多重

RFID has the feature against reproduction, combined encryption, and securer data on ticket, document, certificate, and items, for the purpose of anti-counterfeiting.

RFID具有不可复制，多重加密，数据更加安全的特点，用于票据、证件、物品上，达到防伪目的。

However, it is difficult to prepare homogeneous mixture for diesel fuel because of its low volatility, high viscosity and low resistance to self-ignition.

在能源、环境和资源的多重压力下，低温燃烧成为研究焦点。

Semantic Grid is able basically to solve the problems, such as different information format in Grid, multiformity of information semanteme , pinch of information relation and non-unionize. It has higher practicability.

语义网格基本上能解决网格上存在的信息格式异构、信息语义的多重性以及信息关系匮乏和非统一等问题，具有高度的简单实用性。

The traditional query tree optimization methods,parallel database optimization methods based on left linear trees and right linear trees,bushy trees,and operation of the forest,have their own pros and cons,they have been more in-depth and maturity of the study.The query optimization method based on multiple weighted tree has studied its model of parallel query plan,its complexity model of parallel query plan and query optimization algorithms.The semantic query method transforms an inquiry into one or several semantic equivalence inquiries then has to find and implement a strategy to achieve a better query.Agent-based parallel database query optimization using Multi-Agent technology to automatically search the integrity constraint conditions which are related to the determined query,there for,the efficiency between several relations' joins has been greatly improved.The parallel optimization algorithm,based on genetic algorithm which is suitable for multi-joins of cluster environment,has deeply studied the relations storage options,multi-joins query optimization and query processing and other key technologies based on cluster parallel database.

传统的查询树优化方法，即基于左线性树、右线性树、浓密树、操作森林的并行数据库查询优化方法，各有优劣，对其的研究比较深入、成熟；基于多重加权树的查询优化方法，研究了其并行查询计划模型、并行查询计划的复杂性模型和查询优化算法；语义查询优化方法将一个查询变换成一个或数个语义等价的查询，进而寻找并执行这些等价查询中具有较好实现策略的一个；基于Agent的并行数据库查询优化采用Multi-Agent技术自动查找与给定查询有关的完整性约束条件，使得多个关系间连接操作的效率得到很大的提高；基于遗传算法的并行优化算法，深入研究了基于机群并行数据库中关系存储的选择、多连接查询优化和查询处理等关键技术。

Objective To design and establish a new method to dectect patho-genic bacterial 16S rRNA gene in cerebrospinal fluid using mutiplex semi nested PCR.

目的 建立多重半套式聚合酶链反应（multiplex semi-nested PCR）快速检测脑脊液标本中常见病原菌的方法。

The educational technology has the very intense practical orientation, but because this practical orientation is too powerful, it causes the researchers of educational technology can be unable to stop to think some basic theory questions, and be far away from asking educational technology some ultimate questions about educational technology. So it has caused that afer semicentennial developing educational technology still exit some questions such as confusing, the reality helpless, deficient theory, although it has obtained many encouraging performance, but it is unsuitable that educational technology is the commanding point of education reform and the breach status. Facing these conditions, educational technology needs carry on reviewing and looking up in historical and reality multiple field, needs integrate and conclude for obtained studying results, needs reflect on own level, and need to have the big breakthrough in the discipline elementary theory construction.

教育技术具有非常强的实践价值取向，但这种实践取向的过于强大往往使得教育技术的研究者们无法停下来思考本领域一些基本的理论问题，因此直接导致了教育技术学在经历了半个多世纪的学科建设历程之后，尽管取得了诸多可喜的成绩，但是依旧存在理论与实践研究的诸多问题，这对于面临新技术的发展和世界范围的教育改革浪潮而给予的教育技术作为教育改革的制高点和突破口的地位是极不相称的，教育技术学迫切需要在历史与现实的多重视野中进行回顾与前瞻，对已经获得研究成果进行综合和归纳，需要对学科自身进行深层次反思。

We carry out control and guarantee for 21 main factors from the purchase of the raw material, semifinished product, training of the staff and to the final product, to set position, duty for the quality control and warranty.

高度重视产品质量，坚持"进优质原料，出优质产品"的方针，并引进国际先进的生产技术和生产设备，建立了技术检测中心，对原材料进行精心挑选，产品出厂前，须经过多重严格的质量检测，确保了产品质量。

Both the spherical and semispherical microlenses have a function of imaging. The result shows that semi-spherical has better imaging effect.

通过2种微透镜的显像对比证实，半球微透镜阵列比整球微透镜阵列具有更为清晰的多重显像效果。

This paper discusses the organizing principle of knowledge library in expert system and suggest that the Sequential File, Index File, Multichain File, Backcomposing File, Hash File, etc can be adopted to organize knowledge library and the corresponding program is designed in the Prolog Language.

论述了专家系统中知识库的组织原则，对在计算机上如何实现知识库的物理组织问题，提出可以采用顺序文件、索引文件、多重链接表文件、倒排文件及散列文件等方法来组织知识库。

We have proposed an efficient multisignature scheme based on Shamir's IBS scheme.

我们已提出了一种有效的多重计划，基于Shamir的IBS的计划。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。