Advances in Microbial Remediation on the Application of Heavy Metal Pollution in Agricultural Water Resources

Heavy metal pollution in agricultural water resources is very serious in re- cent years, resulting in large losses of the agricultural economy and endangering human life and health. Due to the advantages of low cost, high efficiency and less secondary pollution, microbial ramediation technology is widely used in the treatment of heavy metal pollution in agricultural water resources. At present, with the progress of modern biotechnology, microbial remediation of heavy metals in agricul- tural water resources has grown rapidly. The sources and status quo of heavy met- al pollution in agricultural water resources at home and aboard, and the principles of microbial remediation of heavy metals pollution in agricultural water resources were reviewed in this paper, as well as the several common microbial remediation technology of heavy metals in agricultural water resources. Additionally, the further research work of heavy metal contaminated agricultural water resources by microbial ramediation were prospected.

The Allocation of Production orders to offshore Plants in the Clothing Industry: Part 2-Prototype System Supporting Order Allocation Decisions

This part demonstrates a prototype system which has been constructed to enable the allocation of orders of different product types to different manufacturing locations . ’ What - if’ experiments using this system show that different allocation rules would provide different outcomes in terms of the number of unallocated orders. A high number of unallocated orders will have a direct Impact on workload. Further research effort is necessary to channel into the exercbe of production order allocation with particular reference to allocation rules.

Unequal decoding power allocation for efficient video transmission

We present an unequal decoding power allocation （UDPA） approach for minimization of the receiver power consumption subject to a given quality of service （QoS）, by exploiting data partitioning and turbo decoding. We assign unequal decoding power of forward error correction （FEC） to data partitions with different priority by jointly considering the source coding, channel coding and receiver power consumption. The proposed scheme is applied to H.264 video over additive white Gaussion noise （AWGN） channel, and achieves excellent tradeoff between video delivery quality and power consumption, and yields significant power saving compared with the conventional equal decoding power allocation （EDPA） approach in wireless video transmission.

Dual Power Allocation Optimization Based on Stackelberg Game in Heterogeneous Network with Hybrid Energy Supplies

In heterogeneous network with hybrid energy supplies including green energy and on-grid energy, it is imperative to increase the utilization of green energy as well as to improve the utilities of users and networks. As the difference of hybrid energy source in stability and economy, thus, this paper focuses on the network with hybrid energy source, and design the utility of each user in the hybrid energy source system from the perspective of stability, economy and environment pollution. A dual power allocation algorithm based on Stackelberg game to maximize the utilities of users and networks is proposed. In addition, an iteration method is proposed which enables all players to reach the Stackelberg equilibrium(SE). Simulation results validate that players can reach the SE and the utilities of users and networks can be maximization, and the green energy can be efficiently used.

Analytical Modeling of Disaster-induced Load Loss for Preventive Allocation of Mobile Power Sources in Urban Power Networks

Continuous power supply of urban power networks(UPNs)is quite essential for the public security of a city because the UPN acts as the basis for other infrastructure networks.In recent years,UPN is threatened by extreme weather events.An accurate modeling of load loss risk under extreme weather is quite essential for the preventive action of UPN.Con-sidering the forecast intensity of a typhoon disaster,this paper proposes analytical modeling of disaster-induced load loss for preventive allocation of mobile power sources(MPSs)in UPNs.First,based on the topological structure and fragility model of overhead lines and substations,we establish an analytical load loss model of multi-voltage-level UPN to quantify the spatial dis-tribution of disaster-induced load loss at the substation level.Second,according to the projected load loss distribution,a preventive allocation method of MPS is proposed,which makes the best use of MPS and dispatches the limited power supply to most vulnerable areas in the UPN.Finally,the proposed meth-od is validated by the case study of a practical UPN in China.

The Allocation of Production Orders to Offshore Plants in the Clothing Industry:Part1-Model Conceptualisation

As a rough cut planning exercise,production order allo-cation for offshore manu facturing sites in the clothingindustry has received little attention as does other typesof planning like production planning.This paper outlinesan investigation into the exercise of production order al-location in the clothing industry.We have identified thatpractitioners involving in this exercise are not unanimousin the selection of offshore sites.Part 1 presents thebackground,objectives,process and conceptual model ofproduction order allocation.

Relation between Economic Development Level and Resource and Environment Carrying Capacity of Central Area of Yunnan Province Based on Decoupling Analysis

Based on the decoupiing theory and method, an indicator system was built for the relation between economic development level and resource and environment carrying capacity. And the study was carried out on decoupling degree and temporal changes of economic development level and resource and environment carrying ca- pacity in the central area of Yunnan Province. Results indicated that （i） the economic development level and resource and environment carrying capacity in the central area of Yunnan Province mainly experienced strong decoupling, weak decoupling, and ex- pansive negative coupling, and in general it was strong decoupling, and it took on re- verse ＂N＂ in temporal changes. （ii） Change rate of economic development level in the central area of Yunnan Province was greater than zero, but the amplitude of change was not large, while the change rate of resource and environment carrying capacity was negative in 2007-2008, and it was positive in the rest years; from 2007, it took on gradual expansion trend, and scissors difference gradually increased after experi- encing reverse ＂V＂ change. （iii） The strong decoupling was the main situation and it reached the peak value in T5 period and T6 pedod.

数字金融能缓解中小企业融资约束吗?——来自中小板上市企业的经验证据

作为数字技术与金融创新深度融合的产物,数字金融为缓解中小企业融资约束提供了可能。基于2012—2020年中小板上市企业的数据,实证检验了数字金融对中小企业融资约束的影响效应及机制效应。研究结果显示:数字金融对于缓解中小企业融资约束具有长期驱动作用;结构效应表明数字金融覆盖广度、使用深度是主要驱动力;异质性分析表明数字金融在大规模企业、高信息披露质量企业、制造业以及经济欠发达地区的驱动作用更强;机制分析显示数字金融能够通过提高金融资源配置效率、降低中小企业融资成本两大渠道缓解中小企业融资约束。

阿勒泰市移动源排放清单及时空分布特征

通过“自上而下”调查方式获取移动源活动水平,采用排放因子法建立了阿勒泰市移动源排放清单,并进行移动源排放的时空特征分析和清单不确定性分析。结果表明,2021年阿勒泰市移动源9种大气污染物排放总量,CO为669.12 t,NO_(x)为617.92 t,SO_(2)为29.85 t,NH_(3)为32.61 t,VOCs为136.35 t,PM_(2.5)为35.74 t,PM_(10)为38.06 t,BC为20.33 t,OC为6.41 t。其中,CO、SO_(2)、NH_(3)、VOCs主要来源于载客汽车,贡献率均超过40%;NO_(x)主要来源于农业机械和载货汽车,贡献率均超过30%;PM_(2.5)、PM_(10)、BC、OC主要来源于农业机械,贡献率均超过75%。时空分布特征表现为6—8月排放量最高,人口密集的市区排放量高于其他区域。移动源9种污染物排放清单不确定性均在−39.23%~56.27%以内,本清单计算结果相对可靠。

健康信息甄别中任务难度对大学生APP使用行为的影响

研究查询页、搜索引擎结果页和详情页面中的用户行为,有助于揭示用户健康信息搜索行为机理,优化健康信息甄别服务策略。研究招募了32名用户完成两种不同难度的健康信息甄别任务,基于开放性编码获取用户使用的APP类型,以甄别过程中的查询页、搜索引擎结果页和详情页及用户主观感知有用并进行截图的页面为信息载体,从信息源选择和认知资源分配策略两个维度深入剖析用户APP使用行为。结果表明,任务难度对社区类APP的信息源选择影响显著,表现为高难度任务中用户访问的各类页面数量均更多,截图采用的信息也更多。同时,任务难度对健康类APP的认知资源分配策略影响显著,表现为高难度任务中用户会付出更多的认知资源在详情页上,减少其在查询页上认知资源分配比率,且此时的信息采用率也更高。据此,本研究揭示了健康信息甄别中任务难度对用户APP使用行为具有内外智力资源的“同步唤醒”作用,验证了健康信息甄别中的媒介依赖和权威依赖现象。

源网荷储协调参与的运行备用容量分配策略及优化模型

为提升高比例新能源电力系统备用充裕性和实现大规模新能源高效消纳,将备用资源来源拓展至源网荷储,从调节方向、参与方式等方面量化源网荷储灵活调节资源可提供的运行备用水平。进而,根据“常规时段同步机组承担、特殊时段多类型资源分摊”的调控思路,提出了源网荷储协调参与的运行备用容量分配策略,构建了纳入多类型异质资源的备用分布优化模型,实现各类型备用资源在“全网-同类资源-机组/场站”的逐级精细化分配。基于某省级电网开展算例测试,与现有运行备用分配准则进行比较,验证了所提策略的有效性。

基于?分析的热电联产能耗一致性评价方法

现有热电联产能耗评价“好处归热”或“好处归电”,将节能效益单一划分给发电或供热,不能合理反映热、电两种能量的品位差异。为弥补上述不足,将蒸汽划分为凝汽流和供热流,把循环?损失依据产生根源分摊到发电和供热上,通过?分析建立电、热产品定量统一表征方法和电热能耗一致性表达式。用能质系数简化动态过程计算,将基于?分析的热电联产单耗分析模型拓展至描述电热能耗的时空分布。通过实际案例验证新算法合理性。结果表明:供热流向热网水释放的?与循环?损失构成供热量;热电联产通过回收冷源?供热和能质匹配实现发电侧和供热侧节能。能耗一致性评价方法可合理反应电热两种产品的能量品位,揭示热电联产发挥节能潜力的途径。

混合NOMA/OFDMA可见光通信系统资源分配算法

为了进一步降低混合非正交多址/正交频分复用多址(NOMA/OFDMA)技术的多用户多小区可见光通信系统的误码率,提出了一种功率和子载波的联合分配算法。该算法以最小化系统误符号率为优化目标,实现了子小区间载波和用户功率的联合最优分配。首先,理论推导出系统的误符号率表达式;然后,使用Matlab软件进行仿真,模拟可见光通信系统模型,并借助遗传算法得到最优的分配结果;最后,将该算法与现有的算法进行了对比。仿真结果表明,所提算法的误符号率性能更优。

基于动态博弈模型的多水源-多用户水价定价机制研究——以义乌市为例

水价是促进水资源合理配置的一个重要杠杆,关系到经济社会的健康发展,科学合理制定水价是实现健康有序发展的核心。当前我国水价的制定由于核准机制难以统一、成本形成时间不同、多水源-多用户的科学比价关系尚未建立等原因难以解决复杂的水资源配置问题。为推进分质供水和再生水利用,实现优质优价,发挥水价机制在多水源配置中的调节作用,建立科学合理的多水源-多用户均衡水价体系势在必行。本文从水价定价市场化的视角出发,充分考虑了多水源市场的供需状况、供求主体和其地因素在多水源定价过程中的作用机理,并以义乌市为例,构建地方政府、供水企业与用水户分别居于主导的Stackelberg博弈模型,对比分析了3个主体在不同情况下的均衡价格与收益。结果表明:在用水户占主导的情况下,多水源水价价格最低,供水企业占主导地位的情况下,总体收益最高,得到的价格体系为水库水-居民用户5.63元/m^(3),水库水-非居民用户6.20元/m^(3),水库水-特种用户6.21元/m^(3),河道水-非居民用户3.34元/m^(3),再生水-居民用户2.95元/m^(3),再生水-非居民用户3.06元/m^(3)。此价格体系可以实现供水企业盈利合理、用水户支付合理和水资源配置合理的均衡目标,为实现水资源市场化定价提供理论依据,同时为这一领域的后续研究提供思路参考。

减源(叶)对高寒草地狼毒生长和繁殖适合度的影响

【目的】探究减源(叶)对狼毒个体营养生长和繁殖适合度的影响,从资源分配策略的角度理解高寒草地狼毒的生态适应机制。【方法】以祁连山东缘高寒草地狼毒(Stellerachamaejasme)自然种群为研究对象,通过对狼毒个体进行减源(叶)处理,分析不同处理对狼毒个体的株高、小花数和结籽数的影响。【结果】在个体水平上,减源处理对狼毒分枝营养生长的影响不显著,但显著降低了个体的繁殖适合度(P<0.001)。在分枝水平上,减源处理会显著抑制剪叶分枝自身的营养生长(P<0.001)和繁殖(P<0.05);同时,显著促进了同株不剪叶分枝的营养生长(P<0.05),一定程度上降低了同株不剪叶分枝的繁殖适合度。【结论】在资源限制条件下,狼毒株丛遵循最优化分配理论,在株丛水平会采取降低个体的繁殖投资、保证自身存活的生活史对策;在分枝水平会把更多的资源分配给有利于维持植株营养生长的分枝。

基于零空间的船舶自主靠泊自抗扰控制分配

[目的]针对船舶自主靠泊过程中遇到的环境载荷、岸壁效应、模型不确定以及控制分配误差等多源干扰的影响,提出一种基于零空间的自抗扰控制(ADRC)分配方法。[方法]首先,建立船舶靠泊运动数学模型、多源干扰模型和控制分配模型,并据此设计神经网络扩张状态观测器(NNESO)实时估计船舶运动及其所受到的多源干扰;然后,引入零空间技术设计控制分配算法,并基于该方法实现先泊位外镇定再平行靠泊方案;最后,证明船舶自主靠泊系统在所提方法下所有误差信号一致最终有界,保证船舶自主靠泊过程的安全性。[结果]仿真对比结果表明,所提方法在轨迹跟踪效果与二次规划(QP)法近似的情况下,求解所需时间为其1.3%,艏向最大分配误差为伪逆法(PI)的36.51%。[结论]所提方法在满足靠泊运动控制精度的同时,求解所需时间明显缩短,最大分配误差显著降低,保证了控制分配的实时性与精确性。

高有机氮废水处理系统总氮提标工程实例

河北某氨基酸生产企业生产废水中含有高浓度有机氮,原来的排水考核指标中无总氮,导致原有处理工艺未设计总氮去除单元。随着环保要求的提高,总氮被纳入企业排水考核指标,需对原有污水处理系统进行总氮去除提标改造。本工程基于碳源分配和土著微生物驯化的原理,最大限度的利用原污水处理设施及废水自身碳源对处理系统进行改造。系统改造后运营成本仅增加0.06元/m^(3),但总氮去除率提升至95%以上,出水总氮稳定在40 mg/L以下,满足工业园区污水处理厂收水标准(≤70 mg/L),为高有机氮废水总氮提标改造提供参考。

计及源-荷匹配的多区域多类型新能源系统优化规划方法

合理利用新能源出力互补性可平抑其出力波动性,在新能源规划中考虑互补性可令新能源规划布局更为合理。基于此,文中考虑新能源出力互补性,研究计及源-荷匹配的新能源系统优化规划方法,利用新能源总出力与负荷的正相关特性,保持新能源总出力与负荷的动态平衡。首先,基于源-荷匹配思想,提出描述新能源出力与负荷贴近程度的均衡度指标以及描述新能源出力与基准负荷一致程度的一致性指标。然后,建立计及源-荷匹配的多区域新能源系统优化规划模型,并通过引入新能源出力与负荷匹配均衡度约束来保证两者变化特性一致。最后,以我国北方4个区域的电网为例进行算例分析。研究结果表明,计及源-荷匹配的新能源系统优化规划可以综合考虑新能源消纳率和渗透率,为考虑新能源出力互补性的新能源规划布局提供解决方案。

2016-2021年我国中医卫生资源配置水平评价与区域差异分析

[目的]探究我国中医卫生资源配置水平的区域差异及演变趋势,为优化卫生资源配置提供参考。[方法]基于熵值法构建中医卫生资源配置水平综合评价指数,利用Dagum基尼系数和方差分解方法从空间和结构2个视角考察我国中医卫生资源配置水平的差异大小及来源。[结果]2021年我国中医卫生资源配置综合评价指数与2016年相比上升了76.92%,东中西部地区综合评价指数均值依次为0.261、0.252和0.339;样本期内我国中医卫生资源配置水平总体差异较小,基尼系数均值为0.269,超变密度是差异的主要空间来源,贡献率均值为40.28%,人力资源配置差异是差异的主要结构来源,贡献率均值为53.33%。[结论]中医卫生资源配置水平稳步提高,但总量不足;中医卫生资源配置水平的区域差异缩小,区域内存在两级分化现象,区域间差异有扩大化风险;中医卫生资源配置结构失衡,结构差异的贡献存在地区异质性。

考虑省间交易模式的新能源基地源-储协同外送优化及综合效益分配策略

在沙漠、戈壁、荒滩等区域建设大型新能源基地是实现“双碳”目标的重要举措。为了探究“双碳”目标下新能源基地如何实现经济、稳定的电力外送,采用日前-日内两阶段多时间尺度优化构建煤电、抽蓄、电化学储能协同新能源机组外送的调度方案,并基于省间交易机制对比不同交易模式的收益情况。同时,为了探究更具实操性的效益分配方案,基于外送调度计划对协同外送中各主体的成本及贡献进行分析,提出不同收益-成本比下的效益分配方案。研究结果显示,外送收益在省间常规电力交易和省间绿电交易两种模式下的收益大小受绿电价格、绿证价格和绿证出售概率影响,煤电、抽蓄和电化学储能机组对于新能源基地外送收益贡献率大于30%,且在省间常规电力交易模式下贡献率大于省间绿电交易模式下的贡献率。研究对新能源基地源-储协同外送调度优化、参与省间交易决策及收益分配有参考作用。