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Spillway is an important flood control facility for hydraulic architectures, whether the design and layout of the spillway are reasonable or not can directly affect the safety of hydraulic architectures and the investment of the entire project. To discuss the rationality of the designed reinforcement scheme for spillway of Goushuipo Reservoir in China, this paper employed the Computational Fluid Dynamics (CFD) methods, Volume of Fluid (VOF) model and Re-Normalization Group (RNG) model to simulate the water surface line of spillway under different verified flood standard conditions based on the measured data of water surface line of spillway of the Goushuipo Reservoir. By comparing with the test values, it’s verified that the simulation results are of high accuracy; then on this basis, this paper analyzed the relationship between water level and water flow of spillway under different conditions and other hydraulic performance such as the water flow state. Moreover, according to the simulation results, this paper analyzed the problems with the original design scheme and further proposed an optimized scheme: the two-step water-drop energy dissipation scheme for the Goushuipo Reservoir, and performed numerical simulation on the optimized scheme. At last, the simulation results proved the rationality of the optimized scheme, and the research findings of this paper provide useful references for the reinforcement project of the target reservoir in the future.

In order to explore the design strategy of participatory design approach in the design of external human-machine interface (eHMI), this paper at the theoretical level researches the relevant literature and typical interfaces of eHMIs, and sorts out the basic concepts of explicit human-vehicle interaction features theory. Through the user participatory design method, we summarized the key design points of the eHMI and produced a design prototype, and optimized the prototype according to the participatory design experimental results and actual needs to obtain a design solution. The design was tested and evaluated at the practical level, and a strategy for user participation in the design of the external human-machine interface was concluded. The results show that the participatory design approach can improve the usability and acceptance of eHMIs, reduce the cognitive differences in the presentation of interface content, and provide a reference for the design of out-of-vehicle HCI in future work.

Diet management has become a common concern in daily life. Most of the current related designs provide accurate calorie estimates and personalized diet recommendations, which does not touch the core of management – how to make this behavior active and sustainable. This study introduces the concept of Positive Design, constructs a three-step design path which is applied in practice, aiming to give long-term happiness to diet management and promote users’ active adherence. The vital step is to invite target users and designers to join in collaborative work, identify and filter eight conflict dilemmas which are worthy of study. Positive design is a new theoretical perspective based on positive psychology. The final scheme produced in this paper aims to explore the application of this method in diet management design, and also provide a certain reference for subsequent research.

The purpose of this paper is to compare and analyze the advantages and disadvantages of near-infrared autofluorescence (NIRAF) imaging, nano-carbon negative imaging and conventional naked eye recognition technology in recognizing parathyroid glands during surgery, and to preliminary evaluate the effectiveness, safety and feasibility of NIRAF imaging in the recognition of parathyroid glands. The clinical trials retrospectively analyzed 36 patients, including 12 patients in Group A (NIRAF imaging group), 12 patients in Group B (nano-carbon negative imaging group), and 12 patients in Group C (conventional naked eye recognition group). The number of parathyroid glands recognized during surgery in Group A was more than that in Group B and C. The time taken to recognize parathyroid glands in Group A was shorter than that in Group B and C. There was no significant difference in the average calcium ion levels of the three groups A, B and C before surgery. After surgery, the average calcium ion level of Group A was not significantly different from that of Group B, but it was higher than that of Group C, and the difference was significant. The incidence of postoperative hypocalcemia in Group A was not significantly different from that in Group B, but it was lower than that in Group C. The incidence of postoperative symptomatic hypocalcemia in Group A was lower than that in Group B and C. Compared with traditional technology, NIRAF can recognize more parathyroid glands during surgery, take less time, and make the probability of postoperative hypocalcemia and symptomatic hypocalcemia lower during thyroid surgery. It needs noninvasive and simple operation. It is a kind of safe, effective and feasible parathyroid gland recognition technology, which is worth further exploration.

A one-pot, four-component reaction was developed for the synthesis of indolizines from pyridines, α-halide carbonyl compounds, primary amines, and maleic anhydride. The key step in this reaction involved the copper-catalyzed aerobic oxidative aromatization of a tetrahydrogen–indolizine intermediate. Oxygen gas was employed as a clean oxidant to facilitate the catalytic process. Notably, this transformation used readily available starting materials, exhibited broad substrate scope, was easy to handle, and required mild reaction conditions.

A one-pot method for synthesizing multi-substituted indolizines from α-halo-carbonyl compounds, pyridines and electron deficient alkenes was developed. A sub-equivalent amount of potassium dichromate was used as an oxidant under base free conditions. The transformation developed should be of economic efficiency.

A one-pot method for synthesizing multi-substituted indolizines from α-halo-carbonyl compounds, pyridines and electron deficient alkenes was developed. A sub-equivalent amount of potassium dichromate was used as an oxidant under base free conditions. The transformation developed should be of economic efficiency.

In modern life, more and more work needs to be done in sitting position. So sitting comfort is of vital importance. However, comfort was always different by personal feelings. This paper studied the evaluation of sitting comfort in the way of comparing subjective comfort scales and objective computer data, which was carried out by the equipment of X-sensor pressure distribution system. Through two experiments and with formulas analysis, materials of chairs were evaluated of their comfort characteristics.

The theoretical basis and implementation solution of business process simulation and analysis system (BPSAS) is put forward in this paper. With workflow technology, Petri net theory and simulation technology, the workflow engine independent business process analyzing system is realized to provide Petri net based business process analysis. Further more, an example is illustrated to demonstrate how to analyze business process in order to select optimized model. And at the same time, as a business process analyzing tool, it supports the specified BPM (business process management) process.

The development of computer and pervasive computing technology has made a breakthrough in non-material cultural heritage protection. Digital reconstruction of heritage and new HCI (human-computer interaction) medium makes it possible to let the audiences get more close-up experience. In this paper, hand gesture interaction was introduced to simulate the playing methods of chime-bell. In "hand gesture modeling" phase, the apparent hand model was built due to its little cost; In "hand gesture segment" phase, the skin color based segmentation method was adopted due to its simple and real-time behalf; In "hand gesture recognition" phase, the Freeman Chain Code was used to encode the outline of hand to recognize the characteristics of hand gesture. And what's more, the emotion of the gesture was considered in order to enhance the recognition accuracy and the interesting of the interaction system. Last, the implementation of digital chime-bell interaction system verified the researches' efficiency. The system's recognition accuracy with no more than three times repeat was 91.3%. That shows it is suitable in "digital museum" and other applications.

The posture prediction is important in ergonomics evaluation system and virtual human animation. The posture choosing phase by human is a non-logical evolutionary approach, so we adapt orthogonal interactive genetic algorithm (OIGA) to calculate the weights of different factors which affect posture choosing. The case analysis of driving posture prediction and the application of the Ergonomics Driving Simulation System proves that OIGA can use a less interactive algebra to reach a higher value. So it is a feasibility and practicability algorithm.