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For naturally cooled monobloc barrel, its thermal condition in regular regime can be evaluated by measuring the outside temperature of two arbitrary rounds;(2) During a sustained firing process, unsteady heat conduction exists in a monobloc barrel, whereas unsteady and quasi steady heat conduction exist with actively cooled composite barrels, meaning that the thermal condition changes from uncontrolled to controlled;(3) Different combinations of the convective heat transfer coefficient h and thickness of gun barrel δ have much effects on cooling the bore temperature.

利用有限元软件分析了某大口径火炮身管的温度场分布，并对自然散热条件下的单筒身管和主动冷却条件下的复合身管温度场进行了比较，其结果为(1)身管温度场分布存在初始和正规工况阶段，后者的单筒身管热状态可以通过测定任意两发身管外表面温度来评估；(2)持续射击过程中，单筒身管始终处于非稳态导热过程，主动冷却身管则包括非稳态和准稳态两个过程，实现了身管热状态由不可控向可控转变；(3)对流传热系数h和身管壁厚δ的组合对降低内膛温度具有很大影响。

These primer combinations produced a total of 1 119 bands, 229 specific loci (including 54 absent bands, and 175 monomorphic bands). Among them, 983 polymorphic bands, accounting for 88%, were detected. The percentage of identification per primer combination was as high as 100%. The average PPB of 14 foreign cultivars was 35.86% and the average PPB of seven domestic cultivars was 31.51%.

结果表明：8对引物共产生1 117条谱带， 229个特异位点（其中缺失带54条、单态带175条），多态带983条，多态带的比例为88%；每对引物鉴别效率为100%。14个国外银杏观赏品种平均多态带的比例35.86%，7个国内品种平均多态带的比例31.51%。21个观赏品种之间相似系数为0.4899～0.8499。

Particularly for design purposes, it is important that a reliable strength prediction be available for various combinations of multiaxial stresses.

它将以往各种适合於某一类材料的单一强度理论推进为可以适合於多种材料的统一强度理论。

Pedicel axillary buds were cultured on Murashige and Skoog's basal medium with combinations of 6-benzylaminopurine (2-3 mg/L) and α-naphthaleneacetic acid (0.1-0.5 mg/L).

在不含其他有机添加物，只添加BA (3mg/L)+NAA (0 。1mg/L)的MS培养基中，原球茎诱导效率达 80 %。

The plant e tracts are preferably derived from Populus nigra, Rhinacanthus nasutus, Sapindus rarak, and Thumbergia laurifolia, and any combinations thereof .

植物提取物优选来源于黑杨、白鹤灵芝、毛瓣无患子和Thumbergialaurifolia及其任意组合。

The potential for the combination of drugs that have activity at both receptor systems or that can induce more or less neurotoxicity is not clear; however, recent nonclinical data suggest that some combinations may be more neurotoxic than the individual components.

联合用药的潜在风险激活受体系统或强减轻神经毒性还未知。然而现有的非临数据显示一些联合用药的毒性大于任何的单独应用。

Glioma is still one of refractory disease in the neurosurgical field; the development of new primary and adjuvant treatment is vital. Recently, the gene therapy of glioma is developed rapidly and there are many methods about the gene therapy that include: suicide gene therapy, immunologic gene therapy, drug resistangce gene therapy, angiostatin gene therapy and so on. The sucide gene therapy is the most potential approach of antitumer, these nonmammalian genes encode enzyme that convert nontoxic prodrugs into highly toxic metablites. Cells transfected with suicide genes are targeted for specific negative selection, witch can be induced by administrtion of the corresponding produg. Among the enzyme/produg combinations, two of the best characterized system are herpes simplex virus thymidine kinase /ganciclovir and Escherichia coli cytosine deaminase /5-flourocytosine (5-FC). The formor can convert the antiviral nucleoside analogs acyclovir , ganciclovir to their nucleoside monophosphate derivatives, the monophosphate forms are subsequently phosphorylated by endogenus cellular kinases to triphosphates, these molecules are potent inhibitors of DNA synthesis.

近年来脑胶质瘤的基因治疗发展迅速，应运而生的方法有自杀基因、免疫基因、多药耐药基因以及抗血管生成基因等，其中自杀基因被认为是最有前景的基因治疗方法，它又称病毒介导的酶／药物前体疗法，是利用转基因技术将哺乳动物细胞中所不含有的自杀基因转入到哺乳动物肿瘤细胞中，该基因表达的产物可将无毒的药物前体转化为毒性药物，从而选择性杀伤该肿瘤细胞，常用的自杀基因有单纯疱疹病毒-胸苷激酶基因和大肠杆菌胞嘧啶脱氨酶基因，前者催化无毒性抗病毒核苷类似物如丙氧鸟苷、无环鸟苷等成为单磷酸核苷衍生物，然后在内源性细胞激酶作用下转化为具有明显毒性的三磷酸核苷，作为DNA合成链的终止剂和DNA合成酶的抑制剂，干扰细胞DNA的合成；后者编码的胞嘧啶脱氨酶可催化5-氟胞嘧啶（5-FC）脱氨成为5-氟尿嘧啶（5-FU），然后代谢为有毒性的5-氟尿嘧啶-5′三磷酸（5-FUTP）和5-氟-2′脱氧尿嘧啶-5′磷酸（5-FdUTP），5-FUTP通过与UTP竞争性结合而抑制mRNA和tRNA的合成，5-FdUTP则作用于胸苷合成酶，导致TMP衰竭而阻止DNA的合成，最终诱导肿瘤细胞凋亡。

The comparison between the two grouping ways does show the lead-lag relationship among stock combinations, in a certain extent, coming from the effect of nonsynchronous.

两种分组方法的对比也正说明了股票组合间领先滞后关系在一定程度上来源于异步交易的影响。

The investigators examined fetal outcome data from 972 pregnancies collected from 1997 to 2002 in a nested case-control study. The participants were nulliparous and had no known medical complications. Pregnancies were grouped in eight categories based on the presence or absence of combinations of hypertension, hyperuricemia, and proteinuria.

研究者检验自1997年至2002年一项病例控制试验中972次怀孕的妊娠结果，受试者皆为第一次怀孕，而且没有已知的其他疾病；根据高血压、尿酸过高、与蛋白尿的有无，将怀孕分为8个项目。

Grade elements listed under this article relate primarily to the various combinations of pais of a winning hand.

本条列出的番种主要和胡牌中牌子的不同组合型式有关。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

Talk Undelete failed; someone else may have undeleted the page first.

Talk 无法删除选定的页面或图像（它可能已经被其他人删除了）。