According to the enterprise standards of "assembly and test norms for ZQ2005 clutch booster", the test projects for comprehensive performance, including pressure seal, hydraulic seal and input -output performance were researched [1]. An integrated test system based on electrical components, such as the data acquisition card, motion control card, supercharger, proportioning valve, solenoid valve was designed. And the data acquisition and data processing modules of detection system based on MFC were developed. Finally, the test procedure and the experimental program were designed. And the TianLong clutch booster 1608ZB7C-010 was tested synthetically efficiency. The results show that the detection system meets the test requirements in contrast to the test data and curves measured by the foreign instrument.
During the individual escape, free ascent is the only way to decompression. While the men are situated in the deep pressure, the velocity of ascent, the time of getting to balance become the most important factors for escape. The paper use mathematical methods, consult the hydrodynamics parameter which educed by experiment, simulate the ascent rule while the men are in the individual escape suit, and calculate the ascent velocity, acceleration, balance time of different weight, and compare the simulation result with the experiment , which can prove the veracity of simulation.
Virtual machine escape is one of the most serious vulnerabilities happening if the isolation between the hosts and between the VMs is compromised, which presents new security challenges that the security concern is the major factor effecting virtualization technology widely adopted in IT industry. In VM escape, the program running in a virtual machine is able to completely bypass the hypervisor layer, and get access to the host machine. The traditional research method is analyzing a vulnerability separately, but that consumes too much time and not constructs the attack model. So we innovatively design VM escape elevated penetration attack models based on finite state machine, which could be used to identify potential vulnerabilities in design, implementation and testing phases. In this paper, firstly, we extract elevated privilege models of different virtualization methods, studying that VMCS pointer instruction state indicates system state. Secondly, we define a formal language Datalog to represent pre-and post-conditions of the exploits of application vulnerabilities and infer a basic elevated penetration attack model. Thirdly, through the analysis of vulnerable source code and vulnerability reports from NVD, we shed light on four attack models to cover the most VM escape attacks. Finally, we evaluate the presented approach by applying code-level finite state machine models with formal language to specific vulnerabilities, together with the statistical results of different attack models.
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