中项

As an important technology on data authentication, digital signature can be used to identify the instance of denying, forgery, tamper and imitation in today's communication network. It can provide the data integrity, figure authentication, and also prevent from disavowal of a sender during data transmission.

在现代的数字通信网络中，数字签名作为数据认证技术中的一项关键技术，可以解决否认、伪造、篡改及冒充问题，用来保证信息传输过程中的完整性，提供信息发送者的身份认证和不可抵赖性。

This makes more and more people pay more attention to studies and applications of numerical simulation in thermal recovery. In this research, we have developed a reliable mathematical model for thermal recovery, which takes a full consideration of the effect of viscos, gravitical and capillary forces on the three-phase flow of gas, water and oil, the effect of the temperature on the medium characteristics of liquid and solid, the phase equilibrium of gas-liquid in each component, heat transportation including connection, conduction and radiation as well as heat losses in both the overburn and underlying strata. In the space discreation of the mathematical model, we have proposed a new method based on the improvement of the conventional nine-points difference approximation, which has a higher difference accurancy.

本项研究以热力采油的主要机理为基础，充分考虑在粘性力、重力和毛管力作用下油水气三相流动，考虑温度对各种流体和固体介质物性的影响，考虑每一组分中汽液两相的相平衡，考虑热在地层中的传导、对流和辐射以及上下盖层的热损失，利用热力学第一定律、质量守恒定律和流体迁移定律，建立了正确可靠的注蒸汽数学模型；在对数学模型进行空间离散时，利用控制有限体积积分法，对以往的九点差分近似作了合理的改进，使其具有较高的差分近似精度：结果表明，该公式的近似精度要比以往文献中所给的九点差分近似精度高，可以认为，在油藏数值模拟中，如果遇到非均质情况，使用这种九点差分近似更合理。

The use of "Start" menu "Run" to run programs or open documents, in the "running" in the run-off process and open the file path and name will be recorded and entered in the next "run" item, In the drop-down list box is displayed for selection, these records need to be removed.

使用"开始"菜单中的"运行"来运行程序或打开文件后，在"运行"中运行过的程序及所打开文件的路径与名称会被记录下来，并在下次进入"运行"项时，在下拉列表框中显示出来供选用，这些记录需要清除。

Ellipse registration is very difficult to implement in practical engineering as a kind of image registration.

椭圆配准作为图像配准中的一类，是目标识别研究中的一项关键技术，在工程实现中有很大的困难。

In this paper,author's research starts from the thermal expansivity and thermal transmission theory in physics,then utilizes the thermo elastic theory in mechanics of elastic bodies and the solution of statically indeterminate system in mechanics of materials as well as the interaction principle between soil and elastic body,finally gets the correct thermal stress analysis formulae of shaft-wall.

长期以来，在基岩段井壁结构的设计中，一直将地压作为结构设计的影响因素，实际上是不完善的；对于煤矿的进风井，井壁的温度随季节而变，因此，温度因素同样的应该考虑到井壁结构的设计中去；因此，将遗漏的因素补充入传统的设计理论中，是目前十分紧要的一项研究工作。

However there are some differences in the learning motivation in terms of different backgrounds:① The higher the academic degree holders, the lower the intensity of the learning motivation in self-development, social contact, family requirement and degree pursuing.② The students from town and villages show great motivation in Better Serving Society, however the students from cities pay more attention to the assessments from family and working company.③The intensity of the motivations in female students in pursuing knowledge, self-development and social contact are apparently stronger than male students.④With the increasing of age, the motivation intensity decreases in the aspects of self-development, career-development and competition or promotion. The students in the age of 40"s to 50"s pay more interests in educating children.⑤The motivation intensity in Better Serving Society, Avoid Failure in The Work and Better Educating Children decreases with the increasing of the income. Middle income class emphases more in promotion.⑥ The intensity of motivation in pursuing knowledge is very strong in state-worker and free-lancer. Teachers pay more attention to career development and the free-lancer emphasis in developing enterprises and self-expressing.

在对比分析中，成人学员因学历、来源地、性别、年龄、收入、职业的不同，其学习动机存在一定的差异：①随着学历层次的升高，成人学员在发展、交往、家庭、文凭动机的多个子项上表现出差异，动机强度依次降低；②县乡学员在"更好地服务社会"项目中比城市学员表现强烈，而城市学员更重视家庭及单位对自己的看法与评价；③女性学员在求知、职业、交往三大类上的动机水平较明显高于男性学员；④在发展、职业、竞争或提升三个方面，随着年龄的增加，其动机强度呈递减趋势，而41－50岁的学员在"为了更好地教育子女"这一项上表现尤为突出；⑤在"更好的服务社会"、"避免工作失败"、"更好的教育子女"三个项目中，随着收入的增加，其强度水平依次减弱，中间收入的学员较其它两层次更在意"得到提升"；⑥不同职业的学员有不同的动机表现，公务员与自由职业者的求知动机表现强烈，教师的职业动机水平相对偏高，自由职业者强调"发展事业"与"表现自己"。

We also include the distributions of surface tension,gravitational acceleration,and viscosity to the whole flowing procedure in dynamicfluid equations.

数值例子中，我们不仅捕捉到了分界面在运动过程中的拓扑改变，如从多连通变为单连通，再分裂为多连通等，分界面的扭曲、合并、形成射流等大变形，还在流体力学方程组中添加了反映分界面性质的表面张力、重力、粘性项。

The problem of Lagrange interpolation of polynomial space in space Rs is studied,and the construction of Lagrange interpolation polynomial in space R1 and space R2 is proposed.

研究空间Rs 中多项式空间中的Lagrange插值问题。给出了R1和R2上Lagrange插值多项式的构造，同时，给出了R2上插值问题的几个例子。另外，给出了矩形网点上的Lagrange插值多项式和三角形网点上的Lagrange插值多项式。讨论了Rs空间中的Lagrange插值多项式及其余项

Other major figures in statistics: John Graunt (introduced the concept of inference from a sample to an underlying population and described life expectancy); Karl Friedrich Gauss (developed modern statistical reasoning); the 18th-century English theologian Thomas Bayes (showed how probability can be used in inductive reasoning); Sir Ronald Fisher (the principle of randomization as a method for avoiding bias in studies); and Jerzy Neyman (the theories of estimation and testing).

其他统计学上的重要人物：John Graunt（从一项潜在的人口数和描述预期寿命的样本中引进了推论的概念）；Karl Friedrich Gauss；18世纪英国神学者Thomas Bayes（示范了如何将概率应用到归纳推论中）；Sir Ronald Fisher（随机化原则，一种避免研究中的偏移的方法）；还有Jerzy Neyman

Our country firstly put forward such design principle of Qinghai-Tibet railway engineering as "lower temperature actively, reduce the heat into the subsoil, and assure the heat stability of frozen earth for the quality stability of construction", creatively adopt such corresponding measures of frozen earth construction problem as: for the poor frozen earth developing section, line should avoid as possible;for the geology of ice at high temperature and unstable frozen earth zone, the method of bridge instead of subgrade shall be adopted;in subgradeconstruction, such facilities as heat stick, rubble ventilation subgrade , rubble ventilation berm, ventilation pipe subgrade and laying heat preservation board etc shall be adopted to raise the stability of frozen earth subgrade;during the excavation of bridge, culvert , foundation pit and scouring prevention trough, creatively adopt single-tooth knapper and solve the problem of frozen earth excavation;during the construction of bridge and culvert, durable concrete and three-step maintenance method are adopted to assure the outside and inside beauty of structure.

我国在世界上首次提出"主动降温、减少传入地基土的热量、保证多年冻土的热稳定性，从而保证修筑在上面的工程质量的稳定性"的青藏铁路工程设计原则，创造性地采取了解决冻土施工难题的相应对策：对于不良冻土现象发育地段、线路尽量绕避；对于高温极不稳定冻土区的高含冰量地质，采取"以桥代路"的办法；在路基施工中采用了热棒、片石通风路基、片石通风护道、通风管路基、铺设保温板等多项设施，提高冻土路基的稳定性；在桥涵基坑、挡水埝基槽开挖中，创造性地应用了单齿破碎器，解决了冻土开挖难题；在桥涵工程施工中，采用了耐久性混凝土，采用了三步养生法，保证了结构物内实外美。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。