Research on Network Security Level Protection Measurement Strategy in the Context of Cloud Platforms

Platforms facilitate information exchange,streamline resources,and reduce production and management costs for companies.However,some viral information may invade and steal company resources,or lead to information leakage.For this reason,this paper discusses the standards for cybersecurity protection,examines the current state of cybersecurity management and the risks faced by cloud platforms,expands the time and space for training on cloud platforms,and provides recommendations for measuring the level of cybersecurity protection within cloud platforms in order to build a solid foundation for them.

STRUCTURAL PARAMETERS CALIBRATION BY POSTURE MEASUREMENT ON PARALLEL 6-DOF PLATFORM

Some approaches to measure parallel 6-degree of freedom platform's posturestatically and to calibrate the platform's actual structural parameters by measuring a series of theplatform's varying postures are studied. In the case where high posture accuracy is requiredrelatively, to obtain the platform's actual structural parameters is very important. Threedimensions measurement with 2 theodolites are used to obtain the platform's postures statically andNewton iterative method is adopted to calibrate structural parameters. Some measures taken in themeasurement and the calibration are discussed in detail. And the experiment results of theplatform's posture control before and after the calibration are given. The results show that theplatform's posture control accuracy after the calibration is improved notably.

Experimental and Numerical Study of the Effect of Surround Protection Technique on the Strain Measurement for Offshore Jacket Platform

For strain measurement on offshore jacket platform in deep water, waterproof of strain foil is always an important issue, especially, due to the high pressure in deep water. The waterproof is difficult in two places, one is between the matrix structure and the protection structure, and another is between the lead wires and the protection structure. The surround protection technique discussed in this paper is conventional and ideal, and can be operative for a long time, up to five years. In this method, a metal case and tube is added on the local position, which increases the local rigidity, but the effect on the measurement of strain is not well studied. In this paper, the effect of the surround protection technique on the strain measurement is studied by using numerical and experimental methods, and the results show that the measurement error is well in the range permitted by engineering practice.

Safety assessment of platform loadout procedures based on unascertained measures

Safety assessment of offshore platforms is an urgent task. Such assessments are now focusing on the structure, maintenance, and retirement of a platform. Some methods employed have many shortcomings. For example, they cannot make the reliability adequately explicable. Therefore, a mathematical tool, the unascertained measure, was introduced. First, the basic knowledge of the unascertained sets was introduced briefly. Second, the unascertained measure was defined and credible identification was set up. The method has been introduced into the fields for safety assessment of a jacket loadout procedure. Engineering practices showed that it can complete the safety assessment systematically and scientifically without any assumption. The work should have significance in theory and practice for offshore engineering.

Measurement Studio for VC++的快速可重组测控系统开发

介绍在Visual C++6.0环境下结合NI提供的软件开发包Measurement Studio,开发快速可重用的测控实验系统,具体分析Measurement Studio用户控件在Visual C++环境下的使用。

BBACIMA:A Trustworthy Integrity Measurement Architecture through Behavior-Based TPM Access Control

Two limitations of current integrity measurement architectures are pointed out： （1） a reference value is required for every measured entity to verify the system states, as is impractical however; （2） malicious user can forge proof of inexistent system states. This paper proposes a trustworthy integrity measurement architecture, BBACIMA, through enforcing behavior-based access control for trusted platform module （TPM）. BBACIMA introduces a TPM reference monitor （TPMRM） to ensure the trustworthiness of integrity measurement. TPMRM enforces behavior-based access control for the TPM and is isolated from other entities which may be malicious. TPMRM is the only entity manipulating TPM directly and all PCR （platform configuration register） operation requests must pass through the security check of it so that only trusted processes can do measurement and produce the proof of system states. Through these mechanisms malicious user can not enforce attack which is feasible in current measurement architectures.

Design of mobile sensing system for automatical measurement

Based on mobile devices as a solution for measurement faces interesting challenges, which involve poor human- computer interaction and limited computer capability. In this paper, we present the mobile sensing system （MSS） with func- tions of constructing, configuring and implementing measurement applications. MSS consists of a mobile device and a sensor probe, In the mobile device we install a pocket virtual instrument platform （PVIP）, which has object-oriented software ar- chitecture and can be configured through extensible markup language （XML） files. And these configuration files can be written to the probe. Therefore, the probe can produce the measurement of APP in the mobile device. This infrastructure has been illustrated by a sound signal acquisition task and a flexible force measurement task which are finished with an android smartphone and a probe. These examples suggest that MSS is reconfigurable, highly automatical and flexible.

Vibration Characteristics of An Offshore Platform and Its Vibration Control

A template offshore platform, located in the Bohai Bay of China, has exhibited excessive, unexpected vibration under mildly hostile sea conditions, which has affected the normal operation of the platform. Since the structure was designed to sustain more severe wave climate, the cause of the excessive vibration has been suspected to originate from other sources. The main objectives of this study are to investigate the causes of the excessive vibration, and to explore possible remedies to solve the problem. In this paper, the vibration behavior of the offshore platform is analyzed by means of finite element (FE) modeling, field measurements and laboratory test. Results of analysis suggest that relative movement and impact between the piles and the jacket legs exist, i.e. the piles and the jacket are not perfectly connected. The disconnection of the piles and jacket weakens the overall stiffness of the platform, and therefore produces unexpected excessive vibration. In this study, measures for reducing the excessive vibration are proposed to control the response of the platform.

A novel wide-range precision instrument for measuring three-dimensional surface topography

We developed a measuring instrument that had wide range, high precision, small measuring touch force. The instrument for three-dimensional (3D) surface topography measurement was composed of a high precision displacement sensor based on the Michelson interference principle, a 3D platform based on vertical scanning, a measuring and control circuit, and an industrial control computer. It was a closed loop control system, which changed the traditional moving stylus scanning style into a moving platform scanning style. When the workpiece was measured, the lever of the displacement sensor returned to the balanced position in every sample interval according to the zero offset of the displacement sensor. The non-linear error caused by the rotation of the lever was, therefore, very small even if the measuring range was wide. The instrument can measure the roughness and the profile size of a curved surface.

Development of a Stabilized Pan/Tilt Platform and the State of the Art

In the context of this paper, a small scale, medium precision, stabilized pan/tilt platform is developed as a prototype, which is used to compare various stabilization algorithms experimentally. The overall performance of the system depends on rigid body dynamics, structural dynamics, servo control loops, stabilization control algorithm, sensor fusion algorithm and sensory feedback such as from the IMU （inertial measurement unit）. In the case that the response bandwidth of the overall system is high enough, the same hardware can also achieve active vibration isolation. All of these design aspects are investigated in the paper via numerical models and with their experimental verification.

基于双自由度转台的全向空间单目视觉室内定位测量方法

针对传统单目视觉测量系统测量视场有限的问题,本文提出一种基于双自由度旋转平台的全向空间单目视觉测量方法。首先,对双自由度旋转平台的转轴参数进行标定,用副相机拍摄固定在双自由度转台上的棋盘格标定板,提取棋盘格角点的位置坐标,并将其转化到同一相机坐标系下。利用PCA(主成分分析)平面拟合得到初始位置转轴参数中的方向向量,使用空间最小二乘圆拟合方法得到初始位置下转轴参数中的位置参数。然后,通过转台转动的角度以及罗德里格斯公式将不同位置下相机获取的数据进行坐标系统一,实现水平和竖直方向全向空间下的目标测量。最后,通过高精度激光测距仪验证了本方法的测量精度,并通过与双目视觉测量系统、wMPS测量系统进行比对实验,验证了本方法的全向空间测量能力。实验结果表明,本方法测量精度基本达到双目视觉测量系统水平,但测量范围远大于双目视觉测量,可以满足全向空间测量要求。

基于BP神经网络的重力仪高机动状态快速调平修正技术

针对平台式重力仪大机动状态后测量能力恢复慢的问题,提出一种基于BP神经网络的重力仪稳定平台快速调平修正技术。首先,针对动态重力测量在测量平台大机动状态后调平能力不足的问题,研究了基于BP神经网络的平台姿态高效、准确解算方法;其次,利用惯性元件和卫星导航系统(GNSS)的信息优化BP神经网络,形成不同条件的平台姿态提取优化模型;最后,利用模拟仿真实验和实际机载动态重力测量数据验证所提方法的有效性和准确性。实验结果表明在大机动的动态条件下采用所提方法可以扶正重力仪稳定平台,将机动后重力仪稳定平台稳定时间缩短83.3%以上,提升动态重力测量效率。

数字化协同平台在龙首矿的应用

龙首矿当前采用CAD二维作图,对于数据文件的存储和管理方式原始、流程繁琐等问题,开展基于DIMINE的数字化协同作业与应用研究。将矿山传统的地、测、采等专业间离散、独立、分割的技术管理模式向三维集成化、多专业融合、高效率的企业管理模式转变,从而实现信息的高度共享。采矿数字化和协同作业技术可提高工程师及管理者的信息交流效率,实现矿山地质、测量、采矿技术工作精细化管理。实践证明,数字化生产技术协同平台为同类矿山提供了良好的示范,采用集约化流程管控方式,提高了矿山本质安全,保障了井下作业安全,为我国矿业可持续发展提供支撑。

基于两阶段DEA-SFA模型的科学数据平台资源提供者服务效率研究——以国家生态科学数据中心为例

服务绩效评价是衡量国家科学数据平台发展质量的重要指标,效率测算为其提供重要依据。将国家生态科学数据中心资源提供者的服务过程分为资源服务和知识转化前后相关联的两个阶段,从投入产出要素的使用效率、科学资源的利用程度和用户感知的服务质量3个维度构建指标体系,利用两阶段数据包络分析-随机前沿方法(DEA-SFA)模型对43个资源提供者进行服务效率测算,并运用超效率模型对有效DMU做进一步区分和排名。结果表明:国家生态科学数据中心资源提供者在资源服务和知识转化阶段平均纯技术效率值分别为0.794和0.838,DEA有效站点数分别为12个和16个;在43个决策单元中,优秀资源提供者约占16%,一般资源提供者约占70%,较差资源提供者约占14%;另外,资源提供者的服务效率和地区经济发展水平具有一定关联性,东部地区表现优于中西部地区。基于上述研究结果,进而提出推动我国国家科学数据平台发展建设的相关对策建议。

弱刚性齿轮传动测试台的研制与试验

为了对齿轮传动系统进行更加深入、细致的研究,根据弱刚性齿轮传动轴的振动特点,提出将高精度激光位移传感器用于传动轴的振动测量,研制了一台用于测试弱刚性齿轮传动系统的齿轮测试台,针对弱刚性齿轮传动开展了不同工况条件下振动测试研究。根据弱刚性齿轮传动临界转速较低的特性,对由齿轮和轴组成的转子进行模态分析,得到转子的固有频率,计算了可能引发转子共振的电动机转速;并通过恒载变速试验与恒速变载试验进行了验证。结果表明,该系统在电动机转速为219.69 r/min左右时会到达转子的共振频率;分析数据发现,轴的振动幅值在一定范围内对载荷的响应成线性关系而受转速的影响并不显著。最后,对测试台进行重复性试验,验证了该设备的可靠性与稳定性。

基于WSN和TJ_UWIS的地下结构变形动态监测平台与教学应用

为实现复杂条件下地下结构变形的动态监测,提高学生对无线监测系统的认知,设计了基于WSN(wireless sensor network)和TJ_UWIS倾角传感支点的无线监测实验平台,并应用于实际教学中。该实验平台测量精度高,可以通过TJ_UWIS倾角传感支点测得地下结构的X/Y/Z三向的倾角变形值,从而反映结构的实际变形状况;最大监测频率可设置为1 min/次,可实现结构变形的精准动态监测。该实验平台的应用,有助于提高学生对无线传感监测系统原理与系统组成的认识,掌握具体应用方法,锻炼学生的专业素养和创新思维。

基于大数据平台的神东采掘设备智能化管理研究

针对神东煤炭集团公司采掘设备目前管理的现状以及设备管理中存在的问题,从采掘设备的购置、使用管理、废旧处置3个方面入手,深入分析其存在问题的根本原因,并给出了提高采掘设备管理效率的具体措施,这对神东煤炭集团公司提升采掘设备的管理效率、降低其管理成本,节约设备的投资成本都有重要的指导意义,对其他矿山企业对机电设备的高效管理有借鉴作用。

产业互联网时代企业跨组织动态能力的构念与测量

以平台为本质的平台型企业将成为未来企业的主流,而产业互联网的蓬勃发展为新型平台企业的成长提供了助推剂。与传统企业技术开发平台和消费互联网平台(如淘宝、京东)相比,产业互联网平台企业需要跨组织边界的能力,以便在快速变化的环境中推动多元异质主体实现交互赋能和价值共创。针对经典动态能力在解释产业互联网平台企业相关实践方面的不足,以及经典动态能力理论演进的趋势,结合产业互联网的时代特征,提出并阐释了企业跨组织动态能力的概念,明确了企业跨组织动态能力的结构维度,开发出一个包含16个题项的测量量表。以符合条件的89份中国产业互联网平台企业样本数据进行实证检验,结果证实该量表具备良好的信度和效度。该研究旨在为产业互联网平台化场景下企业跨组织动态能力相关的实证研究奠定构念基础。

高效型SCR尿素计量泵精度标定台方案设计

SCR技术已成为柴油车降低NOX排放的主流技术方法。尿素泵作为SCR系统的核心部件之一,其计量精度直接影响系统运行效率。针对传统的尿素泵标定方法的不足,提出一种基于微小椭圆齿轮流量计的尿素计量泵精度标定台,设计了气助型和非气助型尿素泵标定方案,对于无回流型尿素计量泵,可采用单流量计装在吸液管上直接测量。对于有脉动强且有回流的尿素计量泵,使用“减重”法测量,在吸液管与回液管各安装一个椭圆齿轮流量计,通过差值的办法得到尿素喷射量。经过实践,实时性强,精度高。

建设项目实行“多测合一”改革的必要性探讨

工程测绘贯穿于工程建设项目的各个阶段,对于建筑行业的发展具有重要意义。针对工程测绘存在的多次委托、重复测量等问题,对“多测合一”的必要性进行研究,在分析各地“多测合一”政策的基础上,深入探讨工程测绘工作特点,提出“多测合一”改革目标,并通过搭建“多测合一”信息管理平台的方法优化工程建设项目的工作流程,该文阐述了该平台实现的关键技术,即通过Three.js三维可视化技术实现在线浏览测绘数据和模型,并且在数据可视化、测绘标准统一、工程进度跟踪方面起到了一定作用。