摘要：Harmful algal blooms(HABs) have led to extensive ecological and environmental issues and huge economic *** HAB control techniques have been developed,and biological methods have been paid more *** bacteria is a general designation for bacteria which inhibit algal growth in a direct or indirect manner,and kill or damage the algal cells.A metabolite which is strongly toxic to the dinoflagellate Alexandrium tamarense was produced by strain DH46 of the alga-lysing bacterium Alteromonas *** culture conditions were optimized using a single-factor test *** including carbon source,nitrogen source,temperature,initial pH value,rotational speed and salinity were *** results showed that the cultivation of the bacteria at 28℃ and 180 r min-1with initial pH 7 and 30 salt contcentration favored both the cell growth and the lysing effect of strain *** optimal medium composition for strain DH46 was determined by means of uniform design experimentation,and the most important components influencing the cell density were tryptone,yeast extract,soluble starch,NaNO3 and *** the following culture medium was used(tryptone 14.0g,yeast extract 1.63g,soluble starch 5.0 g,NaNO3 1.6 g,MgSO4 2.3 g in 1L),the largest bacterial dry weight(7.36 g L-1) was obtained,which was an enhancement of 107% compared to the initial medium;and the algal lysis rate was as high as 98.4% which increased nearly 10% after optimization.

摘要：A new method for constructing a fitting surface on a triangular grid is presented. Assuming images are obtained by sampling from the original scene. Conventional polynomial interpolation methods generally construct the fitting surface on a square grid. Different from existing methods, the new method constructs the fitting surface on a triangular grid which can divide the original surface more detailed and improve approximation accuracy. As the quality of the image edges plays a key role in visual effects of image, the new method uses image edges as constraints to get a triangle grid. The new method constructs a cubic polynomial patch locally using image data to approximate the original surface. Experimental comparison results of the new method with other methods show that the new method can produce high-quality images and remove the zigzagging artifact.

摘要：鉴于互感器测量精度存在温漂的问题,研制了基于BGO晶体Pockels电光效应和电容分压器的自愈式光学电压互感器。该互感器采用基准源自动校准的设计方案,解决了光学电压互感器测量精度随温度漂移的问题。根据电容分压器和Pockels电光效应传感器的数学模型,阐明了传感参数实时校正原理,给出了互感器的结构设计,并根据IEC 60044-7电子式电压互感器标准对研制的光学电压互感器进行了相关试验。试验结果表明,当施加80%、100%和120%额定电压时,比差≤0.2%,角差≤±2′;当施加2%和5%额定电压时,比差≤0.3%,角差≤10′;当施加150%额定电压时,比差≤0.2%,角差≤1′。研制的互感器满足0.2级测量用要求并高于3P级保护用要求。循环温度试验中,在整个温度范围内,电压互感器比差≤0.2%,角差≤3′。机械性能测试也获得通过。

摘要：从基于电容分压的电子式电压互感器(ECVT)的工作原理入手,介绍了该互感器的基本构成,着重分析了ECVT的暂态特性,并以单相220 kVECVT的基本特性为建模参数,利用OrCAD仿真其暂态特性并量化了二次分压电阻的阻值范围。仿真结果表明,通过合理选择二次分压电阻,可以修正ECVT的暂态特性,解决了ECVT暂态过程中出现的短路和重合闸问题。实验数据证实,所研制的220 kV ECVT阻值确定在10 MΩ等级暂态特性最佳,达到了测量0.5级和保护3P级准确度设计要求,满足IEC60044-7《电子式电压互感器》标准要求。

摘要：前陆盆地是世界上油气资源最丰富的盆地类型,而地处其活动翼的前陆冲断带已成为近年来勘探突破发现和增储上产的重要接替领域。中国前陆冲断带油气地震勘探技术发展经历了常规二维地震、宽线大组合二维地震、常规三维地震和宽方位高密度三维地震4个阶段。通过面向叠前深度偏移成像的地震采集优化设计技术、面向复杂构造区的地震资料处理技术和面向复杂构造区的地震资料解释技术3个方面阐述了中国前陆冲断带油气地震勘探关键技术,并以塔里木盆地库车坳陷、准噶尔盆地南缘为例介绍了主要勘探成效,其对推动前陆冲断带核心配套技术形成和应用具有重要意义。对于前陆冲断带勘探中所面临的复杂地表和地下地质条件(双复杂)、构造变形剧烈、地震资料品质差等挑战,依然需要在"人工智能+物探技术"、深层—超深层、岩性地层及非常规油气藏、地球物理综合服务与跨专业一体化协同工作等方向进行探索和发展。

摘要：针对液压支架压力传感器数据处理系统存在的传输距离短、可靠性低、供电电源续航时间短的问题,设计了一种基于LoRa与CAN通信的液压支架压力传感器系统。系统内嵌的CAN通信模块周期性采集液压支架压力传感器数据,由STM32微控制器计算、分析以及逻辑处理后经LoRa通信模块传输至井下液压支架压力监测分站。该系统实现了液压支架压力传感器数据的远距离、高可靠性、低功耗无线传输,避免了复杂布线、维护困难的问题。最后完成了压力传感器系统通信可靠性试验、压力监测数据试验以及能耗试验。试验结果表明:该压力传感器系统的有效可靠传输距离可达300 m,压力传感器监测数据误差小于1%,供电电源续航时间可达141 d,可满足液压支架控制系统要求。

摘要：针对带式输送机控制系统存在的节能效果不明显、煤流量检测精度不高等问题,研究了一种基于煤流量识别的带式输送机节能控制系统。试验结果表明,该节能控制系统煤流量检测误差可保持在5%以内,24 h能耗下降了30.19%,电费下降了43.23%,实现了带式输送机节能降耗、经济运行的目标。

摘要：为更好地认识暖温带森林植物特征及其演替规律 ,进行暖温带森林生态系统和生物多样性保护 ,对雾灵山自然保护区的蒙古栎林进行了研究。详细论述了其分布、生境、种类组成、外貌特征 (生活型谱、叶级、叶型、叶缘 )、结构特征 (层次、层片、综合数量特征 ) ,并对群落的演替动态进行了预测。

摘要：首先分析了在传统教学模式下,近代物理实验教学中存在的问题.翻转课堂教学模式为解决这些问题提供了有效途径.结合近代物理实验教学特点,构建了近代物理实验翻转课堂教学模式,并较详细地介绍了翻转课堂教学模式的教学设计实施策略,通过分析表明翻转课堂教学模式可以有效地解决课内外缺乏融合、缺乏个性化学习和讨论交流学习的弊病.提高了学生自主学习的积极性,提高课堂教学效果和质量.

摘要：智能变电站要求光学电流互感器(OCT)具有状态可监测功能,以实现OCT的状态检修。通过自顶向下的状态参数分解层次模型,获取OCT的关键运行状态参数。设计了OCT的运行状态监测系统,采用软件同步时分复用技术进行通讯,利用现有通讯协议中的备用位进行数据信息解析,在不改变现有智能变电站通讯体系的情况下实现对OCT运行状态的监视功能。提出的状态监测技术能够实时记录表征运行状态的采样值数据,不仅可以实现状态检修,而且可以利用记录的数据对OCT的健康状况和使用寿命进行评估,大大提高了智能变电站的运行可靠性。