不变因子

The former, intracranially complements patients some factors, most frequently with TH gene to compensate scanty of intrastriatal DA and improve the symptoms of the patients, while have little resistance to the progressive degeneration of dopaminergic neurons; The latter provide variety of neurotrophic factors, most specific being the glial cell-line derived neurotrophic factor , to protect the residual DA neurons in the nigrostriatal system from further pathogenic injuries, while have little benefit to those DA neurons with irreversible damage, and them cannot offset the already-existing symptoms.

前者是给宿主脑内补充某些因子，主要是DA合成过程中的限速酶TH基因，以补充纹状体内DA含量的不足，减轻患者的症状，但对DA能神经元的进行性退变没有治疗效果；后者则是提供各种神经营养因子其中最具特异性的为GDNF，以保护黑质一纹状体系统内剩余的DA能经元免受病因的继续损害但对已发生不可逆性损害的DA能神经元并无拯救作用，无法消除已出现的症状。

The results showed that there existed variation among eucalypt families in wood physical-mechanical properties and wood chemistry. There were significant differences among E.pellita families、E.grandis families and E.urophylla譋.grandis clones in wood colors as well as between Strains and within trees.The variation of the surface wetability of wood between E.grandis families and E.urophylla譋.grandis clones were significant.Even in the same families level or clones level,there still existed the same regulation. The degree of collapse of eucalypt had a large relation in the amount of tylosis in vessel and vestured pits on the cell wall of vessel. The more rich tylosis and vestured pits in vessels,the more probability to occur collapse for eucalypt.The biggest moment collapse was probably the critical point of the drying degrade.During the fomulation of drying technology,it is necessary to adopt moderate condition to make the vessels which had formed the biggest moment collapse at the biggest moment collapse resume,especially to prevent the permanent set.At the normal temperature level,the main factors which influenced residual collapse were the contents of ray parenchyma and axial parenchyma .Nearly all the cells joined the course of forming the moment collapse and biggest moment collapse.Interval drying was fit for eucalypt plantation which was easier to make collapse.

研究表明：桉树不同家系间木材物理力学性质和化学组成存在差异；粗皮桉家系间、巨桉家系间、尾巨桉无性系间材色存在显著差异，株间、株内木材材色存在变异；桉树木材表面润湿性在巨桉家系间、尾巨桉无性系间存在着显著差异，在同一家系或同一无性系中，株间和株内也存在着相同的变化规律；桉材皱缩程度与其导管中侵填体的多少和导管壁上纹孔具有的附物多少密切相关，侵填体含物越丰富，纹孔附物越多，桉材越容易皱缩；最大瞬间皱缩是能产生更大干燥降等的临界点，在制定干燥工艺时，必须在最大瞬间皱缩发生时，采用温和条件，使已产生最大瞬间皱缩的细胞尽可能多的恢复，尤其不能使其产生永久变定；在常温条件下，影响残余皱缩的主要因子是射线薄壁细胞和轴向薄壁细胞含量；而对于瞬间皱缩和最大瞬间皱缩，几乎所有细胞都参与它们的形成过程；对于易皱缩的桉树木材，间歇干燥是最有前途的干燥方法。

Experiment shows that both the dry plate pressure drop and the wet plate pressure drop increase with the increase of the kinetic energy factor in plate hole but have no influence of the height of cap. The wet plate pressure drop linearly ascends as the clear liquid height increases. Liquid lift-up increases at first then decreases with the increasing of the kinetic energy factor in plate hole, increases with the clear liquid height increasing and the height of cap decreasing, but as the kinetic energy factor in plate hole increased, the influence of height of cap will gradually decreased.

实验表明干板压降、湿板压降均随板孔动能因子的增大而增大，不受罩体高度变化的影响，湿板压降随清液层高度的增大而增大，成正比关系；液体提升量随板孔动能因子的增大先增大后减小，随清液层高度的增大而增大，随罩体高度的增大而减小，但随板孔动能因子的增加，罩体高度的影响逐渐变小；漏液量随板孔动能因子的增大迅速减小，随清液层高度的增大而增大，但接近漏液点时清液层高度的影响不明显。

Aims :Chronotropic incompetence, an attenuated heart rate response to exercise, is an independent predictor of cardiovascular mortality, but it is not known whether chronotropic incompetence is related to carotid atherosclerosis.

目的：变时性机能不全是心血管病死亡率的独立预测因子，但是我们尚不清楚变时性机能不全同颈动脉粥样硬化是否相关。

The transfer matrix method is used to carry out the vibration characteristic analysis of the fluid-filled piping system. The transfer matrix of the axial, transversal and torsion vibration of the fluid-filled straight pipe element is presented. And the transfer matrix of the elbow is derived according to the discrete model of the inextensible theory of the curve pipe. The effect of the flexural factor on the elbow's transfer matrix is studied.

基于充液直管的梁模型，考虑液体与管道之间的泊松耦合，详细推导了充液直管单元的轴向、横向及扭转振动传递矩阵；采用弯管不延伸理论的离散模型，将变管离散为一组首尾相连，并成一定角度的短直管单元，通过建立弯管处力平衡方程与连续性方程，建立了弯管平面内振动的传递矩阵，并研究了弯曲因子对传递矩阵的影响。

Two algorithms breaks through the shortcoming of weighting value immobilizes in the traditional average filter algorithm, and it can characteristic adjust the weights from of data in the filter window, thus makes the weights from noise point is very small contributing to the output date.

两种算法突破了传统的均值算法中加权值固定不变的缺点，可以根据窗口内数据的特点来自适应的调整赋予每个采样点的权值，从而使受噪声污染的信号对输出的权值贡献非常小，而且通过对滤波因子的调整，使得对于脉冲噪声和高斯噪声均有良好的抑制作用。

None of the other potential prognostic factors evaluated (including patient age, gender, tumor grade, tumor location, subtotal resection, presence or absence of cranial nerve palsies, total dose, 3D conformal radiotherapy, duration of symptoms, or radiological response) were associated with patient overall survival in multivariate analysis.

以多变数分析评估其他一些可能的预后因子（包括病患年龄、性别、肿瘤的分化程度、肿瘤位置、是否接受手术切除、有无脑神经麻痹、放射治疗总剂量、三度空间顺形放射治疗、症状的持续时间、或影像学上肿瘤是否变大）均不影响病患存活率。

The mechanism of instability wrinkling in the process based on minimum energy principle is revealed, uniform mathematic description of the wrinkling wave on the strip of in-plane bending is established, the internal and external energy is deduced by energy method, and a uniform criteria of internal and external wrinkling is established; then how to combine the criteria with the FEM simulation system to make the numerical prediction of wrinkling into reality is also resolved in the paper. The effects of the forming parameters on the deforming result are analyzed by the uniform predict criteria. The results show as follows: as the compress width increase, external wrinkling first come into being, then internal winkling do, and finally in-plane bend occur; the loading wedge angle increase, internal winkling first come into being, thenin-plane bend do, and finally external wrinkling occur; in-plane bend is possible to occur with a increase of the strain-hardening exponent and the strength coefficient; and the effect of the friction factor may be ignored.

2揭示了板带不均匀压下面内弯曲成形过程基于能量原理的失稳起皱机理，提出了统一的描述内外缘起皱波形的函数，采用变分法推导了服从该波形函数的内外缘起皱能，建立了统一的起皱预测准则；将新建立的统一的起皱预测准则引入到数值模拟系统IBS中，数值预测结果与实验结果的吻合较好；分析了成形过程各参数对起皱的影响规律：随着接触变形区宽度的逐渐增大，先是发生外缘起皱，然后发生内缘起皱，进而才出现稳定成形；随着实际加载楔角的增大，先是发生内缘起皱，然后发生稳定成形，进而出现外缘起皱；硬化指数和强化系数增大，易于稳定成形；摩擦因子对起皱的影响不明显；而且接触变形区宽度对起皱的影响最大。

This result provides a new explanation to the so-called re-entrant integral quantum Hall effect.

此外，我们通过一个简化的模型，证明随着填充因子增加，从Bubble相到条纹相之间发生不连续相变。

The results indicate that weight factor had significantly effect on gait speed, steps per minute, gait cycle time, the ratio of stance time and swing time, maximal flexion angle of knee joint and the range of motion of elbow joint. Shelf height had significantly effects on hip flexion and elbow ROM. Box size factor had significantly effect on stride length, gait cycle time, the ratio of stance time and swing time, knee joint elbow ROM. For the muscle activity levels with EMG, load weight and shelf height both affected the %MVC significantly. When the subjects carrying a load of 14kg, the muscle activity and the subjective body part discomfort rating are both higher than that of 7kg. The box size had effect on the body part discomfort rating of upper extremity and back. For the kinetic and kinematics analysis, the shelf height around elbow height was better than the other two height levels.

研究结果显示，对步态时间与空间参数而言，重量因子显著影响步速、步频、步态周期时间与站立期摆荡期比值，箱型因子显著影响步长、步态周期时间与站立期摆荡期比值；关节活动度而言，重量显著影响膝关节最大弯曲角度、肘关节屈伸角度范围，高度因子显著影响髋关节前后倾角度、肘关节活动各变项，箱型因子影响膝关节弯曲最大最小值以及肘关节活动各变项，对肌肉活动度而言，重量与高度因子皆显著影响MVC%值，14公斤重者肌肉活动度与主观不舒适程度皆较7公斤者高，箱型因子虽无明显影响肌肉活动度，但是在主观不舒适程度上却明显影响上肢与背部，终点放置高度应设在肘高附近为佳。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。