To explore the distribution of and the mechanical properties(compressive strength)of the hardened body of alkali slag-fly ash cementitious materials,this study was conducted by using the XRD,FTIR,SEM/EDS,and other tes...To explore the distribution of and the mechanical properties(compressive strength)of the hardened body of alkali slag-fly ash cementitious materials,this study was conducted by using the XRD,FTIR,SEM/EDS,and other test methods in three conditions:airtight drying(AD),airtight immersion(AI),and airtight soaking(AS).The 1D distribution law of free of hardened body under standard curing conditions was explored.The experimental results show that under standard curing conditions,the 1D distribution of within 0d-3 d shows a∨-shaped distribution,within 3-7 d show a∧-shaped distribution,and within 7-28 d tends to be balanced.The test results of leaching rate show that the free was the most stable under AD conditions and the hardened body bound the most by XRD,FTIR and SEM/EDS.And the compressive strength of the hardened body was the highest.The compressive strength of 28th reached 95.9 MPa.The definite distribution of provides an important reference for the strength development and durability evaluation of the hardened body of alkaliexcited cementitious materials.展开更多
目的探讨健脾消痰方结合常规减肥措施治疗脾虚痰湿型肥胖症临床效果。方法按照随机数表法将92例脾虚痰湿型肥胖症患者分成对照组和观察组,各46例。对照组采用调整饮食生活方式减肥方法,观察组在对照组常规减肥措施基础上联合健脾消痰方...目的探讨健脾消痰方结合常规减肥措施治疗脾虚痰湿型肥胖症临床效果。方法按照随机数表法将92例脾虚痰湿型肥胖症患者分成对照组和观察组,各46例。对照组采用调整饮食生活方式减肥方法,观察组在对照组常规减肥措施基础上联合健脾消痰方治疗。观察2组治疗前后临床症状积分(食少纳呆、脘腹痞闷、头身困重、大便溏泄)、身体质量指数(BMI)、腰围、臀围、空腹血糖(FBG)、餐后2 h血糖(2 hFBG)、血清总胆固醇(TC)、三酰甘油(TG)、低密度脂蛋白(LDL-C)、高密度脂蛋白(HDL-C)、白细胞介素1β(IL^(-1)β)、白细胞介素6(IL-6)、肿瘤坏死因子α(TNF-α)水平变化情况,并比较2组治疗总有效率及安全性。结果观察组治疗后BMI、腰围、臀围、FBG、2 h FBG、TG、TC、LDL-C水平,IL-6、IL^(-1)β、TNF-α水平均低于对照组(P<0.05),HDL-C水平、治疗总有效率均高于对照组(P<0.05);2组均无明显用药不良反应发生。结论健脾消痰方结合常规减肥措施治疗脾虚痰湿型肥胖症疗效确切,安全有效,能够有效调节糖脂代谢紊乱,抑制炎性因子表达,减轻肥胖程度。展开更多
为了控制涡轮叶顶间隙泄漏流以改善叶顶区域的流动状况,提出了机匣周向槽造型方法。以典型跨声速涡轮级(Thermal Turbomachinery and Machine Dynamics,TTM)模型为对象,研究了不同高度的机匣周向槽造型对涡轮叶顶流动结构和气动特性的...为了控制涡轮叶顶间隙泄漏流以改善叶顶区域的流动状况,提出了机匣周向槽造型方法。以典型跨声速涡轮级(Thermal Turbomachinery and Machine Dynamics,TTM)模型为对象,研究了不同高度的机匣周向槽造型对涡轮叶顶流动结构和气动特性的影响。结果表明,引入机匣周向槽造型后,近叶顶涡系结构发生了显著变化,叶顶泄漏涡(TLV)分为前后两部分,TLV-1穿过上通道涡(UPV)并逐渐被消耗,TLV-2则在周向槽之后重新形成并发展至尾缘,导致TLV的强度减弱,尺度减小。此外,由于周向槽的卷吸削弱了马蹄涡压力侧分支(HVP)的强度,加上TLV-1的压制和消耗,UPV更为远离机匣,与TLV的交互作用减弱,其强度减弱,尺度减小。总体而言,随着造型高度增大,叶顶间隙泄漏率逐渐减小,涡轮级总静效率先增大后减小。相比于无周向槽设计,当造型高度为2倍叶顶间隙时,叶顶泄漏率可降低0.15%,涡轮级总静效率可提升0.31%。展开更多
基金Funded by the Natural Sciences Foundation of China(No.51808025)the Pyramid Talent Training Project of BUCEA(No.JDYC20200329)。
文摘To explore the distribution of and the mechanical properties(compressive strength)of the hardened body of alkali slag-fly ash cementitious materials,this study was conducted by using the XRD,FTIR,SEM/EDS,and other test methods in three conditions:airtight drying(AD),airtight immersion(AI),and airtight soaking(AS).The 1D distribution law of free of hardened body under standard curing conditions was explored.The experimental results show that under standard curing conditions,the 1D distribution of within 0d-3 d shows a∨-shaped distribution,within 3-7 d show a∧-shaped distribution,and within 7-28 d tends to be balanced.The test results of leaching rate show that the free was the most stable under AD conditions and the hardened body bound the most by XRD,FTIR and SEM/EDS.And the compressive strength of the hardened body was the highest.The compressive strength of 28th reached 95.9 MPa.The definite distribution of provides an important reference for the strength development and durability evaluation of the hardened body of alkaliexcited cementitious materials.
文摘目的探讨健脾消痰方结合常规减肥措施治疗脾虚痰湿型肥胖症临床效果。方法按照随机数表法将92例脾虚痰湿型肥胖症患者分成对照组和观察组,各46例。对照组采用调整饮食生活方式减肥方法,观察组在对照组常规减肥措施基础上联合健脾消痰方治疗。观察2组治疗前后临床症状积分(食少纳呆、脘腹痞闷、头身困重、大便溏泄)、身体质量指数(BMI)、腰围、臀围、空腹血糖(FBG)、餐后2 h血糖(2 hFBG)、血清总胆固醇(TC)、三酰甘油(TG)、低密度脂蛋白(LDL-C)、高密度脂蛋白(HDL-C)、白细胞介素1β(IL^(-1)β)、白细胞介素6(IL-6)、肿瘤坏死因子α(TNF-α)水平变化情况,并比较2组治疗总有效率及安全性。结果观察组治疗后BMI、腰围、臀围、FBG、2 h FBG、TG、TC、LDL-C水平,IL-6、IL^(-1)β、TNF-α水平均低于对照组(P<0.05),HDL-C水平、治疗总有效率均高于对照组(P<0.05);2组均无明显用药不良反应发生。结论健脾消痰方结合常规减肥措施治疗脾虚痰湿型肥胖症疗效确切,安全有效,能够有效调节糖脂代谢紊乱,抑制炎性因子表达,减轻肥胖程度。
文摘为了控制涡轮叶顶间隙泄漏流以改善叶顶区域的流动状况,提出了机匣周向槽造型方法。以典型跨声速涡轮级(Thermal Turbomachinery and Machine Dynamics,TTM)模型为对象,研究了不同高度的机匣周向槽造型对涡轮叶顶流动结构和气动特性的影响。结果表明,引入机匣周向槽造型后,近叶顶涡系结构发生了显著变化,叶顶泄漏涡(TLV)分为前后两部分,TLV-1穿过上通道涡(UPV)并逐渐被消耗,TLV-2则在周向槽之后重新形成并发展至尾缘,导致TLV的强度减弱,尺度减小。此外,由于周向槽的卷吸削弱了马蹄涡压力侧分支(HVP)的强度,加上TLV-1的压制和消耗,UPV更为远离机匣,与TLV的交互作用减弱,其强度减弱,尺度减小。总体而言,随着造型高度增大,叶顶间隙泄漏率逐渐减小,涡轮级总静效率先增大后减小。相比于无周向槽设计,当造型高度为2倍叶顶间隙时,叶顶泄漏率可降低0.15%,涡轮级总静效率可提升0.31%。
