Vernonia anthelmintica (L.) Willd. is a traditional medicinal herb in Chinese medicine, extensively used by various ethnic groups due to the numerous advantages derived from its total flavonoids. These benefits encompass anti-inflammatory and antioxidant effects, promotion of melanin production, showcasing significant efficacy addressing vitiligo. To improve transdermal absorption enhance effectiveness treatment, ethosome containing flavonoids were prepared utilizing ultrasound injection...

With the increasing proportion of new energy power generation access in system, making to weak AC grid scenarios local areas, bringing problems stable operation grid. Multiple renewable stations short-circuit ratio,(MRSCR) is an important index measure support strength and configuration storage can not only enhance flexibility security stability system operation, but also has a great significance MRSCR. Firstly, basic structure establishment electromechanical transient simulation model are...

Pneumatic drive has the advantage of flexible contact, widely used in large-diameter complex optical surface element processing device drive. Polishing is core step machining process elements. The high-precision control contact force between polishing and directly affects accuracy element. current research on strategy does not fully consider constraints pneumatic system saturation cylinder as an actuating element, which cannot further improve response speed algorithm. In view above problems,...

Community-acquired pneumonia (CAP) is the most common form of in pregnancy and may lead to severe adverse maternal fetal outcomes. Severe CAP (SCAP) defined as need for invasive mechanical ventilation with septic shock vasopressors. This study aimed analyze clinical characteristics factors associated SCAP pregnancy. The present was a case-control pregnant women hospitalized between September 2012 2017 at nine tertiary hospitals China. Among 358,424 women, we found 35 cases 393 cases. were...

This paper proposes a variable-power-tracking-operation-based frequency regulation scheme for wind turbine generator (WTG) that employs frequency-excursion-based control parameter to suppress excursion under various speeds and disturbances. To this end, an improved system response model is built, then the characteristics of WTG are investigated. The determined. Simulations based on Matlab/Simulink simulator verify effectiveness proposed strategy. simulation results clearly indicate suggested...

ObjectiveTo validate the feasibility of ultrasound in assessing curative effect botulinum toxin type A (BTXA) treating hypertrophic scar (HS).MethodsEight healthy New Zealand long-eared rabbits were utilized study. Four wounds, each measuring 1.0 cm diameter, created on both ears rabbit. Immediately after surgery, these wounds received an injection containing a distinct concentration BTXA. On postoperative week 6, thickness, vascularity, and hardness assessed based high frequency (HFUS),...

Methane gas injected into reservoirs can greatly enhance oil recovery and has been widely used. However, continuous methane flooding a deleterious effect on enhancement easily causes channeling in low-permeability heterogeneous because of the low viscosity high mobility gas. This study consists comprehensive experimental research that combines physical simulation saturation dynamic monitoring technologies with component analysis produced to investigate control effects cores. First,...

The main aim of this paper is to develop the basic theory a class infinite dimensional stochastic differential equations with delays (IDSDEs) under local Lipschitz conditions. Firstly, we establish global existenceuniqueness theorem for IDSDEs condition in <i>C</i> without linear growth condition. Secondly, non-continuable solution given <i>C</i>. Then, classical It&#265;'s formula improved and existence obtained. Our new theorems give better results while conditions imposed are much weaker...

The braiding quality of composite preforms has a significant influence on their mechanical properties. To address the difficulties in design processing technology and stability surface fabric during process spatial special-shaped mandrel, robot control method was proposed for prefabrication. Regarding branding formed body inspection angle by machine vision control, this study mandrel discretized, position attitude tool center point were calculated, pulling speed calculated. calculation...

Aroma components from the ripe fruit of Prunus salicina L. cv. Friar and their changes during cold storage were analyzed in this study. Fifty-one volatiles identified by dichloromethane direct extraction method using gas chromatography–mass spectrophotometry (GC-MS). Their total content was 50.4 μg/g, including alcohols, aldehydes, esters, lactones, acids, ketones, phenols, small amounts hydrocarbons heterocyclic compounds. Nine compounds determined as would-be impact odorants Friar,...

The possibility of a life prediction model for nickel-base single crystal blades has been studied. fatigue-creep (FC) and thermal fatigue-creep(TM FC) as well creep experiments have carried out with different hold time DD3. the frequency temperature range are main factors influencing life. An emphasis put on micro mechanism rupture creep, FC TMFC Two voiding degeneration material experiments. There voids in fracture surfaces, size is dependent loading condition. Generally, same TMFC. If can...

To quickly evaluate the material properties of ancient wooden structure members on site, larch species northeastern China was used as research object, and nondestructive testing method stress wave micro-drill resistance meter were to measure it. The variation laws wood’s cross longitudinal property indexes determined. According law indexes, detection divisions under technology instruments divided, which provides a basis for improving accuracy on-site testing. From comparison shade light side...

Brain-Computer Interface (BCI) technology can record spike signals and local field potential (LFP). The research on have achieved results, but the effect of recording will still decrease over time. LFP signal stably for a long time make up deficiency alone. This paper took rats as its object researched primary motor cortex after gait training. Meanwhile, are collected. Based data, rats' "running" "standing" motion states divided. corresponding periods determined to obtain in different...

This paper firstly analyzes the difference between high-frequency synthetic aperture radar (SAR) and low-frequency ultra-wide band (UWB SAR) in extraction of multiresolution feature. And then we establish equivalent models target trunk clutter UWB SAR images analyze differences characteristic as image resolution is varied from fine to course. Two forms first-order autoregression (AR) model are introduced sequences, a two-dimensional (2-D) definition generalized likelihood ratio (GLR)...

在合成孔径雷达(SAR)目标检测中，目前采用的变化检测算法主要包括构造似然比法和最小二乘图像相减法，这两种算法在实际变化检测中分别存在如下问题：构造似然比法需要目标、杂波及噪声充分的先验知识，而最小二乘图像相减法则存在稳健性差的问题，鉴于上述问题，该文提出一种稳健可行的变化检测算法，该算法在最小二乘图像相减法的基础上引入了误差影响因子，通过迭代的方法求取待定参数，大大提高了变化检测的稳健性，文章最后基于不同算法进行了变化检测试验，试验结果进一步证明了该文提出算法的稳健性。