Efficient encoding of IEEE 802.11n LDPC codes

Addressed is the issue of LDPC coding for the emerging IEEE 802.11n standard. An efficient encoding algorithm is proposed. The algorithm is simple and easy to implement. The memory requirement is trivial     

考虑塑性铰外移的钢框架梁柱连接设计

介绍美国联邦突发事件管理局 (FEMA)对 1 994年北岭地震中焊接钢框架节点破坏原因的正式解释 ,说明塑性铰外移的必要性。此外 ,还介绍了塑性铰外移的两种基本形式以及狗骨式 (RBS)连接的有关设计规定和适用条件 ,其设计方法可供我国工程设计人员参考。     

均布压力作用下厚壁圆管弯矩计算方法的探讨

建立了厚壁圆管弯矩计算公式，通过分析的均布压力作用下厚壁圆管与薄壁圆管压力相对误差，给出了厚壁圆管与薄壁圆管分类原则，了解和掌握这一原则对工程师大有禅益。     

旋风燃烧器冷态模型内颗粒运动轨迹计算

在冷态模型流场内，考虑气流对粉煤颗粒的气动阻力，建立其运动微分方程式。通过计算，得到九种粒径的颗粒在流场中的运动轨迹、停留时间、着膜位置和气－固相相对速度与该燃烧器几何参数和气动参数的关系，为燃烧器的深入研究提出了建议。     

自动加矾控制系统设计和运行

介绍了自动加矾控制系统在厦门安兜水厂的应用情况和运行处理效果     

Failure analysis and wear mechanism study of a heavily loaded gear

Failure analysis and a study of the wear mechanism were performed on a heavily loaded carburized gear with some unusual features. The analysis showed that the different failure forms on the tooth surface of the gear were dependent on the sub-surface shearing stress, the lubrication conditions and the surface roughness. Delaminations formed on the addendum surface were the main reason for the gear failure. A suggestion for improvement has been tried, and a desirable result has been obtained.     

深基坑重力式沙袋堆叠挡土工程的实践

本文介绍了湛江金辉煌综合楼工程的深基坑应用沙袋堆叠作挡土结构的设计与施工     

The effect of the EAAEAE insert on the property of human metallothionein-3

MT3 shows apparently different properties and function fromMT1 even though they have 70% sequence homology. Possibly thetwo inserts, Thr5 and a negatively charged hexapeptide at position-55in MT3, play important roles. A series of MT3 variants aroundthe EAAEAE hexapeptide have been prepared by site-directed mutagenesisand their properties and reactivity towards pH, EDTA and DTNBhave been studied. Our detailed studies revealed that the EAAEAEinsert is essential to the property of MT3. It is the hexapeptideinsert, to some extent, making the MT3     

加强和改进纪检监察工作的几点做法

加强和改进纪检监察工作，必须强化教育，落实党风廉政建设责任制；完善制度，建立有效的监督制约机制：正风肃纪，严肃查处违纪违法案件；围绕中心，开展效能监察工作；维护稳定，构建企业和谐稳定环境。     

Gas Permeability of Wetwood and Normal Wood of Subalpine Fir in Relation to Drying

Subalpine fir (Abies lasiocarpa Hook) lumber containing wetpockets (wetwood) was used for the measurements of gas permeability and the results were then compared to the gas permeability of normal wood, which was free of the wetpockets. The impacts of pretreatment methods were also investigated, including steaming at green condition, steaming at fiber saturation point (FSP), microwave treatment, and radio-frequency treatment. Results from this study demonstrated that both the transverse and the longitudinal gas permeability of subalpine fir wetwood are greater than that of normal wood. There is no significant change in the permeability after 4-h steaming pretreatment at green condition and at FSP. The impacts of microwave and radio-frequency pretreatments were not significant, but the findings cannot be generalized because they may depend on the power intensity applied.