活性化学物质禁配体系和规则的研究

本研究结合化学危险物品实际管理和生产的需要，筛选了６００余种活性化学危险物品，按化学类别分为７Ｏ类，通过查询大量的资料，分析了化学结构与活性反应的关系、活性反应的特点及操作处置对活性反应的影响；归纳出了简明、实用的活性化学品禁配规则和禁配体系表，可作为化学危险物品生产、储存、运输等作业的安全指导通则，为《化学危险物品安全管理条例》的实施提供依据。

中西药配伍临床宜禁浅论

中药、西药配伍应用越来越普遍,中西药配伍禁忌尚缺乏权威资料。合成药与草药存在药物间的相互作用,或提高或降低其中一种药物的疗效或毒性,本文就中西药配伍总结归纳。

危险化学品活性反应危害及混配危险的规则研究

很多危险化学品在储存时发生爆炸等事故,调查发现有一大部分是由于不清楚危险化学品的反应活性及禁配特性而任意混放造成的。2006年,我们组织专家撰写此方面的文章对70类化学物质的活性反应特性及混配规则进行分析,将在本栏目连载,以期对危险化学品的储存、运输及使用等环节有指导意义。

采用静脉药物集中配制的优势

静脉药物集中调配在发达国家是医院药学工作必不可少的一部分,但在我国还是新生事物。为了静脉药物集中调配工作的顺利开展,为临床静脉输液探索最佳配制方法,本文通过列举与比较,阐述了采用静脉药物集中配制的优势。1采用静脉药物集中配制的必要性静脉输液具有见效快、利用度高、给药速度可控制等优点,是临床治疗和抢救患者的常用的给药途径。据统计我国今约80%以上住院患者、急诊患者采用此方法给药,而在我国90%以上的静脉输液需要加入药物。因此[1]。

国外危险化学品储存管理研究及启示

从对我国危险化学品储存管理现状的分析出发,研究对比了我国和国外在化学品储存管理方面的不同做法,提出我国化学品储存管理存在法律法规以及标准架构不完善,对小量储存、零售储存、运输前的中转储存以及废弃储存没有针对性的法律法规以及监管措施,缺乏混储禁配指导等问题,指出了补充完善化学品管理法律法规,对化学品从生产、使用、零售、中转以及废弃全生命环节制定相应的储存规定,加强各环节衔接之间的储存管理,引进或开发危险化学品混储指导软件,对提高我国化学品储存管理技术,促进化学品的储存安全监管具有重要现实意义。

Integrating Tabu Search in Particle Swarm Optimization for the Frequency Assignment Problem

In this paper, we address one of the issues in the frequency assignment problem for cellular mobile networks in which we intend to minimize the interference levels when assigning frequencies from a limited frequency spectrum. In order to satisfy the increasing demand in such cellular mobile networks, we use a hybrid approach consisting of a Particle Swarm Optimization(PSO) combined with a Tabu Search(TS) algorithm. This approach takes both advantages of PSO efficiency in global optimization and TS in avoiding the premature convergence that would lead PSO to stagnate in a local minimum. Moreover, we propose a new efficient, simple, and inexpensive model for storing and evaluating solution's assignment. The purpose of this model reduces the solution's storage volume as well as the computations required to evaluate thesesolutions in comparison with the classical model. Our simulation results on the most known benchmarking instances prove the effectiveness of our proposed algorithm in comparison with previous related works in terms of convergence rate, the number of iterations, the solution storage volume and the running time required to converge to the optimal solution.

Genetic algorithm for short-term scheduling of make-and-pack batch production process

This paper considers a scheduling problem in industrial make-and-pack batch production process. This process equips with sequence-dependent changeover time, multipurpose storage units with limited capacity, storage time, batch splitting, partial equipment connectivity and transfer time. The objective is to make a production plan to satisfy all constraints while meeting demand requirement of packed products from various product families. This problem is NP-hard and the problem size is exponentially large for a realistic-sized problem. Therefore,we propose a genetic algorithm to handle this problem. Solutions to the problems are represented by chromosomes of product family sequences. These sequences are decoded to assign the resource for producing packed products according to forward assignment strategy and resource selection rules. These techniques greatly reduce unnecessary search space and improve search speed. In addition, design of experiment is carefully utilized to determine appropriate parameter settings. Ant colony optimization and Tabu search are also implemented for comparison. At the end of each heuristics, local search is applied for the packed product sequence to improve makespan. In an experimental analysis, all heuristics show the capability to solve large instances within reasonable computational time. In all problem instances, genetic algorithm averagely outperforms ant colony optimization and Tabu search with slightly longer computational time.

Network Reconfiguration for Load Balancing in Distribution System with Distributed Generation and Capacitor Placement

This paper presents an efficient algorithm for optimization of radial distribution systems by a network reconfiguration to balance feeder loads and eliminate overload conditions. The system load-balancing index is used to determine the loading conditions of the system and maximum system loading capacity. The index value has to be minimum in the optimal network reconfiguration of load balancing. The tabu search algorithm is employed to search for the optimal network reconfiguration. The basic idea behind the search is a move from a current solution to its neighborhood by effectively utilizing a memory to provide an efficient search for optimality. It presents low computational effort and is able to find good quality configurations. Simulation results for a radial 69-bus system. The study results show that the optimal on/off patterns of the switches can be identified to give the best network reconfiguration involving balancing of feeder loads while respecting all the constraints.

Tabu search based resource allocation in radiological examination process execution

Efficient resource scheduling and allocation in radiological examination process （REP） execution is a key requirement to improve patient throughput and radiological resource utilization and to manage unexpected events that occur when resource scheduling and allocation decisions change due to clinical needs. In this paper, a Tabu search based approach is presented to solve the resource scheduling and allocation problems in REP execution. The primary objective of the approach is to minimize a weighted sum of average examination flow time, average idle time of the resources, and delays. Unexpected events, i.e., emergent or absent examinations, are also considered. For certain parameter combinations, the optimal solution of radielogical resource scheduling and allocation is found, while considering the limitations such as routing and resource constraints. Simulations in the application case are performed. Results show that the proposed approach makes efficient use ofradiological resource capacity and improves the patient throughput in REP execution.

Ultrawide-bandgap(6.14 eV)(AlGa))_(2)O_(3)/Ga_(2)O_(3)heterostructure designed by lattice matching strategy for highly sensitive vacuum ultraviolet photodetection

One judiciously designed strategy of utilizing an ultrathin but conductive Ga_(2)O_(3):Si nanolayer to prepare(AlGa)_(2)O_(3)crystalline film is demonstrated.Benefiting from the existence of Ga_(2)O_(3):Si nanolayer,a high-quality(Al_(0.68)Ga_(0.32))_(2)O_(3)sesquioxide film with 68 at.%aluminum was epitaxially grown on sapphire substrates,which was characterized by high-resolution transmission electron microscopy,X-ray photoelectron spectroscopy and X-ray diffraction.Its bandgap was broadened to 6.14 eV,and a vacuum ultraviolet(VUV)(AlGa)_(2)O_(3)/Ga_(2)O_(3):Si photodetector was subsequently fabricated.The detector exhibits a pretty high on-off ratio of about 10^(3),an open-circuit voltage of 1.0 V and a responsivity of 8.1 mA W^(-1) at 0 V bias voltage.The performances imply that the proposed strategy is valuable for improving the quality and also adjusting the bandgap of(AlGa)_(2)O_(3)sesquioxides,which is expected to facilitate their application in VUV photodetection.