循环次数

• 2 . the relation between stress ratio and span centre deflection is linear , and when the stress ratio is large , the increase of mid - span deflection by cycle index is small . the smaller the stress ratio is , the larger the increase of span centre deflection by cycle index is
  ( 2 )应力比对跨中挠度的影响呈线形关系,且应力比较大时,跨中挠度随循环次数的增长相对较小;应力比较小时,跨中挠度随循环次数的增长相对较大。
• When the time of heat preservation prolonged , the intensity of most orientation of perovskite phase became stronger , and the full width at half maximum ( fwhm ) decreased . when the time of heat preservation was 80 seconds , the intensity of ( 100 ) and ( 110 ) orientation began to decrease
  循环次数从1次增加到3次, plt薄膜的( 100 )和( 200 )峰的衍射强度逐渐增强,薄膜的结晶性提高,铁电性能逐渐增强,循环4次溅射后,薄膜的结晶性和铁电性开始下降。
• It was shown that salt expansion value of low liquid - limit clay was accumulated before the sixth freezing and thawing cycles , but the increment of salt expansion was reduced gradually with increasing cycles ; the salt expansion accumulation of low liquid - limit clay could be separated into three phases ; the deformation of clayey sand was mostly frost heave and subsidence under cycles , and collapsibility value of clayey sand was accumulated with increasing cycles ; the variation of salt expansion ratio and collapsibility ratio was a parabolic function of freezing and thawing cycles
  试验结果表明：低液限粘土前五次冻融循环过程中盐胀具有较好累加性，随着冻融循环次数的增加，盐胀量增长速度逐渐降低；含砂低液限粘土的盐胀过程可以被分为三个阶段；粘土质砂在冻融循环过程中的变形主要为冻胀和沉降变形，具有较好的溶陷累加性；低液限粘土、含砂低液限粘土的盐胀率和粘土质砂的溶陷率与冻融周期之间的关系符合二次抛物线变化规律。
• The diagnosis program is made in visual c + + . the samples are trained with this network , during which the relationships between the network parameters ( such as rule number , study rate , expert network initial error and gate network error , circulation times and power index ) and learning error were probed into , and the outcome can provide the basis for network parameter selecting
  并采用visualc + +编制了系统程序，首先通过分层混合专家网络对故障样本进行训练，在训练中对分层混合专家网络各参数（规则数、学习率、门网络中止误差、专家网络初试迭代误差、循环次数、加权指数等）与学习误差平方和的关系进行了探讨，其结果为样本网络参数的合理选取提供了依据。
• According to the stress spectrum of weaking section in fatigue test and s - n curve of classic welding joint in this section , we establish a model of life calculating by the principle of fatigue damage equivalence , then we get the relationship between the cross sustaining device ' s actual utilizing life and the load recycle number in fatigue test
  根据疲劳薄弱部位在室内疲劳试验中的应力谱及该部位典型接头的s - n曲线，按照疲劳损伤等效原则建立交叉支撑装置的寿命预测模型，得到了交叉支撑装置实际运用寿命与室内疲劳试验加载循环次数的关系。
• Abstract : the effects of sodium hydroxide concentration and chlorination temperature on effective chlorine content of calcium hypochlorite were tested . the effects of mesh number of standard sieve on effective chlorine content of calcium hypochlorite were tested . the retrieval technology of effective chlorine in mother liquor of calcium hypochlorite was researched , and the effects of cycle number on effective chlorine content of calcium hypochlorite were tested . the results indicate that when sodium hydroxide concentration is 333 . 3 g / l , and chlorination temperature is 20 , the effective chlorine content of calcium hypochlorite is highest , that when mesh number of standard sieve is 180 mesh , the effective chlorine content of calcium hypochlorite is higher , but the passing sieve rate is not too low , that the cycle number has no remarkable effect on the effective chlorine content of calcium hypochlorite , and the effective chlorine content of calcium hypochlorite is basically above 80 %
  文摘:测试了烧碱质量分数和氯化温度对漂粉精有效氯含量的影响，测试了分盐用标准筛目数对漂粉精有效氯含量和过筛率的影响.研究了漂粉精母液中有效氯的回用工艺流程，并测试了循环次数对漂粉精有效氯含量的影响.结果表明，烧碱质量分数为25 、氯化温度为20时，漂粉精的有效氯含量最高；标准筛目数为180目时，漂粉精的有效氯含量较高而过筛率不太低；循环次数对漂粉精有效氯含量没有显著影响，并且漂粉精有效氯含量基本上可以达到80以上
• Following is the factors ideating with the surface of old concrete in different way ( including brushing surface , chiseling surface , cleaving surface ) , adherence agent ( including cement slurry , cement sand slurry , cement slurry with the u expansion agent ) , the freeze - thaw circulation times and air - entraining . as a result , we found that the roughness influence on the adhesion capability of the new on old concrete to a large degree . the larger rougeness is , the larger the splitting tensile strength on the adhension face is . the kind of adhesion agent is also influence on the adherence capability of new on old concrete . the circulation times of freez - thaw have a large influence on the splitting tensile strength of adherence face of new on old concrete . the analysis of tests give some advices to the practical engineering
  主要考察了老混凝土表面不同处理方式(刷毛面，凿毛面，劈裂面) 、界面粘结剂类型(水泥净浆，水泥砂浆， u型膨胀剂水泥浆) 、冻融循环次数等对新老混凝土粘结面劈拉强度的影响，以及冻融作用下新混凝土加气对粘结面劈拉强度的影响。试验结果表明，粗糙度对新老混凝土粘结性能有重要影响，随着粘结面粗糙度的增大，粘结面劈拉强度不断增加；界面粘结剂类型对新老混凝土粘结性能有一定影响，在冻融作用下， u型膨胀剂水泥浆粘结效果不如水泥净浆和水泥砂浆；冻融循环对粘结面劈拉强度有较大影响，加气能明显改善新老混凝土粘结面的抗冻能力。
• 3 . the action of main affected factors , such as axial force , shear - span ratio , transverse reinforcement amount and so on , are described in detail to study the shear behavior and mechanism of columns under cyclic load . 4 . the shear contribution of concrete and transverse reinforcement as to the increasing of columns * displacement ductility level is also investigated
  详细地分析了位移延性、循环次数以及剪跨比、轴压比及配箍特征值等因素对框架柱构件骨架曲线、荷载退化曲线、刚度退化曲线及构件滞回性能等的影响，得出了反复荷载下框架柱塑性铰区域剪切受力性能的众多试验研究结果。