments, the probability density function, and the variance spectra are provided. Based on these investigations, we conclude that the pressures, particularly, at the ship’s bow contain more nonlinearities than just the heave motion. They are identified mainly by the large amplitude of the higher harmonics and also by the large asymmetry in the measured signals. Furthermore, the coherence spectrum obtained from the third-order orthogonal frequency-domain Volterra model provides information regarding the magnitude of each order at the corresponding frequency, which serves as a strategy to simplify a complex problem or to achieve a balance between regular and irregular waves. The overall results show that the higher-order components are significant for the pressure system and the outcome of the proposed model can offer constructive feedback, which can lead to more practical applications.     

峨眉山頂佛燈觀測報告

(一)槪述峨眉山位於我國西部,實當北偉二九度二八分,東經一○三度四一分,為四川西南面之高山,係川邊山脈之支脈。南、西、北、為大涼、大雪、邛崃三高山所圍:勢如城垣,高不可越。而峨眉山實居此三高山所圍半圓之中。山之東東北及東南而,為峨眉嘉定廣大之平原壩地,除接連壩地之面為懸岩絕壁外,其北及南各有坡道,可拾級而登。其最高峯拔海高度凡三千零七十公尺。吾人每登此山絕頂,辄於夜間攀臨山頂之岩沿,藉覩全山夜景,常見無数燈光,呈現眼     

锂离子电池正极材料中锰、钴含量测定

为准确、快速测定锂离子电池正极材料LiCoxMn2-xO4中锰、钴的含量,给出了一个快速、简便的测定方法。提出了用络合滴定法测定锰含量,返络合滴定法测定锰、钴总量,再利用差减法计算出钴含量。相关的进行了酸溶解选择试验、锰含量测定条件选择试验、总量测定指示剂选择试验。最后,对锂离子电池正极材料LiCo0 1Mnl 9O4中的锰、钴含量进行了测定,结果表明,具有较高的精密度和准确度。     

内蒙古达茂旗北瓦窑西别河组、查干哈布组及二者间的不整合

内蒙古达茂旗北瓦窑一带的西别河组和查干哈布组是1:20万区调建立的岩石地层单位,当时归于上志留统。1:25万区调中通过区域对比,将分布于巴特敖包一带的志留系、泥盆系进行了归并,不整合面之下的为上志留统西别河组,不整合面之上的为下泥盆统查干哈布组。该不整合的确立,标志着晚加里东运动在华北地块北部增生带有明显的响应,具有全球对比意义。