探讨在低碳经济下如何节约降低空调加湿的能耗

在生态危机及环境恶化的压力下,发展低碳经济既是国际大背景,更是我国自身经济发展的必由之路。具体到暖通行业,从空调系统的设计运行中通过改进设计理念,采用新产品,运行维护中实现多方面可调节以及能源的回收以及再利用等五种手段可以做到切实减少能源的浪费。     

ASP生产Ti-IF钢在不同退火过程中再结晶组织和织构演变

对ASP生产Ti-IF钢的退火再结晶过程分别进行了罩式退火和连续退火模拟实验,通过金相组织观察和力学性能检测,并结合X射线衍射和电子背散射衍射技术,从不同的实验角度对再结晶组织和织构的形成及演变进行了研究.结果表明,由于罩式退火和连续退火两者的热历史过程不同,其再结晶组织转变温度及晶粒度有所不同,但是再结晶核心的形成位置及演变方式趋于一致,形核方式趋向于择优形核.     

Multi-threshold second-order phase transition in laser

We present a theory of the multi-threshold second-order phase transition,and experimentally demonstrate the multi-threshold secondorder phase transition phenomenon.With carefully selected parameters,in an external cavity diode laser system,we observe secondorder phase transition with multiple(three or four) thresholds in the measured power-current-temperature three dimensional phase diagram.Such controlled death and revival of second-order phase transition sheds new insight into the nature of ubiquitous secondorder phase transition.Our theory and experiment show that the single threshold second-order phase transition is only a special case of the more general multi-threshold second-order phase transition,which is an even richer phenomenon.     

Waugh结构(NH_4)_6[MnMo_9O_(32)]·8H_2O催化合成乙酸异戊酯

以Waugh结构钼锰杂多酸盐作为催化剂对乙酸异戊酯的合成进行了催化研究.确定了最佳反应条件:醇酸摩尔比为1.646∶1,酸化催化剂用量为0.2 g,带水剂为3 mL甲苯,反应时间63 min左右,选择性100%,转化率达82.70%.     

Investigation of silicon on insulator fabricated by two-step O+ implantation

In this paper, we investigated the dose window of forming a continuous buried oxide (BOX) layer by single implantation at the implantation energy of 200 keV. Then, an improved two-step implantation process with second implantation dose of 3×10¹⁵ cm^?2 was developed to fabricate high quality separation by implanted oxygen (SIMOX) silicon on insulator (SOI) wafers. Compared with traditional single implantation, the implantation dose is reduced by 18.2%. In addition, the thickness and uniformity of the BOX layers were evaluated by spectroscopic ellipsometry. Defect-free top Si as well as atomic-scale sharp top Si/buried oxide interfaces were observed by transmission electron microscopy, indicating a high crystal quality and a perfect structure of the SOI fabricated by two step implantation. The top Si/BOX interface morphology of the SOI wafers fabricated by single or two-step implantation was also investigated by atomic force microscopy.     

浅谈企业工会劳动保护工作

结合实际,提出应当从提高认识,加强班组领导,积极开展安全竞赛等方面改进企业工会劳动保护工作。     

Optimal policy with a total order quantity commitment contract in the presence of a spot market

In this paper,the optimal policy is considered when the buyer faces two supply sources:one is the contract supplier from which the buyer orders over a specific contract period(say,a year) at a pre-agreed price,and the other is the spot market.However,when ordering from the contract supplier,the buyer must fulfill a pre-determined total order quantity,or the so-called definite total order quantity commitment,over the whole contract period.In other words,the commitment secures the buyer a fixed price but obliges him/her a total order quantity over the contract period.Although the spot market gives the buyer more flexibility in terms of order quantities,its prices are volatile.Such a combination of contract and spot procurements is often observed in practice.Within the contract period,there are multiple sub-periods,during each of which the buyer reviews the inventory,issues an individual order,and uses the on-hand inventory to meet the random demand.Thus,in each(ordering) period,the buyer will weigh between the current known spot price(by procuring from the spot market) and a lower future price(by waiting while consuming the remaining commitment).An optimal dual ordering policy is characterized for each period,depending on the on-hand inventory level,the spot price,and the remaining commitment quantity.The optimal policy in each period is also shown to be independent of the contract price.Through a numerical study,the inventory cost is demonstrated to be(1) insensitive to the contract price when the total commitment quantity is lower than the total expected demand over the contract period and(2) non-increasing in the variability of spot prices.     

Upwind finite volume element methods for one-dimensional semiconductor device

A fully discrete implicit Euler upwind finite volume element method is derived and studied for one-dimensional semiconductor device. Upwind scheme is introduced to deal with the convection-dominated diffusion equations in the semiconductor model. With different time steps for the electrostatic potential and the other unknown quantities, the computational procedure of the method is obtained. The local mass conservation laws are preserved under the framework of the upwind finite volume element schemes. A first-order accuracy in the L ²-norm is proved. Numerical experiments are given to validate the usefulness and efficiency of the method.     

浅谈高层住宅防渗漏施工技术

如何克服高层住宅楼渗漏的质量通病是建筑工程实践和理论界的重大课题.在近几年的高层住宅楼工程施工过程中,建筑工程管理者和技术工作人员高度重视了高层住宅楼工程质量通病的预防,完善和推广了科学有效的高层住宅楼工程防渗漏施工技术措施.本文从高层住宅楼外墙面、外墙窗口、厨房、卫生间及地下室的高层住宅楼工程防渗漏施工完整技术体系入手,介绍了较为有效的控制高层住宅楼工程防渗漏的施工技术措施.     

Single-Chain Fragmented Antibodies Guided SiRNA Delivery in Breast Cancer

Over the past ten years,the enthusiasm to harness small RNA molecules,mainly small interfering RNAs(siRNAs) and microRNA mimics,into therapeutic weapons has never been quenched.However,a major obstacle hindering the clinical application of these small molecules is how to efficiently and precisely deliver siRNAs in vivo into target cells to silence target genes.An international collaborative study led by Song Erwei from the Memorial Hospital of Sun-YatSen University and Wang Jun from Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences of University of Science and Tech-