A cleaning robot for underwater hull surface is designed, which mainly includes adsorption mode, track driving mode, driving mechanism and cleaning mechanism. the double track moving mode has the advantages of large c...
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We consider parameterized concurrent systems consisting of a finite but unknown number of components, obtained by replicating a given set of finite state automata. Components communicate by executing atomic interactio...
ISBN:
(纸本)9783030451899;9783030451905
We consider parameterized concurrent systems consisting of a finite but unknown number of components, obtained by replicating a given set of finite state automata. Components communicate by executing atomic interactions whose participants update their states simultaneously. We introduce an interaction logic to specify boththe type of interactions (e.g. rendez-vous, broadcast) and the topology of the system (e.g. pipeline, ring). the logic can be easily embedded in monadic second order logic of >= 1 successors (WS kappa S), and is therefore decidable. Proving safety properties of such a parameterized system, like deadlock freedom or mutual exclusion, requires to infer an inductive invariant that contains all reachable states of all system instances, and no unsafe state. We present a method to automatically synthesize inductive invariants directly from the formula describing the interactions, without costly fixed point iterations. We experimentally prove that this invariant is strong enough to verify safety properties of a large number of systems, including textbook examples (dining philosophers, synchronization schemes), classical mutual exclusion algorithms, cache-coherence protocols and self-stabilization algorithms, for an arbitrary number of components.
To understand the latest research progress, research trends and future research hotspots of oil-water separation and oil absorption materials for oil spill and oily wastewater at home and abroad, through the web of sc...
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Underwater fishing robots have been more and more widely used in ocean breeding nowadays. they have become the most effective and potential tools in underwater fishing. A small-scale underwater fishing robot has been ...
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In Brazil, conventional construction sites processes prevail, where the workers develop outdoor activities and are exposed to environment variables, which, along withthe personal variables - metabolic rate and clothi...
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ISBN:
(纸本)9783030204976;9783030204969
In Brazil, conventional construction sites processes prevail, where the workers develop outdoor activities and are exposed to environment variables, which, along withthe personal variables - metabolic rate and clothing - may cause heat stress. this article evaluates the heat exposure that workers with outside activities on concrete slabs during the construction of buildings in the city of Campinas, state of Sao Paulo, in Southeastern Brazil. For the data collection, the analysis and exposure evaluation it was used the norms ISO 7243, ISO 8996, ISO 9920 and the Norma Regulamentadora Brasileira (NR5) that foresees the tolerated limits of heat exposure. It was analyzed the Wet Bulb Globe thermometer Index (WBGT) along withthe metabolic rate estimated of 40 exposed construction workers. the results show that, in every season of the year there is the necessity of heat exposure monitoring to avoid health damage to the construction workers' health.
Over the last twenty years, the apparel industry has modernized the design process, by integrating digital design tools and technologies to collect and analyze body measurements, draft patterns, conduct fittings and m...
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ISBN:
(纸本)9783030204709;9783030204693
Over the last twenty years, the apparel industry has modernized the design process, by integrating digital design tools and technologies to collect and analyze body measurements, draft patterns, conduct fittings and manufacture. However, for performance hand wear and tool design, many of the methods used today are outdated and limit innovation opportunities. By integrating digital design tools from the apparel industry, there is an opportunity to develop products, to improve fit, performance and safety. this is especially important for users that rely on products for hand protection and accuracy, including, athletes, military personal, surgeons, construction and fire service workers. the following paper demonstrates how a performance hand wear and tools innovation approach developed by the author, was used by a graduate student to create a new glove for road cycling. Future work using the approach will aid in designing products for other users and help manufacturers improve safety and overall performance.
Computers store numbers in two mutually incompatible ways: little-endian or big-endian. they differ in the order of bytes within representation of numbers. this ordering is called endianness. When two computer systems...
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ISBN:
(纸本)9783030452360;9783030452377
Computers store numbers in two mutually incompatible ways: little-endian or big-endian. they differ in the order of bytes within representation of numbers. this ordering is called endianness. When two computer systems, programs or devices communicate, they must agree on which endianness to use, in order to avoid misinterpretation of numeric data values. We present Endicheck, a dynamic analysis tool for detecting endianness bugs, which is based on the popular Valgrind framework. It helps developers to find those code locations in their program where they forgot to swap bytes properly. Endicheck requires less source code annotations than existing tools, such as Sparse used by Linux kernel developers, and it can also detect potential bugs that would only manifest if the given program was run on computer with an opposite endianness. Our approach has been evaluated and validated on the Radeon SI Linux OpenGL driver, which is known to contain endianness-related bugs, and on several open-source programs. Results of experiments show that Endicheck can successfully identify many endianness-related bugs and provide useful diagnostic messages together withthe source code locations of respective bugs.
Branching bisimilarity is a behavioural equivalence relation on labelled transition systems (LTSs) that takes internal actions into account. It has the traditional advantage that algorithms for branching bisimilarity ...
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ISBN:
(纸本)9783030452360;9783030452377
Branching bisimilarity is a behavioural equivalence relation on labelled transition systems (LTSs) that takes internal actions into account. It has the traditional advantage that algorithms for branching bisimilarity are more efficient than ones for other weak behavioural equivalences, especially weak bisimilarity. With m the number of transitions and n the number of states, the classic O(mn) algorithm was recently replaced by an O(m(log |Act | + log n)) algorithm [9], which is unfortunately rather complex. this paper combines its ideas withthe ideas from Valmari [20], resulting in a simpler O(mlog n) algorithm. Benchmarks show that in practice this algorithm is also faster and often far more memory efficient than its predecessors, making it the best option for branching bisimulation minimisation and preprocessing for calculating other weak equivalences on LTSs.
the JACK ergonomic analysis software was used to simulate and analyze the driver's driving posture and operating behaviors in the cockpit to simulate and optimize the driving comfort of the driver operating a cert...
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ISBN:
(纸本)9783030202279;9783030202262
the JACK ergonomic analysis software was used to simulate and analyze the driver's driving posture and operating behaviors in the cockpit to simulate and optimize the driving comfort of the driver operating a certain model of agricultural material handling vehicle. through simulation and analysis of the six tools, Comfort Assessment, Lower Back analysis, Static Strength Prediction, Etc., it was found that the vehicle cockpit's curve of the waist part of the seat was reasonable, but the design had poor comfort levels on the shoulder and neck part, which not only caused fatigue when the vehicle was operated for a long period of time, but also made it challenging for the knees and ankles from sustaining prolonged work at the cockpit. On this basis, the research proposed ergonomic optimization and improvement was also conducted. the research provides a significant basis of reference for designing the cockpits of special-purpose agricultural vehicles.
Based on the analysis of the logistics hubs construction process, this paper uses the panel data of 31 provinces, regions except Hong Kong, Macao and Taiwan to measure the impact of regional industrial structure devel...
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