查询词典 control key

The BCH coded authentication data is modulated by chaotic sequence and then embedded into the DCT domain of the image by using the owner's private key.The embedding process is controlled by Just Noticeable Difference of the DCT block.Users can extract the authentication data with the public key,while they can't get the private key to destroy or delete the watermark through the public key.

提出一种基于非对称水印的图像认证改进算法，算法中将经过BCH编码和混沌序列调制的认证信息作为水印，利用所有者私钥嵌入图像DCT域，嵌入过程根据DCT块的可视噪声阈值控制，用户可以利用公钥从水印图像中提取认证信息，但无法从公钥中获取任何私钥信息，从而无法破坏或删除水印。

Every industrialized country lists the numerical control technology and numerical control equipment as country's critical materials besides in the world, not only come to develop self numerical control technology and their estate adopting an important measure, and the effectuation blockades and restricts policy in the respect of the numerical control key technology and equipment "high-grade , precise , and advanced" to our country

此外世界上各工业发达国家还将数控技术及数控装备列为国家的战略物资，不仅采取重大措施来发展自己的数控技术及其产业，而且在"高精尖"数控关键技术和装备方面对我国实行封锁和限制政策

Beginning with characters of stratospheric environment, analyzed four key technologies in achieving the goal of fixed-point resident of airships, which are attitude control, drive control, flotage control and position control.

从平流层的环境特点出发，分析实现飞艇的定点驻留所需要解决的姿态控制、动力控制、浮力控制和位置控制等4类关键技术。

The result of this thesis can provide the actual method to control the reactive flywheel better for the high accuracy satellite attitude control system. The key technique of the reactive flywheel applied in the high accuracy satellite attitude control system is mastered."Zero momentum control" at three mutually perpendicular axes of satellite is realized on the real meaning.

本文的研究成果为反作用飞轮的精确控制提供了实际的途径，掌握了反作用飞轮应用于高精度卫星姿态控制的关键技术，实现了真正意义上的卫星三轴"零动量控制"。

Servo controller is key part of antenna control system.In some servo controller,classic PID control algorithm is adopted. In order to improve precision of control system,the integral parameter has been turned too big to use because it will cause integral saturation which depress system performance.On the other hand,ISA bus is used to communicate between servo controller and main computer.ISA is low speed interface protocol,it cannot provide more data for complicated real time position control in servo controller.

伺服控制器是天线伺服控制系统的核心环节，经典的PID控制算法在整定时整定出的积分环节参数较大，很容易出现积分饱和，造成控制精度的降低；另一方面伺服系统中伺服控制器与主控计算机通过低速的ISA总线进行通信，无法满足控制器进行复杂的位置控制运算所要求的实时大信息量的数据传输。

Based on the theory and experiments, the paper builds up the simplified mathematical model of the servo control system, deduces the system control rigidity expression, and points out the method to improve control rigidity. According to Routh stability criterion, the analytic stability condition is solved, which shows the conflict between the stability and control rigidity and that gyroscope is the key factor of the conflict.

论文结合理论和试验建立了光电稳定伺服控制系统的简化数学模型，推导出系统控制刚度表达式，指出提高控制刚度的方法；利用劳斯判据求解出系统稳定的解析条件式，描述了稳定性与控制刚度之间的矛盾，并指出陀螺是矛盾关键。

In addition every industrially developed country in the world also classifies the technology and numerical control equipment of numerical control as the strategic materials of the country, not merely take the great measure to develop one's own numerical control technology and industry, and implement blockading and restrictive policy to our country in " high-grade , precision and advanced " key technology and equipment of numerical control.

此外世界上各工业发达国家还将数控技术及数控装备列为国家的战略物资，不仅采取重大措施来发展自己的数控技术及其产业，而且在&高精尖&数控关键技术和装备方面对我国实行封锁和限制政策。

Uses the automated control not only on the galvanization production line to be possible to raise the product manufacturing efficiency and to reduce worker's labor intensity, and has the very good economic efficiency and the social efficiency, galvanizes on the production line to be possible to realize the automated control using PLC, PLC has the reliability to be high, the compatibility is broad, has the correspondence function, the structure modulation characteristic, therefore how to use good PLC to become the galvanization production line automation control key, auxiliary to galvanized the automatic production line driving with PLC by the frequency changer to carry on the automatic control, had the structure to be simple, the programming was convenient, the operation was flexible, the use safe, worked stable, the perform reliably and the antijamming ability strong characteristic, was one kind of very effective automatic controlThe way, is galvanizes the production to realize, the low cost, the high grade automated production development direction highly effective.

在电镀生产线上采用自动化控制不但可以提高产品生产效率和减轻工人的劳动强度，而且有着非常好的经济效益和社会效益，电镀生产线上运用PLC则可以实现自动化控制，PLC具有可靠性高，适应性广，具有通信功能，结构模块化的特点，因此如何使用好PLC成了电镀生产线自动化控制的关键，用PLC辅以变频器对电镀自动生产线行车进行自动控制，具有结构简单、编程方便、操作灵活、使用安全、工作稳定、性能可靠和抗干扰能力强的特点，是一种很有效的自动控制方式，是电镀生产实现高效、低成本、高质量自动化生产的发展方向。

The core of modern audit management is to strengthen auditing quality management,which includes dividing quality control method,key point quality control method,reexamining quality control method and self examining quality control method.

现代审计管理的核心是加强审计质量管理，加强审计质量管理的方法有分层质量控制法，关键点质量控制法，复查质量控制法，自查互查质量控制法。

A: The Law consists of seven chapters 66, on supervision and management of air pollution control system, the major legal systems, control burning air pollution, pollution prevention and control emissions from motor vehicles and vessels as well as the prevention and control exhaust, dust and odor pollution key measures, and legal responsibilities have taken a more clear and specific provisions.

答：该法共7章66条，对监督和空气污染控制系统管理，主要的法律制度，控制燃烧空气污染，污染防治和机动车辆和船只以及预防和控制排放量控制废气，尘和恶臭污染的关键措施和法律责任采取了更加明确和具体的规定。

Foods high in this vitamin include oily fish such as salmon, tuna and, and fish liver oils.

维生素D含量高的食物包括诸如大麻哈鱼、金枪鱼和鲭鱼之类的油鱼以及鱼肝油。

We need you to cosign our public letter demanding that press intimidation cease immediately, and that all charges be dropped.

我们需要您cosign我们的公共信，要求记者立即停止恐吓，并要求所有收费下降。