Simulation of Potential Production and Optimum Population Quantitative Indices for the Second Hybrid Rice

The article established the HDRICE model by modifying the structure of the ORYZA1 model and revising its parameters by field experiments. The HDRICE model consists of the modules of morphological development of rice, daily dry matter accumulation and partitioning, daily CO2 assimilation of the canopy, leaf area, and tiller development. The model preferably simulated the dynamic rice development because of the thorough integration of the effects of temperature and light on the rates of rice development, photosynthesis, respiration, and. other ecophysiological processes. In addition, this model has attainable grain yield in the test experiment that showed the potential yield of cultivar Xieyou 46 ranged from 11 to 13 tons ha-~. Besides, the model was used to optimize the combinations of the transplanting date, seedling age and density for cultivar Xieyou 46 at Jinhua area, and the population quantitative indices to attain the potential yield such as maximum stems, effective panicles, filled grain number/leaf area, and so on. The result showed that the combination of transplanting date on July 25, seedling age of 35 days and base seedling density of 1.33 x 106ha-1 is the optimum combination for the second hybrid rice production in Jinhua County, China. And the maximum stems, the effective panicles, the filled grain per panicle, the peak of optimum LAI, LAI in later filling stage, and the filled grain number/leaf were 6.03×10^6ha, 3.99×10^6ha, 119.2, 8.59, 5-6, and 0.64, respectively.

Assessment of toxicity potential of metallic elements in discarded electronics:A case study of mobile phones in China

The electronic waste (e-waste) is increasingly flooding Asia,especially China.E-waste could precipitate a growing volume of toxic input to the local environment if it was not handed properly.This makes the evaluation of environmental impact from electronics an essentially important task for the life cycle assessment (LCA) and the end-of-life management of electronic products.This study presented a quantitative investigation on the environmental performance of typical electronics.Two types of disposed mobile...

Potentially harmful metals,and health risk evaluation in groundwater of Mardan,Pakistan:Application of geostatistical approach and geographic information system

This study investigates the values of pH,total dissolved solids(TDS),elevation,oxidative reduction potential(ORP),temperature,and depth,while the concentrations of Br,and potentially harmful metals(PHMs)such as Cr,Ni,Cd,Mn,Cu,Pb,Co,Zn,and Fe in the groundwater samples.Moreover,geographic information system(GIS),XLSTAT,and IBM SPSS Statistics 20 software were used for spatial distribution modeling,principal component analysis(PCA),cluster analysis(CA),and Quantile-Quantile(Q-Q)plotting to determine groundwater pollution sources,similarity index,and normal distribution reference line for the selected parameters.The mean values of pH,TDS,elevation,ORP,temperature,depth,and Br were 7.2,322 mg/L,364 m,188 mV,29.6℃,70 m,0.20 mg/L,and PHMs like Cr,Ni,Cd,Mn,Cu,Pb,Co,Zn,and Fe were 0.38,0.26,0.08,0.27,0.36,0.22,0.04,0.43 and 0.86 mg/L,respectively.PHMs including Cr(89%),Cd(43%),Mn(23%),Pb(79%),Co(20%),and Fe(91%)exceeded the guideline values set by the world health organization(WHO).The significant R^(2)values of PCA for selected parameters were also determined(0.62,0.67,0.78,0.73,0.60,0.87,-0.50,0.69,0.70,0.74,-0.50,0.70,0.67,0.79,0.59,and-0.55,respectively).PCA revealed three geochemical processes such as geogenic,anthropogenic,and reducing conditions.The mineral phases of Cd(OH)_(2),Fe(OH)_(3),FeOOH,Mn_(3)O_(4),Fe_(2)O_(3),MnOOH,Pb(OH)_(2),Mn(OH)_(2),MnO_(2),and Zn(OH)_(2)(-3.7,3.75,9.7,-5.8,8.9,-3.6,2.2,-4.6,-7.7,-0.9,and 0.003,respectively)showed super-saturation and under-saturation conditions.Health risk assessment(HRA)values for PHMs were also calculated and the values of hazard quotient(HQ),and hazard indices(HI)for the entire study area were increased in the following order:Cd>Ni>Cu>Pb>Mn>Zn>Cr.Relatively higher HQ and HI values of Ni,Cd,Pb,and Cu were greater than one showing unsuitability of groundwater for domestic,agriculture,and drinking purposes.The long-term ingestion of groundwater could also cause severe health concerns such as kidney,brain dysfunction,liver,stomach problems,and even cancer.

DFT Studies on the Antiradical Potential of Phenolic Compounds

Phenolic compounds are a class of hazardous substances for human.To study the antiradical potential of a series of phenolic compounds from the aspect of position and substituent type,phenol,o⁃dihydroxybenzene(ODB),m⁃dihydroxybenzene(MDB),p⁃dihydroxybenzene(PDB),paranitrophenol(PNP),and o⁃chlorophenol(OCP)were selected as typical targets.In addition,to elucidate the degradation discrepancy of phenolic compounds,quantum chemical calculations(QCCs)were obtained using the B3LYP method along with a 6-311G(d,p)basis set.Calculations indicate that phenol,ODB,MDB,and PDB,with electron⁃donating groups,exhibited high antiradical potential,while PNP and OCP,with electron⁃withdrawing groups,exhibited low antiradical potential.The chemical indices calculations show that para⁃compounds and ortho⁃compounds had high antiradical ability.Moreover,phenol,ODB,MDB,and PDB possessed higher bond dissociation enthalpy(BDE)and lower adiabatic ionization potential(AIP)values compared with those of OCP and PNP.Medium effects,even in vacuo,were also taken into account to reveal the antiradical ability of phenolic compounds.

A Preliminary Study on Systems Engineering-Based Method for the Evaluation of Allelopathic Potential in Crops and Its Application

The objective of this study was to develop a method to assess and analyze the total allelopathic potential of crop germplasm and to test this method on four winter wheat accessions commonly planted in the Loess Plateau. A systems engineering model was developed and used to evaluate the total allelopathic potential of crop cultivars. In addition, a method for quantifying the total allelopathic potential in crop accessions was presented. Total allelopathic potential of four winter wheat accessions from the Loess Plateau was estimated and compared using a systems theory approach. The model assessed allelopathic potential in different parts of the plants from the time wheat turned green in spring until maturity. Results from these models indicated that the four wheat accessions had very weak allelopathic potential. Allelopathic potential declined in the order Xiaoyan 22 〉 Ningdong 1 〉 Fengchan 3 〉 Bima 1. This system engineering evaluation method allows for the assessment of allelopathic potential among crop varieties. It will help plant breeders to select and develop allelopathic crop accessions that combine weed suppression properties with agronomic traits related to yield and quality.

Primary study on evaluation index system for groundwater exploitation potentiality based on the niche theories

Based on the groundwater resources evaluation, the groundwater exploitation potentiality evaluation is aiming at providing references for management, planning and development of groundwater. Traditional evaluation methods mainly adopted individual indicator as a method which cannot fully reflect the affecting factors of the groundwater exploitation potential in a scientific way. The idea that the spatial distribution and dynamic change of groundwater is not only affected by socio-economic development and exploitation technology but also influenced by its regulation is coincided with the niche theory. This paper has preliminarily applied the niche theory to groundwater exploitation potential analysis, and proposed the concept of groundwater niche as well as its related definition, connotation and calculation formula. Meanwhile, by taking the Hebei Plain as an example, the article has made an evaluation of groundwater exploitation potentiality and a contrast with the results of the traditional evaluation methods on the construction of groundwater niche index system, and then verified the feasibility and rationality of this index system. It turns out that, it is truly comprehensive, scientific and rational to make groundwater niche calculation and exploitation potential analysis by using the evaluation index system. Niche theory has provided a new and fundamental attempt for the analysis and competition strategy for the groundwater exploitation potentiality evaluation.

基于相对联系数的区域水利高质量发展评价指标体系筛选方法

为综合判断在区域水利高质量发展目标、发展途径、发展条件相互作用下区域水资源-经济社会-生态环境复合系统不断协同优化的系统高质量发展水平状态,构建了由发展目标、发展途径和发展条件3个子系统组成的区域水利高质量发展初步评价指标体系。为定量分析初步评价指标体系的专家咨询信息,根据专家指标排序合理性模糊关系的取值区间特点提出了相对联系数,用相对联系数的平均集对势估计各专家指标排序合理性的权重,进而可得各指标重要性的专家综合排序值,据此筛选初步评价指标体系,构建了基于相对联系数的区域水利高质量发展评价指标体系筛选方法(SM-RCN)。SM-RCN在陕西省的应用结果表明:筛选后的指标体系汇聚了各专家对区域水利高质量发展主要影响指标的综合评判;SM-RCN可克服评价指标体系构建过程缺乏定量分析依据的不足,可识别不同专家、同一专家对不同评价方面的指标排序合理性的程度。该筛选方法在区域水利现代化、水资源空间均衡、水资源承载力等评价指标体系构建过程中具有应用前景。

不同代花粉饲料对蜂群采食量、群势及工蜂生理指标的影响

文章旨在研究不同代花粉饲料对蜂群采食量、群势及工蜂生理指标的影响。试验将16群蜂王繁殖力和工蜂数量相近的中华蜜蜂随机分为4组,每组4群。各组蜂群分别采用茶花粉(T0组)、玉米蛋白粉(T1组)、菜籽饼(T2组)、啤酒酵母(T3组)作为饲料原料。试验从春季繁殖期开始,共计60 d。结果表明:(1)4组蜂群的总采食量分别为1671.84、1972.84、1428.63、2298.47 g。其中,与T0组相比,T1组、T3组蜂群的总采食量显著提高了18.00%、37.48%(P<0.05)。(2)试验第20天,T3组蜂群群势显著高于T0组、T1组、T2组(P<0.05);试验第40天,T3组蜂群群势显著高于T0组、T2组(P<0.05);试验第60天,T1组、T3组蜂群群势显著高于T0组、T2组(P<0.05)。(3)4组蜂群工蜂初重分别为0.11、0.12、0.09、0.11 g。其中,与T2组相比,T0组、T1组、T3组工蜂初重显著提高了22.22%、33.33%、22.22%(P<0.05)。T1组成年工蜂头部蛋白质含量显著高于T0组和T2组(P<0.05)。由此可见,用玉米蛋白粉、啤酒酵母作为饲料原料,能增加蜂群采食量,促进蜂群群势增长,改善工蜂生理指标;用菜籽饼作为饲料原料会降低工蜂初重。

中国自然资源综合潜力评价指标体系初探

兼顾自然资源统一和分类的行政管理需求,基于资源属性、自然条件及灾害风险等维度评价土地、森林、草原、湿地和水资源5类资源的开发潜力,并在此基础上构建了系统、合理和客观的自然资源综合潜力评价指标体系。结合多源统计数据和遥感数据,对中国省级自然资源综合潜力进行评价,并利用主导因素法进行潜力分区。实证结果表明,西部地区、长江中下游地区和东北地区具有较高的自然资源综合潜力;北京、天津等快速城镇化区域自然资源综合潜力较低,需发挥其经济发展优势。提出的自然资源综合潜力评价指标体系适用于不同尺度区域的自然资源开发潜力评估,并能有效识别地区优势自然资源类型,为地方自然资源管理和主体功能区优化调整提供支撑。

市政污水处理厂碳减排潜力评估的方法与应用

碳减排潜力评估是实现市政污水处理厂碳中和的基础。构建了包含4类46项技术的碳减排技术库,基于层次分析法和问卷调查建立了碳减排潜力评估指标体系,评估了碳减排技术的可行性,为市政污水处理厂碳中和路径研究提供参考。结果表明,运行管理类、资源循环类、工艺选择类、清洁能源类技术有可能应用的比例分别为62.5%、62.5%、50.0%、30.0%,其中,加药泵变频控制技术、提升泵变频控制技术、关键设备的能源效率管理系统是现阶段可行性最高的碳减排技术;以某地方水务集团27座污水处理厂为案例,根据碳减排潜力评估结果由高到低将污水处理厂归纳为碳中和潜力型、能源依赖型和传统挖潜型,以上各类型污水处理厂占比分别为3.7%、63.0%、33.3%,针对不同类型污水处理厂提供了相应的碳减排可行技术建议。

Research progress on the electrophysiological indicators to predict the efficacy of vagus nerve stimulation for drug-refractory epilepsy

Vagus nerve stimulation(VNS)is an important treatment option for drug-refractory epilepsy(DRE),with well-established efficacy and safety in clinical practice for more than 20 years.However,it is very difficult to find the optimal electrophysiological indicators for the effectiveness of VNS on DRE because the mechanism of action is unknown.In this review,we provide an update of the potential applications of VNS outcomes in patients with drug-resistant epilepsy.Electroencephalographic(EEG)activity,event-related potentials,EEG synchronization levels,magnetoencephalographic,laryngeal muscle evoked potentials,and heart rate variability are potential biomarkers for VNS outcomes in people with DRE.

Distribution, Mobility, and Health Risks Assessment of Trace Metals in River Sediments from Intense Agricultural Activity Areas in West Africa

The economy of West African countries is mainly based on agriculture. However, the trace metal(loid)s contamination status in rivers is relatively unknown in the region. In this work, 45 surface sediments collected from the Bandama, Comoé, and Bia Rivers in south and south eastern Côte d’Ivoire (West Africa), were analyzed for total metal concentrations and chemical speciation. The results showed that the river sediments were considerably contaminated by Cd and moderately contaminated by As, Cu, Pb, and Zn. Significant spatial variations were observed among the stations but not between the rivers. Metals Cd and Cu were likely to cause more ecological risks. The speciation analysis unravelled that the metal(loid)s partitioned mainly in the residual fraction, with the potential mobile fraction varying from 14% to 28%. The study calls for establishment of strict policies relative to the application of fertilizers and agrochemicals and mining activities to protect the environment and human health risks.

腹膜透析患者病耻感异质性的潜在剖面分析及预测指标研究

目的探究腹膜透析患者疾病病耻感的潜在类别,并挖掘腹膜透析患者病耻感的预测指标。方法2024-02~04月采用方便取样法选取西安市4所三甲医院534例终末期肾脏病腹膜透析患者作为研究对象,采用一般资料调查表和疾病病耻感量表调查腹膜透析患者的病耻感状况。基于潜在剖面分析对腹膜透析患者病耻感状况进行类别分析,并采用有序多分类Logistic回归分析探索不同类别间的区分指标。结果腹膜透析患者病耻感特征可分为3种类别,分别为高病耻感组(n=235)、中病耻感组(n=219)、低病耻感组(n=80),占比分别为44.01%、41.01%,14.98%。女性(OR=3.678,P=0.027)、退休(OR=0.701,P=0.020)、无业(OR=0.556,P=0.016)是中病耻感组的预测指标;女性(OR=4.047,P=0.015)、退休(OR=0.430,P=0.037)、无业(OR=0.331,P=0.041)是高病耻感组的预测指标。结论腹膜透析患者病耻感存在明显不同的分类特征,性别、职业状态是预测中病耻感和高病耻感腹膜透析患者的预测因素。医护人员应根据患者人口学特征给予针对性的心理干预策略,尤其关注腹膜透析职业女性群体心理健康状况。

基于ESG的造纸行业可持续发展潜力评价与优化

造纸行业可持续发展潜力主要通过ESG指标来评价,通过ESG体系的推行可以有效提升企业的管理能力,促进企业的可持续发展。对此,通过环境、社会、治理三个方面对造纸行业的可持续发展的潜力进行了评价与优化。在环境方面,企业需要通过技术创新提高资源利用率,减轻环境负担。在社会层面,企业需要关心企业员工的待遇和安全问题,加强管理,实现全方位的人权保护。在治理方面,企业则需要制定透明化的规章制度,实现决策的公平和公正。通过设备的升级、技术的创新以及优化管理制度等手段,可以发挥造纸行业的可持续发展潜力,最终实现社会的健康、稳定、可持续发展。

Water-requirement Characteristics and Water-saving Irrigation Indices of Dry-raised Rice Seedlings in Paddy Field

The dry-raised seedlings (D-RS)of rice had obvious superiority in tillering and growth after transplanting. Especially under the condition of water-saving irrigation or low soil moisture, D-RS had more productive tillers, higher dry matter accumulation, larger grain-filling rate, slower senescence of leaves and stronger root activity during ripening, and higher grain yield, compared with the moist-raised seedlings (MRS). D-RS had smaller yield reduction than M-RS when subject to heavy water stress. The results suggested that D-RS had the ability to adapt to lower soil moisture in paddy field. Basedon the response of D-RS to soil moisture at each growth stage, the water-saving and high-yielding irrigation indices through controlling lowlimit soil water potential were proposed, i.e. soil water potential was - 15 - - 20 kPa from the recovery to the criticalleaf-age of productive tillering, - 20 - - 40 kPa from the critical leaf-age of productive tillering to secondary branch-differentiating stage, - 15 - - 25 kPa from secondary branch-differentiating stage to 20 days after heading and - 25 - - 35 kPa from 21 to 45 days after heading.

区间数直觉模糊多属性决策的联系数新算法

针对区间直觉模糊多属性决策的模糊不确定问题,提出一种基于联系数的区间直觉模糊多属性决策新算法。首先把区间数转换成a+bi型的二元联系数,把区间直觉模糊数转换为a+bi形式的直觉模糊数;再参照三元联系数的势函数概念计算直觉模糊数的直觉模糊势,建立基于直觉模糊势的多属性决策模型,依据模型中的综合加权直觉势大小得出n个方案的初排序,依据模型中的综合加权模糊势做初排序的不确定性分析得到终排序。实例应用结果证实了新算法思路的合理性和结果的有效性。

江苏省南京市西横山金矿床地质特征及找矿潜力

西横山金矿床位于长江中下游铁、铜、金、多金属成矿带。矿体主要呈脉状、透镜状赋存于构造破碎带中。矿石类型以氧化矿石为主,成矿元素以金为主,局部共、伴生铜、银。矿石呈粒状结构、包含结构、交代结构等,细脉状构造、浸染状构造、团块状构造等。褐铁矿化、硅化、碳酸盐化、泥化等蚀变较强。矿体成因类型以构造破碎带型为主,局部发育接触交代型。北西向、近东西向断裂构造破碎带和北东向层间构造破碎带为重要的导矿和容矿构造,Au异常与地表矿化吻合是直接找矿标志。采用含矿率法对控制程度较低的构造破碎带进行了资源潜力评价,结果表明矿区有望勘获大型金矿床。综合研究认为,该矿区成矿地质条件优越、物化探异常良好,找矿线索明显,资源潜力巨大。

基于多维视角的学科潜力分析与实践研究

“双一流”建设背景下,图书馆学科分析工作可以为学校职能部门提供学科整体概况,为学科发展规划提供数据支持。但目前学科分析工作在研究范畴、研究数据、学科分类、评价指标等方面存在着一定的问题和不足。天津师范大学开展了全方位多角度的学科潜力分析,全面获知学科发展的真实情况、优势和不足,研究内容包括潜力学科识别、学科结构分析、论文绩效指标分析、单篇论文主题定位、学科施引文献分析、作者和学院贡献度分析、学科动态追踪、竞争机构对比以及ESI全球排名前1%学科入围难度分析,以期为高校图书馆学科分析工作提供参考。

人工增雨(雪)三要素作业潜力指标分析及其应用

对2015—2016年秋冬季4次小雨过程云中液水含量、地面降水量和近地面大气细颗粒物浓度PM_(2.5)三要素观测资料统计,得到47个数据组个例,根据冷云催化和天气动力学原理,在对47例增雨(雪)潜力定性分析基础上,结合大气污染数值模拟结果对三要素关联性进一步综合分析,探讨和研究了三要素组合的潜力量化指标。即地面未降水时作业潜力指标为:1.5>N>0.1,PM_(2.5)<78;2.5>N>1.5,PM_(2.5)<86;N>2.5,PM_(2.5)<93。地面降水时的作业潜力指标为:1.5>N>0.1,R<1.9,PM_(2.5)<78;2.5>N>1.5,R<2.6,PM_(2.5)<86;N>2.5,R<2.8,PM_(2.5)<93(其中N、R、PM_(2.5)分别为小时云中液水含量、地面降水量和近地面细颗粒物浓度)。采用C#.net编程技术,开发了三要素潜力分析平台并投入业务应用。利用2018—2021年39次小雨过程对三要素潜力指标进行分析和验证,分析平台均适时输出潜力判别结果,经统计准确率达87%;选取2019年4月13日一次作业实例,对大气污染条件下的降雨过程结合三要素潜力等综合分析,取得预期效果,为人工增雨(雪)科学作业决策提供了依据。

基于CEEMDAN的压裂装备潜在性故障诊断模型

压裂装备的运行受力学负载作用,易出现潜在性故障。为保证压裂装备稳定运行,构建一种基于CEEMDAN的压裂装备潜在性故障诊断模型。按照CEEMDAN分解原则求解排列熵参数,确定压裂装备潜在性故障序列分解条件。提取潜在性故障的鲁棒局部均值,定义诊断模型的瞬态特征,并联合其他关联诊断条件完成压裂装备潜在性故障诊断。实验结果表明,应用构建模型后,故障灯亮起时的力学载荷作用仅为5.7×10^(9)N,诊断结果与发生潜在性故障时的压裂装备额定载荷作用条件相同,符合精确诊断的实际应用需求。