初诊为抑郁症的老年隐球菌性脑膜炎6例报告

目的:探讨老年隐球菌性脑膜炎发病特点和误诊原因。方法:分析6例初诊为抑郁症的老年隐球菌性脑膜炎患者的临床表现、脑脊液特点、治疗和预后表现,以明确发病特点和误诊原因。结果:6例病例初期均表现为头晕、失眠、食纳减少;后期出现颅内感染相对特异症状:认知障碍5例、头痛3例、肢体无力3例、发热2例。脑脊液隐球菌培养阳性明确诊断,抗真菌治疗有效。6例均好转,但是2例患者遗留明显后遗症:1例患者遗留明显的认知障碍和双下肢活动受限,1例双眼失明,2例确诊时间为2、4周。结论:老年患者患病后临床症状常不典型,当一种疾病不能解释所有症状时,需开拓思路,积极完善相关检查,必要时请相关科室协助诊治,尽量减少误诊。福建省厦门市科技局资助项目(项目编号：3502Z20084019

Study of hydrodynamics and its impact on mariculture carrying capacity of Sanggou Bay:observation and modeling

主要介绍了从动力学研究桑沟湾养殖容量的主要思路、方法及结果。研究以精细过程观测为基础,以数值模型为手段,从物理海洋学角度考察养殖海区水动力特征,研究水动力对物质循环的影响、对颗粒态/溶解态营养物质的补充和对养殖生物量的影响,探寻不同养殖模式效果的技术路线;介绍了两个航次设计方案与目的。通过观测发现养殖对水动力垂直结构有很大影响,底层流速最大并滞后表层,发现弱动力条件下海底颗粒物和营养盐无法进入水体上层的事实。据此提出双边界层动力模型,建立一维数值模型进行机制探讨,将养殖阻力三维化建立水动力数值模型,定量给出养殖对水动力和水交换的阻碍;以此驱动三维养殖生态模型,充分考虑养殖对水动力的影响、水动力对生源要素的输运。建立了一个真正的物理-生物过程耦合模型。利用该模型进行的数值模拟和实验表明,贝藻兼养多元养殖是健康、高效养殖的有利措施;桑沟湾在现有养殖模式下,目前已基本达到了它的养殖容量,养殖品种分布不变,减少养殖密度至目前的0.9倍会略微提高产量,降低成本;减少湾口海带养殖密度,会大幅度提高贝藻兼养区的营养盐总量和养殖生物产量,从海带与贝类经济价值对比会有更高的效益。人为提高水动力混合或许是解决湾内营养盐缺乏的途径。The background and themes of dynamic study on mariculture carrying capacity of Sanggou Bay were described.The method used for this study was based on the fine processes observation,using physical oceanography theory and numerical model to examine the interaction between mariculture and hydrodynamics in Sanggou Bay.Design proposal and purposes for two cruises were introduced.Based on the observation we found that the kelp and the raft influenced the current vertical structure greatly,and the maximum velocity was at the lower layer with strong phase delay.It was also found that the damped current was too weak to mix the sediment detritus and nutrients into the upper layer.Based on these discoveries a double drag-boundary hydrodynamic model was proposed by adding the aquaculture drag at surface.The mechanism of kelp influence on the current profile was studied numerically by a one-dimension model.Considering the kelp drag in the water column besides the boundary drag,a three-dimension hydrodynamic model was adopted to quantify the influence of the aquaculture on hydrodynamics and water exchange of Sanggou Bay.A physical-biological coupled aquaculture ecosystem model was established using DIN,POM concentration and phytoplankton with kelp biomass as variable.The simulation and numerical experiments showed that polyculture was a useful method for healthy and high-efficiency aquaculture.Sanggou Bay has nearly reached its capacity under present aquaculture mode.By cutting down aquaculture density to 0.9 fold of the present density,the total production of kelp will slightly increase and the cost will be reduced.Cutting down the kelp density at the mouth of the bay could greatly enhance the amount of nutrients and biomass in the kelp-bivalve-culture area in the inner side.Artificial mixing might bring more nutrients from seabed in the bay.国家基础研究规划重点项目(2006CB400602);国家重点基金项目(40830854)共同资

Morphology and Magnetic Property of Iron-Nickel-Cobalt Series Alloy by Electrodeposition

软磁材料是支持和促进社会发展的重要材料,在机电、仪器仪表等产业得到了广泛的应用.该论文研究运用电沉积法制取铁镍钴系合金箔软磁材料的工艺技术,并研究它们的金相结构与磁性能.分别在静态、动态、含添加剂、超声波辅助条件下进行了60μm厚纯镍箔的电沉积实验.为了进一步考察铁镍钴系合金箔的微观形貌,对电沉积得到的各种合金箔进行了SEM形貌分析.研究考察了电沉积铁镍钴系合金箔的磁性能,结果表明,电沉积镍基Ni-Fe合金箔在剩余磁通密度、矫顽力和磁导率方面的性能明显优于轧制坡莫合金,电沉积铁基合金箔的饱和磁通密度可达到2.25T.它们都可作为优良的软磁材料

电沉积Fe、Ni基合金箔的组织形貌及磁性能

采用电沉积方法，制备了铁箔、铁基合金(Fe-Ni，Fe-Co，Fe-Ni-Co)、镍箔、镍基合金(Ni-Fe)箔，利用扫描电镜观察了金属箔的组织形貌，直流开路磁场下测定了电沉积金属箔的基本磁性能。实验表明：电沉积铁基合金箔晶粒小于10μm，电沉积镍基合金箔晶粒大小在2μm左右；电沉积Fe-Ni合金箔是一种性能良好的软磁材料，其基本磁性能优于传统熔铸-轧制坡莫合金1J79

电沉积Fe、Ni基合金箔的组织形貌及磁性能

采用电沉积方法，制备了铁箔、铁基合金(Fe-Ni，Fe-Co，Fe-Ni-Co)、镍箔、镍基合金(Ni-Fe)箔，利用扫描电镜观察了金属箔的组织形貌，直流开路磁场下测定了电沉积金属箔的基本磁性能。实验表明：电沉积铁基合金箔晶粒小于10μm，电沉积镍基合金箔晶粒大小在2μm左右；电沉积Fe-Ni合金箔是一种性能良好的软磁材料，其基本磁性能优于传统熔铸-轧制坡莫合金1J79

电沉积Fe、Ni基合金箔的组织形貌及磁性能

采用电沉积方法,制备了铁箔、铁基合金(Fe Ni,Fe Co,Fe Ni Co)箔、镍箔、镍基合金(Ni Fe)箔,利用扫描电镜观察了金属箔的组织形貌,直流开路磁场下测定了电沉积金属箔的基本磁性能。实验表明:电沉积铁基合金箔晶粒小于10μm,电沉积镍基合金箔晶粒大小在2μm左右;电沉积Fe Ni合金箔是一种性能良好的软磁材料,其基本磁性能优于传统熔铸-轧制坡莫合金1J79