链

After that, the model is validated safety and reliable by using the State Matrix Equation of the Petri network. According to the theory that the State Topological Map of Petri Network and Markov chain are isomorphous, the Markov chain of the model is deduced, by which some function indexes such as marked density of probability, average token-number, and usage of transformation can be calculated.

同时，本文运用Petri网系统的状态矩阵方程的方法对模型进行了可达性验证，经验证该模型是安全可达的，并根据随机Petri网的状态图同构马尔可夫链的原理，获得该模型的马尔可夫链，运用该MC链分析了模型的标记概率密度、位置中的平均标记数以及变迁的利用率等性能指标。

Through the bar adjacent matrix which can reflect the character of the multiple joint-point bar and multiple joint, the curtailedkinematic chain can be obtained, then its breadth-first spanning tree and 3 basic loops are deduced.

利用能够反映多副杆和复铰特点的构件邻接矩阵，构造运动链的缩减运动链，进而得到缩减运动链的广度优先生成树和三个基本回路。

Speak of friendship link, really a few jubilate a few anxious, because some is linked by the station of K, be gotten by complicity a suit sewage, because PR is low,have a plenty of new station, or Baidu is updated not seasonable, perhaps collect little wait a reason a moment, find the website with tall weight very hard to become a link.

说起友情链接，真是几多欢喜几多愁，有的因为链接到被K的站，被连累得一身污水，有的是新站因为PR低，或者百度更新不及时，或者收录少等等原因，很难找到权重高的网站做链接。

Through the calculation on flexivity of drag-chain and length of chain curve,set screw-pull-ing instrumentneeds to be adaptedto suitable period.

通过对牵引链的挠度和链曲线长的计算，确定链传动需要调整的适当时期。

And optimized measure as it happens is converse: Buy a link proper motion promotion, increase website flow, explore a link (had discharge others to just agree to link) with you, increase weight.

而优化的步骤正好是逆向的：购买链接自行推广，增加网站流量，寻求链接(有了流量别人才肯与你链接)，提高权重。

The essence of business models is to reflect the logic of firm's value creation. It can be measured with three dimensions, i. e., the orientation of the enterprises in an industry value chain or value network, their competitive advantages, and potential benefits.

商业模式的本质是反映企业价值创造的逻辑，可以由企业在产业价值链或价值网络中的定位、企业在价值链或价值网络中的竞争优势以及企业在价值链或价值，网络中能够获得的潜在利润三个维度来衡量。

The operating range suitable for three-phase reaction was obtained and a mathematical model established. The results show that MSB formed by fine magnetizable powder and fliudizing flow can be operated stably in a wide range. MSB has three kinds of regimes: particulate, chain, and magnetically condensed. In these regimes, the chain regime is the best for three-phase reaction. When Ni-RE-P catalyst particles mixed with some iron powder, magnetically stabilization is easily achieved; therefore, it is possible that NiRE-P catalyst can be controlled in the bed for reaction more easilly if adding certain percentage of iron powder.

研究结果表明：细粉铁磁性颗粒形成的磁稳定床可在较宽流速范围内稳定操作，该磁稳定床有三种操作状态：散粒状态，链式状态和磁聚状态，其中有利于进行气液固三相反应的操作状态是链式状态；当磁稳定床在最小流化速度和带出速度之间操作时，床层处于链式状态；最小流化速度和带出速度可用（1-24）、（1-25）、（1-27）、（1-33）式计算；弱软磁性Ni-RE-P非晶催化剂中混入定量铁粉颗粒后便可形成磁稳定床，因此利用混入铁粉颗粒在外加磁场作用下控制弱磁性非晶催化剂颗粒进行反应的方法是可能的。

Abstract］ objective to observe gentamicin pmma chain in the treatment of chronic osteomyelitis.methods the seven cases of chronic osteomyelitis patients,had thorough debridement therapy,implanted in the bone marrow cavity in the soft tissue around with gentamicin pmma chain,indwelling two weeks over.results cured five cases,two cases were effective.conclusion gentamicin chain is important in treatment of chronic osteomyelitis,recommends retaining three months.

目的 观察庆大霉素 pmma 珠链在慢性骨髓炎治疗中应用的临床疗效。方法对7例慢性骨髓炎患者，彻底清创治疗后，在骨髓腔内与周围软组织内植入庆大霉素 pmma 珠链，留置 2 周以上。结果治愈5例，有效2例。结论庆大霉素珠链是治疗慢性骨髓炎的重要方法，推荐留置 3 个月。

According to the experiment results of degradation in field, degradation mechanism of the biodegradable mulch film can include four stages: the first, the material surface appeared deficiency while the surface area and interstice increased of material in the action of natural environment and microorganism; the second, along with the surface area and interstice of material increased and the gap strengthened, the chemical chain of the high polymer's principal chain broke as a result of the hydrolysis or the enzymatic effect in the action of hydration, causing the molecular weight and mechanics function descended; the third, the molecular of high polymer split the low polymer after its physical mechanical function descended, the material decomposed the fragments, the mass defect intensified; the fourth, the low polymer of fragments form in the natural environment, the microorganism, the biological enzyme became the smaller fragments, thus absorbed by the phagocytes, or further turn into CO2 and H2O due to hydrolysis.

根据田间降解试验结果推测，生物全降解地膜的降解机理可能包括四个阶段：第一，在自然环境、微生物作用下，材料表面出现缺陷，同时表面积增大、空隙增多；第二，随着材料表面积的增大、空隙的增多，吸水性增强，在自水合作用下，高聚物主链由于水解或酶解而使化学链断裂，导致分子量和力学性能下降；第三，在其物理机械性能下降后，高聚物分子链断裂为低聚物分子，材料裂解为碎片状，质量损失加剧；第四，碎片状低聚物在自然环境、微生物、生物酶作用下进一步水解变成尺寸更小的碎片，从而被吞噬细胞吸收，或进一步水解，生成CO2和H2O。

Supply chain management is the current market environment, the most effective management approach, but when using a material requirements planning system composed of a number of corporate supply chain, the material requirements planning systems within the enterprise to pursue the best features and the whole supply chain committed to the best the characteristics of the conflict arises, it must be coordination and cooperation.

供应链管理是当前市场环境里最有效的管理方式，但是当采用了物料需求计划系统的多个企业组成供应链时，物料需求计划系统追求企业内部最优的特性和供应链致力于全体最优的特性就会产生冲突，因此必须进行协调合作。

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。