中铝河南分公司矿山在土地复垦中的有益探索

分析了铝土矿露天开采和土地、环境之间的利害关系，并对矿山公司“土地复垦”工艺技术进行了阐述，介绍了中铝河南分公司矿山公司方面的具体作法和成功经验。     

Efficient primal-dual heuristic for a dynamic location problem

In this paper the dynamic location problem with opening, closure and reopening of facilities is formulated and an efficient primal-dual heuristic that computes both upper and lower limits to its optimal solution is described. The problem here studied considers the possibility of reconfiguring any location more than once over the planning horizon. This problem is NP-hard (the simple plant location problem is a special case of the problem studied). A primal-dual heuristic based on the work of Erlenkotter [A dual-based procedure for uncapacitated facility location. Operations Research 1978;26:992–1009] and Van Roy and Erlenkotter [A dual-based procedure for dynamic facility location. Management Science 1982;28:1091–105] was developed and tested over a set of randomly generated test problems. The results obtained are quite good, both in terms of the quality of lower and upper bounds calculated as in terms of the computational time spent by the heuristic. A branch-and-bound procedure that enables to optimize the problem is also described and tested over the same set of randomly generated problems.     

澳大利亚铁矿业的先进技术介绍

介绍了澳大利亚RioTinto矿业集团的HIsmelt Plant、帕拉布杜和恰那铁矿、汤姆普莱斯铁矿、扬地库吉那铁矿、皮尔巴拉铁路公司和Dampier港的先进技术、质量控制体系、生产体系，及其作业的主要步骤、不同矿体的矿石特性、铁路系统运作和丹皮尔港的基本情况。     

山特维克可乐满公司切削刀具涂层技术的发展

介绍了山特维克可乐满公司切削刀具涂层技术的发展，并对该公司自1979年以来硬质合金涂层产品的发展情况进行了总结。     

西南油气田建设用地面临的困难及其对策

从四川盆地油气勘探开发建设用地特点入手,分析了西南油气田用地现状和新形势下油气勘探开发建设用地在保证工期、控制成本、提高效率、政策支持、关系协调等方面所面临的挑战,提出了下一步为保证生产建设用地按时、有效、科学、合理、合法的取得而应采取的有效措施。     

An efficient procedure for finding best compromise solutions to the multi-objective assignment problem

In this paper, we consider the problem of determining a best compromise solution for the multi-objective assignment problem. Such a solution minimizes a scalarizing function, such as the weighted Tchebychev norm or reference point achievement functions. To solve this problem, we resort to a ranking (or k-best) algorithm which enumerates feasible solutions according to an appropriate weighted sum until a condition, ensuring that an optimal solution has been found, is met. The ranking algorithm is based on a branch and bound scheme. We study how to implement efficiently this procedure by considering different algorithmic variants within the procedure: choice of the weighted sum, branching and bounding schemes. We present an experimental analysis that enables us to point out the best variants, and we provide experimental results showing the remarkable efficiency of the procedure, even for large size instances.     

Improved GPU SIMD control flow efficiency via hybrid warp size mechanism

High single instruction multiple data (SIMD) efficiency and low power consumption have made graphic processing units (GPUs) an ideal platform for many complex computational applications. Thousands of threads can be created by programmers and grouped into fixed-size SIMD batches, known as warps. High throughput is then achieved by concurrently executing such warps with minimal control overhead. However, if a branch instruction occurs, which assigns different paths to different threads, one warp will be broken into multiple warps that have to be executed serially, consequently reducing the efficiency advantage of SIMD. In this paper, the contemporary fixed-size warp design is abandoned for a hybrid warp size (HWS) mechanism. Mixed-size warps are generated according to HWS and are scheduled and issued flexibly. The simulation results show that this mechanism yields an average speedup of 1.20 over the baseline architecture for a wide variety of general purpose GPU applications. The paper also integrates HWS with dynamic warp formation (DWF), which is a well-known branch handling mechanism used to improve SIMD utilization by forming new warps out of split warps in real time. The simulation results show that the combination of DWF and HWS generates an average speedup of 1.27 over the DWF-only platform with an estimated area increase of about 1% of DWF.     

《建造合同》准则执行中的若干问题的思考

我国在1998年6月第一次发布了《建造合同》准则,2006年2月重新修订并发布了新的《建造合同》准则,新准则要求会计人员具有较高的业务素质和职业判断能力,并要求提高实务操作能力。文章结合江汉油建公司现行核算办法,分析了建造合同新的核算办法与江汉油建公司目前核算上存在的差异,并在此基础上提出了相应的解决措施。