污染环境中 Smith 模型的渐近性

研究了污染环境中毒素压力影响下的单种群Ｓｍｉｔｈ模型，得到了种群－毒素动力系统是局部和全局渐近稳定的结果；证明了当环境中毒素周期性扰动时，系统周期解的存在性     

茂兰喀斯特山地南方铁杉种群结构和动态初探

基于大小结构分析法、矩阵模型和分布格局距离方法，研究了茂兰喀斯特山地南方铁杉种群的结构和动态特征：①该种群为中衰型种群；②其空间分布格局表现为聚块内个体呈剧烈聚集分布，而聚块个体呈均匀分布；③南方铁杉种群密度（ＤＳ）有随种群个体径级（ＤＧ）增大而增加的趋势：ＤＳ＝０．００３５ＤＧ１．７３２９；④南方铁杉为先锋种群，能于山顶特殊生境中与其它物种一起于一定时期内形成稳定群落，但其终将为阔叶树种取代；⑤在某种程度上，种群的空间分布格局距离法和矩阵模型能够较好地应用于中亚热带森林种群研究．     

13速格子Boltzmann方法的热流体力学方程

采用１３速六方格子Ｂｏｌｔｚｍａｎｎ方法研究热流体力学，碰撞项采用单驰豫时间的格子ＢＧＫ模型，局域平衡分布展开到Ｕ＾３项，最后以速度的二阶恢复Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程，三阶恢复热传导方程。     

纯滞后系统的Smith-Fuzzy预估控制

介绍了Ｓｍｉｔｈ预估器存在的问题，采用模糊控制与Ｓｍｉｔｈ预估器相结合的控制策略．仿真结果表明，Ｓｍｉｔｈ－Ｆｕｚｙ预估控制器具有较好的控制效果和鲁棒性     

裂褶多糖的结构研究

从裂褶菌Ｓｃｈｉｚｏｌｈｙｌｌｉｍ ｃｏｍｍｕｎｅ Ｆｒ．菌株的菌丝体，提取水溶多糖、醇析，Ｓｅｖａｇ法脱蛋白，透析，再径Ｓｅｐｈａｄｅｘ Ａ－５０，Ｓｅｐｈａｄｅｘ Ｇ－２００柱层析纯化，得裂褶多糖Ｓｐｇ（１），用酸水解，部分酸水解，酶解，ＰＣ、ＴＬＣ、ＧＣ、ＩＲ、Ｈ－ＮＭＲ、ＮａＩＯ４氧化，Ｓｍｉｔｈ降解等分析，证是Ｓｐｇ是一种β－葡聚糖，主链β（１→３）连接，支链β（１→６）接连，分子量１０     

AGC－AFC综合系统解耦控制

分析了板材轧制控制过程，给出了板厚板形综合系统（ＡＧＣ－ＡＦＣ）反馈闭环控制的数学模型；对ＡＧＣ－ＡＦＣ系统进行了解耦；引进Ｓｍｉｔｈ预估器补偿系统延迟环节的影响；最后采用ＰＩＤ方法实现对ＡＧＣ—ＡＦＣ系统的控制。仿真实验结果显示了上述方法的有效性。     

大气飘尘中硝基多环芳烃（NO2—PAH）的分析方法

研究大气飘尘中硝基多环芳烃（ＮＯ２－ＰＡＨ）的分析方法,在毛细管气相色谱－ＥＣＤ（ＧＣ－ＥＣＤ）上比较了冷柱头进样（Ｏｎ－Ｃｏｌｕｍｎ）和不分流进样（Ｓｐｌｉｔｌｅｓｓ）两种方法对ＮＯ２－ＰＡＨ可能产生热降解的影响．用ＧＣ－ＭＳ化学电离负离子方法在线加入含氟试剂Ｎ（Ｃ４Ｆ９）３,使ＮＯ２－ＰＡＨ衍生化或生成稳态负离子,从而大大提高其分析的灵敏度．     

表面活性剂具有SOD样活性吗?

用脉冲辐解法研究表面活性剂ＣＴＡＢ,ＳＤＢＳ,Ｔｗｅｅｎ８０胶束体系中Ｏ＾－２的自歧化反应速率,并与模拟物Ｃｕ（Ｇｌｙ－Ｇｌｙ）２和天然ＳＯＤ体系进行了比较,发现表面活性剂本身并无ＳＯＤ样活性,对前人研究得到的表面活性剂具有ＳＯＤ样活性的结论提出了质疑,并给予了一定的解释。     

NH_n,NH_m~+,NH_n~-(n=1,2,3;m=1,2,3,4)体系Gaussian-n和CBS-n方法物理化学性质的理论研究(一)NH,NH~+,NH~-体系

利用系统的理论方法研究ＮＨ，ＮＨ＋，ＮＨ－体系的物理化学性质：解离能，电子亲合势，离化能，质子亲合势，原子化能．这些方法有Ｇａｕｓｓｉａｎ－ｎ：Ｇ１，Ｇ２，Ｇ２（ＭＰ２）以及ＣＢＳ－ｎ：ＣＢＳ－４，ＣＢＳ－ｑ，ＣＢＳ－Ｑ，ＣＢＳ－ＡＰＮＯ．对所得结果及其误差进行比较和分析．     

科尔沁沙地三种蒿属固沙植物的种群空间分布格局分析

采用2m×2m和5m×5m两种样方划分方法,调查研究了科尔沁沙地西部三种固沙植物差不嘎蒿(Artemisia halodendron)、乌丹蒿(A.wudanica)和白沙蒿(A.sphaerocephala)在迎风与背风条件下不同沙地类型的种群空间分布格局,结果表明:(1)半固定沙地的差不嘎蒿种群分布格局为集群分布,但随着沙地固定,草本植物增加,差不嘎蒿优势度明显下降,死亡率增加,到固定沙地阶段,2m×2m划分条件下变为随机分布;(2)生长在流动沙地和半固定沙地的乌丹蒿种群,在两种样方划分条件下,分布格局均为集群分布,但在半固定沙地的种群聚集度比流动沙地更高;(3)对白沙蒿种群而言,两种方法结果一致,半固定沙地的为集群分布格局,但固定沙地的白沙蒿群落仍为单优群落,且由于环境均一,种群的分布格局为均匀分布.     

内蒙古半干旱区山地地衣区系的研究

首次系统地报道了内蒙古半干旱区山地的地衣区系名录，对野外采集所得到的１０００余号标本进行了分类鉴定及地衣化学的初步分析，研究表明：本区共有地衣７４种，隶属３目，６亚目，１８科，３２属，其中有２４种地衣为内蒙古分布新记录，同时记述了每个种的生境和分布，对于已知有经济价值的种类也作了记载。     

贵州盘县特区矮杨梅种群分布格局的研究

本文采用样条法及多种格局分析方法对贵州盘县特区矮杨梅种群及其大、小灌木群的分布格局进行了研究。结果表明，盘县特区矮杨梅种群个体数量分布格局主要由大灌木群格局决定，它与大灌木群均呈随机分布格局；而小灌木群则趋于集中分布，但分布强度较弱，并且集中分布面积较小。同时，本文还分析比较了几种样方方差分析法的优劣性     

锦鸡儿属（豆科）的系统

研究了世界８０种锦鸡儿属植物与分析了以往的系统〔１～４，６，１０，１１〕以后，提出了锦鸡儿属的自然系统．本系统共有１５组，１８系与９亚系，其中新的分类群有２组，５系，４亚系和２种；新组合有６组，３系，４亚系和２种．全部分类群都有拉丁描述，异名，指定模式和地理分布．以上的组、系与亚系表示了锦鸡儿属内的演化路线     

京津冀山地有刺灌木分布格局及其影响因子

根据京津冀山地460个样地调查的结果,对该地区有刺灌木的分布格局及影响因子进行分析。结果表明,有刺灌木在约60%的样地出现,主要为荆条灌丛样地,在少数样地甚至成为灌木层优势种。有刺灌木共24种,主要来自鼠李科、蔷薇科和豆科。恒有度最高的3种有刺灌木(酸枣、小叶鼠李和红花锦鸡儿)主要分布于海拔600 m以下的低山丘陵区较缓的阳坡和半阳坡。定量分析结果表明,光照和干旱是限制常见有刺灌木(尤其是酸枣)生长的重要因子。受气候、地形和群落因素的共同影响,有刺灌木在京津冀山地不同生境条件下均有分布。     

Spatial Heterogeneity of Vegetation in China

The spatial heterogeneity and ecological characteristics of 74 vegetation types and the lack of vegetation type within the 9.6 million km2 of Chinese territory were studied using data from the China vege- tation map. The analysis used 877 large quadrats 10 mm×10 mm (actual size 100 km×100 km), which cov- ered about 8.77 million km2. Each large-quadrat was divided into four small 5 mm×5 mm quadrats (actual size 50 km×50 km). The frequency of occurrence of all vegetation types was recorded in each small quadrat. The survey using the Shiyomi method of vegetation analysis based on the beta-binomial distribution was adopted to describe the frequency of occurrence and spatial heterogeneity for each kind of vegetation. The weighted average heterogeneity of all the vegetation types in the landscape provides a measure of the landscape level heterogeneity which describes the spatial intricacy of the existing vegetation composition. The maximum spatial vegetation heterogeneity was 0.8620 in the frigid-temperate coniferous forest of Larix (V1), which dominates cold moist northeast China. The minimum spatial heterogeneity with a low occurrence was the Caragana tibetica in the gravel desert in the western Yellow River Hetao area. The minimum occur- rence with a low spatial heterogeneity was the Monsoon rainforest on rock in Guangxi and Yunnan Provinces. The vegetation types on the Qing-Zang Plateau were found to be representative of Chinese vegeta- tion because of the very high occurrence and spatial heterogeneity of these vegetation types. The weighted average of the heterogeneity was 0.677, while the vegetation diversity index was 3.29.     

鄂尔多斯高原不同生境下中间锦鸡儿(Caragana.davazameii)叶片的游离脯氨酸、丙二醛含量以及POD活性的变化

通过对分布在鄂尔多斯高原不同生境的中间锦鸡儿叶片进行生理生化指标的测定,并选取具有明显生境差异的呼和浩特树木园移栽的中间锦鸡儿植株作为对比,探讨同一物种在不同生境下其体内游离脯氨酸、丙二醛含量(MDA)以及过氧化物酶(POD)活性的变化.结果表明:(1)生境差异明显的中间锦鸡儿生理调节方式也有明显差异,生境相近体内生理调节方式表现出趋同(2)野生中间锦鸡儿植株的POD活性均高于树木园移栽植株,进一步说明水分是影响中间锦鸡儿体内生理调节与代谢的主要生态因子.     

A measure for spatial heterogeneity of vegetation in the Center of Inner Mongolia

This study surveyed and analyzed the vegetation heterogeneity in the Center of Inner Mongolia (CIM) by a new method based on the beta-binomial distribution for each kind of vegetation. Of the 190 large quadrats of 5 mm × 5 mm (representing an area of 50 km × 50 km) (referred to as L-quadrats hereafter) were extracted from about an area of 475,000 km2. Each L-quadrat was divided into four small quadrats (S-quadrat) of 2.5 mm × 2.5 mm (equivalent to 25 km × 25 km) and the frequency of occurrence of each type of the vegetations was recorded in each small quadrate. The weighted average heterogeneity from all of the vegetations composing a landscape provides a measure at landscape level to determine the spatial intricateness of landscape composition. Our results indicated that each vegetation has its own distribution pattern; and the degree of heterogeneity is different from one kind of vegetation to the other. The results proved that the beta-binomial distribution can be very useful for analyzing vegetation landscapes.     

基于Google Earth高分影像的北海榄根村红海榄种群数量和分布的研究

本研究建立一种基于Google Earth高分影像的红海榄（Rhizophora stylosa）单株精准识别的方法,并利用这种方法开展红海榄的资源调查和生态研究。研究以广西北海铁山港东岸榄根村外围天然红树林中的红海榄种群为对象,利用高分辨率Google Earth影像精准识别红海榄的个体,进而获取种群数量、冠幅、高程等重要数据,并在影像上设置89个100 m×100 m的样方,运用聚集度指标法,分析红海榄种群的空间分布格局。结果表明：影像中可识别红海榄植株数量共有848株;在高程1-2 m滩涂有红海榄615株,占全部数量的72.5%,在适生滩涂高程下呈现一定的正态分布特征;冠层直径大小在1.00-1.99 m的红海榄494株,占全部数量的58.3%,研究范围内红海榄种群密度南向大于北向,向海方向大于向陆方向,斑块中心区域大于边缘区域;各聚集度指标测定结果显示,该天然红海榄种群呈聚集分布。以上结果说明,利用Google Earth高分影像可有效识别冠层直径1 m以上的红海榄单株;北海榄根村红海榄种群整体的空间分布格局呈聚集分布,并且红海榄幼树较多,推测随着时间的推移,研究区域的红海榄种群数量将会增多。     

Disentangling the effects of topography and space on the distributions of dominant species in a subtropical forest

Topography and space are two important factors determining plant species assemblages in forest communities. Quantification of the contribution of these two factors in determining species distribution helps us to evaluate their relative importance in determining species assemblages. This study aims to disentangle the effect of topography and space on the distributions of 14 dominant species in a subtropical mixed forest. Spearman correlation analysis and the torus- translation test were used to test the species-habitat associa- tions. Variation partitioning was used to quantify the relative contributions of topography and space at three sampling scales and three life stages. Correlation analyses and torus-transla- tion tests showed species abundance was mostly correlated with topographic wetness index, vertical distance from the channel network and convexity. Variation partitioning showed that pure topography, pure space and spatially struc- tured topography explained about 2.1%, 41.2 % and 13.8 % of the variation in species distributions, respectively. For nine species, total topography fractions peaked in 20 m quadrats. For ten species, the pure space fractions peaked in 50 m quadrats. For many species, the total topography fraction and the pure space fraction were larger for the most abundant life stages, which reflected the importance of sampling effect. However, some cases did not follow this trend suggesting that the effects of ecological processes such as habitat filtering, density dependence or dispersal limitation may exceed the sampling effects. In conclusion, we found that spatially structured topography and pure space primarily shaped the distribution of dominant tree species. Furthermore, their effects were both scale- and life stage-dependent.     

A measure for spatial heterogeneity of vegetation in the Center of Inner Mongolia

This study surveyed and analyzed the vegetation heterogeneity in the Center of Inner MoJagolia （CIM） by a new method based on the beta-binomial distribution for each kind of vegetation. As many as 190 large quadrats of 5mm×5mm （representing an area of 50 km x 50 km） （referred to as L-quadrats hereafter） were extracted from about an area of 475,000 km^2. Each L-quadrat was divided into four small quadrats （S-quadrat） of 2.5 mm×2.5 mm （equivalent to 25km×25kin） and the frequency of occurrence of each type of vegetation was recorded in each small quadrate. The weighted average heterogeneity from all of the vegetations composing a land-scape provides a measure at landscape level to determine the spatial intricateness of landscape composition. Our results indicated that each vegetation has its own distribution pattern and the degree of heterogeneity is different from one kind of vegetation to the other. The results proved that the beta-binomial distribution can be very useful for analyzing vegetation landscapes.