ENCLOSURE EXPERIMENTS ON AND LACUSTRINE PRACTICE FOR ELIMINATING MICROCYSTIS BLOOM

Microcystis bloom, one of the most objectionable characteristics of eutrophication in tropical and subtropical waters, occurred in Donghu Lake (East lake) of Wuhan every summer from the 1970s up to 1984, but from 1985 up to now failed to occur there. The cause of its disappearance rema-ined in obscurity until recently. In situ enclosure experiments in the lake for three years showed that the stocking of the filter-feeding silver carp ( Hypophthalmichthys molitrix ) and big-head carp (Aristichthys nobilis ) played a decisive role in eliminating Microcystis bloom from the lake; but that recurrence of the bloom is possible under certain conditions. This paper presents the details and the results of enclosure ex-periments. The authors‘ analysis of fish biomass data obtained by echo-sounding and the fishery produc-tion of the lake over the years, revealed that the recurrence of Microcystis bloom can be prevented so long as the combined biomnss of silver carp and big-head carp remains at or exceeds 50 g per cubic meter of lakewater, as was the case in the lake‘s 1985 fish yield of 1015 t.     

A NEW SPECIES OF THE GENUS NEROCILA （ISOPODA： CYMOTHOIDAE） FROM THE EAST CHINA SEA

A new species of cymothoid Isopeda, Nerocila donghaiensis, collected from the body of a sciaenid fish, Johnius sp., is described in the present paper. The new species can be distinguished from the other species of genus Nerocila by its endoped of uropods with deep notch, sharply serrated on the lateral margin and strongly serrated on the medial margin; antennule with 1 st article swollen; dactyli of pereopods Ⅰ, Ⅱ, Ⅳ, Ⅴ swollen.     

胶北地区内生金矿成矿规律

胶北内生金矿是壳幔混源岩浆期后热液成矿 ,受复合基底EW向构造的早新华夏系和郭家岭超单元控制 ,蚀变、矿化分阶段连续进行 ,分为焦家式、灵山式、玲珑式及上庄式四个亚类型。金矿床区域上东西成行、南北成列、汇集成片呈棋盘格局 ;矿带内矿床沿走向等距分布、沿横向对应出现 ,矿床类型横向具分带、走向有变化、倾向相对稳定。矿体在控矿构造引张扩容段和构造叠加段赋存 ,并具斜立、侧伏、尖灭再现、斜列、瓦叠等产出规律。     

山东省区域地球物理场

山东省各岩石磁性及密度参数基本可分为高、中、低 3类。山东省磁性结晶基底为泰山岩群、荆山群、胶东岩群、胶南岩群。以沂沭断裂带为界 ,山东省区域地球物理场分为鲁东区和鲁西区。鲁东区进一步划分为 3个次级区 ,即北部区、中部区和南部区。鲁西区进一步划分为 5个次级区 ,即鲁北重磁缓变区、鲁西南重高磁高区、中部弧形重磁场区、鲁西中部重低磁高区、鲁中南条带状重磁场区。各区地球物理场由于地质原因各具特点。山东省莫氏面总体呈东浅西深的缓变带 ,在该缓变带的背景上 ,呈周边地区条带状幔隆、中部幔坳的特征。山东省居里面呈近南北向带状分布 ,有德州聊城菏泽隆起带、滨州淄博滕州深坳带、蓬莱海阳千里岩响水隆起带。鲁中隆起北部碰撞带为山东省特殊的构造地带 ,其特征为侵入岩体沿该带断续出现、岩体围岩或岩体内铜及多金属矿化较为普遍、地热田沿该带时有分布、地形上为南部山区和北部平原的分界地带。胶莱盆地内 ,蓼兰—高密缺失莱阳群层位 ;中生代早期 ,盆地东北部与西南部是盆地的沉积中心 ,至晚期盆地中心北移 ,第三纪沉积中心则为平度蓼兰附近 ;盆地较深部位位于诸城凹陷、平度凹陷。胶莱盆地的次级构造单元可划分为 11个 ,七级镇构造带控制了胶莱盆地的成生和发展。山东省岩浆岩通常表     

Comprehensive tests on rising height of capillary water for coarse grained soil

According to the comprehensive tests on the rising height of capillary water for seven kinds of different coarse grained soil by use of the method of standpipe,the relationship between the rising height of capillary water and time was obtained,and the influencing factors and rules were analyzed.The data of the steady rising height of capillary water were obtained,and the regression equation of coarse grained soil on steady height and physical indexes(effective grain d 10 and porosity n) was found.Compared with Hazen’s and other expressions that could estimate the steady height of capillary water of coarse grained soil,the proposed method is satisfactory and the defects of the latter were pointed out.     

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客观新闻写作的原则

有许多原则严格限制西方报章记者的表达自由。这些原则禁止记者在报道新闻时加上自己的评论、判断、解释或推论，以确保新闻的客观性、可靠性的公正性。客观的新闻工作者懂得新闻的概念，遵循严格的中立原则，避免经济、宗教、政治或民族偏见。尽管如此，报章的编辑、经营者和老板却能左右新闻。他们可以决定是否发表，发表多少以及在哪儿发表某条新闻，这一情形及其他因素对新闻的客观性构成威胁。     

论多种数据联合反演的模式及算法

针对日益丰富的数据资料，综述了大地测量反演的发展进程，论述了多种数据联合反演的意义和必要性，给出了兼顾权比确定的大地测量、地震和地质三类数据的联合反演模式及采用水准测量、GPS和重力三种数据联合反演断层参数的具体公式，特别介绍了求解优化问题所有全局最优解的区间算法，并给出了基本算例，结果体现了区间算法无可比拟的优越性及其在大地测量反演领域中的应用前景。     

对广东省高校教师工资统发工作的思考

分析了广东省高校教师工资统发过程中存在统发工资与地方保险局扣缴的养老金无法达到一致、统发工资与地方税务局扣缴的个人所得税的起征标准不一致、后勤改革与工资统发尚不配套、人事分配制度改革与统发工资尚不配套等问题 ,提出了解决问题的建议与对策     

花岗岩残积土桩基施工中的问题及解决办法

文章总结了梧州市常用的沉管灌注桩、钻孔灌注桩和人工挖孔桩在以花岗岩残积土为桩基持力层时施工中的特点及容易出现的问题 ,并提出相应的解决办法