Prediction of the Economic Development for the Circumjacent Reservoir Region of the Longtan Hydropower Project Using Grey Quantitative Analog

In order to overcome some technical difficulties,we adopt ingenously the grey models combined with the quantitative analog method,and select the Dan Jiangkou Project which has accumulated practical operation data for a long time as the analog project to predict the economic influence for the circumjacent reservoir region of the Longtan hydropower project.On the basis of analog we have built various industrial economic grey models,and compare them with the corresponding predictions for the unconstructed reservoir case.The predictions of the former are greatly larger than the later ones.and hence provides a certain scientific basis for the central leaders to make a decision for constructing the huge hydropower project ultimateiy.     

直墙拱形巷道围岩应力场分析

为得出直墙拱形巷道围岩应力分布规律,应用复变函数弹性理论推导了直墙拱形巷道围岩应力分布的解析表达式。对直墙拱形巷道边界的围岩应力和巷道水平线方向的围岩应力分布规律进行分析,并考虑直墙拱形巷道断面高宽比和侧压系数对其影响规律。研究表明：在不同巷道断面高宽比、侧压系数下,直墙拱形巷道围岩应力集中区域主要集中在直墙底部底角处、拱形顶板中点附近和底板中部3个位置。不同巷道断面高宽比下,直墙拱形巷道沿水平线的应力分布规律基本相同。侧压系数大于1时,采用巷道断面高宽比小于1较有利于巷道稳定;侧压系数小于等于1时,采用巷道断面高宽比大于1较有利于巷道稳定。     

A Research on the Way of EMBET in the Tracking Systems'' Accuracy-analysis During Satellite Launch

In the past, the criterion for calibration has almost invariably been the stellar oriented ballistic camera,the method is a point to point comparison on the identical coordinate system. Deficiencies is follows: The request of weather is severe(cloudless night); The period is often long; the measure equipment of high precision can't be calibrated. While EMBET methods is used in calibration, it does not need criterion and it demands only that the measure elements is larger than 3,and the trajectory and many system errors of the measure elements can be simultaneously calculated with the measure data sequences. The error models of related equipments' measure elements and the EMBET of typical equipment group are given. The EMBET method is successfully used in Accuracy-analysis of Satellite Launch.     

Study on Dynamical Characteristic of Epicyclic Gear Drive with Internal Tooth

The epicyclic gear drive with internal tooth is analysed,a dynamic analysis model which is based on the compatibility conditions of deformation is set up.On the basis of this model,the analysis of dynamics and kinematics is made,and the influence of design parameters on dynamical characteristic is also studied.     

兰花选育种研究进展

兰科植物为单子叶植物中最大的一个科。全国各地极其重视资源的调查、收集与驯化及其外来品种的引进；已有17个种的兰花种子成功运用超低温技术贮存；染色体分析技术及分子标记成为资源评价的重要手段，应用于研究兰科植物的亲缘关系及其遗传多样性这两方面的研究报道较多。兰花育种以传统的人工杂交为主，通过人工杂交已获得大量种间、属间杂交种；多倍体育种方法及生物技术作为辅助手段应用于兰花育种，获得了多倍体植株及转基因植株。     

酶制剂在农业中的应用及生物技术改良

酶是由多种氨基酸、维生素及矿物质等构成的活性蛋白质,广泛地存在于自然界。酶制剂工业是生物工程的重要组成部分,其应用非常广泛。主要从畜禽养殖、水产养殖、农药残留降解、生物农药、作为抗生素替代品和农业食品加工以及生物技术在该领域应用进行简短的综述。     

猕猴桃溃疡病生防芽孢杆菌B2的鉴定及应用

猕猴桃溃疡病是一种毁灭性细菌病害,该病发展迅速,防治难度大,严重制约了猕猴桃产业的发展。为找到一种有效防治该病的方法,针对化学防治易产生抗药性、污染环境、杀伤天敌等特点,从猕猴桃根际土壤中分离共获得25株芽孢杆菌,采用点菌法筛选出4株对猕猴桃溃疡病菌(Pseudomonas syringae pv.actinidiae)具有拮抗效果的菌株(抑菌圈直径达到5 mm以上),其中B2拮抗作用最强。根据菌落(体)形态特征、生理生化鉴定以及16S r DNA序列分析,初步鉴定B2为蜡样芽孢杆菌(Bacillus cereus)。将B2的发酵原液稀释成1×109cfu/m L的发酵液,并在此基础上依次配制50、100、500、1000、2000倍的稀释液,用于盆栽试验。盆栽试验采用喷雾法,30天后的防治效果分别达到了90.45%、86.52%、80.90%、67.98%、47.19%、15.73%,60天后尽管病斑有少量增加,旧病斑有所增大,但与对照相比,病斑增长速度明显减缓。大田试验结果证明,该菌具有较好的生防潜力,喷雾法选择B2发酵液的50倍稀释液,涂抹法选择B2发酵液的100倍稀释液,可有效降低猕猴桃溃疡病的危害。     

水稻籽粒中内源多胺及其与籽粒充实和粒重的关系

以８个水稻品种（含杂交稻组合）为材料，研究了籽粒发育期内源多胺的含量及其与籽粒充实和粒重的关系。结果表明：籽粒中Ｐｕｔ（腐胺）、Ｓｐｄ（亚精胺）和Ｓｐｍ（精胺）的含量，强势粒高于弱势糕卫粒充实好的品种（组合）高于籽粒充实差的品种（组合），尤以Ｓｐｄ和Ｓｐｍ更明显；籽闰中Ｓｐｄ和Ｓｐｍ的含量或浓度，以及Ｓｐｄ／Ｐｕｔ和Ｓｐｍ／Ｐｕｔ的比值与谷粒充实率和千粒軎于极显著正相关在花后３天喷施外源多胺（１ｍ