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At last, natural frequencies of practical pre-stressed composite space truss are tested with pulsatory method on construction site and its damping ratio is calculated, which gives another important data for engineering design. In addition, through the model experiment of pre-stressed rectangular square pyramid composite space truss, the correctness of characteristics of internal force and the feasibility of tension recovery method are proved.

最后，在工程施工现场用脉动法测试自振频率，并借助于振动衰减曲线和半功率点法计算出预应力组合网架——钢与混凝土的混合结构体系——的阻尼比，此又为工程设计提供了一理论依据；另外，通过正放四角锥预应力组合网架的模型试验，验证了结构内力分布特点的正确性以及张力松弛法的可行性。

The common suspension roof support without pre-stressing based on the constant stress field is no longer safe for such engineering. Recently, the popular and receptible supporting form is high-strength pre-stressed bolting with resinic anchoring agent for the deep underground engineering.

基于浅部常应力场的普通非预应力锚杆支护已不能满足此类工程的安全性要求，以树脂药卷作锚固剂的高强、超高强预应力锚杆支护应属于目前最能符合此类深部地下工程的支护形式。

Stress of Cu and Cd reduced the amounts and remobilization rate of pre-anthesis stored assimilates and total amount of pre-anthesis stored assimilate.

其中，以Cu_2、Cd_2处理对叶片花前贮藏物质再运转量和再运转率的影响最大，Cu_3、Cd_2处理对茎鞘和颖壳花前贮藏物质再运转量和再运转率影响最大。

Bidders will not be invited to participate in the rewardful design without passing the pre-qualification; bidders with intent should sign up and collect the pre-qualification documents and the relevant from Cheng Du WanAn Construction Project Management Co., Ltd (Address: 7th Floor, Guangdian International Plaza, 30# Xiaxishuncheng Rd, Chengdu City, Sichuan Province, China); or submit the all documents per fax, EMS, or e-mail to the above address before the closing date of registering.

资格预审合格的投标人方可参与有偿设计，有意向的投标人请到成都市下西顺城街30号四川广电国际大厦7楼的成都万安建设项目管理有限公司报名并领取资格预审文件和相关资料。或将所有资料通过传真、邮政快件或电子邮件于报名截至日前送至上述报名地址。时间为2007年4月17日至4月23日上午9时至11时，下午2时至5时。

Bidders will not be invited to participate in the rewardful design without passing the pre-qualification; bidders with intent should sign up and collect the pre-qualification documents and the relevant from Cheng Du WanAn Construction Project Management Co., Ltd (Address: 7th Floor, Guangdian International Plaza, 30# Xiaxishuncheng Rd, Chengdu City, Sichuan Province, China); or submit the all documents per fax, EMS, or e-mail to the above address before the closing date of registering.

资格预审合格的投标人方可参与有偿设计，有意向的投标人请到成都市下西顺城街30号四川广电国际大厦7楼的成都万安建设项目管理有限公司报名并领取资格预审文件和相关资料。或将所有资料通过传真、邮政快件或电子邮件于报名截至日前送至上述报名地址。

But there are more and more great engineering accidents because of ruinate pre-stress anchor rods, so it is increasingly important and exigent to do distributed measuring and long-term working monitoring for pre-stress anchor rods.

在桥梁、隧道、边坡、吊车梁等结构工程领域中，使用日益广泛。但因预应力锚杆、锚索失事带来的重大工程事故也随之增加，预应力锚索、锚杆应力的分布测量及长期运行监测问题，已日益重要和迫切。

After 8 weeks growth, the polarization became more obvious in the pre-ameloblast and pre-odontoblast. Cells became high stylolitic shape and small amounts of dentin formation were found in the future of dental cusp region.

生长8周时，前成釉质细胞和前牙本质细胞的极化变得更加明显，细胞已变成高柱状，在未来牙尖区域可发现少量牙本质的形成。

It was shown that the root elongation was inhibited and the malonaldehyde content in root apices and the antioxidase activities of root apices were increased under Al stress (30 μmol/L), while the effects of Al were significantly alleviated by the addition of Si (1.4 mmol/L). Moreover, both Si added before Al treatment and Si added simultaneously with Al treatment could alleviate these effects. On the other hand, the cultivar of Seca was shown to be more sensitive to Al than other cultivars in the absent of Si, while Al-resistance distinction among the cultivars of stylosanthes turned to be non-significant in the present of Si in the pre-cultured solution or both pre-cultured and Al-treatment solutions.

研究结果表明，在铝(30 μmol/L)胁迫条件下柱花草根伸长受阻、根尖丙二醛含量和抗氧化酶活性显著增加，而硅(1.4 mmol/L)处理增加根中硅的含量而降低了铝对根伸长、MDA含量和抗氧化酶活性的影响，且铝处理前12h供给的硅和前处理溶液及铝溶液中均加硅处理的影响均显著；在不加硅条件下西卡品种的耐铝性显著低于其它品种，而经硅预处理的植株和在预处理及铝处理期间均供应硅的植株的耐铝性不同品种间的差异不显著。

There were no significant differences for the firing rates in the site of contralateral TNC neurons among during pre-CSD,CSD,and post-CSD (P＞0.05).For flunarizine group,the firing rates in the site of ipsilateral TNC neurons during pre-CSD were higher as compared with during CSD(P＜0.05).2.1 There were statistical differences on palasma levels of CGRP and SP among the three groups(P＜0.05).The levels of CGRP and SP in CSD group were higher than control group(P＜0.05).No significant differences on the levels of CGRP and SP in ipsilateral trigeminal ganglia were found among the three groups(P＞0.05).2 The number of neurons with positive CGRP and SP immunoreactivity was statistically different in right-sided trigeminal ganglia among the three groups (P＜0.05).The number in fight-sided trigeminal ganglia in CSD group was higher as compared with control group(P＜0.05).The number in right-sided trigeminal ganglia was statistically higher than that in left-sided trigeminal ganglion in CSD group(P＜0.05).3.1 Altered ReHo in ipsilateral pons and other brain regions response to pain such as basal nuclei,thalamus,cingulated gyms and prefrontal cortex was detected during the acute spontaneous attack as compared with during headache remission(P＜0.05,corrected by Monte Carlo simulation). 2 Positive functional connectivity was detected between ipsilateral pons and other brain regions related to pain within pain state and within non-pain state (P＜0.05,corrected by false discovery rate,FDR).Increased functional correlation between ipsilateral pons and other pain-related brain regions such as ipsilateral prefrontal cortex and contralateral subcallosal gyrus was detected during the acute spontaneous attack as compared with during headache remission(P＜0.05,corrected by Monte Carlo simulation).

结果1。对照组未发现CSD；同侧TNC放电频率，CSD中＞CSD后＞CSD前P＜0.05对侧TNC放电频率，CSD前、中、后无统计学差异(P＞0.05氟桂利嗪组同侧TNC放电频率，CSD前＞CSD中(P＜0.05)，CSD前与CSD后及CSD中与CSD后之间无统计学差异(P＞0.05)。2.1关于放免测定，各组血浆CGRP、SP水平有统计学差异(P＜0.05)，CSD组高于对照组(P＜0.05)，CSD组与氟桂利嗪组、对照组与氟桂利嗪组之间均无统计学差异P＞0.05各组之间同侧三叉神经节中CGRP、SP水平未见变化(P＞0.05.2关于免疫组化研究，右侧三叉神经节CGRP、SP免疫阳性细胞数三组之间有统计学差异(P＜0.05)，多重两两比较结果CSD组大于对照组(P＜0.05)，CSD组与氟桂利嗪组之间、对照组与氟桂利嗪组之间无统计学差异P＞0.05左侧三叉神经节CGRP、SP免疫阳性细胞数三组之间无统计学差异(P＞0.05CSD组中右侧三叉神经节CGRP、SP免疫反应阳性细胞数大于左侧(P＜0.05)。3.1局部一致性分析发现两组患者头痛疼痛状态较非疼痛状态脑活动发生变化的脑区有同侧脑桥以及其他疼痛相关脑区如基底节区、丘脑、扣带回、前额叶皮层等(P＜0.05，蒙特卡罗模拟校正)。2功能连接分析发现疼痛状态与非疼痛状态下主要疼痛相关脑区均与同侧脑桥有功能联系P＜0.05，false discovery rate，FDR校正疼痛状态与非疼痛状态比较，同侧前额叶皮层、对侧胼胝下回等疼痛相关脑区与同侧脑桥之间功能联系增强(P＜0.05，蒙特卡罗模拟校正。

We amied the BCP sequence and the preS2 gene sequence of HBV separately as the target region, according to HBV DNA sequence of Chinese strain, synthesized the set of specific primers, amplified the sequence by PCR method from the serum of patients with CHI, verified by restriction analysis, subcloned into pGEM Teasy vectors, employed polyacrylamide gel electrophoresis to display the deletion mutation and selected the clones with differential length to be sequenced.

本研究应用PCR技术及其他分子生物学技术，分别以HBV转录调控序列BCP以及表面蛋白编码序列pre S2为靶基因，以中国株HBV基因序列为依据，设计特异性多聚酶链反应引物，分别自43例、51例慢性HBV感染患者血清中扩增出目的片段，构建质粒Teasy-BCP和Teasy-pre S2，酶切鉴定后，采用聚丙烯酰胺凝胶电泳技术展示缺失突变，再经DNA测序以了解在慢性乙型肝炎患者体内的病毒变异情况。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。