第十八届(2022)中国·成都“阳光杯”学生新音乐作品比赛结果发布

第十八届(2022)中国·成都“阳光杯”学生新音乐作品比赛收到了来自中国、美国、法国、日本、加拿大、意大利、芬兰、希腊、澳大利亚、土耳其、以色列、捷克、斯洛文尼亚共13个国家参赛作品共计102部。参赛作品经资格审核其中有11部作品不符合比赛章程要求,因此有91部作品进入评选程序。

中国·成都2020首届华侨城黄龙溪石文化艺术博览会邀请函

黄龙溪古镇景区位于成都市双流区黄龙溪镇,黄龙溪古名"赤水",据《仁寿县志》载,载,"赤水与锦江汇流,溪水褐,江水涛,古人谓之黄龙溪清江,真龙内中藏",《隶读》著录、《黄龙甘露碑》记坛"黄龙见武阳事,铸—鼎,象龙形,沉水中……故名曰"黄龙溪"。建安24年(公元219),汉时武阳兼新津彭山之地,东县(华县)东南接壤,仁寿也象牙,黄龙所属之地.

Design and Verification for Dual⁃mode CDFS and High⁃Load Compressor with a Large Flow Regulation Range

This paper presents the design and verification of the dual-mode core driven fan stage(CDFS)and high-load compressor with a large flow regulation range.In view of the characteristics of large flow regulation range of the two modes and high average stage load coefficient,this paper investigates the design technology of the dual-mode high-efficiency compressor with a large flow regulation range and high-load compressor with an average stage load coefficient of 0.504.Building upon this research,the design of the dual-mode CDFS and four-stage compressor is completed,and three-dimensional numerical simulation of the two modes is carried out.Finally,performance experiment is conducted to verify the result of three-dimensional numerical simulation.The experiment results show that the compressor performance is improved for the whole working conditions by using the new design method,which realizes the complete fusion design of the CDFS and high-pressure compressor(HPC).The matching mechanism of stage characteristics of single and double bypass modes and the variation rule of different adjustment angles on performance are studied comprehensively.Furthermore,it effectively reduces the length and weight of compressor,and breaks through the key technologies such as high-load compressor with the average load factor of 0.504.These findings provide valuable data and a methodological foundation for the development of the next generation aeroengine.

Method for Detecting Weld Feature Size Based on Line Structured Light

With the rapid development of the machining and manufacturing industry,welding has been widely used in forming connections of structural parts.At present,manual methods are often used for welding and quality inspection,with low efficiency and unstable product quality.Due to the requirements of visual inspection of weld feature size,a visual inspection system for weld feature size based on line structured light(LSL)is designed and built in this paper.An adaptive light stripe sub-pixel center extraction algorithm and a feature point extraction algorithm for welding light stripe are proposed.The experiment results show that the detection error of the weld width is 0.216 mm,the detection error of the remaining height is 0.035 mm,the single measurement costs 109 ms,and the inspection stability and repeatability of the system is 1%.Our approach can meet the online detection requirements of practical applications.

A Robust Method for Adaptive Center Extraction of Linear Structured Light Stripe

In the non-contact measurement using the linear structured light(LSL),the extraction precision of the light stripe center directly affects the measurement accuracy of the whole detection system.To solve the problem that general algorithms cannot accurately extract the center of the light stripe with the uneven width and unstable greyvalue distribution,an adaptive optimization method is proposed.In this method,the stripe region is firstly segmented,and the widths of the laser stripe are calculated by boundary detection.The initial stripe center points are computed by the quadratic weighted grayscale centroid method based on the self-adaptive stripe width.After that,these center points are optimized according to the determined slope threshold.The sub-pixel coordinates of these center points are recalculated.Detailed analysis is also performed in line with the proposed evaluation index of the extraction algorithm.The experimental results show that the mean square error of extracted center points is only 0.1 pixel,meaning that the accuracy of laser stripe center extraction is improved significantly by the method.Furthermore,the method can run effectively at a relatively low computational time cost,and can demonstrate great robustness as well.

Study on Coaxiality Measurement System of Compound Gear Shaft Based on Non⁃contact Optic

Aiming at the shortcomings of traditional contact measurement methods such as low measurement efficiency,high cost and low accuracy,a non-contact optical measurement method based on the laser displacement sensor is proposed.According to the relevant regulations of the coaxiality error evaluation standard and the structural characteristics of the compound gear shaft,we have designed and built a set of supporting software system as well as a hardware test platform.In this paper,the distance difference threshold and scale threshold methods are used to eliminate outlier data.The least squares circle is selected to calculate the center of the circle and the minimum containment cylinder axis method is used as the reference axis of the composite gear shaft.Compensated by the standard step shaft calibration,the coaxiality error of the composite gear shaft can be measured to be within 0.01 mm in less than two minutes.The range value of the multi-section measurement test is 0.065 mm.The average coaxiality error is∅0.476 mm.

Acupoint selection rules in acupuncture therapy for postoperative urinary retention after hemorrhoidectomy based on data mining technology

Objective:To explore the core acupoints and combination rules of acupuncture therapy for postoperative urinary retention after hemorrhoidectomy,and,further to analyze the characteristics of the prescription of acupuncture therapy for postoperative urinary retention after hemorrhoidectomy.Methods:Relevant clinical studies in seven databases were searched systematically from database inception to 1 st October 2020.Based on data mining techniques,the core acupoints,characteristics and combination rules of acupuncture therapy for postoperative urinary retention after hemorrhoidectomy were analyzed comprehensively.Statistics collected and analysis of acupoint selection included the frequency of usage of acupoints,the meridian of acupoints,the location of acupoints and the combination of acupoints.Cluster and association analysis were performed utilizing Excel 13.0 and SPSS 26.0.Results:In the 36 studies included,the most frequently adopted acupoint was Sānyīnjiāo(三阴交 SP6);the most frequently adopted meridian was the foot-taiyin spleen meridian;the most frequently involved location was the lower limbs;and the most frequently adopted combination of acupoints was SP6 and Zhōngjí(中极CV 3).Cluster analysis showed that the acupoints could be divided into three categories:the first group comprised SP6 alone;the second group included CV3,Guānyuán(关元CV4),Yīnlíngquán(阴陵泉SP9) and Zúsānlǐ(足三里ST36);and the third group included Pángguāngshū(膀胱俞BL28),Chéngshān(承山BL57),Tàichōng(太冲LR3),Zhìbiān(秩边 BL54),Tàixī(太溪KI6),Hégǔ(合谷 LI4),Xuèhǎi(血海SP10),Qìhǎi(气海CV6) and Shǔidào(水道ST28).Conclusion:It was found that acupuncture therapy for postoperative urinary retention after hemorrhoidectomy mainly follows the four characteristic rules:the selection of acupoints following the meridian,selection of acupoints at local points,selection of acupoints at distal points and selection of acupoints according to special symptoms.

The meridian distribution on the lacquer figure unearthed in the Han dynasty tomb in Chengdu Laoguan mountain

In 2012,a lacquer figure was unearthed from the Han dynasty tomb(188 BC-87 BC) at Chengdu Laoguanshan.The lines intaglioed on the Laoguan mountain lacquer figure were similar to the meridians.Objective:To investigate the relationship between the lines on this Laoguanshan lacquer figure and the regular meridians so as to explore the development of meridian system in ancient China.Methods:Based on collecting the photos of the Laoguan mountain lacquer figure and the representative acupuncture classics,the double evidence method(combining the unearthed relics/literature and extant literature) was performed to investigate the relationship between the lines on this Laoguanshan lacquer figure and the regular meridians.Furthermore,the development of regular meridians theory was analyzed from the number,distribution,direction and branches.Results:The routes of the 28 longitudinal white lines on the Laoguan mountain lacquer figure are similar to the regular meridians in the ancient literature including Huángdì Nèijīng 《黄帝内经》 Yellow Emperor’s Inner Classic).The number,distribution and branches of the meridians intaglioed on the Laoguanshan lacquer figure suggested the evolution of the regular-meridian system from the eleven-meridian system to the twelve-meridian system.Conclusions:The meridian system of Laoguanshan lacquer figure was a link connecting the preceding and the following.The Laoguanshan lacquer figure played an important role in the development of the early meridian theory.

An overview of Japanese cosmetic acupuncture

Objective:To provide an overview of Japanese cosmetic acupuncture and promote its development.Methods:The study retrieved original and conference papers on cosmetic acupuncture published in the Japana Centra Revuo Medicina and summarized relevant operation techniques,indications,and other pertinent information.Results:A total of 163 related papers were retrieved,which focused on the treatment of 12 dermatological conditions including wrinkles and pigmentation.Treatment not only utilized acupuncture,but also incorporated other techniques,including cupping therapy,scraping therapy,pulse therapy,aromatherapy,exercise,and diet.All the treatments were guided either by Chinese medicine or western medicine theories.Conclusion:Cosmetic acupuncture has progressed rapidly in Japan in the past two decades and shows promising future developmental prospects.

Observation on promoting resuscitation in the patients with coma of acute carbon monoxide poisoning by acupuncture combined with hyperbaric oxygen

Objective:To evaluate the effect of promoting resuscitation and the effect differences between acupuncture combined with hyperbaric oxygen therapy(HBOT)and simple HBOT in the patients with coma of acute carbon monoxide poisoning(ACMP).Methods:A total of 36 patients with ACMP coma were randomized into a simple HBOT group and acupuncture combined with HBOT group,18 cases in each one.In the simple HBOT group,HBOT was provided once a day for 2 weeks.In the acupuncture combined with HBOT group,acupuncture was provided during HBOT.The acupuncture was given before the patients were sent to the hyperbaric oxygen chamber and the needles were retained until the hyperbaric oxygen treatment was completed.The acupoints included B?ihuì(百会 GV 20),Shuǐgōu(水沟 GV 26),Sìshéncōng(四神聪 EX-HN1),Fēngchí(风池 GB20),Hégǔ(合谷 LI 4),Tàichōng(太冲 LR 3)and Yǒngquán(涌泉 KI 1).The needles were retained through the entire process of HBOT.Such combined treatment was given once a day for 2 weeks.Before the treatment,the score of Glasgow Coma Scale(GCS)was recorded,the levels of serum interleukin-6(IL-6),interleukin-8(IL-8)and brain-derived growth factor(BDNF)were tested and the time from unconsciousness to resuscitation was recorded of the two groups.After treatment,the levels of serum IL-6,IL-8 and BDNF were tested again and the clinical therapeutic effects were evaluated.Results:At last,there were 16 cases in the simple HBOT group and 17 cases in acupuncture combined with HBOT group got resuscitation.The time from unconsciousness to resuscitation was(5.17±1.10)h in the acupuncture combined with HBOT group,which was less than(6.83±2.73)h in the simple HBOT group,indicating the significant difference in statistic(P<0.05).After treatment,the total effective rate was 94.4% in the acupuncture combined with HBOT group,which was higher than 88.9% in the simple HBOT group,indicating the significant difference in statistic(P<0.05).After treatment,the levels of serum IL-6 and IL-8 were(29.72±3.49)and(67.17±7.61)pg/mL respectively in the acupuncture combined with HBOT group,which were lower as compared with those before treatment,indicating the significant differences in statistic(both P<0.05).The level of IL-8 in the acupuncture combined with HBOT group was lower than(72.67±7.17)pg/mL in the simple HBOT group after treatment,indicating the significant difference in statistic(P<0.05).After treatment,the level of BDNF was(14.78±3.90)pg/mL in the acupuncture combined with HBOT group,higher than the level before treatment,presenting the significant difference(P<0.05),and higher than(12.93 ± 2.59)pg/mL in the simple HBOT group after treatment,presenting the significant difference in statistic(P<0.05).Conclusion:Acupuncture combined with HBOT achieves the superior effect of promoting resuscitation and the clinical therapeutic effects as compared with the simple HBOT.Such combined treatment reduces the levels of serum IL-6 and IL-8,increases the level of serum BDNF in ACMP patients,as well as plays the active role in the prevention from delayed encephalopathy after acute carbon monoxide poisoning.

A case on acupuncture for Wilson disease

Wilson disease(WD),an autosomal recessive disease with abnormal copper metabolism,is caused by mutations in the ATP7 B gene.The symptoms are characterized by liver,nervous system,and ocular manifestations related to the deposition of copper in the liver,lens nucleus,and cornea.The case reported in this article was a 30-year-old woman with high muscle tension,unable to stand or walk,low voice,and short-term memory loss.Brain MRI showed that patchy Tl,long T2 signals,and high FLAIR presented signals in the basal ganglia thalamus area,subcortex,and brain stem.Low signal shadows were presented in magnetically sensitive bilateral basal ganglia region,callus,and cerebellar dentate nucleus.Ceruloplasmin was significantly reduced.With conventional treatments by western medicine,the symptoms were not alleviated.However,after the application of acupuncture-assisted treatment,the patient is capable with self-care ability,thus a desired effect was achieved.It is therefore suggested that acupuncture shall be applied to assist the treatment of WD to relieve symptoms and help patients regain self-care ability.

A high-precision terahertz retrodirective antenna array with navigation signal at a different frequency

Future communications will provide higher transmission rates and higher operating frequencies.In addition,agile beam tracking will be an inevitable trend in technology development.The terahertz retrodirective antenna array proposed and discussed in this paper can be a better solution for agile beam tracking.The array receives a 40-GHz navigation signal and accurately retransmits a 120-GHz beam in the direction of the arrival wave.Simulation results indicate that the proposed array with a stacked sandwich structure has realized the tracking of the received wave.The scanning radiation pattern shows that the array gain is 23.87 d B at 19.9°when the incident angle is 20°with a relative error of only 0.5%,meaning that there is a lateral error of only 8.7 m at a transmission distance of 5 km.