扩展

extended progressive refinement method as a fast algorithm of radiosity minimize the recomputation time after any virtual scene modification.in this paper,the extended progressive refinement method is studied and implemented in the way of opengl.then the data which can prove the efficiency of the algorithm by changing scene reflectivity and scene geometry during experiment is obtained.in this way,the method is proved to be efficient.

摘 要：当虚拟场景发生变化时，扩展的逐步求精算法作为一种快速的辐射度算法，大量减少了重新计算辐射度所花费的时间。对扩展的逐步求精算法进行研究，并利用opengl对算法进行了实现。通过在实验中对虚拟场景的表面反射率和几何属性进行改变，获得了一些证明算法有效性的数据，从而验证了该算法的有效性。

To prepare studying hierarchical intelligent control system of material flows in mineral processing plant further, picturing, transition rulers, analytic methods, relevance matrix and dynamic equation, defect in applying of Petri network, fall short of orient object models applying are discussed after technology of formalization model built, non-formalization built and compound model. And Petri network system with time attribute is expanded opening network system with interface of input and output. The network system expanded with all attributes of basic Petri network model has hierarchy and recursiveness, can be analyzed with mathematical tools of network system and can deal with concurrent and asynchronously also.

为了对选矿厂生产物流递阶智能控制系统的进一步研究奠定基础，本文在讨论了形式化建模技术、非形式化建模技术和复合模型的基础上，研究和分析了Petri网的图形表示、变迁规则、分析方法、关联矩阵与动态方程、Petri网模型应用中的缺陷、面向对象模型应用中的不足，并把采用赋时的Petri网系统扩展成为对外界有输入和输出接口的开放网系统，扩展后的Petri网具有递阶性和递归性，同时保持基本Petri网的所有性质，使模型仍可采用网系统数学工具进行分析，并可处理生产物流系统中的并发性和异步性。

In order toachieve scientific、reasonable and regular development of urban space, we must makeuse of the rational thought, synthetically analyze and study the influence factors of theurban land expansion, and then, we can come true the scientific choice of urban landexpansion and the right decision of urban planning.

为谋求城市空间科学、合理、有序的发展，我们必须运用理性思维，综合、系统、全面地分析和研究城市用地扩展的各项影响因素，以实现城市用地扩展的科学选择和城市规划的正确决策。

The results indicate that multisource fatigue core appear in the axe surface non-metallic inclusion distributing place by bending and retortion circle stress; The crack selevtivity expand to form the fatigue step along inclusion distributing route in the cut stress; The crack celerity expand to form the fatigue striation when puff part adequacy long in the positive stress.

结果表明：辊轴在弯曲、扭转循环应力作用下，表面非金属夹杂物分布位置出现多源疲劳核心；在切向应力作用下裂纹沿夹杂物分布路径选择性扩展构成疲劳台阶；当断面张开部分足够长时，在正向应力作用下发生快速扩展，微观形成疲劳辉纹。

There is something else that is reverberating on our planet that is directly linked to this island," says Monaghan."

上一季最后我们扩展了岛的轮廓，这一季我们将继续适当的扩展。

In design of system,we make the system have ability of development.there are 12 parts in the system.they are teaching,continue teaching,research,communion,research of teaching,clerk,teaching in network,schoolfellow,news,service for working,managing information,bbs.they are divided to three groups.teaching,continue teaching,research,communion,research of teaching,clerk,teaching in network,schoolfellow are fixed.the content of news and bbs can be changed and renovated.

其中教学、继续教育、科学研究、对外交流、教研室、教职员、网络教育、校友为固定扩展模块；新闻公告系统和教学BBS为交互扩展模块，我们可以用它随时进行新闻的发布、更新，实现教师和学生之间的交流与沟通功能。；网络办公服务平台、教学科研管理信息系统为管理信息模块，系部的一般事务、内部信息的发布都可以在这个模块进行处理。

The results make it known that: in the same cycle degree, the crack propagation depth of finite element is greater than experiments, the inaccuracy between expriments and computer simulation tracing is lower than 10%, the tracing conclusion is securer than the experimental one; both directions of crack propagation are not identical.

当接管区出现裂纹时，则在疲劳载荷的作用下会加速扩展，从而降低设备的使用寿命，并且可能发生一些毫无征兆的事故。因而研究并掌握接管区表面裂纹的疲劳扩展特性对于预防接管区的失效破坏具有一定的学术和工程价值。

The main components were a lateral expansion to the oblique popliteal ligament; a direct arm, which attached to the tibia; and an anterior arm. The oblique popliteal ligament, the largest posterior knee structure, formed a broad fascial sheath over the posterior aspect of the knee and measured 48.0 mm in length and 9.5 mm wide at its medial origin and 16.4 mm wide at its lateral attachment. It had two lateral attachments, one to the meniscofemoral portion of the posterolateral joint capsule and one to the tibia, along the lateral border of the posterior cruciate ligament facet. The semimembranosus also had a distal tibial expansion, which formed a posterior fascial layer over the popliteus muscle.

主要的部分是一个可以侧方扩展的腘斜韧带，最大的膝关节后方的组织结构，形成了一个较大的筋膜外皮位于膝关节的后方，测量结果显示长度为48mm，边缘宽度为9.5mm，侧方附件的宽度为16.4mm，它具有两个方面的附件，一个位于半月板股骨间部分的后外侧关节囊和一个在胫骨端的后叉韧带边缘，半膜肌同时也存在一个远处的胫骨扩展，形成了一个后方的筋膜附着腘肌。

This apparatus adopted the MCS-51 singlechip as the CPU, and the whole system was composed of the determined equipment, the basic system of the singlechip, photocurrent signal amplifier, AID switch, timer, LCD screen, expanded keyboard, expanded printer and RS232 serial communication.

该仪器采用MCS-51系列的单片机AT89C51作为CPU，系统由检测装置部分，单片机基本系统，光电流信号放大，A/D转换，时钟，液晶显示，键盘扩展，打印机扩展以及RS232串口通信等部分组成。

The extended transactions are executed by the LDBMS on the local database and the specially generated control tables. These extended transactions are responsible for the global serializability and recovery of transactions.

局部数据库管理系统在局部数据库和控制表之上执行扩展事务，这些扩展事务负责维护全局可串行性及事务的恢复。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失