查询词典 nets

The data structure and its establishing method of information system for city service and drain pipe nets based on GIS are studied.

研究了城市给排水管网信息系统的数据结构及其建立方法，以及在微机上利用C语言进行城市给排水信息系统的设计，并实现了部分空间分析功能。

Main points of the thesis are as follows:(1) The main function models and information relations between these models in the CAPP system in the integrated CAD/CAM project are explained, a new process plan design method is mentioned based on analyses of process plan design. This method is based on the process plan prototype, and develops the prototype little by little until the perfect process plan is completed, the prospect of this method is discussed;(2) The feature abstracting rules and methods are studied, a feature coding system is developed based on GT, all the defined feature models are described by the mathematical methods;(3) The integrated method of CAD/CAPP based on features is mentioned, this method defines a feature exchanging model, and develops an interface software to exchange design data into technology data base, this technology data base includes the design and technology information of the parts;(4) The process plan reasoning method based on features is created, this method uses Mycin algorithm to solve the reasoning of the feature process plan. A process plan making system is developed. In this system part process plan is made by the semi-intelligent method, this method uses the feature reasoning, feature process chain searching and man-computer talking together;(5) The main structure of the HOPE system is introduced, a shaft drawing and its process plan made by this system are shown, the data process problem in process drawing making is also discussed;(6) A new method of describing process rule is introduced, this method uses IfThen rules and neural nets weight values together to describe process rules, the BP algorithm is adopted in this method;(7) The optimal machining sequence problem of the process steps on the same fixturing is discussed, optimal algorithms SA is applied to solve this problem, the result shows that this method is more efficient than the traditional method;(8) All jobs in the thesis are summarized. In order to carry out the research in the future, some rational proposals are given.

全文论述的内容主要有下列几个方面：(1)较为系统地阐述了CAD／CAM一体化工程项目中CAPP系统的主要功能模块及其信息流程，在分析工艺设计过程的基础上，提出了基于特征原型的渐进式工艺设计方法，并探讨了该方法的应用前景；(2)研究了零件特征提取的原则和方法，在成组技术的基础上，开发了一套基于特征的分类编码系统，并在提取零件特征的基础上，定义了零件特征的数据模型，开发了基于轴类零件特征的参数化设计系统；(3)研究了基于特征的CAD／CAPP集成的方法，通过定义零件特征数据模型的存储结构，开发了将设计数据转换到工艺数据库中的接口程序，为后续的CAPP系统提供必要的零件形状和工艺信息；(4)研究了基于特征的工艺推理方法，将Mycin算法应用到工艺决策中，开发了基于特征的工艺推理及工艺方案生成系统，在系统中综合运用特征推理、特征加工工艺链查询及人机对话相结合的半智能化方法确定零件加工工艺；(5)介绍了整个HOPE系统的总体结构，通过运行HOPE系统绘出了一轴类零件的零件图，并生成了该零件的加工工艺方案，初步探讨了基于特征的工序图生成技术中数据处理问题；(6)研究了工艺设计过程中知识如何有效表示的问题，提出了将显式的IF-THEN规则表示与隐式神经网络权值表示相结合的工艺知识表示方法，并利用BP算法进行了工艺知识表示的初步研究；(7)研究了工艺设计过程中同一安装下工步优化排序问题，利用神经网络中基于模拟退火的理论来解决该工步优化排序问题，实践证明该方法较传统的算法具有更高的效率；(8)总结了本文所进行的研究工作，为今后进一步开展工作提出了较为合理的建议。

There were no safety nets for failures,and children from such a background learnt earlythe value of self-presentation.

对失败者来说这个世界上早没有安乐窝，生活在这样的环境里的孩子早早地就知道了自我表现的重要性。

Villagers fishing in the sea find their nets are almost too heavy to pull up.

村民在海上垂钓，在找到自己的网几乎是太沉重，以拉动。

With water levels falling rapidly at the peak of the dry season, a giant school of bass, a tasty fish that fetches a good price at markets, was swimming right into the nets being cast from a dozen small canoes here.

随着干旱季节，最严重的时期的到来，河水迅速退去，成群的、美味的、可以在市场上卖个好价钱的鲈鱼，可以一起涌进，十几艘小独木舟所撒下的网中。

With water levels falling rapidly at the peak of the dry season, a giant school of bass, a tasty fish that fetches a good price at markets, was swimming right into the nets being cast from a dozen small canoes here.

旱季最缺水的时候，河面迅速下降，一大群鲈鱼正游进十几只小船上撒下的网里。鲈鱼味道鲜美，能在市场上买个好价钱。

The classic also saw Nets point guard Jason Kidd tie Wilt Chamberlain for third place with 78 career triple-doubles.

这场比赛的经典之处还在于我们可以看到网队的王牌控卫基德拿到他职业生涯第78次三双，从而追平了传奇巨星威尔特·张伯伦与之并列历史第三。

The popout also spoiled a Nets' celebration that saw Carter run off the bench and then hold his head in disbelief.

这次刷筐而出也破坏了网队的提前庆祝——当时卡特已经从板凳上跳起来，不过之后他难以置信却又无奈地低下了头。

A delay in the channels allowed us to see in the full light of day the narrow bar of luminous sand that separates the sea from the swamp, where there were fishing villages with their nets laid out to dry in the sun and thin, grim children playing soccer with balls made of rags.

在海峡中耽搁了一段时间，让我们得以在充足的阳光下看到狭窄的分开沼泽和大海的闪闪发亮的沙洲，上面的渔村晒着渔网，瘦小的脏兮兮的孩子在踢用碎布做的足球。

The construction of information safety that this paper nets for enterprise inside make a detailed discussion.

本文就企业内部网的信息安全的建设作一个详细的讨论。

" I' d like to get some rough idea about music in the baroque ear, please."

请简要介绍一下巴罗克时期的音乐，好吗？

The results showed that the peak latency and pattern of SEPs elicited by electrical needling in LI-l1 and MP were similar. The amplitude of SEPs elicited by electrical needling in LI-l1 was higher than that of MP. There was no obvious SEPs generation when MM was electrical needling.

结果显示，电针刺激曲池穴和其邻近桡侧伸腕长肌运动点诱发性脑电波的波形和波峰时间是类似的，只是穴位的诱发性脑电波波幅较大，而电针刺激非穴位点并没有明显的诱发性脑电位。