[Preface to the column: cognition and practice of endodontic microsurgery]. [PDF]
Huang D, Wang X, Huang Z, Ye L.
europepmc +1 more source
以中国境内天山山区为研究区,基于2000—2006年的遥感积雪产品积雪分布时间序列趋势和空间分布特征,对积雪分布的年际变化趋势、积雪分布随海拔的变化趋势、积雪频率以及积雪雪线高度的年变化进行了分析.结果表明:1)积雪经历从秋季开始累积到春季开始消融的过程,1—2月积雪面积达到最大,7—8月面积最小.冬季积雪所占比例最大,超过50%;2)2000—2006年积雪面积年际变化略呈上升趋势,冬季上升趋势较明显,春、秋和夏季变化趋势不明显 ...
窦燕, 包安明, 李兰海, 陈曦
core
[Clinical comparison of xenograft versus synthetic bone graft materials in micro crestal flap-alveolar ridge preservation following extraction of molars]. [PDF]
Zhang S +5 more
europepmc +1 more source
[Predictive Performance of Routine Blood Test Parameters for the Severity of Brain Damage in Patients With Acute Cerebral Hemorrhage in High-Altitude Regions]. [PDF]
Ma J +6 more
europepmc +1 more source
[Application of modified latissimus dorsi musculocutaneous flap in repair of Gustilo-Anderson type <b>Ⅲ</b>B and <b>Ⅲ</b> C upper limb injuries with composite tissue defects]. [PDF]
Liu H +7 more
europepmc +1 more source
叶片性状是决定植物光合能力和羧化能力的关键因素,研究叶片性状在海拔梯度上的变化特征是解释植物对于环境变化的适应策略的重要手段。以分布于红池坝(109°58'E,31°30'N)草地的5个常见物种红三叶(Trifolium pratense)、老鹳草(Geranium wilfordii)、紫菀(Aster tataricus)、火绒草(Leontopodium leontopodioides)和绣线菊(Spiraea prunifolia)为研究对象,分析了所有物种(n=56)和不同物种的叶片比叶重 ...
王宁 +4 more
core
[Efficacy of thermo-expandable nickel-titanium alloy ureteral stent placement as maintenance therapy for ureteral strictures]. [PDF]
Chen G +7 more
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利用位于玛纳斯河流域地区不同海拔高度的6个采样点的树木年轮宽度资料,建立其宽度年表,并分别将位于上树线区域的2个年表和下树线区域的3个年表合成,得到森林上树线年表(MNU)和下树线年表(MNL),将涝坝湾年表作为森林中部年表(MNM)。对比3个树轮宽度标准化年表的特征参数及年表对气候的响应,结果表明:(1)样本总体代表性、平均敏感度、信噪比、第一特征向量百分比随着海拔的升高而递减。(2)高频信息量随着海拔的升高而递减,而低频信息量随着海拔的升高而递增。(3)气温是制约森林上树线年表(MNU ...
新疆师范大学地理科学与旅游学院,新疆 乌鲁木齐830054 +19 more
core
[Staging<b>-</b>based integrative treatment strategies of traditional Chinese and Western Medicine for zoster<b>-</b>associated pain]. [PDF]
Shan H +5 more
europepmc +1 more source
[Clinical application research of three-dimensional printed patient-specific cutting guides in Cole midfoot osteotomy]. [PDF]
Zhang Z +7 more
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