Stability analysis and control technology of gob‑side entry retaining with double roadways by flling with high‑water material in gently inclined coal seam

To ameliorate the defects of insufcient support resistance of traditional roadside flling bodies for gob-side entry retaining(GER),overcome the inability to adapt to the deformation of surrounding rock,and isolate the goaf efectively,a new type of high-water material as a roadside flling body for GER technology with double roadways was proposed.The instability analysis and control technology of GER with double roadways by flling high-water material into a gently inclined coal seam were studied.The basic mechanical properties of the new high-water material were investigated through laboratory experiments,and their main advantages were identifed.The reasonable width of the roadside flling wall of a high-water material was obtained by combining ground pressure observation and theoretical calculations.The distribution characteristics of the stress and plastic zone of surrounding rock of GER after being stabilized by the disturbance of the working face were studied using numerical simulations,and the failure range of GER by flling with high-water material was revealed.Based on this,a coupling control technology of anchor cables and bolts+single props+metal mesh+anchor bolts is proposed.Through the coupling methods of arranging borehole peeping and observing the convergences of surrounding rock,the results demonstrate that GER with double roadways by flling with a 1.8-m-wide high-water material has a good control efect.The above research will play an active role in promoting the application of high-water materials in GER roadside flling.

Single-borehole measuring method for broken rock zone in gently inclined thin layer weakness structure

According to the structural characteristics of gently inclined thin layer rock mass in which lots of weak interlayer existed,the concept of gently inclined thin layer weakness structure was proposed.If single-borehole measuring method of the acoustic along the conventional arrangement mode was used in measuring the broken rock zone in this structure,the change of the relationship curves (Vp-L) between acoustic p-wave velocity (Vp) and borehole depth (L) would present the irregular feature due to the mechanical characteristics of layered rock mass and harmful effects of weak interlayers,and the scope of broken rock zone couldn't be defined quickly.Based on the analysis of the me- chanical characteristics of layered rock mass,the propagation rule of acoustic and distri- butions characteristics of plastic zone and slip zone in layered rock mass,new arrange- ment mode of acoustic measuring boreholes for broken rock zone in gently inclined thin layer weakness structure was proposed.Namely,the measuring boreholes in two sides were parallel to the strata,the measuring boreholes in the roof and floor perpendicular to the strata.Besides the controlling depth of the measuring boreholes in the scope of the large plastic zones or the large slip zones should be increased.Engineering example showed that new acoustic measuring boreholes arrangement mode had the better appli- cability and could determine the scope of the broken rock zone in the gently inclined thin layer weakness structure quickly.

基于Gentle Adaboost的气密性检测系统

差压法气密性检测易受外部因素与预设参数影响。针对问题基于集成学习建立气密性检测系统,包含传感器终端数据采集系统、人机交互界面,并用最小二乘法对传感器进行线性拟合,利用Gentle Adaboost算法寻找每轮迭代中最佳弱分类器并更新下一轮样本权重,通过集成数轮迭代中最佳弱分类器组成强分类器,对被测物的气密性能进行判断。实验结果表明:所提系统在气密性检测中的准确度、精确度与召回率皆优于传统方法与单一分类模型,准确度达到99.8%,能有效克服外部因素对检测结果的影响,提高了差压法气密性检测的准确性与稳定性。

Journey Through Zhejiang: A Tapestry of Heritage and Innovation

The moment we stepped off the plane at the Hangzhou airport,the gentle embrace of Zhejiang’s climate welcomed us,setting the stage for an extraordinary exploration of the heart of eastern China.As a journalist from Myanmar representing China Report ASEAN,my journey unfolded with the prestigious 2023 Panda Cup for Foreign Students Essay Contest awards ceremony,where a global tapestry of talent revealed itself.

Address by CAFIU President Ji Bingxuan at the Reception Hosted by CAFIU and FES

Distinguished President Martin Schulz,Dear guests,Ladies and gentlemen,Friends,Good evening!It's a great pleasure to gather with all of you at this Reception ahead of the upcoming Chinese New Year.Let me begin by extending,on behalf of the Chinese Association for International Understanding(CAFIU),a hearty welcome to President Schulz,delegation from the Friedrich Ebert Foundation(FES)and all friends present today.The visit of FES delegation is of great significance.It is the first visit to China by President Schulz as the FES President,and also the second time CAFIU receives a high-level delegation of FES in six years.

A Hidden Gem Called Changdao Breathtaking scenery and the islanders’commitment to sustainable living

Changdao Island,a hidden gem in east China’s Shandong Province,features breathtaking nature.As the sun cuddles the horizon,the island’s azure sky provides a flawless backdrop to an exquisite panorama.Jagged cliffs carved by centuries of endless waves stand guard along the shoreline,their rocky silhouettes seemingly frozen in time,summoning ancient majesty.Against this dramatic backdrop,flocks of seagulls take flight,their ivory wings catching the golden hues of the sun,creating an enchanting ballet in the sky.The air is filled with the gentle cries of these graceful birds,enhancing the island’s serenity.This harmonious blend of nature’s elements,from the sapphire sea to the towering cliffs and the mesmerizing flight of seagulls,makes Changdao Island an artistic masterpiece painted by the hand of mother nature herself.

AUnique Brocade Thangka Depicting the ETIQUETTE INTERACTIONS DURING THE MING DYNASTY

The traditional way of Chakrasamvara was typically depicted with a furrowed brow and intensescowl.However,thefigure in this Chakrasamvara Thangka instead features eyebrows resembling gentle waves and eyes that smile.Does this suggest that thedepictions of Buddha can vary significantly,reflecting different cultural interpretations or different"memes"?

Jonathan Livingston Seagull (Excerpt)

It was morning,and the new sun sparkled gold across the ripples of a gentle sea.A mile from shore a fishing boat chummed the water and the word for Breakfast Flock flashed through the air,till a crowd of a thousand seagulls came to dodge and fight for bits of food.It was another busy day beginning.

The Rise and Fall of the Minnan Dialect

The Minnan dialect,is characterized by its gentle tone and fluid rhythm.This dialect,with its rich history,has undergone significant evolution over the centuries.The earliest origins of the Minnan dialect can be traced back to the Shang Dynasty,with its development linked to the Yellow River and the Luo River basin during the Western Jin Dynasty.

《夏洛的网》中的“说”

必备好词一、轻声“说”1.whisper低声说出(常指耳语、窃窃私语)2.murmur/mutter喃喃自语(多指别人不易听到的低语)3.moan/groan/complain/grumble抱怨着说4.mumble/grunt咕哝5.gossip(对别人的隐私)说长道短6.breathe低声说7.sigh叹着气说8.in a soft/gentle/mild tone/voice用温柔的语气说9.in a whisper低声说。

Remarks of CAFIU President Ji Bingxuan at the Opening Ceremony of the Third Dialogue on Exchanges and Mutual Learning among Civilisations and the First World Conference of Sinologists

Your Excellency Vice-President Han Zheng,Your Excellency Simplice Mathieu Sarandji,Your Excellency Alice Lau Kiong Yieng,Distinguished guests,ladies and gentlemen,Friends,Good Afternoon!Today,representatives from around the world gather in Beijing to celebrate the Third Dialogue on Exchanges and Mutual Learning among Civilisations and the First World Conference ofSinologists.First of all,on behalf of the host of this event,the Chinese Association for International Understanding,please allow me to express our warm welcome and heartfelt thanks to all our friends and guests who attend this event.

Remarks of Chinese Vice-President Han Zheng at the Third Dialogue on Exchanges and Mutual Learning among Civilisations and the First World Conference of Sinologists

Distinguished guests,Ladies and gentlemen,Friends,I'm delighted to join representatives of various countries in Beijing for the Third Dialogue on Exchanges and Mutual Learning among Civilisations and the First World Conference of Sinologists.President Xi Jinping highly values exchanges and mutual understanding amongcivilisations.

Speech by Ji Bingxuan, Vice-Chairperson of the Standing Committee of the 13th National People's Congress and President of the Chinese Association for International Understanding

Distinguished delegates,Ladies and gentlemen,Friends,It gives me great pleasure to gather with you in Tunisia, the Pearl of the Mediterranean Sea, to launch the dialogues on exchanges and mutual learning among civilisations, boost mutual learning and enhance the deep friendship between China and Tunisia.

Address by Ji Bingxuan,Vice-Chairperson of the Standing Committee of the 13th National People's Congress of China and President of the Chinese Association for International Understanding(CAFIU)

Distinguished guests,Ladies and gentlemen,friends,I feel so delighted to meet with all of you on this beautiful autumn day in the central plain of China while attending the Third Silk Road NGO Cooperation Network Forum and jointly contributing to people-to-people exchanges and cooperation under the Belt and Road Initiative.

Address by Ji Bingxuan,Vice-Chairperson of the Standing Committee of the 13th National People's Congress of China and President of the Chinese Association for International Understanding

Distinguished guests,Ladies and gentlemen,friends:Good morning!It is a great pleasure to join all of you in my hometown,Henan Province,to attend the opening ceremony of the Civilisation Lecture.As the cradle of the Chinese civilisation,Henan was endowed with numerous historic treasures.

Double Delight China’s ‘Super Golden Week’ brings lively tapestry of tourism

Travelling in China,especially during the annual National Day holiday,also known as Golden Week,offers an unmissable spectacle-the travellers themselves.This time of year,bathed in the gentle embrace of early autumn,boasts delightful weather and offers the gift of an extended holiday,beckoning people outdoors.With China’s vast population,as people from all walks of life set forth on their trips,the fascinating panorama of bustling crowds becomes an integral part of the travel experience.

长脉冲可调脉宽Gentle YAG 1064nm激光治疗颌面部血管瘤113例效果评估

目的:长脉冲可调脉宽GentleYAG1064nm激光是新问世的医疗激光设备,探讨用其治疗颌面部血管瘤113例,对其效果进行评估。方法:自2005年4月至8月,应用美国Candela激光公司生产的GentleYAG1064nm激光治疗口腔颌面部血管瘤113例。采用最小激光凝固剂量方法,激光能量参数为170～240J/cm2,光斑直径1.5mm,脉宽30￣60ms。激光脉冲前动态冷却(DCD)10～20次,脉冲后DCD10～15次。疗程1￣2个(9例为2个疗程,104例1个疗程)。随访3￣6个月,随访率96%。结果:全部病灶清除85例,占75.22%;有效清除(50%￣75%病灶清除)28例,占24.78%;部分清除(病灶清除<50%)0例,无效率为0。伴色素沉着11例(9.73%),色素脱失2例(1.77%),色素改变均自然恢复,历时4￣5个月。瘢痕7例,占6.19%。结论:长脉冲GentleYAG1064nm激光小剂量照射是口腔颌面部血管瘤治疗的有效手段,具有起效快、疗程短、副作用小的显著优点,宜推广应用。

基于Gabor小波的火灾烟气识别新方法

研究提出一种基于Gabor小波的火灾烟气模型,以提高基于视频图像的火灾烟气检测的准确性。本文采用混合高斯模型与色度方差相结合的方法定位火灾烟气目标区域,并基于Gabor小波对烟气纹理及边缘特征进行描述,从而提出烟气变化能量模型与方向角分布模型来分析纹理变化的动态性质。最后采用Gentle Boosting设计分类器对模型特征进行分类与匹配,并实现在训练的同时进行最优特征选择。与传统方法相比,基于本文方法的火灾烟气检测在降低漏报率与误报率方面拥有更好的性能。

基于改进AdaBoost算法的人耳检测与跟踪

人耳检测是人耳识别系统的第一个环节.在比较已有的人耳检测方法的基础上,介绍了一种复杂背景下的快速人耳检测与跟踪的方法.该方法主要分为两个阶段,离线级联分类器训练阶段和在线检测阶段.在离线训练阶段,首先结合人耳轮廓清晰,凹凸有致的特点,采用扩充后的haar-like型特征,依最近邻法则构造出弱分类器空间,然后根据经验选择GAB算法训练出强分类器,最后将多个强分类器级联成多层人耳检测器.在线检测阶段,为提高检测率,本文采用了调整分类器阈值和缩放检测子窗口的策略.最终检测器在CAS-PEAL人脸库上测试,检测率达到98%以上;在PⅣ1.7GHz的PC上对普通CMOS摄像头输入的320×240dpi视频进行人耳跟踪,速度可达6～7fps.实验结果表明,本文的人耳检测方法具有较好的实时性和一定的鲁棒性.