The first level is the traditional Discretionary Access Control (DAC).
第一级是传统的自主访问控制(Discretionary Access Control,DAC)。
These stub functions implement the standard Linux DAC policy.
这些桩函数实现标准Linuxdac策略。
DAC mechanisms determine what a program can do based only on the identity of the user running the program and ownership of objects like files.
dac机制只是根据运行程序的用户的身份和文件等对象的所有者来决定程序可以做什么。
The NSA found that most operating systems' security mechanisms, including Windows and most UNIX and Linux systems, only implement "discretionary access control" (DAC) mechanisms.
NSA发现大部分操作系统的安全机制，包括Windows和大部分UNIX和Linux系统，只实现了“选择性访问控制(discretionary access control)”(DAC)机制。
The analysis of the structure of adding current-steering to extend DAC-bits is presented, of which the main shortcoming is the decline of the static parameters.
分析了电流舵型数模转换器（DAC）通过增加一路电流以扩展位结构，其最大弊端是降低了原DAC的静态误差参数。
We illustrate the applications of laser-heated DAC technique to the research on the Earth's interior materials, and discuss key technical problems.
例举激光加温DAC技术在地球深部物质研究中的一些应用；并对一些关键的技术问题加以分析和讨论。
This time the signal generator and more software-based, is essentially a microprocessor on the DAC program control, you can get all kinds of simple wave.
这时期的信号发生器多以软件为主，实质是采用微处理器对DAC的程序控制，就可以得到各种简单的波形。
The operating characteristics and pin function of DC-DC converter MAX686 with DAC control are introduced in this paper.
介绍一种具有数模转换功能的DC -DC转换器MAX686的性能特点，给出了数控电源典型应用电路的参数设计过程。
In this paper, a method of designing a vibration simulator based on FPGA, ADC and high-speed DAC is discussed. Hardware block diagram and main FPGA design for this simulator are introduced.
介绍了一种基于FPGA、ADC和高速DAC的振动模拟器的设计方法，并给出了该模拟器的硬件原理框图和FPGA设计的核心模块。
The DAC 100 needs to be able to count up and down and consequently a reset condition should take it to a point near its mid-range.
DAC 100需要能够递加和递减计数，因此复位条件应当将其带到接近其中间范围的点。
This invention discloses a Delta-Sigma Digital to Analog Converter (DAC), comprising a Delta-Sigma modulator and a Finite Impulse Response (FIR) filter.
本发明揭露一种三角积分数模转换器，其包含三角积分调制器以及有限脉 冲响应滤波器。
The invention discloses a high-speed DAC synchronization method and a device to solve the problem of desynchrony of output signals in the prior high-speed DAC technology.
一种高速DAC的同步方法及装置，以解决在现有的高速DAC技术中存在输出信号不同 步的问题。
Using a reformative redundant stage, gain errors are measured by PR (pseudo-random) signal being injected at sub-DAC output and compensated in background according to the estimated value.
该方法应用改进冗余位结构，通过在其子dac输出端引入伪随机信号测量级间增益，并利用此估计值在后台进行增益误差补偿。
After compared some structures of DAC, the segmented architecture of current-steering DAC is adopted. The 5 MSBS are thermometer code weighed and the 3 LSBS are binary-weighted.
通过对DAC结构的比较，决定采用分段式电流舵结构，其中高5位采用温度计码，低3位采用二进制译码。
Inside the core there are three important models, such as digital-to-analog converter (DAC), voltage comparator and some other digital logic units.
内核部分又分为三个功能模块，如数摸转换器(DAC)，电压比较器和数字逻辑单元。
A video interface design based on XCV300FPGA is introduced. The implementations of video-in decoder and memory DAC video-out are discussed in detail.
介绍了一种以xcv300 FPGA为核心的视频接口设计。同时按照视频输入、解码存储、DAC转换输出视频流的流动顺序，给出了实现方法。
A method to design the value of coupling capacitor in coupled high-resolution charge-scaling DAC is presented.
介绍了耦合结构高分辨电荷按比例缩放DAC级间耦合电容值的设计方法，讨论了寄生电容对DAC精确度的影响。
A digital-to-analog converter (DAC) for converting a digital signal to an analog signal includes a first thermometer decoder and a second thermometer decoder.
一种用于将数字信号转换为模拟信号的数模转换器(DAC)，包括第一温度计解码器和第二温度计解码器。
A fast, high resolution digital-to-analog converter (DAC) is described herein.
本发明描述了一种快速、高分辨率的数模转换器(DAC)。
This paper describes the design and the test results of a 7-bit high-speed CMOS DAC, which is implemented using a segmented architecture with 5 MSBs in unary way and 2(LSBs) in binary way.
介绍了一种高速7位DAC的设计及芯片测试结果，该DAC选取高5位单位电流源，低2位二进制电流源的分段结构。
An ADC designed in accordance with the techniques described herein utilizes a quantizer that has a lower resolution than a digital-to-analog converter (DAC) used for negative feedback.
根据在此所述的技术设计的ADC采用分辨率比用于负反馈的数模转换器(DAC)低的量化器。
To prevent the carrier leakage caused by DC-offset, the 7-bits DAC is inserted to cancel this dc-offset.
由于发射器的载波泄漏会对线性度造成影响，论文提出了使用7位电流型DAC来校正上调制器的输出直流失调来提高载波抑制。
A novel microelectromechanical digital-to-analog converter(MEMDAC) analogous to electronic weighted-resistor DAC is proposed in this paper.
提出了一种新颖的基于权值的微机械数模转换器，它的原理与电路中的权电阻数模转换器类似。
The operational mechanism of a 3-bit nonlinear digital-to-analog converter, the selection of resistance network for the DAC and its calculation are discussed in particular.
重点讨论了3位非线性DAC的原理、权电阻网络的选择和计算，并给出了实际电路。
Discretionary access control (DAC) is the kernel of most protection mechanism, and the research on safety of DAC concerns whether rights can be leaked to unauthorized subjects.
自由访问控制(DAC)是大多数操作系统保护机制的核心，DAC的安全性研究关注对象的权限是否被泄漏给未授权主体。
Specify the location and name for the extracted DAC package.
指定提取的DAC包文件的路径和文件名。
By changing the amplification multiple through DAC signals, the measurement range of the system is improved.
用DAC芯片程控信号调理电路的放大倍数，提高了系统的测量范围。
In the circuit design, unit current source arrays and digital synchronizing cells are used to improve the matching and dynamic range of DAC.
电路设计中使用单位电流源阵列和数字同步控制单元来提高电流源的匹配性和动态范围；
OBJECTIVE: To prepare the diclofenac acid choline (DAC) eye drops and determine its contents.
目的：制备双氯芬酸胆碱滴眼液并测定其含量。
In situ Raman spectra of cycloheptane have been characterized under high pressure generated by diamond anvil cell (DAC) at room temperature.
利用金刚石对顶砧(DAC)装置产生高压，在室温下对环庚烷进行了高压原位拉曼光谱研究。
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