New Year paintings, or nianhua, created in Liangping with the use of the technique of woodblock printing, represent folk art that weaves together distinct local features, aesthetic perception and technical mastery of the artists. One of the key nianhua themes is the imagery of “Men Shen”, or door gods, that banish the evil and guard doors and gates. The article discusses the imagery of door gods in Liangping nianhua printed from woodblocks.
Asthma, a chronic respiratory ailment, affects millions worldwide. Extracorporeal membrane oxygenation (ECMO) has gained traction as a life-saving intervention for patients with severe asthma who are unresponsive to conventional treatments. However, complications associated with ECMO, including electrolyte imbalances and hemorrhage, can have significant clinical implications. This case report highlights a 49 years-old male patient with severe asthma who developed pronounced hypokalemia and hemorrhage following venovenous ECMO (VVECMO) therapy. Despite potassium supplementation, serum potassium levels continued declining before normalizing after 24 h. The patient subsequently experienced gastrointestinal bleeding, cerebral hemorrhage, and extensive cerebral infarction, ultimately resulting in a deep coma. Hypokalemia during ECMO therapy can result from a rapid reduction of carbon dioxide, β-receptor agonist use, corticosteroid use, and diuretic administration. Hemorrhage is another common ECMO complication, often linked to heparin anticoagulation therapy. Clinicians should be aware of potential complications and adopt appropriate prevention and management strategies when using ECMO in patients with severe asthma.
In this paper, a design and construction of a cycling-based wheelchair prototype with leg-exoskeletons are proposed with product considerations for persons who have lower limb problems. For the conceptual and mechanical design, an exoskeleton linkage attached to wheelchair is designed carefully for comfortable considerations to users. Particularly, functional flowchart and control is proposed to enable the prototype to help users to move around and to exercise simultaneously. In addition, two prototypes built in the years of 2015 and 2017 are shown and compared to describe the characteristics of the solutions. At last, the product considerations are analyzed according to our design.
As an useful tool, GIS has applied in cartography, resource management, environment analyse and traffic management. With the development of information and social economy, civil defense work become more complex and important, and it has to be managed efficiently, to encounter abrupt events. The article analyses the theory and the technology of civil defense management work by GIS. Using Jingan Civil Defense GIS, the article introduces the structure, design of database, main modals and functions of the system. The article has the meaning of reference to other systems.
Feasible feedrate plays an important role in improving machining efficiency in end milling operation, but it needs complicated calculation to acquire the value. The paper presents a learning fuzzy logic based approach for intelligent determination of the condition. Limitations about rule-based expert system in selection of machining parameters for milling process are summarized and discussed. Then a learning fuzzy logic based inference model is brought forth as an intelligent feedrate selection engine according to three machining conditions: tool diameter, cutting depth and material hardness. A method composed with artificial neural network and data cluster is applied to obtain the inference knowledge for the fuzzy logic model. In the end, an illustration is given to show the applicability of the proposed approach. The results show good performance in determination of the parameter. A conclusion is reached that the reasoning logic can provide a new measure in intelligent selection of feedrate for end milling process
Abstract The super-giant Rumaila oilfield, with siliciclastic and carbonate reservoirs, has been developed for nearly 70 years. However, the Mishrif carbonates, which account for nearly half of Rumaila's reserves, could not be mass developed, as the current recovery rate is only 6%. One of the complexities is due to the presence of thin layers with abnormally high permeability, called thief-zones, which make reservoirs extremely heterogeneous and injection water breakthrough very early. Therefore, it is necessary to decipher the reservoir genesis and complicated architectures by genetic analysis, reservoir characterization and modeling for Mishrif's efficient development. Based on key flooding and erosion surfaces, sedimentary cycles in lithofacies and petrophysical responses, stratigraphy correlations and seismic strata stacking configurations, the fine isochronal stratigraphy framework of the Mishrif Formation has been constructed. Then, the genetic processes of lithofacies differentiation, reservoir distributions and properties, and thief-zones in response to palaeotopography and relative sea-level changes are analyzed synthetically in lithofacies, well-log sections, dynamic data and layer models from geological seismic units interpreted. According to petrophysics detection and reservoir genesis, the thief-zone distribution model is acquired. Subsequently, constrained by genetic conditions, 3D-gridding porosity model and double medium permeability model are constructed by simulation and integrated understanding of intricate architectures and permeability from cores and dynamic data. This paper demonstrates: 1) The Mishrif Formation can be divided genetically into six zones, from Zone Z1 to Z6; 2) The palaeotopography and relative sea-level changes control reef-flat deposition and differentiation so that the thick, coarse and clean lithofacies are usually distributed on upper parts of reef-flat build-ups but become finer in lower-side places. Furthermore, the Z1 thickness has important influences on Z1 and subsequent depositions; 3) Thief zones are not stress fractures, but rather erosion and leaching surfaces developed on top of reef-flat buildups in coarse lithofacies due to relative sea-level fluctuations; 4) The porosity models demonstrate high porosity (30-18%) in relative coarse lithofacies of reef-flat buildups, and reflect genesis of depositional energy environments by porosity distributions; 5)The permeability model has revealed reservoir intense heterogeneity (0.01- 4000mD), in which, the extremely high (>1000 mD) reservoirs, the thin thief-zones, are distributed mostly with lateral extension of 250-2300 m. The extremely-high, high and low reservoirs comprise complicated reservoir architectures which can at least be divided into three scenarios for reservoir development, in which the development of thief-zones in injectors should be paid more attention to designing perforation intervals because of possibly influences of extremely high permeable thief-zones. The methodology and results in this paper provide crucial references for the development of Rumaila oilfield and similar heterogeneous carbonate reservoirs.
Dynamic interactions between a robot and environments have been an active field for years. A table tennis robot can serve as a comprehensive platform for these researches. Investigating previous work, neither articulated robot nor Cartesian one can solely provide satisfying solutions on this topic. This paper proposes a 9-DOF table tennis robot consisting of a flexible arm, a fast-moving body and highspeed cameras. The high-speed vision system identifies and predicts the target trajectory. The 7-DOF articulated arm can accomplish complicated and flexible operations while the 2-DOF fast-moving body in Cartesian space helps the arm to form an enough workspace. To perform rally task, a distributed and hierarchical control system based on RT-Linux which can be divided into ball trajectory identification, ball trajectory prediction, paddle trajectory planning and a real-time distributed motion controller for joints control is constructed. Experiments demonstrate the validity of the system design.
The knee joint with adequate torque is necessary in order to achieve natural, fast and versatile motions. However, the margin of torque for a knee joint occurs because of a reducer with constant reduction ratio. Therefore, a new rigid mechanism for a knee joint with continuously variable reduction ratio is proposed in this paper. Firstly, the requirements of a new mechanism should be met to reduce the margin of torque. And the requirements were got based on motion simulation of BHR-5. Then, the new mechanism is developed and the parameters of link length and the angle between links for the new mechanism is determined. Finally, the motion simulation of BHR-5 based on the new mechanism is conducted to verify the effectiveness and feasibility of the new rigid mechanism.
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