元宇宙创新发展提升人民城市生活“四感”

党的二十大报告明确提出实现城市治理现代化的民生逻辑:“坚持人民城市人民建、人民城市为人民。”随着工信部等五部门联合印发《元宇宙产业创新发展三年行动计划(2023-2025年)》,上海全面展开元宇宙新赛道布局,积极提升人民城市生活“四感”--参与感、获得感、幸福感、安全感。

“四感”赋能团队,促进园所发展

在当今竞争激烈的教育环境中,幼儿园要想脱颖而出,不仅需要拥有先进的教学理念和优质的教育资源,更需要拥有一支充满激情与活力的团队。本文将目光聚焦于“四感”-使命感、参与感、仪式感、危机感,深入剖析它们在助力幼儿园团队建设中发挥的独特价值,以及在促进园所全面发展中起到的重要作用。

中职高品质课堂应关注“四感”

近年来,国家出台一系列重大政策以推动职业教育改革发展,“三教”改革成为高频出现的一个关键词,而课堂又成为改革最终的聚焦点和落脚点。中职学校要打造高品质课堂,必须坚持以人为本,围绕学生的成长展开教学,尤其要在课堂教学中关注学生的“四感”。

点燃“四感”,照亮中职生化学学习的上升通道

中职化工专业学生受多种因素影响,对化学学习不感兴趣,学习效果欠佳。为改变这种学习现状,教师可通过工匠精神的培养,让学生认可职业教育;利用生产生活实践,让学生理解化学化工的意义;运用激励和温故策略,树立学生学习信心;开展理实一体化教学,点燃学生化学探索热情,照亮学生化学学习的上升通道。

巧用“四感”促进随文练笔

本文作者在长达10多年的小学高年级语文教学中，长期实践“读写结合”，让“读”“写”水乳交融地结合在一起，追求有效且高效的语文课堂。那么，“写”到底应该如何挤进小学高年级阅读教学的课堂？本文作者试图通过巧用“四感”，即感触、感悟、感动、感觉来促进小学生高年级随文练笔水平的提高。

新时代基层人大代表履职“四感”浅探

聚焦基层人大代表履职中存在的问题,据此提出切实可行的政策建议,对充分发挥新时代基层人大代表职能、坚持和完善人民代表大会制度具有重要意义。新时代基层人大代表履职时必须处理好“开会代表”还是“全天候代表”、“本位代表”还是“格局代表”、“发言代表”还是“建言代表”等问题,关键需要地方人大及其常委会进一步强化基层代表的履职“四感”,即“压力感”“尊崇感”“方便感”和“成就感”,用法治保障人民权益、增进民生福祉,更好助力经济社会发展和改革攻坚任务。

“四感”下的《小仓百人一首》分析

对于每位中国儿童来说,《唐诗三百首》是必读的经典,日本也有一本诗歌集如《唐诗三百首》一般在诗歌史中占据着极其重要的地位,即《小仓百人一首》。该诗歌集由镰仓时代的歌人藤原定家汇编而成,藤原定家是日本诗歌集的集大成者。从视觉、听觉、嗅觉、触觉等角度对该诗歌集进行分类分析,能够更全面地认识日本诗歌的风格以及诗歌背后所隐藏的社会背景。

以党的二十大精神为引领注重从“四感”激发官兵强军动力

习近平主席指出:“当前和今后一个时期,学习宣传贯彻党的二十大精神是全党全国全军的首要政治任务。全军要认真贯彻党中央部署,精心筹划组织,把学习宣传贯彻党的二十大精神这件大事抓紧抓好抓出成效。”基层部队在学习宣传贯彻党的二十大精神系列活动中,应紧密结合单位实际和官兵思想状况,采取多种形式,进一步从荣誉感、价值感、方向感、幸福感四个角度激发官兵强军动力。

美育融入信息技术课堂的教学实践——以“巧用循环结构进行创意图案的设计”一课为例

将美育融入信息技术课堂,充分挖掘信息技术学科中的美育元素,运用美学原理,将美感培育与适合学生主动参与、互动发展的课堂教学结构结合起来,能促使学生在情境中互动,在互动中体验,在体验中感悟,在感悟中创造。本文从情境创设欣赏美、模仿实践体验美,到自主创作创造美,铸就了美感课堂,以美启智。

Algorithm for reconstructing compressed sensing color imaging using the quaternion total variation

A new method for reconstructing the compressed sensing color image by solving an optimization problem based on total variation in the quaternion field is proposed, which can effectively improve the reconstructing ability of the color image. First, the color image is converted from RGB （red, green, blue） space to CMYK （cyan, magenta, yellow, black） space, which is assigned to a quaternion matrix. Meanwhile, the quaternion matrix is converted into the information of the phase and amplitude by the Euler form of the quatemion. Secondly, the phase and amplitude of the quatemion matrix are used as the smoothness constraints for the compressed sensing （CS） problem to make the reconstructing results more accurate. Finally, an iterative method based on gradient is used to solve the CS problem. Experimental results show that by considering the information of the phase and amplitude, the proposed method can achieve better performance than the existing method that treats the three components of the color image as independent parts.

The development of a knowledge base in an expert system based on the four-layer perceptron neural network

Owing to continuous production lines with large amount of consecutive controls, various control signals and huge logistic relations, this paper introduced the methods and principles of the development of knowledge base in a fault diagnosis expert system that was based on machine learning by the four-layer perceptron neural network. An example was presented. By combining differential function with not differential function and back propagation of error with back propagation of expectation, the four-layer perceptron neural network was established. And it was good for solving such a bottleneck problem in knowledge acquisition in expert system and enhancing real-time on-line diagnosis. A method of synthetic back propagation was designed, which broke the limit to non-differentiable function in BP neural network.

Dark Touristic Perception: Motivation, Experience and Benefits Interpreted from the Visit to Seismic Memorial Sites in Sichuan Province

This study investigates the motivations of Chinese domestic tourists visiting seismic memorial sites after the great Wenchuan earthquake of 2008, and examines their interpretation of experiences and benefits of the visits. Recent research on dark tourism has raised the possibility that people are attracted to death and memorial sites in ways different from other tourist attractions. The study used an empirical research design employing questionnaires to collect data from 255 Chinese domestic visitors at seismic memorial sites in west Sichuan. Analysis revealed that the obligation of commemoration mixed with curiosity represents a different set of travel motivation in dark tourism settings than in other kinds of tourism. In addition, the empirical evidence also suggests an interrelated pattern between motivations, experiences and benefits. This study implies that Chinese domestic tourists were attracted in ways different from other tourist attractions both because they tended to fulfill their obligation of commemoration and were interested in destruction; and visitor experiences played an important mediating role between travel motivations and benefits gained.

L_1-norm minimization for quaternion signals

An algorithm for recovering the quaternion signals in both noiseless and noise contaminated scenarios by solving an L1-norm minimization problem is presented. The L1-norm minimization problem over the quaternion number field is solved by converting it to an equivalent second-order cone programming problem over the real number field, which can be readily solved by convex optimization solvers like SeDuMi. Numerical experiments are provided to illustrate the effectiveness of the proposed algorithm. In a noiseless scenario, the experimental results show that under some practically acceptable conditions, exact signal recovery can be achieved. With additive noise contamination in measurements, the experimental results show that the proposed algorithm is robust to noise. The proposed algorithm can be applied in compressed-sensing-based signal recovery in the quaternion domain.

Effect of WeiJia on carbon tetrachloride induced chronic liver injury

AIM： To study the effect of WeiJia on chronic liver injury using carbon tetrachloride （CCh） induced liver injury animal model. METHODS： Wistar rats weighing 180-220g were randomly divided into three groups： normal control group （Group A）, CCh induced liver injury control group （Group B） and CCI4 induction with WeiJia treatment group （Group C）. Each group consisted of 14 rats. Liver damage and fibrosis was induced by subcutaneous injection with 40% CCh in olive oil at 3 mL/kg body weight twice a week for eight weeks for Groups B and C rats whereas olive oil was used for Group A rats. Starting from the third week, Group C rats also received daily intraperitoneal injection of Wei.lia at a dose of 1.25 μg/kg body weight. Animals were sacrificed at the fifth week （4 male, 3 female）, and eighth week （4 male, 3 female） respectively. Degree of fibrosis were measured and serological markers for liver fibrosis and function including hyaluronic acid （HA）, type Ⅳ collagen （CIV）, γ-glutamyl transferase （γ-GT）, alanine aminotransferase （ALT） and aspartate aminotransferase （AST） were determined. Alpha smooth muscle actin （α-SMA） and proliferating cell nuclear antigen （PCNA） immunohistochemistry were also performed. RESULTS： CCl4 induction led to the damage of liver and development of fibrosis in Group B and Group C rats when compared to Group A rats. The treatment of WeiJia in Group C rats could reduce the fibrosis condition significantly compared to Group B rats. The effect could be observed after three weeks of treatment and was more obvious after eight weeks of treatment. Serum HA, CIV,ALT, AST and γ-GT levels after eight weeks of treatment for Group C rats were 58±22 μg/L （P〈0.01）, 57±21 μg/L （P〈0.01）, 47±10 U/L （P〈0.01）, 139±13 U/L （P〈0.05） and 52±21 U/L （P〉0.05） respectively, similar to normal control group （Group A）, but significantly different from CCh induced liver injury control group （Group B）. An increase in PCNA and decrease in α-SMA expression level was also observed. CONCLUSION： WeiJia could improve liver function and reduce liver fibrosis which might be through the inhibition of stellate cell activity.

Investigation and Assessment of Landslides and Debris Flows in Sichuan Province of China by Remote Sensing Technique

Taking TM images, ETM images, SPOT images, aerial photos and other remote sensing data as fundamental sources, this research makes a thorough investigation on landslides and debris flows in Sichuan Province, China, using the method of manual interpretation and taking topography maps as references after the processes of terrain correction, spectral matching, and image mosaic. And then, the spatial characteristics of landslides and debris flows in the year of 2005 are assessed and made into figures. The environmental factors which induce landslides and debris flows such as slope, vegetation coverage, lithology, rainfall and so on are obtained by GIS spatial analysis method. Finally, the rela- tionships of landslides or debris flows with some environmental factors are analyzed based on the grade of each envi- ronmental factor. The results indicate: 1) The landslides and debris flows are mainly in the eastern and southern area of Sichuan Province, however, there are few landslides and debris flows in the western particularly the northwestern Si- chuan. 2) The landslides and debris flows of Sichuan Province are mostly located in the regions with small slope degree. The occurring rate of debris flow reduces with the increase of the vegetation coverage degree, but the vegetation cov- erage degree has little to do with the occurrence of landslide. The more rainfall a place has, the easier the landslides and debris flows take place.

A Remote Sensing-based Analysis on the Impact of Wenchuan Earthquake on the Core Value of World Nature Heritage Sichuan Giant Panda Sanctuary

In this study,we used remotely sensed data,GIS modeling,and statistical methods to evaluate the damage caused by the Wenchuan Earthquake (May 12,2008) to the giant panda (Ailuropoda melanoleuca) habitat in the World Nature Heritage Sichuan Giant Panda Sanctuary (WHSGPS) in China.A landscape ecological analysis found increases of landscape heterogeneity,complexity,and fragmentation in the giant panda habitat after the earthquake.A terrain analysis found that slope and elevation are directly associated with the distribution of the damaged areas.As slope and elevation increase,the size of the damaged area keeps increase until to a peak,and then starts to drop.The total area of the damaged vegetation in our study area is 114.26 km 2,accounting for 3.78% of the study area;30.46% of that 114.26 km 2 is located in the Core Zone of WHSGPS.There are 18.57km 2 of the damaged vegetation located in the identified suitable giant panda habitat,accounting for 1.75% of the total area of suitable giant panda habitats in the study area.Based on these findings,we conclude that the Wenchuan Earthquake does not have significant impact on the WHSGPS as a whole.

Preparation and Characterization of Tungsten-substituted Molybdophosphoric Acids and Catalytic Cyclodehydration of 1,4-Butanediol to Tetrahydrofuran

A series of tungsten-substituted molybdophosphoric acids(H3PMo12-nWnO40·xH2O) were synthesized and characterized by inductive coupled plasma atomic emission spectroscopy(ICPAES),thermal gravimetry and differential scanning calorimetry(TG-DSC),Fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),and FTIR pyridine adsorption.The as-prepared heteropoly acids have a Keggin type structure.The synthesis of tetrahydrofuran by reactive distillation and cyclodehydration of 1,4-butanediol was studied using the tungsten-substituted molybdophosphoric acids as catalysts.The results of catalytic test indicated that the catalytic activity increased with the increase in the substitution number(n) of tungsten atom in H3PMo12-nWnO40·xH2O and was constant as the substitution number(n) was more than 8.The catalytic activity increased with the increase in the catalyst loading and the selectivity of tetrahydrofuran was nearly 100%.

Accuracy Analysis on Bundle Adjustment of Remote Sensing Images Based on Dual Quaternion

A bundle adjustment method of remote sensing images based on dual quaternion is presented,which conducted the uniform disposal corresponding location and attitude of sequence images by the dual quaternion.The constraint relationship of image itself and sequence images is constructed to compensate the systematic errors.The feasibility of this method used in bundle adjustment is theoretically tested by the analysis of the structural characteristics of error equation and normal equation based on dual quaternion.Different distributions of control points and stepwise regression analysis are introduced into the experiment for RC30 image.The results show that the adjustment accuracy can achieve 0.2min plane and 1min elevation.As a result,this method provides a new technique for geometric location problem of remote sensing images.

Debris Flow Susceptibility Assessment Using a Probabilistic Approach:A Case Study in the Longchi Area, Sichuan Province, China

The Longchi area with the city of Dujiangyan, in the Sichuan province of China, is composed of Permian stone and diorites and Triassic sandstones and mudstones intercalated with slates. An abundance of loose co-seismic materials were present on the slopes after the May 12, 2008 Wenchuan earthquake, which in later years served as source material for rainfall-induced debris flows or shallow landslides. A total of 48 debris flows, all triggered by heavy rainfall on 13th August 20l0, are described in this paper. Field investigation, supported by remote sensing image interpretation, was conducted to interpret the co-seismic landslides in the debris flow gullies. Specific characteristics of the study area such as slope, aspect, elevation, channel gradient, lithology, and gully density were selected for the evaluation of debris flow susceptibility. A score was given to all the debris flow gullies based on the probability of debris flow occurrence for the selected factors. In order to get the contribution of the different factors, principal component analyses were applied. A comprehensive score was obtained for the 48 debris flow gullies which enabled us to make a susceptibility map for debris flows with three classes. Twenty-two gullies have a high susceptibility, twenty gullies show a moderate susceptibility and six gullies have a low susceptibility for debris flows.

Crack Quantification of Bolted Joints by Using a Parallelogram Eddy Current Array Sensing Film

Crack monitoring at the bolt hole edge is one of the important focuses of aircraft structural health monitoring.In this study,a novel eddy current sensing film based on a parallelogram coil array is developed to quantitatively monitor the crack characteristics near the bolt hole with fewer layers and coils,compared with the existing methods.The parallelogram coil array configuration is designed and optimized to improve the quantitative monitoring ability of the crack.A 3×3 parallelogram coil array is used to quantify the crack parameters of aluminum bolted joints.Finite element simulation and experiments show that the proposed parallelogram coil array could not only accurately and quantitatively identify the crack angle at the edge of the bolt hole,but also track the crack length along the radial direction of the bolt hole and the depth along the axial direction.