查询词典 DMA

Introduce some methods to realize high-speed buffer memory.

介绍了几种实现高速缓存的方法，以及利用 Intel8237制作一个 DMA 控制器，详细介绍了 DMA 传输的原理和条件，解决了 DMA 控制器和外部接口电路的设计问题，并且给出了 DMA 控制器的初始化程序。

The results indicate that there are strong dipole or ionic pairs interactions between carboxylic acid or anhydride and dimethylamino groups in reactive blends, so reactive compatibilizers are formed at the interphase, which can reduce the interfacial tension and improve interfacial adhesion between the component polymers, meanwhile the morphologies of the reactive blends become more fine and uniform, the dispersed domain size decreases remarkable.

研究结果表明：在PS/PE-g-MAH/St-Co-DMA和PS/EPDM-g-DMA/St-Co-MAH反应性共混体系中，反应性聚合物所含的酸酐基团与叔胺基团存在离子对间的相互作用；在PS/Surlyn/St-Co-DMA和PS/EPDM/Surlyn/St-Co-DMA反应性共混体系中，反应性聚合物所含的羧酸基团与叔胺基团间存在偶极相互作用。

As emphases, the key-tech, such as Cache, memory management, interrupt, DMA, bus driving, method of I/O interface of the microcomputer is introduced to the students, so that they can catch the key points and the application methods of the microcomputer.

以微型计算机的关键技术如Cache、存储管理、中断、DMA、总线驱动、与外设的接口方法等为重点，使学生掌握微型计算机关键技术的要点和应用方法。

The experimental goal is to use SOPC-NIOSII EDA / SOPC system platform for real-time moving object detection system in this paper. After the inputs of image penetrated the CMOS Sensor to receive the data of the image makes the RGB form the transformation. The CPU processes operation of image detects. After the processed of image deliveres to VGA displayed output of real-time image. We use example programs of DE2 platfrom to achieve entire hardware on experiment board of SOPC-NIOSII EDA / SOPC System platform. On system of dectect image we divided into two parts : hardware and software. We use Verrilog of HDL to modify code in hardware. To use Custom IP of SOPC Builder produced IP of our need. We need a interface to connect in the COMS Sensor to FPGA and FPGA to VGA among. The code synthesize to create a programming file of *.S by Quartus II. Then, to use USB BLASTER of SOPC-NIOSII EDA/SOPC System platform programmed on FPGA. We use NIOS II IDE to assign DMA address in sofaware. We use SOPC-NIOSII EDA / SOPC System platform of Hum-Heng Technology co.

中文摘要本论文实验目标是在於利用SOPC-NIOSII EDA/SOPC系统平台来实现即时移动物体侦测的系统，影像输入透过CMOS Sensor接收影像的资料经过RGB格式的转换，再经过处理器处理影像侦测的运算，最后再将处里后的影像资料传送给VGA做即时的影像输出，我们使用DE2平台的测试范例程式转换在SOPC-NIOSII EDA/SOPC系统平台实验板来实现整个的硬体，我们将影像侦测系统分为硬体和软体二部份，硬体部分我们使用Verilog硬体描述语言修改撰写，利用SOPC Builder的自订IP产生我们所需的IP ，在COMS Sensor到FPGA跟FPGA到VGA中间我们需要一个interface来进行连接，经由Quartus II来合成产生*。sof的烧入档，然后利用SOPC-NIOSII EDA/SOPC系统平台专用的USB BLASTER来烧入到FPGA上，软体部分我们使用NIOSII IDE来定址我们DMA位址，主板我们采用华亨科技公司的SOPC-NIOSII EDA/SOPC系统平台。

To manufacture fiberglass life-saving, rescue, support boats and boat and matching frame, winch, and other life-saving equipment, with advanced hardware and software facilities and professionals, by the British LR, Japan JG, NK, USA ABS, USGC, Norway DMA, DNV, Republic of Korea KR, Germany GL, France and China BV of CCS and other marine authorities and classification societies recognized by

镇江金舟船舶救生设备有限公司以制造玻璃钢救生、救助、辅助艇及和相配套的艇架、绞车以及其他救生设备，拥有先进的软硬件设施及专业人才，获英国LR、日本JG、NK、美国ABS、USGC、挪威DMA、DNV、韩国KR、德国GL、法国BV的及中国CCS等海事局和船级社的认可

There are six technical characteristics in the system. lUsing the way alike differential input to increase the ability of anti-jamming. 2Combining multiple thread with DMA to ensure real time online monitor. 3Realizing high precision measurement of rotating speed by general purpose counter and timing in A/D card.4Using TCP/IP network protocol to realize high speed data transport between upper computer and lower computer.

该监测诊断系统具有六大主要技术特点： 1、利用准差动输入，提高现场抗干扰能力； 2、将基于Windows平台的多线程技术与DMA技术结合，保障在线系统采样的实时性与多任务性； 3、采用A/D卡自带定时/计数器对机组转速进行高精度测量，实现加窗转速跟踪快速分析； 4、利用TCP/IP协议实现上下位机网络数据高速传输； 5、采用传统振动测试与RS—485总线结合对多种测试信号进行混合采集。

Abstracts: To sample high speed random signals without drop, a design of O-shaped high speed random signals acquisition card based on the CPLD and its realization are presented. It consists of same three sets of acquisitive circuits, which construct O-shaped structure to sample the signals without drop .And it adopts threshold judging method to determine the valid data in the process of the acquisition, abandons vast of the redundant useless data at the same time, it only sends the useful data to the host computer by the way of DMA, so it is easy to processing the data. The design is concise and reliable. The sketch map of the logic circuit and the explanation of the main parts are presented. This design has been applied in the engineering project of sampling α nuclide.

为了对随机到来的信号进行不丢失的高速采集，提出了一种基于CPLD的随机信号环形高速采集卡的设计与实现；通过采用三套采集电路形成一个环形结构，可以对随机到来的信号进行不遗漏的高速采集，而且在采集过程中利用阈值的方法鉴别出有用信号，并舍弃了大量的冗余无用数据，从而只将有用数据以DMA的方式传于主机，便于进行信号的处理；电路设计简洁可靠，并给出了主要的逻辑电路示意图与主要部件说明；该系统已经应用在采集α核素的工程实践中。

The resultant cationized pulp fibers can obviously improve the retention of precipitated calcium carbonate filler in the furnish. Adding 2% of CPF （based on oven-dry pulp） can improve the retention of PCC from 61.1% to 83.4%, compared with the retention of PCC only 78.2% by adding 0.05% of CPAM, and also the application of CPF is better than adding EPI-DMA directly. At the same time, CPF can improve the drainage performance of the stock.

制得的CPF能显著提高沉淀碳酸钙填料的留着率，用量为2%的CPF即可使PCC的留着率从61.1%提高到83.4%，而CPAM在最佳添加量0.05%时仅使其留着率提高到78.2%，CPF应用性能优于直接添加EPI-DMA，同时CPF能够改善浆料的滤水性能。

Until memory stick dma code is reversed, it is impossible the implementation on psp phat.

直到DMA代码被编译之前，老版的机器是不会支持的。

This paper presents three IP cores in detail, which arecharacter LCD controller, Timer/Counter and DMA controller. All those tree IP cores interfacesare WISHBONE compilable.

本文完成了遵循WISHBONE总线标准的字符型LCD控制器、定时／计数器、DMA控制器3个IP软核的设计。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。