可交换的

In terms of subshifts of finite type determined by an irreducible marrix, affine maps of compacted connected metric abelian group and continuous maps of tree, the two concepts of topologically ergodic map and topologically transitive map are identical.

指出对于由不可约方阵所决定的符号空间有限型子转移而言，或紧致交换群的仿射变换及树上连续自映射而言，拓扑遍历与拓扑可迁这两个概念是一致的。

Spent solutions were finally drained into a mixing trough forneutralization, and subsequently, calcium or barium hydroxide and flocculant were added. Precipitate producedsuch as calcium or barium sulfate, calcium fluoride were separated, and recovered water was obtained after pu-rified by ion-exchange column.

分析了铝合金生产工艺中各步骤的化学成分，根据分析结果将常温脱脂、碱蚀、出光、阳极氧化和封孔等不满足生产要求的溶液排放至混合槽内进行中和，再加入氢氧化钠和絮凝剂分离沉淀后，经离子交换柱，得到的回收水可返回生产槽重复使用。

When pH is 10, adsorption time is 30 min, dosage of bone char is 0.6 g/L, the original concentration of As in drinking water is 0.5 mg/L, As removal can reach 95.2%. The adsorption behavior is fitted both with Langmuir and Freundlich isotherm. The adsorption mechanism is supposed to be Ca—OH functional groups combined with anion. And there may occur the co-precipitation between calcium hydrogen arsenate and hydroxylapatite in the aqueous solution, and ions also exchange. The saturation adsorption capacity of As reaches 4.688 mg/g. Indexes of effluent are in good agreement with the WHO stringent drinking water standards (0.01 mg/L).

研究结果表明：在pH=10，吸附时间为30 min和骨炭加入量为0.6 g/L，饮用水砷初始质量浓度为0.5 mg/L时其砷去除率可达95.2%；骨炭吸附砷的行为同时符合Langmuir和Freundlich等温吸附模型；其吸附机理可能是Ca—OH官能团结合HASO4阴离子，并产生砷酸氢钙和羟基磷灰石的共沉淀，另外还存在离子交换作用；吸附柱的饱和吸附容量为4.688 mg/g；出水砷浓度符合世界卫生组织规定饮水砷标准(0.01 mg/L)。

in basic of a hypothesis, a emulation calculate mode about the steady available of the weapon equipment was formed. emulation calculate process was compiled by using matlab6.5 engineering calculate software. a front-alternating interface was made in virtue of visual basic6.0 program language, and the data transfers was realized by using dde of windows operating system.

在一定假设的基础上，建立了武器装备稳态可用度仿真计算模型，利用matlab6.5工程计算软件编制了仿真计算程序，借助visual basic6.0编程语言制作了前端交互界面，并通过windows操作系统特有的动态数据交换机制实现了数据的传输。

Protected mode allows for 16M of memory but is also capable of protecting the operating system and programs from accident and deliberate destruction by users, a feature that is absent in the single-user 8088/8086 Virtual memory is a way of fooling the microprocessor into thinking that it has access to an almost unlimited amount of memory by swapping data between disk storage and RAM.

在保护模式下系统可用16M的内存寻址并且可防止操作系统或程序被用户不经意或故意破坏。这个特征是单用户8088/8086所不具备的。所谓虚拟内存就是通过在磁盘存储器与RAM中交换数据将微处理器骗过，使之认为它有无限大的内存寻址空间。

This variation of the SOA message exchange pattern may also be used to locate specific services.

这SOA的消息交换模式的变化也可用于定位特定的服务。

Different from existing algorithms, the proposed algorithm distributed the multi-iterations in sequent cell times.

与现有算法不同的是，该算法针对可扩展网络交换调度结构的特点，为处于最高优先级的调度器安排了两次迭代。

The system adopts CPU board with fast processing elevator operational program, data signal exchange, and HMI screen, which can make sure reliable operation and high speed. It also has PHILIPS SJA1000T field CAN bus, 82C251 Bus interface and the latest serial storage technique to record data. The functions of external watchdog and control chip internal watchdog compose two-level procedure monitoring, so as to ensure the normal operation of the control program. Heavy-current switch power LM2576 ensures the stable system working power, which has low requirements for the power supply. High-speed optoelectronic isolator and internal frequency division technology can make NW3P08-41C (42C) CPU receive the input impulse up to 1-phase 100 KHZ*2 CHANEL or 2-phase 50KHZ*1 CHANEL 32bit.

系统采用原装中央处理板，具有快速的处理电梯运行程序、数据信号交换、显示屏人机界面；确保可靠运行电梯控制程序；且速度快，PHILIPS 公司 SJA1000T 现场 CAN 总线；以及 82C251BUS 接口，最新串行存贮技术记录数据；外部看门狗及控制芯片内部看门狗功能组成两级程序监视，确保控制程序正常运行；大电流开关电源 LM2576 确保系统工作电源稳定，且对供电电源要求低；高速光电隔离光藕及微机内部分频技术，使 NW3P08-41C(42C)中央处理板可接收高达 1 相 100KHZ*2通道或 2 相 50KHZ*1通道，32bit 的计数脉冲。

The results showed that there were significant differences in numbers of stolons, length of stolons, dry weight of genets, dry weight of stolons and dry weight of ramets of L. brachystachya in different plots with different altitudes (P.01). The numbers of stolons of L.

在一定时间内，克隆植物相互连接的克隆分株可生长在不同环境条件的斑块中，并彼此进行物质交换、实现克隆整合，从而最大可能地利用异质环境 [5]。

The FTIR and TEM results show that Ce3-sol free from NO3-, CO32- was prepared by ion exchange method without washing, then the CeO2 crystal of high purity was synthesized by oxidation with H2O2 and vacumm drying. The sample obtained had an average diameter of 3 nm and good dispersity.

FTIR、TEM分析表明，离子交换法无需对合成的Ce3溶胶进行洗涤即可去除NO3-、CO32-等阴离子杂质，并用H2O2将该溶胶氧化，经真空干燥可制得粒径分布均匀，平均晶粒尺寸约3 nm，高纯度的CeO2粉体。

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