中性载体DAM推动Ca^2＋离子在水／硝基苯界面的转移

本文用卷积(半微分和半积分)循环伏安法研究了中性载体DAM(二安替比林甲烷)络合推动Ca~(2 )离子在水/硝基苯界面的转移过程,探讨了有关转移过程的机理,测定了相应的扩散系数和配合物的络合稳定常数。     

在不同水硬度下铜对草鱼、鲢和大鳞泥鳅的急性毒性

实验以草鱼、鲢和大鳞泥鳅的鱼苗为材料,测定了水硬度对铜的急性毒性的影响,水硬度在255、141、37和14mg/L(以 CaCO_3计)时铜对草鱼的48小时 LC_(50)分别是519、354、91和76μg/L,96小时 LC_(50)则分别为460、307、67和39μg/L.在同样的硬度条件下,对鲢的48小时 LC_(50)是452、393、71和40μg/L,96小时 LC_(50)分别为452、296、41和31μg/L.大鲢泥鳅鱼苗在硬度260、137、36和10μg/L(以 CaCO_3计)条件下,铜的48小时 LC_(50)为369、305、1113和67μg/L,而96小时 LC_(50)则分别是226、135、67和18μg/L.铜的急性毒性和水硬度之间的关系可用下列方程来描述:草鱼 ln96小时■_(50)=1.1345+0.9051ln 硬度 r=0.99ln96小时■_(50)=2.2118+0.7220ln 硬度 r=0.97鲢 ln96小时■_(50)=0.4564+1.0207ln 硬度 r=0.97ln96小时■_(50)=1.1371+0.9232ln 硬度 r=0.98大鳞泥鳅ln96小时■_(50)=1.2823+0.7506ln 硬度 r=0.99ln96小时■_(50)=2.8635+0.5563ln 硬度 r=0.99     

废水处理系统中功能菌株特异分子标记

用40条10碱基随机引物对油脂化工废水处理系统中分离到的降解脂肪酸和脂肪胺功能菌株FA-2。FA-3及对照菌株进行RAPD分析。筛选出长度为700bp的FA-2的特异性片段,并克隆到pMD 18-T载体上．根据测序结果,设计了1对SCAR(sequence characterized anlplfied region)引物,通过SCAR-PCR反应,获得SCAR标记,并通过对20个培养样品进行PCR扩增,验证了标记特异性．结果表明该标记可作为特异的分子标记用于污水处理系统中功能菌株FA-2的监测．     

多传感器阵列信号的分布式恒虚警检测

对于均匀Gauss背景中的Swerlling II型起伏目标的多传感器分布式恒虚警检测,为了充分利用阵列雷达接收信号间的相位关系,采用了相干检波信号处理方式.针对局部检测统计量信息量大,通信带宽小的特点,结合实际检测中信号强度未知等困难,提出了广义似然比恒虚警(GLR-CFAR)局部处理算法.仿真结果表明,该检测方式性能接近最优性能,传感器积累对信噪比改善明显,达到3～7 dB, 提高小信号目标的检测概率,且具有实现简单的优点.因此,此方法适合用于多雷达检测场合.     

“三环制“供热系统中热水一级网运行计算研究

针对"三环制"供热系统,建立了热水一级网("二环")运行调节曲线数学模型,从而实现"三环制"供热系统连锁调节和自动控制,达到最大限度的节能.     

壳聚糖季铵盐晶体的制备及其抑菌、柔软剂性能

采用异相法制备了水溶性的羟丙基三甲基氯化铵壳聚糖 (HACC)晶体 ;测定了它对枯草芽孢杆菌等微生物生长的抑制效果 ;并研究了由HACC复配而成的微乳液在织物柔软处理中的应用性能。     

"软工程"战略与西北干旱半干旱区水资源的合理利用

在简述了西北干旱半干旱区水资源特点与问题的基础上,分析了水资源浪费的主要原因,提出了水资源合理利用的“软工程”战略及其具体措施,强调从改善水资源环境,建立节水型社会及治理水土流失等方面来利用与配置干旱半干旱区的水资源。     

Supergene mobility of noble metal elements in black rock series

In order to discuss the supergene mobility of noble metal elements in black rock series, measurements have been conducted with ICP-MS method for the contents of Ru, Rh, Pd, Ir, Pt, Au and Ag in the primary jordisite-rich black shale ore, in the supergene leached jordisite-rich black shale ore, in the pyrite-rich black shale ore and in the water of pit, well and stream of the mining area near Zhongnan Village, Zunyi District of Guizhou Province. The temperature, pH, electric conductivity, dissolved oxygen of the water were also measured. The pit water is acidic with high electrical conductivity and low dissolved oxygen. The total content of platinum group elements in the primary pyrite-rich black shale ore is only 1/13 of that in the primary jordisite-rich black shale ore. The Ag content in the former is only a half of that in the latter while the Au contents in the two kinds of ores are almost the same. Being leached under supergene condition, the contents of most of the noble metal elements except Au in the jordisite-rich black shale ore greatly decrease; the leaching rates of Rh, Pd, Pt, the total platinum group elements and Ag reach as high as 66.72%～74.79%, revealing that under supergene condition, platinum group elements and Ag can migrate along with water; the ratios of Ag/Au, Pd/Ru, Pt/Ir and(Pt+Pd)/(Ru+Rh+Ir) are remarkably decreased, displaying that Pt and Pd relative to Ru, Rh and Ir, Ag relative to Au bear more active mobility. The noble metal elements in the black rock series near Zhongnan Village might be mobilized and migrate under the procession of "cold water" rich in [SO4]2- with pH value being about 2.4 at a temperature below 50 ℃.     

Model of production planning and scheduling in shop floor based on collaboration and competition

The planning and scheduling in real shop floor is actually achieved by coordination between different persons. In this process, cooperation is mainstream, but competition also exists, for example, the competition between different groups, operators with the same skill, etc. In multi-agent based shop floor management and control system, this competition and cooperation relation must be embodied. The general process of shop floor production planning and scheduling is studied, and a colored Petri-net model for the competition and cooperation process of three main agents in such system to achieve shop floor production planning and scheduling is presented. The evaluating method of bids in bidding process that especially embodies the competition relationship is also presented. This colored Petri-net model gives a clear illustration of this complex coordination process to system designers, effectively promotes the cooperative development. Foundation item: Supported partly by the Hi-tech Program of China (China 863) (No. 863-511-943-009) and the National Natural Science Foundation of China(No. 59990470) Biography: Liu Shi-ping(1971-), male, Ph. D. candidate, research direaction: CIMS, intelligent manufacturing.     

基于使用活动对象的服务器集群的负载均衡系统

提出了一种基于使用活动对象的服务器集群的负载均衡系统,该系统由分布式同构的服务器组成,每个服务器有一个监视并控制服务器负载的负载均衡器,各负载均衡器能相互通信。分布式负载均衡器以对等结构（Peer-to-peer,P-to-P)方式通信,不适合C／S（Client/server)模式,但适合对等结构模式。为此,采用了一种基于分布式活动对象结构的Java程序库“CAPE”,利用Java程序库能较好地实现负载均衡系统。