The application of light hydraulic support highlights the advantages of longwall top-coal caving (LTC) in thinner thick-seams (3. 0~ 5. 0 m). Considering the problems in practice, the developing of its new series will...The application of light hydraulic support highlights the advantages of longwall top-coal caving (LTC) in thinner thick-seams (3. 0~ 5. 0 m). Considering the problems in practice, the developing of its new series will promote the mining of LTC with light hydraulic supports. Some relevant technical problems of the caving technology and the future of this series of supports are analyzed in this paper with several new opinions.展开更多
According to the geological and mining technical conditions of No.18128 sub- level caving face with suspend-shift support,the first working face of the working area,the distribution laws of abutment pressure were stud...According to the geological and mining technical conditions of No.18128 sub- level caving face with suspend-shift support,the first working face of the working area,the distribution laws of abutment pressure were studied by jointly employing FIAC^(3D) numerical simulations and field tests.With the full consideration of these laws and the service time- limit of the mining district,the optimal location of the terminal mining line,should be 60 m away from the W4-B8 track dip,which was 20 m shorter than the 80 m distance deter- mined according to traditional experiences.The retained coal safety pillar for the protect- ing of dips,already proved by the industrial practice,can not only improve the rate of coal recovery and satisfy the subsequent service requirement for the following working faces, but also decrease the maintaining expenditure and thus increase profits.展开更多
As the number of diagnostic and therapeutic gastrointestinal endoscopies is increasing, and there is an increase in number of patients taking blood thinners, we are seeing more and more patients on blood thinners prio...As the number of diagnostic and therapeutic gastrointestinal endoscopies is increasing, and there is an increase in number of patients taking blood thinners, we are seeing more and more patients on blood thinners prior to endoscopic procedures. Gastrointestinal bleeding or thromboembolism can occur in this category of patients in the periendoscopic period. To better manage these patients, endoscopists should have a clear concept about the various blood thinners in the market. Patients’ risk of thromboembolism off anticoagulation, and the risk of bleeding from endoscopic procedures should be assessed prior to endoscopy. The endoscopic procedure should be done when it is safe to do it.展开更多
话题是人们的体形。市面上琳琅满目的减肥药物和运动器械折射出人们“喜瘦怕胖”的心态。可有些人怎么减肥也收效不大,于是对药物减肥法产生怀疑,相继提出了“运动减肥论”和“基因决定论”,在以上各家争执不下时,本文却另辟蹊径,提出...话题是人们的体形。市面上琳琅满目的减肥药物和运动器械折射出人们“喜瘦怕胖”的心态。可有些人怎么减肥也收效不大,于是对药物减肥法产生怀疑,相继提出了“运动减肥论”和“基因决定论”,在以上各家争执不下时,本文却另辟蹊径,提出了“非锻炼性运动产热减肥论”。这个拗口的名字来源于non-exercise actvity thermogenesis.简称NEAT。文章特别强调,这种运动不同于一般的体育运动,而是如题目所言的little daily habits,象 fidgeting, stretching, toe-tapping等。不要以为这些“小动作”不起眼,据科学实验.NEAT proved to be theprincipal mediator of resistance to fat gain with overfeeding。其作用竟然大大超过另外三种耗能方式(详见下文)。包括体育运动。最后的结论是:…higherlevels of fidgeting and other non-exercise movements may be a key factor indetermining which of us gain weight easily。 遗憾的是连专家们也弄不清这种消耗能量的方式为什么会有个体差异,但全文从头至尾似于一直在暗示读者:NEAT并非先天注定,而是可以逐步培养的习惯。那么,受身体发福困扰的朋友不妨拿出一点决心和恒心,试试这些“小动作”。展开更多
文摘The application of light hydraulic support highlights the advantages of longwall top-coal caving (LTC) in thinner thick-seams (3. 0~ 5. 0 m). Considering the problems in practice, the developing of its new series will promote the mining of LTC with light hydraulic supports. Some relevant technical problems of the caving technology and the future of this series of supports are analyzed in this paper with several new opinions.
基金the National Natural Science Foundation of China(50674002)the Educational Department of Anhui Province(KJ2008B109)
文摘According to the geological and mining technical conditions of No.18128 sub- level caving face with suspend-shift support,the first working face of the working area,the distribution laws of abutment pressure were studied by jointly employing FIAC^(3D) numerical simulations and field tests.With the full consideration of these laws and the service time- limit of the mining district,the optimal location of the terminal mining line,should be 60 m away from the W4-B8 track dip,which was 20 m shorter than the 80 m distance deter- mined according to traditional experiences.The retained coal safety pillar for the protect- ing of dips,already proved by the industrial practice,can not only improve the rate of coal recovery and satisfy the subsequent service requirement for the following working faces, but also decrease the maintaining expenditure and thus increase profits.
文摘As the number of diagnostic and therapeutic gastrointestinal endoscopies is increasing, and there is an increase in number of patients taking blood thinners, we are seeing more and more patients on blood thinners prior to endoscopic procedures. Gastrointestinal bleeding or thromboembolism can occur in this category of patients in the periendoscopic period. To better manage these patients, endoscopists should have a clear concept about the various blood thinners in the market. Patients’ risk of thromboembolism off anticoagulation, and the risk of bleeding from endoscopic procedures should be assessed prior to endoscopy. The endoscopic procedure should be done when it is safe to do it.
文摘话题是人们的体形。市面上琳琅满目的减肥药物和运动器械折射出人们“喜瘦怕胖”的心态。可有些人怎么减肥也收效不大,于是对药物减肥法产生怀疑,相继提出了“运动减肥论”和“基因决定论”,在以上各家争执不下时,本文却另辟蹊径,提出了“非锻炼性运动产热减肥论”。这个拗口的名字来源于non-exercise actvity thermogenesis.简称NEAT。文章特别强调,这种运动不同于一般的体育运动,而是如题目所言的little daily habits,象 fidgeting, stretching, toe-tapping等。不要以为这些“小动作”不起眼,据科学实验.NEAT proved to be theprincipal mediator of resistance to fat gain with overfeeding。其作用竟然大大超过另外三种耗能方式(详见下文)。包括体育运动。最后的结论是:…higherlevels of fidgeting and other non-exercise movements may be a key factor indetermining which of us gain weight easily。 遗憾的是连专家们也弄不清这种消耗能量的方式为什么会有个体差异,但全文从头至尾似于一直在暗示读者:NEAT并非先天注定,而是可以逐步培养的习惯。那么,受身体发福困扰的朋友不妨拿出一点决心和恒心,试试这些“小动作”。
