利用卫星高度计资料进行多年一遇极值波高推算的方法研究
韩树宗1 王海龙2
郭佩芳1
(1中国海洋大学，青岛
266003；2中国科学院南海海洋研究所，广州 510301)
摘 要：
根据卫星高度计资料的特点，在对3个海洋站的海浪极值推算中引用发展了尾部分布增强法(Tail Distribution
Method)，并且与3个海洋站实测资料推算结果相比较，结果良好。以此为基础对西北太平洋进行多年一遇极值推算，其多年一遇的极值分布与风场的分布是一致的，主要呈纬向带状分布特征：从35°N～55°N，145°E～180°E的长方形海域，长时间受到季风的作用并且海域开阔，所以它的百年一遇波高可以达到13m以上；而在赤道无风带控制下的海域，它的百年一遇波高一般为7m左右。
关键词： 卫星高度计；
随机海浪； 极值推算； 阀闸值；
尾部增强法
中图法分类号： TP79;P731.22
文章编号： 1001-1862(2003)05-657-08
A Study of Extreme
SWH Estimation Method
by Using Satellite
Altimeter Data
Han Shuzong1 Wang
Hailong2 Guo Peifang1
(1 Ocean University of China, Qingdao
266003, China； 2 South China Sea Institute of Oceanology, Chinese Academy Of Sciences, Guangzhou 510301,
China)
Abstract： Based on
the characteristics of satelliter altimeter data, the Tail
Distribution Method were introduced and developed to estimate the extreme
significant wave height at three coastal stations by using the
altimeter data.
The estimation results are compared with those calculated by
traditional method
using observed wave data, and they are found to be satisfactory. The
T
OPEX/POSEIDON
satellite data from October 1992 to February 1998 was used to estimate the
extreme significant wave height in the
Key words： satellite altimeter;
stochastic waves; extreme
SWH estimation; threshold values;
tail distribution method
大沽河干流青岛段水环境容量研究
张 俊1 佘宗莲1 王成见2 孙宝权2
（1
中国海洋大学环境科学与工程学院，青岛 266003；2 青岛市水文水资源勘测局，青岛 266071）
摘 要：
本文根据大沽河的水流特性和水文、水质实测资料，利用QUAL2E综合水质模型，分析确定了大沽河干流丰水期和平水期的水环境容量。又利用水库水环境容量的计算方法，确定了大沽河干流枯水期的水环境容量。大沽河干流水环境容量的确定，可用于河流的水质模拟和预测，为实施大沽河污染物总量控制提供基础资料，为大沽河流域水污染控制的管理和决策提供科学依据。
关键词： QUAL2E水质模型； 水环境容量； 总量控制；
大沽河
中图法分类号： X141 文章编号：
1001-1862(2003)05-665-06
Study on the Water
Environmental Capacity of the Mainstream
of the Dagu River（Qingdao Reach）
Zhang Jun1 She Zonglian1 Wang Chengjian2
Sun Baoquan2
(1 College of
Environmental Science and Engineering， Ocean University of China， Qingdao 266003，
China;
2 Hydrology and Water Resources
Reconnaissance Bureau of Qingdao，
Qingdao 266071， China)
Abstract： In this
paper
based on the flow characteristics, hydrological data and
water quality data of the
Key words：
QUAL2E； water environmental
capacity； total amount control; the
研究简报
菲律宾蛤仔（Ruditapes
philippinarum）唇瓣的表面结构
范瑞青1
（中国海洋大学1环境科学与工程学院；2海洋生命学院，青岛 266003）
摘 要：
用扫描电子显微镜技术研究了菲律宾蛤仔唇瓣的表面结构。结果表明：菲律宾蛤仔唇瓣分为光滑面和褶皱面。光滑面细胞排列紧密，细胞表面有大量的微绒毛，纤毛较少，呈簇状分布；褶皱面具沟和嵴，嵴上被覆浓密的纤毛。光滑面和褶皱面的纤毛在末端膨大呈勺状，两面都有大量黏液细胞分布。纤毛和黏液在食物选择和运输中起重要作用。
关键词： 菲律宾蛤仔； 唇瓣； 结构； 纤毛； 微绒毛
中图法分类号： Q178.53；Q13
文章编号： 1001-1862(2003)05-671-04
Exterior Structural
Studies on the Labial Palps of Ruditapes
philippinarum
Fan Ruiqing1 Jiang Ming1 Gao lan1 Ru
shaoguo2
(
2 College of Marine Life Sciences， Qingdao 266003,
China;)
Abstract： The
exterior structure of the labial palps of Ruditapes
philippinarum was studied using the scanning electron microscope. The
results indicate
that a labial palp of the Ruditapes philippinarum has a ridged surface and a
smooth surface. The cells of the smooth surface are arranged compactly.There are
fewer cilia on the smooth surface and they are distributed in a
cluster.There are a
great number of microvilli on the cells.The ridged surface is folded
into deep ridges and grooves.The ridges are covered with dense cilia.
The end of each
cilium on the smooth and ridged surfaces expands and is scoopshaped. There
are a great many mucous cells on both surfaces of the labial palps.The cilia
and the mucous cells play important roles in choosing food particles
and
delivering food to the mouth.
Key words： Ruditapes philippinarum;
labial palp;
ultrastructure; cilia;
microvillus
风暴浪导致的黄河口水下土体破坏试验研究
许国辉 单红仙 贾永刚 霍素霞
（中国海洋大学环境科学与工程学院，青岛 266003）
摘 要：
本文试验利用取自黄河水下三角洲的样品，重塑后铺设水槽底床进行水槽试验，并利用原状土进行动三轴试验，2种试验均测定土体内的孔隙水压力。根据各种情况下孔隙水压力的变化记录，表明土体破坏同时其孔隙水压力产生骤变。将本文试验结果与在黄河水下三角洲不稳定区的原位沉积动力学试验孔隙水压力测试结果对照，说明黄河三角洲水下斜坡某些土体的破坏，未出现波浪循环荷载作用下孔隙水压力积累升高
所导致的土体液化破坏，而是风暴浪对海底的强切应力作用致使土体产生剪切破坏。
关键词： 黄河三角洲； 孔隙水压力；
风暴浪
中图法分类号： X144
文章编号： 1001-1862(2003)05-675-05
Test of Soil Failure
Under Storm Wave Loadings on the
Xu Guohui Shan
Hongxian Jia Yonggang Huo Suxia
(College of Environmental Science and
Engineering,
Abstract： A flume
test was conducted with remolded soil samples obtained
from the Yellow River Subaqueous Delta. A dynamic triaxial test on undisturbed samples
was also conducted. The test records indicated that the value of pore water
pressure changed abruptly when the soil failed. Contrasting the experimental results
in this paper with the results of pore water pressure from insitu
dynamic sediment test, it was found that the soil failed on the Yellow
River
Subaqueous Delta not because the value of pore water pressure piled up
under cyclic
wave loading, leading to soil liquefaction, but beause the action of
strong shearing
stress on the seabed by storm wave loading.
Key words： Yellow
River Subaqueous Delta;
pore water pressure; storm wave loading
二重孔隙介质地下水溶质运移模型应用研究
赵全升1 戴其祥2
吕月娥3 孔范龙1
(1 青岛大学环境科学与工程系，青岛 266071; 2
水利部黄河水利委员会勘
测规划设计研究院， 郑州 450003； 3
青岛大学电子信息科学与技术系， 青岛 266071)
摘 要：
为比较准确地模拟二重孔隙介质地下水溶质运移，本文依据二重孔隙介质法，分别对孔隙岩块和裂隙介质建立相应的溶质运移模型，将孔隙岩块视为作用于裂隙介质的源或汇，对反映岩块和裂隙介质之间物质交换的耦合项进行了数学推导。应用本文方法在济南地区建立起二重孔隙介质溶质运移模型。研究结果表明，此方法更实际地反映出裂隙对溶质较强的传导能力和孔隙岩块对溶质较强的贮存能力。
关键词： 裂隙孔隙介质; 二重孔隙介质; 地下水； 溶质运移
中图法分类号： X143
文章编号： 1001-1862(2003)05-680-07
Application Research
on Groundwater Solute Transport in
DualPorosity Media
Zhao Quansheng1 Dai Qixiang2 Lv Yue'e3 Kong Fanlong1
(1 Environment Science and Engineering
Department,
2 Institute of Reconnaissance, Planning, Design
and
Research,YRCC,
3 Electronic Communication Science and
Technique Department,
Abstract： In order to simulate solute
transport accurately in fractured porous media, by
using the dualporosity media
method, a rock massmodel and a
fracture model are set up in this paper, in which the rock mass is
regarded as a
source or sink of the fracture media. The coupling term reflecting mass exchange
between the rock mass and the fracture media is derived. A model with a dualporosity
medium is established for the Jinan area. The results show that this method can
better reflect the strong conduction of solute through fractures and the
strong storage capability of rock mass for solute.
Key words： fractured
porous media; dualporosity media; groundwater; solute
transport
海带膳食纤维的提取与功能性试验
李来好1，2 陈培基2 李刘冬2 杨贤庆2
吴燕燕2
刁石强2 薛长湖1
（1
中国海洋大学水产学院，青岛 266003；2 中国水产科学研究院南海
水产研究所，广州 510300）
摘 要： 采用酶技术和化学处理相结合的方法，研究了海带膳食纤维的工艺技术，筛选出海带膳食纤维提取和漂白的最佳工艺条件，提取出海带膳食纤维产品，并进行人体的功能性试验。结果表明，海带膳食纤维的产率达27.3%，颜色为类白色，膳食纤维含量达73.3%，钙含量7.5%，膨胀力为55mL/g,持水力为2
650%；海带膳食纤维的功能性优于小麦麸皮膳食纤维，对便秘患者具有良好的疗效。
关键词： 海带； 膳食纤维；提取工艺；
功能性
中图法分类号： S985.49 文章编号：
1001-1862(2003)05-687-08
Extraction of
Dietary Fiber from Laminaria Japonica and Testing of Its Functional
Property
Li Laihao1,2 Chen
Peiji2 Li Liudong2 Yang Xianqing2 Wu Yanyan2 Diao Shiqiang2 Xue Changhu1
（1 College of
Fisheries, Ocean University of China, Qingdao 266003；
2 South China Sea Fisheries
Research Institute, CAFS,
Abstract: In this
paper the
techniques of producing dietary fiber from
Laminaria japonica is studied. The optimum technological conditions for the extracting and bleaching of
dietary fiber from Laminaria
japonica have been obtained by enzymolysis and chemistry treatment
methods. The functional property
of the dietary fiber from Laminaria
japonica is tested by human body
taking it orally. The results show that the yield of dietary fiber of
Laminaria japonica
is 27.3% , and the color is nearly white. The dietary fiber and
calcium contents are 73.3% and 7.5% respection. The expansion capacity
and water holding
capacity are 55mL/g and 2 650% respectively. The functional property of
dietary fiber from Laminaria japonica is better than wheat bran,
and dietary fibers
from Laminaria japonica have a good curative effect for constipation
patients.
Key words： Laminaria
japonica； dietary fiber； extraction；
functional property
裤式拖网法校核试验和网形分析
唐衍力1 梁振林1
Arill Engas2 Kjell Gamst2
(1中国海洋大学水产学院，青岛
266003; 2 挪威海洋研究所，卑尔根 5817)
摘 要： 裤式拖网法是渔具选择性研究方法之一，其网形和校核试验于2002年1月在挪威特鲁姆瑟海湾进行。在115～270m的水深范围内，测量的裤式拖网网口的水平扩张平均为(23.27±0.26)m，网口高度为(6.53±0.12)m；右网囊对左网囊的虾渔获物重量之比为1.00±0.04，右网囊对左网囊的渔获物尾数之比为1.08±0.09， 渔获物种类及体长频率分布相似，基本符合用裤式拖网法进行选择性研究的要求。
关键词： 裤式拖网； 网形； 选择性
中图法分类号： S972.13 文章编号：
1001-1862(2003)05-695-06
Calibration of the
Trouser Trawl and Analysis of the Net
Form
Tang Yanli1 Liang
Zhenlin1 Arill Engas2 Kjell Gamst2
(1 College of
Fisheries,
(2 Fish Capture Division,
Abstract: The trouser trawl method is one
of the methods of measuring the
selectivity of towed fishing gears. The experiments of the net form
and the
calibration of the trouser trawl were carried in
Key words: trouser
trawl； net form； selectivity
文蛤（Meretrix meretrix
Linnaeus）外套膜的组织学与组织化学研究
任素莲 张艳艳
宋微波
（中国海洋大学海水养殖教育部重点实验室，青岛 266003）
摘 要：
利用组织学和组织化学染色方法对文蛤外套膜进行了研究。结果表明，文蛤外套膜具有双壳贝类外套膜的典型结构特征，即由中央膜与边缘膜组成，边缘膜具有3个突起。组织结构包括内外上皮层、结缔组织与肌纤维。不同部位的外套膜，其上皮细胞的形态结构、结缔组织与肌纤维含量等有差异。上皮细胞与结缔组织中分布有几种不同类型的粘液分泌细胞。组织化学研究结果显示，缘膜突起上皮细胞内含有丰富的糖类。分泌细胞内含物中含有丰富的糖类和少量的RNA，同时在分泌细胞检测到较强的ACP酶活性。
关键词： 文蛤； 外套膜；组织学；
组织化学
中图法分类号： Q914 文章编号：
1001-1862(2003)05-701-06
Studies on the
Histology and Histochemistry of the Mantle of Meretix meretrix
Linnaeus
Ren Sulian Zhang Yanyan Song
Weibo
(The Key Laboratory of Mariculture,
Ministry of Education,
Abstract： The microscopic anatomy of the
mantle of Meretrix meretrix Linnaeus is described
through histological and
histochemical techniques. The typical structure of the mantle of bivalve
consisting of a middle zone and a marginal zone is
observed. There are three protuberances in the marginal zone. The
mantle is composed of inner epithelium, outer epithelium, connective tissue and
muscular fiber. Several kinds of secreting cells are distributed in
the epithelium and
the connective tissue. There is glucide in abundance in the epithelial cells of
protuberance. A large amount of glucide and a small amount of RNA are
observed in the secrete cells, where the strong activity of ACP is also
observed.
Key words： Meretrix
meretrix； mantle； histology； histochemistry
太阳能电池在深海抗风浪养殖网箱中的应用研究
宋协法 万 荣 梁振林
（中国海洋大学水产学院，青岛
266003）
摘 要： 根据目前我国深海抗风浪网箱电力设备的配置情况，通过对LA361K51S型太阳能电池性能的测试，确定了太阳电池的电流、电压、太阳强度及气温等随时间变化的规律以及天气变化情况对太阳电池的功率、转化效率的影响。在计算深海抗风浪网箱日用电量的基础上，对所需太阳电池的功率、蓄电池的容量进行了计算，并依此确定了深海抗风浪网箱配置太阳电池和蓄电池的规格及型号。
关键词： 抗风浪网箱；太阳电池； 功率； 蓄电池
中图法分类号： S951.5
文章编号： 1001-1862(2003)05-707-05
Research on the Application of
Solar Battery to the
Song Xiefa Wan Rong
Liang Zhenlin
（College
of Fisheries， Ocean University of China，Qingdao
266003， China）
Abstract： By
measuring the characteristics of model LA361K51S solar batteries，the temporal
variation of the electric current，voltage，sunlight
intensity and the effect of weather change on the battery efficiency and
transforming
efficiency were determined. The necessary power and the capacity of
the
accumulator were calculated according to the daily power consumation and the
status of electric
equipment in
Key words：
antistorm cage; solar battery; efficiency;
accumulator
华北半叶紫菜丝状体细胞凋亡过程的初步研究
汤晓荣1 姜 明1
费修绠2 段德麟2
（1中国海洋大学，青岛 266003；2中国科学院海洋研究所，青岛
266071）
摘 要： 本文对华北半叶紫菜丝状体细胞的凋亡过程进行了初步观察并对这一过程中细胞超微形态的变化进行了研究。结果表明，丝状体细胞
的凋亡过程是由分枝的端部细胞发生老化开始的，老化细胞的细胞内壁增厚；细胞核内染色质凝缩，核膜溶解；色素体片层结构变形、溶解；红藻淀粉电子密度显著下降，逐渐解体；胞浆中出现不规则形态的囊泡、髓样结构和结构特殊的小体；随着细胞的趋于凋亡，核、色素体、线粒体等细胞器相继溶解消失，细胞结构崩溃，细胞内壁明显增厚。细胞中的囊泡和髓样结构参与了细胞内壁的形成。本研究首次报道紫菜中存在细胞凋亡，并对丝状体细胞凋亡过程的生物学意义及髓样结构的功能进行了讨论。
关键词: 华北半叶紫菜；丝状体； 超微结构；
细胞凋亡
中图法分类号： Q178.53 文章编号：
1001-1862(2003)05-712-07
Preliminary Study on
the Apoptosis of
Porphyra conchocelis
Cells
Tang Xiaorong1 Jiang
Ming1 Fei Xiugeng2 Duan Delin2
(1 Ocean University of China, Qingdao 266003， China;
2 Institute of
Oceanology, Chinese Academy of
Sciences, Qingdao 266071, China)
Abstract: Apoptosis
of conchocelis cells of P. katadai var. hemiphylla was investigated primarily
and the ultrastructural changes during this process were studied. The results
show that the apoptosis begins with the senesces of the apical cells in
branches. The inner wall of the aging cell thickens, the chromatins inside the
nucleus condense and the nuclear membrane rupture.
The thylakoid structure distortes and breaks. The
electronic density of the floridean starch decreases significantly and
decomposes gradually. Irregularly shaped vesicles and marrow shaped structures
emerge in the cytoplasm. All cell apparatus, e.g. nucleus,
chromotophore as well as mitochondria decompose and disappear consequently so
that the cell structure finally breaks down with the inner wall of cell
thickened markedly. It was discovered that the vesicles and marrow-shaped
structures were involved in the deposition of the inner wall of cell.
Key words: Porphyra
katadai var. hemi
phylla; conchocelis; apoptosis; ultrastructure
烟台月亮湾岩岸潮间带底栖海藻
群落结构的季节变化
庄树宏1
陈礼学2
（烟台大学1
生物与化学理工学院；2 药学院 烟台 264005 ）
摘 要：
月亮湾岩岸潮间带底栖海藻群落的种类组成存在显著的季节差异，春季群落的种类最丰富（27种），其次为秋季群落（26种），夏季和冬季较少（22和21种），4个季节群落的共有种仅为7种。各季节群落中均以红藻的种类最丰富，褐藻次之，绿藻最少。在4个季节群落中生物量的变化如下：夏季>秋季>冬季>春季。绿藻和褐藻类群主要为暖温性种类，而红藻类群比较复杂，即有暖温带性的、温带和暖水性种类，也有寒温带的冷水性种类。4个季节群落的物种优势度序列存在明显的差异，海黍子在春季和冬季为群落的第1优势种，而孔石莼在夏季和秋季为第1优势种。不同季节群落多样性指数变化如下：物种丰富度指数，春季>秋季>冬季>夏季；物种多样性指数，秋季>夏季>春季>冬季；均匀度指数，春季>夏季>冬季>秋季。
关键词： 季节变化；潮间带； 底栖海藻； 群落； 生物量；
优势度；
烟台
中图法分类号 Q178.53；Q145+.1 文章编号：
1001-1862(2003)05-719-08
Seasonal Fluctuation
of Benthic Algal Community in the Rocky Intertidals of
Zhuang Shuhong Chen
Lixue
(Biol. Sci. and
Abtrasct: The
seasonal variation of species
composition of the benthic algal
communitys in the rocky intertidals
of Moon
Bay, Yantai is found to be remarkable.
The number
of species was the largestin spring which was 27, in autumn it was 26, ranking second, and
was the smallest in both
summer and winter. Only seven species were cominon in all the
four seasons of which
red algae was the richest in species while green algae the poorest. The
algal biomass fluctuation in the four seasonal communities was as
follows: in
summer> in autumn> in winter> in spring. The species of green and brown
algae found in the intertidal were mainly warm temperate, those
of red algae were more varied, however, including warm temperate, temperate and
subtropic as well as cold temperate species. There existed
significant
difference in species dominance among the four seasonal communities. The seasonal variation
of the index of abundance can be described as spring>autumn>winter>summer.For the
seasonal variation of the index of diversity, autumn>summer>spring>winter,
and for that of the index of evenness,
spring>summer>winter>spring.
Key words: seasonal
fluctuation； intertidal zone； benthic algae； community；
biomass； dominance； Yantai
龙须菜四分孢子体cDNA文库的构建
孙 雪 张学成 隋正红 茅云翔
（中国海洋大学海洋生命学院，青岛
266003）
摘 要：
为了研究不同世代和性别基因表达谱的差异，本文构建了龙须菜（Gracilaria
lemaneiformis）四分孢子体的cDNA文库。总RNA提取
使用RNeasy Plant Mini Kit（Qiagen），cDNA文库构建使用SMART cDNA Library
Construction
Kit（Clontech），包装蛋白购自Promega公司。该cDNA文库含有1.28×106个克隆，扩增文库的滴度是1.98×109 pfu/mL，重组频率是85.0%，插入片段几乎全部集中在500～1500
bp之间。
关键词： 龙须菜； cDNA文库；
四分孢子体
中图法分类号： Q943.2； Q344+.13
文章编号：1001-1862(2003)05-727-06
Construction of a
cDNA Library from the Tetrasporophyte of Gracilaria lemaneiformis (Rhodophyceae)
Sun Xue Zhang Xuecheng Sui Zhenghong Mao
Yunxiang
(College of Marine Life Sciences, Ocean
Abstract： In order to study the
differentially expressed genes in different phases and sexes of Gracilaria
lemaneiformis, a cDNA
library from the tetrasporophytic thalli was constructed. Total RNA was isolated by using RNeasy
Plant Mini Kit from Qiagen. The cDNA library was
constructed by SMART cDNA Library Construction Kit from Clontech,
while the packing
system was purchased from Promega. The constructed cDNA library contains
1.28×106 independent clones, the titer of the amplified library is
1.98×109 pfu/mL and the recombinant rate is 85.0% calculated by the
amplification of randomly
selected 20 clones. Of the amplified 17 clones, 16 insert DNAs range from 500
bp to 1500 bp in length and one is about 450 bp.
Key words： Gracilaria lemaneiformis; cDNA library;
tetrasporophyte
正弦干扰下时滞系统的状态预测观测器
与前馈反馈预测控制器设计
唐功友1 贾晓波1
张新荣2
(1 中国海洋大学计算机科学系，青岛 266003；2
山东轻工业学院机电工程系，济南 250100)
摘 要：
研究控制变量含有时滞的线性系统在外部正弦干扰下的最优减振预测控制问题。利用系统的控制向量和被控对象的预测输出向量，设计了1种全维状态预测观测器。并将该状态观测器用于时滞控制系统的最优前馈反馈预测控制中。频域分析表明，应用该状态预测观测器可将闭环系统的时滞项移至系统闭环结构之外，从而其优化控制规律完全可以按无时滞系统进行设计。时域分析表明，设计的预测控制器对外部正弦干
扰有较强的鲁棒性，得到的结果关于二次型平均性能指标是次优的。
关键词：
时滞系统；正弦干扰；预测控制；状态观测器；最优控制；前馈反馈控制
中图法分类号： TP 13 文章编号：
1001-1862(2003)05-733-07
Design of State
Predictive Observers and Feedforward and
Feedback Predictive Controllers for TimeDelay Systems with Sinusoidal
Disturbances
Tang Gongyou1 Jia Xiaobo1 Zhang
Xinrong2
(1 Department of
Computer Science, Ocean
266071，
2 Department of Mechanical and
Electrical Engineering , Shandong
Institute of Light Industry, Jinan 250100， China)
Abstract： Optimal predictive control to
damp oscillations for linear timedelay systems with
external sinusoidal disturbances is considered.A fullorder state predictive
observer for timedelay systems by using the control vector
and the predictive output vector of the controlled plant is structured. Based
on the state predictive observer, a feedforward and feedback
predictive
controller in an optimal control fashion is then designed. Frequency domain
analysis shows that
the timedelay term of the closedloop system can be transferred to the outside
of the system's closedloop framework by using the state predictive
observer. Therefore, the optimal control law may be designed according to the optimal
design methods for systems without timedelay. Time domain analysis shows
that this predictive controller is of stronger robustness to external
sinusoidal
disturbances, and is suboptimal with respect to quadratic
performance indexes.
Key words:
timedelay systems； sinusoidal disturbances； predictive
control； state observer； optimal control； feedforward
and feedback control
移动Agent结构化安全机制的研究
汪 治 郭忠文 孟庆春王 伟 陶 冶
(中国海洋大学计算机科学系，青岛
266071)
摘 要： 分析了移动Agent的安全问题和现有的Agent安全保护技术，从重构移动Agent的结构入手，提出了将Agent的安全机制从功能体中分离出来独立实现，从而构建1种新的移动Agent的结构化安全机制的方法，并对此进行了阐述。
关键词： 移动Agent； 安全； 结构化； 安全机制
中图法分类号： TP309
文章编号： 1001-1862(2003)05-74007
Research on a
Wang Zhi Guo Zhongwen Meng Qingchun Wang
Wei Tao Ye
(Department of Computer Science, Ocean
Abstract： In this
paper, a new method is presented and expounded
in which a security mechanism of Agent is separated
fr
om the
Agent's function body, and then a mobile Agent structured security
mechanism is
formed.
Key words： mobile Agent;
security; structured;
security mechanism
用1-3压电复合材料设计低旁瓣水声换能器
于新胜1 葛骑岐2
(1 中国海洋大学，青岛 266003；2 海鹰企业集团有限责任公司,无锡
2
14061)
摘 要： 报道采用13压电复合材料设计低旁瓣换能器的方法，可使单个换能器获得低于-25dB的旁瓣级从而显著优化波束。该方法以13压电复合材料为换能材料，在设计过程中通过控制换能器的辐射面的形状来对换能器实现窗函数加权，达到控制波束的目的。本文举例阐述设计方法，所提供的实验数据证明了本方法的工程可行性，并与国外同类典型产品进行性能比较。
关键词： 13压电复合材料； 形状加权； 窗函数； 旁瓣
中图法分类号： U666.74
文章编号： 1001-1862(2003)
Design of Low Minor
Lobe Underwater Sound Transducer wi
th 13
Piezocomposite Materials
Yu Xinsheng1 Ge
Qiqi2
(1 Ocean University of China, Qingdao
266003, China； 2 Haiying Enterprise Group Co, Ltd.
Abstract： The design
of low minor lobe transducers with 1-3 piezocomposite
materials is described in this paper. The beam pattern of the transducer can be
optimized, the minor lobe level being under -25dB. The design is based on the
use of 13 piezocomposite materials, and the beam pattern of the transducer can
be controlled by controlling the shape of the transducer's radiation are through
weighting. The method is expatiated
with a practical example, and the measured data provided
proves the feasibility of the method in engineering. And the performance of the
transducer is compared with that of transducers of the same type made
abroad.
Key words: 13
piezocomposite materials; weighted by
shape; aperture; minor lobe
RS-485总线理论的应用与分析
程 凯 孙克怡 曹 伟 金广奇
（中国海洋大学物理系，青岛266003）
摘 要：
本文简要介绍了RS485理论，对在实际应用中的RS-485网络配置、总线匹配、传输距离、抗干扰措施等做了详细的说明。给出了1个实际的应用系统，阐述了组网时应注意的几个问题。
关键词： RS485；总线；
网络配置； 传输距离； 波特率
中图法分类号： TN919.1 文章编号：
1001-1862(2003)05-753-06
The Theory and
Application Analysis of RS-485
Cheng Kai Sun Keyi Cao Wei Jin
Guangqi
(Physics Department,
Abstract： The paper
presents a brief account of the theory of RS-485 and
particularizes the network configuration, bus matching, transmission
distance and the methods of antijamming in its application. It details
several problems
in forming networks and provides an application system.
Key words： RS485;
bus; configuration of networks; transmission
distance; baud rate
利用EMD方法和小波变换进行信号奇异性检测
赵犁丰 张晓亮 宋 洁
（中国海洋大学电子工程系，青岛 266071）
摘 要： 本文采用经验模式分解(EMD)与小波变换相结合的方法分析非平稳机械故障信号的奇异性，进行机械故障诊断。与直接对原信号进行小波分析相比较，该方法提取的奇异性特征明显。数值模拟和对故障轴承的振动信号分析表明了该方法的有效性。
关键词：
经验模式分解；小波变换；奇异性；机械故障诊断
中图法分类号： TN911.7 文章编号：
1001-1862(2003)05-759-05
Application of EMD
and Wavelet Transform to the Detection of Signal
Singularity
Zhao Lifeng Zhang Xiaoliang Song
Jie
(Department of Electronic
Engineering,
Abstract: In this
paper the EMD (empirical mode decomposition) method
and wavelet transform method are used in combination to detect the singularity of nonstationary signals
from a faulty machine. Based on the detected
singularity the fault can be diagnosed. The singularity character
extracted by using this
method is clearer than by using the wavelet transform method
alon
e. The numerical
simulation and the analysis of the vibration signal from the bearing trouble
show that this method is effective.
Key words: empirical mode decomposition
(EMD)； wavelet transform； singularity； machine fault diagnosis