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Abstract: Three varieties of quinoa (Jinli 1, Jinli 2 and Jinli 3) were selected, and 50 mL of boric acid solution with 0% (CK), 0.1% (B1), 0.2% (B2), and 0.3% (B3) was sprayed twice on the leaves during the jointing stage to study the effect of boron on the nutritional composition of quinoa leaves.The results showed that the contents of soluble protein, soluble sugar and Vitamin E were different in the experiment. The nutrients of quinoa were affected significantly with different boron concentrations. The soluble protein content of the three types of quinoa was increased gradually with the increasing of boron concentration, the highest point at B3 in the mature stage. The soluble protein content of the three types of quinoa at B3 was 49.28%, 43.77% and 17.35% higher than that of CK, respectively. The soluble sugar content of quinoa increased within a certain boron concentration, it increased first and then decreased, and reached the highest level at B2 in the grouting period. The soluble sugar content of the three types of quinoa at B2 was 16.24%, 38.18% and 41.52% higher than that of CK, respectively. The Vitamin E content of three types of quinoa increased with a suitable concentration of boron, which higher than that of the treatment without boron. The Vitamin E content was the highest in the booting stage. The Vitamin E content of Jinli No.1 at B3 was higher 39% than that of CK, and the vitamin E contents in Jinli No.2 and Jinli No.3 at B2 increased by 24% and 37%, respectively, compared with CK. The contents of soluble protein, soluble sugar and Vitamin E of quinoa treated with B1,B2 and B3 were higher than that of CK. In practice, 0.3% borax was the best choice, and quinoa leaves were selected according to the needs of its nutrients. [ABSTRACT FROM AUTHOR]

A low-carbon supply chain system composed of manufacturers and retailers with both production and emission reduction financing constraints was built. Aiming at bank loaning and prepayment, manufacturers’ financing decision under carbon cap-and-trade was explored, and the effect of carbon abatement cost coefficient and carbon trading price on supply chain members’ financing decision and profit was analyzed. The results showed that when the prepayment interest rate is equal to the bank interest rate, whether carbon cap-and-trade is considered or not, prepayment will always bring greater profit to manufacturers. Therefore, prepayment is the best choice for manufacturers. When the financing rate is unequal, manufacturers’ financing methods will be affected by carbon cap-and-trade and carbon abatement cost coefficient. When the carbon abatement cost coefficient increases, the financing scale and supply chain members’ profit both decrease, while when the price of carbon increases, the financing scale and manufacturers’ profit both increase. In addition, carbon cap-and-trade increases manufacturers’ profit, but harms retailers’ profit. [ABSTRACT FROM AUTHOR]

To evaluate the impact of boron（B） on the antioxidant enzymes（SOD, POD and CAT） in quinoa leaves, a pot experiment was conducted. In this experiment, three varieties of quinoa（Jinli No.1, Jinli No.2 and Jinli No.3） were selected, and quinoa leaves surfaces were treated with a spray containing 0%（CK）, 0.1%（B1）, 0.2%（B1）, and 0.3%（B3） of B for each variety quinoa for 2 times at elongation period. The results indicated that the stress resistance of quinoa improved with different boron. The variation of SOD, POD and CAT activities were observed in response to different boron levels. At the same growing period, the SOD activity in the quinoa leaves decreased, the POD activity first increased and then decreased, and the CAT activity increased with the increasing boron concentrations. At the same boron concentration, with the extension of the growing period, these antioxidant enzymes first increased and then decreased. The SOD activities in the three varieties of quinoa leaves were the highest in the grouting period, and they were 21.24%,15.26% and 10.33% lower at 0.3% B than that of CK, respectively. On the whole, the POD activities in the three varieties of quinoa leaves were the highest in the heading period, and they increased by-3.99%,-5.21% and 5.28% at 0.3% B than that of CK, respectively. The CAT activity in the three varieties quinoa leaves was the highest in the grouting period, and the CAT activity at 0.3% B were 25.31%, 26.19% and 29.48% higher than that of CK, respectively. At 0.3% B treatment, the SOD and POD activity in the three types of quinoa leaves were lower than those of CK, while CAT activity was higher. Boron was helpful to regulate the antioxidant enzyme level, remove reactive oxygen species and alleviate the adverse effects of boron deficiency on the growth of quinoa. The physiological characteristics in the three types of quinoa leaves at 0.3% B worked best. Above all, in actual production, 0.3% B was the best choice. [ABSTRACT FROM AUTHOR]

【Objective】To explore the optimal fertilization method and dosage for millet production in Chifeng City, Inner Mongolia.【Methods】In Harqin Banner, Chifeng City, using Jinmiao K1 as the experimental material, a total of 14 treatment levels of 4 fertilization methods were set up, including nitrogen and potassium topdressing (A), increased potassium fertilizer application (B), partial bacterial fertilizer replacing conventional fertilizer (C), and delayed fertilizer application (D) . The yield and yield traits such as fresh weight per plant, dry weight per plant, ear diameter, ear length, single ear weight, and grain weight of millet under different treatments were compared. The principal component analysis was used to evaluate the optimal fertilization method and dosage.【Results】The yields of millet under different treatments were 3 745.7-8 236.8 kg/hm² with a coefficient of variation of 20.49%. Yield was extremely significantly positively correlated with single ear weight, grain weight and ear diameter (P<0.01) . The first two extracted principal components covered 83.074% information of millet yield and yield traits. Comprehensive comparative analysis showed that nitrogen and potassium topdressing was beneficial to yield increase and yield traits improvement of millet. Two better treatments under this fertilization method were application of 375 kg/hm² triple compound fertilizer at seeding time, and watering application of 225.0 kg/hm² (A5) and 112.5 kg/hm² (A2) nitrogen and potassium fertilizer at flowering time.Increased potassium fertilizer application was beneficial to the yield increase of millet, but the performance of yield traits were poor. The optimal treatment under this fertilization method was application of 375 kg/hm² triple compound fertilizer and 225.0 kg/hm² of increased potassium sulfate (B3) at seeding time.Partial bacterial fertilizer replacing conventional fertilizer performed well in improving biological yield, but the level of grain yield was low. Under this fertilization method, the best treatment was application of 450 kg/hm² of triple compound fertilizer and 300 kg/hm² of bacterial fertilizer (C1) . Delayed fertilizer application had poor performance in both millet yield and yield traits.【Conclusion】Under nitrogen and potassium topdressing, applying 375 kg/hm² of triple compound fertilizer during seeding time, and watering application of 225.0 kg/hm² (A5) and 112.5 kg/hm² (A2) nitrogen and potassium fertilizer at flowering stage, were suitable for promotion and application in millet production in Chifeng City, Inner Mongolia. In partial bacterial fertilizer replacing conventional fertilizer, applying 450 kg/hm² of triple compound fertilizer and 300 kg/hm² of bacterial fertilizer (C1) was suitable for millet production with the main goal of harvesting biomass in Chifeng City, Inner Mongolia. [ABSTRACT FROM AUTHOR]

BACKGROUND: With the increase of population, urbanization development, the large discharge of industrial wastewater and the excessive application of agricultural nitrogen fertilizer, the problem of “three nitrogen” (nitrate nitrogen, ammonia nitrogen, and nitrite nitrogen) pollution in groundwater has become increasingly serious. Due to the slow flow, weak alternation degree and poor self-purification ability, the nitrogen polluted groundwater is difficult to rehabilitate and the repair cost is high. It is of great practical significance to carry out prevention and control from the pollution source. With the concealment, complexity and hysteretic groundwater pollution property, it is difficult to conduct the source analysis of nitrate in groundwater. Positive matrix factorization (PMF) model, as a new type of source analysis model, has more interpretable and clear physical significance in terms of factor load and source factor score. At present, the application of the PMF model in the source analysis of “three nitrogen” in groundwater media is rarely reported, and the research in this field needs to be deepened. Gas-phase molecular absorption spectrometry is a practical analytical method for nitrogen compounds with high accuracy, wide linear range without color and turbidity interference. This method does not require chemical separation, and uses few chemical reagents and innoxious reagents. At present, this method has been widely used in the analysis and determination of water quality, nitrite nitrogen, ammonia nitrogen, nitrate nitrogen, total nitrogen, and other substances. OBJECTIVES: To identify the source and distribution characteristics of the “three nitrogen” in shallow groundwater in the Hailun area. METHODS: (1) Determination of “three nitrogen” and other elements in groundwater samples. With GPS coordinates, the 40 shallow groundwater samples were collected in Helen River Basin and Zaying River Basin. The collection and preservation of groundwater samples were performed in accordance with the environmental standards HJ/T 164—2004, HJ/T 195—2005, HJ/T 197—2005 and the ecological industry standards DZ/T 0064—2021. The quality control of the “three nitrogen” test in groundwater was based on the requirements of the national standard GB/T 14848—2017, the technical requirements for analytical quality control of groundwater pollution investigation (DD 2014-15), and the specification of testing quality management for geological laboratories (DZ/T 0130—2006). Each batch contained twenty samples and the test process of each batch was equipped with laboratory blank, reference materials, laboratory duplicate samples and quality control of external monitoring samples. All of the laboratory blank results were less than 2 times the detection limit of the method. The added standard recovery rate of the sample matrix was between 80%-120%, with the relative deviation (RD) of the laboratory repeat samples under 15%. The qualified rate of external quality control sample was 100%. (2) Analysis of detection data. Statistics and analysis of “three nitrogen”, heavy metal content correlation and principal components in groundwater were carried out using WPS Office 2016 and SPSS 22.0. The spatial distribution map of “three nitrogen” content in groundwater was obtained by CoreDRAW X5.0 software. The Ⅲ class water criterion in Standard for Groundwater Quality (GB/T 14848—2017) was used as the criterion for drinking water source and industrial and agricultural water. The Nemerow pollution index was calculated and compared with the corresponding grade standard index. The PMF model was used to identify and quantify the contribution rate of each nitrogen source to comprehensively judge the source of “three nitrogen”. RESULTS: (1) The contents of “three nitrogen” and other elements in the groundwater samples in the study area were determined. According to the contents of “three nitrogen” and related parameters shown in Table 3, the detection rates of the nitrate nitrogen, ammonia nitrogen and nitrite nitrogen were 100%, 77.5% and 90.0%, respectively. The maximum detection content of nitrate nitrogen was 123.05mg/L, and average content was 15.27mg/L. The maximum detection content of ammonia nitrogen was 3.91mg/L, and average content was 0.33mg/L. The maximum detection content of nitrite nitrogen was 0.65mg/L, and average content was 0.12mg/L. Compared with the Ⅲ class water criterion, the nitrate nitrogen over standard rate was 20%, with the maximum value 6.18 times; the ammonia nitrogen over standard rate was 12.5%, with its maximum value 7.8 times; the nitrite nitrogen did not exceed the Ⅲ class water criterion. The content of Mn was ND-3.20mg/L, and the proportion of Mn in I-III class water range was 40%. The contents of 8 heavy metals including Cd were within 10 times the detection limit, with 100% Ⅰ-Ⅲ class water. The content of anion F− was 0.029-0.69mg/L. The content of anion Cl− ranged from 0.0027 to 310mg/L, with the 97.5% Ⅰ-Ⅲ class and 2.5% over standard rate. The content of SO4 2− was 0.46- 433mg/L, with the 95% Ⅰ-Ⅲ class and 5% over standard rate 　(2) The pollution and spatial distribution of groundwater were studied. The results of Nemerow comprehensive pollution evaluation showed that the pollution degree of “three nitrogen” in the study area was relatively low. The proportion of unpolluted samples, mild pollution samples, heavy pollution samples and serious pollution samples was 65%, 25%, 2.5% and 0, respectively (Table 4). “Three nitrogen” spatial distribution is shown in Fig.1a-c. Samples with ammonia nitrogen content ranging in Ⅰ-Ⅲ class water was mainly concentrated in the north, west, east and central; the Ⅳ class water samples were concentrated in the middle; the class V water samples were concentrated in the center. Fig.1a shows the trend of high ammonia nitrogen in the middle and low ammonia nitrogen on both sides. In Fig.1b, Ⅰ-Ⅲ class water samples of nitrate nitrogen were mainly concentrated in the central, east and north, with the Ⅳ class water in the middle and the class V water in the west. The samples with the highest and sub highest nitrate nitrogen content were located in the center of the study area, radially distributing along the Helen River Basin and the Zaying River Basin. The nitrate nitrogen content was high near the central area, with the low content far from the central area. The nitrite nitrogen in Fig.1c was Ⅰ-Ⅲ class water. The spatial distribution of the nitrite nitrogen shows the trend of high in the north and low in the south along the Helen River Basin. (3) Multivariate statistical analysis and source of “three nitrogen” in groundwater were studied. Multivariate statistical analysis of Pearson correlation coefficient showed that nitrate nitrogen had some homology with Cd, Co, Ni. Nitrate nitrogen in groundwater was significantly correlated with Cl− and SO4 2−, while ammonia nitrogen and nitrite nitrogen showed no correlation with anion. Sample detection data imported into EPA PMF5.0 software for PMF source analysis, and the industrial source, agricultural source, living source and natural factor source were taken as the four source analysis factors of “three nitrogen” in the groundwater in the study area. The PMF source analysis results are presented in Table 6 and Fig.2. The main sources of “three nitrogen” in the groundwater in the study area were the compound source of living and industrial source, which further indicated that human activity was the root cause of “three nitrogen” pollution in the groundwater in Helen area. According to the spatial distribution of “three nitrogen” in groundwater, the highest point of nitrate nitrogen pollution was distributed in the center of the research area, with the relatively developed human life and industrial activities in this area. The ammonia nitrogen pollution samples were related to the dense human activities in the middle of the study area. The over-standard area of nitrate nitrogen was higher than the ammonia nitrogen, which indicated that the compound source of living and industrial source was the main factor affecting the “three nitrogen” content in the groundwater in study area. CONCLUSIONS: The nitrate nitrogen and ammonia nitrogen are the nitrogen pollution components in the groundwater in the study area. Compared with the water index in groundwater quality standard (GB/T 14848—2017), the over standard rates of the nitrate nitrogen and ammonia nitrogen are 20% and 12.5% respectively. The groundwater quality with pollution evaluation grade I (unpolluted) to grade Ⅲ (moderate polluted) accounts for 92.5%, which indicates relatively light pollution. The spatial distribution of ammonia nitrogen in the study area shows a trend of high in the middle and low on both sides. Nitrate nitrogen and ammonia nitrogen pollution samples are mainly distributed in the center of the intensive human activity research area. The quantitative analysis results of the “three nitrogen” PMF analysis model show that the compound source of living and industry are the main source of nitrate nitrogen pollution in the study area, and the compound source of living and agricultural production is the main source of ammonia nitrogen pollution. Combining the situation with the source of the “three nitrogen” pollution in the research area, the project of the “three nitrogen” pollution prevention can be carried out to strengthen protection, sustainable development and utilization of groundwater resources in the Helen area. [ABSTRACT FROM AUTHOR]

In mobile edge computing( MEC) system, the terminal devices can decide whether to offload delay-sensitive tasks to edge nodes for execution due to insufficient local computing capacity and battery power. Aiming at the problem that user tasks randomly generated and system resources dynamically changed during the ofiloading process, this paper proposed an asynchronous reward deep deterministic policy gradient ( ARDDPG) algorithm. Different from the traditional policy of sequential waiting for execution of independent task resource allocation, the ARDD PG algorithm could execute the resource allocation in the time slot of the task generation without waiting for the completion of the execution of the previous task, and obtained the task calculation reward in asynchronous mode. The algorithm jointly optimized the task offload decision, system bandwidth and computing resource allocation under time delay constraints, and trained the neural network with depth deterministic policy gradient to explore the optimal performance. Simulation results show that compared with random strategy, baseline strategy and DQN algorithm, the ARDD PG algorithm can effectively reduce the task discarding rate and the delay and energy consumption of the system under different delay constraints and task generation rates. [ABSTRACT FROM AUTHOR]

In order to discuss the recycling cooperation strategy of supply chain members under the third-party recycling mode, a supply chain system composed of manufacturers, retailers and third-party recyclers was built. Considering government subsidies, product recycling cooperation strategies of manufacturers and third-party recyclers under cost sharing and task sharing recycling cooperation modes were studied. The optimal decisions and profits of supply chain members under the non-cooperation and two cooperation modes were calculated and the impacts of government subsidies on the profit of the supply chain members were analyzed. The research results showed that, government subsidies have a positive impact on supply chain members’ profits, no matter how government subsidies change, when manufacturers cooperate with their recyclers, the product recycling rate, supply chain members’ profits and their growth rate with subsidies are always higher than those without cooperation. When government subsidies and manufacturers’ cost recycling coefficient meet certain conditions, there is a greater recycling rate in the cost sharing mode, and supply chain members can obtain greater profits as well. [ABSTRACT FROM AUTHOR]

Clerodendrum cyrtophyllum is a common medicinal plant used by Miao people. In order to study the chemical constituents and antibacterial activities of C. cyrtophyllum in Guizhou, China. Macroporous adsorption resin, reversed phase column chromatography, silica gel column chromatography, Sephadex LH-20 column chromatagraphy, and semi-preparative high performance liquid chromatography were used to separate and purify 95% ethanol extracts from C. Cyrtophyllum. The antibacterial activities were evaluated by MTT method. The results showed 18 compounds were isolated and identified as friedelin(1), α-amyrin palmitate(2), sambuculin A(3), 22-dehydroclerosterol(4), isopetasin(5), taraxasteryl palmitate(6), stigmasterol(7), 22-dehydroclerosterol-3-O-β-D-(6'-O-margaroyl)-glucopyranoside(8), 3-O-β-D-galactopyranosyl-(24β)-ethylcholesta-5,22,25-trien(9), cistanoside D(10), tortoside F(11), balanophonin(12), luteoloside(13), acteoside(14), luteolin(15), acantrifoside E(16), trichotomside B(17), cistanoside C(18). Among of them, compounds 2, 3, 5, 6, 8-13, 16-18 were all isolated from C. cyrtophyllum for the first time. Besides,biological activity test showed Compound 13 had antibacterial activity against Streptococcus uberis. The study enriches the chemical composition of C. cyrtophyllum, and provides reference for the drug development of anti-mastitis of dairy cows. [ABSTRACT FROM AUTHOR]

BACKGROUND: As an important aluminosilicate, trace element contents affect the performance of the product. The kaolin standard substances GBW03121, GBW03122, GBW03122 a lack the recommended values of ten elements such as arsenic and antimony. Similar rock standard materials were used for monitoring the determination procedure, but the accurate results of the kaolin samples may be affected. OBJECTIVES: To establish a method for accurate determination of 10 trace elements in kaolin sample such as arsenic and antimony. METHODS: With microwave digestion technology, the nitrate-hydrofluoric acid system and nitrate-hydrofluoric-peroxide system were compared for the procedural heating conditions and dissolution time of microwave digestion. Interference factors of the inductively coupled plasma mass spectrum were also investigated. RESULTS: The detection limits of 10 elements were 0.01-0.09 mg/kg, and measurement limits were 0.03-0.30 mg/kg. The accuracy and precision of the method were directly verified by using rock reference materials. The element recovery was between 90.9% and 103.2%, and the relative standard deviation (RSD) was between 1.2% and 5.8%. At the same time, a comprehensive evaluation of the uncertainty of the method was carried out, and the method was proved to be accurate and reliable. CONCLUSIONS: This method has little acid dosage, shortens the measurement time, and reduces the damage on the environment and human, making it suitable for the batch analysis of 10 trace elements in kaolin samples. The method also provides a reference for the determination of the certified values of 10 trace elements such as As and Sb in the national standard material of kaolin. [ABSTRACT FROM AUTHOR]

BACKGROUND: As important industrial chemicals, intermediates and organic solvents, volatile organic compounds (voes) have increased the impact on the environment and human health with the development of human industry and agriculture. As a densely populated and highly industrialized plain area, the concentration of VOes in groundwater of the Lower Liaohe River Plain poses potential risks to human health as human activities constantly intensify. OBJECTIVES: To study the pollution characteristics of VOes and the health risks in groundwater in the Lower Liaohe Plain. METHODS: The concentration of 60 voes in groundwater samples was determined by purge and trap - gas chromatography/mass spectrometry (PT - Ge/MS) to investigate the voes pollution sources. By calculating the long - term intake of pollutants with three voes exposure routes via oral drinking' bath respiratory inhalation' and bath skin exposure, the health risk was assessed by the eSOIL health risk assessment model. RESULTS: The VOes in 20 sampling sites were detectable from the whole 24 sampling sites, with a detection rate of 83.3% . The content of naphthalene, benzene, 1, 2 - dichloropropane in some sites exceeded the limits of the standard for groundwater quality ( GB 14848-2017, limit values of 100, 10.0, 5.0 µg/L) . The industrial sources were the main sources of groundwater VOes in the study area. The total carcinogenic risk index of VOes in groundwater samples was 0- 4.0 x 105, and the total non - carcinogenic risk index was 0- 0.93. Both were lower than the standard recommended by US EPA ( United States Environmental Protection Agency) . The health risk index in groundwater around enterprise land was higher than in the groundwater of agricultural land. CONCLUSIONS: The study shows that the VOes detection rate is higher in groundwater in the lower Liaohe River Plain, however, the health risk is within acceptable levels for people. It provides reference for the control of VOes pollution from regional groundwater industrial sources. [ABSTRACT FROM AUTHOR]

Ｉｎ ｔｈｅ ｕｎｉｆｉｅｄ ｃｒｅｄｉｔ ｍｏｄｅ ｏｆ ｉｎｖｅｎｔｏｒｙ ｐｌｅｄｇｅ ｆｉｎａｎｃｉｎｇꎬ ｌｏｇｉｓｔｉｃｓ ｅｎｔｅｒｐｒｉｓｅｓ ｍａｙ ｕｎｄｅｒｇｏ ｍｏｒａｌ ｈａｚａｒｄｓ ｏｆ ｌｅｓｓ ｅｆｆｏｒｔｓ ｉｎ ｃｒｅｄｉｔ ｒｅｖｉｅｗｉｎｇ ｂｅｃａｕｓｅ ｏｆ ｔｈｅ ｉｎｆｏｒｍａｔｉｏｎ ａｓｙｍｍｅｔｒｙ ｂｅｔｗｅｅｎ ｔｈｅｍ ａｎｄ ｂａｎｋｓꎬ ａｎｄ ｂａｎｋｓ ａｓ ｃｌｉｅｎｔｓ ｎｅｅｄ ｔｏ ｄｅｓｉｇｎ ｉｎｃｅｎｔｉｖｅ ｍｅｃｈａｎｉｓｍｓ ｔｏ ｐｒｅｖｅｎｔ ｍｏｒａｌ ｈａｚａｒｄｓ. Ａｓ ａｎ ｉｎｃｅｎｔｉｖｅ ｍｅｃｈａｎｉｓｍꎬ ｐｒｏｆｉｔ ｄｉｓｔｒｉｂｕｔｉｏｎ ｃａｎ ｐｌａｙ ａ ｃｅｒｔａｉｎ ｒｏｌｅ ｉｎ ｒｅｓｔｒａｉｎｉｎｇ ｍｏｒａｌ ｈａｚａｒｄｓ. Ｃｏｎｓｉｄｅｒｉｎｇ ｔｈｅ ｍｏｒａｌ ｈａｚａｒｄｓ ｏｆ ｌｏｇｉｓｔｉｃｓ ｅｎｔｅｒｐｒｉｓｅｓꎬ ｂａｓｅｄ ｏｎ ｔｈｅ ｐｒｉｎｃｉｐａｌ￣ａｇｅｎｔ ｔｈｅｏｒｙꎬ ｔｈｅ ｉｎｃｅｎｔｉｖｅ ｐｒｏｂｌｅｍ ｏｆ ｂａｎｋｓ ｔｏ ｌｏｇｉｓｔｉｃｓ ｅｎｔｅｒｐｒｉｓｅｓ ｗａｓ ｓｔｕｄｉｅｄꎬ ｔｈｅ ｐｒｏｆｉｔ ｄｉｓｔｒｉｂｕｔｉｏｎ ｍｏｄｅｌ ｗａｓ ｅｓｔａｂｌｉｓｈｅｄ ａｎｄ ｔｈｅ ｏｐｔｉｍａｌ ｐｒｏｆｉｔ ｄｉｓｔｒｉｂｕｔｉｏｎ ｐｒｏｐｏｒｔｉｏｎ ｗａｓ ｏｂｔａｉｎｅｄꎬ ａｎｄ ｔｈｅ ｃｈａｎｇｉｎｇ ｔｒｅｎｄ ｏｆ ｏｐｔｉｍａｌ ｐｒｏｆｉｔ ｄｉｓｔｒｉｂｕｔｉｏｎ ｐｒｏｐｏｒｔｉｏｎｓ ｂｙ ｎｕｍｅｒｉｃａｌ ｅｘａｍｐｌｅｓ ｗａｓ ａｎａｌｙｚｅｄ. Ｉｔ ｗａｓ ｓｈｏｗｎ ｔｈａｔ ｔｈｅ ｏｐｔｉｍａｌ ｐｒｏｆｉｔ ｄｉｓｔｒｉｂｕｔｉｏｎ ｐｒｏｐｏｒｔｉｏｎ ｅｎａｂｌｅｓ ｌｏｇｉｓｔｉｃｓ ｅｎｔｅｒｐｒｉｓｅｓ ｔｏ ｉｎｖｅｓｔ ｔｈｅ ｂｅｓｔ ｅｆｆｏｒｔ ｌｅｖｅｌ ａｎｄ ｒｅａｌｉｚｅ ｔｈｅ ｍａｘｉｍｉｚａｔｉｏｎ ｏｆ ｃｏｍｂｉｎｅｄ ｂｅｎｅｆｉｔｓ ｆｏｒ ｂｏｔｈ ｂａｎｋｓ ａｎｄ ｌｏｇｉｓｔｉｃｓ ｅｎｔｅｒｐｒｉｓｅｓ. [ABSTRACT FROM AUTHOR]

Objective: To evaluate the efficacy of repeated transcranial magnetic stimulation (rTMS) com­bined with antidepressant in patients with poststroke depression (PSD). Methods: Scientific databases including PubMed, Cochrane library, OVID, China National Knowledge Infrastructure (CNKI), Chinese biomedical database,(CBM), Wanfang Data, Chinese science and technology data (VIP) were searched, Only randomized controlled studies were included. Selected studies data were analyzed using RevMan5. 3 and random effects model, Statistical process selection weighted mean difference (WMD) method, Comparisons were conducted to confirm whether there were significant differences in two groups. Results: Thirteen studies including 1033 subjects were analyzed The literatures were divided into low frequency and high frequency subgroups. The Hamilton Rating Scale for Depression (HAMD) scores were significantly lower in the low frequency (WMD = -4. 24, 95% Cl: -6.51 - - L 92) and high frequency (WMD = - 4. 00, 95% Cl: - 4. 56 - - 3. 65) intervention groups than in the control group. The scores of National Institutes of Health Stroke Scale (NIHSS) (WMD = -2. 21, 95% Cl: - 3. 04 - - L 38), Mini Mental State Examination (MMSE) (WMD = -7. 00, 95% Cl: - 7. 64 - - 6. 36), and the Barthel index or the Modified Barthel index ( BI or MBI) were significantly higher in the intervention group than in the control group. Conclusion: It suggests that RTMS combined with antidepressants could significantly improve depressive symptoms, more conducive to the recovery of neurological function in patients, improving cognition and the quality of life of patients. [ABSTRACT FROM AUTHOR]

Supply chain has increasingly become a main mode of competition in the market. Once a retailer in the supply chain falls into financial distress， it will be passed on to others by quantity of goods， which may lead to a distress of the whole supply chain. In a two-stage supply chain with a single manufacturer and retailer， based on the business effort level and effort cost， the process of how financial distress goes from the retailer to the manufacturer was described and the manufacturer's decision-making under the centralized financial distress was explored under various contexts. The results showed that in the case of lighter distress ， both the manufacturer and the retailer tend to adopt the centralized decision-making， and in a severe predicament， the manufacturer should change decisions or cancel strategic partnership to prevent the transmission of financial distress. Finally， an example is given to illustrate the specific application of the decision model and verify its feasibility. [ABSTRACT FROM AUTHOR]

Objective: To investigate the current situation of pregnancy distress and related factors in the third trimester of pregnancy, and explore its association with self-compassion and emotional inhibition. Methods: A total of 214 women in the third trimester of pregnancy were selected and measured the pregnancy pain, self-compassion and emotional depression levels of pregnant women in the third trimester with the Tilburg Pregnancy Pain Scale (TPDS), Self-Compassion Scale (SCS), and Emotional Suppression Scale (EIS). Results: The average score of pregnancy distress of 214 pregnant women in the third trimester was (26.7±4.9), with a medium level of pregnancy distress. Multiple linear regression analysis showed that the total scores of pregnancy distress in the third trimester of pregnancy were negatively associated with the accompanying situation of the lover (β = 0. 15, P < 0.05), the number of accompanying prenatal examinations (β = 0. 24, P<0.05) and the total scores of self-compassion (β = 0. 12, P<0.05), while positively correlated with gestational age (β = 0. 14, P<0.05), complications (β = 0. 15, P <0.05), and the total score of emotional suppression (β = 0. 17, P <0.05). Conclusion: Pregnancy distress is common in pregnant women in the third trimester, which may be related to gestational age and complications, companionship of loved ones, number of accompanying prenatal examinations, self-compassion level and emotional inhibition. [ABSTRACT FROM AUTHOR]

Aiming at the relay system of MABC, this paper studied the optimization of resource allocation strategy, and combined the power allocation problem with relay selection problem. Based on this, the paper proposed a multi-relay system resource allocation strategy ( IS-MABC-OPOR) with interference MABC model. Considering the influence of interference signals on the transmission performance of two-way relay system, and aiming at maximizing the channel capacity of communication links, optimal power allocation and optimal relay selection for each node on the communication link used the Lagrangian method, and gave the mathematical expression of resource allocation under the maximum channel capacity of the communication link. The simulation results show that the channel capacity of the link is constrained by the relay node location and the total power of the link. Compared with the equal power allocation scheme(EPA), the random power allocation scheme(RPA ) and the channel gain of the interference signal on the basis of the proposed scheme, the IS-MABC-OPOR scheme effectively increases the channel capacity, thereby realizing resources to meet higher-speed service transmission requirements. [ABSTRACT FROM AUTHOR]

Energy efficiency (EE) has become a new indicator of network performance, and maximizing EE has become a hotspot in communication technology. In order to solve the problem of EE optimization in Macro/Femtocell heterogeneous network (HetNet) , this paper applied the bat algorithm to the problem firstly. Then.it proposed an inertial weight bat algorithm based on exponential decreasing. Aiming at the maximize the network EE as the optimization target.it used the improved algorithm to carry out the carrier allocation under the premise of satisfying the quality of service (QoS) .and compared the performance with the standard bat and genetic algorithm. The simulation results show that the number of carriers and users affects the EE. The proposed algorithm improves the transmission rate of the network and improves the EE by about 11% compared with the genetic algorithm. Experiments show that in the HetNet,the use of improved bat algorithm for carrier allocation can improve EE. [ABSTRACT FROM AUTHOR]

BACKGROUND: At present, the supervision of antibiotic abuse and its research is being strengthened. In recent years, antibiotics have been detected in varying degrees in water in central China. This reinforces the concern of the pollution of antibiotics in surface and groundwater. OBJECTIVES: To investigate the distribution characteristics of 29 antibiotics in groundwater in Harbin. METHODS: A total of 26 groups of groundwater samples were collected in Harbin, and the sampling scope included habitation and production areas such as densely populated, industrial production, agricultural districts and animal husbandry. The ultra - performance liquid chromatography - triple quadrupole mass spectrometry method was used to analyze 29 kinds of antibiotics covering six types, including sulfonamides, quinolones, macrolides, f3 - lactams, tetracyclines, and lincosamides. RESULTS: Antibiotics in the groundwater of Harbin were mainly composed of sulfonamides, quinolones, macrolides and tetracyclines and the detection rates were 61.5%, 46.2%, 42.3% and 38.5%, respectively. The content of antibiotics detected ranged from 0. 02 to 681 ng/L, and the highest contents of sulfathiazole, sulfadiazine, and lincomycin were more than 100ng/L. The average content of quinolones was low compared with some domestic and international areas (such as Beijing, Tianjin, and Barcelona). Sampling sites with higher antibiotic levels were mainly found in the central, southern and eastern regions of the city. These areas are also relatively densely populated and are generally distributed around pharmaceutical factories, urban sewage outlets, and poultry and livestock farms. CONCLUSIONS: The distribution characteristics of antibiotics in groundwater in Harbin are strongly related to the impact of human production and living activities. [ABSTRACT FROM AUTHOR]

Cadmium(Cd) in grains came from the soil. The form of cadmium in soil was closely related to the amount absorption of crops. The purpose of this paper was to find out the correlationship between the form of cadmium in soil and cadmium in grains, aimed to explore the source of cadmium in wheat/ rice grain, which provided theoretical basis for blocking-up cadmium absorption. Through investigating and sampling method, Cd content in paddy soil of tillage layer on Chengdu plain cadmium polluted area and the corresponding crop straw and grain were analyzed, which used to research the distribution characteristics and biological effects of different forms cadmium in these paddy soils. The results showed that the order of average content of different Cd forms in paddy soil was; O-FeMn > RE > EX > OM > CAB. The content distribution of different forms of Cd were extremely uneven, and the proportion of bio-available form was larger. There was a significant positive correlation between O-FeMn and pH, (r = 0. 712, P <0. 01) . The Cd content in wheat and rice were significantly positive correlated with wheat straw(r= 0.854* *, P< 0.01) and rice straw(r= 0.872* ", P<0.01) respectively. The EX-Cd in soil correlated with wheat straw and seed, respectively (r = 0.677 * and 0. 867 *, P < 0.01), but not other forms of Cd in soil. The EX-Cd content in soil was only correlated with Cd in rice grain (r = 0. 573 *, P <0. 05). The risk of Cd-exceed the standard in the grain of the crops which was grown on the polluted soil was high. [ABSTRACT FROM AUTHOR]