摘要：出水氨氮作为衡量污水处理厂水质处理工艺的重要指标之一,准确预测污水处理厂出水水质中的氨氮含量对于及时调整处理工艺,保障水环境安全有着重要的作用。提出了一种基于联合多空间维度(Multi-spatial Dimensional Cooperative Attention)改进的双向长短期记忆网络(Bi-directional Long Short-Term Memory,BiLSTM)的水质预测模型,首先通过皮尔逊(Pearson)系数法筛选出与出水氨氮相关性较强的总氮、污泥沉降比和温度3个指标作为模型输入,联合3个维度的强相关信息对未来6 h的出水氨氮进行预测。结果表明,MDCA-BiLSTM模型在融合残差序列后对出水氨氮的预测准确率R2为0.979,并在太平污水处理厂和文昌污水处理厂两个站点收集到的数据集上总氮、总磷和溶解氧的均方根误差分别为0.002、0.003、0.001和0.004、0.003、0.002;预测精度分别为0.959、0.947、0.971和0.962、0.951、0.983;与BiLSTM相比,均方根误差分别降低了0.007、0.007、0.007和0.017、0.006、0.005;预测精度分别提高了0.176、0.183、0.258和0.098、0.109、0.11。同时,该模型在面对未来6、12和24 h的预测步长时,仍能够达到0.956、0.933和0.917的预测精度,说明改进后的模型在预测准确性和鲁棒性方面表现出显著优势。该方法能够有效提高污水处理厂出水氨氮的及其他指标的预测准确性,可作为水资源循环和管理决策的一种有效参考手段,具有较强的实际应用价值。

摘要：通过调研,在云南省能耗总量和强度现状调查的基础上,预实验设计一款能源分析预警系统,可以对地区能源消费强度和总量做到准确的判断和预警。通过对企业用能情况原始数据的输录,利用后台的计算模块,进行分析和规划,为企业提供出科学有效的解决方案,同时也为政府的统筹管理提供了很大便利,提高了办公效率。本系统将在相关专业领域的人才和部门支持下,通过整合和开发资源,充分利用现代互联网技术,建立起能源分析预警系统,在原有相关本门检测和规划的基础上,突出互联网的便利性、高效性,细分专业门类,开发相应的计算模块,并结合国家和地方政府“十四五”的相关政策要求,做出专业系统的规划分析和预警,努力提高地区能源管理质量和水平。该分析预警系统预采用响应式网页设计技术,支持通过PC设备正常浏览、兼容目前市场主流浏览器(Internet 9+、Chrome、Firefox、360、Opera等)操作系统平台以及自适应屏幕尺寸大小,快捷准确地在PC设备上显示和运行,利用简洁明了的输入界面,使用户不再局限于专业领域的专家,从而让地方和企业的能源分析规划及预警工作开展更加便利、高效,大大推动了地方和国家的绿色发展。

摘要：Soil phosphomonoesterase plays a critical role in controlling phosphorus(P) cycling for crop nutrition,especially in P-deficient soils.A 6-year field experiment was conducted to evaluate soil phosphomonoesterase activities,kinetics and thermodynamics during rice growth stages after consistent swine manure application,to understand the impacts of swine manure amendment rates on soil chemical and enzymatic properties,and to investigate the correlations between soil enzymatic and chemical *** experiment was set out in a randomized complete block design with three replicates and five treatments including three swine manure rates(26,39,and 52 kg P ha^(-1),representing low,middle,and high application rates,respectively) and two controls(no-fertilizer and superphosphate at 26 kg P ha^(-1)).The results indicated that the grain yield and soil chemical properties were significantly improved with the application of P-based swine manure from 0 to 39 kg P ha^(-1);however,the differences between the 39(M_(39)) and 52 kg P ha^(-1) treatments(M_(52)) were not *** enzymatic property analysis indicated that acid phosphomonoesterase was the predominant phosphomonoesterase in the tested *** M_(39) and M_(52) treatments had relatively high initial velocity(V_0),maximal velocity(V_(max)),and activation grade(lgN_a) but low Michaelis constant(K_m),temperature coefficient(Q_(10)),activation energy(E_a),and activation enthalpy(ΔH),implying that the M_(39) and M_(52) treatments could stimulate the enzyme-catalyzed reactions more easily than all other *** correlation analysis showed that the distribution of soil phosphomonoesterase activities mainly followed the distributions of total C and total *** on these results,39 kg P ha^(-1) could be recommended as the most appropriate rate of swine manure amendment.

摘要：A novel n-type junctionless field-effect transistor(JLFET) with a step-gate-oxide(SGO) structure is proposed to suppress the gate-induced drain leakage(GIDL) effect and off-state current I_(off).Introducing a 6-nm-thick tunnel-gateoxide and maintaining 3-nm-thick control-gate-oxide,lateral band-to-band tunneling(L-BTBT) width is enlarged and its tunneling probability is reduced at the channel-drain surface,leading the off-state current I_(off) to decrease ***,the thicker tunnel-gate-oxide can reduce the influence on the total gate capacitance of JLFET,which could alleviate the capacitive load of the transistor in the circuit *** simulation shows that I_(off) of the new optimized JLFET reduced significantly with little impaction on its on-state current Ion and threshold voltage V_(TH) becoming less,thus showing an improved I_(on)/I_(off) ratio(5×10^(4)) and subthreshold swing(84 mV/dec),compared with the scenario of the normal *** influence of the thickness and length of SGO structure on the performance of JLFET are discussed in detail,which could provide useful instruction for the device design.

摘要：Spiro heterocycles frequently occur in bioactive molecules. In the pursuit of neonicotinoids with spiro hererocycles, three types of novel neonicotinoids with spirobenzofuranone, spirooxindole or spiroacenaphythylenone framework were designed and synthesized. Insecticidal evaluation showed that some of spirobenzofuranone containing neonicotinoids exhibited moderate activity against cowpea aphid, armyworm or brown planthopper.

摘要：[目的]探索川芎天麻镇痛、镇静作用的最佳配伍比例。[方法]按析因设计的方法设置16个不同的配伍比例。采用热板法与醋酸扭体法来观察各配伍比例对小鼠的镇痛作用;采用旷场实验与悬尾实验来观察各配伍比例对大鼠的镇静作用。[结果]川芎∶天麻为1∶3(3 g/kg)可以显著提高小鼠在热板实验中的痛阈值(P<0.01);川芎∶天麻为1∶4(3 g/kg)可以显著减少小鼠腹腔注射醋酸溶液后的扭体次数(P<0.01);川芎∶天麻为1∶4(2 g/kg)可以显著降低大鼠在旷场实验仪中的自主运动活性(P<0.01);川芎∶天麻为0∶4(2 g/kg)可以显著缩短大鼠在悬尾实验中的不动时间(P<0.01)。[结论]川芎、天麻配伍可以对小鼠和大鼠产生镇痛、镇静作用,其中川芎、天麻最佳配伍比例为1∶4。

摘要：Many rock avalanches were triggered by the Wenchuan earthquake on May 12, 2008 in southwest China. Protection galleries covered with a single soil layer are usually used to protect against rockfall. Since one-layer protection galleries do not have sufficient buffer capacity, a two-layered absorbing system has been designed. This study aims to find whether an expanded poly-styrol （EPS） cushion, which is used in the soil-covered protection galleries for shock absorption, could be positioned under dynamic loadings. The dynamic impacts of the two-layered absorbing system under the conditions of rock avalanches are numerically simulated through a 2D discrete dement method. By selecting reasonable parameters, a series of numerical experiments were conducted to find the best combination for the two- layered absorbing system. The values of the EPS layer area as a percentage of the total area were set as 0% （Sl）, 22~ （S2）, and 70% （$3）. 22~ of the area of the EPS layer was found to be a reasonable value, and experiments were conducted to find the best position of the EPS layer in the two-layered absorbing system. The numerical results yield useful conclusions regarding the interaction between the impacting avalanches and the two-layered absorbing system. The soil layer can absorb the shock energy effectively and S2 （0.4-m thick EPS cushion covered with soil layer） is the most efficient combination, which can reduce the impact force, compared with the other combinations.

摘要：为解决互花米草入侵领域的训练数据匮乏,存在实体特征提取不准确的问题,提出一种融合数据增强的互花米草入侵关联要素识别深度学习模型。将训练数据采用同类实体随机交叉互换的方法进行数据增强,利用BERT预训练获得互花米草入侵关联要素的上下文信息;使用BiLSTM进一步提取特征,利用CRF得到实体的标签约束。通过对比不同模型在自建数据集上的精确率、召回率和F1分数,验证了该模型在互花米草入侵领域实体识别的有效性。

摘要：In order to discover highly active ecdysone analogs, a series of new substituted pyrazole amide derivatives were obtained using structure-guided optimization method and further screened for their insecticidal activities, in the basis of the core structures of the two active compounds N-（3-methoxyphenyl）-3-（tert-butyl）-1-phenyl-1H-pyrazole-5-carboxamide（6e） and N-（4-（tert-butyl）phenyl）-3-（tert-butyl）-1-phenyl-1H-pyrazole-5-carboxamide（6i）, previously presented by us. The chemical structures of the title compounds were identified by spectral analyses. The preliminary bioassay results indicated that one among the synthesized pyrazole derivatives, compound 34, endowed with good activity against Mythimna Separata at 10 mg/L, which was equal to that displayed by the positive control tebufenozide. In addition, examples of molecular docking and molecular dynamics studies demonstrated that 34 may be the potential inhibitor to Ec R and its docking conformation was similar to that of tebufenozide. In addition, increasing the hydrophobic effect and considering the suitable bulk effect on pyrazole ring are beneficial to the inhibiting activity to Ec R and activity in vivo.

摘要：封隔器卡瓦作为井下作业中关键的锚定部件,其性能直接影响井下作业的安全性和效率。本文系统分析了卡瓦几何参数对接触面积、接触应力和剪切应力的影响规律,提出通过优化几何参数(包括牙数、牙顶角、牙倾角、圆心角和咬入深度)提高卡瓦锚定性能的策略。研究采用有限元仿真并结合理论建模,发现增加牙数和咬入深度能显著提升接触面积并降低接触应力;而适当控制牙顶角和牙倾角则有助于降低局部应力集中现象,延长卡瓦的使用寿命。本文的研究成果不仅为封隔器卡瓦的优化设计提供了理论依据和数据支持,还对井下复杂环境中的锚定技术创新具有重要指导意义。