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The text summarized the situations and factors of AAC brick wallings crack, and in the terms of mechanics, AAC material characteristics, ordinary mortar characteristics, constructing craft, we analyze the principle of AAC brick walling crack and feasibility of AAC brick exclusive mortar research.

本文概述了加气混凝土砌块墙体开裂情况和开裂原因，并从力学，加气混凝土砌块材料特性，普通砂浆特性，施工工艺等方面分析了加气混凝土砌块墙体的裂缝开裂机理，分析了加气混凝土砌块专用砂浆研究的可行性。

In order to satisfy the real-time control of air/fuel ratio,this model was simplified based on two supposals as follows:(1) the intake air mass flow rate has a linear form with the product of the two established expressions,the throttle angle expression and the intake air pressure expres...

为满足基于模型进行空燃比实时控制的要求，基于以下两个假设对模型进行了简化：(1)假设进气流量与模型所建立的关于节气门开度和进气压力的表达式的乘积成线性关系；(2)充量系数和进气压力的乘积与进气压力成线性关系。

Results Main imaging findings of acute pulmo nary abscess were found to be dense ir regular patchy shadows,cloud -mass form high density shadows,mult iple spheroidal shadows,cavity formation with gas -fluid plane,contai ng gas cysts,mill...

结果急性肺脓肿主要表现为不规则斑片状浓密影，云团状高密度影，多发球形影，空洞及气液平面，含气囊肿，粟粒样小结节影及伴随以上病灶的胸膜增厚、胸腔积液等，其中空洞及气液平面，含气囊肿是其特征性表现。

Recently, acute poisoning frequently happens which is caused by the release of chlorine in the production process,as the dense gas,chlorine dispersion model contain continuous diffusion and instantaneous dispersion, and we can separately use dense gas flat plume model and dense gas box puff model to calculate the density of the gas.

risk analysis ； dispersion ；近来，生产过程中氯气泄漏引起的急性中毒事故频繁发生，作为重气的氯气泄漏扩散分为连续扩散和瞬间扩散二种模式，并且分别应用重气云羽平板模型和重气云团盒子模型来计算重气扩散浓度。

CeO2 doped ZnO nanowires were synthesized by thermal evaporation, then prepared as the heater type gas sensors. Under violet ray radiation (wave length: 370~395 nm), the gas sensitivity of CeO2 doped ZnO nanowires has been measured using static state distribution.

以物理热蒸发法制备的CeO2掺杂ZnO纳米线为气敏基料，制作成旁热式气敏元件，采用紫光（波长（为3702~395nm）激发，用静态配气法对浓度均为1×10^(-2)%的甲烷和一氧化碳进行了气敏性能的测试。

To assure extinguishing efficiency of the fire suppression system on fire, the system is requested to perform enclosure integrity test in accordance with NFPA 2001 standard. For reducing the high cost of test, this thesis proposes a method of using backpropagation neural network to simulate the field test and estimate the retention time when the suppressant is discharged, the result can be a reference of self-survey and the improvement prior to fire inspection.

为确认气体自动灭火系统安装后，是否能於火警发生时立即发挥灭火功效，我国内政部消防署要求业主须依照美国国家消防协会NFPA 2001规定，进行防护区空间气密测试，然实际於现场进行气密测试耗费人力并且所费不赀，本论文提出以倒传递类神经网路模拟现场气密测试，估测灭火气体释放后防护区气密时间，以作为消防检查前自主检查及改善之参考，确保火灾发生时系统能达到真正灭火的功能而防患未然。

Characteristics of trace organics removal was studied during the treatment of algae-laden raw water with two process trains ( dissolved air flotation GAC filtration, dissolved air flotation sand filtration +GAC filtration).

试验以高藻水源水为处理对象，就两工艺流程(溶气气浮+活性炭过滤，溶气气浮+砂滤+活性炭过滤)对高藻原水中微量有机物的去除特性进行了考察。

It is therefore a priority for designers and operators to achieve and maintain high saturation efficiency in DAF.

对气浮工艺设计者和运营者来讲，达到并维持较高溶气效率是优先考虑的问题，而对新型气浮设备研发者而言，了解并确定其在不同工况下的溶气效率也是至关重要的。

The results demonstrate that mixing bubble to pure jets makes the profile of water elevation flatting, the velocity distribution of centerline rising and the fluctuation of velocity near surface fluctuating. The fluctuation of the centerline velocity lack of self-preserve and the whole flow field represents the characteristics of anisotropies.

对比纯射流情况，掺气射流中掺气使得射流中线附近的流速增大；对流场紊动量的分析表明，掺气使射流中心处水面的紊动加剧，掺气射流的紊动强度在射流的中垂线上不具有自相似性，射流在流场中表现为各向异性。

The forced expiratory volume in first second(FEV1) decreased 0.03 L per year, FEV1/FVC%(FEV1%) decreased 0.151%, peak expiratory flow rate 0.118 L/s, maximal mid-expiratory flow 0.04 L/s, maximal voluntary ventilation 0.876 L, vital capacity 0.04 L. Residual volume increased 0.033 L per year, functional residual capacity 0.033 L. VC,FVC,FEV1,RV,RV/TLC of healthy elderly in the exsmoker group were significantly different from nonsmokers. The declinations of lung functions were not significant in different age group of healthy elderly.

结果 用力肺活量每年下降0.032 L，第1秒用力呼气量(FEV1)每年下降0.03 L，FEV1占用力肺活量比值（FEV1%）每年下降0.151%，呼气流量峰值每年下降0.118 L/s，最大呼气中段流量每年下降0.04 L/s，最大通气量每年下降0.876 L，肺活量每年下降0.04 L，残气容积每年升高0.033 L，功能残气量每年升高0.033 L，残气容积/肺总量每年升高0.596%。

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。