基于Nginx+sticky实现cookie负载均衡的建设与研究

为解决在某些场景中前端CDN、局域网、客户端集中NAT出口IP等多人来访时,出现IP访问倾斜、丢失和负载不均衡等问题,通过研究Nginx系统的原理与实现方法,结合Web应用中的Cookie保持会话机制,提出了基于Nginx和sticky模块实现的cookie负载均衡方案。实验结果表明,基于sticky cookie实现可有效解决IP倾斜、丢失和负载不均衡等问题,同时在多人来访、用户量高并发的情况下,能够维持每个会话持久性、一致性和服务器压力均衡性。特别是在应用类集群环境共享状态信息下,Sticky cookie会话保持算法仍有助于提高性能。

Integrated Assessment of Trapping Efficiency of Colored Sticky Cards and Sex Pheromone on Liriomyza spp.and Plutella xylostella

[Objective] To evaluate the control effect of yellow sticky cards and sex pheromone on Plutella xylostella and Liriomyza spp.,which can provide reference for large area extension of the technique.[Method] The integrated assessment of trapping efficiency of colored sticky cards and sex pheromone on Liriomyza spp.and Plutella xylostella was conducted by field surveys and structured interview in Tonghai County,Yunnan Province,China.[Result] The results showed that yellow sticky cards and sex pheromone have strong power of trapping Liriomyza spp.and Plutella xylostella（3 414±720 and（219±157） head/piece,respectively）;the control cost by the usage of pesticide is the highest,（10 099.5±2 752.5） yuan/hm^2,yellow sticky cards and sex pheromone takes the second place,（1 125.0±465.0） yuan/hm^2,the control cost by the usage of yellow sticky cards is the lowest,（450.0 ±186.0）yuan/hm^2.Without the usage of yellow sticky cards and sex pheromone,pesticide application times and costs are（15.0±2.7） times and（12 070.5±2 136.0） yuan/hm^2;combined with usage of yellow sticky cards and sex pheromone,pesticide application times and costs reduce by 5.7 times and 4 618.5 yuan/hm^2.The ratio of trapped beneficial insects and target pests was 1 ∶1 131,which showed that the negative effect of yellow sticky cards and sex pheromone on the non-target insects was very limited.[Conclusion] The trapping approach has become popular among all the local farmers.Looking at the above factors,the trapping technology has strong application prospect and promotion value in pest control field.

Study on Engineering Characteristics and Application of Sticky Rice

Sticky rice is not only a notoriously food, or a kind of important medicinal herb, but also serves as a kind of important engineering materials having rich re- sources. Sticky rice has excellent toughness, anti-seepage property, bonding proper- ty, reinforcing property, high strength and superior engineering performance with su- perior engineering value, ecolOgical value and landscape value on account of its starch composition mainly composed of amylopectin of which the granules are poly- hedron. The development and application of sticky rice has important strategic signif- icance to promotion of sustainable development of ecological landscape construction, alleviation of resource shortage, reduction of environmental pollution, acceleration of constructing environmental friendly society and realization of sustainable development of China.

Effect of Colored Sticky Cards on Non-target Insects

Field experiments to evaluate four different colored sticky cards for trapping non-target insects were conducted in an organic maize field in the Heinigou region of China. Yellow, blue, green, and red sticky cards were used to trap insects in the field. The total number of insects species caught was 54, with 3,862 individuals recorded. Over half of the specimens caught were non-target insects, including phytophagous insects, particularly dipteran species(including many mosquitoes)(50.3%), followed by target pests(37.0%), and beneficial insects(12.7%). Statistical analysis revealed a significant difference in attraction to target pests, non-target pests, and beneficial insects among treatment groups. The results showed that higher numbers of target pests(Myzus persicae Sulzer, Empoasca flavescens Fabricius, Nysius ericaecshinly Schilling) were caught on yellow sticky card traps compared with blue, green, or red sticky card traps, indicating that yellow was the best trap color for target pests, with green and blue being progressively less attractive. For non-target insects, including phytophagous insects, flies, and mosquitoes,higher numbers of were caught on blue sticky card traps compared with yellow,green, or red sticky card traps. Our study indicated that blue was the most attractive color for flies, especially for the housefly, Musca domestica Linnaeus. Our study also showed that most beneficial insects exhibited preferences to particular trap color characteristics: yellow was the most attractive color for parasitic wasps and lady beetles; blue was the most attractive color for hoverflies and honeybees. In contrast,green and red had no significant attraction to beneficial insects.

Preference of Adult Bradysia odoriphaga Yang et Zhang to Different Colors and Trapping Effect of Yellow Sticky Trap

The trapping effects of yellow, blue, green, cyan and white sticky traps on adult Bradysia odoriphaga Yang et Zhang were studied in the field during its peak occurrence period. The results showed that yellow sticky trap received the best trapping effect on adult B. odoriphaga, follow by blue and green sticky traps, while cyan and white sticky traps received worse effects. The yellow sticky trap settled at south position was most attractive to adult B. odoriphaga, which had significant differences with tho^e placed at east and north positions （P 〈 0.05 ） ; the yellow sticky trap at hanging height of 0 cm showed significantly higher attractive- ness than those at heights of 20 and 40 cm.

New technique for removal of perfluorocarbon liquid related sticky silicone oil and literature review

AIM:To investigate the safety and efficacy of sticky silicone oil(SSO)removal using a 22-gauge vein detained needle and inner limiting membrane(ILM)wrap-and-peel technique.METHODS:This retrospective consecutive case series reviewed the records of patients with a history of retinal detachment who had received silicone oil and perfluorocarbon liquid(PFCL)as intraocular tamponades.Patients were included in the analysis if they exhibited SSO remnants during silicone oil removal.The aspiration of most of the SSO remnants was performed by a 22-gauge vein detained needle.The small amounts of droplets adhered to the macula and epi-macular membrane were subsequently removed by the ILM warp-and-peel technique.The anatomical and functional outcomes,and postoperative complications were recorded.In vitro experiments were performed to simulate the formation of SSO remnants in four groups.RESULTS:Of 711 patients who underwent silicone oil removal during the study period,9 patients exhibited SSO remnants and underwent follow-up for at least 3mo.Seven eyes(78%)underwent the ILM wrap-and-peel technique to completely remove small droplets of SSO that were glued to the macula and epi-macular membrane.No obvious complications occurred.Postoperative optical coherence tomography revealed normal retinal structure in all patients.In vitro analyses showed that balanced salt solution and prolonged vibration(for 1wk)had the strongest effects on silicone oil and PFCL compound opacities.CONCLUSION:SSO remnants could be removed in an intact manner and without complications,using a vein detained needle-assisted and ILM wrap-and-peel technique.The findings suggest that PFCL and infusion fluid should be completely removed before silicone oil injection to prevent SSO formation.

Attraction of <i>Idioscopus clypealis</i>(Leith) (Cicadellidae: Homoptera) to Sticky Colored Traps in Mango Orchard

The present study was conducted at the Faiz Chaman mango orchard, Multan to find out the attraction of mango hopper Idioscopus clypealis to sticky traps of different colors. The experiment was laid out in randomized complete block designed with three replications. The sticky traps were hung vertically with the branch/twig under the canopy of mango trees. Data were recorded under binocular stereoscope. Results indicated significant differences in the number of I. clypealis (adults) captured in the different colored sticky traps. Yellow color was found most attractive with a capture of highest number of adults of I. clypealis (11.53 adults/trap). While pink and purple colors were found less attractive. The peak population of mango hoppers was recorded at the 31.96&degC during 25-April to 9-May. Yellow sticky traps were found most effective in trapping a considerably higher number of hoppers throughout the study period. Correlation analysis revealed a strong positive correlation between temperature and the mean number of I. clypealis adults. Population peaks of I. clypealis were recorded at temperatures >30&degC, while at lower temperatures relatively low numbers of adults were recorded.

一种并行的Sticky位计算方法

本文提出了通过基于预处理和逻辑转换的并行Sticky位的计算方法。该方法已经成功地应用到64位高性能CPU的浮点部件设计中,能有效提高浮点部件的延时性能。

Empirical Research on Sticky Cost in Strategic Emerging Industries

Cost Stickiness theory believe that costs do not linearly change with the volume ofbusiness, when business increased it increases more cost than when business volume decreased by the same amount it reduces. Use sticky cost theory to the process of cost management can improve the efficiency of enterprises＇ cost plan and cost control. The national twelith five year plan proposed to vigorously develop strategic emerging industries, if the strategic emerging industry also has the cost stickiness, we can apply sticky cost theory to the process its cost management. The author selected 120 listing corporations＇ financial data in China during 2007-2012 belongs to the emerging industries. Through empirical study, we found that the strategic emerging industry does not exist sticky cost beheavior. This may because China＇s strategic emerging industrie is still in the initial reason.

Strength Experiment and Mechanism Analysis of Cement Mortar with Sticky Rice Pulp

Cement mortar with sticky rice pulp is an innovative composite material.Investigating its mechanical properties and strength mechanism is essential for the future engineering application.Taking the pulp concentration and the mortar ages as the variables,we tested five groups of blocks for the compressive strength and flexural strength,and observed their microstructures with a scanning electronic microscope.The results indicated that the microstructure got dense if the added pulp had a concentration of about 0.3%,and thereby its flexural strength would significantly improve,while the hydration products agglomerated and the microstructure got loose if the added pulp had a concentration of more than 1.0%,which caused a substantial decline in flexural strength.Besides,the hydration reaction was hindered at the early stage due to the addition of the pulp;hence the early strength of the mortar is on the low side.According to the strength mechanism analysis,all the results are mainly attributed to the effects:"water-reduction",agglomeration and retarding,caused by the addition of the pulp.

Sticky Bone联合CGF应用于窄牙槽嵴种植修复

Sticky Bone骨增量理念于2019年由Sohn教授首次提出,相比于其他骨增量方式,其具有人工骨成型高可塑性及稳定性的特点[1]。目前国内尚未见有Sticky Bone骨增量病例的相关文献报道。本病例将报道1例后牙缺牙区牙槽嵴过窄患者应用Sticky Bone联合浓缩生长因子(concentrate growth factors,CGF)骨增量技术,术后成功获得充足骨量,种植术后1年硬组织稳定。

sticky bone混合浓缩生长因子应用于水平骨增量患者的临床效果研究

目的研究sticky bone混合浓缩生长因子(CGF)在水平骨量缺损患者中的骨增量效果。方法选取2021年9月至2023年2月于济南市口腔医院口腔颌面外科就诊的拟行水平骨增量的单颗牙缺失患者共40例,使用随机数表法将其分为使用Bio-Oss骨粉行引导骨再生术(GBR)的对照组和使用sticky bone混合CGF行GBR的研究组,比较两组术后6个月的种植体骨结合成功率、种植位点的牙槽骨宽度、骨增量宽度、植骨手术时间及术后并发症等。结果术后6个月,两组受试者的种植体骨结合成功率均为100%;研究组和对照组术后6个月的牙槽骨宽度分别为(8.3±0.8)、(7.1±1.0)mm,均大于术前[(3.6±0.6)、(3.8±0.8)mm],差异均有统计学意义(t研究组=22.13,t对照组=11.99,P均<0.001);术后6个月时,研究组的牙槽骨宽度(t2)、骨增量宽度(t2-t0)分别为(8.3±0.8)、(4.7±0.7)mm,均高于对照组[(7.1±1.0)、(3.3±0.8)mm],差异有统计学意义(tt2=-4.406,tt2-t0=5.978,P<0.001);研究组植骨手术时间[(6.5±1.1)min]显著低于对照组[(8.1±1.3)min],差异有统计学意义(t=4.196,P<0.001);40例受试者均未出现严重术后并发症。结论与使用Bio-Oss骨粉的GBR技术相比,使用sticky bone混合CGF的GBR技术具有更好的水平骨增量效果,其远期效果仍需进一步研究。

Traditional mortar represented by sticky rice lime mortar——One of the great inventions in ancient China

The development of traditional lime-based bond in ancient times was reviewed in this paper.It was proved by a lot of historical data that the application of organic materials in inorganic mortar was a sharp-cut characteristic during the developing process of construction gelled materials in ancient China.The important role sticky rice mortar ever played and the historical significance were revealed.Due to the excellent performance,such as high adhesive strength,good toughness,water-proof and so on,traditional mortar represented by sticky rice mortar should be one of the greatest technological contributions of the day in the world.Modern technology was employed in the study of the sticky rice lime mortar and the researching results of our laboratory and some researchers,including the compo-sition and the mechanism of solidification,were also presented.It was found that the sticky rice acted as a matrix of bio-mineralization which affected the microstructure of the calcium carbonate crystal and there was cooperation between sticky rice and calcite produced during the solidifying of the sticky rice mortar,which maybe lead to the excellent performance of the mortar.Because of excellent performance and importance in science,sticky rice mortar can be regarded as one of the greatest inventions in construction history of China.Relative research of sticky mortar will be of importance for the exploring of ancient momentous invention and the repairing of ancient construction.

Incorporation of sticky information and product diversification into static game of open innovation

Platform economics has promoted open innovation through sufficient channels to reveal and exchange knowledge with experts or valued customers.However,innovation also suffers from information stickiness and product diversification risks.In order to design an innovation strategy on a platform,this study incorporated these risks into game models of open innovation and proposed strategies to promote open innovation and welfare through equilibrium analysis.On the basis of the literature analysis of these risks,stochastic pay-off functions were constructed to regulate and stabilize the knowledge exchange flows.From equilibrium analysis of the game models,we conclude that:1)stickiness and diversification are critical factors for open innovation on a platform;2)at the beginning,a broad search is necessary to acquire diverse knowledge;at the middle stage,regulation of knowledge exchange is critical to achieving equilibrium and higher profits;and 3)global welfare could be elevated through adjustment of knowledge size and friction of communication.

Stationary distributions for two-dimensional sticky Brownian motions:Exact tail asymptotics and extreme value distributions

Sticky Brownian motions can be viewed as time-changed semimartingale reflecting Brownian motions,which find applications in many areas including queueing theory and mathematical finance.In this paper,we focus on stationary distributions for sticky Brownian motions.Main results obtained here include tail asymptotic properties in the marginal distributions and joint distributions.The kernel method,copula concept and extreme value theory are the main tools used in our analysis.

Gravid oviposition sticky trap and dengue non-structural 1 antigen test for early surveillance of dengue in multi-storey dwellings: study protocol of a cluster randomized controlled trial

Background:Dengue is a global disease,transmitted by the Aedes vectors.In 2018,there were 80615 dengue cases with 147 deaths in Malaysia.Currently,the nationwide surveillance programs are dependent on Aedes larval surveys and notifications of lab-confirmed human infections.The existing,reactive programs appear to lack sensitivity and proactivity.More efficient dengue vector surveillance/control methods are needed.Methods:A parallel,cluster,randomized controlled,interventional trial is being conducted for 18 months in Damansara Damai,Selangor,Malaysia,to determine the efficacy of using gravid oviposition sticky(GOS)trap and dengue non-structural 1(NS1)antigen test for early surveillance of dengue among Aedes mosquitoes to reduce dengue outbreaks.Eight residential apartments were randomly assigned into intervention and control arms.GOS traps are set at the apartments to collect Aedes weekly,following which dengue NS1 antigen is deteaed in these mosquitoes.When a dengue-positive mosquito is detected,the community will be advised to execute vector search-and-destroy and protective measures.The primary outcome concerns the the percentage change in the(i)number of dengue cases and(ii)durations of dengue outbreaks.Whereas other outcome measures include the change in density threshold of Aedes and changes in dengue-related knowledge,attitude and practice among cluster inhabitants.Discussion:This is a proactive and early dengue surveillance in the mosquito vector that does not rely on notification of dengue cases.Surveillance using the GOS traps should be able to efficiently provide sufficient coverage for multistorey dwellings where population per unit area is likely to be higher.Furthermore,trapping dengue-infected mosquitoes using the GOS trap,helps to halt the dengue transmission carried by the mosquito.It is envisaged that the results of this randomized controlled trial will provide a new proactive,cheap and targeted surveillance tool for the prevention and control of dengue outbreaks.Trial registration:This is a parallel-cluster,randomized controlled,interventional trial,registered at ClinicalTrials.gov(ID:NCT03799237),on 8th January 2019(retrospectively registered).

On the Image Reconstruction of Zhuge Liang in ACGN Games Based on the Perspective of the Tipping Point Theory

Zhuge Liang,a well-known figure with rich cultural implications in Chinese history,has exerted profound influences on the spiritual life of the Chinese nation.In the ACGN context,new cultural implications have been attached to him,which offset some of the classic implications of the character forged over a long history.Meanwhile,the inherent traditional cultural spirit embodied by him is being reconstructed.In terms of content design,the ACGN games based on traditional realism tend to refresh people’s collective memories of Zhuge Liang to enhance the stickiness factor of the games,thus creating a sense of familiarity to make the transmitted information easier for the game players to accept.The modern fashionable games,however,are good at leveraging the advantages of technologies to form a tipping point and incorporating fashion elements into the traditional image of Zhuge Liang to attract players,thus enhancing the communication effect.In terms of environmental construction,the ACGN games have created a new industrial environment featuring“ACGN+traditional culture,”which changes the traditional image of Zhuge Liang by means of ACGN game technology while retaining its basic cultural characteristics to provide players with a better immersive and interactive experience.

Linux中文件三种特殊权限的探讨

Linux系统中的文件权限除了读、写、执行之外,还有三种特殊权限,即Suid、Sgid和Sticky。本文对这三种特殊权限的意义和用法进行探讨,并举例说明这些权限在实际工作中的应用。

Linux中文件三种特殊权限的探讨

Linux系统中的文件权限除了读、写、执行之外，还有三种特殊权限，即Suid、Sgid和Sticky。本文对这三种特殊权限的意义和用法进行探讨，并举例说明这些权限在实际工作中的应用。

Evolution,current status and advances in application of platelet concentrate in periodontics and implantology

Platelet concentrates(PC) [platelet-rich plasma(PRP) and platelet-rich fibrin(PRF)] are frequently used for surgical procedures in medical and dental fields,particularly in oral and maxillofacial surgery,plastic surgery and sports medicine.The objective of all these technologies is to extract all the elements from a blood sample that could be used to improve healing and promote tissue regeneration.Although leukocyte rich and leukocyte poor PRP's have their own place in literature,the importance of non-platelet components in a platelet concentrate remains a mystery.PC have come a long way since its first appearance in 1954 to the T-PRF,A-PRF and i-PRF introduced recently.These PC find varied applications successfully in periodontics and implant dentistry as well.However,the technique of preparation,standing time,transfer process,temperature of centrifuge,vibration,etc.,are the various factors for the mixed results reported in the literature.Until the introduction of a proper classification of terminologies,the PC were known by different names in different countries and by different commercial companies which also created a lot of confusion.This review intends to clarify all these confusion by briefing the exact evolution of PC,their preparation techniques,recent advances and their various clinical and technical aspects and applications.