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Patients with infections in the department of critical care medicine have complex sources and diverse sites of infection, which may be associated with multiple pathogenic bacteria and have a high rate of drug resistance, posing a significant challenge to clinical diagnosis and treatment. Infections in the department of critical care medicine can be divided into two types: hospital acquired infections and non-hospital acquired infections, with significant differences in clinical characteristics between the two. This article discusses the relevant concepts, risk factors, pathogenesis, and common characteristics of severe infections such as bloodstream infections, pulmonary infections, intra-abdominal infections, and intracranial infections, as well as diagnostic and treatment plans and prevention and control strategies from the perspectives of hospital acquired and non-hospital acquired infections, aiming to provide valuable guidance for the clinical management of critically ill patients.

Automated Writing Evaluation (AWE) systems have been found to enhance the accuracy, readability, and cohesion of writing responses (Stevenson & Phakiti, 2019). Previous research indicates that individual learners may have difficulty utilizing content-based AWE feedback and collaborative processing of feedback might help to cope with this challenge (Elabdali, 2021; Wang et al., 2020). However, how learners might collaboratively process content-based AWE feedback remains an open question. This study intends to fill this gap by following a group of five Chinese undergraduate EFL students' collaborative processing of content-based AWE feedback on the use of evidence in L2 argumentative writing during five writing tasks over a semester. Student collaboration was examined through tracking the recordings of collaborative discussion sessions as well as their written drafts and revisions, and through collecting interview responses from individual learners. The findings revealed that the collaborative processing of AWE feedback was experienced in three phases, namely the trustful phase, skeptical phase, and critical phase. Although content-based AWE feedback could facilitate the development of some aspects of evidence use, collaborative discourses were instrumental in developing learners' understanding and skills for certain aspects of evidence use that AWE feedback failed to address. The findings suggest that collaborative discourse around content-based AWE feedback can be an important pedagogical move in realizing the potential of AWE feedback for writing development.

In order to effectively evaluate the grinding performance of CBN（Cubic Boron Nitride） grinding wheel in the grinding process, a monitoring method of CBN grinding wheel performance was proposed based on Shannon entropy theory and acoustic emission signal. Firstly, the acoustic emission signal of CBN grinding wheel was collected by an acoustic emission sensor. Then, the probability density and distribution of acoustic emission signal of CBN grinding wheel was estimated by using the maximum information entropy. In addition, the characteristics of acoustic emission signals of CBN grinding wheel during cyclic grinding after dressing and residual grinding with different diameters were analyzed and discussed. Subsequently, the relationship between the maximum entropy probability density distribution of acoustic emission signals and the different grinding performance of CBN grinding wheel was established according to the cross entropy principle. Finally, a large number of experiments verified the availability above mentioned estimation method. The CBN grinding wheel wear status and the remaining life of CBN grinding wheel can be monitored.

In the process of traditional classroom teaching, the classroom atmosphere is generally dull, which greatly restricts the teaching quality and learning efficiency. As the only school-enterprise cooperation major, the information security technology application major in Shandong Electric Power College, together with NARI, 360 and other companies, makes full use of existing resources and builds a classroom based on skills competition that is goal-oriented guidance, close to job requirements, competition and cooperation coexisting. Meanwhile, this paper forms a three-dimensional construction model focus on knowledge, ability and quality. Based on the three-dimensional construction model mentioned before, this paper has explored on three aspects: teaching model, combination of competition and training, and multi-level competition mechanism, which is of great significance to the construction of a vitality classroom centered on student learning.

With the rapid development of e-commerce, online shopping has gradually become the mainstream method. At the same time, the return rate of commodities is also much higher than the traditional business model, and the reverse logistics problem of e-commerce has attracted much attention. This paper discusses the cost of reverse logistics in depth and extends to the general situation, taking Jingdong Self-operated Mall as an example. Reverse logistics is more expensive, more difficult and involves more complex factors than forward logistics, making it challenging to control costs while ensuring customer satisfaction. Several solutions to the cost problem of reverse logistics are currently available in the market, but they have certain limitations and drawbacks. This paper proposes some optimization strategies, including introducing self-mailing and self-pick-up, strengthening quality inspection mechanisms, setting up specialized commodity certification and secondary sales centers, and commissioning third-party reverse logistics to improve the efficiency of reverse logistics, reducing costs, minimizing losses and regulating order. It is also recommended that the fairness and reasonableness of the platform be maintained by strengthening the audit mechanism, adjusting the return and exchange policy and taking stringent measures against negative returns.