可获得的

And then the effects of compositions on the mechanical performance, characteristic temperatures, thermal expansion and chemical stability of the glass were discussed. Researches on lead borate sealing glasses show that PbO/B2O3 ratio exerts the most important effect on glass network. ZnO is beneficial to stabilize the glass against devitrification . Bi2O3 has little effects on the sealing temperature, while it helps to adjust the thermal expansion coefficient of lead borate glasses in a definitive range. When 0.5～4 mol% GeO2 is introduced, the glass possesses the highest stability and lowest sealing temperature (400 ?C), which is desirable for low-temperature sealing.

通过对含铅的硼酸盐封接玻璃研究得出，PbO/B2O3比是影响玻璃网络最主要的因素；添加ZnO有助于增强玻璃的稳定性，抑制析晶；Bi2O3对高铅系列配方玻璃的封接温度影响不大，但可使铅硼系列玻璃体系的热膨胀系数在一定范围内可调；在高铅系列配方中，引入0.5～4mol%的GeO2可有效地抑制玻璃析晶，降低封接温度；最终获得了两种性能较好的低熔点铅硼酸盐封接玻璃配方，G3封接温度低达400℃，其PbO含量为54mol%左右，BL10玻璃的封接温度为440℃，但其铅含量大大降低，仅为36mol%。

And with these results, I delve further into the theoretical issues of MSP and the concentration is on a special class of MSP-Doob skeleton processes. Generalized limit distribution, limit distribution of these processes and conditions and the expressions for the existence of invariable measure of such processes are provided. Finally, these new results are then applied to queueing theory, reliability theory and inventory theory. A detailed study of GI/G/1 queuing model, parallel connection system model, water reservoir model and perishable inventory model is discussed. These models have already been investigated to some degree. In particular, as mentioned above, some scholars have already successfully applied the transient behavior theory of MSP to these models and transient distributions of main variables in such models have been obtained. However, the limit behavior has not been addressed. In this thesis, limit behavior of main variables in the above-mentioned models is established.

在这个基础上，对马尔可夫骨架过程的理论进一步进行了探讨，将注意力集中于一类特殊的马尔可夫骨架过程Doob骨架过程，给出了这类过程的广义极限分布、极限分布以及不变测度存在性条件和表达式，并应用这些结论于排队论、可靠性理论和存储论等领域-具体分析了GI/G/1排队论系统模型、并联系统模型、水库储水模型、易腐烂物品库存模型——这些模型都不同程度地被许多学者研究过，特别，如前面提及，已有人成功地应用马尔可夫骨架过程的瞬时性态理论，获得了上述各模型中的主要参量过程的瞬时分布，但是，却并没有探讨它们的极限性态——建立了若干关于上述各模犁的主要参量过程的极限性态的结果。

Taking software testing process as a Markov decision process,a Markov decision model of software testing is proposed in this paper,and by using a learning strategy based on the cross-entropy method to optimize the software testing,this paper obtains the optimal testing profile.

将软件测试过程处理成马尔可夫决策过程，给出了软件测试的马尔可夫决策模型，运用交叉熵方法，通过一种学习策略获得软件测试的最优测试剖面，用于优化软件测试。

Raytheon was awarded a system development contract for the NSSMS in September 1969, engineering a system based on the RIM-7H SeaSparrow missile, the Mk 29 lightweight octuple launcher and the Mk 91 fire-control system.

雷声公司获得了系统开发合同的NSSMS在1969年9月，工程技术为基础的系统篮筐- 7小时海麻雀导弹，马可福音29轻量级octuple发射装置和马可福音91火控系统。

Producing PHAs,and then were orientationally inserted into a prokaryotic expression vector pBV220. By analyzing the bioactibity and function of their products, the biological function of phaA, phaB and phaC was confirmed. These have been done in our laboratory. To make better use of the three genes by plant bioreactor, two groups of different plant expression vectors that can be used to produce PHAs in different plants were constructed, and the transformation of PHA in Oxalis triangnlaris has been preliminarily reseached.The following is the main results:Three plant expression vectors pBI121-A,pBI121-B and ubquiting-C, which can be used to be transformed into Oxalis triangularis were respectively constructed by using the phaA, phaB and phaC.

菌株的亚克隆基因组片段中，分离出phaA、phaB和phaC三个基因片段，定向克隆至原核表达载体pBV220，通过对其生物活性与功能分析，确证了基因phaA、phaB和phaC的生物学功能；为了通过植物生物反应器对这三个基因进一步研究利用，本实验利用这三个基因构建了两组可用于不同植物生产PHA的真核表达载体，并对紫叶酢浆草进行PHA基因遗传转化的初步研究，获得主要结果如下：利用克隆的phaA、phaB、phaC三个基因分别构建了可用于转化紫叶酢浆草表达载体pBI121-A、pBI121-B、uBquiting-C；可用于玉米转化的种子特异性表达载体p7S-A、pBI121-S-B、uBquiting-C。

Markov network is an undirected graph, it could be the uncertainty of knowledge, reasoning, No words can explain to the edge between relevance, through Markov network learning mechanism words of relevant information.

Markov网络是一个无向图，它可进行不确定性的知识推理，无向边可解释词间相关性，通过Markov网络学习机制获得词的相关信息。

Breed can be used sow law, cuttage law and Qiegenfa to breed, sow ℃ of 20-25 of gemmiparous comfortable Wen Wei to control, spring, summer, Qiu Jun but, left and right sides of a month after sowing is gemmiparous, sow although the law is OK short time acquires more plant amount, but from the time that sows to blossom longer, still be much commonly so with cuttage breed is given priority to, cuttage with spring, summer two Ji Wei is comfortable period, insert with terminal bud for beautiful, cuttage sends a root extremely easily, cuttage hind can become a young plant about 4 weeks.

繁殖可利用播种法。扦插法及切根法繁殖，播种发芽适温为20-25℃左右，春。夏。秋均可，播种后约1个月左右发芽，播种法虽然可以短时间获得较多的植株数量，但是从播种到开花的时间较长，所以一般还是多以扦插繁殖为主，扦插以春。夏两季为适期，以顶芽插为佳，扦插极轻易发根，扦插后约4周即可成苗。

Catalysts used for abating the pollution of automobile exhaust emissions were prepared by nonprecious metal oxides, such as the oxides of Ⅰ B,Ⅴ B,Ⅵ B,Ⅶ B,Ⅷ B group, alkaline earth group and rare earth elements.

在实验室用模拟汽车排气，评价催化剂的氧化、还原效率，获得了具有较低起燃温度的催化剂(对于CO低于150℃HC为200℃)，机械强度良好，而且可承受高温冲击(耐温可达900～1000℃)。

Results A good stability can not he obtained with wire osteosynthesis in the treatment of midface fractures.

结果 钢丝骨间结扎不能获得良好的稳定性，而小钛板坚固内固定则可重建面中份骨骼的支柱结构，获得足够的三维稳定性和重建理想的面部外形。

RESULTS AND CONCLUSION: The cervical three-dimension images were reconstructed clearly with the CT three-dimensional reconstruction techniques. The cervical pedicular width, the axial length,α and β angles were measured by the soft measure function.

结果与结论：应用CT三维重建技术可以获得清晰颈椎三维图像，使用软件测量功能可精确地获取预置螺钉的椎弓根管宽度、轴线长度、α及β角；在颈椎椎弓螺钉置入情况下，可测量置钉的水平角度安全范围。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。