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The process of the language acquisition of children is reflected in two aspects; language structure and pragmatic functions. Data from "The Longtime Tracing Oral Corpus of Typical Development Children" (one child; 2,367 sentences) are analyzed. This study examines the child's sentence final particle (SFP) "ba", in which we focused on the intention of this word and concluding with the core pragmatic meaning and divided the different levels of "ba". In this way, we combined the different sentence types, the intentions of utterance, and the degrees of "undetermined intention" and researched on the pragmatic function of child's SFP "ba" in order to obtain the pragmatic acquisition of "ba" at the specific development period (1;12-4;01). The acquisition and development of children's language is the result of a combination of biological factors, discourse input, and cognitive ability. Finally, the enlightenment of the research conclusions on early childhood education are pointed out.

Featured Application: This article shows the research that was conducted on the motion response patterns and computational modeling results of a submersible towed system when the cables are extended and retracted during movement. This information is advantageous for actual engineering applications, facilitating enhanced control systems for depth stability, shock resistance, approach avoidance, and collision avoidance. Furthermore, it provides theoretical justification and practical illustrations to streamline the equations of motion during composite maneuvering motions. Submersible underwater towed systems usually need to transition from steady-state motion to maneuvering motion during operation while dynamically adjusting the length of the towed cable. The lumped mass approach was employed to convert the dragged cable into a model with a concentrated mass. Analyzed utilizing a computational simulation tool, the motion response of the towed system was examined for both simple and composite maneuvering motions. By comparing the changes in tension at the end of the towed cable and the depth of the towed body motion under different motion states and cable retraction and deployment speeds, the motion response law of the system when the length of the towed cable changes during the submarine maneuver motion is obtained. The maximum tension value occurred at 1.0 m/s during the acceleration maneuver when the velocity change of the submersible ended at the same time as the cable length change. After the deployment maneuver in a circular rotating motion, the range of tension fluctuations decreased by 93%, greatly improving the stability of the towed system. An analysis was conducted to examine the impact of various motion and structural parameters on the motion response. The study revealed that the buoyancy-to-gravity ratio of the towed body, the acceleration time of the accelerated motion, and the rotational speed of the circular rotational motion had a notable influence on the outcomes. When the buoyancy-to-gravity ratio of the towed body is 1.0, the maximum tension value of the towed cable is minimized, and the depth change of the towed body is closer to 0 m. [ABSTRACT FROM AUTHOR]

This study investigated the effects of negative energy balance (NEB) on perinatal ewes, with a focus on changes in growth performance, serum biochemical parameters, rumen fermentation, ruminal bacteria composition, placental phenotype‐related indicators, and expression levels of genes related to placental function. Twenty ewes at 130 days of gestation were randomly allocated to either the positive energy balance (PEB) or NEB groups. In the experiment, ewes in the PEB group were fed the same amount as their intake during the pre‐feeding baseline period, while ewes in the NEB group were restricted to 70% of their individual baseline feed intake. The experiment was conducted until 42 days postpartum, and five double‐lamb ewes per group were selected for slaughter. The results demonstrated that NEB led to a significant decrease in body weight, carcass weight, and the birth and weaning weights of lambs (P < 0.05). Additionally, NEB caused alterations in serum biochemical parameters, such as increased non‐esterified fatty acids and β‐hydroxybutyrate levels and decreased cholesterol and albumin levels (P < 0.05). Rumen fermentation and epithelial parameters were also affected, with a reduction in the concentrations of acetic acid, butyric acid, total acid and a decrease in the length of the rumen papilla (P < 0.05). Moreover, NEB induced changes in the structure and composition of ruminal bacteria, with significant differences in α‐diversity indices and rumen microbial community composition (P < 0.05). Gene expression in rumen papilla and ewe placenta was also affected, impacting genes associated with glucose and amino acid transport, proliferation, apoptosis, and angiogenesis (P < 0.05). These findings screened the key microbiota in the rumen of ewes following NEB and highlighted the critical genes associated with rumen function. Furthermore, this study revealed the impact of NEB on placental function in ewes, providing a foundation for investigating how nutrition in ewes influences reproductive performance. This research demonstrates how nutrition regulates reproductive performance by considering the combined perspectives of rumen microbiota and placental function. [ABSTRACT FROM AUTHOR]

In this paper, we construct two high order difference schemes for semilinear fractional diffusion-wave equations by a symmetric order reduction method and standard order reduction method at first. To improve the computational efficiency, an efficient time two-grid algorithm is then proposed. The global convergence order of the two-grid schemes reaches $ O(\tau_F^2+\tau_C^4+h^2) $, where $ \tau_F $ and $ \tau_C $ represent the time-step sizes on the fine and coarse grids respectively, while $ h $ is the space-step size. Furthermore, stability and convergence analysis of the derived schemes are carefully verified by the energy method. Finally, a numerical experiment is carried out to show the effectiveness of theoretical statements. [ABSTRACT FROM AUTHOR]