工程项目引入安全监理必要性的探讨

介绍了安全监理的定义,针对安全监理与安全监督、工程监理的区别进行了探讨,并分别阐述了工程项目引入安全监理的必要性和可行性,以期有效遏制建筑工程安全生产事故的发生,保证建筑施工安全顺利进行.     

大牛地致密低渗气田水平井压裂穿层可行性分析

大牛地气田纵向上发育七套气层,目前成熟的水平井压裂工艺技术仅能满足单层开发,如何在不改变现有工艺技术条件下,实现两层同时动用成为一个开发难点。通过数值模拟,对水平井人工裂缝穿层影响因素进行分析,明确了地质因素穿层界限;对施工参数进行优化,确定了一套适合穿层井的最优参数。现场试验表明:水平井压裂过程中人工裂缝能够实现有效穿层,达到了提高单井产量的同时也降低开发成本的目的。     

Practical cross‐layer routing and channel assignment in cognitive radio ad hoc networks

In the heterogeneous and unreliable channel environment of cognitive radio ad hoc networks (CRAHNs), a multipath route with channel assigned is preferable in both throughput and reliability. The cross‐layer multipath routing and channel assignment in CRAHNs is becoming a challenging issue. In this paper, this problem is characterized, formulated, and shown to be in the form of mixed integer programming. For this Non‐deterministic Polynomial‐time (NP)‐hard problem, the deficiency of the widely used linearization and sequential fixing algorithm is first analyzed. The main contribution of this paper is the development of a new backtracking algorithm with feasibility checking to search optimal solutions and a heuristic algorithm with high feasible solution‐obtained probability (HHFOP) for distributed application in CRAHNs. Through feasibility checking and solution bounds validating, backtracking algorithm with feasibility checking cuts off unnecessary searching space in early stage without loss of optimal solutions, making it much more efficient than brute searching. For practical application in CRAHNs with polynomial complexity, HHFOP first computes the maximal‐supported throughput through link‐channel assignment and link‐capacity coordination for each candidate path. Then the paths are combined, and the route throughput is optimized. Extensive simulation results demonstrate that HHFOP can achieve a high feasible solution‐obtained probability with little throughput degradation compared with linearization and sequential fixing algorithm, indicating its practicability for distributed applications in CRAHNs. Copyright © 2013 John Wiley & Sons, Ltd.     

卡轨车做主提升设备的可行性探讨

提出用卡轨车做副暗斜井提升设备的方案，并对其可行性加以研究。     

日照市官山榴辉岩矿地质特征及开发评价

近年来,日照市投入大量资金对榴辉岩矿进行了勘查,基本查明了官山榴辉岩矿的地质特征和矿床特征,并结合矿床开采的地质和技术条件对矿床开采的可行性做出了评价。     

弹道抛掷法测试无雷管感度工业炸药作功能力研究

为了研究弹道抛掷法测试无雷管感度工业炸药作功能力的可行性,以200 g乳化基质、铵油炸药(多孔硝铵柴油=946)、重铵油炸药(铵油炸药乳化基质=21)为试样,以100 g TNT和2号岩石粉状乳化炸药作为传爆药进行了弹道抛掷试验。结果表明:该方法测试无雷管感度工业炸药几乎不受传爆药作功能力的影响,测试数据精度高,结果可靠。同时选择了在乳化基质中加入铝粉作为试样,验证了弹道抛掷法对无雷管感度工业炸药组分变化的敏感性。结果表明:弹道抛掷法对无雷管感度工业炸药试样组分变化具有较高的敏感性。     

Research on Coordinated Antisumarine Attack Effeciency of Two Helicopters Under Countermeasures

The organization of coordinated attack and the selection of aiming point which affect hit probability were analyzed for the countermeasures taken by the hostile submarines at two helicopters’ coordinated attack.A computational model of coordinated attack parameters,a model of submarine maneuver,and a model of noise jammer were established.Compared to single helicopter’ torpedo attack,the coordinated attack of two helicopters can effectively increase the hit probability of torpedo and achieve the higher target detecting probability under counterwork condition.     

红外立体辅助驾驶系统可行性研究

为解决当前夜间辅助驾驶仪平面显示的弊端,提出利用平行式红外双目立体系统用于夜间辅助驾驶的方案。分别从波段选择、体视半径和体视区域三个方面分析了系统的可行性,最后通过搭建的红外立体辅助驾驶系统对系统的可行性进行验证。结果表明,红外立体辅助驾驶系统可以有效解决当前夜间辅助驾驶仪平面显示的弊端,有利于驾驶员对路况作出正确的判断。     

硫铁矿制酸净化工序废酸回用的探讨

为了考察硫铁矿制酸净化工序产生的废稀酸回用于湿法磷酸萃取系统的可行性问题．将经简单沉淀和经深度处理的废稀酸分剐回用于制取磷酸。结果表明,未经深度处理的废稀酸直接回用将导致磷酸产品中砷及重金属元素铅、镉的浓度明显升高,分别升高34．13、0．22、0．50倍;废稀酸经化学沉淀法深度处理后．砷及重金属元素达到GB8978--1996《污水综合排放标准》中相关指标的要求,将其回用后所得的磷酸产品中砷及重金属元素浓度不会升高。选择合适的工艺将净化工序产生的废稀酸处理达标后再回用于湿法磷酸生产系统,能够同时取得良好的经济效益和环保效益。     

论大学化学实验实施绿色化教学的可行性

化学实验实施绿色化教学是实验教学改革的重要课题,就目前化学实验产生的污染物及废液的随意排放问题,要实现绿色化学实验,减少"三废",妥善处理"三废"仍然是实验教学向绿色化迈进的主要措施,在此基础上通过实验方法、实验技术的不断改革最终实现化学实验的绿色化。