吸附饱和苯酚的活性炭电化学再生的研究

采用阳极扩展电化学氧化技术对吸附饱和苯酚的活性炭进行了电化学再生.实验表明:在石墨作为极板材料,投加氯盐的前提下,Cl-放电产生的Cl2溶于水生成的具有强氧化能力的物质HClO,将吸附在活性炭孔道表面的高浓度苯酚氧化是活性炭得以再生的根本原因.投加盐的种类、盐量、电流强度、电解时间和pH是影响再生效果的重要因素.     

白细胞介素-2对小鼠神经病理性痛的镇痛作用

目的探讨白细胞介素-2(IL-2)对神经病理性痛的镇痛作用及其可能的机制,为临床治疗神经病理性痛筛选新的镇痛药物奠定基础。方法通过结扎雄性C57BL/6小鼠单侧L5/L6脊神经建立神经病理性痛模型,然后利用机械刺激和冷刺激诱发的痛觉超敏实验分别观察腹腔注射不同剂量(1.0×106、2.5×106、5.0×106u/kg)IL-2对疼痛模型小鼠患侧脚掌痛阈的影响;同时,通过5.0×106u/kg IL-2注射前30 min腹腔注射纳洛酮(1 mg/kg)以观察阿片受体拮抗剂对IL-2镇痛作用的影响。结果腹腔注射IL-2可产生剂量依赖性镇痛作用,其中5.0×106u/kg和2.5×106u/kg IL-2均可显著提高模型小鼠患侧脚掌的50%缩足阈值(P<0.01)和降低5 min抬足次数(P<0.05),镇痛效应分别维持30 min和15 min,而1.0×106u/kg IL-2无明显的镇痛作用。IL-2产生的镇痛效应不能被纳洛酮阻断。结论IL-2对小鼠神经病理性痛具有镇痛作用,其镇痛效应除受阿片受体介导外还可能有其他分子参与。     

浮船坞实时数据监控系统的设计

“浮船坞实时监控系统”由一台研华(pentiumⅢ)工控PC作为上位机，两台OMRON C2000H PLC作为下位机。采用PCL—8312数据采集卡作为数据采集设备，测量元件是选用瑞士Keller公司生产的MPM416W和MPM420W型液位变送器。监控系统具有四角吃水、纵倾、横倾、挠度、及各压载水舱液位的测量、控制和记录等功能。实时数据采集与处理是系统中的关键技术，运用多线程技术手段提高了系统的运行速度。     

面向数控加工的船模曲面三维造型方法

为了最大限度地利用船模曲面的三族型线,使造型结果蕴涵更多的船模曲面的设计信息,分析了各类曲面造型方法构建船模曲面的不同效果,提出了面向数控加工的船模曲面三维造型的过曲线网格法,以一艘实际双艉船模曲面为例,研究了过曲线网格法实现船模曲面三维造型的关键技术:局部区域包容方案与分片造型方案,利用UG/OpenGrip开发了船模曲面三维造型模块。对于双艉船模曲面的制造,采用传统的手工放样的制作方法至少需要30 d,而采用四坐标船模曲面数控加工系统只需6 h就可以完成船模曲面98%的加工量,并且经测量验证:船模曲面的尺寸精度、形位精度和光顺效果,较传统的制作方法均有显著提高,满足船模曲面数控加工的要求。     

Decision Model for Market of Performing Arts with Factorization Machine

Performing arts and movies have become commercial products with high profit and great market potential. Previous research works have developed comprehensive models to forecast the demand for movies. However, they did not pay enough attention to the decision support for performing arts which is a special category unlike movies. For performing arts with high-dimensional categorical attributes and limit samples, determining ticket prices in different levels is still a challenge job faced by the producers and distributors. In terms of these difficulties, factorization machine (FM), which can handle huge sparse categorical attributes, is used in this work first. Adaptive stochastic gradient descent (ASGD) and Markov chain Monte Carlo (MCMC) are both explored to estimate the model parameters of FM. FM with ASGD (FM-ASGD) and FM with MCMC (FM-MCMC) both can achieve a better prediction accuracy, compared with a traditional algorithm. In addition, the multi-output model is proposed to determine the price in multiple price levels simultaneously, which avoids the trouble of the models’ repeating training. The results also confirm the prediction accuracy of the multi-output model, compared with those from the general single-output model.     

EFFECTS OF PASSIVE STRETCH ON SOLEUS MUSCLE ATROPHY IN IMMOBILIZED RATS

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一种工作流管理系统的模型化简方法

针对大规模复杂工作流管理系统的性能分析问题,将一个基于随机Petri网的模型化简算法应用于实际的工作流管理系统,即首先将工作流管理联盟定义的工作流模型映射为随机工作流网,在随机工作流网的4种基本模型的基础上.利用PH分布对简化之后的模型进行性能分析.通过供应链系统模型的化简与实际情况的比较,验证了本方法能够对大规模复杂随机工作流网的模型进行化简,降低了计算复杂度,同时也为工作流管理系统的性能分析提供了有效的方法.     

CO_2超临界流体萃取丹参中的有效成分

目的　建立CO2 超临界流体萃取丹参中有效成分的方法 ,并用高效液相 质谱法进行产物分析。方法　以 95 0mL·L-1乙醇为夹带剂 ,在 2 0MPa、4 5℃条件下 ,萃取丹参药材 1h后 ,再在 30MPa、6 5℃条件下 ,以 10 0mL·L-1的乙醇为夹带剂萃取 2h ,并将超临界萃取法与回流提取法、超声提取法进行了比较。结果　超临界萃取法萃取的成分最多 ,萃取效率也高于其他两种方法。结论　超临界萃取法提取丹参中有效成分耗时少、准确、效率高且提取完全。     

国防交通信息资源建设对策研究

未来信息化战争强调以信息优势抢占军事信息战略的制高点,加强我军国防交通信息资源建设时不我待。从国防交通信息资源的概念人手,分析了当前我军国防交通信息资源建设存在的突出问题,提出了加强国防交通信息资源建设的几点建议。     

Modified QUICK schemes for 3D advection-diffusion equation of pollutants on unstructured grids

In the framework of finite volume method (FVM), two modified schemes of quadratic upstream interpolation for convective kinematics (QUICK), namely quasi-QUICK (Q-QUICK) and normal quasi-QUICK (NQ-QUICK), for improving the precision of convective flux approximation are verified in 3D unsteady advection-diffusion equation of pollutants on unstructured grids. The constructed auxiliary nodes for Q-QUICK or NQQUICK are composed of two neighboring nodes plus the next upwind node; the later node is generated from intersection of the line of current neighboring nodes and their corresponding interfaces. The numerical results show that Q-QUICK and NQ-QUICK overwhelm central differencing scheme (CDS) in computational accuracy and behave similar numerical stability to upwind difference scheme (UDS), hybrid differencing scheme (HDS) and power difference scheme (PDS) after applying the deferred correction method. Their corresponding CPU time is approximately equivalent to that of traditional difference schemes. In addition, their abilities for adapting high grid deformation are robust. It is so promising to apply the suggested schemes to simulate pollutant transportation on arbitrary 3D natural boundary in the hydraulic or environmental engineering.