能算的

The basic approach of protecting people from being hurt or killed in an accident is to improve crashworthiness of vehicles. This paper starts with discussing theories and methods for vehicle passive safety design, which included experiential methods, analytic methods, multi-body dynamics methods, crash test methods and the finite element method. Emphasis will be paid to the basic FEM theories and algorithms of impact problems. Topics discussed include the governing equation, element discretization, hourglass control, time integration, material model, shell element algorithms and contact-impact algorithms. For more reliable simulation results, this paper then conducts study on how to accurately get material model parameters by combining the FEM method with experimental method, and develops relevant material test machine and parameter calculating software. Based on that, basic typical impact simulation and test validation study are conducted. On the basis of the above work, the paper studies the thin-shell structures'crashworthiness, which was affected by the following factors: spot-weld features, shell thickness, cross-section and pre-deformation. As to vehicle parts'crashworthiness, the paper conducts simulation study of designing energy-absorbing steering system and adaptive airbag system. A practical energy-absorbing steering wheel is designed as an example. In further depth research, the paper suggests several inverse quantificational methods for vehicle crashworthiness design based on the ideal crash characteristics. The above theories and methods are applied with good results through several practical vehicles' crashworthiness design and improvement.

文中对汽车碰撞安全性的设计理论和方法进行了归类和总结，其中包括经验法、解析法、多刚体动力学法、试验法以及有限元方法等；重点介绍了碰撞有限元法的基本理论和有关算法，涉及到有限元求解控制方程、单元离散、沙漏模态控制、时间积分、材料模型和应力修正、薄壳单元算法以及接触碰撞界面算法等，探讨了有限元计算中的材料模型参数获取技术，开发了相应的材料试验装置及材料模型参数反求软件，在此基础上进行了基本的碰撞仿真算例和试验对比研究；文中通过应用有限元方法研究了薄壁构件的碰撞吸能特性，指出了设计薄壁吸能构件时需要考虑的几个主要影响因素，即焊点、壁厚、横截面和预变形等；在关于车辆部件的碰撞安全性能设计中进行了吸能转向机构和自适应安全气囊的仿真研究，提出了吸能转向机构和自适应安全气囊的仿真研究方法；文中最后探讨了整车碰撞性能的设计与改进方法，提出了以理想碰撞特性为目标，采用分段加速度或者根据碰撞时间进行设计的反推设计法、部件吸能仿真优化设计法等量化设计方法，并通过综合应用文中所讨论的相关技术进行了整车碰撞性能的设计与改进实例研究，所选定的车型是大众化的普通轿车和碰撞安全性基础较差的微型面包车，研究结果表明，本文所提出的设计与改进方法是适用而有效的，具有重要的工程实用意义和价值。

When this girl picks out the Dauphin among his courtiers, it will not be a miracle for me, because I shall know how it has been done, and my faith will not be increased

如果这个姑娘在满朝文武当中认出了太子，那对我来说不算奇迹，因为我能看出到底是怎么回事，我的信仰并不能因此而有所增加。

In this paper, based on an optimum difference operator for spatial differential given by Holberg, an optimum difference method of modeling crosswell elastic wavefield is put forward, which adopts the staggered-grid technique and calculates the wavefield at different grid points. When the half length of optimum difference operator is taken as four to six points, the required number of grid points per wavelength equals to three, crosshole elastic wavefield numerical modeling can attain satisfied accuracy.

本文以Holberg提出的一种空间微分的最佳差分算子为基础，采用交错网格技术，提出了一种模拟井间弹性波场的最佳差分法，该方法能在大空间网格点上得到精确的波场值，当最佳差分算子的半长度取4～6个点，每个波长只采3个样点时，井间弹性波场的模拟就可以得到满意的精度，其计算速度比常规有限差分法至少快一个数量级。

He says with patience and determination this can happen. He says he can think of no stronger spue spur for action than the treats threats facing the world economy.

只要有耐心和决心就能解决。L也说他能想象比起世界经济正在面临的威胁来说不算什么刺激。

Certainly have not suffered loss, Li is a former British Hong Kong government is one of Li Ka-shing is indeed business Wizards, in the case of real estate are constantly rising had considered restructuring and the transfer of assets, has bought some foreign quality assets, telecommunications companies such as Germany orange shares, the New Jersey ports, the Panama Canal shares, and Hong Kong Cyberport aggressively into the building, will tentacles stretching the transformation and upgrading of telecommunications, Li Ka-shing is the only person in his fox, and many people are of the view that is Li and the former British Hong Kong government to give them weaving a better future, a beautiful dream, and Tung took office play his body more healthy, more destructive power of the strong characteristics of this beautiful dream hit a smash, this is one is caught, the onlookers-to the real estate collapse of the responsibility of all to Mr Tung who is totally unjustified, Although Mr Tung to the mainland, Beijing has followed some acts are in the eyes of some people, but to objectively evaluate, Dong is a honest kind of person, he is inadvertently let Tianzao point that the arrival and the day is certainly coming, the night time, the more devastating losses, Originally, the intention is that Mr Tung real estate prices trend eased, and then the case now almost Shanghai, prices every quarter on a 20% increase, almost all Hong Kong people have been crazy, and just opened a new development, the stage has long been ranked team to effectively alleviate this situation, the new SAR government changed in the past starvation effect of land supply policy, a substantial increase in the level of land supply in order to stabilize high land prices, while the Yuen Long, New Territories into the new City of mass construction, the expansion of public housing, housing construction plan (equivalent to our low-cost housing, economic applicable housing), if no major accident These measures should ensure that real estate to landing, but nobody thought that 98 years of financial turmoil, Hong Kong dollar devaluation Suoluosiming gambling, but the call foul silent do real estate, stock market doing transactions, the use diversionary tactics tactical let him return home with a full load, although the SAR government have been successfully defend the Hong Kong dollar does not depreciate, but the housing market and stock market watch.

当然也有没受损失的，李嘉诚算一个，前港英政府也算一个，李嘉诚不愧是商界奇才，在房地产不断攀高的情况下就已经考虑资产的转型和转移了，先后购买了一些外国的优质资产，如德国橙电信公司的股份、新泽西的港口、巴拿马运河的股份，并大张旗鼓地投入香港数码港的建设，将触角伸进香港电信的升级改造，李嘉诚做人方面堪称是只老狐狸，很多香港人都认为，是李嘉诚和前港英政府给他们编织一个美好的前程、一个美丽的梦，而小董上台后发挥他那身体越健壮、破坏力越强的特点，将这一美丽的梦击个粉碎，这正可谓是当局者迷、旁观者清，将香港房地产崩溃的责任全部归咎于董建华身上，是完全没有道理的，虽然董建华在靠近大陆、追随北京方面有些行为在港人眼里是过了一些，但客观地评价，董是一个老实厚道的人，他只不过是无意中让那一天早一点到来，而那一天是肯定会到来的，时间越晚，损失越惨重，本来董建华的初衷是希望房地产上涨的趋势有所缓解，当时香港的情形与现在的上海差不多，房价每隔一个季度就上涨20%以上，几乎所有的港人都为之疯狂，新楼盘刚开张，台前早已排起长长的队伍，为有效地缓解这一局面，新上任的特区政府一改以往饥渴效应的土地供应政策，大幅度地增加一级土地的供应，以平抑高昂的地价，同时宣布元朗、新界等新城区进入大规模建设，扩大政府公屋、居屋营建计划（相当于我们的廉租房、经济适用住房），如果没有大的意外，这些措施应该能保证房地产的缓着陆，但谁也没想到，98年的金融风暴，索罗斯明赌港币贬值、暗里却大做不动产、股市空头交易，这一声东击西的战术让他满载而归，虽然特区政府成功地实现了捍卫港币不贬值的目标，但香港的房市、股市从那一刻起，一败涂地。

Is a college without truancy a college?

学生逃课也不能是乱发火的理由，如果大学都不能逃课，那还算大学吗？

Moreover in carrier phase difference localization application, this paper introduces the basic principles of both the integer least square method and the LAMBDA method for resolving the integer ambiguity solution. Through a short baseline example and compared with the unlimited least square method, the results show that, LAMBDA method considers the ambiguity's integer characteristic and also decorrelates ambiguity's covariance, so it meliorates the covariance field of ambiguity, avoid the covariance's discontinuity.

另外在载波相位差分定位的应用中则详细讨论研究了整周模糊度解算中的基于整数最小二乘法及其降相关平差方法解算原理，通过一个短基线的实例计算分析其定位效果表明：较于未加限制的最小二乘搜索算法，LAMBDA方法能使相应的定位精度明显提高，具有较高的应用价值。

It utilizes an efficient and effective operator of competition by free energy component to simulate the principle of minimum free energy.

它使用了一种快速而有效的自由能分量竞争算子来模拟自由能减少定律。

We neglected the Noah principle: predicting rain doesn 抰 count, building arks does.

我们忘了诺亚的叮咛：能预测什幺时候下大雨没有用，必须要能建造方舟才算。

The second part is the controllability of parabolic equation .We study on the controllability of parabolic systems with a nonlinear term involving the state and the gradient ,the null-controllability property of a 1-d parabolic equation involving a fractional power of the Laplace operator ,null controllability of some systems of two parabolic equations with one control force ,and exact controllability of the parabolic system with bilinear control .

第二部分写的是，抛物方程的能控性，我们研究了含有状态和梯度的非线性的项抛物系统的能控性，含有拉普拉斯算子的分数阶的1-d抛物方程的零能控性，带有一个强控制的两个抛物方程的一些系统的零能控性和具有双线性控制抛物系统的精确能控性。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。