污泥消化前的预处理效果比较

比较了活性污泥采用碱处理、碱处理与超声处理（20kHz,150w）不同组合预处理的效果。在溶解效果实验中,采用碱预处理,溶解性COD与TCOD的比值可增大到30.1％,再接超声处理,该比值可增大到79.3％;如同时采用碱和超声处理,该比值达到75.9％。在后续BAP实验中,初始活性污泥中挥发性脂肪酸与TCOD的比值小于10％,采用碱预处理,该比值可增大到30％,再接超声处理,该比值可增大到59％;如同时采用碱和超声处理,该比值达到最大值80％。此外,同时采用碱和超声处理可大大缩短预处理时间。因此,将碱和超声同时用于预处理,能有效增加活性污泥中挥发性脂肪酸的产量、改善后续的消化过程。     

大体积混凝土配合比优化设计及施工工艺研究

对甬江特大桥承台大体积混凝土配合比及施工工艺进行了研究,为克服大体积混凝土因水化热产生开裂,工程采用控制水泥用量、掺加粉煤灰和矿渣及高效减水剂、延长混凝土设计龄期等方法,运用密实骨架堆积理论对混凝土配合比进行优化设计,通过预埋冷却水管降温措施及严格的施工管理,有效减小混凝土温度差,减少混凝土温度裂缝的产生.     

Molecular Dynamic Simulation on the Absorbing Process of Isolating and Coating of α-olefin Drag Reducing Polymer

The absorbing process in isolating and coating process of α-olefin drag reducing polymer was studied by molecular dynamic simulation method, on basis of coating theory of α-olefin drag reducing polymer particles with polyurethane as coating material. The distributions of sodium laurate, sodium dodecyl sulfate, and sodium dodecyl benzene sulfonate on the surface of α-olefin drag reducing polymer particles were almost the same, but the bending degrees of them were obviously different. The bending degree of SLA molecules was greater than those of the other two surfactant molecules. Simulation results of absorbing and accu-mulating structure showed that, though hydrophobic properties of surfactant molecules were almost the same, water density around long chain sulfonate sodium was bigger than that around alkyl sulfate sodium. This property goes against useful absorbing and accumulating on the surface of α-olefin drag reducing polymer particles; simulation results of interactions of different surfactant and multiple hydroxyl compounds on surface of particles showed that, interactions of different surfactant and one kind of multiple hydroxyl compound were similar to those of one kind of surfactant and different multiple hydroxyl compounds. These two contrast types of interactions also exhibited the differences of absorbing distribution and closing degrees to surface of particles. The sequence of closing degrees was derived from sim-ulation; control step of addition polymerization interaction in coating process was absorbing mass transfer process, so the more closed to surface of particle the multiple hydroxyl com-pounds were, the easier interactions with isocyanate were. Simulation results represented the compatibility relationship between surfactant and multiple hydroxyl compounds. The isolating and coating processes of α-olefin drag reducing polymer were further understood on molecule and atom level through above simulation research, and based on the simulation, a referenced theoretical basis was provided for practical optimal selection and experimental preparation of α-olefin drag reducing polymer particles suspension isolation agent.     

低温热驱动两级吸收式制冷系统中间压力的研究

对溴化锂两级吸收式制冷系统中间压力Pm(即低压发生器压力）的取值进行了理论计算和分析,得出了中间压力的取值范围及计算公式,可供两级吸收式制冷系统设计时参考。     

基于多模型SGPC的高速列车速度及位置跟踪控制

研究了列车自动驾驶系统(ATO)的多模型阶梯式广义预测控制(SGPC)方法。首先针对高速列车运行过程的非线性特性,采用多模型策略,建立一个线性自适应模型和一个神经网络非线性模型并行辨识系统的动态特性。然后在每个采样时刻根据性能指标切换到最优的局部模型作为系统的当前模型。设计SGPC控制器,从而实现高精度的列车速度和位置跟踪控制。最后模拟列车运行中参数突变的影响,将该方法与传统的单模型线性广义预测控制方法进行对比研究。仿真结果表明:其控制效果明显优于单模型的线性广义预测控制器。     

佐剂性关节炎的佐剂剂量条件探索

目的 建立实验室条件下佐剂性关节炎模型的最佳剂量条件。方法 取佐剂卡介苗在相应条件下制成Freund's佐剂,按不同剂量给Wista大白鼠进行足跖内皮注射,观察记录24d。结果及结论 0．1mL Freund's佐剂组在实验室条件下,关节炎模型反应较典型。     

氟哌啶醇与阈下剂量吗啡合用对小鼠成瘾性的研究

目的：观察氟哌啶醇与阈下剂量吗啡合用对小鼠成瘾性的影响。方法：自然戒断试验。结果：吗啡与氟哌啶醇配伍组元一发生竖尾和自发惊厥。结论：吗啡与氟哌啶醇合用,在产生明显协同镇痛作用的同时,致成瘾性却比等效剂量吗啡低得多。     

交叉平面电阻抗成像模型分析

该研究针对传统平面电极阵列电阻抗成像系统问题,构建了一个交叉平面电极阵列的电阻抗断层成像系统。此系统由65个电极组成4个水平和8个轴向相交叉的成像空间。仿真及水槽实验采用了Tikhonov正则化算法,重建结果与原物体的比较表明,该成像方式在空间中能够提供更高的分辨率和定位精度。此外,这种方法能有效地减少计算量,在临床检查和监护上显示出很大的应用前景。     

表皮生长因子间接竞争酶联免疫吸附测定法的建立

目的：建立一种可应用于临床的快速定量测定表皮生长因子含量的酶联免疫吸附测定法(ELISA)。方法：以重组人表皮生长因子(ECF)为包被抗原和竞争抗原，两与一定量的ECF。抗血清反应，建立检测EGF的间接竞争ELISA方法。结果：理想的包被抗原质量浓度为1μg/mL，ECF抗血清的工作浓度为1：10000，酶标二抗工作浓度为1：3000，可测最适范围为0．5～16ng／mL，最小检测量为0．5ng/mL，批内和批间变异系数分别为6．21％和7．42％。得到回归方程y=-13．65ln(x) 81．554，相关系数R^2=0．997。结论：建立了快速定量检测ECF的间接竞争ELISA方法。     

基于被动太赫兹波图像的图像分割技术

研究被动太赫兹波图像的图像分割算法. 针对被动太赫兹波图像水平和竖直方向平滑程度不同的特点,提出了一种改进的高斯-拉普拉斯算子,不同于传统高斯-拉普拉斯算子各向同性的特点,改进的算子在水平和垂直方向上对边缘具有不同的检测尺度. 实验表明,利用该算子可以将被动太赫兹波图像中的人和隐匿物品自动分割,能够准确、快速地对可疑的隐匿物品进行定位,使被动太赫兹波成像技术满足实际应用的需求.