弃旧立新——沈阳友谊国际会议中心改扩建设计

本文通过对沈阳友谊国际会议中心改造扩建工程的介绍,表达了在友谊宾馆特定环境下,建筑师对选址、规划、旧建筑、环境、材料材质、功能、空间的综合考虑与关注,将业主需求的新功能理性地“溶解”在旧建筑中,形成与环境特色共生的新建筑。     

25%噻.喹乳油防治柑桔红蜘蛛田间药效试验

通过试验显示，噻．喹乳油防治柑桔红蜘蛛不但防治效果好，１０００倍液药后１天为９１．４％，３天为９１．２％，１０天为９５．６％，而且药产的持续时间也较长，可达４０天以上。它克服了噻螨酮防治柑桔红蜘蛛前期效果差和喹硫磷药效持续时间短的缺点。     

单纯形优化法在马氏体相结构计算中的应用

将单纯形优化法应用于ＣｕＡｌＮｉ合金以马氏体相结构的嵌入原子法计算中，获得了在各有序度下２Ｈ和Ｍｌ８Ｒ＿１马氏体的稳定能量以及对应的结构参数。     

Enhanced visible light photocatalytic activity of QDS modified Bi2WO6 nanostructures

Bi₂WO₆ (BWO) nanostructures with QDS dispersed on single crystalline nanosheets were successfully prepared by a facile solvothermal method. The product possessed large surface area of 60 m²/g and exhibited excellent visible light absorption with a blue shift from 2.54 eV to 2.75 eV. The photocatalytic efficiency of the sample was six times that of nanoparticles assembled BWO nanostructures and three times that of nanoplates assembled BWO nanostructures. The photocatalytic mechanism for degradation of dyes over QDS modified BWO nanostructures was discussed, which revealed the important role of QDS in the generation, migration and consumption of the photogenerated electrons and holes.     

掺杂V_2O_3系PTC陶瓷中金属相的研究

报导在掺杂Ｖ＿２Ｏ＿３系ＰＴＣ陶瓷中引入Ｆｅ金属相，采用ＸＲＤ，ＳＥＭ分析技术确定Ｆｅ金属相在材料中的结构状态，并结合材料ＰＴＣ性能测试结果讨论了Ｆｅ金属相对材料烧结性能和ＰＴＣ性能的影响。     

Triboelectrification based on double-layered polyaniline nanofibers for self-powered cathodic protection driven by wind

Polyaniline nanofibers (PANI NFs) are introduced to construct a wind-driven triboelectric nanogenerator (TENG) as a new power source for self-powered cathodic protection. PANI NFs serve as a friction layer to generate charges by harvesting wind energy as well as a conducting layer to transfer charges in TENG. A PANI NFs-based TENG exhibits a high output performance with a maximum output voltage of 375 V, short current circuit of 248 μA, and corresponding power of 14.5 mW under a wind speed of 15 m/s. Additionally, a self-powered anticorrosion system is constructed by using a PANI-based TENG as the power source. The immersion experiment and electrochemical measurements demonstrate that carbon steel coupled with the wind-driven TENG is effectively protected with an evident open circuit potential drop and negative shift in the corrosion potential. The smart self-powered device is promising in terms of applications to protect metals from corrosion by utilizing wind energy in ambient conditions.

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Gelatin manipulation of latent macropores formation in brushite cement

Macroporous brushite cement was prepared from a mixture of -tricalcium phosphate (-TCP) and monocalcium phosphate monohydrate (MCPM) using gelatin powder as a latent templates. In a setting reaction coexisting with gelatin, closed packed, open-pore structure with 100–200 m macropores are obtained after immersion of the set cement into PBS buffer (pH 7.4) at 37 °C for 1–4 weeks. The macroporous brushite cement has compressive strength of 15 MPa originally, which reducing to 5.5 MPa with macropore formation gradually in comparison to that of cancellous bone (5–10 MPa).     

Co/Al金属在聚晶立方氮化硼中的作用及加工适用性

通过正交试验和切削试验相结合的方法,检测聚晶立方氮化硼(PCBN)烧结体的硬度和强度,分析并观察烧结体组元相互熔渗状况以及微观形貌,探索了Co/Al金属对PCBN烧结体的影响以及不同结合剂含量PCBN的加工适应性。试验结果表明:CBN含量和Co含量对PCBN的抗弯强度和硬度影响显著;在刀具材料的选择上,高PCBN浓度的刀具适合加工灰铸铁,低PCBN浓度的刀具适合加工淬硬钢;Co/Al金属能够通过高温高压在PCBN层和硬质合金基体之间进行相互熔渗,导致PCBN层在距硬质合金10~20μm处Co含量达到最大值;PCBN的失效为穿晶断裂方式。     

超薄白色罩面(UTW)结构设计方法

为了研究半刚性基层沥青路面上超薄白色罩面(UTW)结构设计方法,采用三维有限元方法计算了UTW路面结构的荷载应力。通过计算确定了UTW路面的设计荷位为纵缝边缘中部。基于基层顶面当量回弹模量(Et)和旧沥青层模量(Ea)及统计分析结果,提出结构强度综合系数为Rj=E(t1/3)×log(Ea),得到了Rj<17时的板厚设计图表,并验证了Rj<17适用于我国大部分需要修复的沥青路面的路况。借鉴水泥混凝土路面设计规范,在考虑疲劳及可靠度的基础上,提出了考虑温度和荷载综合影响的UTW路面结构设计计算公式,并通过足尺试验验证了该设计方法的可行性,同时对确保UTW层间黏结的施工方法进行了探讨。最后探讨了UTW路面结构的适应性,并指出其在重载高等级道路的适用性尚需实体工程进一步验证。