可交换的

A computer host shell, consists of one side plate, backplate installed on this side plate, top and bottom plate respectively installed above and below this side plate and backplate, panel installed on this side plate and opposite with the backplate, and another side plate opposite to this side plate, in which, this side plate is used for installing the mainboard with different frameworks, this backplate includes: one frame, which has one of the first opening and one of the second opening for installing the power supply; one of the first piece, with several slots in parallel and several bar pieces arranged between adjacent slots; one of the second pieces, with a connector opening and several vents; the first piece and the second piece are installed at the second opening in parallel, and both may be removed and exchanged their positions to meet with the mainboard with different framework.

一种计算机主机机壳，包括一侧板、安装在该侧板上的背板、分别安装在该侧板和背板上下两侧的顶板与底板、安装在该侧板上且与背板间隔相对的面板，以及与该侧板相对的另一侧板，其中该侧板用于安装不同架构的主机板，该背板包括：一框架，该框架上设有用以安装电源供应器的一第一开口及一第二开口；一第一片体，其上设有若干并列的槽孔及设在相邻槽孔之间的若干栅片；一第二片体，其上设有一连接器开口及若干通风孔；第一片体和第二片体并列安装在框架的第二开口，且两者均可拆卸并交换两者在框架上的安装位置以适配不同架构的主机板。

Src l was an acidic cytolysin, which was reported forthe first time. The cDNA encoding the mature Src l was cloned into non-fusion expression vectorpBV220 and expressed successfully in E.coli DH5α in inclusion body. After washing anddenaturing-renaturing, the recombinant Src l protein was purified by Q Sepharose FastFlow ion exchange chromatograph and Phenyl Sepharose hydrophobic interactionchromatograph.

首先构建了Src I基因的非融合蛋白表达质粒pBV220-Src I，并成功地在原核细胞E.coli进行了重组表达，筛选出稳定表达的工程菌株DH5α，摸索了稳定表达的条件，摸索了包涵体的洗涤、变性和复性条件，摸索出了复性蛋白Src I的纯化工艺，纯化过程简单，经QSepharose Fast Flow阴离子交换层析和Phenyl Sepharose疏水层析两步纯化，就可获得了高纯度的重组蛋白样品(纯度达99％以上)，该纯化方法适合重组蛋白的大量纯化，为Src I的性质、结构和功能研究奠定了良好的基础。

As a private mobile communication system, The digital trunkingmobile communication system was boomed in 1990's, and before this, the appliedprivate mobile communication systems in market are almost the analog systemwith analog voice and digital signalling. And there are no data referring to thesystem design and parameters chosen. It includes the wireless channel accessalgorithm of the mobile terminals, single base station capacity in large regional networks, link designing schemes between the switching control center and basestation as well as the study of the service quality for the multiple traffic. Theseindispensable parameters in design a digital trunking communication system arestudied in this dissertation and some instructive achievements can be got. To provethe correction of the theoretical study, the result was tested with the popularsystem of pan-European digital trunking communication system.

数字集群移动通信系统是九十年代中、后期兴起的专用移动通信系统的一种新体制，在此之前国际、国内市场使用的都是数字信令、模拟话音集群移动通信系统其涉及领域是模拟体制，对数字集群的系统设计的有关参数、方法等的选用及其性能表现并无成熟的文献可供参考，如移动终端的无线信道接入算法、大区组网单基站系统的容量、基站和交换控制中心间的链路设计和多业务种类的服务质量等都是数字集群基站子系统进行设计和开发必须解决的关键技术。

The contents of the course include: what operating system are, what they do, how they are designed, and where they came from; a general history and explanations of computer system, and some discussion on hardware and the relation between operating system and other software; concept of process, process states and process control block, process queue, management of processes; concepts of sequent programming and parallel programming, process synchronization and its application, process communication; scheduling level and job state transition, job scheduling, process scheduling, and methods for scheduling; deadlock and its necessary conditions, deadlock prevention, control and recovery of deadlock; fixed partition, multiple partition and replacement partition memory management, swapping and overlays; page, segmentation and segmentation with paging storage management, basic concept of virtual memory management, and page, segmentation and segmentation with paging memory management.

课程的内容包括：计算机系统概述、操作系统的形成、发展、功能、特性、类型和发展趋势；操作系统的硬件环境、操作系统与其它系统软件的关系；进程的概念、进程的状态和进程控制块、进程队列、进程的管理；顺序程序设计和并行程序设计概念、进程间的同步与互斥、同步机构应用、进程间通信；调度的层次和作业状态转换，作业的调度、进程调度、调度算法；死锁问题的提出、死锁的必要条件、死锁的预防、避免、控制和恢复；固定分区、可复分区、多重分区内存管理技术以及覆盖技术和交换技术；分页域、分段域、段页域存储管理技术、虚拟存储管理的基本概念、分页域、分段域、段页域虚拟存储管理。

The invention discloses a dielectric hole-microhole composite material and synthesizing method in the inorganic porous material, adsorbing material and catalytic material technical domain, which comprises the following steps: adopting zeolite molecular sieve as raw material; reacting with sodium bisilicate solution under 30-60 deg.c for 10-300 min; disintegrating particle part of zeolite molecular sieve into piece with microhole structure; adding cetyl trimethyl ammonium bromide as molder; adjusting pH value of mother liquid to 10-12; aging 1-8h; adding in the high-pressure autoclave to do water heat synthesizing reaction at 80-130 deg.c for 24-72h; separating solid; washing; drying; sintering under 500-600 deg.c for 5-10h; obtaining the Si-Al porous material with dielectric hole and microhole composite structure.

本发明属于无机多孔材料、吸附材料和催化材料技术领域，涉及具有介孔-微孔复合材料及其合成方法。其特征是以沸石分子筛为原料，用偏硅酸钠的水溶液在30～60℃反应10～300分钟，使沸石分子筛的颗粒部分解离形成具有微孔结构的碎片，加入模板剂十六烷基三甲基溴化铵，然后调节母液pH值为10～12，老化1～8小时，然后加入高压釜于80～130℃进行水热合成反应。反应24～72小时后，分离出固体，水洗、干燥，然后于500～600℃焙烧5～10小时，得到具有介孔和微孔复合结构的硅铝多孔材料。本发明的效果和益处是所发明的合成方法可用于合成多种沸石结构和介孔结构的复合材料，所合成的材料经过质子交换可以具有较强的酸性，在吸附和催化领域具有广泛应用前景。

Low temperature ordering of FePt thin films has been achieved by using a thin equiatomic AuCu underlayer.

提出并利用相干生长的多层膜中有序－无序转变过程的彼此关联作用，借助AuCu缓冲层的低温有序化，降低FePt薄膜的有序转变温度200℃以上，为FePt薄膜的低温有序化开劈了一条新途径；制备多层膜，退火形成有序相FePt纳米颗粒分散在Ag基体的复合结构，比FePt/Ag共溅射或合金多层膜方法的退火温度明显降低；通过缓冲层Ta控制FePt的粗糙度和晶界密度，同时界面附近Ta、Pt发生化学反应，两者共同促进薄膜内Pt原子的有效迁移，从而加速FePt有序化；进一步，在Ta和FePt之间插入Bi薄层，强化Ta、Pt的扩散，在更低温度下形成高矫顽力的有序化FePt薄膜且FePt晶粒之间交换作用大大减弱；发现MgO薄膜作底层，可控制与MgO晶粒尺寸大致相当的临界厚度以下的FePt有序化薄膜的（001）取向，同时，MgO和FePt的相对厚度显著影响（001）取向FePt的有序化。

The next year I did better still, for I spaded up all the land which I required, about a third of an acre, and I learned from the experience of both years, not being in the least awed by many celebrated works on husbandry, Arthur Young (10) among the rest, that if one would live simply and eat only the crop which he raised, and raise no more than he ate, and not exchange it for an insufficient quantity of more luxurious and expensive things, he would need to cultivate only a few rods of ground, and that it would be cheaper to spade up that than to use oxen to plow it, and to select a fresh spot from time to time than to manure the old, and he could do all his necessary farm work as it were with his left hand at odd hours in the summer; and thus he would not be tied to an ox, or horse, or cow, or pig, as at present.

第二年，我就干得更好了，因为我把总需要量的全部土地统统种上了，只不过一英亩的三分之一，从这两年的经验中，我发现了我没有给那些农业巨著吓倒，包括亚瑟·扬的著作在内。我发现一个人如果要简单地生活，只吃他自己收获的粮食，而且并不耕种得超过他的需要，也不无餍足地交换更奢侈、更昂贵的物品，那末他只要耕几平方杆的地就够了：用铲子比用牛耕又便宜得多；每次可更换一块新地，以免给旧地不断地施肥，而一切农场上的必要劳动，只要他夏天有空闲的时候略略做一做就够了；这样他就不会像日前的人们那样去和一头牛，或马，或母牛，或猪猡，捆绑在一起。

Available in a wide range of firmness levels, it is simple to build a mattress that caters to an individuals needs; his and her sided beds are easy to construct; toppers can fine tune the feel to fit anybody's preference, and can easily be exchanged to ensure you feel as comfortable as possible when it matters most.

可提供范围广泛的坚定性水平，这是简单的建立一个床垫，满足了个人的需要；他和她的片面床很容易构造； toppers可以微调的感觉适合任何人的喜好，并可以方便地进行交换，以确保您觉得的尽可能舒适，最重要的当。

In the paper, the polymerization of fluoroalkyl acrylate and fluoroolefins in supercritical carbon dioxide are reviewed in detail,including homopolymerization and copolymerization of fluoroalkyl acrylate, synthesis of melt-processable tetrafluoroethylene polymers, ion-exchange resins and polyvinylidene fluoride et.al.

本文详细地介绍了近年来以超临界二氧化碳为介质的氟烷基丙烯酸酯类单体和氟烯烃类单体的聚合反应研究，其中涉及氟烷基丙烯酸酯类单体的均聚和共聚，可熔融加工的四氟乙烯聚合物，离子交换树脂，偏氟乙烯的均聚和共聚合等。

Through network, network learning high schooler the learning partner for option more , and have more favourable condition, learning can select own learning content first , seeks the learning who is studying same content , after opposite side agrees knot for learning partner, will meet in which one side problem , is mutual and convenient to be able to discuss mutually, never same angle exchange the view with a problem, help and remind mutually, until problem solves.

网络学习中学生可供选择的学习伙伴更多了，而且具有更多的有利条件，学习者可以先选择自己的学习内容，并通过网络查找正在学习同一内容的学习者，经对方同意结为学习伙伴，当其中一方遇到问题时，双方便可以互相讨论，从不同角度交换同一问题的看法，互相帮助和提醒，直到问题解决。

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