养殖水环境中氮的循环与平衡

养殖水环境中，由于人为的介入和影响。使得水体中氮的各种形态转化和循环过程中发生了改变。笔者详细地介绍了养殖水环境中氮的各种存在形态，及其相互之间的转化和循环过程，同时总结了前人研究和提出的各种养殖水环境中氮的物质平衡模型，为优化水产养殖和保护水环境提供科学依据。     

洛克沙胂在鲫鱼体内的残留及消除动力学研究

本文对洛克沙胂在鲫鱼体内的砷残留及消除动力学进行了研究，鲫鱼在室内水池洛克沙胂溶液10mg／L(以As计)中连续暴露15天进行富集残留试验后转入清水中进行消除试验。采用微波消解处理和氢化物一原子荧光光度法测定鱼鳃、肌肉、血清和内脏中总砷含量。结果表明，砷在鱼体内的表现为吸收和分布较快，肌肉和血清中总砷水平仅为0．3～0．4mg／kg，内脏中残留最高达30．25mg／kg。洛克沙胂在鲫鱼组织中消除符合一级速率动力学过程，消除半衰期(t1／2)为2．5～2．8h，鱼鳃中砷浓度在初始2h内下降快，此后消除较慢，t1／2为9．45h。     

玉米杂交制种的纯度控制

纯度是玉米杂交种主要的质量指标之一。玉米杂交制种的纯度控制主要包括下列环节:亲本繁殖的质量控制和纯度鉴定;精准决定杂交制种的隔离方案,保证空间隔离距离不低于1000m,时间隔离播种时差不小于40d;在苗期、抽雄吐丝期和收获期根据相应的农艺性状差异,拔除杂株、弱株,剔除杂穗、弱穗;在雄穗开始抽穗前1周安排去雄,每天至少去雄1次;去雄后期要拔除所有迟发株、分蘖苗;父本授粉结束,及时清理全部父本植株,并将其搬运至远离制种田的地方封闭处理;杂交种子在脱粒、翻晒和入库过程中,必须有专人管理和登记,以免和其他材料混杂;发货时必须仔细核对品种名称和发货数量。     

Reliability Analysis of Ultimate Bearing Capacity of Concrete Filled Tube High Piers

To deal with the contradiction between accuracy and time consuming, a model of reliability analysis of CFT was proposed based on the response surface and nonlinear finite element method, And Initial geometric imperfection was induced by consistent mode imperfection method.The reliability index and sensitivity coefficients of CFT high piers were invested by the proposed model.The effects of slenderness, eccentricity and diameter thickness ratio on reliability index of concrete filled tube high piers were studied by parameter analysis method.Meanwhile, the influence of geometric nonlinearity was also analyzed and the reliability of CFT high pier could be affected by factors mentioned above.Based on the analysis, several suggestions for improving the reliability of CFT high piers were proposed.     

Emission characteristics on nature gas engine by additional injection of hydrogen peroxide into the premix chamber

In order to improve combustion efficiency of natural gas(NG) and reduce pollution emission in nature gas engine, additional injection of hydrogen peroxide (H2O2) into the premix chamber is proposed. With the test of CO, HC and NOx concentration, exhaust temperature, NG consumption etc., it is found that the emission of HC、CO and NOx decreased and the dynamic and economic performance of CNG engine is improved. H2O2 can make reduction of the combustion temperature while increase of the oxygen concentration. The pivot factors affecting NOx emission are temperature and oxygen concentration. The optimum mass proportion of nature gas and H2O2 is between 4.5 and 5.8 for NG consumption and pollution emission.     

新疆第二代棉铃虫的为害和防治指标研究

采用人为调整虫量梯度的方法，研究了新疆第二代棉铃虫在自然情况下对棉花的为害和防治指标。结果发现，蕾铃减少率（Ｙ１）与百株虫口密度（ｘ）间的关系为Ｙ１＝－３３．９４４４＋１４．９６６３ｌｎｘ；皮棉减产率（Ｙ２）与百株虫口密度（ｘ）间的关系为Ｙ２＝－８９．７１２１＋２４．４３４２ｌｎｘ；棉花受害后自我调节补偿能力有限。从经济学和生态学角度出发，提出了不同益害比下的防治指标     

高浓度甲醇废水的两段厌氧消化

采用两段厌氧消化工艺对高浓度甲醇废水进行处理可提高系统的处理效果 ,增强系统运行稳定性和抗冲击负荷能力 ,减少甲醇直接生成乙酸所造成的系统酸化的危险。生产性试验表明 ,一体化两段厌氧反应器正常运行时 ,其容积负荷高达 2 1.3kgCOD·m-3 d-1以上 ,去除COD的产气率达到 0 .4 5m3 ·kgCOD-1以上。在进水负荷剧烈波动的情况下 ,COD去除率维持在 95 %左右 ,出水COD一般在 2 0 0～ 5 0 0mg·L-1之间。     

Damage Model of Rock and the Damage Energy Index of Rockburst

Based on research of brittle rock mechanical experiment, damage model was established by damage mechanics theory. Furthermore, interior energy transformation of rock is analyzed from the point of view of damage mechanics. By analyzing the energy transformation of rock burst, the new conception of damage energy index of rock burst is put forward. The condition of rock burst is also established.     

Experimental study on the mechanical behavior of eccentrically loaded steel tubular columns filled with structural steel and concrete

Considered strength classes of concrete, ratio of structural steel to concrete, ratio of steel tube to concrete and eccentricity ratio of load, 6 test specimens of steel tubular columns filled with structural and concrete are designed. The damage phenomena of specimens are described in detail and the failure mechanism is analyzed. The results show the initial failure of the specimens are began from the yield of steel tube, the ultimate failure are ended from the buckling of steel tube caused by the expansion of core concrete. Due to the existence of structural steel, the ductility of specimens is superior to steel tubular columns. Before the yield of steel tube, the plane cross-section assumption of specimens can be put into use. The ultimate bearing capacity of specimens is increased with the increase of strength classes of concrete, ratio of structural steel to concrete and ratio of steel tube to concrete. But the ultimate bearing capacity and ductility are decreased with the increase of eccentricity ratio.     

Engineering Memoir and Features Analysis of Dynamics Phenomena in Yanshitai Mine

The depth of coal mining in Yanshitai mine is over 600 m,dynamics phenomena have been occurred of ter during mining ahd excavating.On the basis of research in Yanshitai mine,this paper recorded the geology and mechanics model of typical dynamics phenomena based on the mining and geology conditions,which have been applied for the mechanism of dynamics phenomena and studied with catastrophe.Meanwhile,the features and influence factor have been studied,and they can be references for mine hazards.