Observation of currents in the southern Yellow Sea in the summers of 2001 and 2003

Long term current observations in the southern Yellow Sea are very scarce because of the intense fishing and trawling activities. Most of the previous studies on tides and circulation were not rigorously validated with direct current measurements. In this study, tidal and sub-tidal currents were examined using current profiles from three bottom-moored Sontek Acoustic Doppler Profilers （ADPs） deployed in the southern Yellow Sea in the summers of 2001 and 2003. The measured current time series were dominated by tidal currents. The maximum velocities were between 40-80 cm s^-1 at the mooring stations. The M2 current was the dominant primary tidal constituent, while the MS4 and M4 components produced the most significant shallow water tidal currents with much weaker amplitudes. The measured mean sub-tidal velocities were less than 5 cmsl. The mean flows in the lower layer implied that an anti-cyclonic circulation pattern might exist in the deeper central Yellow Sea. However, the previously expected cyclonic circulation pattern in the upper layer was not clearly shown by the observations.     

利用潮汐动力减轻深圳河污染的水力条件计算分析

建立了深圳河非恒定流数学模型，模型中考虑了过闸水头突变的计算方法，采用拉格朗日法研究深圳河上游的罗芳污水处理厂和滨河污水处理厂所排出污水沿深圳河的运动过程，计算分析了利用潮汐动力减轻深圳河污染的水力条件。结果表明，深圳河口建闸3种不同调控方案下污水运移至深圳河口的总时间有所增加，这对于减轻深圳河的污染情况不利；从大鹏湾抽调清水以增加上游来水量则会大大缩短污水运移至深圳河口的时间，从而减轻深圳河的污染状况。     

剖面法测量近岸水体遥感反射率的新方法

光学剖面法是测量遥感反射率的首选方法。根据我国近岸水体的特点,提出采用下行辐照度剖面补偿剖面测量时环境影响的方法,估算水面之下遥感反射率[rrs(λ)]。从对实际测量数据的应用效果可见,同站位多次测量的rrs(λ),其相对偏差可控制在10％之内。     

二种多管水母光蛋白基因的分离、表达及生物活性初步研究

分别从厦门东海域的大型多管水母和细小多管水母中分离到了新的光蛋白基因aeqxm和aeqxxm,并在大肠杆菌中进行了表达.aeqxm和aeqxxmDNA序列的编码区总长均为585bp,无内含子序列,推导的氨基酸序列总长均为195个氨基酸.aeqxm,aeqxxmDNA和AEVAQ440XcDNA之间的核苷酸序列同源性分别为80.7%,85.1%,aeqxm和aeqxxmDNA的核苷酸序列同源性为87.2%.原光蛋白apoaeqxm,apoaeqxxm与AEVAQ440X编码的氨基酸序列之间的同源性分别为84.7%,84.2%,apoaeqxm和apoaeqxxm的氨基酸序列之间的同源性为94.4%.分别将aeqxm和aeqxxm基因克隆至pTO-T7表达载体,apoaeqxm,apoaeqxxm在大肠杆菌中的表达量都达到40%左右.取菌体超声上清与腔肠动物荧光素f、巯基乙醇混合再生后,加入CaC_l2,用荧光全谱仪检测到470nm处的瞬时发光,表明表达的apoaeqxm,apoaeqxxm具有正常的生物学功能.     

近江牡蛎的染色体组型

以近江牡蛎的担轮幼虫为材料,采用秋水仙素——低渗处理——空气干燥制片法制作染色体标本,对其核型进行分析,结果表明,近江牡蛎体细胞染色体数目2n=20,NF=40,核型公式为20m。     

星系巡天中的线性红移畸变效应

在红移巡天中，由于星系本动速度的存在，星系的三维空间分布图像将会发生畸变，这种效应使得我们可以用动力学与统计方法，通过测量线性红移畸变因子来获取宇宙中大尺度上物质分布的信息，介绍了线性红移畸变效应的图像、理论，以及线性红移畸变因子β的测量方法和一些最新结果。     

滇南南丙河金异常查证及找矿效果

异常区位于含金褐铁矿化硅化破碎带中,通过加密地质测量、土壤测量、岩矿分析、工程揭露等组合手段,在含金蚀变带找到工业矿体,取得找矿突破。     

国际测绘机构及专家管理信息系统的设计与实现

分析了建立国际测绘机构及专家管理信息系统的必要性，介绍了VB，NET技术和ADO数据库访问技术的功能特点及关键技术的应用，阐述了该管理信息系统的设计与实现过程。     

烟囱模型动力试验研究

烟囱结构的地震反应及其破坏机理是地震工程界长期讨论的问题，对高耸烟囱结构的模型试验研究是研究此工程问题的重要方法，作者通过对45m和180m高大烟囱结构的动力模型试验，对烟囱结构的地震反应及其破坏机理进行了模型试验研究，得出了有意义的结论，为这一问题的理论研究提供了有力的依据。     

On stochastic stability of regional ocean models to finite-amplitude perturbations of initial conditions

We consider error propagation near an unstable equilibrium state (classified as an unstable focus) for spatially uncorrelated and correlated finite-amplitude initial perturbations using short- (up to several weeks) and intermediate (up to 2 months) range forecast ensembles produced by a barotropic regional ocean model. An ensemble of initial perturbations is generated by the Latin Hypercube design strategy, and its optimal size is estimated through the Kullback–Liebler distance (the relative entropy). Although the ocean model is simple, the prediction error (PE) demonstrates non-trivial behavior similar to that existing in 3D ocean circulation models. In particular, in the limit of zero horizontal viscosity, the PE at first decays with time for all scales due to dissipation caused by non-linear bottom friction, and then grows faster than (quasi)-exponentially. Statistics of a prediction time scale (the irreversible predictability time (IPT)) quickly depart from Gaussian (the linear predictability regime) and becomes Weibullian (the non-linear predictability regime) as amplitude of initial perturbations grows. A transition from linear to non-linear predictability is clearly detected by the specific behavior of IPT variance. A new analytical formula for the model predictability horizon is introduced and applied to estimate the limit of predictability for the ocean model.