会计信息失真的表现形式形成原因及治理对策

会计信息是社会各方面的信息使用者了解企业财务状况、经营成果和现金流量，据以做出经济决策．并进行管理的有效工具。但是，近几年来“会计信息失真”已成为世界范围内非常严重的社会问题。其范围广、程度深、危害大，巳严重干扰了社会经济秩序。会计领域内的诚信缺失，一度成为人们议论的热点话题。由此可     

海洋走航式单边连续观测地震折射波Δt解释方法--1种新的浅层折射单支时距曲线解释方法

在浅层工程折射地震测量中 ,通常采用相遇观测系统采集数据和相应的解释方法进行解释 ;对于单边观测采集方法由于与其相应的解释方法较少而少被采用。本文提出 1种方法简单、精度可靠、可直接利用同一点相邻 2排列 2次观测的初至折射时间并适合于海洋走航式单边连续观测系统的折射初至资料解释方法。其精度基本与同观测段的采用相遇观测的差异时距方法解释的精度十分接近。该方法即适合于人工解释又适合于计算机自动解释。     

Formation Dynamics and Quantitative Prediction of Hydrocarbons of the Superpressure System in the Dongying Sag

Based on the theory of formation dynamics of oil/gas pools, the Dongying sag can be divided into three dynamic systems regarding the accumulation of oil and gas： the superpressure closed system, the semi-closed system and the normal pressure open system. Based on the analysis of genesis of superpressure in the superpressure closed system and the rule of hydrocarbon expulsion, it is found that hydrocarbon generation is related to superpressure, which is the main driving factor of hydrocarbon migration. Micro fractures formed by superpressure are the main channels for hydrocarbon migration. There are three dynamic patterns for hydrocarbon expulsion： free water drainage, hydrocarbon accumulation and drainage through micro fissures. In the superpressure closed system, the oil-driving-water process and oil/gas accumulation were completed in lithologic traps by way of such two dynamic patterns as episodic evolution of superpressure systems and episodic pressure release of faults. The oil-bearing capacity of lithologic traps is intimately related to reservoir-forming dynamic force. Quantitative evaluation of dynamic conditions for pool formation can effectively predict the oil-bearing capability of traps.     

结构振动控制的半主动磁流变质量驱动器(MR-AMD)

本文首先提出了一种新型的半主动磁流变质量驱动器（MR－AMD），该装置用磁流变驱动器替代AMD的液压驱动系统；其次采用所提出的半主动控制算法仿真分析了MR－AMD用于结构振动控制的有效性；第三，比较了半主动质量驱动器（MR－AMD）、调谐质量阻尼器（TMD）及主动质量驱动器（AMD）对同一模型结构的控制效果。分析结果表明，MR－AMD作为一种半主动质量驱动器有效地降低了结构的反应，其控制效果虽然不如具有相同质量块参数的AMD但却优于TMD，且同AMD一样具有较宽的有效频带范围。     

断裂构造的遥感研究方法综述

断裂构造是一种基本的构造型式。断裂构造遥感研究是高新探测技术与地球科学的有机结合 ,是断裂构造常规研究方法的有益补充和向纵深拓展的必然趋势。该文从总体思路、具体内容、操作方法等各个不同角度系统地论述了断裂构造遥感研究的现状和发展趋势 ,并在断裂构造信息提取、光谱特征分析、空间结构分析 (包括分形分析 )等方面提出了一些观点。     

GPS数据处理中IGS基准站的选取

IGS基准站的选取问题是目前GPS数据处理中讨论的热点问题。文中从基准站选取的几何意义、统计意义和物理意义3个方面分析讨论了IGS基准站的选取问题。并通过对理论及大量算例的分析，提出了IGS基准站选取的一般原则。     

大连地区阵风系数特征分析

利用2015年5月至2020年4月辽宁省大连地区9个国家气象站、2017年165个区域气象站逐10 min测风资料,从风向、风级、月际变化、日变化、空间分布和天气影响系统等对大连地区最大、平均、最小阵风系数进行统计分析。结果表明：1—12月平均阵风系数的变化范围为1.66～1.77,秋末冬初平均阵风系数偏大,春夏季节偏小;与冷空气相对应风向的平均阵风系数大于与暖空气相对应的风向;随着风级的增大,最大、最小阵风系数向平均阵风系数收敛;不同风级下阵风系数的频率分布均呈单峰型分布,风级越大,分布范围越窄。除西南风外,其他风向的阵风系数均表现出白天大、夜间小的特点。大连地区阵风系数具有明显的地域特点,东南和西北部沿海区域的阵风系数比内陆和西南沿海偏小,风向基本不影响阵风系数的空间分布。大连的大风过程多受海上气旋和高压前部双系统共同影响,气旋、台风以及雷暴大风的平均阵风系数大于同风级的平均值。     

沪蓉高速柴家湾隧道围岩稳定性分析及支护效果研究

隧道围岩的应力分布及变形特征对保证其长期稳定性具有关键的作用。本文以柴家湾隧道为例进行实态建模,通过采用有限元软件ANSYS对其施工全过程进行了三维弹塑性数值模拟计算。研究结果表明,隧道拱顶和拱脚处应力集中现象明显,局部可能出现拉应力;变形主要集中在拱顶、拱腰部位,衬砌单元所受内力在规定强度范围以内,支护措施合理有效。     

Expression of the Phycoerythrin Gene of Gracilaria lemaneiformis (Rhodophyta) in E. coli and Evaluation of the Bioactivity of Recombinant PE

Phycoerythrin (PE) is one of the most important proteins involved in light capturing during photosynthesis in red algae. Its potential biological activities had gained wide concerns. In the present study, tumor cytotoxic and hydroxyl radical assay were preformed to detect the bioactivity of recombinant PE. Recombinant plasmids pGEX-PE and pBGL were transformed into E.coli BL21 to make two recombinant strains BEX (pGEX-PE) and BGL (pBGL). PE expressing in BEX (pGEX-PE) was validated by SDS-PAGE and Western blotting analysis. SDS-PAGE analysis indicated that the PE-GST fusion protein was mostly inclusion bod- ies. Specific expression of PE was confirmed by Western blotting analysis. The recombinant E. coli BEX (pGEX-PE) cells were col- lected and sonicated. The supernatants were reserved for the tumor cytotoxic experiments. The result of tumor cytotoxic assay indi- cated that the supernatants containing PE had the activity of inhibiting the growth of Hela cells and with the increase of protein con- centration, the inhibiting rate increased from 37.31% to 63.26%, which showed significant difference from the control. Hydroxyl radical scavenging effect was tested with supernatants of BEX (pGEX-PE) and BGL (pBGL) cell lysates treated with sonication and heating. For the sonication samples, the scavenging rates of the supernatants of BEX (pGEX-PE) and BGL (pBGL) cell lysates were significantly higher than the negative control BL21(pGEX-4T) (P<0.02), and the scavenging rates increased slowly following the increase of the protein content. For the heating samples, except for the 0.2 mg mL-1 BGL (pBGL) products, the scavenging effects of the supernatants of BEX (pGEX-PE) and BGL (pBGL) cell lysates were stronger than that of negative control BL21(pGEX-4T). However, the effect intensity was not positively correlated with the increase of the protein concentration. Though a partially de- creased hydroxyl radical scavenging activity was led by heating, the biological activity was still retained and conspicuous. This re- search showed that phycoerythrin protein expressing in E. coli has the potential medical and sanitarian value.     

致密砂岩多期裂缝形成机制及定量表征研究进展

致密砂岩油气是重要的非常规资源,裂缝作为主要渗流通道,其本身分布规律的复杂性以及多期发育和多期充填的特征,直接影响着裂缝预测的精度,目前尚缺乏一套全面解决构造裂缝定量预测的系统方法。因此,需要深入探讨多期裂缝的识别、充填过程和形成—叠加演化机制,建立合理的裂缝表征模型,以定量预测裂缝参数分布范围。在大量文献调研的基础上,本文认为致密储层裂缝研究主要涉及三个关键方向:通过野外露头和岩心观察,分析裂缝发育特征,结合构造演化和流体包裹体分析,确定裂缝发育期次;通过热液充填模拟实验和岩石力学实验,揭示裂缝充填机制,及其在多期应力作用下裂缝的萌生、扩展和叠加过程;采用实验统计方法,基于能量守恒定理和最大应变能密度理论,建立考虑裂缝差异充填的各向异性强度破裂准则,建立裂缝参数的定量表征模型。最终,本文形成和完善了致密砂岩多期裂缝演化及量化表征的理论体系,为此类油气田的勘探开发提供重要科学依据。