可以抑制的

The reconstruction problem is ill-posed, so two optimal criterions, the least module and the smoothness criterion base on Tikhonov regularization technique, are introduced into reconstruction algorithm. Many regularization parameters choice strategies are investigated, and the TPA(Two—Parameter Algorithm) strategy which is based on the Morozov discrepancy principles, is implemented in two regularization reconstruction algorithms.Numerical experiment results show that the nonnegative and smoothness constraint condition can overcome the difficulty of iteration semiconvergent, preconditioned technique can improve convergence rate and reconstruction accuracy, smoothness regularization criterion can meliorate ill-posed problem of reconstruction and enhance iteration stability, and the TPA is an effective strategy of regularization parameters choice.

数值试验表明：在共轭梯度法中引入非负约束和光滑约束改善了迭代的"半收敛"性，非负约束保证了解的非负性，光滑约束抑制了重建解的振荡现象，约束算法的重建精度与无约束算法相比大幅度提高；在约束共轭梯度重建算法中引入预优技术，可以加快算法的收敛速度，提高迭代的稳定性和重建精度；引入光滑准则的正则化技术可以有效改善图像重建问题的不适定性，加快迭代的收敛速度，提高迭代的稳定性和图像重建质量，计算正则参数的TPA算法在闪光照相图像重建中是有效的。

"Spermatogenesis is a long and complex process controlled by multiple interacting mechanisms, and there is a general consensus on the need for FSH in the regulation of this process," write Carlo Foresta, MD, and colleagues from the University of Padova in Italy.

精子的生成是一个很长且很复杂的过程，它是由多种彼此作用的机制控制的，在这个过程中，一般都一直需要卵滤泡刺激素的作用，」意大利Padova大学的Carlo Foresta医师及其同事写道：「从睾丸细胞学分析的结果可以看到，采用100 IU剂量的重组人卵滤泡刺激素隔日使用，以刺激精子产生的过程，同时，还可以增加射出的精子的数目，并加强抑制素B的分泌。

As an immunomodulator NO may play a role like a double-edged sword since it expresses both in immuonchalleged and immunosspresed states. 2. After received external stimulus the morphology of ependyma of SFO could be changed and varied with time course, particularly its cellular apoptosis do occur and earlier than the ordinary areas of the brain. 3. Astrocytes in SFO could express cFos protein induced by LPS, suggesting the cells may maintain homeostasis in the brain in a longer period and modulate immune state of the brain. 4. As a CVO, SFO may sense changes of blood-bearing immunosignals earlier and instantly response to them, thus as one of windows of the brain SFO do take part in immunomodulation within the brain.

通过我们的实验结果我们可以得出这样一些初步的结论：1、一氧化氮作为免疫调质参与了机体免疫，它既能在免疫激发状态下又可在免疫抑制状态下进行表达提示，NO在脑内免疫调节中的作用可能是双向的。2、穹窿下器的室管膜形态在接受外界刺激后，随着时间的变化而不同，扫描电镜下的凋亡形态虽需进一步证实，但室管膜细胞确实发生了凋亡，并且穹窿下器发生的较早。3、穹窿下器内的星形胶质细胞在给予大肠杆菌后确实可以表达c-fos蛋白，并可能通过自身的激活来较长时间的维持体液的动态平衡，调节脑内免疫状态。4、穹窿下器作为感受性室周器官之一，能够较早的感受血携免疫信息的改变并及时作出反应，可能作为外周免疫信息进入脑内的窗口之一来参与脑的免疫调节。

The reconstruction problem is ill-posed, so two optimal criterions, the least module and the smoothness criterion base on Tikhonov regularization technique, are introduced into reconstruction algorithm. Many regularization parameters choice strategies are investigated, and the TPA(Two—Parameter Algorithm) strategy which is based on the Morozov discrepancy principles, is implemented in two regularization reconstruction algorithms.Numerical experiment results show that the nonnegative and smoothness constraint condition can overcome the difficulty of iteration semiconvergent, preconditioned technique can improve convergence rate and reconstruction accuracy, smoothness regularization criterion can meliorate ill-posed problem of reconstruction and enhance iteration stability, and the TPA is an effective strategy of regularization parameters choice.

数值试验表明：在共轭梯度法中引入非负约束和光滑约束改善了迭代的&半收敛&性，非负约束保证了解的非负性，光滑约束抑制了重建解的振荡现象，约束算法的重建精度与无约束算法相比大幅度提高；在约束共轭梯度重建算法中引入预优技术，可以加快算法的收敛速度，提高迭代的稳定性和重建精度；引入光滑准则的正则化技术可以有效改善图像重建问题的不适定性，加快迭代的收敛速度，提高迭代的稳定性和图像重建质量，计算正则参数的TPA算法在闪光照相图像重建中是有效的。

In order to limit cold welding and promote powder refining, process control agent or cryomilling is used.

通常可以添加过程处理剂或在低温下球磨来抑制球磨过程中的冷焊，促使粉末细化。

It is a good illustration of the type of measure policymakers can use to arrest incipient asset price overheating.

对于政策制定者可以采用哪种措施来抑制初期资产价格过热现象，这是一个很好的实例。

The NK-cell activity was shown to be suppressed in the presence of mAbCD28 and its Fab fragments for a relatively long time after PTG transplantation.

结果发现，mAbCD28及其Fab片段在移植后移植物有功能这段时期内，可以显著地抑制TNF-α水平的上升，直至移植物被排斥。

The results showed that mAbCD28 could block the costimulatory signals transmitted by CD28 molecules, and played an immunosuppressive role in parathyroid gland transplantation in rats.

本实验结果提示：mAbCD28可以阻断CD28-B7之间共刺激信号的传递，并在同种异体大鼠甲状旁腺移植中起到免疫抑制作用。

Realisations of the philosophy are shown for high-precision static measuring units and for universal broadband amplifier systems .

采用高精度检测单元和通用宽频带放大器系统可以高分辨率，高稳定性，有效地抑制和衰减干扰信号与不期望的动态信号，实现高精度检测。

Results also showed that SA could reversed the inhibition effect of JA on root hairs formation.

研究结果还显示，SA可以逆转JA对根毛发生的抑制。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。