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To keep certain number of greater patches through protection and restoration in urban area is meaningful;(2) small greenland patches with diverse structure may promote the heterogeneity of urban landscape, and serve as colonial land and stepping stones for certain populations, and create rich types of habitats and ecological niches. So laying small patches in urban environment is also important. Incorporation of the coarse grain and fine grain, aggregation and outliner of landscape elements may creates better landscape patterns;(3) many literatures have showed that good landscape connectivity benefits the longer persistence of species and the conservation of biodiversity.

大的绿地斑块有多种作用,通过城市地区自然景观斑块的保护或城市绿地的建设,在城市中维持一定的较大规模的绿地斑块是有积极意义的;(2)结构不同的小的绿地斑块可增加城市的景观异质性,为生物提供迁徙地、扩散暂歇地,创造丰富的生境资源和生态位,因此,结合大的绿地斑块的建设,同时布置小的绿地斑块作为补充,粗粒、细粒结合,集聚、分散结合是形成优良绿地景观格局的途径;(3)诸多的文献已显示,好的景观连接性有利于物种持续较长的时间,从而有利于生物多样性的保护。

And indicates that assuring the insurance must possess five elements: firstly, existent of insurable risk; secondly, congregation and disgregation of many homogeneous risks; thirdly, rating of insurance premium rate; fourthly, setting up insurance capital; fifthly, making the insurance contract.

指出保险的确立必须具备五个要素:一是可保风险的存在;二是大量同质风险的集合与分散;三是保险费率的厘定;四是保险基金的建立;五是保险合同的订立。

Low temperature ordering of FePt thin films has been achieved by using a thin equiatomic AuCu underlayer.

提出并利用相干生长的多层膜中有序-无序转变过程的彼此关联作用,借助AuCu缓冲层的低温有序化,降低FePt薄膜的有序转变温度200℃以上,为FePt薄膜的低温有序化开劈了一条新途径;制备多层膜,退火形成有序相FePt纳米颗粒分散在Ag基体的复合结构,比FePt/Ag共溅射或合金多层膜方法的退火温度明显降低;通过缓冲层Ta控制FePt的粗糙度和晶界密度,同时界面附近Ta、Pt发生化学反应,两者共同促进薄膜内Pt原子的有效迁移,从而加速FePt有序化;进一步,在Ta和FePt之间插入Bi薄层,强化Ta、Pt的扩散,在更低温度下形成高矫顽力的有序化FePt薄膜且FePt晶粒之间交换作用大大减弱;发现MgO薄膜作底层,可控制与MgO晶粒尺寸大致相当的临界厚度以下的FePt有序化薄膜的(001)取向,同时,MgO和FePt的相对厚度显著影响(001)取向FePt的有序化。

No entire nitrendipine crystals were observed visually in SEM photos. The results of X-ray diffraction and differential scanning calorimetry analysis indicated that the crystalline form of nitrendipine was highly dispersed in microspheres, so as amorphous state. The drug release rate of microspheres could be controlled with adjusting the ratio of solid dispersion carriers and retarding agents formulated. The agitation speed and temperature of the preparation process have distinct effect on micromeritic properties of microspheres. The release profiles of the microspheres were mainly affected by the stirring rate of paddle, the concentration of SDS and pH of dissolution medium. Cooling speed and time, however, have no evident influence on the drug release rate of the microspheres. The dissolution data showed that the mechanism of drug release from microsphers was mainly diffusion-controlled. The incorporation efficiencies of 3 batches sample were exceed 96. 8%, which implied that the current method was suitable for design sustained-release dosage form for poorly water-soluble drug.

在扫描电子显微镜下观察,在微球内外未发现尼群地平的完整结晶,X-射线粉末衍射和差示扫描量热试验结果也显示,尼群地平已经被高度分散在微球中;微球的释药速度可通过调整处方中固体分散体载体和阻滞剂的比例控制;制备温度和搅拌速度对微球的质量影响较大;溶出仪的搅拌速度,释放介质的浓度和pH对微球的释放有较大的影响;制备过程中的冷却速度和冷却时间对微球的释放行为影响不很明显;方程拟合的结果表明缓释微球的释药行为符合扩散机制;测定三批微球样品的包封率均在96.8%以上,表明该法适合于制备难溶性药物的缓释微球。

In hydrological modelling one of the most common and significant challenges faced is the reduction of uncertainty in estimation and calibration of model parameters,especially how to estimate parameter values for ungauged basins and simulate the hydrological effects of basin development scenarios and water usage practices.

目前应用较为广泛的模型多为集总式模型。但是,集总式水文模型有很多缺点,如不能反映实际暴雨洪水产汇流的空间分布特性,无法全面的刻画水文系统分散输入集中输出的产汇流规律等。因此为了研究和解决变化环境中的水文水资源问题,评估和检测流域的径流过程和水资源量的动态变化规律,实现水资源的可持续利用和发展战略,必须开发研制有物理基础的分布式流域水文模型。

The experiment results showed that, the MnO_2 particles scattered uniformally after milled for 6h, the average diameter was 300nm, which loaded on the surface of fiber in flat successfully. The removal efficiencies to HCHO of MnO_2 milled for 6h was up to 94.07% after 72h, the removal efficiencies increased with the content of MnO_2 loaded, its increased after treated with DMF, or so was 7%.

实验结果表明,研磨6h的MnO_2粉末分散均匀,平均粒径可达300nm,以平铺的形式均匀地负载于纤维上,效果比较理想;随着吸附时间的延长,研磨6h的MnO_2粉末反应72h对甲醛的去除率达94.07%;活性炭/腈氯纶负载MnO_2纤维对甲醛的去除率比未负载的明显提高;随着纳米MnO_2负载量的增大,甲醛的去除率变大,用DMF处理后的纤维对甲醛的去除率有所提高,大约提高7%。

Results showed that the action between SiO2 particles was strong when the dispersion concentration was high; the network structure formed by PVA and coatings'' components had low strength; the network structure formed by mordant and coatings'' components was unreversible and strong; the thickener could perform as disperser and weaken the coatings'' structure, and the lubricant could improve the flow of the coatings in the micro structure.

结果表明,SiO2分散液浓度高时,SiO2粒子间的作用增强;PVA与涂料组分形成的网络结构强度比较差;固色剂与涂料组分形成不可逆、强度高的网络结构;辅助胶黏剂具有分散剂的作用,可在一定程度上弱化涂料结构的强度;润滑剂能够提高涂料的流动性能。

Based on the typical case study and positive analysis on Broccoli Cooperative Organization in Lin- hai,Zhejiang province,this paper find that cooperative organizations under capital control in the devel- oped area present the phenomena of function feebleness,and with the characteristic of"property right locking",farmers in the cooperative organization are still dispersedly resisting the nature and market risks,and meanwhile benefit apperceiving of farmers is not obvious,thus they are likely to choose to exi...

本文通过对浙江临海西兰花合作社的典型案例和实证分析发现,经济发达地区资本控制下的合作社呈现出明显的功能弱化现象,并同时伴随着合作社&产权锁定&特征,合作社农户仍然分散地抗御着自然风险和市场风险,同时农户对加入合作社后的利益感知程度不高而可能选择退出,信息、资本及技术的可获得性和销售的稳定性都将强烈冲击合作社的存在边界、规模和稳定性。

In the first, the thesis classes the information that could be shared in supply chain, stock information, demand information, sell forecast information, produce/deliver plan information and others. Then describes the flow of information in supply chain, establishes the decentralized, centralized and colligated control model of information flow. Through the analysis of indetermination, information asymmetry, bull-effect and the balance of collision target in supply chain, explains the value of information in supply chain.

论文首先对供应链中的可共享信息做出了界定,包括库存信息、需求信息、销售预测信息、生产/配送计划信息以及其它信息等;分析了供应链中的信息流,建构了信息流的分散控制、集中控制及综合协调控制三种控制模式;并通过对供应链中的不确定性与信息不对称,&牛鞭效应&的形成与产生原因以及供应链冲突目标的协调分析,说明了供应链中的信息价值。

In order to investigate the physical mechanical and shrinkage properties of rubber concrete,and to invent a effective method to improve the strength of rubber concrete,this paper researched the influence of rubber crumb proportion on concrete strength,and the shrinkages of different rubber concretes were compared by employing regular concrete testing methods.

为了探讨橡胶集料混凝土的物理力学及收缩性能,寻求改善橡胶集料混凝土强度的方法,采用常规的普通混凝土物理性能实验方法研究了橡胶掺量对混凝土强度的影响,比较了不同橡胶集料混凝土的收缩情况,考察了可再分散胶粉对混凝土性能的影响。

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推荐网络例句

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0,0.4,0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗,测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础,研究二值图像的形态分析算法,探讨最小结构元素的两种基本形态:膨胀和腐蚀;分析了数学形态学复杂算法的基本原理,把数学形态学的部分并行处理理念引入到家实际应用中。

Have a good policy environment, real estate, secondary and tertiary markets can develop more rapidly and improved.

有一个良好的政策环境,房地产,二级和三级市场的发展更加迅速改善。