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Precontract is a promise to make a forward contract, whose purpose is to make sure the forward contract be concluded, through a precontract made by the interested parties to bound the concerned person, as the condition of concluding forward contract be not ripe.

预约合同指当事人约定将来订立一定合同的合同，目的是在订立本合同的条件尚未成熟时，先订立预约使相对人受其约束，以确定本约的订立。

Recalling the achievements, we are pleased and looking forward to the future, we look forward to Sangma quality education in primary schools in stride forward wave.

回顾成绩，我们感到欣慰，展望未来，我们期盼桑麻小学在素质教育的浪潮中大步向前。

5S-160GP/9T-160 consists of a main case driven by 3-shaft fixed spindle and a rear mounted auxiliary case driven by planet gears. The main case has 5 forward speeds and 1 reverse speed. The auxiliary case has 2 speeds which double the speed of the main case, so that the transmission has 9 forward speeds, the 4 forward speeds of main case shift by ZF-BK short travel synchronizer, auxiliary case shift by lock ring synchronizer, crawler and reverse shift by join sleeve powered by the engine of 280-380 hp.

5S-160GP/9T-160型变速器由三轴传动的主变速器和后置的行星齿轮传动副变速器组成，主变速器有五个前进档和一个倒档，副变速器有两个档位，可将变速器的档位增加一倍，故变速器具有九前一倒档，主变速器4个前进档采用ZF-BK型短行程同步器换档，副变速器采用锁环式同步器换档，爬档和倒档采用接合套换档，用户可根据需要选装部分功率取力器N71 /1或N71/2， N70。

Results (1) The forward and reverse subtracted cDNA libraries of different metastastic potential large cell lung cancer cell lines were successfully constructed;(2) With blue-white colony and dot blot, 307 positive clones in the forward subtracted library and 78 positive clones in the reverse subtracted library were obtained;(3) 55 clones were successfully sequenced in the forward subtracted library. Homolog analysis confirmed 23 differential expression segments, which were similar to the human genes already known, including NME2, NPM1, MT 2A, HSPE1, TAFIA, EPRS, PX19 and EIF3S9 et al;(4) 31 clones were successfully sequenced in the reverse subtracted library. Homolog analysis confirmed 16 differentially expressed segments. 15 of them were similar to the human genes already known, including ANXA2, TUBB, PKN2, GNAS, EEF1A1, SSR2 and RPLPO et al. Only one segment had partial homology to known human genes. This segment was supposed to be the new EST segments which might not have been cloned.

结果(1)成功构建人大细胞肺癌高低转移株差异表达基因正向消减cDNA文库和反向消减cDNA文库；(2)经蓝白菌落筛选和斑点杂交，正向消减文库获得307个阳性克隆，反向消减文库获得78个阳性克隆；(3)正向消减文库挑选55个克隆成功测序，经同源性分析最终确定差异表达基因片段23个与已知人类全长基因具有很高相似性(95％～100％)，这些基因包括NME2、NPM1、MT2A、HSPE1、TAFlA、EPRS、PX19和EIF3S9等；(4)反向消减文库挑选31个克隆成功测序，经同源性检索和比对最终确定差异表达基因片段16个，其中15个与人类全长基因具有很高相似性(95％～100％)，包括ANXA2、TUBB、PKN2、GNAS、EEF1A1、SSR2和RPLPO等基因。1个片段和己知人类基因仅有部分相似性，表明它可能是未被克隆的人类基因EST片段。

The holistic design of the system and resolved the designs of software and hardware based on VXI bus are put forward according to the demand of test system. The hardware and software is designed, including the formation and design of hardware system, visual instrument software architecture, program design for instrument driver, high speed real-time data collection. In the dynamic test program, the idea of"software is instrument"was applied to meet the diverse test demands. Last, it is proposed that the VXI test system be developed to more totalization and networked. The basic theory of system identification was introduced briefly at first. The principle of spectrum analysis system identification based on Wiener-Hopf equation was expatiated. and the questions in applying Peusdo Random signal as spectrum analysis methods stimulate signal was studied, The generation principle of the peusdo random signal is researched, the characteristic of peusdo random are analyzed from time domain and frequency domain, the inverse repeat peusdo random signal is brought forward to make up the shortage of ordinary peusdo random signal. And a new chaos genetic algorithmis presented to solve the unprecise problem of the traditional method. In the servo valve dynamic characteristic test system, the spectrum analysis methods was applied successfully, the servo valve dynamic characteristic could be acquired rapidly and exactly, the test results were analyzed and the ameliorate methods were brought forward at last.

结合航天某集团液压测试中心测试系统的需求，提出了基于VXI总线的液压测试系统的整体设计方案，完成了测试系统的硬件设计与软件设计，包括硬件系统构成与设计、虚拟仪器软件结构、仪器驱动程序设计、高速同步实时数据采集等内容；以伺服阀动态特性测试为例设计了测试模块，该模块体现了VXI总线仪器软件开发所倡导的"虚拟仪器"的思想，以软件的灵活应用满足了不同的测试需求；结合自动测试系统的发展，研究了VXI测试系统与网络技术结合，实现各种软硬件资源共享，进一步提高设备及数据的利用率和系统的扩展性，使自动测试向综合化、网络化方向发展；研究了伪随机信号作为谱分析法辨识的激励信号时存在的问题，讨论了伪随机信号的产生机理，从频域和时域分析了伪随机信号的性质及其应用，提出了用逆重复伪随机信号弥补了普通伪随机信号的不足，并以混沌遗传算法对逆重复伪随机信号产生过程中的参数进行优化，可以更合理而不是凭经验产生需要的逆重复伪随机信号。

With the deepgoing of the market economy and the lifting of people's life quality, there are higher and higher demands of real estates. The value of real estates is not only for living but also for exchange. The system of commodity estate forward-sale has been established in China, but we didn't pay much attention to the legal issues of this system and the laws on this system are not enough in our legal system, for example, the character of the commodity estate forward-sale contract, the rights and obligations involved in the contract, the forenotice registration system ,the transfer of the forward-sale contract and ect.

今年来随着市场经济的深入化和人民生活水平的提高，人们对于住房有了越来越高的要求，而且房屋的价值也不再仅限于居住，其商用交换价值充分体现，商品房预售买卖制度在我国也已经逐步建立和巩固起来，但是对于商品房预售买卖中体现出了的一些主要的法律问题却并没有引起我们的注意或者在现实的法律体系中还有缺失，比如预售合同的法律性质，预售合同中合同双方权利和义务的关系，预告登记制度以及商品房预售转让等问题。

The new views of this thesis are as below:1,Advance the view of the special characters of the commodity estate forward-sale contract;2,Define the subject-matter of the forward-sale contract as a kind right of anticipation, embody the unfairness of rights and obligations;3,Discuss the essence of the forenotice registration system;4,Consider that the transfer of forward-sale contract should be allowed in our country.

本文的主要创新在于：1、通过对于商品房预售合同概念和性质的深入分析、研究和比较，显现出了该种合同与其他一般买卖合同的不同之处，并提出了一些笔者的观点。2、通过对于商品房预售合同标的物的分析将之定义为一种期待权并且提出了该种合同当事人权利和义务存在不平衡性的特点。3、笔者对预告登记进行了细致的分析，并在结合新颁布的《物权法》的基础上说明了该种制度存在的必要性以及我国现有制度的改进方向。4、提出了商品房预售转让可以存在并在一定条件下施行的观点，并提出了相关的理由。

The research of this thesis is under the circumstances that the international shipping center of Shanghai builds Yangshan deep water port project, first of all, through its SWOT analytical method analyze Shanghai maritime affairs situation, maritime affairs office existing boat policy, Yangshan deep water port hydrometeorological situation, analyze the present main ship type, to explain the background of the choice the ship the small waterline, to put forward the necessity of building small water-plane area twin hull maritime affairs patrol ships. Then, it introduces the principle, characteristic of the small waterline, and has analyzed the domestic and international state of development of the SWATH ship, and conclude that it is feasible to build SWATH maritime affairs patrol ship technical, through the research and analyze of design at home and abroad,; Then it analyzed the application of the SWATH ship in maritime affairs manage both at home and abroad, put forward the preliminary scheme, and carry on research to the economic performance of technology of the scheme, through putting forward the preliminary model of plan of design to main yardstick and selecting type of host computer finally after relatively optimize, and confirm design specifications .

本文的研究是在上海国际航运中心建设核心工程洋山深水港的大前提下，首先，通过利用SWOT分析方法分析了上海海事局面临的形势，对上海海事局现有航政管理船舶现状进行分析，对洋山深水港海域的水文气象情况进行了调研，对当前主要船型进行分析，对选择小水线面船的背景加以阐述，提出建设小水线面双体海事巡逻船的必要性：接着，对小水线面船的原理、特点加以介绍，并对小水线面船国内外发展状况进行了分析，对国内设计建造小水线面双体海事巡逻船的技术可行性进行了研究分析，得出国内设计建造小水线面双体巡逻船在技术上是可行的；然后对国内外应用于海事管理等工作的小水线面船型进行分析，提出初步的方案，并对方案的技术经济性能进行研究，通过对主尺度和主机选型等进行比较优化后最终提出初步的设计方案模型，并确定设计任务书。

As a result, for feed-forward NN model this paper first proposes the concepts of"attractor"and"attraction region","fake attractor"and"fake attraction region", and norm of describing"attraction region". Further this paper presents a mathematics method of calculating feed-forward NN"attraction region", it solves the overelaborate job of checking NN fault-tolerance performance by testing all detecting samples, so to test fault-tolerance performance using theoretic characteristic norm is an important break. In accordance with feed-forward NN low fault-tolerance and difficult to satisfy practical application, according to practical application theory, this paper presents an actual method of enhancing NN fault-tolerance performance, builds the mechanism of reconstructing NN model based on combining NN and fuzzy process, reforms NN "fake attractor"and"fake attraction region"to enhance NN fault-tolerance performance greatly.

为此，本文首先给出了前馈NN模型的&吸引子&和&吸引域&，&伪吸引子&和&伪吸引域&的定义，以及描述吸引域的指标，在此基础上提出了一种计算前馈NN模型&吸引域&大小的数学计算方法，该方法提出解决了目前依靠对检测样本的测试工作来检验NN容错性的繁琐工作，而用具理论意义的性能指标来检验，这是一个重要的突破；针对前馈NN容错性较低以致难于满足实用的缺点，根据NN实用稳定性理论，提出了一种提高其容错性的实用方法，建立了基于NN与模糊处理相结合的NN模型重构机制，重构NN&伪吸引子&和&伪吸引域&来大大地提高NN的容错性。

In swap market, the innovated swap means are the multi-period forward established extending means, multi-period and multi-cost forward established extending means, multi-period forward option extending means, the recollectable extending means, the changeable principal extending means, the negotiated price extending means, the retail price extending means, the average price extending means, the elastic extending means, the price ceiling extending means.

在掉期市场上，商品生产者可采用多期远期启动掉期方式，多期多值远期启动掉期方式，多期远期期权掉期方式，可回收的掉期、本金可变式掉期、议价掉期、零息掉期、均价掉期、伸缩型掉期、价格上限掉期等方式。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。